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Author SHA1 Message Date
Cheng-Han Wu
abdca14655 Docs/admin-guide/mm/damon: fix 'parametrs' typo 
Fix the misspelling of "parametrs" as "parameters" in reclaim.rst and
lru_sort.rst.

Link: https://lore.kernel.org/20260426231619.107231-3-sj@kernel.org
Signed-off-by: Cheng-Han Wu <hank20010209@gmail.com>
Signed-off-by: SeongJae Park <sj@kernel.org>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: Asier Gutierrez <gutierrez.asier@huawei-partners.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Liew Rui Yan <aethernet65535@gmail.com>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-05-28 21:04:55 -07:00
SeongJae Park
59ebdeedb5 Docs/admin-guide/mm/damon/usage: document fail_charge_{num,denom} files 
Update DAMON usage document for the DAMOS action failed regions quota
charge ratio control sysfs files.

Link: https://lore.kernel.org/20260428013402.115171-7-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-05-28 21:04:43 -07:00
Jakub Kicinski
d44646fc9e Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 
Cross-merge networking fixes after downstream PR (net-7.1-rc6).

Conflicts:

drivers/net/phy/air_en8811h.c
  d895767c33 ("net: phy: air_en8811h: add AN8811HB MCU assert/deassert support")
  dddfadd751 ("net: phy: Add Airoha phy library for shared code")
  5226bb6634 ("net: phy: air_phy_lib: Factorize BuckPBus register accessors")
  e08f0ea6da ("net: phy: Rename Airoha common BuckPBus register accessors")

net/sched/sch_netem.c
  a2f6ed7b48 ("net/sched: netem: add per-impairment extended statistics")
  9552b11e3e ("net/sched: fix packet loop on netem when duplicate is on")

Adjacent changes:

drivers/dpll/zl3073x/core.c
  c1224569ce ("dpll: zl3073x: make frequency monitor a per-device attribute")
  54e65df8cf ("dpll: zl3073x: report FFO as DPLL vs input reference offset")

net/iucv/af_iucv.c
  347fdd4df8 ("af_iucv: convert to getsockopt_iter")
  3589d20a66 ("net/iucv: fix locking in .getsockopt")

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-05-28 14:02:21 -07:00
Michael Riesch
804ed52335 Documentation: admin-guide: media: add rk3588 vicap 
Add a section that describes the Rockchip RK3588 VICAP.

Reviewed-by: Mehdi Djait <mehdi.djait@linux.intel.com>
Signed-off-by: Michael Riesch <michael.riesch@collabora.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
 2026-05-28 22:10:01 +03:00
Armin Wolf
73fa957a05
platform/x86: uniwill-laptop: Add support for battery charge modes 
Many Uniwill-based devices do not supports the already existing
charge limit functionality, but instead support an alternative
interface for controlling the battery charge algorithm.

Add support for this interface and update the documentation.

Reviewed-by: Werner Sembach <wse@tuxedocomputers.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://patch.msgid.link/20260512232145.329260-8-W_Armin@gmx.de
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
 2026-05-28 13:23:33 +03:00
Ilpo Järvinen
0129159fcc
Merge branch 'fixes' into for-next 
Merge uniwill driver fixes to the for-next branch to be able to continue
feature work there.
 2026-05-28 13:21:45 +03:00
Feng Tang
d5cae2261b dma-contiguous: simplify numa cma area handling 
Currently, there are 2 kernel cmdline ways to setup numa cma area:
"cma_pernuma=" and "numa_cma=", and there are 2 cma arrays as well,
while they have no difference technically. Robin suggested to cleanup
the code and only use one array [1], as "the apparent intent that
users only want one _or_ the other".

Simplify the code by only using one array to save the numa cma area.
And in rare case that a user really setup the 2 cmdline parameters
at the same time,  let the per-node specific size setting 'numa_cma='
take priority over the global numa cma setting.

Link[1]: https://lore.kernel.org/lkml/43c5301c-fe6a-41e4-9482-ccfc7b62f2a7@arm.com/

Suggested-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Feng Tang <feng.tang@linux.alibaba.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20260525015111.6267-1-feng.tang@linux.alibaba.com
 2026-05-28 10:11:45 +02:00
Borislav Petkov (AMD)
80501dff81 Documentation/arch/x86: Hide clearcpuid= 
This option was never meant to be used in production because it solely
clears the X86_FEATURE kernel-internal representation of what CPUID bits
it has detected and doesn't do any *proper* feature disablement like
clearing CR4.CET in the user shadow stack case, for example.

So remove its documentation so that it doesn't get used in production
and people get silly ideas. It is meant strictly for debugging; and if
a chicken bit for properly disabling a feature is warranted, then that
would need proper enablement.

No functional changes.

Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Mathias Krause <minipli@grsecurity.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://patch.msgid.link/20260520202508.160112-1-bp@kernel.org
 2026-05-26 05:37:20 +02:00
Costa Shulyupin
d7391997ea docs: sysctl/net: Remove ax25, netrom, rose entries 
These networking subsystems were removed in commit dd8d4bc28a
("net: remove ax25 and amateur radio (hamradio) subsystem"),
but the sysctl directory table still listed them.

Assisted-by: Claude:claude-opus-4-6
Signed-off-by: Costa Shulyupin <costa.shul@redhat.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260515180200.1490926-1-costa.shul@redhat.com>
 2026-05-25 14:31:44 -06:00
Linlin Zhang
f9f57971da dm-inlinecrypt: add support for hardware-wrapped keys 
Add support for hardware-wrapped encryption keys to the
dm-inlinecrypt target.

Introduce a new optional argument <key_type> to indicate
whether the provided key is a raw key or a hardware-wrapped
key. Based on this flag, the appropriate blk-crypto key type
is selected when initializing the key.

This allows dm-inlinecrypt to work with hardware that requires
keys to be wrapped and managed by the underlying inline
encryption engine.

Update the target argument parsing accordingly and pass the
key type to blk_crypto_init_key(). Documentation is also
updated to reflect the new parameter and usage.

Signed-off-by: Linlin Zhang <linlin.zhang@oss.qualcomm.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Fixes: e7f57d2c47 ("dm-inlinecrypt: add target for inline block device encryption")
 2026-05-25 17:56:56 +02:00
Danilo Krummrich
56785dcb2e Linux 7.1-rc5 
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Merge tag 'v7.1-rc5' into driver-core-next

We need the driver-core fixes in here as well to build on top of.

Signed-off-by: Danilo Krummrich <dakr@kernel.org>
 2026-05-25 02:40:57 +02:00
Uladzislau Rezki (Sony)
eceb659752 rcu: Latch normal synchronize_rcu() path on flood 
Currently, rcu_normal_wake_from_gp is only enabled by default
on small systems(<= 16 CPUs) or when a user explicitly set it
enabled.

Introduce an adaptive latching mechanism:
 * Track the number of in-flight synchronize_rcu() requests
   using a new rcu_sr_normal_count counter;

 * If the count reaches/exceeds RCU_SR_NORMAL_LATCH_THR(64),
   it sets the rcu_sr_normal_latched, reverting new requests
   onto the scaled wait_rcu_gp() path;

 * The latch is cleared only when the pending requests are fully
   drained(nr == 0);

 * Enables rcu_normal_wake_from_gp by default for all systems,
   relying on this dynamic throttling instead of static CPU
   limits.

Testing(synthetic flood workload):
  * Kernel version: 6.19.0-rc6
  * Number of CPUs: 1536
  * 60K concurrent synchronize_rcu() calls

Perf(cycles, system-wide):
  total cycles: 932020263832
  rcu_sr_normal_add_req(): 2650282811 cycles(~0.28%)

Perf report excerpt:
  0.01%  0.01%  sync_test/...  [k] rcu_sr_normal_add_req

Measured overhead of rcu_sr_normal_add_req() remained ~0.28%
of total CPU cycles in this synthetic stress test.

Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Tested-by: Samir M <samir@linux.ibm.com>
Suggested-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
 2026-05-24 09:40:08 +02:00
Ethan Nelson-Moore
05cb9529a4 char: applicom: remove low-quality, unused driver 
The applicom driver supports PCI Profibus cards from Applicom, later
acquired by Molex. It has severe coding style issues and has attracted
a number of bug and security fixes over the years, despite the fact
that no one appears to be using it. It was broken from at least the
beginning of Git history (Linux 2.6.12-rc2 in April 2005) until October
2008, when a fatal bug was fixed in commit bc20589bf1 ("applicom.c:
fix apparently-broken code in do_ac_read()"). In the commit message,
the author commented that no one they knew was able to test the change.
Since then, there have been no commits that indicate the driver is
being used. Later PCI and PCI-Express Applicom Profibus cards only
officially support Windows [1], and even the PCI-Express cards have
been discontinued [2]. Given all these factors, remove the driver to
reduce future maintenance workload.

[1] https://www.sarcitalia.it/file_upload/prodotti//PCIE1500S7_PFB_987651-3769_0876250001505823933.pdf
[2] https://us.rs-online.com/product/molex-woodhead-brad/112011-5026/70631928/

Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Acked-by: David Woodhouse <dwmw2@infradead.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://patch.msgid.link/20260503035824.24078-1-enelsonmoore@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2026-05-23 13:47:34 +02:00
Ethan Nelson-Moore
910394c74c net: arcnet: remove ISA and PCMCIA support; modernize documentation 
While ARCnet is still used in industrial environments, and cards are
still manufactured, it is unlikely anyone is still using it with ISA
and PCMCIA cards. Reduce future maintenance burden by removing all ISA
and PCMCIA ARCnet drivers and documentation related to them. Update
instructions for loading modules and passing parameters to work on
modern kernels and with the com20020_pci driver. Also take the
opportunity to document the rest of the module parameters, correct a
file path in Documentation/networking/arcnet.rst, and change a
reference to /etc/rc.inet1, which no longer exists, to refer to
ifconfig.

Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Link: https://patch.msgid.link/20260521001631.45434-4-enelsonmoore@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-05-22 17:20:56 -07:00
Linus Torvalds
59825bc9ce platform-drivers-x86 for v7.1-4 
Fixes and New HW Support
 
 - Add ACPI_HANDLE()/ACPI_COMPANION() NULL checks (many drivers) to
   handle match overrides gracefully
 
 - asus-armoury:
 
   - Fix mini-LED mode get/set
 
   - Add support for FA401EA, FX607VU, G614FR, and GU605CP
 
 - bitland-mifs-wmi: Add CONFIG_LEDS_CLASS dependency
 
 - hp-wmi: Add thermal support for Omen 16-c0xxx (board 8902)
 
 - intel/vsec: Fix enable_cnt imbalance due to PCIe error recovery
 
 - surface/aggregator_registry: Remove battery & AC nodes on Surface
 			       Laptop 7 to avoid duplicated devices
 
 - uniwill-laptop:
 
   - Handle uninitialized and invalid charging threshold values
 
   - Accept charging threshold of 0 through power supply sysfs ABI and
     clamp it to 1
 
   - Make 'force' parameter to work also when device descriptor is found
 
   - Do not enable charging limit despite the 'force' parameter to avoid
     permanent damage to battery
 
 The following is an automated shortlog grouped by driver:
 
 acer-wireless:
  -  Check ACPI_COMPANION() against NULL
 
 adv_swbutton:
  -  Check ACPI_HANDLE() against NULL
 
 asus-armoury:
  -  add support for FA401EA
  -  add support for FX607VU
  -  add support for G614FR
  -  add support for GU605CP
  -  fix mini-LED mode get/set on MODE2 devices
 
 asus-laptop:
  -  Check ACPI_COMPANION() against NULL
 
 bitland-mifs-wmi:
  -  add CONFIG_LEDS_CLASS dependency
 
 dell/dell-rbtn:
  -  Check ACPI_COMPANION() against NULL
 
 eeepc-laptop:
  -  Check ACPI_COMPANION() against NULL
 
 fujitsu:
  -  Check ACPI_COMPANION() against NULL
 
 fujitsu-tablet:
  -  Check ACPI_COMPANION() against NULL
 
 hp_accel:
  -  Check ACPI_COMPANION() against NULL
 
 hp-wmi:
  -  fix support for thermal profile Omen 16-с0xxx laptops
 
 intel-hid:
  -  Check ACPI_HANDLE() against NULL
 
 intel/rst:
  -  Check ACPI_COMPANION() against NULL
 
 intel_sar:
  -  Check ACPI_HANDLE() against NULL
 
 intel/smartconnect:
  -  Check ACPI_HANDLE() against NULL
 
 intel-vbtn:
  -  Check ACPI_HANDLE() against NULL
 
 intel/vsec:
  -  Fix enable_cnt imbalance on PCIe error recovery
 
 lg-laptop:
  -  Check ACPI_COMPANION() against NULL
 
 panasonic-laptop:
  -  Check ACPI_COMPANION() against NULL
 
 sony-laptop:
  -  Check ACPI_COMPANION() against NULL
 
 surface: aggregator_registry:
  -  omit battery & AC nodes on Surface Laptop 7
 
 surface: surfacepro3_button:
  -  Check ACPI_COMPANION()
 
 system76:
  -  Check ACPI_COMPANION() against NULL
 
 toshiba_acpi:
  -  Check ACPI_COMPANION() against NULL
 
 toshiba_bluetooth:
  -  Check ACPI_COMPANION() against NULL
 
 toshiba_haps:
  -  Check ACPI_COMPANION() against NULL
 
 uniwill-laptop:
  -  Accept charging threshold of 0
  -  Do not enable the charging limit even when forced
  -  Fix behavior of "force" module param
  -  Properly initialize charging threshold
 
 wireless-hotkey:
  -  Check ACPI_COMPANION() against NULL
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Merge tag 'platform-drivers-x86-v7.1-4' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

Pull x86 platform driver fixes from

 - Add ACPI_HANDLE()/ACPI_COMPANION() NULL checks (many drivers) to
   handle match overrides gracefully

 - asus-armoury:
    - Fix mini-LED mode get/set
    - Add support for FA401EA, FX607VU, G614FR, and GU605CP

 - bitland-mifs-wmi:
    - Add CONFIG_LEDS_CLASS dependency

 - hp-wmi:
    - Add thermal support for Omen 16-c0xxx (board 8902)

 - intel/vsec:
    - Fix enable_cnt imbalance due to PCIe error recovery

 - surface/aggregator_registry:
    - Remove battery & AC nodes on Surface Laptop 7 to avoid duplicated
      devices

 - uniwill-laptop:
    - Handle uninitialized and invalid charging threshold values
    - Accept charging threshold of 0 through power supply sysfs ABI and
      clamp it to 1
    - Make 'force' parameter to work also when device descriptor is
      found
    - Do not enable charging limit despite the 'force' parameter to
      avoid permanent damage to battery

* tag 'platform-drivers-x86-v7.1-4' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (35 commits)
  platform/x86: bitland-mifs-wmi: add CONFIG_LEDS_CLASS dependency
  platform/x86: wireless-hotkey: Check ACPI_COMPANION() against NULL
  platform/x86: toshiba_haps: Check ACPI_COMPANION() against NULL
  platform/x86: toshiba_bluetooth: Check ACPI_COMPANION() against NULL
  platform/x86: toshiba_acpi: Check ACPI_COMPANION() against NULL
  platform/x86: system76: Check ACPI_COMPANION() against NULL
  platform/x86: sony-laptop: Check ACPI_COMPANION() against NULL
  platform/x86: panasonic-laptop: Check ACPI_COMPANION() against NULL
  platform/x86: lg-laptop: Check ACPI_COMPANION() against NULL
  platform/x86: intel/smartconnect: Check ACPI_HANDLE() against NULL
  platform/x86: intel/rst: Check ACPI_COMPANION() against NULL
  platform/x86: fujitsu-tablet: Check ACPI_COMPANION() against NULL
  platform/x86: fujitsu: Check ACPI_COMPANION() against NULL
  platform/x86: eeepc-laptop: Check ACPI_COMPANION() against NULL
  platform/x86: dell/dell-rbtn: Check ACPI_COMPANION() against NULL
  platform/x86: asus-laptop: Check ACPI_COMPANION() against NULL
  platform/x86: acer-wireless: Check ACPI_COMPANION() against NULL
  platform/x86: asus-armoury: add support for GU605CP
  platform/x86: asus-armoury: add support for FA401EA
  platform/x86: asus-armoury: add support for G614FR
  ...
 2026-05-22 15:45:26 -07:00
Sean Young
6fb302d210 cpufreq: elanfreq: Drop support for AMD Elan SC4* 
Since commit 8b793a92d8 ("x86/cpu: Remove M486/M486SX/ELAN support"),
the AMD Elan SC4* is no longer supported, so the CPU frequency driver
is no longer needed.

Signed-off-by: Sean Young <sean@mess.org>
Reviewed-by: Zhongqiu Han <zhongqiu.han@oss.qualcomm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
[ rjw: Changelog tweaks ]
Link: https://patch.msgid.link/20260507090107.10113-1-sean@mess.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-05-22 18:42:19 +02:00
Pengjie Zhang
85524e651d cpufreq: Documentation: fix sampling_down_factor range 
The ondemand governor implementation accepts sampling_down_factor values
from 1 to 100000 via MAX_SAMPLING_DOWN_FACTOR, but the documentation in
admin-guide/pm/cpufreq.rst still says the valid range is 1 to 100.

Update the documentation to match the actual code.

Fixes: 2a0e492798 ("cpufreq: User/admin documentation update and consolidation")
Reviewed-by: Zhongqiu Han <zhongqiu.han@oss.qualcomm.com>
Signed-off-by: Pengjie Zhang <zhangpengjie2@huawei.com>
Link: https://patch.msgid.link/20260518133457.2408463-1-zhangpengjie2@huawei.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-05-22 17:32:11 +02:00
Rafael J. Wysocki
a67f311333 amd-pstate fixes for 7.1 (05/14/2026) 
A number of fixes to the dynamic epp feature which was new
 to kernel 7.1, including making it opt in only.
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Merge tag 'amd-pstate-v7.1-2026-05-14' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux into pm-cpufreq-fixes

Merge amd-pstate fixes for 7.1 (05/14/2026) from Mario Limonciello:

"A number of fixes to the dynamic epp feature which was new
 to kernel 7.1, including making it opt in only."

* tag 'amd-pstate-v7.1-2026-05-14' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux:
  cpufreq/amd-pstate: Drop Kconfig option for dynamic EPP
  cpufreq/amd-pstate-ut: Drop policy reference before driver switch
  cpufreq/amd-pstate: Use "epp_default_dc" as default when dynamic_epp is disabled
  cpufreq/amd-pstate: Reorder notifier unregistration and floor perf reset
  cpufreq/amd-pstate: Allow writes to dynamic_epp when state isn't modified
  cpufreq/amd-pstate: Return -ENOMEM on failure to allocate profile_name
  cpufreq/amd-pstate: Grab "amd_pstate_driver_lock" when toggling dynamic_epp
 2026-05-20 22:03:41 +02:00
Ethan Nelson-Moore
e38b27199e console: mdacon: remove this obsolete driver 
The mdacon driver supports using ISA MDA or Hercules-compatible display
adapters as a secondary text console. This was commonly used in the
1990s and earlier for debugging software which took over the primary
display. It is highly unlikely anyone is doing so nowadays because
serial consoles and much better methods of debugging exist.

The driver is not enabled by any defconfig, nor any of the
dozens of distro configs collected at [1]. It has been relegated to VTs
13-16 since commit 0b9cf3aa6b ("mdacon messing up default vc's - set
default to vc13-16 again") in Linux 2.6.27 (and before Linux 2.5.53 -
see the link in the message of the above commit). The change in 2.6.27
was done because it was incorrectly detecting non-MDA adapters as MDA
and taking over all VTs, rendering them unusable.

Furthermore, vgacon supports using MDA/Hercules-compatible adapters as
the primary text console, so any systems with only one of these
adapters were already using vgacon and will not experience any loss in
functionality from the removal of this driver.

Given all of these factors, the mdacon driver is likely entirely
unused. Remove it.

[1] f0bee86a13

Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Signed-off-by: Helge Deller <deller@gmx.de>
 2026-05-20 20:23:32 +02:00
Armin Wolf
26cbe119f9
platform/x86: uniwill-laptop: Do not enable the charging limit even when forced 
It seems that on some older models (~2020) the battery charging limit
can permanently damage the battery. Prevent users from enabling this
feature thru the "force" module parameter to avoid causing permanent
hardware damage on such devices.

Fixes: d050479693 ("platform/x86: Add Uniwill laptop driver")
Link: https://www.reddit.com/r/XMG_gg/comments/ld9yyf/battery_limit_hidden_function_discovered_on/
Reviewed-by: Werner Sembach <wse@tuxedocomputers.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://patch.msgid.link/20260512232145.329260-5-W_Armin@gmx.de
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
 2026-05-19 16:52:49 +03:00
Mika Westerberg
af8922ffb3 docs: admin-guide: thunderbolt: Add instructions how to use USB4STREAM 
Add instructions how USB4STREAM can be configured and used.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
 2026-05-19 14:20:19 +02:00
Peter Zijlstra
a26d9208c1 Merge branch 'sched/cache' 
Merge the cache aware balancer topic branch.

# Conflicts:
#	kernel/sched/topology.c
 2026-05-19 12:18:01 +02:00
Linlin Zhang
5256a62f16 dm: add documentation for dm-inlinecrypt target 
This adds the admin-guide documentation for dm-inlinecrypt.

dm-inlinecrypt.rst is the guide to using dm-inlinecrypt.

Signed-off-by: Linlin Zhang <linlin.zhang@oss.qualcomm.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
 2026-05-18 14:26:27 +02:00
Cheng-Han Wu
e27108800b docs: admin-guide: add IGNORE_DIRS example for cscope 
The workload tracing guide shows how to build a cscope database by
running cscope command directly. The kernel build system also provides
a cscope target, which supports IGNORE_DIRS for excluding directories
from the generated database.

Mention make cscope and show how to exclude Documentation/ as an example.

Signed-off-by: Cheng-Han Wu <hank20010209@gmail.com>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260503101429.254394-5-hank20010209@gmail.com>
 2026-05-15 08:48:28 -06:00
Cheng-Han Wu
7fb658ede0 docs: admin-guide: clarify perf bench all behavior 
The workload tracing guide lists a fixed set of benchmarks for
"perf bench all". This list is stale and can become outdated when
perf adds, removes, or renames benchmark collections or individual
benchmarks.

Describe "perf bench all" as running all available benchmarks in the perf
bench framework instead. Also document how to list the collections and
benchmarks available on a given system.

Signed-off-by: Cheng-Han Wu <hank20010209@gmail.com>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260503101429.254394-4-hank20010209@gmail.com>
 2026-05-15 08:48:28 -06:00
Cheng-Han Wu
6e13c0aac6 docs: admin-guide: fix stress-ng command examples 
The workload tracing guide includes stress-ng command examples with a
stray "command." word at the end. This makes the examples invalid if they
are copied and run directly.

Remove the stray word from the stress-ng example. Also use "--" in the
perf record example to clearly separate perf record options from the
workload command being recorded.

Signed-off-by: Cheng-Han Wu <hank20010209@gmail.com>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260503101429.254394-3-hank20010209@gmail.com>
 2026-05-15 08:48:28 -06:00
Cheng-Han Wu
d848b1b099 docs: admin-guide: fix typos in workload tracing guide 
Fix several typos in the workload tracing guide:

  - sys_opennat() -> sys_openat()
  - annotate the to view -> annotate the output to view
  - sys_getegid -> sys_getegid()

Signed-off-by: Cheng-Han Wu <hank20010209@gmail.com>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260503101429.254394-2-hank20010209@gmail.com>
 2026-05-15 08:48:28 -06:00
Jinjie Ruan
f5899ff9c4 docs: Update nosmt support for arm64 
commit eed4583bcf ("arm64: Kconfig: Enable HOTPLUG_SMT") enable
HOTPLUG_SMT for SMT control for arm64, but the documentation was
not updated accordingly to reflect that ARM64 now supports control SMT
via boot parameter and sysfs knobs:

1. Boot parameters:

nosmt:          Disable SMT, can be enabled via sysfs knobs.
nosmt=force:    Disable SMT, cannot be enabled via sysfs knobs.

2. Runtime sysfs controls:

Write "on", "off", "forceoff" or the number of SMT threads (1, 2, ...)
to /sys/devices/system/cpu/smt/control.

Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260417032540.3720627-1-ruanjinjie@huawei.com>
 2026-05-15 08:26:31 -06:00
Chen-Shi-Hong
8d624d687d docs: reporting-issues: replace "these advices" with "all of this advice" 
"Advice" is an uncountable noun, so "these advices" is grammatically
incorrect.

Replace it with "all of this advice" instead, which keeps the sentence
grammatical while also making it clear that it refers to the full set of
recommendations in the paragraph.

Signed-off-by: Chen-Shi-Hong <eric039eric@gmail.com>
Reviewed-by: WangYuli <wangyl5933@chinaunicom.cn>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260514082808.655-1-eric039eric@gmail.com>
 2026-05-15 07:55:51 -06:00
Tao Cui
4376352f2c cgroup/rdma: document rdma.peak, rdma.events and rdma.events.local 
Add interface file documentation for the new rdma cgroup files to
Documentation/admin-guide/cgroup-v2.rst.

Signed-off-by: Tao Cui <cuitao@kylinos.cn>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2026-05-14 11:22:55 -10:00
Mario Limonciello
e4e9b7b38d cpufreq/amd-pstate: Drop Kconfig option for dynamic EPP 
There are some performance issues being identified by dynamic EPP
and we don't want to have distributions turning it on by default
exposing them to users at this time.

Drop the kconfig option, and require an explicit opt in from kernel
command line or runtime sysfs option to turn it on.

Reported-by: Viktor Jägersküpper <viktor_jaegerskuepper@freenet.de>
Closes: https://lore.kernel.org/linux-pm/14a87c99-785c-4b16-bfce-35ecbf053448@freenet.de/
Reported-by: Stuart Meckle <stuartmeckle@gmail.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=221473
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: K Prateek Nayak <kprateek.nayak@amd.com>
Link: https://lore.kernel.org/r/20260512221947.1652988-1-mario.limonciello@amd.com
(fix sysfs file path)
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
 2026-05-14 08:47:48 -05:00
Ricardo Neri
ee047fc7a2 Documentation: intel_pstate: Fix description of asymmetric packing with SMT 
Patchset [1], including commits

 046a5a95c3 ("x86/sched/itmt: Give all SMT siblings of a core the same priority")
 995998ebde ("x86/sched: Remove SD_ASYM_PACKING from the SMT domain flags")

overhauled asym_packing handling in the scheduler on x86 hybrid
processors with SMT. It removed SD_ASYM_PACKING from the x86 SMT
scheduling domain and made all SMT siblings of a core share the same
priority. As a result, asym_packing operates only across physical
cores, spreading tasks among them and only using idle SMT siblings
once all physical cores are busy.

Fix the documentation to reflect this behavior.

Fixes: f20af84c29 ("cpufreq: intel_pstate: Document hybrid processor support")
Link: https://lore.kernel.org/r/20230406203148.19182-1-ricardo.neri-calderon@linux.intel.com [1]
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
[ rjw: Changelog edits ]
Link: https://patch.msgid.link/20260424-rneri-fix-intel-pstate-doc-smt-asym-packing-v1-1-317bf7d5c362@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-05-13 21:39:38 +02:00
Ingo Molnar
d8b55ce0c9 x86/fpu: Remove the 'no387' boot option 
Without math emulation there's no point to this option.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Ahmed S. Darwish <darwi@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20250425084216.3913608-10-mingo@kernel.org
 2026-05-08 07:34:03 +02:00
Jakub Kicinski
6a4c4656b0 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 
Cross-merge networking fixes after downstream PR (net-7.1-rc3).

Conflicts:

net/ipv4/igmp.c
  726fa7da2d ("ipv4: igmp: get rid of IGMPV3_{QQIC,MRC} and simplify calculation")
  c6bebaa744 ("ipv4: igmp: annotate data-races in igmp_heard_query()")
https://lore.kernel.org/a7365e4873340f7a5e30411207de3bf9@kernel.org

Adjacent changes:

net/psp/psp_main.c
  30cb24f97d ("psp: strip variable-length PSP header in psp_dev_rcv()")
  c2b22277ad ("psp: validate IPv4 header fields in psp_dev_rcv()")

net/sched/sch_fq_codel.c
  f83e07b292 ("net/sched: sch_fq_codel: annotate data-races from fq_codel_dump_class_stats()")
  3f3aa77ff1 ("net/sched: add qstats_cpu_drop_inc() helper")

net/wireless/pmsr.c
  0f3c0a1973 ("wifi: nl80211: fix NL80211_PMSR_FTM_REQ_ATTR_FTMS_PER_BURST usage")
  410aa47fd9 ("wifi: cfg80211: allow suppressing FTM result reporting for PD requests")

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-05-07 11:19:07 -07:00
Bin Du
3cd9b70115 Documentation: add documentation of AMD isp 4 driver 
Add documentation for AMD ISP 4 and describe the main components

Co-developed-by: Svetoslav Stoilov <Svetoslav.Stoilov@amd.com>
Signed-off-by: Svetoslav Stoilov <Svetoslav.Stoilov@amd.com>
Signed-off-by: Bin Du <Bin.Du@amd.com>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: Sultan Alsawaf <sultan@kerneltoast.com>
Tested-by: Alexey Zagorodnikov <xglooom@gmail.com>
Tested-by: Kate Hsuan <hpa@redhat.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
 2026-05-06 13:48:10 +03:00
Maciej Wieczor-Retman
6cf1c1e9f2
platform/x86/intel-uncore-freq: Expose instance ID in the sysfs 
Insufficient data is exported to allow direct access to TPMI registers
through MMIO. On non-partitioned systems domain_id can be used both for
mapping CPUs to their compute die IDs and for mapping die indices to
their MMIO memory blocks presented to userspace via TPMI debugfs.
However on partitioned systems the debugfs association doesn't work
anymore. This is due to how TPMI partitioning influences domain_id
calculation. The previous association is lost on partitioned systems in
order to keep using domain_id for mapping CPUs to compute dies.

Expose the instance ID in sysfs that's unique in the scope of one TPMI
partition (and hence one TPMI device). It's a physical index into mapped
MMIO blocks and can be used by userspace to figure out how to directly
access TPMI registers.

Signed-off-by: Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://patch.msgid.link/b9ae8d5f1ab86bcdb1a8636fa48865a9e49e2e21.1775665057.git.m.wieczorretman@pm.me
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
 2026-05-06 13:36:50 +03:00
Linus Torvalds
11f00074f7 cgroup: Fixes for v7.1-rc2 
- During v6.19, cgroup task unlink was moved from do_exit() to after the
   final task switch to satisfy a controller invariant. That left the kernel
   seeing tasks past exit_signals() longer than userspace expected, and
   several v7.0 follow-ups tried to bridge the gap by making rmdir wait for
   the kernel side. None held up. The latest is an A-A deadlock when rmdir
   is invoked by the reaper of zombies whose pidns teardown the rmdir itself
   is waiting on, which points at the synchronizing approach being
   fundamentally wrong:
 
   - Take a different approach: drop the wait, leave rmdir's user-visible
     side returning as soon as cgroup.procs is empty, and defer the css
     percpu_ref kill that drives ->css_offline() until the cgroup is fully
     depopulated.
 
   - Tagged for stable. Somewhat invasive but contained. The hope is that
     fixing forward sticks. If not, the fallback is to revert the entire
     chain and rework on the development branch.
 
   - Doesn't plug a pre-existing analogous race in
     cgroup_apply_control_disable() (controller disable via subtree_control).
     Not a regression. The development branch will do the more invasive
     restructuring needed for that.
 
 - Documentation update for cgroup-v1 charge-commit section that still
   referenced functions removed when the memcg hugetlb try-commit-cancel
   protocol was retired.
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Merge tag 'cgroup-for-7.1-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

Pull cgroup fixes from Tejun Heo:

 - During v6.19, cgroup task unlink was moved from do_exit() to after the
   final task switch to satisfy a controller invariant. That left the kernel
   seeing tasks past exit_signals() longer than userspace expected, and
   several v7.0 follow-ups tried to bridge the gap by making rmdir wait for
   the kernel side. None held up.

   The latest is an A-A deadlock when rmdir is invoked by the reaper of
   zombies whose pidns teardown the rmdir itself is waiting on, which
   points at the synchronizing approach being fundamentally wrong.

   Take a different approach: drop the wait, leave rmdir's user-visible
   side returning as soon as cgroup.procs is empty, and defer the css
   percpu_ref kill that drives ->css_offline() until the cgroup is fully
   depopulated.

   Tagged for stable. Somewhat invasive but contained. The hope is that
   fixing forward sticks. If not, the fallback is to revert the entire
   chain and rework on the development branch.

   Note that this doesn't plug a pre-existing analogous race in
   cgroup_apply_control_disable() (controller disable via
   subtree_control). Not a regression. The development branch will do
   the more invasive restructuring needed for that.

 - Documentation update for cgroup-v1 charge-commit section that still
   referenced functions removed when the memcg hugetlb try-commit-cancel
   protocol was retired.

* tag 'cgroup-for-7.1-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  docs: cgroup-v1: Update charge-commit section
  cgroup: Defer css percpu_ref kill on rmdir until cgroup is depopulated
 2026-05-05 15:43:32 -07:00
T.J. Mercier
d8769544bd docs: cgroup-v1: Update charge-commit section 
Commit 1d8f136a42 ("memcg/hugetlb: remove memcg hugetlb
try-commit-cancel protocol") removed mem_cgroup_commit_charge() and
mem_cgroup_cancel_charge(), but the docs still refer to those functions.
There is no longer any charge cancellation.

Update the docs to match the code.

Signed-off-by: T.J. Mercier <tjmercier@google.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2026-05-04 11:02:12 -10:00
Sebastian Andrzej Siewior
75ff0feaa2 Documentation/kernel-parameters: Remove "Deprecated" from isolcpus= 
The isolcpus= option has been marked as deprecated in 2017. Back then it
was desired for the domain sub option to be configured dynamically at
runtime instead using this boot command line which provides a static
configuration. In the meantime this option was extended by other sub
options which don't have runtime counterpart or it does not make sense
to provide one.

The deprecated part always referred to the default `domain' sub option
but it was not obvious. Also the reasoning behind the deprecation is
sort of dubious: There is nothing wrong with a static configuration if
there is no desired to reconfigure. This is useful on systems which
have one purpose and the CPU partition configuration is not changed for
the entire lifetime.

Remove the "Deprecated" note. Remove the part of the description which
suggest to use cpuset.sched_load_balance and instead point to the
documentation file which explains how to use cpusets to configure this
at runtime.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Waiman Long <longman@redhat.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260427150739.bwVmmkj2@linutronix.de>
 2026-05-03 09:09:15 -06:00
Costa Shulyupin
cb7083f9db docs: Remove stale ISDN parameters 
The icn= and pcbit= parameters referenced drivers removed in
commit 02bbd9802d ("staging: i4l: delete the whole thing").

Remove the stale parameter entries and the now-unused ISDN tag
from the legend.

Suggested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Costa Shulyupin <costa.shul@redhat.com>
Assisted-by: Claude:claude-opus-4-6
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260502120206.1289126-1-costa.shul@redhat.com>
 2026-05-03 08:36:03 -06:00
Arnd Bergmann
4fe18ddd17 ne2k: fold drivers/net/Space.c into ne.c 
drivers/net/Space.c is the last remnant of the linux-2.4.x driver model
that required each subsystem and device driver init function to be called
from init/main.c explicitly, before the introduction of initcall levels.

In linux-7.0, this was only used for a handful of ISA network drivers,
with the ne2000 driver being the last one.

Fold the code into ne.c directly, with minimal changes to preserve
the existing command line parsing.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> # m68k
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260429145624.2948432-2-arnd@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-05-01 16:46:53 -07:00
Hans de Goede
c9447f1013 Documentation: update deferred_probe_timeout cmdline parameter documentation 
Extend the deferred_probe_timeout cmdline parameter documentation,
documenting that negative values are treated as an infinite timeout value.

Suggested-by: Danilo Krummrich <dakr@kernel.org>
Signed-off-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Link: https://patch.msgid.link/20260416144144.54547-1-johannes.goede@oss.qualcomm.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
 2026-04-28 23:51:49 +02:00
Linus Torvalds
3b3bea6d4b cgroup: Fixes for v7.1-rc1 
- Fix UAF race in psi pressure_write() against cgroup file release by
   extending cgroup_mutex coverage and ordering of->priv access after
   cgroup_kn_lock_live().
 
 - Fix integer overflow in rdmacg_try_charge() when usage equals INT_MAX
   by performing the increment in s64.
 
 - Fix asymmetric DL bandwidth accounting on cpuset attach rollback by
   recording the CPU used by dl_bw_alloc() so cancel_attach() returns
   the reservation to the same root domain.
 
 - Fix nr_dying_subsys_* race that briefly showed 0 in cgroup.stat after
   rmdir by incrementing from kill_css() instead of offline_css().
 
 - Typo fix in cgroup-v2 documentation.
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Merge tag 'cgroup-for-7.1-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

Pull cgroup fixes from Tejun Heo:

 - Fix UAF race in psi pressure_write() against cgroup file release by
   extending cgroup_mutex coverage and ordering of->priv access after
   cgroup_kn_lock_live()

 - Fix integer overflow in rdmacg_try_charge() when usage equals INT_MAX
   by performing the increment in s64

 - Fix asymmetric DL bandwidth accounting on cpuset attach rollback by
   recording the CPU used by dl_bw_alloc() so cancel_attach() returns
   the reservation to the same root domain

 - Fix nr_dying_subsys_* race that briefly showed 0 in cgroup.stat after
   rmdir by incrementing from kill_css() instead of offline_css()

 - Typo fix in cgroup-v2 documentation

* tag 'cgroup-for-7.1-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  docs: cgroup: fix typo 'protetion' -> 'protection'
  cgroup: Increment nr_dying_subsys_* from rmdir context
  cgroup/cpuset: record DL BW alloc CPU for attach rollback
  cgroup/rdma: fix integer overflow in rdmacg_try_charge()
  sched/psi: fix race between file release and pressure write
 2026-04-27 16:51:27 -07:00
Petr Vaněk
981cd33861 docs: cgroup: fix typo 'protetion' -> 'protection' 
Fix a small typo in the description of the memory_hugetlb_accounting
mount option.

Signed-off-by: Petr Vaněk <arkamar@atlas.cz>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2026-04-27 07:55:40 -10:00
Charlie Jenkins
49984b903a Documentation/binfmt-misc.rst: Specify aux vector for "O" flag description 
Instead of replacing the file path in the argument vector, the file
descriptor is passed as AT_EXECFD in the auxilary vector. This appears
to have been the case at least since the git port, update the
documentation to reflect this.

Signed-off-by: Charlie Jenkins <thecharlesjenkins@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260418-binfmt_misc_doc_update-v1-1-c2e9601ab868@gmail.com>
 2026-04-27 03:58:19 -06:00
Linus Torvalds
64edfa6506 Delete some obsolete networking code 
Old code like amateur radio and NFC have long been a burden
 to core networking developers. syzbot loves to find bugs
 in BKL-era code, and noobs try to fix them.
 
 If we want to have a fighting chance of surviving the LLM-pocalypse
 this code needs to find a dedicated owner or get deleted.
 We've talked about these deletions multiple times in the past
 and every time someone wanted the code to stay. It is never
 very clear to me how many of those people actually use the code
 vs are just nostalgic to see it go. Amateur radio did have
 occasional users (or so I think) but most users switched
 to user space implementations since its all super slow stuff.
 Nobody stepped up to maintain the kernel code.
 
 We were lucky enough to find someone who wants to help with NFC
 so we're giving that a chance. Let's try to put the rest of
 this code behind us.
 
 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-deletions' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking deletions from Jakub Kicinski:
 "Delete some obsolete networking code

  Old code like amateur radio and NFC have long been a burden to core
  networking developers. syzbot loves to find bugs in BKL-era code, and
  noobs try to fix them.

  If we want to have a fighting chance of surviving the LLM-pocalypse
  this code needs to find a dedicated owner or get deleted. We've talked
  about these deletions multiple times in the past and every time
  someone wanted the code to stay. It is never very clear to me how many
  of those people actually use the code vs are just nostalgic to see it
  go. Amateur radio did have occasional users (or so I think) but most
  users switched to user space implementations since its all super slow
  stuff. Nobody stepped up to maintain the kernel code.

  We were lucky enough to find someone who wants to help with NFC so
  we're giving that a chance. Let's try to put the rest of this code
  behind us"

* tag 'net-deletions' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next:
  drivers: net: 8390: wd80x3: Remove this driver
  drivers: net: 8390: ultra: Remove this driver
  drivers: net: 8390: AX88190: Remove this driver
  drivers: net: fujitsu: fmvj18x: Remove this driver
  drivers: net: smsc: smc91c92: Remove this driver
  drivers: net: smsc: smc9194: Remove this driver
  drivers: net: amd: nmclan: Remove this driver
  drivers: net: amd: lance: Remove this driver
  drivers: net: 3com: 3c589: Remove this driver
  drivers: net: 3com: 3c574: Remove this driver
  drivers: net: 3com: 3c515: Remove this driver
  drivers: net: 3com: 3c509: Remove this driver
  net: packetengines: remove obsolete yellowfin driver and vendor dir
  net: packetengines: remove obsolete hamachi driver
  net: remove unused ATM protocols and legacy ATM device drivers
  net: remove ax25 and amateur radio (hamradio) subsystem
  net: remove ISDN subsystem and Bluetooth CMTP
  caif: remove CAIF NETWORK LAYER
 2026-04-24 09:41:58 -07:00
Jakub Kicinski
dd8d4bc28a net: remove ax25 and amateur radio (hamradio) subsystem 
Remove the amateur radio (AX.25, NET/ROM, ROSE) protocol implementation
and all associated hamradio device drivers from the kernel tree.
This set of protocols has long been a huge bug/syzbot magnet,
and since nobody stepped up to help us deal with the influx
of the AI-generated bug reports we need to move it out of tree
to protect our sanity.

The code is moved to an out-of-tree repo:
https://github.com/linux-netdev/mod-orphan
if it's cleaned up and reworked there we can accept it back.

Minimal stub headers are kept for include/net/ax25.h (AX25_P_IP,
AX25_ADDR_LEN, ax25_address) and include/net/rose.h (ROSE_ADDR_LEN)
so that the conditional integration code in arp.c and tun.c continues
to compile and work when the out-of-tree modules are loaded.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Carlos Bilbao <carlos.bilbao@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Acked-by: Toke Høiland-Jørgensen <toke@toke.dk>
Link: https://patch.msgid.link/20260421021824.1293976-1-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
 2026-04-23 10:24:02 -07:00
Linus Torvalds
da6b5aae84 platform-drivers-x86 for v7.1-1 
Highlights:
 
 - asus-wmi:
   - Retain battery charge threshold during boot which avoids unsolicited
     change to 100%. Return -ENODATA when the limit is not yet known
   - Improve screenpad power/brightness handling consistency
   - Fix screenpad brightness range
 
 - barco-p50-gpio: Normalize gpio_get return values
 
 - bitland-mifs-wmi: Add driver for Bitland laptops (supports platform
                     profile,hwmon, kbd backlight, gpu mode, hotkeys, and
                     fan boost)
 
 - dell_rbu: Fix using uninitialized value in sysfs write function
 
 - dell-wmi-sysman: Respect destination length when constructing enum
                    strings
 
 - hp-wmi:
   - Propagate fan setting apply failures and log an error
   - Fix sysfs write vs work handler cancel_delayed_work_sync() deadlock
   - Correct keepalive schedule_delayed_work() to mod_delayed_work()
   - Fix u8 underflows in GPU delta calculation
   - Use mutex to protect fan pwm/mode
   - Ignore kbd backlight and FnLock key events that are handled by FW
   - Fix fan table parsing (use correct field)
   - Add support for Omen 14-fb0xxx, 16-n0xxx, 16-wf1xxx, and Omen MAX
     16-ak0xxxx
 
 - input: trackpoint & thinkpad_acpi: Enable doubletap by default and
                                      add sysfs enable/disable
 
 - int3472: Add support for GPIO type 0x02 (IR flood LED)
 
 - intel-speed-select: (updated to v1.26)
   - Avoid using current base frequency as maximum
   - Fix CPU extended family ID decoding
   - Fix exit code
   - Improve error reporting
 
 - intel/vsec: Refactor to support ACPI-enumerated PMT endpoints.
 
 - pcengines-apuv2: Attach software node to the gpiochip
 
 - uniwill:
   - Refactor hwmon to smaller parts to accomodate HW diversity
   - Support USB-C power/performance priority switch through sysfs
   - Add another XMG Fusion 15 (L19) DMI vendor
   - Enable fine-grained features to device lineup mapping
 
 - wmi: Perform output size check within WMI core to allow simpler WMI
        drivers
 
 - acpi_driver -> platform driver conversions (a large number of changes
   from Rafael J. Wysocki)
 
 - Miscellaneous cleanups / refactoring / improvements
 
 The following is an automated shortlog grouped by driver:
 
 acer-wireless:
  -  Convert ACPI driver to a platform one
  -  Register ACPI notify handler directly
 
 asus-laptop:
  -  Convert ACPI driver to a platform one
  -  Register ACPI notify handler directly
 
 asus-wireless:
  -  Convert ACPI driver to a platform one
  -  Register ACPI notify handler directly
 
 asus-wmi:
  -  adjust screenpad power/brightness handling
  -  do not enforce a battery charge threshold
  -  fix screenpad brightness range
 
 barco-p50-gpio:
  -  convert to guard() notation
  -  normalize return value of gpio_get
 
 bitland-mifs-wmi:
  -  Add new Bitland MIFS WMI driver
 
 dell/dell-rbtn:
  -  Convert ACPI driver to a platform one
  -  Register ACPI notify handler directly
 
 dell_rbu:
  -  avoid uninit value usage in packet_size_write()
 
 dell-wmi-sysman:
  -  bound enumeration string aggregation
  -  Clean up security buffer helpers
  -  Fix typo in function comment
  -  Use standard kobj_sysfs_ops
  -  Use sysfs_emit{_at} in show functions
 
 Documentation: laptops:
  -  Update documentation for uniwill laptops
 
 Documentation:
  -  thinkpad-acpi - Document doubletap_enable attribute
 
 eeepc-laptop:
  -  Convert ACPI driver to a platform one
  -  Register ACPI notify handler directly
 
 fujitsu:
  -  Convert backlight driver to a platform one
  -  Convert laptop driver to a platform one
  -  Register ACPI notify handlers directly
  -  Reorder code to avoid forward declarations
 
 fujitsu-tablet:
  -  Convert ACPI driver to a platform one
 
 hp-wmi:
  -  add locking for concurrent hwmon access
  -  add Omen 14-fb0xxx (board 8C58) support
  -  Add support for Omen 16-n0xxx (8A44)
  -  Add support for Omen 16-wf1xxx (8C77)
  -  Add support for OMEN MAX 16-ak0xxx (8D87)
  -  avoid cancel_delayed_work_sync from work handler
  -  fix fan table parsing
  -  fix ignored return values in fan settings
  -  fix u8 underflow in gpu_delta calculation
  -  Ignore backlight and FnLock events
  -  use mod_delayed_work to reset keep-alive timer
 
 input:
  -  trackpoint - Enable doubletap by default on capable devices
 
 int3472:
  -  Add support for GPIO type 0x02 (IR flood LED)
  -  Parameterize LED con_id in registration
  -  Rename pled to led in LED registration code
  -  Use local variable for LED struct access
 
 intel/rst:
  -  Convert ACPI driver to a platform one
 
 intel/smartconnect:
  -  Convert ACPI driver to a platform one
 
 intel/tpmi:
  -  Use 32 bit aligned address for debugfs mem write
 
 intel/vsec:
  -  Decouple add/link helpers from PCI
  -  Make driver_data info const
  -  Plumb ACPI PMT discovery tables through vsec
  -  Refactor base_addr handling
  -  Return real error codes from registration path
  -  Switch exported helpers from pci_dev to device
 
 lg-laptop:
  -  Convert ACPI driver to a platform one
  -  Drop debug-only ACPI notify handler
 
 nvsw-sn2201:
  -  Drop unused include
 
 panasonic-laptop:
  -  Convert ACPI driver to a platform one
  -  Fix OPTD notifier registration and cleanup
  -  Make pcc_register_optd_notifier() void
  -  Register ACPI notify handler directly
  -  Remove redundant checks from 3 functions
 
 pcengines-apuv2:
  -  attach software node to the gpiochip
 
 sony-laptop:
  -  Convert NC driver to a platform one
  -  Convert PIC driver to a platform one
  -  Register ACPI notify handler directly
 
 surface: hotplug:
  -  Correct inclusion for GPIO APIs
 
 surface: surfacepro3_button:
  -  Convert to a platform driver
  -  Drop wakeup source on remove
  -  Register ACPI notify handler
 
 system76:
  -  Convert ACPI driver to a platform one
  -  Drop redundant devm_led_classdev_unregister()
  -  Register ACPI notify handler directly
 
 thinkpad_acpi:
  -  Add sysfs control for TrackPoint double-tap
  -  Drop ACPI driver registration
  -  remove obsolete TODO comment
  -  use seq_puts() instead of seq_printf()
 
 tools/power/x86/intel-speed-select:
  -  Avoid current base freq as maximum
  -  Fix cpu extended family ID decoding
  -  Fix output when running on unsupported CLX platforms
  -  Fix some program return value
  -  Print Version info when Incompatible API version is detected
  -  v1.26 release
 
 topstar-laptop:
  -  Convert ACPI driver to a platform one
  -  Register ACPI notify handler directly
 
 toshiba_acpi:
  -  Convert ACPI driver to a platform one
  -  Register ACPI notify handler directly
  -  Reorder code to avoid forward declaration
 
 toshiba_bluetooth:
  -  Convert ACPI driver to a platform one
  -  Register ACPI notify handler directly
 
 toshiba_haps:
  -  Convert ACPI driver to a platform one
  -  Register ACPI notify handler directly
 
 uniwill-laptop:
  -  Apply features across all TUXEDO devices
  -  Fix signedness bug
  -  Fix XMG Fusion 15 (L19) entries
  -  Implement USB-C power priority setting
  -  Rework hwmon feature defines
 
 wireless-hotkey:
  -  Convert ACPI driver to a platform one
  -  Register ACPI notify handler directly
 
 wmi:
  -  Add wmidev_invoke_procedure()
  -  Convert drivers to use wmidev_invoke_procedure()
  -  Extend wmidev_invoke_method() to reject undersized data
  -  Extend wmidev_query_block() to reject undersized data
  -  Prepare to reject undersized unmarshalling results
  -  Replace .no_notify_data with .min_event_size
 
 x86:
  -  remove unnecessary module_init/exit() functions
 
 Merges:
  -  Merge branch 'intel-sst' of https://github.com/spandruvada/linux-kernel into review-ilpo-next
  -  Merge tag 'fixes' into 'for-next'
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Merge tag 'platform-drivers-x86-v7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

Pull x86 platform driver updates from Ilpo Järvinen:
 "asus-wmi:
   - Retain battery charge threshold during boot which avoids
     unsolicited change to 100%. Return -ENODATA when the limit
     is not yet known
   - Improve screenpad power/brightness handling consistency
   - Fix screenpad brightness range

  barco-p50-gpio:
   - Normalize gpio_get return values

  bitland-mifs-wmi:
   - Add driver for Bitland laptops (supports platform profile,
     hwmon, kbd backlight, gpu mode, hotkeys, and fan boost)

  dell_rbu:
   - Fix using uninitialized value in sysfs write function

  dell-wmi-sysman:
   - Respect destination length when constructing enum strings

  hp-wmi:
   - Propagate fan setting apply failures and log an error
   - Fix sysfs write vs work handler cancel_delayed_work_sync() deadlock
   - Correct keepalive schedule_delayed_work() to mod_delayed_work()
   - Fix u8 underflows in GPU delta calculation
   - Use mutex to protect fan pwm/mode
   - Ignore kbd backlight and FnLock key events that are handled by FW
   - Fix fan table parsing (use correct field)
   - Add support for Omen 14-fb0xxx, 16-n0xxx, 16-wf1xxx, and
     Omen MAX 16-ak0xxxx

  input: trackpoint & thinkpad_acpi:
   - Enable doubletap by default and add sysfs enable/disable

  int3472:
   - Add support for GPIO type 0x02 (IR flood LED)

  intel-speed-select: (updated to v1.26)
   - Avoid using current base frequency as maximum
   - Fix CPU extended family ID decoding
   - Fix exit code
   - Improve error reporting

  intel/vsec:
   - Refactor to support ACPI-enumerated PMT endpoints.

  pcengines-apuv2:
   - Attach software node to the gpiochip

  uniwill:
   - Refactor hwmon to smaller parts to accomodate HW diversity
   - Support USB-C power/performance priority switch through sysfs
   - Add another XMG Fusion 15 (L19) DMI vendor
   - Enable fine-grained features to device lineup mapping

  wmi:
   - Perform output size check within WMI core to allow simpler WMI
     drivers

  misc:
   - acpi_driver -> platform driver conversions (a large number of
     changes from Rafael J. Wysocki)
   - cleanups / refactoring / improvements"

* tag 'platform-drivers-x86-v7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (106 commits)
  platform/x86: hp-wmi: Add support for Omen 16-wf1xxx (8C77)
  platform/x86: hp-wmi: Add support for Omen 16-n0xxx (8A44)
  platform/x86: hp-wmi: Add support for OMEN MAX 16-ak0xxx (8D87)
  platform/x86: hp-wmi: fix fan table parsing
  platform/x86: hp-wmi: add Omen 14-fb0xxx (board 8C58) support
  platform/wmi: Replace .no_notify_data with .min_event_size
  platform/wmi: Extend wmidev_query_block() to reject undersized data
  platform/wmi: Extend wmidev_invoke_method() to reject undersized data
  platform/wmi: Prepare to reject undersized unmarshalling results
  platform/wmi: Convert drivers to use wmidev_invoke_procedure()
  platform/wmi: Add wmidev_invoke_procedure()
  platform/x86: int3472: Add support for GPIO type 0x02 (IR flood LED)
  platform/x86: int3472: Parameterize LED con_id in registration
  platform/x86: int3472: Rename pled to led in LED registration code
  platform/x86: int3472: Use local variable for LED struct access
  platform/x86: thinkpad_acpi: remove obsolete TODO comment
  platform/x86: dell-wmi-sysman: bound enumeration string aggregation
  platform/x86: hp-wmi: Ignore backlight and FnLock events
  platform/x86: uniwill-laptop: Fix signedness bug
  platform/x86: dell_rbu: avoid uninit value usage in packet_size_write()
  ...
 2026-04-20 12:02:24 -07:00
Linus Torvalds
36d179fd6b NFSD 7.1 Release Notes 
Benjamin Coddington contributed filehandle signing to defend against
 filehandle-guessing attacks. The server now appends a SipHash-2-4
 MAC to each filehandle when the new "sign_fh" export option is
 enabled. NFSD then verifies filehandles received from clients
 against the expected MAC; mismatches return NFS error STALE.
 
 Chuck Lever converted the entire NLMv4 server-side XDR layer from
 hand-written C to xdrgen-generated code, spanning roughly thirty
 patches. XDR functions are generally boilerplate code and are easy
 to get wrong. The goals of this conversion are improved memory
 safety, lower maintenance burden, and groundwork for eventual Rust
 code generation for these functions.
 
 Dai Ngo improved pNFS block/SCSI layout robustness with two related
 changes. SCSI persistent reservation fencing is now tracked per
 client and per device via an xarray, to avoid both redundant preempt
 operations on devices already fenced and a potential NFSD deadlock
 when all nfsd threads are waiting for a layout return.
 
 The remaining patches deliver scalability and infrastructure
 improvements. Sincere thanks to all contributors, reviewers,
 testers, and bug reporters who participated in the v7.1 NFSD
 development cycle.
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Merge tag 'nfsd-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd updates from Chuck Lever:

 - filehandle signing to defend against filehandle-guessing attacks
   (Benjamin Coddington)

   The server now appends a SipHash-2-4 MAC to each filehandle when
   the new "sign_fh" export option is enabled. NFSD then verifies
   filehandles received from clients against the expected MAC;
   mismatches return NFS error STALE

 - convert the entire NLMv4 server-side XDR layer from hand-written C to
   xdrgen-generated code, spanning roughly thirty patches (Chuck Lever)

   XDR functions are generally boilerplate code and are easy to get
   wrong. The goals of this conversion are improved memory safety, lower
   maintenance burden, and groundwork for eventual Rust code generation
   for these functions.

 - improve pNFS block/SCSI layout robustness with two related changes
   (Dai Ngo)

   SCSI persistent reservation fencing is now tracked per client and
   per device via an xarray, to avoid both redundant preempt operations
   on devices already fenced and a potential NFSD deadlock when all nfsd
   threads are waiting for a layout return.

 - scalability and infrastructure improvements

   Sincere thanks to all contributors, reviewers, testers, and bug
   reporters who participated in the v7.1 NFSD development cycle.

* tag 'nfsd-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: (83 commits)
  NFSD: Docs: clean up pnfs server timeout docs
  nfsd: fix comment typo in nfsxdr
  nfsd: fix comment typo in nfs3xdr
  NFSD: convert callback RPC program to per-net namespace
  NFSD: use per-operation statidx for callback procedures
  svcrdma: Use contiguous pages for RDMA Read sink buffers
  SUNRPC: Add svc_rqst_page_release() helper
  SUNRPC: xdr.h: fix all kernel-doc warnings
  svcrdma: Factor out WR chain linking into helper
  svcrdma: Add Write chunk WRs to the RPC's Send WR chain
  svcrdma: Clean up use of rdma->sc_pd->device
  svcrdma: Clean up use of rdma->sc_pd->device in Receive paths
  svcrdma: Add fair queuing for Send Queue access
  SUNRPC: Optimize rq_respages allocation in svc_alloc_arg
  SUNRPC: Track consumed rq_pages entries
  svcrdma: preserve rq_next_page in svc_rdma_save_io_pages
  SUNRPC: Handle NULL entries in svc_rqst_release_pages
  SUNRPC: Allocate a separate Reply page array
  SUNRPC: Tighten bounds checking in svc_rqst_replace_page
  NFSD: Sign filehandles
  ...
 2026-04-20 10:44:02 -07:00
Linus Torvalds
40735a683b mm.git review status for linus..mm-stable 
Everything:
 
 Total patches:       121
 Reviews/patch:       2.11
 Reviewed rate:       90%
 
 Excluding DAMON:
 
 Total patches:       113
 Reviews/patch:       2.25
 Reviewed rate:       96%
 
 - The 33 patch series "Eliminate Dying Memory Cgroup" from Qi Zheng and
   Muchun Song addresses the longstanding "dying memcg problem".  A
   situation wherein a no-longer-used memory control group will hang around
   for an extended period pointlessly consuming memory.  The [0/N]
   changelog has a good overview of this work.
 
 - The 3 patch series "fix unexpected type conversions and potential
   overflows" from Qi Zheng fixes a couple of potential 32-bit/64-bit
   issues which were identified during review of the "Eliminate Dying
   Memory Cgroup" series.
 
 - The 6 patch series "kho: history: track previous kernel version and
   kexec boot count" from Breno Leitao uses Kexec Handover (KHO) to pass
   the previous kernel's version string and the number of kexec reboots
   since the last cold boot to the next kernel, and prints it at boot time.
 
 - The 4 patch series "liveupdate: prevent double preservation" from
   Pasha Tatashin teaches LUO to avoid managing the same file across
   different active sessions.
 
 - The 10 patch series "liveupdate: Fix module unloading and unregister
   API" from Pasha Tatashin addresses an issue with how LUO handles module
   reference counting and unregistration during module unloading.
 
 - The 2 patch series "zswap pool per-CPU acomp_ctx simplifications" from
   Kanchana Sridhar simplifies and cleans up the zswap crypto compression
   handling and improves the lifecycle management of zswap pool's per-CPU
   acomp_ctx resources.
 
 - The 2 patch series "mm/damon/core: fix damon_call()/damos_walk() vs
   kdmond exit race" from SeongJae Park addresses unlikely but possible
   leaks and deadlocks in damon_call() and damon_walk().
 
 - The 2 patch series "mm/damon/core: validate damos_quota_goal->nid"
   from SeongJae Park fixes a couple of root-only wild pointer
   dereferences.
 
 - The 2 patch series "Docs/admin-guide/mm/damon: warn commit_inputs vs
   other params race" from SeongJae Park updates the DAMON documentation to
   warn operators about potential races which can occur if the
   commit_inputs parameter is altered at the wrong time.
 
 - The 3 patch series "Minor hmm_test fixes and cleanups" from Alistair
   Popple implements two bugfixes a cleanup for the HMM kernel selftests.
 
 - The 6 patch series "Modify memfd_luo code" from Chenghao Duan provides
   cleanups, simplifications and speedups in the memfd_lou code.
 
 - The 4 patch series "mm, kvm: allow uffd support in guest_memfd" from
   Mike Rapoport enables support for userfaultfd in guest_memfd.
 
 - The 6 patch series "selftests/mm: skip several tests when thp is not
   available" from Chunyu Hu fixes several issues in the selftests code
   which were causing breakage when the tests were run on CONFIG_THP=n
   kernels.
 
 - The 2 patch series "mm/mprotect: micro-optimization work" from Pedro
   Falcato implements a couple of nice speedups for mprotect().
 
 - The 3 patch series "MAINTAINERS: update KHO and LIVE UPDATE entries"
   from Pratyush Yadav reflects upcoming changes in the maintenance of KHO,
   LUO, memfd_luo, kexec, crash, kdump and probably other kexec-based
   things - they are being moved out of mm.git and into a new git tree.
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Merge tag 'mm-stable-2026-04-18-02-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull more MM updates from Andrew Morton:

 - "Eliminate Dying Memory Cgroup" (Qi Zheng and Muchun Song)

   Address the longstanding "dying memcg problem". A situation wherein a
   no-longer-used memory control group will hang around for an extended
   period pointlessly consuming memory

 - "fix unexpected type conversions and potential overflows" (Qi Zheng)

   Fix a couple of potential 32-bit/64-bit issues which were identified
   during review of the "Eliminate Dying Memory Cgroup" series

 - "kho: history: track previous kernel version and kexec boot count"
   (Breno Leitao)

   Use Kexec Handover (KHO) to pass the previous kernel's version string
   and the number of kexec reboots since the last cold boot to the next
   kernel, and print it at boot time

 - "liveupdate: prevent double preservation" (Pasha Tatashin)

   Teach LUO to avoid managing the same file across different active
   sessions

 - "liveupdate: Fix module unloading and unregister API" (Pasha
   Tatashin)

   Address an issue with how LUO handles module reference counting and
   unregistration during module unloading

 - "zswap pool per-CPU acomp_ctx simplifications" (Kanchana Sridhar)

   Simplify and clean up the zswap crypto compression handling and
   improve the lifecycle management of zswap pool's per-CPU acomp_ctx
   resources

 - "mm/damon/core: fix damon_call()/damos_walk() vs kdmond exit race"
   (SeongJae Park)

   Address unlikely but possible leaks and deadlocks in damon_call() and
   damon_walk()

 - "mm/damon/core: validate damos_quota_goal->nid" (SeongJae Park)

   Fix a couple of root-only wild pointer dereferences

 - "Docs/admin-guide/mm/damon: warn commit_inputs vs other params race"
   (SeongJae Park)

   Update the DAMON documentation to warn operators about potential
   races which can occur if the commit_inputs parameter is altered at
   the wrong time

 - "Minor hmm_test fixes and cleanups" (Alistair Popple)

   Bugfixes and a cleanup for the HMM kernel selftests

 - "Modify memfd_luo code" (Chenghao Duan)

   Cleanups, simplifications and speedups to the memfd_lou code

 - "mm, kvm: allow uffd support in guest_memfd" (Mike Rapoport)

   Support for userfaultfd in guest_memfd

 - "selftests/mm: skip several tests when thp is not available" (Chunyu
   Hu)

   Fix several issues in the selftests code which were causing breakage
   when the tests were run on CONFIG_THP=n kernels

 - "mm/mprotect: micro-optimization work" (Pedro Falcato)

   A couple of nice speedups for mprotect()

 - "MAINTAINERS: update KHO and LIVE UPDATE entries" (Pratyush Yadav)

   Document upcoming changes in the maintenance of KHO, LUO, memfd_luo,
   kexec, crash, kdump and probably other kexec-based things - they are
   being moved out of mm.git and into a new git tree

* tag 'mm-stable-2026-04-18-02-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (121 commits)
  MAINTAINERS: add page cache reviewer
  mm/vmscan: avoid false-positive -Wuninitialized warning
  MAINTAINERS: update Dave's kdump reviewer email address
  MAINTAINERS: drop include/linux/liveupdate from LIVE UPDATE
  MAINTAINERS: drop include/linux/kho/abi/ from KHO
  MAINTAINERS: update KHO and LIVE UPDATE maintainers
  MAINTAINERS: update kexec/kdump maintainers entries
  mm/migrate_device: remove dead migration entry check in migrate_vma_collect_huge_pmd()
  selftests: mm: skip charge_reserved_hugetlb without killall
  userfaultfd: allow registration of ranges below mmap_min_addr
  mm/vmstat: fix vmstat_shepherd double-scheduling vmstat_update
  mm/hugetlb: fix early boot crash on parameters without '=' separator
  zram: reject unrecognized type= values in recompress_store()
  docs: proc: document ProtectionKey in smaps
  mm/mprotect: special-case small folios when applying permissions
  mm/mprotect: move softleaf code out of the main function
  mm: remove '!root_reclaim' checking in should_abort_scan()
  mm/sparse: fix comment for section map alignment
  mm/page_io: use sio->len for PSWPIN accounting in sio_read_complete()
  selftests/mm: transhuge_stress: skip the test when thp not available
  ...
 2026-04-19 08:01:17 -07:00
SeongJae Park
0c13ed77dd Docs/admin-guide/mm/damon/lru_sort: warn commit_inputs vs param updates race 
DAMON_LRU_SORT handles commit_inputs request inside kdamond thread,
reading the module parameters.  If the user updates the module
parameters while the kdamond thread is reading those, races can happen.
To avoid this, the commit_inputs parameter shows whether it is still in
the progress, assuming users wouldn't update parameters in the middle of
the work.  Some users might ignore that.  Add a warning about the
behavior.

The issue was discovered in [1] by sashiko.

Link: https://lore.kernel.org/20260329153052.46657-3-sj@kernel.org
Link: https://lore.kernel.org/20260319161620.189392-2-objecting@objecting.org [1]
Fixes: 6acfcd0d75 ("Docs/admin-guide/damon: add a document for DAMON_LRU_SORT")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: <stable@vger.kernel.org> # 6.0.x
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-04-18 00:10:51 -07:00
SeongJae Park
0beba407d4 Docs/admin-guide/mm/damon/reclaim: warn commit_inputs vs param updates race 
Patch series "Docs/admin-guide/mm/damon: warn commit_inputs vs other
params race".

Writing 'Y' to the commit_inputs parameter of DAMON_RECLAIM and
DAMON_LRU_SORT, and writing other parameters before the commit_inputs
request is completely processed can cause race conditions.  While the
consequence can be bad, the documentation is not clearly describing that. 
Add clear warnings.

The issue was discovered [1,2] by sashiko.


This patch (of 2):

DAMON_RECLAIM handles commit_inputs request inside kdamond thread,
reading the module parameters.  If the user updates the module
parameters while the kdamond thread is reading those, races can happen.
To avoid this, the commit_inputs parameter shows whether it is still in
the progress, assuming users wouldn't update parameters in the middle of
the work.  Some users might ignore that.  Add a warning about the
behavior.

The issue was discovered in [1] by sashiko.

Link: https://lore.kernel.org/20260329153052.46657-2-sj@kernel.org
Link: https://lore.kernel.org/20260319161620.189392-3-objecting@objecting.org [1]
Link: https://lore.kernel.org/20260319161620.189392-2-objecting@objecting.org [3]
Fixes: 81a84182c3 ("Docs/admin-guide/mm/damon/reclaim: document 'commit_inputs' parameter")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: <stable@vger.kernel.org> # 5.19.x
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-04-18 00:10:51 -07:00
Breno Leitao
e524feaad5 kho: document kexec-metadata tracking feature 
Add documentation for the kexec-metadata feature that tracks the previous
kernel version and kexec boot count across kexec reboots.  This helps
diagnose bugs that only reproduce when kexecing from specific kernel
versions.

Link: https://lore.kernel.org/20260316-kho-v9-6-ed6dcd951988@debian.org
Signed-off-by: Breno Leitao <leitao@debian.org>
Suggested-by: Mike Rapoport <rppt@kernel.org>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Pratyush Yadav <pratyush@kernel.org>
Cc: Alexander Graf <graf@amazon.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: SeongJae Park <sj@kernel.org>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-04-18 00:10:49 -07:00
Breno Leitao
4916ae3867 kho: rename fdt parameter to blob in kho_add/remove_subtree() 
Since kho_add_subtree() now accepts arbitrary data blobs (not just FDTs),
rename the parameter from 'fdt' to 'blob' to better reflect its purpose. 
Apply the same rename to kho_remove_subtree() for consistency.

Also rename kho_debugfs_fdt_add() and kho_debugfs_fdt_remove() to
kho_debugfs_blob_add() and kho_debugfs_blob_remove() respectively, with
the same parameter rename from 'fdt' to 'blob'.

Link: https://lore.kernel.org/20260316-kho-v9-2-ed6dcd951988@debian.org
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Pratyush Yadav <pratyush@kernel.org>
Cc: Alexander Graf <graf@amazon.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: SeongJae Park <sj@kernel.org>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-04-18 00:10:48 -07:00
Linus Torvalds
9cdca33667 integrity-v7.1 
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Merge tag 'integrity-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity

Pull integrity updates from Mimi Zohar:
 "There are two main changes, one feature removal, some code cleanup,
  and a number of bug fixes.

  Main changes:
   - Detecting secure boot mode was limited to IMA. Make detecting
     secure boot mode accessible to EVM and other LSMs
   - IMA sigv3 support was limited to fsverity. Add IMA sigv3 support
     for IMA regular file hashes and EVM portable signatures

  Remove:
   - Remove IMA support for asychronous hash calculation originally
     added for hardware acceleration

  Cleanup:
   - Remove unnecessary Kconfig CONFIG_MODULE_SIG and CONFIG_KEXEC_SIG
     tests
   - Add descriptions of the IMA atomic flags

  Bug fixes:
   - Like IMA, properly limit EVM "fix" mode
   - Define and call evm_fix_hmac() to update security.evm
   - Fallback to using i_version to detect file change for filesystems
     that do not support STATX_CHANGE_COOKIE
   - Address missing kernel support for configured (new) TPM hash
     algorithms
   - Add missing crypto_shash_final() return value"

* tag 'integrity-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity:
  evm: Enforce signatures version 3 with new EVM policy 'bit 3'
  integrity: Allow sigv3 verification on EVM_XATTR_PORTABLE_DIGSIG
  ima: add support to require IMA sigv3 signatures
  ima: add regular file data hash signature version 3 support
  ima: Define asymmetric_verify_v3() to verify IMA sigv3 signatures
  ima: remove buggy support for asynchronous hashes
  integrity: Eliminate weak definition of arch_get_secureboot()
  ima: Add code comments to explain IMA iint cache atomic_flags
  ima_fs: Correctly create securityfs files for unsupported hash algos
  ima: check return value of crypto_shash_final() in boot aggregate
  ima: Define and use a digest_size field in the ima_algo_desc structure
  powerpc/ima: Drop unnecessary check for CONFIG_MODULE_SIG
  ima: efi: Drop unnecessary check for CONFIG_MODULE_SIG/CONFIG_KEXEC_SIG
  ima: fallback to using i_version to detect file change
  evm: fix security.evm for a file with IMA signature
  s390: Drop unnecessary CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT
  evm: Don't enable fix mode when secure boot is enabled
  integrity: Make arch_ima_get_secureboot integrity-wide
 2026-04-17 15:42:01 -07:00
Linus Torvalds
01f492e181 Arm: 
- Add support for tracing in the standalone EL2 hypervisor code, which
   should help both debugging and performance analysis.  This uses the
   new infrastructure for 'remote' trace buffers that can be exposed
   by non-kernel entities such as firmware, and which came through the
   tracing tree.
 
 - Add support for GICv5 Per Processor Interrupts (PPIs), as the starting
   point for supporting the new GIC architecture in KVM.
 
 - Finally add support for pKVM protected guests, where pages are unmapped
   from the host as they are faulted into the guest and can be shared back
   from the guest using pKVM hypercalls.  Protected guests are created
   using a new machine type identifier.  As the elusive guestmem has not
   yet delivered on its promises, anonymous memory is also supported.
 
   This is only a first step towards full isolation from the host; for
   example, the CPU register state and DMA accesses are not yet isolated.
   Because this does not really yet bring fully what it promises, it is
   hidden behind CONFIG_ARM_PKVM_GUEST + 'kvm-arm.mode=protected', and
   also triggers TAINT_USER when a VM is created.  Caveat emptor.
 
 - Rework the dreaded user_mem_abort() function to make it more
   maintainable, reducing the amount of state being exposed to the
   various helpers and rendering a substantial amount of state immutable.
 
 - Expand the Stage-2 page table dumper to support NV shadow page tables
   on a per-VM basis.
 
 - Tidy up the pKVM PSCI proxy code to be slightly less hard to follow.
 
 - Fix both SPE and TRBE in non-VHE configurations so that they do not
   generate spurious, out of context table walks that ultimately lead
   to very bad HW lockups.
 
 - A small set of patches fixing the Stage-2 MMU freeing in error cases.
 
 - Tighten-up accepted SMC immediate value to be only #0 for host
   SMCCC calls.
 
 - The usual cleanups and other selftest churn.
 
 LoongArch:
 
 - Use CSR_CRMD_PLV for kvm_arch_vcpu_in_kernel().
 
 - Add DMSINTC irqchip in kernel support.
 
 RISC-V:
 
 - Fix steal time shared memory alignment checks
 
 - Fix vector context allocation leak
 
 - Fix array out-of-bounds in pmu_ctr_read() and pmu_fw_ctr_read_hi()
 
 - Fix double-free of sdata in kvm_pmu_clear_snapshot_area()
 
 - Fix integer overflow in kvm_pmu_validate_counter_mask()
 
 - Fix shift-out-of-bounds in make_xfence_request()
 
 - Fix lost write protection on huge pages during dirty logging
 
 - Split huge pages during fault handling for dirty logging
 
 - Skip CSR restore if VCPU is reloaded on the same core
 
 - Implement kvm_arch_has_default_irqchip() for KVM selftests
 
 - Factored-out ISA checks into separate sources
 
 - Added hideleg to struct kvm_vcpu_config
 
 - Factored-out VCPU config into separate sources
 
 - Support configuration of per-VM HGATP mode from KVM user space
 
 s390:
 
 - Support for ESA (31-bit) guests inside nested hypervisors.
 
 - Remove restriction on memslot alignment, which is not needed anymore with
   the new gmap code.
 
 - Fix LPSW/E to update the bear (which of course is the breaking event
   address register).
 
 x86:
 
 - Shut up various UBSAN warnings on reading module parameter before they
   were initialized.
 
 - Don't zero-allocate page tables that are used for splitting hugepages in
   the TDP MMU, as KVM is guaranteed to set all SPTEs in the page table and
   thus write all bytes.
 
 - As an optimization, bail early when trying to unsync 4KiB mappings if the
   target gfn can just be mapped with a 2MiB hugepage.
 
 x86 generic:
 
 - Copy single-chunk MMIO write values into struct kvm_vcpu (more precisely
   struct kvm_mmio_fragment) to fix use-after-free stack bugs where KVM
   would dereference stack pointer after an exit to userspace.
 
 - Clean up and comment the emulated MMIO code to try to make it easier to
   maintain (not necessarily "easy", but "easier").
 
 - Move VMXON+VMXOFF and EFER.SVME toggling out of KVM (not *all* of VMX
   and SVM enabling) as it is needed for trusted I/O.
 
 - Advertise support for AVX512 Bit Matrix Multiply (BMM) instructions
 
 - Immediately fail the build if a required #define is missing in one of
   KVM's headers that is included multiple times.
 
 - Reject SET_GUEST_DEBUG with -EBUSY if there's an already injected
   exception, mostly to prevent syzkaller from abusing the uAPI to
   trigger WARNs, but also because it can help prevent userspace from
   unintentionally crashing the VM.
 
 - Exempt SMM from CPUID faulting on Intel, as per the spec.
 
 - Misc hardening and cleanup changes.
 
 x86 (AMD):
 
 - Fix and optimize IRQ window inhibit handling for AVIC; make it per-vCPU
   so that KVM doesn't prematurely re-enable AVIC if multiple
   vCPUs have to-be-injected IRQs.
 
 - Clean up and optimize the OSVW handling, avoiding a bug in which KVM would
   overwrite state when enabling virtualization on multiple CPUs in parallel.
   This should not be a problem because OSVW should usually be the same for
   all CPUs.
 
 - Drop a WARN in KVM_MEMORY_ENCRYPT_REG_REGION where KVM complains about a
   "too large" size based purely on user input.
 
 - Clean up and harden the pinning code for KVM_MEMORY_ENCRYPT_REG_REGION.
 
 - Disallow synchronizing a VMSA of an already-launched/encrypted vCPU, as
   doing so for an SNP guest will crash the host due to an RMP violation
   page fault.
 
 - Overhaul KVM's APIs for detecting SEV+ guests so that VM-scoped queries
   are required to hold kvm->lock, and enforce it by lockdep.  Fix various
   bugs where sev_guest() was not ensured to be stable for the whole
   duration of a function or ioctl.
 
 - Convert a pile of kvm->lock SEV code to guard().
 
 - Play nicer with userspace that does not enable KVM_CAP_EXCEPTION_PAYLOAD,
   for which KVM needs to set CR2 and DR6 as a response to ioctls such as
   KVM_GET_VCPU_EVENTS (even if the payload would end up in EXITINFO2
   rather than CR2, for example).  Only set CR2 and DR6 when consumption of
   the payload is imminent, but on the other hand force delivery of the
   payload in all paths where userspace retrieves CR2 or DR6.
 
 - Use vcpu->arch.cr2 when updating vmcb12's CR2 on nested #VMEXIT instead
   of vmcb02->save.cr2.  The value is out of sync after a save/restore
   or after a #PF is injected into L2.
 
 - Fix a class of nSVM bugs where some fields written by the CPU are not
   synchronized from vmcb02 to cached vmcb12 after VMRUN, and so are not
   up-to-date when saved by KVM_GET_NESTED_STATE.
 
 - Fix a class of bugs where the ordering between KVM_SET_NESTED_STATE and
   KVM_SET_{S}REGS could cause vmcb02 to be incorrectly initialized after
   save+restore.
 
 - Add a variety of missing nSVM consistency checks.
 
 - Fix several bugs where KVM failed to correctly update VMCB fields on
   nested #VMEXIT.
 
 - Fix several bugs where KVM failed to correctly synthesize #UD or #GP for
   SVM-related instructions.
 
 - Add support for save+restore of virtualized LBRs (on SVM).
 
 - Refactor various helpers and macros to improve clarity and (hopefully)
   make the code easier to maintain.
 
 - Aggressively sanitize fields when copying from vmcb12, to guard against
   unintentionally allowing L1 to utilize yet-to-be-defined features.
 
 - Fix several bugs where KVM botched rAX legality checks when emulating SVM
   instructions.  There are remaining issues in that KVM doesn't handle size
   prefix overrides for 64-bit guests.
 
 - Fail emulation of VMRUN/VMLOAD/VMSAVE if mapping vmcb12 fails instead of
   somewhat arbitrarily synthesizing #GP (i.e. don't double down on AMD's
   architectural but sketchy behavior of generating #GP for "unsupported"
   addresses).
 
 - Cache all used vmcb12 fields to further harden against TOCTOU bugs.
 
 x86 (Intel):
 
 - Drop obsolete branch hint prefixes from the VMX instruction macros.
 
 - Use ASM_INPUT_RM() in __vmcs_writel() to coerce clang into using a
   register input when appropriate.
 
 - Code cleanups.
 
 guest_memfd:
 
 - Don't mark guest_memfd folios as accessed, as guest_memfd doesn't support
   reclaim, the memory is unevictable, and there is no storage to write
   back to.
 
 LoongArch selftests:
 
 - Add KVM PMU test cases
 
 s390 selftests:
 
 - Enable more memory selftests.
 
 x86 selftests:
 
 - Add support for Hygon CPUs in KVM selftests.
 
 - Fix a bug in the MSR test where it would get false failures on AMD/Hygon
   CPUs with exactly one of RDPID or RDTSCP.
 
 - Add an MADV_COLLAPSE testcase for guest_memfd as a regression test for a
   bug where the kernel would attempt to collapse guest_memfd folios against
   KVM's will.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm updates from Paolo Bonzini:
 "Arm:

   - Add support for tracing in the standalone EL2 hypervisor code,
     which should help both debugging and performance analysis. This
     uses the new infrastructure for 'remote' trace buffers that can be
     exposed by non-kernel entities such as firmware, and which came
     through the tracing tree

   - Add support for GICv5 Per Processor Interrupts (PPIs), as the
     starting point for supporting the new GIC architecture in KVM

   - Finally add support for pKVM protected guests, where pages are
     unmapped from the host as they are faulted into the guest and can
     be shared back from the guest using pKVM hypercalls. Protected
     guests are created using a new machine type identifier. As the
     elusive guestmem has not yet delivered on its promises, anonymous
     memory is also supported

     This is only a first step towards full isolation from the host; for
     example, the CPU register state and DMA accesses are not yet
     isolated. Because this does not really yet bring fully what it
     promises, it is hidden behind CONFIG_ARM_PKVM_GUEST +
     'kvm-arm.mode=protected', and also triggers TAINT_USER when a VM is
     created. Caveat emptor

   - Rework the dreaded user_mem_abort() function to make it more
     maintainable, reducing the amount of state being exposed to the
     various helpers and rendering a substantial amount of state
     immutable

   - Expand the Stage-2 page table dumper to support NV shadow page
     tables on a per-VM basis

   - Tidy up the pKVM PSCI proxy code to be slightly less hard to
     follow

   - Fix both SPE and TRBE in non-VHE configurations so that they do not
     generate spurious, out of context table walks that ultimately lead
     to very bad HW lockups

   - A small set of patches fixing the Stage-2 MMU freeing in error
     cases

   - Tighten-up accepted SMC immediate value to be only #0 for host
     SMCCC calls

   - The usual cleanups and other selftest churn

  LoongArch:

   - Use CSR_CRMD_PLV for kvm_arch_vcpu_in_kernel()

   - Add DMSINTC irqchip in kernel support

  RISC-V:

   - Fix steal time shared memory alignment checks

   - Fix vector context allocation leak

   - Fix array out-of-bounds in pmu_ctr_read() and pmu_fw_ctr_read_hi()

   - Fix double-free of sdata in kvm_pmu_clear_snapshot_area()

   - Fix integer overflow in kvm_pmu_validate_counter_mask()

   - Fix shift-out-of-bounds in make_xfence_request()

   - Fix lost write protection on huge pages during dirty logging

   - Split huge pages during fault handling for dirty logging

   - Skip CSR restore if VCPU is reloaded on the same core

   - Implement kvm_arch_has_default_irqchip() for KVM selftests

   - Factored-out ISA checks into separate sources

   - Added hideleg to struct kvm_vcpu_config

   - Factored-out VCPU config into separate sources

   - Support configuration of per-VM HGATP mode from KVM user space

  s390:

   - Support for ESA (31-bit) guests inside nested hypervisors

   - Remove restriction on memslot alignment, which is not needed
     anymore with the new gmap code

   - Fix LPSW/E to update the bear (which of course is the breaking
     event address register)

  x86:

   - Shut up various UBSAN warnings on reading module parameter before
     they were initialized

   - Don't zero-allocate page tables that are used for splitting
     hugepages in the TDP MMU, as KVM is guaranteed to set all SPTEs in
     the page table and thus write all bytes

   - As an optimization, bail early when trying to unsync 4KiB mappings
     if the target gfn can just be mapped with a 2MiB hugepage

  x86 generic:

   - Copy single-chunk MMIO write values into struct kvm_vcpu (more
     precisely struct kvm_mmio_fragment) to fix use-after-free stack
     bugs where KVM would dereference stack pointer after an exit to
     userspace

   - Clean up and comment the emulated MMIO code to try to make it
     easier to maintain (not necessarily "easy", but "easier")

   - Move VMXON+VMXOFF and EFER.SVME toggling out of KVM (not *all* of
     VMX and SVM enabling) as it is needed for trusted I/O

   - Advertise support for AVX512 Bit Matrix Multiply (BMM) instructions

   - Immediately fail the build if a required #define is missing in one
     of KVM's headers that is included multiple times

   - Reject SET_GUEST_DEBUG with -EBUSY if there's an already injected
     exception, mostly to prevent syzkaller from abusing the uAPI to
     trigger WARNs, but also because it can help prevent userspace from
     unintentionally crashing the VM

   - Exempt SMM from CPUID faulting on Intel, as per the spec

   - Misc hardening and cleanup changes

  x86 (AMD):

   - Fix and optimize IRQ window inhibit handling for AVIC; make it
     per-vCPU so that KVM doesn't prematurely re-enable AVIC if multiple
     vCPUs have to-be-injected IRQs

   - Clean up and optimize the OSVW handling, avoiding a bug in which
     KVM would overwrite state when enabling virtualization on multiple
     CPUs in parallel. This should not be a problem because OSVW should
     usually be the same for all CPUs

   - Drop a WARN in KVM_MEMORY_ENCRYPT_REG_REGION where KVM complains
     about a "too large" size based purely on user input

   - Clean up and harden the pinning code for KVM_MEMORY_ENCRYPT_REG_REGION

   - Disallow synchronizing a VMSA of an already-launched/encrypted
     vCPU, as doing so for an SNP guest will crash the host due to an
     RMP violation page fault

   - Overhaul KVM's APIs for detecting SEV+ guests so that VM-scoped
     queries are required to hold kvm->lock, and enforce it by lockdep.
     Fix various bugs where sev_guest() was not ensured to be stable for
     the whole duration of a function or ioctl

   - Convert a pile of kvm->lock SEV code to guard()

   - Play nicer with userspace that does not enable
     KVM_CAP_EXCEPTION_PAYLOAD, for which KVM needs to set CR2 and DR6
     as a response to ioctls such as KVM_GET_VCPU_EVENTS (even if the
     payload would end up in EXITINFO2 rather than CR2, for example).
     Only set CR2 and DR6 when consumption of the payload is imminent,
     but on the other hand force delivery of the payload in all paths
     where userspace retrieves CR2 or DR6

   - Use vcpu->arch.cr2 when updating vmcb12's CR2 on nested #VMEXIT
     instead of vmcb02->save.cr2. The value is out of sync after a
     save/restore or after a #PF is injected into L2

   - Fix a class of nSVM bugs where some fields written by the CPU are
     not synchronized from vmcb02 to cached vmcb12 after VMRUN, and so
     are not up-to-date when saved by KVM_GET_NESTED_STATE

   - Fix a class of bugs where the ordering between KVM_SET_NESTED_STATE
     and KVM_SET_{S}REGS could cause vmcb02 to be incorrectly
     initialized after save+restore

   - Add a variety of missing nSVM consistency checks

   - Fix several bugs where KVM failed to correctly update VMCB fields
     on nested #VMEXIT

   - Fix several bugs where KVM failed to correctly synthesize #UD or
     #GP for SVM-related instructions

   - Add support for save+restore of virtualized LBRs (on SVM)

   - Refactor various helpers and macros to improve clarity and
     (hopefully) make the code easier to maintain

   - Aggressively sanitize fields when copying from vmcb12, to guard
     against unintentionally allowing L1 to utilize yet-to-be-defined
     features

   - Fix several bugs where KVM botched rAX legality checks when
     emulating SVM instructions. There are remaining issues in that KVM
     doesn't handle size prefix overrides for 64-bit guests

   - Fail emulation of VMRUN/VMLOAD/VMSAVE if mapping vmcb12 fails
     instead of somewhat arbitrarily synthesizing #GP (i.e. don't double
     down on AMD's architectural but sketchy behavior of generating #GP
     for "unsupported" addresses)

   - Cache all used vmcb12 fields to further harden against TOCTOU bugs

  x86 (Intel):

   - Drop obsolete branch hint prefixes from the VMX instruction macros

   - Use ASM_INPUT_RM() in __vmcs_writel() to coerce clang into using a
     register input when appropriate

   - Code cleanups

  guest_memfd:

   - Don't mark guest_memfd folios as accessed, as guest_memfd doesn't
     support reclaim, the memory is unevictable, and there is no storage
     to write back to

  LoongArch selftests:

   - Add KVM PMU test cases

  s390 selftests:

   - Enable more memory selftests

  x86 selftests:

   - Add support for Hygon CPUs in KVM selftests

   - Fix a bug in the MSR test where it would get false failures on
     AMD/Hygon CPUs with exactly one of RDPID or RDTSCP

   - Add an MADV_COLLAPSE testcase for guest_memfd as a regression test
     for a bug where the kernel would attempt to collapse guest_memfd
     folios against KVM's will"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (373 commits)
  KVM: x86: use inlines instead of macros for is_sev_*guest
  x86/virt: Treat SVM as unsupported when running as an SEV+ guest
  KVM: SEV: Goto an existing error label if charging misc_cg for an ASID fails
  KVM: SVM: Move lock-protected allocation of SEV ASID into a separate helper
  KVM: SEV: use mutex guard in snp_handle_guest_req()
  KVM: SEV: use mutex guard in sev_mem_enc_unregister_region()
  KVM: SEV: use mutex guard in sev_mem_enc_ioctl()
  KVM: SEV: use mutex guard in snp_launch_update()
  KVM: SEV: Assert that kvm->lock is held when querying SEV+ support
  KVM: SEV: Document that checking for SEV+ guests when reclaiming memory is "safe"
  KVM: SEV: Hide "struct kvm_sev_info" behind CONFIG_KVM_AMD_SEV=y
  KVM: SEV: WARN on unhandled VM type when initializing VM
  KVM: LoongArch: selftests: Add PMU overflow interrupt test
  KVM: LoongArch: selftests: Add basic PMU event counting test
  KVM: LoongArch: selftests: Add cpucfg read/write helpers
  LoongArch: KVM: Add DMSINTC inject msi to vCPU
  LoongArch: KVM: Add DMSINTC device support
  LoongArch: KVM: Make vcpu_is_preempted() as a macro rather than function
  LoongArch: KVM: Move host CSR_GSTAT save and restore in context switch
  LoongArch: KVM: Move host CSR_EENTRY save and restore in context switch
  ...
 2026-04-17 07:18:03 -07:00
Linus Torvalds
440d6635b2 mm.git review status for linus..mm-nonmm-stable 
Total patches:       126
 Reviews/patch:       0.92
 Reviewed rate:       76%
 
 - The 2 patch series "pid: make sub-init creation retryable" from Oleg
   Nesterov increases the robustness of our creation of init in a new
   namespace.  By clearing away some historical cruft which is no longer
   needed.  Also some documentation fixups are provided.
 
 - The 2 patch series "selftests/fchmodat2: Error handling and general"
   from Mark Brown has a fixup and a cleanup for the fchmodat2() syscall
   selftest.
 
 - The 3 patch series "lib: polynomial: Move to math/ and clean up" from
   Andy Shevchenko does as advertised.
 
 - The 3 patch series "hung_task: Provide runtime reset interface for
   hung task detector" from Aaron Tomlin gives administrators the ability
   to zero out /proc/sys/kernel/hung_task_detect_count.
 
 - The 2 patch series "tools/getdelays: use the static UAPI headers from
   tools/include/uapi" from Thomas Weißschuh teaches getdelays to use the
   in-kernel UAPI headers rather than the system-provided ones.
 
 - The 5 patch series "watchdog/hardlockup: Improvements to hardlockup"
   from Mayank Rungta provides several cleanups and fixups to the
   hardlockup detector code and its documentation.
 
 - The 2 patch series "lib/bch: fix undefined behavior from signed
   left-shifts" from Josh Law provides a couple of small/theoretical fixes
   in the bch code.
 
 - The 2 patch series "ocfs2/dlm: fix two bugs in dlm_match_regions()"
   from Junrui Luo does what is claims.
 
 - The 27 patch series "cleanup the RAID5 XOR library" from Christoph
   Hellwig is a quite far-reaching cleanup to this code.  I can't do better
   than to quote Christoph:
 
     The XOR library used for the RAID5 parity is a bit of a mess right
     now.  The main file sits in crypto/ despite not being cryptography and
     not using the crypto API, with the generic implementations sitting in
     include/asm-generic and the arch implementations sitting in an asm/
     header in theory.  The latter doesn't work for many cases, so
     architectures often build the code directly into the core kernel, or
     create another module for the architecture code.
 
     Change this to a single module in lib/ that also contains the
     architecture optimizations, similar to the library work Eric Biggers
     has done for the CRC and crypto libraries later.  After that it
     changes to better calling conventions that allow for smarter
     architecture implementations (although none is contained here yet),
     and uses static_call to avoid indirection function call overhead.
 
 - The 2 patch series "lib/list_sort: Clean up list_sort() scheduling
   workarounds" from Kuan-Wei Chiu cleans up this library code by removing
   a hacky thing which was added for UBIFS, which UBIFS doesn't actually
   need.
 
 - The 5 patch series "Fix bugs in extract_iter_to_sg()" from Christian
   Ehrhardt fixes a few bugs in the scatterlist code, adds in-kernel tests
   for the now-fixed bugs and fixes a leak in the test itself.
 
 - The 3 patch series "kdump: Enable LUKS-encrypted dump target support
   in ARM64 and PowerPC" from Coiby Xu eenables support of the
   LUKS-encrypted device dump target on arm64 and powerpc.
 
 - The 4 patch series "ocfs2: consolidate extent list validation into
   block read callbacks" from Joseph Qi addresses ocfs2's validation of
   extent list fields - cleanup, simplification, robustness.  (Kernel test
   robot loves mounting corrupted fs images!)
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Merge tag 'mm-nonmm-stable-2026-04-15-04-20' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:

 - "pid: make sub-init creation retryable" (Oleg Nesterov)

   Make creation of init in a new namespace more robust by clearing away
   some historical cruft which is no longer needed. Also some
   documentation fixups

 - "selftests/fchmodat2: Error handling and general" (Mark Brown)

   Fix and a cleanup for the fchmodat2() syscall selftest

 - "lib: polynomial: Move to math/ and clean up" (Andy Shevchenko)

 - "hung_task: Provide runtime reset interface for hung task detector"
   (Aaron Tomlin)

   Give administrators the ability to zero out
   /proc/sys/kernel/hung_task_detect_count

 - "tools/getdelays: use the static UAPI headers from
   tools/include/uapi" (Thomas Weißschuh)

   Teach getdelays to use the in-kernel UAPI headers rather than the
   system-provided ones

 - "watchdog/hardlockup: Improvements to hardlockup" (Mayank Rungta)

   Several cleanups and fixups to the hardlockup detector code and its
   documentation

 - "lib/bch: fix undefined behavior from signed left-shifts" (Josh Law)

   A couple of small/theoretical fixes in the bch code

 - "ocfs2/dlm: fix two bugs in dlm_match_regions()" (Junrui Luo)

 - "cleanup the RAID5 XOR library" (Christoph Hellwig)

   A quite far-reaching cleanup to this code. I can't do better than to
   quote Christoph:

     "The XOR library used for the RAID5 parity is a bit of a mess right
      now. The main file sits in crypto/ despite not being cryptography
      and not using the crypto API, with the generic implementations
      sitting in include/asm-generic and the arch implementations
      sitting in an asm/ header in theory. The latter doesn't work for
      many cases, so architectures often build the code directly into
      the core kernel, or create another module for the architecture
      code.

      Change this to a single module in lib/ that also contains the
      architecture optimizations, similar to the library work Eric
      Biggers has done for the CRC and crypto libraries later. After
      that it changes to better calling conventions that allow for
      smarter architecture implementations (although none is contained
      here yet), and uses static_call to avoid indirection function call
      overhead"

 - "lib/list_sort: Clean up list_sort() scheduling workarounds"
   (Kuan-Wei Chiu)

   Clean up this library code by removing a hacky thing which was added
   for UBIFS, which UBIFS doesn't actually need

 - "Fix bugs in extract_iter_to_sg()" (Christian Ehrhardt)

   Fix a few bugs in the scatterlist code, add in-kernel tests for the
   now-fixed bugs and fix a leak in the test itself

 - "kdump: Enable LUKS-encrypted dump target support in ARM64 and
   PowerPC" (Coiby Xu)

   Enable support of the LUKS-encrypted device dump target on arm64 and
   powerpc

 - "ocfs2: consolidate extent list validation into block read callbacks"
   (Joseph Qi)

   Cleanup, simplify, and make more robust ocfs2's validation of extent
   list fields (Kernel test robot loves mounting corrupted fs images!)

* tag 'mm-nonmm-stable-2026-04-15-04-20' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (127 commits)
  ocfs2: validate group add input before caching
  ocfs2: validate bg_bits during freefrag scan
  ocfs2: fix listxattr handling when the buffer is full
  doc: watchdog: fix typos etc
  update Sean's email address
  ocfs2: use get_random_u32() where appropriate
  ocfs2: split transactions in dio completion to avoid credit exhaustion
  ocfs2: remove redundant l_next_free_rec check in __ocfs2_find_path()
  ocfs2: validate extent block list fields during block read
  ocfs2: remove empty extent list check in ocfs2_dx_dir_lookup_rec()
  ocfs2: validate dx_root extent list fields during block read
  ocfs2: fix use-after-free in ocfs2_fault() when VM_FAULT_RETRY
  ocfs2: handle invalid dinode in ocfs2_group_extend
  .get_maintainer.ignore: add Askar
  ocfs2: validate bg_list extent bounds in discontig groups
  checkpatch: exclude forward declarations of const structs
  tools/accounting: handle truncated taskstats netlink messages
  taskstats: set version in TGID exit notifications
  ocfs2/heartbeat: fix slot mapping rollback leaks on error paths
  arm64,ppc64le/kdump: pass dm-crypt keys to kdump kernel
  ...
 2026-04-16 20:11:56 -07:00
Linus Torvalds
a5f998094f Device Mapper patches for 7.1 
dm-vdo:
 - Make dm-vdo able to format the device itself, like other dm targets,
   instead of needing a userspace formating program.
 - Add some sanity checks and code cleanup.
 
 dm-cache:
 - Fix crashes and hangs when operating in passthrough mode (which have
   been around, unnoticed, since 4.12), as well as a late arriving fix for
   an error path bug in the passthrough fix.
 - Fix a corner case memory leak.
 
 dm-verity:
 - Another set of minor bugfixes and code cleanups to the forward error
   correction code.
 
 dm-mirror
 - Fix minor initialization bug
 - Fix overflow crash on a large devices with small region sizes
 
 dm-crypt
 - Reimplement elephant diffuser using AES library and minor cleanups
 
 dm-core:
 - Claude found a buffer overflow in /dev/mapper/contrl ioctl handling
 - make dm_mod.wait_for correctly wait for partitions
 - minor code fixes and cleanups
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Merge tag 'for-7.1/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device mapper updates from Benjamin Marzinski:
 "There are fixes for some corner case crashes in dm-cache and
  dm-mirror, new setup functionality for dm-vdo, and miscellaneous minor
  fixes and cleanups, especially to dm-verity.

  dm-vdo:
   - Make dm-vdo able to format the device itself, like other dm
     targets, instead of needing a userspace formating program
   - Add some sanity checks and code cleanup

  dm-cache:
   - Fix crashes and hangs when operating in passthrough mode (which
     have been around, unnoticed, since 4.12), as well as a late
     arriving fix for an error path bug in the passthrough fix
   - Fix a corner case memory leak

  dm-verity:
   - Another set of minor bugfixes and code cleanups to the forward
     error correction code

  dm-mirror
   - Fix minor initialization bug
   - Fix overflow crash on a large devices with small region sizes

  dm-crypt
   - Reimplement elephant diffuser using AES library and minor cleanups

  dm-core:
   - Claude found a buffer overflow in /dev/mapper/contrl ioctl handling
   - make dm_mod.wait_for correctly wait for partitions
   - minor code fixes and cleanups"

* tag 'for-7.1/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (62 commits)
  dm cache: fix missing return in invalidate_committed's error path
  dm: fix a buffer overflow in ioctl processing
  dm-crypt: Make crypt_iv_operations::post return void
  dm vdo: Fix spelling mistake "postive" -> "positive"
  dm: provide helper to set stacked limits
  dm-integrity: always set the io hints
  dm-integrity: fix mismatched queue limits
  dm-bufio: use kzalloc_flex
  dm vdo: save the formatted metadata to disk
  dm vdo: add formatting logic and initialization
  dm vdo: add synchronous metadata I/O submission helper
  dm vdo: add geometry block structure
  dm vdo: add geometry block encoding
  dm vdo: add upfront validation for logical size
  dm vdo: add formatting parameters to table line
  dm vdo: add super block initialization to encodings.c
  dm vdo: add geometry block initialization to encodings.c
  dm-crypt: Make crypt_iv_operations::wipe return void
  dm-crypt: Reimplement elephant diffuser using AES library
  dm-verity-fec: warn even when there were no errors
  ...
 2026-04-15 15:11:05 -07:00
Linus Torvalds
334fbe734e mm.git review status for linus..mm-stable 
Everything:
 
 Total patches:       368
 Reviews/patch:       1.56
 Reviewed rate:       74%
 
 Excluding DAMON:
 
 Total patches:       316
 Reviews/patch:       1.77
 Reviewed rate:       81%
 
 Excluding DAMON and zram:
 
 Total patches:       306
 Reviews/patch:       1.81
 Reviewed rate:       82%
 
 Excluding DAMON, zram and maple_tree:
 
 Total patches:       276
 Reviews/patch:       2.01
 Reviewed rate:       91%
 
 Significant patch series in this merge:
 
 - The 30 patch series "maple_tree: Replace big node with maple copy"
   from Liam Howlett is mainly prepararatory work for ongoing development
   but it does reduce stack usage and is an improvement.
 
 - The 12 patch series "mm, swap: swap table phase III: remove swap_map"
   from Kairui Song offers memory savings by removing the static swap_map.
   It also yields some CPU savings and implements several cleanups.
 
 - The 2 patch series "mm: memfd_luo: preserve file seals" from Pratyush
   Yadav adds file seal preservation to LUO's memfd code.
 
 - The 2 patch series "mm: zswap: add per-memcg stat for incompressible
   pages" from Jiayuan Chen adds additional userspace stats reportng to
   zswap.
 
 - The 4 patch series "arch, mm: consolidate empty_zero_page" from Mike
   Rapoport implements some cleanups for our handling of ZERO_PAGE() and
   zero_pfn.
 
 - The 2 patch series "mm/kmemleak: Improve scan_should_stop()
   implementation" from Zhongqiu Han provides an robustness improvement and
   some cleanups in the kmemleak code.
 
 - The 4 patch series "Improve khugepaged scan logic" from Vernon Yang
   "improves the khugepaged scan logic and reduces CPU consumption by
   prioritizing scanning tasks that access memory frequently".
 
 - The 2 patch series "Make KHO Stateless" from Jason Miu simplifies
   Kexec Handover by "transitioning KHO from an xarray-based metadata
   tracking system with serialization to a radix tree data structure that
   can be passed directly to the next kernel"
 
 - The 3 patch series "mm: vmscan: add PID and cgroup ID to vmscan
   tracepoints" from Thomas Ballasi and Steven Rostedt enhances vmscan's
   tracepointing.
 
 - The 5 patch series "mm: arch/shstk: Common shadow stack mapping helper
   and VM_NOHUGEPAGE" from Catalin Marinas is a cleanup for the shadow
   stack code: remove per-arch code in favour of a generic implementation.
 
 - The 2 patch series "Fix KASAN support for KHO restored vmalloc
   regions" from Pasha Tatashin fixes a WARN() which can be emitted the KHO
   restores a vmalloc area.
 
 - The 4 patch series "mm: Remove stray references to pagevec" from Tal
   Zussman provides several cleanups, mainly udpating references to "struct
   pagevec", which became folio_batch three years ago.
 
 - The 17 patch series "mm: Eliminate fake head pages from vmemmap
   optimization" from Kiryl Shutsemau simplifies the HugeTLB vmemmap
   optimization (HVO) by changing how tail pages encode their relationship
   to the head page.
 
 - The 2 patch series "mm/damon/core: improve DAMOS quota efficiency for
   core layer filters" from SeongJae Park improves two problematic
   behaviors of DAMOS that makes it less efficient when core layer filters
   are used.
 
 - The 3 patch series "mm/damon: strictly respect min_nr_regions" from
   SeongJae Park improves DAMON usability by extending the treatment of the
   min_nr_regions user-settable parameter.
 
 - The 3 patch series "mm/page_alloc: pcp locking cleanup" from Vlastimil
   Babka is a proper fix for a previously hotfixed SMP=n issue.  Code
   simplifications and cleanups ennsed.
 
 - The 16 patch series "mm: cleanups around unmapping / zapping" from
   David Hildenbrand implements "a bunch of cleanups around unmapping and
   zapping.  Mostly simplifications, code movements, documentation and
   renaming of zapping functions".
 
 - The 6 patch series "support batched checking of the young flag for
   MGLRU" from Baolin Wang supports batched checking of the young flag for
   MGLRU.  It's part cleanups; one benchmark shows large performance
   benefits for arm64.
 
 - The 5 patch series "memcg: obj stock and slab stat caching cleanups"
   from Johannes Weiner provides memcg cleanup and robustness improvements.
 
 - The 5 patch series "Allow order zero pages in page reporting" from
   Yuvraj Sakshith enhances page_reporting's free page reporting - it is
   presently and undesirably order-0 pages when reporting free memory.
 
 - The 6 patch series "mm: vma flag tweaks" from Lorenzo Stoakes is
   cleanup work following from the recent conversion of the VMA flags to a
   bitmap.
 
 - The 10 patch series "mm/damon: add optional debugging-purpose sanity
   checks" from SeongJae Park adds some more developer-facing debug checks
   into DAMON core.
 
 - The 2 patch series "mm/damon: test and document power-of-2
   min_region_sz requirement" from SeongJae Park adds an additional DAMON
   kunit test and makes some adjustments to the addr_unit parameter
   handling.
 
 - The 3 patch series "mm/damon/core: make passed_sample_intervals
   comparisons overflow-safe" from SeongJae Park fixes a hard-to-hit time
   overflow issue in DAMON core.
 
 - The 7 patch series "mm/damon: improve/fixup/update ratio calculation,
   test and documentation" from SeongJae Park is a "batch of misc/minor
   improvements and fixups" for DAMON.
 
 - The 4 patch series "mm: move vma_(kernel|mmu)_pagesize() out of
   hugetlb.c" from David Hildenbrand fixes a possible issue with dax-device
   when CONFIG_HUGETLB=n.  Some code movement was required.
 
 - The 6 patch series "zram: recompression cleanups and tweaks" from
   Sergey Senozhatsky provides "a somewhat random mix of fixups,
   recompression cleanups and improvements" in the zram code.
 
 - The 11 patch series "mm/damon: support multiple goal-based quota
   tuning algorithms" from SeongJae Park extend DAMOS quotas goal
   auto-tuning to support multiple tuning algorithms that users can select.
 
 - The 4 patch series "mm: thp: reduce unnecessary
   start_stop_khugepaged()" from Breno Leitao fixes the khugpaged sysfs
   handling so we no longer spam the logs with reams of junk when
   starting/stopping khugepaged.
 
 - The 3 patch series "mm: improve map count checks" from Lorenzo Stoakes
   provides some cleanups and slight fixes in the mremap, mmap and vma
   code.
 
 - The 5 patch series "mm/damon: support addr_unit on default monitoring
   targets for modules" from SeongJae Park extends the use of DAMON core's
   addr_unit tunable.
 
 - The 5 patch series "mm: khugepaged cleanups and mTHP prerequisites"
   from Nico Pache provides cleanups in the khugepaged and is a base for
   Nico's planned khugepaged mTHP support.
 
 - The 15 patch series "mm: memory hot(un)plug and SPARSEMEM cleanups"
   from David Hildenbrand implements code movement and cleanups in the
   memhotplug and sparsemem code.
 
 - The 2 patch series "mm: remove CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE and
   cleanup CONFIG_MIGRATION" from David Hildenbrand rationalizes some
   memhotplug Kconfig support.
 
 - The 6 patch series "change young flag check functions to return bool"
   from Baolin Wang is "a cleanup patchset to change all young flag check
   functions to return bool".
 
 - The 3 patch series "mm/damon/sysfs: fix memory leak and NULL
   dereference issues" from Josh Law and SeongJae Park fixes a few
   potential DAMON bugs.
 
 - The 25 patch series "mm/vma: convert vm_flags_t to vma_flags_t in vma
   code" from "converts a lot of the existing use of the legacy vm_flags_t
   data type to the new vma_flags_t type which replaces it".  Mainly in the
   vma code.
 
 - The 21 patch series "mm: expand mmap_prepare functionality and usage"
   from Lorenzo Stoakes "expands the mmap_prepare functionality, which is
   intended to replace the deprecated f_op->mmap hook which has been the
   source of bugs and security issues for some time".  Cleanups,
   documentation, extension of mmap_prepare into filesystem drivers.
 
 - The 13 patch series "mm/huge_memory: refactor zap_huge_pmd()" from
   Lorenzo Stoakes simplifies and cleans up zap_huge_pmd().  Additional
   cleanups around vm_normal_folio_pmd() and the softleaf functionality are
   performed.
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Merge tag 'mm-stable-2026-04-13-21-45' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:

 - "maple_tree: Replace big node with maple copy" (Liam Howlett)

   Mainly prepararatory work for ongoing development but it does reduce
   stack usage and is an improvement.

 - "mm, swap: swap table phase III: remove swap_map" (Kairui Song)

   Offers memory savings by removing the static swap_map. It also yields
   some CPU savings and implements several cleanups.

 - "mm: memfd_luo: preserve file seals" (Pratyush Yadav)

   File seal preservation to LUO's memfd code

 - "mm: zswap: add per-memcg stat for incompressible pages" (Jiayuan
   Chen)

   Additional userspace stats reportng to zswap

 - "arch, mm: consolidate empty_zero_page" (Mike Rapoport)

   Some cleanups for our handling of ZERO_PAGE() and zero_pfn

 - "mm/kmemleak: Improve scan_should_stop() implementation" (Zhongqiu
   Han)

   A robustness improvement and some cleanups in the kmemleak code

 - "Improve khugepaged scan logic" (Vernon Yang)

   Improve khugepaged scan logic and reduce CPU consumption by
   prioritizing scanning tasks that access memory frequently

 - "Make KHO Stateless" (Jason Miu)

   Simplify Kexec Handover by transitioning KHO from an xarray-based
   metadata tracking system with serialization to a radix tree data
   structure that can be passed directly to the next kernel

 - "mm: vmscan: add PID and cgroup ID to vmscan tracepoints" (Thomas
   Ballasi and Steven Rostedt)

   Enhance vmscan's tracepointing

 - "mm: arch/shstk: Common shadow stack mapping helper and
   VM_NOHUGEPAGE" (Catalin Marinas)

   Cleanup for the shadow stack code: remove per-arch code in favour of
   a generic implementation

 - "Fix KASAN support for KHO restored vmalloc regions" (Pasha Tatashin)

   Fix a WARN() which can be emitted the KHO restores a vmalloc area

 - "mm: Remove stray references to pagevec" (Tal Zussman)

   Several cleanups, mainly udpating references to "struct pagevec",
   which became folio_batch three years ago

 - "mm: Eliminate fake head pages from vmemmap optimization" (Kiryl
   Shutsemau)

   Simplify the HugeTLB vmemmap optimization (HVO) by changing how tail
   pages encode their relationship to the head page

 - "mm/damon/core: improve DAMOS quota efficiency for core layer
   filters" (SeongJae Park)

   Improve two problematic behaviors of DAMOS that makes it less
   efficient when core layer filters are used

 - "mm/damon: strictly respect min_nr_regions" (SeongJae Park)

   Improve DAMON usability by extending the treatment of the
   min_nr_regions user-settable parameter

 - "mm/page_alloc: pcp locking cleanup" (Vlastimil Babka)

   The proper fix for a previously hotfixed SMP=n issue. Code
   simplifications and cleanups ensued

 - "mm: cleanups around unmapping / zapping" (David Hildenbrand)

   A bunch of cleanups around unmapping and zapping. Mostly
   simplifications, code movements, documentation and renaming of
   zapping functions

 - "support batched checking of the young flag for MGLRU" (Baolin Wang)

   Batched checking of the young flag for MGLRU. It's part cleanups; one
   benchmark shows large performance benefits for arm64

 - "memcg: obj stock and slab stat caching cleanups" (Johannes Weiner)

   memcg cleanup and robustness improvements

 - "Allow order zero pages in page reporting" (Yuvraj Sakshith)

   Enhance free page reporting - it is presently and undesirably order-0
   pages when reporting free memory.

 - "mm: vma flag tweaks" (Lorenzo Stoakes)

   Cleanup work following from the recent conversion of the VMA flags to
   a bitmap

 - "mm/damon: add optional debugging-purpose sanity checks" (SeongJae
   Park)

   Add some more developer-facing debug checks into DAMON core

 - "mm/damon: test and document power-of-2 min_region_sz requirement"
   (SeongJae Park)

   An additional DAMON kunit test and makes some adjustments to the
   addr_unit parameter handling

 - "mm/damon/core: make passed_sample_intervals comparisons
   overflow-safe" (SeongJae Park)

   Fix a hard-to-hit time overflow issue in DAMON core

 - "mm/damon: improve/fixup/update ratio calculation, test and
   documentation" (SeongJae Park)

   A batch of misc/minor improvements and fixups for DAMON

 - "mm: move vma_(kernel|mmu)_pagesize() out of hugetlb.c" (David
   Hildenbrand)

   Fix a possible issue with dax-device when CONFIG_HUGETLB=n. Some code
   movement was required.

 - "zram: recompression cleanups and tweaks" (Sergey Senozhatsky)

   A somewhat random mix of fixups, recompression cleanups and
   improvements in the zram code

 - "mm/damon: support multiple goal-based quota tuning algorithms"
   (SeongJae Park)

   Extend DAMOS quotas goal auto-tuning to support multiple tuning
   algorithms that users can select

 - "mm: thp: reduce unnecessary start_stop_khugepaged()" (Breno Leitao)

   Fix the khugpaged sysfs handling so we no longer spam the logs with
   reams of junk when starting/stopping khugepaged

 - "mm: improve map count checks" (Lorenzo Stoakes)

   Provide some cleanups and slight fixes in the mremap, mmap and vma
   code

 - "mm/damon: support addr_unit on default monitoring targets for
   modules" (SeongJae Park)

   Extend the use of DAMON core's addr_unit tunable

 - "mm: khugepaged cleanups and mTHP prerequisites" (Nico Pache)

   Cleanups to khugepaged and is a base for Nico's planned khugepaged
   mTHP support

 - "mm: memory hot(un)plug and SPARSEMEM cleanups" (David Hildenbrand)

   Code movement and cleanups in the memhotplug and sparsemem code

 - "mm: remove CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE and cleanup
   CONFIG_MIGRATION" (David Hildenbrand)

   Rationalize some memhotplug Kconfig support

 - "change young flag check functions to return bool" (Baolin Wang)

   Cleanups to change all young flag check functions to return bool

 - "mm/damon/sysfs: fix memory leak and NULL dereference issues" (Josh
   Law and SeongJae Park)

   Fix a few potential DAMON bugs

 - "mm/vma: convert vm_flags_t to vma_flags_t in vma code" (Lorenzo
   Stoakes)

   Convert a lot of the existing use of the legacy vm_flags_t data type
   to the new vma_flags_t type which replaces it. Mainly in the vma
   code.

 - "mm: expand mmap_prepare functionality and usage" (Lorenzo Stoakes)

   Expand the mmap_prepare functionality, which is intended to replace
   the deprecated f_op->mmap hook which has been the source of bugs and
   security issues for some time. Cleanups, documentation, extension of
   mmap_prepare into filesystem drivers

 - "mm/huge_memory: refactor zap_huge_pmd()" (Lorenzo Stoakes)

   Simplify and clean up zap_huge_pmd(). Additional cleanups around
   vm_normal_folio_pmd() and the softleaf functionality are performed.

* tag 'mm-stable-2026-04-13-21-45' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (369 commits)
  mm: fix deferred split queue races during migration
  mm/khugepaged: fix issue with tracking lock
  mm/huge_memory: add and use has_deposited_pgtable()
  mm/huge_memory: add and use normal_or_softleaf_folio_pmd()
  mm: add softleaf_is_valid_pmd_entry(), pmd_to_softleaf_folio()
  mm/huge_memory: separate out the folio part of zap_huge_pmd()
  mm/huge_memory: use mm instead of tlb->mm
  mm/huge_memory: remove unnecessary sanity checks
  mm/huge_memory: deduplicate zap deposited table call
  mm/huge_memory: remove unnecessary VM_BUG_ON_PAGE()
  mm/huge_memory: add a common exit path to zap_huge_pmd()
  mm/huge_memory: handle buggy PMD entry in zap_huge_pmd()
  mm/huge_memory: have zap_huge_pmd return a boolean, add kdoc
  mm/huge: avoid big else branch in zap_huge_pmd()
  mm/huge_memory: simplify vma_is_specal_huge()
  mm: on remap assert that input range within the proposed VMA
  mm: add mmap_action_map_kernel_pages[_full]()
  uio: replace deprecated mmap hook with mmap_prepare in uio_info
  drivers: hv: vmbus: replace deprecated mmap hook with mmap_prepare
  mm: allow handling of stacked mmap_prepare hooks in more drivers
  ...
 2026-04-15 12:59:16 -07:00
Linus Torvalds
7de6b4a246 workqueue: Changes for v7.1 
- New default WQ_AFFN_CACHE_SHARD affinity scope subdivides LLCs into
   smaller shards to improve scalability on machines with many CPUs per
   LLC.
 
 - Misc: system_dfl_long_wq for long unbound works, devm_alloc_workqueue()
   for device-managed allocation, sysfs exposure for ordered workqueues and
   the EFI workqueue, removal of HK_TYPE_WQ from wq_unbound_cpumask, and
   various small fixes.
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Merge tag 'wq-for-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

Pull workqueue updates from Tejun Heo:

 - New default WQ_AFFN_CACHE_SHARD affinity scope subdivides LLCs into
   smaller shards to improve scalability on machines with many CPUs per
   LLC

 - Misc:
    - system_dfl_long_wq for long unbound works
    - devm_alloc_workqueue() for device-managed allocation
    - sysfs exposure for ordered workqueues and the EFI workqueue
    - removal of HK_TYPE_WQ from wq_unbound_cpumask
    - various small fixes

* tag 'wq-for-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: (21 commits)
  workqueue: validate cpumask_first() result in llc_populate_cpu_shard_id()
  workqueue: use NR_STD_WORKER_POOLS instead of hardcoded value
  workqueue: avoid unguarded 64-bit division
  docs: workqueue: document WQ_AFFN_CACHE_SHARD affinity scope
  workqueue: add test_workqueue benchmark module
  tools/workqueue: add CACHE_SHARD support to wq_dump.py
  workqueue: set WQ_AFFN_CACHE_SHARD as the default affinity scope
  workqueue: add WQ_AFFN_CACHE_SHARD affinity scope
  workqueue: fix typo in WQ_AFFN_SMT comment
  workqueue: Remove HK_TYPE_WQ from affecting wq_unbound_cpumask
  workqueue: unlink pwqs from wq->pwqs list in alloc_and_link_pwqs() error path
  workqueue: Remove NULL wq WARN in __queue_delayed_work()
  workqueue: fix parse_affn_scope() prefix matching bug
  workqueue: devres: Add device-managed allocate workqueue
  workqueue: Add system_dfl_long_wq for long unbound works
  tools/workqueue/wq_dump.py: add NODE prefix to all node columns
  tools/workqueue/wq_dump.py: fix column alignment in node_nr/max_active section
  tools/workqueue/wq_dump.py: remove backslash separator from node_nr/max_active header
  efi: Allow to expose the workqueue via sysfs
  workqueue: Allow to expose ordered workqueues via sysfs
  ...
 2026-04-15 10:32:08 -07:00
Linus Torvalds
00c6649baf [GIT PULL for v7.1] media updates 
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Merge tag 'media/v7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media updates from Mauro Carvalho Chehab:

 - new CSI tegra support, covering Tegra20 and Tegra30

 - new camera sensor drivers: T4ka3 and ov2732

 - m88ds3103: add 3103c chip support

 - uvcvideo: add support for Intel RealSense D436/D555 and P010 pixel format

 - synopsys csi2rx: add i.MX93 support

 - imx8-isi: add i.MX95 support

 - imx8mq-mipi-csi2: add i.MX8ULP support

 - dw100: add V4L2 requests support

 - support for DTV devices from Hauppauge got some improvements

 - media staging: dropped starfive-camss driver

 - media docs: document multi-committers model and improve maint profile

 - media core:
    - add v4l2_subdev_get_frame_desc_passthrough() helper
    - improve error handling in fwnode parsing

 - lots of driver fixes, cleanups and improvements

* tag 'media/v7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (251 commits)
  Revert "media: cx231xx: add USB ID 2040:8360 for Hauppauge WinTV-HVR-935"
  media: synopsys: csi2rx: add i.MX93 support
  media: dt-bindings: add NXP i.MX93 compatible string
  media: synopsys: csi2rx: Use enum and u32 array for register offsets
  media: synopsys: csi2rx: implement .get_frame_desc() callback
  media: synopsys: csi2rx: only check errors from devm_clk_bulk_get_all()
  media: synopsys: csi2rx: use devm_reset_control_get_optional_exclusive()
  media: i2c: imx283: add support for non-continuous MIPI clock mode
  media: i2c: ov08d10: add support for 24 MHz input clock
  media: i2c: ov08d10: add support for reset and power management
  media: i2c: ov08d10: add support for binding via device tree
  dt-bindings: media: i2c: document Omnivision OV08D10 CMOS image sensor
  media: i2c: ov08d10: add missing newline to prints
  media: i2c: ov08d10: fix some typos in comments
  media: i2c: ov08d10: remove duplicate register write
  media: i2c: ov08d10: fix image vertical start setting
  media: i2c: ov08d10: fix runtime PM handling in probe
  staging: media: ipu7: Update TODO
  media: Add t4ka3 camera sensor driver
  media: i2c: Add ov2732 image sensor driver
  ...
 2026-04-15 08:32:10 -07:00
Randy Dunlap
5cc6421aaa doc: watchdog: fix typos etc 
Correct typos in lockup-watchdogs.rst.

Link: https://lkml.kernel.org/r/20260408213523.2707947-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Björn Persson <Bjorn@xn--rombobjrn-67a.se>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-04-15 02:15:03 -07:00
Linus Torvalds
91a4855d6c Networking changes for 7.1. 
Core & protocols
 ----------------
 
  - Support HW queue leasing, allowing containers to be granted access
    to HW queues for zero-copy operations and AF_XDP.
 
  - Number of code moves to help the compiler with inlining.
    Avoid output arguments for returning drop reason where possible.
 
  - Rework drop handling within qdiscs to include more metadata
    about the reason and dropping qdisc in the tracepoints.
 
  - Remove the rtnl_lock use from IP Multicast Routing.
 
  - Pack size information into the Rx Flow Steering table pointer
    itself. This allows making the table itself a flat array of u32s,
    thus making the table allocation size a power of two.
 
  - Report TCP delayed ack timer information via socket diag.
 
  - Add ip_local_port_step_width sysctl to allow distributing the randomly
    selected ports more evenly throughout the allowed space.
 
  - Add support for per-route tunsrc in IPv6 segment routing.
 
  - Start work of switching sockopt handling to iov_iter.
 
  - Improve dynamic recvbuf sizing in MPTCP, limit burstiness and avoid
    buffer size drifting up.
 
  - Support MSG_EOR in MPTCP.
 
  - Add stp_mode attribute to the bridge driver for STP mode selection.
    This addresses concerns about call_usermodehelper() usage.
 
  - Remove UDP-Lite support (as announced in 2023).
 
  - Remove support for building IPv6 as a module.
    Remove the now unnecessary function calling indirection.
 
 Cross-tree stuff
 ----------------
 
  - Move Michael MIC code from generic crypto into wireless,
    it's considered insecure but some WiFi networks still need it.
 
 Netfilter
 ---------
 
  - Switch nft_fib_ipv6 module to no longer need temporary dst_entry
    object allocations by using fib6_lookup() + RCU.
    Florian W reports this gets us ~13% higher packet rate.
 
  - Convert IPVS's global __ip_vs_mutex to per-net service_mutex and
    switch the service tables to be per-net. Convert some code that
    walks the service lists to use RCU instead of the service_mutex.
 
  - Add more opinionated input validation to lower security exposure.
 
  - Make IPVS hash tables to be per-netns and resizable.
 
 Wireless
 --------
 
  - Finished assoc frame encryption/EPPKE/802.1X-over-auth.
 
  - Radar detection improvements.
 
  - Add 6 GHz incumbent signal detection APIs.
 
  - Multi-link support for FILS, probe response templates and
    client probing.
 
  - New APIs and mac80211 support for NAN (Neighbor Aware Networking,
    aka Wi-Fi Aware) so less work must be in firmware.
 
 Driver API
 ----------
 
  - Add numerical ID for devlink instances (to avoid having to create
    fake bus/device pairs just to have an ID). Support shared devlink
    instances which span multiple PFs.
 
  - Add standard counters for reporting pause storm events
    (implement in mlx5 and fbnic).
 
  - Add configuration API for completion writeback buffering
    (implement in mana).
 
  - Support driver-initiated change of RSS context sizes.
 
  - Support DPLL monitoring input frequency (implement in zl3073x).
 
  - Support per-port resources in devlink (implement in mlx5).
 
 Misc
 ----
 
  - Expand the YAML spec for Netfilter.
 
 Drivers
 -------
 
  - Software:
    - macvlan: support multicast rx for bridge ports with shared source
      MAC address
    - team: decouple receive and transmit enablement for IEEE 802.3ad
      LACP "independent control"
 
  - Ethernet high-speed NICs:
    - nVidia/Mellanox:
      - support high order pages in zero-copy mode (for payload
        coalescing)
      - support multiple packets in a page (for systems with 64kB pages)
    - Broadcom 25-400GE (bnxt):
      - implement XDP RSS hash metadata extraction
      - add software fallback for UDP GSO, lowering the IOMMU cost
    - Broadcom 800GE (bnge):
      - add link status and configuration handling
      - add various HW and SW statistics
    - Marvell/Cavium:
      - NPC HW block support for cn20k
    - Huawei (hinic3):
      - add mailbox / control queue
      - add rx VLAN offload
      - add driver info and link management
 
  - Ethernet NICs:
    - Marvell/Aquantia:
      - support reading SFP module info on some AQC100 cards
    - Realtek PCI (r8169):
      - add support for RTL8125cp
    - Realtek USB (r8152):
      - support for the RTL8157 5Gbit chip
      - add 2500baseT EEE status/configuration support
 
  - Ethernet NICs embedded and off-the-shelf IP:
    - Synopsys (stmmac):
      - cleanup and reorganize SerDes handling and PCS support
      - cleanup descriptor handling and per-platform data
      - cleanup and consolidate MDIO defines and handling
      - shrink driver memory use for internal structures
      - improve Tx IRQ coalescing
      - improve TCP segmentation handling
      - add support for Spacemit K3
    - Cadence (macb):
      - support PHYs that have inband autoneg disabled with GEM
      - support IEEE 802.3az EEE
      - rework usrio capabilities and handling
    - AMD (xgbe):
      - improve power management for S0i3
      - improve TX resilience for link-down handling
 
  - Virtual:
    - Google cloud vNIC:
      - support larger ring sizes in DQO-QPL mode
      - improve HW-GRO handling
      - support UDP GSO for DQO format
    - PCIe NTB:
      - support queue count configuration
 
  - Ethernet PHYs:
    - automatically disable PHY autonomous EEE if MAC is in charge
    - Broadcom:
      - add BCM84891/BCM84892 support
    - Micrel:
      - support for LAN9645X internal PHY
    - Realtek:
      - add RTL8224 pair order support
      - support PHY LEDs on RTL8211F-VD
      - support spread spectrum clocking (SSC)
    - Maxlinear:
      - add PHY-level statistics via ethtool
 
  - Ethernet switches:
    - Maxlinear (mxl862xx):
      - support for bridge offloading
      - support for VLANs
      - support driver statistics
 
  - Bluetooth:
    - large number of fixes and new device IDs
    - Mediatek:
      - support MT6639 (MT7927)
      - support MT7902 SDIO
 
  - WiFi:
    - Intel (iwlwifi):
      - UNII-9 and continuing UHR work
    - MediaTek (mt76):
      - mt7996/mt7925 MLO fixes/improvements
      - mt7996 NPU support (HW eth/wifi traffic offload)
    - Qualcomm (ath12k):
      - monitor mode support on IPQ5332
      - basic hwmon temperature reporting
      - support IPQ5424
    - Realtek:
      - add USB RX aggregation to improve performance
      - add USB TX flow control by tracking in-flight URBs
 
  - Cellular:
    - IPA v5.2 support
 
 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-next-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
 "Core & protocols:

   - Support HW queue leasing, allowing containers to be granted access
     to HW queues for zero-copy operations and AF_XDP

   - Number of code moves to help the compiler with inlining. Avoid
     output arguments for returning drop reason where possible

   - Rework drop handling within qdiscs to include more metadata about
     the reason and dropping qdisc in the tracepoints

   - Remove the rtnl_lock use from IP Multicast Routing

   - Pack size information into the Rx Flow Steering table pointer
     itself. This allows making the table itself a flat array of u32s,
     thus making the table allocation size a power of two

   - Report TCP delayed ack timer information via socket diag

   - Add ip_local_port_step_width sysctl to allow distributing the
     randomly selected ports more evenly throughout the allowed space

   - Add support for per-route tunsrc in IPv6 segment routing

   - Start work of switching sockopt handling to iov_iter

   - Improve dynamic recvbuf sizing in MPTCP, limit burstiness and avoid
     buffer size drifting up

   - Support MSG_EOR in MPTCP

   - Add stp_mode attribute to the bridge driver for STP mode selection.
     This addresses concerns about call_usermodehelper() usage

   - Remove UDP-Lite support (as announced in 2023)

   - Remove support for building IPv6 as a module. Remove the now
     unnecessary function calling indirection

  Cross-tree stuff:

   - Move Michael MIC code from generic crypto into wireless, it's
     considered insecure but some WiFi networks still need it

  Netfilter:

   - Switch nft_fib_ipv6 module to no longer need temporary dst_entry
     object allocations by using fib6_lookup() + RCU.

     Florian W reports this gets us ~13% higher packet rate

   - Convert IPVS's global __ip_vs_mutex to per-net service_mutex and
     switch the service tables to be per-net. Convert some code that
     walks the service lists to use RCU instead of the service_mutex

   - Add more opinionated input validation to lower security exposure

   - Make IPVS hash tables to be per-netns and resizable

  Wireless:

   - Finished assoc frame encryption/EPPKE/802.1X-over-auth

   - Radar detection improvements

   - Add 6 GHz incumbent signal detection APIs

   - Multi-link support for FILS, probe response templates and client
     probing

   - New APIs and mac80211 support for NAN (Neighbor Aware Networking,
     aka Wi-Fi Aware) so less work must be in firmware

  Driver API:

   - Add numerical ID for devlink instances (to avoid having to create
     fake bus/device pairs just to have an ID). Support shared devlink
     instances which span multiple PFs

   - Add standard counters for reporting pause storm events (implement
     in mlx5 and fbnic)

   - Add configuration API for completion writeback buffering (implement
     in mana)

   - Support driver-initiated change of RSS context sizes

   - Support DPLL monitoring input frequency (implement in zl3073x)

   - Support per-port resources in devlink (implement in mlx5)

  Misc:

   - Expand the YAML spec for Netfilter

  Drivers

   - Software:
      - macvlan: support multicast rx for bridge ports with shared
        source MAC address
      - team: decouple receive and transmit enablement for IEEE 802.3ad
        LACP "independent control"

   - Ethernet high-speed NICs:
      - nVidia/Mellanox:
         - support high order pages in zero-copy mode (for payload
           coalescing)
         - support multiple packets in a page (for systems with 64kB
           pages)
      - Broadcom 25-400GE (bnxt):
         - implement XDP RSS hash metadata extraction
         - add software fallback for UDP GSO, lowering the IOMMU cost
      - Broadcom 800GE (bnge):
         - add link status and configuration handling
         - add various HW and SW statistics
      - Marvell/Cavium:
         - NPC HW block support for cn20k
      - Huawei (hinic3):
         - add mailbox / control queue
         - add rx VLAN offload
         - add driver info and link management

   - Ethernet NICs:
      - Marvell/Aquantia:
         - support reading SFP module info on some AQC100 cards
      - Realtek PCI (r8169):
         - add support for RTL8125cp
      - Realtek USB (r8152):
         - support for the RTL8157 5Gbit chip
         - add 2500baseT EEE status/configuration support

   - Ethernet NICs embedded and off-the-shelf IP:
      - Synopsys (stmmac):
         - cleanup and reorganize SerDes handling and PCS support
         - cleanup descriptor handling and per-platform data
         - cleanup and consolidate MDIO defines and handling
         - shrink driver memory use for internal structures
         - improve Tx IRQ coalescing
         - improve TCP segmentation handling
         - add support for Spacemit K3
      - Cadence (macb):
         - support PHYs that have inband autoneg disabled with GEM
         - support IEEE 802.3az EEE
         - rework usrio capabilities and handling
      - AMD (xgbe):
         - improve power management for S0i3
         - improve TX resilience for link-down handling

   - Virtual:
      - Google cloud vNIC:
         - support larger ring sizes in DQO-QPL mode
         - improve HW-GRO handling
         - support UDP GSO for DQO format
      - PCIe NTB:
         - support queue count configuration

   - Ethernet PHYs:
      - automatically disable PHY autonomous EEE if MAC is in charge
      - Broadcom:
         - add BCM84891/BCM84892 support
      - Micrel:
         - support for LAN9645X internal PHY
      - Realtek:
         - add RTL8224 pair order support
         - support PHY LEDs on RTL8211F-VD
         - support spread spectrum clocking (SSC)
      - Maxlinear:
         - add PHY-level statistics via ethtool

   - Ethernet switches:
      - Maxlinear (mxl862xx):
         - support for bridge offloading
         - support for VLANs
         - support driver statistics

   - Bluetooth:
      - large number of fixes and new device IDs
      - Mediatek:
         - support MT6639 (MT7927)
         - support MT7902 SDIO

   - WiFi:
      - Intel (iwlwifi):
         - UNII-9 and continuing UHR work
      - MediaTek (mt76):
         - mt7996/mt7925 MLO fixes/improvements
         - mt7996 NPU support (HW eth/wifi traffic offload)
      - Qualcomm (ath12k):
         - monitor mode support on IPQ5332
         - basic hwmon temperature reporting
         - support IPQ5424
      - Realtek:
         - add USB RX aggregation to improve performance
         - add USB TX flow control by tracking in-flight URBs

   - Cellular:
      - IPA v5.2 support"

* tag 'net-next-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1561 commits)
  net: pse-pd: fix kernel-doc function name for pse_control_find_by_id()
  wireguard: device: use exit_rtnl callback instead of manual rtnl_lock in pre_exit
  wireguard: allowedips: remove redundant space
  tools: ynl: add sample for wireguard
  wireguard: allowedips: Use kfree_rcu() instead of call_rcu()
  MAINTAINERS: Add netkit selftest files
  selftests/net: Add additional test coverage in nk_qlease
  selftests/net: Split netdevsim tests from HW tests in nk_qlease
  tools/ynl: Make YnlFamily closeable as a context manager
  net: airoha: Add missing PPE configurations in airoha_ppe_hw_init()
  net: airoha: Fix VIP configuration for AN7583 SoC
  net: caif: clear client service pointer on teardown
  net: strparser: fix skb_head leak in strp_abort_strp()
  net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()
  selftests/bpf: add test for xdp_master_redirect with bond not up
  net, bpf: fix null-ptr-deref in xdp_master_redirect() for down master
  net: airoha: Remove PCE_MC_EN_MASK bit in REG_FE_PCE_CFG configuration
  sctp: disable BH before calling udp_tunnel_xmit_skb()
  sctp: fix missing encap_port propagation for GSO fragments
  net: airoha: Rely on net_device pointer in ETS callbacks
  ...
 2026-04-14 18:36:10 -07:00
Linus Torvalds
c43267e679 arm64 updates for 7.1: 
Core features:
 
  - Add support for FEAT_LSUI, allowing futex atomic operations without
    toggling Privileged Access Never (PAN)
 
  - Further refactor the arm64 exception handling code towards the
    generic entry infrastructure
 
  - Optimise __READ_ONCE() with CONFIG_LTO=y and allow alias analysis
    through it
 
 Memory management:
 
  - Refactor the arm64 TLB invalidation API and implementation for better
    control over barrier placement and level-hinted invalidation
 
  - Enable batched TLB flushes during memory hot-unplug
 
  - Fix rodata=full block mapping support for realm guests (when
    BBML2_NOABORT is available)
 
 Perf and PMU:
 
  - Add support for a whole bunch of system PMUs featured in NVIDIA's
    Tegra410 SoC (cspmu extensions for the fabric and PCIe, new drivers
    for CPU/C2C memory latency PMUs)
 
  - Clean up iomem resource handling in the Arm CMN driver
 
  - Fix signedness handling of AA64DFR0.{PMUVer,PerfMon}
 
 MPAM (Memory Partitioning And Monitoring):
 
  - Add architecture context-switch and hiding of the feature from KVM
 
  - Add interface to allow MPAM to be exposed to user-space using resctrl
 
  - Add errata workaround for some existing platforms
 
  - Add documentation for using MPAM and what shape of platforms can use
    resctrl
 
 Miscellaneous:
 
  - Check DAIF (and PMR, where relevant) at task-switch time
 
  - Skip TFSR_EL1 checks and barriers in synchronous MTE tag check mode
    (only relevant to asynchronous or asymmetric tag check modes)
 
  - Remove a duplicate allocation in the kexec code
 
  - Remove redundant save/restore of SCS SP on entry to/from EL0
 
  - Generate the KERNEL_HWCAP_ definitions from the arm64 hwcap
    descriptions
 
  - Add kselftest coverage for cmpbr_sigill()
 
  - Update sysreg definitions
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 updates from Catalin Marinas:
 "The biggest changes are MPAM enablement in drivers/resctrl and new PMU
  support under drivers/perf.

  On the core side, FEAT_LSUI lets futex atomic operations with EL0
  permissions, avoiding PAN toggling.

  The rest is mostly TLB invalidation refactoring, further generic entry
  work, sysreg updates and a few fixes.

  Core features:

   - Add support for FEAT_LSUI, allowing futex atomic operations without
     toggling Privileged Access Never (PAN)

   - Further refactor the arm64 exception handling code towards the
     generic entry infrastructure

   - Optimise __READ_ONCE() with CONFIG_LTO=y and allow alias analysis
     through it

  Memory management:

   - Refactor the arm64 TLB invalidation API and implementation for
     better control over barrier placement and level-hinted invalidation

   - Enable batched TLB flushes during memory hot-unplug

   - Fix rodata=full block mapping support for realm guests (when
     BBML2_NOABORT is available)

  Perf and PMU:

   - Add support for a whole bunch of system PMUs featured in NVIDIA's
     Tegra410 SoC (cspmu extensions for the fabric and PCIe, new drivers
     for CPU/C2C memory latency PMUs)

   - Clean up iomem resource handling in the Arm CMN driver

   - Fix signedness handling of AA64DFR0.{PMUVer,PerfMon}

  MPAM (Memory Partitioning And Monitoring):

   - Add architecture context-switch and hiding of the feature from KVM

   - Add interface to allow MPAM to be exposed to user-space using
     resctrl

   - Add errata workaround for some existing platforms

   - Add documentation for using MPAM and what shape of platforms can
     use resctrl

  Miscellaneous:

   - Check DAIF (and PMR, where relevant) at task-switch time

   - Skip TFSR_EL1 checks and barriers in synchronous MTE tag check mode
     (only relevant to asynchronous or asymmetric tag check modes)

   - Remove a duplicate allocation in the kexec code

   - Remove redundant save/restore of SCS SP on entry to/from EL0

   - Generate the KERNEL_HWCAP_ definitions from the arm64 hwcap
     descriptions

   - Add kselftest coverage for cmpbr_sigill()

   - Update sysreg definitions"

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (109 commits)
  arm64: rsi: use linear-map alias for realm config buffer
  arm64: Kconfig: fix duplicate word in CMDLINE help text
  arm64: mte: Skip TFSR_EL1 checks and barriers in synchronous tag check mode
  arm64/sysreg: Update ID_AA64SMFR0_EL1 description to DDI0601 2025-12
  arm64/sysreg: Update ID_AA64ZFR0_EL1 description to DDI0601 2025-12
  arm64/sysreg: Update ID_AA64FPFR0_EL1 description to DDI0601 2025-12
  arm64/sysreg: Update ID_AA64ISAR2_EL1 description to DDI0601 2025-12
  arm64/sysreg: Update ID_AA64ISAR0_EL1 description to DDI0601 2025-12
  arm64/hwcap: Generate the KERNEL_HWCAP_ definitions for the hwcaps
  arm64: kexec: Remove duplicate allocation for trans_pgd
  ACPI: AGDI: fix missing newline in error message
  arm64: Check DAIF (and PMR) at task-switch time
  arm64: entry: Use split preemption logic
  arm64: entry: Use irqentry_{enter_from,exit_to}_kernel_mode()
  arm64: entry: Consistently prefix arm64-specific wrappers
  arm64: entry: Don't preempt with SError or Debug masked
  entry: Split preemption from irqentry_exit_to_kernel_mode()
  entry: Split kernel mode logic from irqentry_{enter,exit}()
  entry: Move irqentry_enter() prototype later
  entry: Remove local_irq_{enable,disable}_exit_to_user()
  ...
 2026-04-14 16:48:56 -07:00
Linus Torvalds
e9635f2a73 - We made the FRED support an opt-in initially out of fear of it breaking 
machines left and right in the case of a hw bug in the first generation of
   machines supporting it. Now that that the FRED code has seen a lot of
   hammering, flip the logic to be opt-out as is the usual case with new hw
   features
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Merge tag 'x86_fred_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 FRED updates from Borislav Petkov:
 "We made the FRED support an opt-in initially out of fear of it
  breaking machines left and right in the case of a hw bug in the first
  generation of machines supporting it.

  Now that that the FRED code has seen a lot of hammering, flip the
  logic to be opt-out as is the usual case with new hw features"

* tag 'x86_fred_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/fred: Remove kernel log message when initializing exceptions
  x86/fred: Enable FRED by default
 2026-04-14 14:50:51 -07:00
Linus Torvalds
9f2bb6c7b3 - Complete LASS enabling: deal with vsyscall and EFI 
- Clean up CPUID usage in newer Intel audio driver
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Merge tag 'x86_cpu_for_7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 cpu updates from Dave Hansen:

 - Complete LASS enabling: deal with vsyscall and EFI

   The existing Linear Address Space Separation (LASS) support punted
   on support for common EFI and vsyscall configs. Complete the
   implementation by supporting EFI and vsyscall=xonly.

 - Clean up CPUID usage in newer Intel "avs" audio driver and update the
   x86-cpuid-db file

* tag 'x86_cpu_for_7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  tools/x86/kcpuid: Update bitfields to x86-cpuid-db v3.0
  ASoC: Intel: avs: Include CPUID header at file scope
  ASoC: Intel: avs: Check maximum valid CPUID leaf
  x86/cpu: Remove LASS restriction on vsyscall emulation
  x86/vsyscall: Disable LASS if vsyscall mode is set to EMULATE
  x86/vsyscall: Restore vsyscall=xonly mode under LASS
  x86/traps: Consolidate user fixups in the #GP handler
  x86/vsyscall: Reorganize the page fault emulation code
  x86/cpu: Remove LASS restriction on EFI
  x86/efi: Disable LASS while executing runtime services
  x86/cpu: Defer LASS enabling until userspace comes up
 2026-04-14 14:24:45 -07:00
Linus Torvalds
c1fe867b5b Updates for the timer/timekeeping core: 
- A rework of the hrtimer subsystem to reduce the overhead for frequently
     armed timers, especially the hrtick scheduler timer.
 
       - Better timer locality decision
 
       - Simplification of the evaluation of the first expiry time by
         keeping track of the neighbor timers in the RB-tree by providing a
         RB-tree variant with neighbor links. That avoids walking the
         RB-tree on removal to find the next expiry time, but even more
         important allows to quickly evaluate whether a timer which is
         rearmed changes the position in the RB-tree with the modified
         expiry time or not. If not, the dequeue/enqueue sequence which both
         can end up in rebalancing can be completely avoided.
 
       - Deferred reprogramming of the underlying clock event device. This
         optimizes for the situation where a hrtimer callback sets the need
         resched bit. In that case the code attempts to defer the
         re-programming of the clock event device up to the point where the
         scheduler has picked the next task and has the next hrtick timer
         armed. In case that there is no immediate reschedule or soft
         interrupts have to be handled before reaching the reschedule point
         in the interrupt entry code the clock event is reprogrammed in one
         of those code paths to prevent that the timer becomes stale.
 
       - Support for clocksource coupled clockevents
 
       	The TSC deadline timer is coupled to the TSC. The next event is
       	programmed in TSC time. Currently this is done by converting the
       	CLOCK_MONOTONIC based expiry value into a relative timeout,
       	converting it into TSC ticks, reading the TSC adding the delta
       	ticks and writing the deadline MSR.
 
 	As the timekeeping core has the conversion factors for the TSC
 	already, the whole back and forth conversion can be completely
 	avoided. The timekeeping core calculates the reverse conversion
 	factors from nanoseconds to TSC ticks and utilizes the base
 	timestamps of TSC and CLOCK_MONOTONIC which are updated once per
 	tick. This allows a direct conversion into the TSC deadline value
 	without reading the time and as a bonus keeps the deadline
 	conversion in sync with the TSC conversion factors, which are
 	updated by adjtimex() on systems with NTP/PTP enabled.
 
      - Allow inlining of the clocksource read and clockevent write
        functions when they are tiny enough, e.g. on x86 RDTSC and WRMSR.
 
     With all those enhancements in place a hrtick enabled scheduler
     provides the same performance as without hrtick. But also other hrtimer
     users obviously benefit from these optimizations.
 
   - Robustness improvements and cleanups of historical sins in the hrtimer
     and timekeeping code.
 
   - Rewrite of the clocksource watchdog.
 
     The clocksource watchdog code has over time reached the state of an
     impenetrable maze of duct tape and staples. The original design, which was
     made in the context of systems far smaller than today, is based on the
     assumption that the to be monitored clocksource (TSC) can be trivially
     compared against a known to be stable clocksource (HPET/ACPI-PM timer).
 
     Over the years this rather naive approach turned out to have major
     flaws. Long delays between the watchdog invocations can cause wrap
     arounds of the reference clocksource. The access to the reference
     clocksource degrades on large multi-sockets systems dure to
     interconnect congestion. This has been addressed with various
     heuristics which degraded the accuracy of the watchdog to the point
     that it fails to detect actual TSC problems on older hardware which
     exposes slow inter CPU drifts due to firmware manipulating the TSC to
     hide SMI time.
 
     The rewrite addresses this by:
 
       - Restricting the validation against the reference clocksource to the
         boot CPU which is usually closest to the legacy block which
         contains the reference clocksource (HPET/ACPI-PM).
 
       - Do a round robin validation betwen the boot CPU and the other CPUs
         based only on the TSC with an algorithm similar to the TSC
         synchronization code during CPU hotplug.
 
       - Being more leniant versus remote timeouts
 
   - The usual tiny fixes, cleanups and enhancements all over the place
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Merge tag 'timers-core-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timer core updates from Thomas Gleixner:

 - A rework of the hrtimer subsystem to reduce the overhead for
   frequently armed timers, especially the hrtick scheduler timer:

     - Better timer locality decision

     - Simplification of the evaluation of the first expiry time by
       keeping track of the neighbor timers in the RB-tree by providing
       a RB-tree variant with neighbor links. That avoids walking the
       RB-tree on removal to find the next expiry time, but even more
       important allows to quickly evaluate whether a timer which is
       rearmed changes the position in the RB-tree with the modified
       expiry time or not. If not, the dequeue/enqueue sequence which
       both can end up in rebalancing can be completely avoided.

     - Deferred reprogramming of the underlying clock event device. This
       optimizes for the situation where a hrtimer callback sets the
       need resched bit. In that case the code attempts to defer the
       re-programming of the clock event device up to the point where
       the scheduler has picked the next task and has the next hrtick
       timer armed. In case that there is no immediate reschedule or
       soft interrupts have to be handled before reaching the reschedule
       point in the interrupt entry code the clock event is reprogrammed
       in one of those code paths to prevent that the timer becomes
       stale.

     - Support for clocksource coupled clockevents

       The TSC deadline timer is coupled to the TSC. The next event is
       programmed in TSC time. Currently this is done by converting the
       CLOCK_MONOTONIC based expiry value into a relative timeout,
       converting it into TSC ticks, reading the TSC adding the delta
       ticks and writing the deadline MSR.

       As the timekeeping core has the conversion factors for the TSC
       already, the whole back and forth conversion can be completely
       avoided. The timekeeping core calculates the reverse conversion
       factors from nanoseconds to TSC ticks and utilizes the base
       timestamps of TSC and CLOCK_MONOTONIC which are updated once per
       tick. This allows a direct conversion into the TSC deadline value
       without reading the time and as a bonus keeps the deadline
       conversion in sync with the TSC conversion factors, which are
       updated by adjtimex() on systems with NTP/PTP enabled.

     - Allow inlining of the clocksource read and clockevent write
       functions when they are tiny enough, e.g. on x86 RDTSC and WRMSR.

   With all those enhancements in place a hrtick enabled scheduler
   provides the same performance as without hrtick. But also other
   hrtimer users obviously benefit from these optimizations.

 - Robustness improvements and cleanups of historical sins in the
   hrtimer and timekeeping code.

 - Rewrite of the clocksource watchdog.

   The clocksource watchdog code has over time reached the state of an
   impenetrable maze of duct tape and staples. The original design,
   which was made in the context of systems far smaller than today, is
   based on the assumption that the to be monitored clocksource (TSC)
   can be trivially compared against a known to be stable clocksource
   (HPET/ACPI-PM timer).

   Over the years this rather naive approach turned out to have major
   flaws. Long delays between the watchdog invocations can cause wrap
   arounds of the reference clocksource. The access to the reference
   clocksource degrades on large multi-sockets systems dure to
   interconnect congestion. This has been addressed with various
   heuristics which degraded the accuracy of the watchdog to the point
   that it fails to detect actual TSC problems on older hardware which
   exposes slow inter CPU drifts due to firmware manipulating the TSC to
   hide SMI time.

   The rewrite addresses this by:

     - Restricting the validation against the reference clocksource to
       the boot CPU which is usually closest to the legacy block which
       contains the reference clocksource (HPET/ACPI-PM).

     - Do a round robin validation betwen the boot CPU and the other
       CPUs based only on the TSC with an algorithm similar to the TSC
       synchronization code during CPU hotplug.

     - Being more leniant versus remote timeouts

 - The usual tiny fixes, cleanups and enhancements all over the place

* tag 'timers-core-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (75 commits)
  alarmtimer: Access timerqueue node under lock in suspend
  hrtimer: Fix incorrect #endif comment for BITS_PER_LONG check
  posix-timers: Fix stale function name in comment
  timers: Get this_cpu once while clearing the idle state
  clocksource: Rewrite watchdog code completely
  clocksource: Don't use non-continuous clocksources as watchdog
  x86/tsc: Handle CLOCK_SOURCE_VALID_FOR_HRES correctly
  MIPS: Don't select CLOCKSOURCE_WATCHDOG
  parisc: Remove unused clocksource flags
  hrtimer: Add a helper to retrieve a hrtimer from its timerqueue node
  hrtimer: Remove trailing comma after HRTIMER_MAX_CLOCK_BASES
  hrtimer: Mark index and clockid of clock base as const
  hrtimer: Drop unnecessary pointer indirection in hrtimer_expire_entry event
  hrtimer: Drop spurious space in 'enum hrtimer_base_type'
  hrtimer: Don't zero-initialize ret in hrtimer_nanosleep()
  hrtimer: Remove hrtimer_get_expires_ns()
  timekeeping: Mark offsets array as const
  timekeeping/auxclock: Consistently use raw timekeeper for tk_setup_internals()
  timer_list: Print offset as signed integer
  tracing: Use explicit array size instead of sentinel elements in symbol printing
  ...
 2026-04-14 10:27:07 -07:00
Linus Torvalds
5181afcdf9 A busier cycle than I had expected for docs, including: 
- Translations: some overdue updates to the Japanese translations, Chinese
   translations for some of the Rust documentation, and the beginnings of a
   Portuguese translation.
 
 - New documents covering CPU isolation, managed interrupts, debugging
   Python gbb scripts, and more.
 
 - More tooling work from Mauro, reducing docs-build warnings, adding self
   tests, improving man-page output, bringing in a proper C tokenizer to
   replace (some of) the mess of kernel-doc regexes, and more.
 
 - Update and synchronize changes.rst and scripts/ver_linux, and put both
   into alphabetical order.
 
 ...and a long list of documentation updates, typo fixes, and general
 improvements.
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Merge tag 'docs-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/docs/linux

Pull documentation updates from Jonathan Corbet:
 "A busier cycle than I had expected for docs, including:

   - Translations: some overdue updates to the Japanese translations,
     Chinese translations for some of the Rust documentation, and the
     beginnings of a Portuguese translation.

   - New documents covering CPU isolation, managed interrupts, debugging
     Python gbb scripts, and more.

   - More tooling work from Mauro, reducing docs-build warnings, adding
     self tests, improving man-page output, bringing in a proper C
     tokenizer to replace (some of) the mess of kernel-doc regexes, and
     more.

   - Update and synchronize changes.rst and scripts/ver_linux, and put
     both into alphabetical order.

  ... and a long list of documentation updates, typo fixes, and general
  improvements"

* tag 'docs-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/docs/linux: (162 commits)
  Documentation: core-api: real-time: correct spelling
  doc: Add CPU Isolation documentation
  Documentation: Add managed interrupts
  Documentation: seq_file: drop 2.6 reference
  docs/zh_CN: update rust/index.rst translation
  docs/zh_CN: update rust/quick-start.rst translation
  docs/zh_CN: update rust/coding-guidelines.rst translation
  docs/zh_CN: update rust/arch-support.rst translation
  docs/zh_CN: sync process/2.Process.rst with English version
  docs/zh_CN: fix an inconsistent statement in dev-tools/testing-overview
  tracing: Documentation: Update histogram-design.rst for fn() handling
  docs: sysctl: Add documentation for /proc/sys/xen/
  Docs: hid: intel-ish-hid: make long URL usable
  Documentation/kernel-parameters: fix architecture alignment for pt, nopt, and nobypass
  sched/doc: Update yield_task description in sched-design-CFS
  Documentation/rtla: Convert links to RST format
  docs: fix typos and duplicated words across documentation
  docs: fix typo in zoran driver documentation
  docs: add an Assisted-by mention to submitting-patches.rst
  Revert "scripts/checkpatch: add Assisted-by: tag validation"
  ...
 2026-04-14 08:47:08 -07:00
Linus Torvalds
d7c8087a9c Power management updates for 7.1-rc1 
- Update qcom-hw DT bindings to include Eliza hardware (Abel Vesa)
 
  - Update cpufreq-dt-platdev blocklist (Faruque Ansari)
 
  - Minor updates to driver and dt-bindings for Tegra (Thierry Reding,
    Rosen Penev)
 
  - Add MAINTAINERS entry for CPPC driver (Viresh Kumar)
 
  - Add support for new features: CPPC performance priority, Dynamic EPP,
    Raw EPP, and new unit tests for them to amd-pstate (Gautham Shenoy,
    Mario Limonciello)
 
  - Fix sysfs files being present when HW missing and broken/outdated
    documentation in the amd-pstate driver (Ninad Naik, Gautham Shenoy)
 
  - Pass the policy to cpufreq_driver->adjust_perf() to avoid using
    cpufreq_cpu_get() in the .adjust_perf() callback in amd-pstate which
    leads to a scheduling-while-atomic bug (K Prateek Nayak)
 
  - Clean up dead code in Kconfig for cpufreq (Julian Braha)
 
  - Remove max_freq_req update for pre-existing cpufreq policy and add a
    boost_freq_req QoS request to save the boost constraint instead of
    overwriting the last scaling_max_freq constraint (Pierre Gondois)
 
  - Embed cpufreq QoS freq_req objects in cpufreq policy so they all
    are allocated in one go along with the policy to simplify lifetime
    rules and avoid error handling issues (Viresh Kumar)
 
  - Use DMI max speed when CPPC is unavailable in the acpi-cpufreq
    scaling driver (Henry Tseng)
 
  - Switch policy_is_shared() in cpufreq to using cpumask_nth() instead
    of cpumask_weight() because the former is more efficient (Yury Norov)
 
  - Use sysfs_emit() in sysfs show functions for cpufreq governor
    attributes (Thorsten Blum)
 
  - Update intel_pstate to stop returning an error when "off" is written
    to its status sysfs attribute while the driver is already off (Fabio
    De Francesco)
 
  - Include current frequency in the debug message printed by
    __cpufreq_driver_target() (Pengjie Zhang)
 
  - Refine stopped tick handling in the menu cpuidle governor and
    rearrange stopped tick handling in the teo cpuidle governor (Rafael
    Wysocki)
 
  - Add Panther Lake C-states table to the intel_idle driver (Artem
    Bityutskiy)
 
  - Clean up dead dependencies on CPU_IDLE in Kconfig (Julian Braha)
 
  - Simplify cpuidle_register_device() with guard() (Huisong Li)
 
  - Use performance level if available to distinguish between rates in
    OPP debugfs (Manivannan Sadhasivam)
 
  - Fix scoped_guard in dev_pm_opp_xlate_required_opp() (Viresh Kumar)
 
  - Return -ENODATA if the snapshot image is not loaded (Alberto Garcia)
 
  - Remove inclusion of crypto/hash.h from hibernate_64.c on x86 (Eric
    Biggers)
 
  - Clean up and rearrange the intel_rapl power capping driver to make
    the respective interface drivers (TPMI, MSR, and MMOI) hold their
    own settings and primitives and consolidate PL4 and PMU support
    flags into rapl_defaults (Kuppuswamy Sathyanarayanan)
 
  - Correct kernel-doc function parameter names in the power capping core
    code (Randy Dunlap)
 
  - Remove unneeded casting for HZ_PER_KHZ in devfreq (Andy Shevchenko)
 
  - Use _visible attribute to replace create/remove_sysfs_files() in
    devfreq (Pengjie Zhang)
 
  - Add Tegra114 support to activity monitor device in tegra30-devfreq as
    a preparation to upcoming EMC controller support (Svyatoslav Ryhel)
 
  - Fix mistakes in cpupower man pages, add the boost and epp options to
    the cpupower-frequency-info man page, and add the perf-bias option to
    the cpupower-info man page (Roberto Ricci)
 
  - Remove unnecessary extern declarations from getopt.h in arguments
    parsing functions in cpufreq-set, cpuidle-info, cpuidle-set,
    cpupower-info, and cpupower-set utilities (Kaushlendra Kumar)
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Merge tag 'pm-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "Once again, cpufreq is the most active development area, mostly
  because of the new feature additions and documentation updates in the
  amd-pstate driver, but there are also changes in the cpufreq core
  related to boost support and other assorted updates elsewhere.

  Next up are power capping changes due to the major cleanup of the
  Intel RAPL driver.

  On the cpuidle front, a new C-states table for Intel Panther Lake is
  added to the intel_idle driver, the stopped tick handling in the menu
  and teo governors is updated, and there are a couple of cleanups.

  Apart from the above, support for Tegra114 is added to devfreq and
  there are assorted cleanups of that code, there are also two updates
  of the operating performance points (OPP) library, two minor updates
  related to hibernation, and cpupower utility man pages updates and
  cleanups.

  Specifics:

   - Update qcom-hw DT bindings to include Eliza hardware (Abel Vesa)

   - Update cpufreq-dt-platdev blocklist (Faruque Ansari)

   - Minor updates to driver and dt-bindings for Tegra (Thierry Reding,
     Rosen Penev)

   - Add MAINTAINERS entry for CPPC driver (Viresh Kumar)

   - Add support for new features: CPPC performance priority, Dynamic
     EPP, Raw EPP, and new unit tests for them to amd-pstate (Gautham
     Shenoy, Mario Limonciello)

   - Fix sysfs files being present when HW missing and broken/outdated
     documentation in the amd-pstate driver (Ninad Naik, Gautham Shenoy)

   - Pass the policy to cpufreq_driver->adjust_perf() to avoid using
     cpufreq_cpu_get() in the .adjust_perf() callback in amd-pstate
     which leads to a scheduling-while-atomic bug (K Prateek Nayak)

   - Clean up dead code in Kconfig for cpufreq (Julian Braha)

   - Remove max_freq_req update for pre-existing cpufreq policy and add
     a boost_freq_req QoS request to save the boost constraint instead
     of overwriting the last scaling_max_freq constraint (Pierre
     Gondois)

   - Embed cpufreq QoS freq_req objects in cpufreq policy so they all
     are allocated in one go along with the policy to simplify lifetime
     rules and avoid error handling issues (Viresh Kumar)

   - Use DMI max speed when CPPC is unavailable in the acpi-cpufreq
     scaling driver (Henry Tseng)

   - Switch policy_is_shared() in cpufreq to using cpumask_nth() instead
     of cpumask_weight() because the former is more efficient (Yury
     Norov)

   - Use sysfs_emit() in sysfs show functions for cpufreq governor
     attributes (Thorsten Blum)

   - Update intel_pstate to stop returning an error when "off" is
     written to its status sysfs attribute while the driver is already
     off (Fabio De Francesco)

   - Include current frequency in the debug message printed by
     __cpufreq_driver_target() (Pengjie Zhang)

   - Refine stopped tick handling in the menu cpuidle governor and
     rearrange stopped tick handling in the teo cpuidle governor (Rafael
     Wysocki)

   - Add Panther Lake C-states table to the intel_idle driver (Artem
     Bityutskiy)

   - Clean up dead dependencies on CPU_IDLE in Kconfig (Julian Braha)

   - Simplify cpuidle_register_device() with guard() (Huisong Li)

   - Use performance level if available to distinguish between rates in
     OPP debugfs (Manivannan Sadhasivam)

   - Fix scoped_guard in dev_pm_opp_xlate_required_opp() (Viresh Kumar)

   - Return -ENODATA if the snapshot image is not loaded (Alberto
     Garcia)

   - Remove inclusion of crypto/hash.h from hibernate_64.c on x86 (Eric
     Biggers)

   - Clean up and rearrange the intel_rapl power capping driver to make
     the respective interface drivers (TPMI, MSR, and MMOI) hold their
     own settings and primitives and consolidate PL4 and PMU support
     flags into rapl_defaults (Kuppuswamy Sathyanarayanan)

   - Correct kernel-doc function parameter names in the power capping
     core code (Randy Dunlap)

   - Remove unneeded casting for HZ_PER_KHZ in devfreq (Andy Shevchenko)

   - Use _visible attribute to replace create/remove_sysfs_files() in
     devfreq (Pengjie Zhang)

   - Add Tegra114 support to activity monitor device in tegra30-devfreq
     as a preparation to upcoming EMC controller support (Svyatoslav
     Ryhel)

   - Fix mistakes in cpupower man pages, add the boost and epp options
     to the cpupower-frequency-info man page, and add the perf-bias
     option to the cpupower-info man page (Roberto Ricci)

   - Remove unnecessary extern declarations from getopt.h in arguments
     parsing functions in cpufreq-set, cpuidle-info, cpuidle-set,
     cpupower-info, and cpupower-set utilities (Kaushlendra Kumar)"

* tag 'pm-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (74 commits)
  cpufreq/amd-pstate: Add POWER_SUPPLY select for dynamic EPP
  cpupower: remove extern declarations in cmd functions
  cpuidle: Simplify cpuidle_register_device() with guard()
  PM / devfreq: tegra30-devfreq: add support for Tegra114
  PM / devfreq: use _visible attribute to replace create/remove_sysfs_files()
  PM / devfreq: Remove unneeded casting for HZ_PER_KHZ
  MAINTAINERS: amd-pstate: Step down as maintainer, add Prateek as reviewer
  cpufreq: Pass the policy to cpufreq_driver->adjust_perf()
  cpufreq/amd-pstate: Pass the policy to amd_pstate_update()
  cpufreq/amd-pstate-ut: Add a unit test for raw EPP
  cpufreq/amd-pstate: Add support for raw EPP writes
  cpufreq/amd-pstate: Add support for platform profile class
  cpufreq/amd-pstate: add kernel command line to override dynamic epp
  cpufreq/amd-pstate: Add dynamic energy performance preference
  Documentation: amd-pstate: fix dead links in the reference section
  cpufreq/amd-pstate: Cache the max frequency in cpudata
  Documentation/amd-pstate: Add documentation for amd_pstate_floor_{freq,count}
  Documentation/amd-pstate: List amd_pstate_prefcore_ranking sysfs file
  Documentation/amd-pstate: List amd_pstate_hw_prefcore sysfs file
  amd-pstate-ut: Add a testcase to validate the visibility of driver attributes
  ...
 2026-04-13 19:47:52 -07:00
Linus Torvalds
2e31b16101 ACPI support updates for 7.1-rc1 
- Update maintainers information regarding ACPICA (Rafael Wysocki)
 
  - Replace strncpy() with strscpy_pad() in acpi_ut_safe_strncpy() (Kees
    Cook)
 
  - Trigger an ordered system power off after encountering a fatal error
    operator in AML (Armin Wolf)
 
  - Enable ACPI FPDT parsing on LoongArch (Xi Ruoyao)
 
  - Remove the temporary stop-gap acpi_pptt_cache_v1_full structure from
    the ACPI PPTT parser (Ben Horgan)
 
  - Add support for exposing ACPI FPDT subtables FBPT and S3PT (Nate
    DeSimone)
 
  - Address multiple assorted issues and clean up the code in the ACPI
    processor idle driver (Huisong Li)
 
  - Replace strlcat() in the ACPI processor idle drive with a better
    alternative (Andy Shevchenko)
 
  - Rearrange and clean up acpi_processor_errata_piix4() (Rafael Wysocki)
 
  - Move reference performance to capabilities and fix an uninitialized
    variable in the ACPI CPPC library (Pengjie Zhang)
 
  - Add support for the Performance Limited Register to the ACPI CPPC
    library (Sumit Gupta)
 
  - Add cppc_get_perf() API to read performance controls, extend
    cppc_set_epp_perf() for FFH/SystemMemory, and make the ACPI CPPC
    library warn on missing mandatory DESIRED_PERF register (Sumit Gupta)
 
  - Modify the cpufreq CPPC driver to update MIN_PERF/MAX_PERF in target
    callbacks to allow it to control performance bounds via standard
    scaling_min_freq and scaling_max_freq sysfs attributes and add sysfs
    documentation for the Performance Limited Register to it (Sumit Gupta)
 
  - Add ACPI support to the platform device interface in the CMOS RTC
    driver, make the ACPI core device enumeration code create a platform
    device for the CMOS RTC, and drop CMOS RTC PNP device support (Rafael
    Wysocki)
 
  - Consolidate the x86-specific CMOS RTC handling with the ACPI TAD
    driver and clean up the CMOS RTC ACPI address space handler (Rafael
    Wysocki)
 
  - Enable ACPI alarm in the CMOS RTC driver if advertised in ACPI FADT
    and allow that driver to work without a dedicated IRQ if the ACPI
    alarm is used (Rafael Wysocki)
 
  - Clean up the ACPI TAD driver in various ways and add an RTC class
    device interface, including both the RTC setting/reading and alarm
    timer support, to it (Rafael Wysocki)
 
  - Clean up the ACPI AC and ACPI PAD (processor aggregator device)
    drivers (Rafael Wysocki)
 
  - Rework checking for duplicate video bus devices and consolidate
    pnp.bus_id workarounds handling in the ACPI video bus driver (Rafael
    Wysocki)
 
  - Update the ACPI core device drivers to stop setting acpi_device_name()
    unnecessarily (Rafael Wysocki)
 
  - Rearrange code using acpi_device_class() in the ACPI core device
    drivers and update them to stop setting acpi_device_class()
    unnecessarily (Rafael Wysocki)
 
  - Define ACPI_AC_CLASS in one place (Rafael Wysocki)
 
  - Convert the ni903x_wdt watchdog driver and the xen ACPI PAD driver to
    bind to platform devices instead of ACPI devices (Rafael Wysocki)
 
  - Add devm_ghes_register_vendor_record_notifier(), use it in the PCI
    hisi driver, and Add NVIDIA vendor CPER record handler (Kai-Heng
    Feng)
 
  - Consolidate the interface for obtaining a CPU UID from ACPI across
    architectures and use it to address incorrect PCI TPH Steering Tag
    on ARM64 resulting from the invalid assumption that the ACPI
    Processor UID would always be the same as the corresponding logical
    CPU ID in Linux (Chengwen Feng)
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Merge tag 'acpi-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI support updates from Rafael Wysocki:
 "These include an update of the CMOS RTC driver and the related ACPI
  and x86 code that, among other things, switches it over to using the
  platform device interface for device binding on x86 instead of the PNP
  device driver interface (which allows the code in question to be
  simplified quite a bit), a major update of the ACPI Time and Alarm
  Device (TAD) driver adding an RTC class device interface to it, and
  updates of core ACPI drivers that remove some unnecessary and not
  really useful code from them.

  Apart from that, two drivers are converted to using the platform
  driver interface for device binding instead of the ACPI driver one,
  which is slated for removal, support for the Performance Limited
  register is added to the ACPI CPPC library and there are some
  janitorial updates of it and the related cpufreq CPPC driver, the ACPI
  processor driver is fixed and cleaned up, and NVIDIA vendor CPER
  record handler is added to the APEI GHES code.

  Also, the interface for obtaining a CPU UID from ACPI is consolidated
  across architectures and used for fixing a problem with the PCI TPH
  Steering Tag on ARM64, there are two updates related to ACPICA, a
  minor ACPI OS Services Layer (OSL) update, and a few assorted updates
  related to ACPI tables parsing.

  Specifics:

   - Update maintainers information regarding ACPICA (Rafael Wysocki)

   - Replace strncpy() with strscpy_pad() in acpi_ut_safe_strncpy()
     (Kees Cook)

   - Trigger an ordered system power off after encountering a fatal
     error operator in AML (Armin Wolf)

   - Enable ACPI FPDT parsing on LoongArch (Xi Ruoyao)

   - Remove the temporary stop-gap acpi_pptt_cache_v1_full structure
     from the ACPI PPTT parser (Ben Horgan)

   - Add support for exposing ACPI FPDT subtables FBPT and S3PT (Nate
     DeSimone)

   - Address multiple assorted issues and clean up the code in the ACPI
     processor idle driver (Huisong Li)

   - Replace strlcat() in the ACPI processor idle drive with a better
     alternative (Andy Shevchenko)

   - Rearrange and clean up acpi_processor_errata_piix4() (Rafael
     Wysocki)

   - Move reference performance to capabilities and fix an uninitialized
     variable in the ACPI CPPC library (Pengjie Zhang)

   - Add support for the Performance Limited Register to the ACPI CPPC
     library (Sumit Gupta)

   - Add cppc_get_perf() API to read performance controls, extend
     cppc_set_epp_perf() for FFH/SystemMemory, and make the ACPI CPPC
     library warn on missing mandatory DESIRED_PERF register (Sumit
     Gupta)

   - Modify the cpufreq CPPC driver to update MIN_PERF/MAX_PERF in
     target callbacks to allow it to control performance bounds via
     standard scaling_min_freq and scaling_max_freq sysfs attributes and
     add sysfs documentation for the Performance Limited Register to it
     (Sumit Gupta)

   - Add ACPI support to the platform device interface in the CMOS RTC
     driver, make the ACPI core device enumeration code create a
     platform device for the CMOS RTC, and drop CMOS RTC PNP device
     support (Rafael Wysocki)

   - Consolidate the x86-specific CMOS RTC handling with the ACPI TAD
     driver and clean up the CMOS RTC ACPI address space handler (Rafael
     Wysocki)

   - Enable ACPI alarm in the CMOS RTC driver if advertised in ACPI FADT
     and allow that driver to work without a dedicated IRQ if the ACPI
     alarm is used (Rafael Wysocki)

   - Clean up the ACPI TAD driver in various ways and add an RTC class
     device interface, including both the RTC setting/reading and alarm
     timer support, to it (Rafael Wysocki)

   - Clean up the ACPI AC and ACPI PAD (processor aggregator device)
     drivers (Rafael Wysocki)

   - Rework checking for duplicate video bus devices and consolidate
     pnp.bus_id workarounds handling in the ACPI video bus driver
     (Rafael Wysocki)

   - Update the ACPI core device drivers to stop setting
     acpi_device_name() unnecessarily (Rafael Wysocki)

   - Rearrange code using acpi_device_class() in the ACPI core device
     drivers and update them to stop setting acpi_device_class()
     unnecessarily (Rafael Wysocki)

   - Define ACPI_AC_CLASS in one place (Rafael Wysocki)

   - Convert the ni903x_wdt watchdog driver and the xen ACPI PAD driver
     to bind to platform devices instead of ACPI devices (Rafael
     Wysocki)

   - Add devm_ghes_register_vendor_record_notifier(), use it in the PCI
     hisi driver, and Add NVIDIA vendor CPER record handler (Kai-Heng
     Feng)

   - Consolidate the interface for obtaining a CPU UID from ACPI across
     architectures and use it to address incorrect PCI TPH Steering Tag
     on ARM64 resulting from the invalid assumption that the ACPI
     Processor UID would always be the same as the corresponding logical
     CPU ID in Linux (Chengwen Feng)"

* tag 'acpi-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (73 commits)
  ACPICA: Update maintainers information
  watchdog: ni903x_wdt: Convert to a platform driver
  ACPI: PAD: xen: Convert to a platform driver
  ACPI: processor: idle: Reset cpuidle on C-state list changes
  cpuidle: Extract and export no-lock variants of cpuidle_unregister_device()
  PCI/TPH: Pass ACPI Processor UID to Cache Locality _DSM
  ACPI: PPTT: Use acpi_get_cpu_uid() and remove get_acpi_id_for_cpu()
  perf: arm_cspmu: Switch to acpi_get_cpu_uid() from get_acpi_id_for_cpu()
  ACPI: Centralize acpi_get_cpu_uid() declaration in include/linux/acpi.h
  x86/acpi: Add acpi_get_cpu_uid() for unified ACPI CPU UID retrieval
  RISC-V: ACPI: Add acpi_get_cpu_uid() for unified ACPI CPU UID retrieval
  LoongArch: Add acpi_get_cpu_uid() for unified ACPI CPU UID retrieval
  arm64: acpi: Add acpi_get_cpu_uid() for unified ACPI CPU UID retrieval
  ACPI: APEI: GHES: Add NVIDIA vendor CPER record handler
  PCI: hisi: Use devm_ghes_register_vendor_record_notifier()
  ACPI: APEI: GHES: Add devm_ghes_register_vendor_record_notifier()
  ACPI: tables: Enable FPDT on LoongArch
  ACPI: processor: idle: Fix NULL pointer dereference in hotplug path
  ACPI: processor: idle: Reset power_setup_done flag on initialization failure
  ACPI: TAD: Add alarm support to the RTC class device interface
  ...
 2026-04-13 19:25:07 -07:00
Linus Torvalds
0b0128e64a xfs: new code for Linux 7.1 
Signed-off-by: Carlos Maiolino <cem@kernel.org>
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Merge tag 'xfs-merge-7.1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs updates from Carlos Maiolino:
 "There aren't any new features.

  The whole series is just a collection of bug fixes and code
  refactoring. There is some new information added a couple new
  tracepoints, new data added to mountstats, but no big changes"

* tag 'xfs-merge-7.1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (41 commits)
  xfs: fix number of GC bvecs
  xfs: untangle the open zones reporting in mountinfo
  xfs: expose the number of open zones in sysfs
  xfs: reduce special casing for the open GC zone
  xfs: streamline GC zone selection
  xfs: refactor GC zone selection helpers
  xfs: rename xfs_zone_gc_iter_next to xfs_zone_gc_iter_irec
  xfs: put the open zone later xfs_open_zone_put
  xfs: add a separate tracepoint for stealing an open zone for GC
  xfs: delay initial open of the GC zone
  xfs: fix a resource leak in xfs_alloc_buftarg()
  xfs: handle too many open zones when mounting
  xfs: refactor xfs_mount_zones
  xfs: fix integer overflow in busy extent sort comparator
  xfs: fix integer overflow in deferred intent sort comparators
  xfs: fold xfs_setattr_size into xfs_vn_setattr_size
  xfs: remove a duplicate assert in xfs_setattr_size
  xfs: return default quota limits for IDs without a dquot
  xfs: start gc on zonegc_low_space attribute updates
  xfs: don't decrement the buffer LRU count for in-use buffers
  ...
 2026-04-13 17:03:48 -07:00
Linus Torvalds
7fe6ac157b for-7.1/block-20260411 
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Merge tag 'for-7.1/block-20260411' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux

Pull block updates from Jens Axboe:

 - Add shared memory zero-copy I/O support for ublk, bypassing per-I/O
   copies between kernel and userspace by matching registered buffer
   PFNs at I/O time. Includes selftests.

 - Refactor bio integrity to support filesystem initiated integrity
   operations and arbitrary buffer alignment.

 - Clean up bio allocation, splitting bio_alloc_bioset() into clear fast
   and slow paths. Add bio_await() and bio_submit_or_kill() helpers,
   unify synchronous bi_end_io callbacks.

 - Fix zone write plug refcount handling and plug removal races. Add
   support for serializing zone writes at QD=1 for rotational zoned
   devices, yielding significant throughput improvements.

 - Add SED-OPAL ioctls for Single User Mode management and a STACK_RESET
   command.

 - Add io_uring passthrough (uring_cmd) support to the BSG layer.

 - Replace pp_buf in partition scanning with struct seq_buf.

 - zloop improvements and cleanups.

 - drbd genl cleanup, switching to pre_doit/post_doit.

 - NVMe pull request via Keith:
      - Fabrics authentication updates
      - Enhanced block queue limits support
      - Workqueue usage updates
      - A new write zeroes device quirk
      - Tagset cleanup fix for loop device

 - MD pull requests via Yu Kuai:
      - Fix raid5 soft lockup in retry_aligned_read()
      - Fix raid10 deadlock with check operation and nowait requests
      - Fix raid1 overlapping writes on writemostly disks
      - Fix sysfs deadlock on array_state=clear
      - Proactive RAID-5 parity building with llbitmap, with
        write_zeroes_unmap optimization for initial sync
      - Fix llbitmap barrier ordering, rdev skipping, and bitmap_ops
        version mismatch fallback
      - Fix bcache use-after-free and uninitialized closure
      - Validate raid5 journal metadata payload size
      - Various cleanups

 - Various other fixes, improvements, and cleanups

* tag 'for-7.1/block-20260411' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux: (146 commits)
  ublk: fix tautological comparison warning in ublk_ctrl_reg_buf
  scsi: bsg: fix buffer overflow in scsi_bsg_uring_cmd()
  block: refactor blkdev_zone_mgmt_ioctl
  MAINTAINERS: update ublk driver maintainer email
  Documentation: ublk: address review comments for SHMEM_ZC docs
  ublk: allow buffer registration before device is started
  ublk: replace xarray with IDA for shmem buffer index allocation
  ublk: simplify PFN range loop in __ublk_ctrl_reg_buf
  ublk: verify all pages in multi-page bvec fall within registered range
  ublk: widen ublk_shmem_buf_reg.len to __u64 for 4GB buffer support
  xfs: use bio_await in xfs_zone_gc_reset_sync
  block: add a bio_submit_or_kill helper
  block: factor out a bio_await helper
  block: unify the synchronous bi_end_io callbacks
  xfs: fix number of GC bvecs
  selftests/ublk: add read-only buffer registration test
  selftests/ublk: add filesystem fio verify test for shmem_zc
  selftests/ublk: add hugetlbfs shmem_zc test for loop target
  selftests/ublk: add shared memory zero-copy test
  selftests/ublk: add UBLK_F_SHMEM_ZC support for loop target
  ...
 2026-04-13 15:51:31 -07:00
Frederic Weisbecker
f0efd29aa6 doc: Add CPU Isolation documentation 
nohz_full was introduced in v3.10 in 2013, which means this
documentation is overdue for 13 years.

Fortunately Paul wrote a part of the needed documentation a while ago,
especially concerning nohz_full in Documentation/timers/no_hz.rst and
also about per-CPU kthreads in
Documentation/admin-guide/kernel-per-CPU-kthreads.rst

Introduce a new page that gives an overview of CPU isolation in general.

Acked-by: Waiman Long <longman@redhat.com>
Reviewed-by: Valentin Schneider <vschneid@redhat.com>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Reviewed-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260402094749.18879-1-frederic@kernel.org>
 2026-04-12 13:08:28 -06:00
Rafael J. Wysocki
8e2308c1ae Merge branches 'acpica', 'acpi-osl' and 'acpi-tables' 
Merge ACPICA updates, an ACPI OS service layer (OSL) update and
assorted updates related to parsing ACPI tables for 7.1-rc1:

 - Update maintainers information regarding ACPICA (Rafael Wysocki)

 - Replace strncpy() with strscpy_pad() in acpi_ut_safe_strncpy() (Kees
   Cook)

 - Trigger an ordered system power off after encountering a fatal error
   operator in AML (Armin Wolf)

 - Enable ACPI FPDT parsing on LoongArch (Xi Ruoyao)

 - Remove the temporary stop-gap acpi_pptt_cache_v1_full structure from
   the ACPI PPTT parser (Ben Horgan)

 - Add support for exposing ACPI FPDT subtables FBPT and S3PT (Nate
   DeSimone)

* acpica:
  ACPICA: Update maintainers information
  ACPICA: Replace strncpy() with strscpy_pad() in acpi_ut_safe_strncpy()

* acpi-osl:
  ACPI: OSL: Poweroff when encountering a fatal ACPI error

* acpi-tables:
  ACPI: tables: Enable FPDT on LoongArch
  Documentation: ABI: add FBPT and S3PT entries to sysfs-firmware-acpi
  ACPI: FPDT: expose FBPT and S3PT subtables via sysfs
  ACPI: PPTT: Remove duplicate structure, acpi_pptt_cache_v1_full
 2026-04-09 21:19:34 +02:00
Shubham Chakraborty
136799e52c docs: sysctl: Add documentation for /proc/sys/xen/ 
Add documentation for the Xen hypervisor sysctl controls in
/proc/sys/xen/balloon/.

Documents the hotplug_unpopulated tunable (available when
CONFIG_XEN_BALLOON_MEMORY_HOTPLUG is enabled) which controls
whether unpopulated memory regions are automatically hotplugged
when the Xen balloon driver needs to reclaim memory.

The documentation is based on source code analysis of
drivers/xen/balloon.c.

Signed-off-by: Shubham Chakraborty <chakrabortyshubham66@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260304150419.16738-1-chakrabortyshubham66@gmail.com>
 2026-04-09 08:44:31 -06:00
Li RongQing
15d49089e5 Documentation/kernel-parameters: fix architecture alignment for pt, nopt, and nobypass 
Commit ab0e7f2076 ("Documentation: Merge x86-specific boot options doc
into kernel-parameters.txt") introduced a formatting regression where
architecture tags were placed on separate lines with broken indentation.
This caused the 'nopt' [X86] parameter to appear as if it belonged to
the [PPC/POWERNV] section.

Furthermore, since the main 'iommu=' parameter heading already specifies
it is for [X86, EARLY], the subsequent standalone [X86] tags for 'pt',
'nopt', and the AMD GART options are redundant and clutter the
documentation.

Clean up the formatting by removing these redundant tags and properly
attributing the 'nobypass' option to [PPC/POWERNV].

Fixes: ab0e7f2076 ("Documentation: Merge x86-specific boot options doc into kernel-parameters.txt")
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260330105957.2271-1-lirongqing@baidu.com>
 2026-04-09 08:36:52 -06:00
Manuel Cortez
96c1f4517e docs: fix typos and duplicated words across documentation 
Fix the following typos and duplicated words:

- admin-guide/pm/intel-speed-select.rst: "weather" -> "whether"
- core-api/real-time/differences.rst: "the the" -> "the"
- admin-guide/bcache.rst: "to to" -> "to"

Signed-off-by: Manuel Cortez <mdjesuscv@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260406030323.1196-1-mdjesuscv@gmail.com>
 2026-04-09 08:21:32 -06:00
Peter Zijlstra
abb12b9b52 x86/topology: Add paramter to split LLC 
Add a (debug) option to virtually split the LLC, no CAT involved, just fake
topology. Used to test code that depends (either in behaviour or directly) on
there being multiple LLC domains in a node.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
 2026-04-09 15:49:46 +02:00
Christoph Hellwig
62c89988dc xfs: expose the number of open zones in sysfs 
Add a sysfs attribute for the current number of open zones so that it
can be trivially read from userspace in monitoring or testing software.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hans Holmberg <hans.holmberg@wdc.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
 2026-04-07 13:28:47 +02:00
Liew Rui Yan
6f1e182387 Docs/mm/damon: document min_nr_regions constraint and rationale 
The current DAMON implementation requires 'min_nr_regions' to be at least
3.  However, this constraint is not explicitly documented in the
admin-guide documents, nor is its design rationale explained in the design
document.

Add a section in design.rst to explain the rationale: the virtual address
space monitoring design needs to handle at least three regions to
accommodate two large unmapped areas.  While this is specific to 'vaddr',
DAMON currently enforces it across all operation sets for consistency.

Also update reclaim.rst and lru_sort.rst by adding cross-references to
this constraint within their respective 'min_nr_regions' parameter
description sections, ensuring users are aware of the lower bound.

This change is motivated from a recent discussion [1].

Link: https://lkml.kernel.org/r/20260320052428.213230-1-aethernet65535@gmail.com
Link: https://lore.kernel.org/damon/20260319151528.86490-1-sj@kernel.org/T/#t [1]
Signed-off-by: Liew Rui Yan <aethernet65535@gmail.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-04-05 13:53:34 -07:00
Liew Rui Yan
4bdbddb4e4 Docs/mm/damon: document exclusivity of special-purpose modules 
Add a section in design.rst to explain that DAMON special-purpose kernel
modules (LRU_SORT, RECLAIM, STAT) run in an exclusive manner and return
-EBUSY if another is already running.

Update lru_sort.rst, reclaim.rst and stat.rst by adding cross-references
to this exclusivity rule at the end of their respective Example sections.

This change is motivated from another discussion [1].

Link: https://lkml.kernel.org/r/20260315162945.80994-1-sj@kernel.org
Link: https://lore.kernel.org/damon/20260314002119.79742-1-sj@kernel.org/T/#t [1]
Signed-off-by: Liew Rui Yan <aethernet65535@gmail.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-04-05 13:53:30 -07:00
SeongJae Park
d9cfe515d3 Docs/admin-guide/mm/damon/usage: document goal_tuner sysfs file 
Update the DAMON usage document for the new sysfs file for the goal based
quota auto-tuning algorithm selection.

Link: https://lkml.kernel.org/r/20260310010529.91162-7-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-04-05 13:53:26 -07:00
Sergey Senozhatsky
cedfa028b5 zram: remove chained recompression 
Chained recompression has unpredictable behavior and is not useful in
practice.

First, systems usually configure just one alternative recompression
algorithm, which has slower compression/decompression but better
compression ratio.  A single alternative algorithm doesn't need chaining.

Second, even with multiple recompression algorithms, chained recompression
is suboptimal.  If a lower priority algorithm succeeds, the page is never
attempted with a higher priority algorithm, leading to worse memory
savings.  If a lower priority algorithm fails, the page is still attempted
with a higher priority algorithm, wasting resources on the failed lower
priority attempt.

In either case, the system would be better off targeting a specific
priority directly.

Chained recompression also significantly complicates the code.  Remove it.

Link: https://lkml.kernel.org/r/20260311084312.1766036-6-senozhatsky@chromium.org
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Brian Geffon <bgeffon@google.com>
Cc: gao xu <gaoxu2@honor.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-04-05 13:53:24 -07:00
Sergey Senozhatsky
be5f13d948 zram: update recompression documentation 
Emphasize usage of the `priority` parameter for recompression and explain
why `algo` parameter can lead to unexpected behavior and thus is not
recommended.

Link: https://lkml.kernel.org/r/20260311084312.1766036-5-senozhatsky@chromium.org
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Brian Geffon <bgeffon@google.com>
Cc: gao xu <gaoxu2@honor.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-04-05 13:53:24 -07:00
Akinobu Mita
1eba4c9599 docs: mm: fix typo in numa_memory_policy.rst 
Fix a typo: MPOL_INTERLEAVED -> MPOL_INTERLEAVE.

Link: https://lkml.kernel.org/r/20260310151837.5888-1-akinobu.mita@gmail.com
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-04-05 13:53:23 -07:00
SeongJae Park
d7f00084f6 Docs/admin-guide/mm/damn/lru_sort: fix intervals autotune parameter name 
The section name should be the same as the parameter name.  Fix it.

Link: https://lkml.kernel.org/r/20260307195356.203753-6-sj@kernel.org
Fixes: ed581147a4 ("Docs/admin-guide/mm/damon/lru_sort: document intervals autotuning")
Signed-off-by: SeongJae Park <sj@kernel.org>
Acked-by: wang lian <lianux.mm@gmail.com>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <davidgow@google.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-04-05 13:53:22 -07:00
Kiryl Shutsemau
d50569612c mm: rename the 'compound_head' field in the 'struct page' to 'compound_info' 
The 'compound_head' field in the 'struct page' encodes whether the page is
a tail and where to locate the head page.  Bit 0 is set if the page is a
tail, and the remaining bits in the field point to the head page.

As preparation for changing how the field encodes information about the
head page, rename the field to 'compound_info'.

Link: https://lkml.kernel.org/r/20260227194302.274384-4-kas@kernel.org
Signed-off-by: Kiryl Shutsemau <kas@kernel.org>
Reviewed-by: Muchun Song <muchun.song@linux.dev>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Acked-by: David Hildenbrand (arm) <david@kernel.org>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Baoquan He <bhe@redhat.com>
Cc: Christoph Lameter <cl@gentwo.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Frank van der Linden <fvdl@google.com>
Cc: Harry Yoo <harry.yoo@oracle.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Usama Arif <usamaarif642@gmail.com>
Cc: WANG Xuerui <kernel@xen0n.name>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-04-05 13:53:08 -07:00
Marco Elver
da735962d0 kfence: add kfence.fault parameter 
Add kfence.fault parameter to control the behavior when a KFENCE error is
detected (similar in spirit to kasan.fault=<mode>).

The supported modes for kfence.fault=<mode> are:

  - report: print the error report and continue (default).
  - oops: print the error report and oops.
  - panic: print the error report and panic.

In particular, the 'oops' mode offers a trade-off between no mitigation
on report and panicking outright (if panic_on_oops is not set).

Link: https://lkml.kernel.org/r/20260225203639.3159463-1-elver@google.com
Signed-off-by: Marco Elver <elver@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kees Cook <kees@kernel.org>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-04-05 13:53:06 -07:00
Jason Miu
6b0dd42d76 kho: remove finalize state and clients 
Eliminate the `kho_finalize()` function and its associated state from the
KHO subsystem.  The transition to a radix tree for memory tracking makes
the explicit "finalize" state and its serialization step obsolete.

Remove the `kho_finalize()` and `kho_finalized()` APIs and their stub
implementations.  Update KHO client code and the debugfs interface to no
longer call or depend on the `kho_finalize()` mechanism.

Complete the move towards a stateless KHO, simplifying the overall design
by removing unnecessary state management.

Link: https://lkml.kernel.org/r/20260206021428.3386442-3-jasonmiu@google.com
Signed-off-by: Jason Miu <jasonmiu@google.com>
Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Alexander Graf <graf@amazon.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Changyuan Lyu <changyuanl@google.com>
Cc: David Matlack <dmatlack@google.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Pratyush Yadav <pratyush@kernel.org>
Cc: Ran Xiaokai <ran.xiaokai@zte.com.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-04-05 13:53:04 -07:00
Jiayuan Chen
5ad41a38c3 mm: zswap: add per-memcg stat for incompressible pages 
Patch series "mm: zswap: add per-memcg stat for incompressible pages", v3.

In containerized environments, knowing which cgroup is contributing
incompressible pages to zswap is essential for effective resource
management.  This series adds a new per-memcg stat 'zswap_incomp' to track
incompressible pages, along with a selftest.


This patch (of 2):

The global zswap_stored_incompressible_pages counter was added in commit
dca4437a58 ("mm/zswap: store <PAGE_SIZE compression failed page as-is")
to track how many pages are stored in raw (uncompressed) form in zswap. 
However, in containerized environments, knowing which cgroup is
contributing incompressible pages is essential for effective resource
management [1].

Add a new memcg stat 'zswap_incomp' to track incompressible pages per
cgroup.  This helps administrators and orchestrators to:

1. Identify workloads that produce incompressible data (e.g., encrypted
   data, already-compressed media, random data) and may not benefit from
   zswap.

2. Make informed decisions about workload placement - moving
   incompressible workloads to nodes with larger swap backing devices
   rather than relying on zswap.

3. Debug zswap efficiency issues at the cgroup level without needing to
   correlate global stats with individual cgroups.

While the compression ratio can be estimated from existing stats (zswap /
zswapped * PAGE_SIZE), this doesn't distinguish between "uniformly poor
compression" and "a few completely incompressible pages mixed with highly
compressible ones".  The zswap_incomp stat provides direct visibility into
the latter case.

Link: https://lkml.kernel.org/r/20260213071827.5688-1-jiayuan.chen@linux.dev
Link: https://lkml.kernel.org/r/20260213071827.5688-2-jiayuan.chen@linux.dev
Link: https://lore.kernel.org/linux-mm/CAF8kJuONDFj4NAksaR4j_WyDbNwNGYLmTe-o76rqU17La=nkOw@mail.gmail.com/ [1]
Signed-off-by: Jiayuan Chen <jiayuan.chen@shopee.com>
Acked-by: Nhat Pham <nphamcs@gmail.com>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Reviewed-by: Yosry Ahmed <yosry.ahmed@linux.dev>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Michal Koutný <mkoutny@suse.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-04-05 13:53:00 -07:00
Randy Dunlap
d644a698de NFSD: Docs: clean up pnfs server timeout docs 
Make various changes to the documentation formatting to avoid docs
build errors and otherwise improve the produced output format:

- use bullets for lists
- don't use a '.' at the end of echo commands
- fix indentation

Documentation/admin-guide/nfs/pnfs-block-server.rst:55: ERROR: Unexpected indentation. [docutils]
Documentation/admin-guide/nfs/pnfs-scsi-server.rst:37: ERROR: Unexpected indentation. [docutils]

Fixes: 6a97f70b45e7 ("NFSD: Enforce timeout on layout recall and integrate lease manager fencing")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
 2026-04-03 09:29:32 -04:00
Mario Limonciello (AMD)
6927f21852 cpufreq/amd-pstate: Add support for raw EPP writes 
The energy performance preference field of the CPPC request MSR
supports values from 0 to 255, but the strings only offer 4 values.

The other values are useful for tuning the performance of some
workloads.

Add support for writing the raw energy performance preference value
to the sysfs file.  If the last value written was an integer then
an integer will be returned.  If the last value written was a string
then a string will be returned.

Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
 2026-04-02 11:29:25 -05:00
Mario Limonciello (AMD)
798c47593c cpufreq/amd-pstate: Add support for platform profile class 
The platform profile core allows multiple drivers and devices to
register platform profile support.

When the legacy platform profile interface is used all drivers will
adjust the platform profile as well.

Add support for registering every CPU with the platform profile handler
when dynamic EPP is enabled.

The end result will be that changing the platform profile will modify
EPP accordingly.

Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
 2026-04-02 11:29:15 -05:00
Mario Limonciello (AMD)
da8afb1c66 cpufreq/amd-pstate: add kernel command line to override dynamic epp 
Add `amd_dynamic_epp=enable` and `amd_dynamic_epp=disable` to override
the kernel configuration option `CONFIG_X86_AMD_PSTATE_DYNAMIC_EPP`
locally.

Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
 2026-04-02 11:29:11 -05:00
Mario Limonciello (AMD)
e30ca6dd53 cpufreq/amd-pstate: Add dynamic energy performance preference 
Dynamic energy performance preference changes the EPP profile based on
whether the machine is running on AC or DC power.

A notification chain from the power supply core is used to adjust EPP
values on plug in or plug out events.

When enabled, the driver exposes a sysfs toggle for dynamic EPP, blocks
manual writes to energy_performance_preference while it "owns" the EPP
updates.

For non-server systems:
    * the default EPP for AC mode is `performance`.
    * the default EPP for DC mode is `balance_performance`.

For server systems dynamic EPP is mostly a no-op.

Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
 2026-04-02 11:29:02 -05:00
Ninad Naik
a362ae6e7e Documentation: amd-pstate: fix dead links in the reference section 
The links for AMD64 Architecture Programmer's Manual and PPR for AMD
Family 19h Model 51h, Revision A1 Processors redirect to a generic page.
Update the links to the working ones.

Signed-off-by: Ninad Naik <ninadnaik07@gmail.com>
Link: https://lore.kernel.org/r/20260330190855.1115304-1-ninadnaik07@gmail.com
Acked-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
 2026-04-02 11:28:58 -05:00
Gautham R. Shenoy
88d2ca6a68 Documentation/amd-pstate: Add documentation for amd_pstate_floor_{freq,count} 
Add documentation for the sysfs files
/sys/devices/system/cpu/cpufreq/policy*/amd_pstate_floor_freq
and
/sys/devices/system/cpu/cpufreq/policy*/amd_pstate_floor_count.

Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
 2026-04-02 11:28:51 -05:00
Gautham R. Shenoy
a5bc4c44ae Documentation/amd-pstate: List amd_pstate_prefcore_ranking sysfs file 
Add the missing amd_pstate_prefcore_ranking filenames in the sysfs
listing example leading to the descriptions of these
parameters. Clarify when will the file be visible.

Fixes: 15a2b764ea ("amd-pstate: Add missing documentation for `amd_pstate_prefcore_ranking`")
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
 2026-04-02 11:28:48 -05:00
Gautham R. Shenoy
7e1cf24efb Documentation/amd-pstate: List amd_pstate_hw_prefcore sysfs file 
Add the missing amd_pstate_hw_prefcore filenames in the sysfs listing
example leading to the descriptions of these parameters. Clarify when
will the file be visible.

Fixes: b96b82d1af ("cpufreq: amd-pstate: Add documentation for `amd_pstate_hw_prefcore`")
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
 2026-04-02 11:28:44 -05:00
Breno Leitao
41e3ccca00 docs: workqueue: document WQ_AFFN_CACHE_SHARD affinity scope 
Update kernel-parameters.txt and workqueue.rst to reflect the new
cache_shard affinity scope and the default change from cache to
cache_shard.

Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2026-04-01 10:24:18 -10:00
Damien Le Moal
b2a78fec34 zloop: add max_open_zones option 
Introduce the new max_open_zones option to allow specifying a limit on
the maximum number of open zones of a zloop device. This change allows
creating a zloop device that can more closely mimick the characteristics
of a physical SMR drive.

When set to a non zero value, only up to max_open_zones zones can be in
the implicit open (BLK_ZONE_COND_IMP_OPEN) and explicit open
(BLK_ZONE_COND_EXP_OPEN) conditions at any time. The transition to the
implicit open condition of a zone on a write operation can result in an
implicit close of an already implicitly open zone. This is handled in
the function zloop_do_open_zone(). This function also handles
transitions to the explicit open condition. Implicit close transitions
are handled using an LRU ordered list of open zones which is managed
using the helper functions zloop_lru_rotate_open_zone() and
zloop_lru_remove_open_zone().

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260326203245.946830-1-dlemoal@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
 2026-03-31 08:33:28 -06:00
Werner Sembach
9ec6bf62cf
Documentation: laptops: Update documentation for uniwill laptops 
Adds short description for two new sysfs entries, ctgp_offset and
usb_c_power_priority, to the documentation of uniwill laptops.

Reviewed-by: Armin Wolf <W_Armin@gmx.de>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Werner Sembach <wse@tuxedocomputers.com>
Link: https://patch.msgid.link/20260324203413.454361-6-wse@tuxedocomputers.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
 2026-03-31 17:27:32 +03:00
Ilpo Järvinen
a67a469cec platform-drivers-x86 for v7.0-3 
Fixes and New HW Support
 
 - amd/hsmp: Fix typo in error message
 
 - asus-armoury: Add support for G614FP, GA503QM, GZ302EAC, and GZ302EAC
 
 - asus-nb-wmi: Add DMI quirk for ASUS ROG Flow Z13-KJP GZ302EAC
 
 - hp-wmi: Support for Omen 16-k0xxx, 16-wf1xxx, 16-xf0xxx
 
 - intel-hid: Disable wakeup_mode during hibernation
 
 - ISST:
   - Check HWP support before MSR access
   - Correct locked bit width
 
 - lenovo: wmi-gamezone: Drop unused gz_chain_head
 
 - olpc-xo175-ec: Fix overflow error message
 
 The following is an automated shortlog grouped by driver:
 
 amd/hsmp:
  -  Fix typo in error message
 
 asus-armoury:
  -  add support for G614FP
  -  add support for GA503QM
  -  add support for GZ302EA and GZ302EAC
 
 asus-nb-wmi:
  -  add DMI quirk for ASUS ROG Flow Z13-KJP GZ302EAC
 
 hp-wmi:
  -  Add Omen 16-xf0xxx (8BCA) support
  -  Add support for Omen 16-k0xxx (8A4D)
  -  Add support for Omen 16-wf1xxx (8C76)
 
 intel-hid:
  -  disable wakeup_mode during hibernation
 
 ISST:
  -  Check HWP support before MSR access
  -  Correct locked bit width
 
 lenovo: wmi-gamezone:
  -  Drop gz_chain_head
 
 MAINTAINERS:
  -  change email address of Denis Benato
 
 olpc: olpc-xo175-ec:
  -  Fix overflow error message to print inlen
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Merge tag 'fixes' into 'for-next'

Allows uniwill-laptop feature work that depends on changes in the fixes
branch proceed.
 2026-03-31 17:24:54 +03:00
Will Deacon
287c6981f1 KVM: arm64: Add some initial documentation for pKVM 
Add some initial documentation for pKVM to help people understand what
is supported, the limitations of protected VMs when compared to
non-protected VMs and also what is left to do.

Reviewed-by: Fuad Tabba <tabba@google.com>
Tested-by: Fuad Tabba <tabba@google.com>
Tested-by: Mostafa Saleh <smostafa@google.com>
Signed-off-by: Will Deacon <will@kernel.org>
Link: https://patch.msgid.link/20260330144841.26181-33-will@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
 2026-03-30 16:58:09 +01:00
Dai Ngo
f52792f484 NFSD: Enforce timeout on layout recall and integrate lease manager fencing 
When a layout conflict triggers a recall, enforcing a timeout is
necessary to prevent excessive nfsd threads from being blocked in
__break_lease ensuring the server continues servicing incoming
requests efficiently.

This patch introduces a new function to lease_manager_operations:

lm_breaker_timedout: Invoked when a lease recall times out and is
about to be disposed of. This function enables the lease manager
to inform the caller whether the file_lease should remain on the
flc_list or be disposed of.

For the NFSD lease manager, this function now handles layout recall
timeouts. If the layout type supports fencing and the client has not
been fenced, a fence operation is triggered to prevent the client
from accessing the block device.

While the fencing operation is in progress, the conflicting file_lease
remains on the flc_list until fencing is complete. This guarantees
that no other clients can access the file, and the client with
exclusive access is properly blocked before disposal.

Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
 2026-03-29 21:25:09 -04:00
Petr Mladek
4580900fe1 doc: watchdog: futher improvements 
Make further additions and alterations to the watchdog documentation.

Link: https://lkml.kernel.org/r/acF3tXBxSr0KOP9b@pathway.suse.cz
Signed-off-by: Petr Mladek <pmladek@suse.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Cc: Ian Rogers <irogers@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Li Huafei <lihuafei1@huawei.com>
Cc: Max Kellermann <max.kellermann@ionos.com>
Cc: Mayank Rungta <mrungta@google.com>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Stephane Erainan <eranian@google.com>
Cc: Wang Jinchao <wangjinchao600@gmail.com>
Cc: Yunhui Cui <cuiyunhui@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-03-27 21:19:47 -07:00
Mayank Rungta
cb8615f3cb doc: watchdog: document buddy detector 
The current documentation generalizes the hardlockup detector as primarily
NMI-perf-based and lacks details on the SMP "Buddy" detector.

Update the documentation to add a detailed description of the Buddy
detector, and also restructure the "Implementation" section to explicitly
separate "Softlockup Detector", "Hardlockup Detector (NMI/Perf)", and
"Hardlockup Detector (Buddy)".

Clarify that the softlockup hrtimer acts as the heartbeat generator for
both hardlockup mechanisms and centralize the configuration details in a
"Frequency and Heartbeats" section.

Link: https://lkml.kernel.org/r/20260312-hardlockup-watchdog-fixes-v2-5-45bd8a0cc7ed@google.com
Signed-off-by: Mayank Rungta <mrungta@google.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Cc: Ian Rogers <irogers@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Li Huafei <lihuafei1@huawei.com>
Cc: Max Kellermann <max.kellermann@ionos.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Stephane Erainan <eranian@google.com>
Cc: Wang Jinchao <wangjinchao600@gmail.com>
Cc: Yunhui Cui <cuiyunhui@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-03-27 21:19:47 -07:00
Mayank Rungta
de83258343 doc: watchdog: clarify hardlockup detection timing 
The current documentation implies that a hardlockup is strictly defined as
looping for "more than 10 seconds." However, the detection mechanism is
periodic (based on `watchdog_thresh`), meaning detection time varies
significantly depending on when the lockup occurs relative to the NMI perf
event.

Update the definition to remove the strict "more than 10 seconds"
constraint in the introduction and defer details to the Implementation
section.

Additionally, add a "Detection Overhead" section illustrating the Best
Case (~6s) and Worst Case (~20s) detection scenarios to provide
administrators with a clearer understanding of the watchdog's latency.

Link: https://lkml.kernel.org/r/20260312-hardlockup-watchdog-fixes-v2-3-45bd8a0cc7ed@google.com
Signed-off-by: Mayank Rungta <mrungta@google.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Cc: Ian Rogers <irogers@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Li Huafei <lihuafei1@huawei.com>
Cc: Max Kellermann <max.kellermann@ionos.com>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Stephane Erainan <eranian@google.com>
Cc: Wang Jinchao <wangjinchao600@gmail.com>
Cc: Yunhui Cui <cuiyunhui@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-03-27 21:19:47 -07:00
Aaron Tomlin
49085e1b70 hung_task: enable runtime reset of hung_task_detect_count 
Currently, the hung_task_detect_count sysctl provides a cumulative count
of hung tasks since boot.  In long-running, high-availability
environments, this counter may lose its utility if it cannot be reset once
an incident has been resolved.  Furthermore, the previous implementation
relied upon implicit ordering, which could not strictly guarantee that
diagnostic metadata published by one CPU was visible to the panic logic on
another.

This patch introduces the capability to reset the detection count by
writing "0" to the hung_task_detect_count sysctl.  The proc_handler logic
has been updated to validate this input and atomically reset the counter.

The synchronisation of sysctl_hung_task_detect_count relies upon a
transactional model to ensure the integrity of the detection counter
against concurrent resets from userspace.  The application of
atomic_long_read_acquire() and atomic_long_cmpxchg_release() is correct
and provides the following guarantees:

    1. Prevention of Load-Store Reordering via Acquire Semantics By
       utilising atomic_long_read_acquire() to snapshot the counter
       before initiating the task traversal, we establish a strict
       memory barrier. This prevents the compiler or hardware from
       reordering the initial load to a point later in the scan. Without
       this "acquire" barrier, a delayed load could potentially read a
       "0" value resulting from a userspace reset that occurred
       mid-scan. This would lead to the subsequent cmpxchg succeeding
       erroneously, thereby overwriting the user's reset with stale
       increment data.

    2. Atomicity of the "Commit" Phase via Release Semantics The
       atomic_long_cmpxchg_release() serves as the transaction's commit
       point. The "release" barrier ensures that all diagnostic
       recordings and task-state observations made during the scan are
       globally visible before the counter is incremented.

    3. Race Condition Resolution This pairing effectively detects any
       "out-of-band" reset of the counter. If
       sysctl_hung_task_detect_count is modified via the procfs
       interface during the scan, the final cmpxchg will detect the
       discrepancy between the current value and the "acquire" snapshot.
       Consequently, the update will fail, ensuring that a reset command
       from the administrator is prioritised over a scan that may have
       been invalidated by that very reset.

Link: https://lkml.kernel.org/r/20260303203031.4097316-3-atomlin@atomlin.com
Signed-off-by: Aaron Tomlin <atomlin@atomlin.com>
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Reviewed-by: Joel Granados <joel.granados@kernel.org>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Lance Yang <lance.yang@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-03-27 21:19:40 -07:00
H. Peter Anvin
ac66a73be0 x86/fred: Enable FRED by default 
When FRED was added to the mainline kernel, it was set up as an explicit
opt-in due to the risk of regressions before hardware was available publicly.

Now, Panther Lake (Core Ultra 300 series) has been released, and benchmarking
by Phoronix has shown that it provides a significant performance benefit on
most workloads:

  https://www.phoronix.com/review/intel-fred-panther-lake

Accordingly, enable FRED by default if the CPU supports it. FRED can of
course still be disabled via the fred=off command line option.

Touch up Kconfig help too.

Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Sohil Mehta <sohil.mehta@intel.com>
Link: https://patch.msgid.link/20260325230151.1898287-2-hpa@zytor.com
 2026-03-27 16:04:47 +01:00
Christoph Hellwig
829def1e35 zloop: forget write cache on force removal 
Add a new options that causes zloop to truncate the zone files to the
write pointer value recorded at the last cache flush to simulate
unclean shutdowns.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://patch.msgid.link/20260323071156.2940772-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
 2026-03-25 06:49:01 -06:00
Besar Wicaksono
2f89b7f78c perf: add NVIDIA Tegra410 C2C PMU 
Adds NVIDIA C2C PMU support in Tegra410 SOC. This PMU is
used to measure memory latency between the SOC and device
memory, e.g GPU Memory (GMEM), CXL Memory, or memory on
remote Tegra410 SOC.

Reviewed-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Signed-off-by: Besar Wicaksono <bwicaksono@nvidia.com>
Signed-off-by: Will Deacon <will@kernel.org>
 2026-03-24 12:37:33 +00:00
Besar Wicaksono
429b7638b2 perf: add NVIDIA Tegra410 CPU Memory Latency PMU 
Adds CPU Memory (CMEM) Latency PMU support in Tegra410 SOC.
The PMU is used to measure latency between the edge of the
Unified Coherence Fabric to the local system DRAM.

Reviewed-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Signed-off-by: Besar Wicaksono <bwicaksono@nvidia.com>
Signed-off-by: Will Deacon <will@kernel.org>
 2026-03-24 12:37:32 +00:00
Besar Wicaksono
3dd7302230 perf/arm_cspmu: nvidia: Add Tegra410 PCIE-TGT PMU 
Adds PCIE-TGT PMU support in Tegra410 SOC. This PMU is
instanced in each root complex in the SOC and it captures
traffic originating from any source towards PCIE BAR and CXL
HDM range. The traffic can be filtered based on the
destination root port or target address range.

Reviewed-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Signed-off-by: Besar Wicaksono <bwicaksono@nvidia.com>
Signed-off-by: Will Deacon <will@kernel.org>
 2026-03-24 12:37:32 +00:00
Besar Wicaksono
bf585ba147 perf/arm_cspmu: nvidia: Add Tegra410 PCIE PMU 
Adds PCIE PMU support in Tegra410 SOC. This PMU is instanced
in each root complex in the SOC and can capture traffic from
PCIE device to various memory types. This PMU can filter traffic
based on the originating root port or BDF and the target memory
types (CPU DRAM, GPU Memory, CXL Memory, or remote Memory).

Reviewed-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Signed-off-by: Besar Wicaksono <bwicaksono@nvidia.com>
Signed-off-by: Will Deacon <will@kernel.org>
 2026-03-24 12:37:32 +00:00
Besar Wicaksono
f5caf26fd6 perf/arm_cspmu: nvidia: Add Tegra410 UCF PMU 
The Unified Coherence Fabric (UCF) contains last level cache
and cache coherent interconnect in Tegra410 SOC. The PMU in
this device can be used to capture events related to access
to the last level cache and memory from different sources.

Reviewed-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Signed-off-by: Besar Wicaksono <bwicaksono@nvidia.com>
Signed-off-by: Will Deacon <will@kernel.org>
 2026-03-24 12:37:32 +00:00
Besar Wicaksono
d332424d1d perf/arm_cspmu: nvidia: Rename doc to Tegra241 
The documentation in nvidia-pmu.rst contains PMUs specific
to NVIDIA Tegra241 SoC. Rename the file for this specific
SoC to have better distinction with other NVIDIA SoC.

Signed-off-by: Besar Wicaksono <bwicaksono@nvidia.com>
Signed-off-by: Will Deacon <will@kernel.org>
 2026-03-24 12:37:32 +00:00
Thorsten Leemhuis
9d43740074 docs: reporting-issues: create a proper appendix explaining specialties 
Merge "Why some bugs remain unfixed and some reports are ignored" with
the closing words while rewriting and extending the text.

The result spends fewer words on explaining things that are normal in
FLOSS -- while outlining where the kernel is different and how that
makes bug reporting more complicated than in other FLOSS projects.

Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <473b36fa9723c46b7167004752f097e6c26d7278.1773750701.git.linux@leemhuis.info>
 2026-03-22 14:47:53 -06:00
Thorsten Leemhuis
a9a1c262df docs: verify-bugs-… and quickly-build-…: improve feedback section 
Mention sending patches in the section about feedback. This syncs them
with a section a earlier patch added to reporting-issues.rst, which
was based on these sections and improved during review.

Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <cb219ccd15271bfb99ecce01dcbdbb03cccd7be1.1773750701.git.linux@leemhuis.info>
 2026-03-22 14:47:53 -06:00
Thorsten Leemhuis
ceee0f73c3 docs: reporting-issues: add conclusion to the step-by-step guide 
Text based on a section
Documentation/admin-guide/verify-bugs-and-bisect-regressions.rst
and slightly improved after review feedback.

Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <bc18f678b6854879dc7691ecbb762d717da4baa3.1773750701.git.linux@leemhuis.info>
 2026-03-22 14:47:53 -06:00
Thorsten Leemhuis
83aa754da4 docs: reporting-issues: tweak the reference section intro 
Fine tuning to the intro of the reference section:

* Call the step-by-step guide what it is.
* Reorder the links to the guides on bug reporting to first mention the
  most modern one.
* Many small changes to streamline the text and slightly shorten it.

Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <cd3ae7b1724d3b16b86488166f756a976e0ee83a.1773750701.git.linux@leemhuis.info>
 2026-03-22 14:47:53 -06:00
Thorsten Leemhuis
c423d3295a docs: reporting-issues: mention text is best viewed rendered 
Add a comment before the step-by-step guide explaining that the document
is best viewed in the rendered form, as there the internal links will
work that later patches will add.

Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <f8e3577df4a231b66e8f638f7b41614bf15b49ab.1773750701.git.linux@leemhuis.info>
 2026-03-22 14:47:53 -06:00
Ingo Molnar
f6472b1793 Linux 7.0-rc4 
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Merge tag 'v7.0-rc4' into timers/core, to resolve conflict

Resolve conflict between this change in the upstream kernel:

  4c652a4772 ("rseq: Mark rseq_arm_slice_extension_timer() __always_inline")

... and this pending change in timers/core:

  0e98eb1481 ("entry: Prepare for deferred hrtimer rearming")

Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2026-03-21 08:02:36 +01:00
Thomas Gleixner
763aacf86f clocksource: Rewrite watchdog code completely 
The clocksource watchdog code has over time reached the state of an
impenetrable maze of duct tape and staples. The original design, which was
made in the context of systems far smaller than today, is based on the
assumption that the to be monitored clocksource (TSC) can be trivially
compared against a known to be stable clocksource (HPET/ACPI-PM timer).

Over the years it turned out that this approach has major flaws:

  - Long delays between watchdog invocations can result in wrap arounds
    of the reference clocksource

  - Scalability of the reference clocksource readout can degrade on large
    multi-socket systems due to interconnect congestion

This was addressed with various heuristics which degraded the accuracy of
the watchdog to the point that it fails to detect actual TSC problems on
older hardware which exposes slow inter CPU drifts due to firmware
manipulating the TSC to hide SMI time.

To address this and bring back sanity to the watchdog, rewrite the code
completely with a different approach:

  1) Restrict the validation against a reference clocksource to the boot
     CPU, which is usually the CPU/Socket closest to the legacy block which
     contains the reference source (HPET/ACPI-PM timer). Validate that the
     reference readout is within a bound latency so that the actual
     comparison against the TSC stays within 500ppm as long as the clocks
     are stable.

  2) Compare the TSCs of the other CPUs in a round robin fashion against
     the boot CPU in the same way the TSC synchronization on CPU hotplug
     works. This still can suffer from delayed reaction of the remote CPU
     to the SMP function call and the latency of the control variable cache
     line. But this latency is not affecting correctness. It only affects
     the accuracy. With low contention the readout latency is in the low
     nanoseconds range, which detects even slight skews between CPUs. Under
     high contention this becomes obviously less accurate, but still
     detects slow skews reliably as it solely relies on subsequent readouts
     being monotonically increasing. It just can take slightly longer to
     detect the issue.

  3) Rewrite the watchdog test so it tests the various mechanisms one by
     one and validating the result against the expectation.

Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Tested-by: Borislav Petkov (AMD) <bp@alien8.de>
Tested-by: Daniel J Blueman <daniel@quora.org>
Reviewed-by: Jiri Wiesner <jwiesner@suse.de>
Reviewed-by: Daniel J Blueman <daniel@quora.org>
Link: https://patch.msgid.link/20260123231521.926490888@kernel.org
Link: https://patch.msgid.link/87h5qeomm5.ffs@tglx
 2026-03-20 13:36:32 +01:00
Sohil Mehta
b36d1f53d9 x86/vsyscall: Disable LASS if vsyscall mode is set to EMULATE 
The EMULATE mode of vsyscall maps the vsyscall page with a high kernel
address directly into user address space. Reading the vsyscall page in
EMULATE mode would cause LASS to trigger a #GP.

Fixing the LASS violation in EMULATE mode would require complex
instruction decoding because the resulting #GP does include the
necessary error information, and the vsyscall address is not
readily available in the RIP.

The EMULATE mode has been deprecated since 2022 and can only be enabled
using the command line parameter vsyscall=emulate. See commit
bf00745e77 ("x86/vsyscall: Remove CONFIG_LEGACY_VSYSCALL_EMULATE") for
details. At this point, no one is expected to be using this insecure
mode. The rare usages that need it obviously do not care about security.

Disable LASS when EMULATE mode is requested to avoid breaking legacy
user software. Also, update the vsyscall documentation to reflect this.
LASS will only be supported if vsyscall mode is set to XONLY (default)
or NONE.

Signed-off-by: Sohil Mehta <sohil.mehta@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Tested-by: Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com>
Link: https://patch.msgid.link/20260309181029.398498-5-sohil.mehta@intel.com
 2026-03-19 15:11:13 -07:00
Jakub Kicinski
edab1ca5ec Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 
Cross-merge networking fixes after downstream PR (net-7.0-rc5).

net/netfilter/nft_set_rbtree.c
  598adea720 ("netfilter: revert nft_set_rbtree: validate open interval overlap")
  3aea466a43 ("netfilter: nft_set_rbtree: don't disable bh when acquiring tree lock")
https://lore.kernel.org/abgaQBpeGstdN4oq@sirena.org.uk

No adjacent changes.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-03-19 14:16:00 -07:00
Eric Biggers
7a60fe48af ima: remove buggy support for asynchronous hashes 
IMA computes hashes using the crypto_shash or crypto_ahash API.  The
latter is used only when ima.ahash_minsize is set on the command line,
and its purpose is ostensibly to make the hash computation faster.

However, going off the CPU to a crypto engine and back again is actually
quite slow, especially compared with the acceleration that is built into
modern CPUs and the kernel now enables by default for most algorithms.
Typical performance results for SHA-256 on a modern platform can be
found at https://lore.kernel.org/linux-crypto/20250615184638.GA1480@sol/

Partly for this reason, several other kernel subsystems have already
dropped support for the crypto_ahash API.

The other problem with crypto_ahash is that bugs are also common, not
just in the underlying drivers, but also in the code using it, since it
is very difficult to use correctly.  Just from a quick review, here are
some of the bugs I noticed in IMA's ahash code:

- [Use after free] ima_alloc_atfm() isn't thread-safe and can trigger a
  use-after-free if multiple threads try to initialize the global
  ima_ahash_tfm at the same time.

- [Deadlock] If only one buffer is allocated and there is an error
  reading from the file, then ahash_wait() is executed twice, causing a
  deadlock in wait_for_completion().

- [Crash or incorrect hash computed] calc_buffer_ahash_atfm() is
  sometimes passed stack buffers which can be vmalloc addresses, but it
  puts them in a scatterlist assuming they are linear addresses.  This
  causes the hashing to be done on the wrong physical address.

- [Truncation to 32-bit length] ima_alloc_pages() incorrectly assumes an
  loff_t value fits in an unsigned long.  calc_buffer_ahash_atfm()
  incorrectly assumes that a loff_t value fits in an unsigned int.

So, not exactly a great track record so far, even disregarding driver
bugs which are an even larger problem.  Fortunately, in practice it's
unlikely that many users are actually setting the ima.ahash_minsize
kernel command-line parameter which enables this code.  However, given
that this code is almost certainly no longer useful (if it ever was),
let's just remove it instead of attempting to fix all these issues.

Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Acked-by: Dmitry Kasatkin <dmitry.kasatkin@gmail.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
 2026-03-17 18:53:49 -04:00
Vishnu Sankar
fa5062e99b
Documentation: thinkpad-acpi - Document doubletap_enable attribute 
Document the doubletap_enable sysfs attribute for ThinkPad ACPI driver.

Signed-off-by: Vishnu Sankar <vishnuocv@gmail.com>
Link: https://patch.msgid.link/20260311143144.482145-4-vishnuocv@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
 2026-03-17 15:27:26 +02:00
Martin Tůma
6cc2b8d987 media:admin-guide:mgb4: Add zDML color mapping info 
Document the zDML (Audi Digital Matrix Light) color mapping option for
the inputs and the new outputs color mapping property.

Signed-off-by: Martin Tůma <martin.tuma@digiteqautomotive.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
 2026-03-16 11:51:55 +01:00
Linus Torvalds
69237f8c1f USB fixes for 7.0-rc4 
Here is a large chunk of USB driver fixes for 7.0-rc4.  Included in here
 are:
   - usb gadget reverts due to reported issues, and then a follow-on fix
     to hopefully resolve the reported overall problem
   - xhci driver fixes
   - dwc3 driver fixes
   - usb core "killable" bulk message api addition to fix a usbtmc driver
     bug where userspace could hang the driver for forever
   - small USB driver fixes for reported issues
   - new usb device quirks
 
 All except the last USB device quirk change have been in linux-next with
 no reported issues.  That one came in too late, and is "obviously
 correct" :)
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-7.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here is a large chunk of USB driver fixes for 7.0-rc4. Included in
  here are:

   - usb gadget reverts due to reported issues, and then a follow-on fix
     to hopefully resolve the reported overall problem

   - xhci driver fixes

   - dwc3 driver fixes

   - usb core "killable" bulk message api addition to fix a usbtmc
     driver bug where userspace could hang the driver for forever

   - small USB driver fixes for reported issues

   - new usb device quirks

  All except the last USB device quirk change have been in linux-next
  with no reported issues. That one came in too late, and is 'obviously
  correct' :)"

* tag 'usb-7.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (35 commits)
  USB: ezcap401 needs USB_QUIRK_NO_BOS to function on 10gbs usb speed
  usb: roles: get usb role switch from parent only for usb-b-connector
  Revert "tcpm: allow looking for role_sw device in the main node"
  usb: gadget: f_ncm: Fix net_device lifecycle with device_move
  Revert "usb: gadget: u_ether: add gether_opts for config caching"
  Revert "usb: gadget: u_ether: use <linux/hex.h> header file"
  Revert "usb: gadget: u_ether: Add auto-cleanup helper for freeing net_device"
  Revert "usb: gadget: f_ncm: align net_device lifecycle with bind/unbind"
  Revert "usb: legacy: ncm: Fix NPE in gncm_bind"
  Revert "usb: gadget: f_ncm: Fix atomic context locking issue"
  usb: typec: altmode/displayport: set displayport signaling rate in configure message
  usb: dwc3: pci: add support for the Intel Nova Lake -H
  usb/core/quirks: Add Huawei ME906S-device to wakeup quirk
  usb: gadget: uvc: fix interval_duration calculation
  xhci: Fix NULL pointer dereference when reading portli debugfs files
  usb: xhci: Prevent interrupt storm on host controller error (HCE)
  usb: xhci: Fix memory leak in xhci_disable_slot()
  usb: class: cdc-wdm: fix reordering issue in read code path
  usb: renesas_usbhs: fix use-after-free in ISR during device removal
  usb: cdc-acm: Restore CAP_BRK functionnality to CH343
  ...
 2026-03-14 09:43:12 -07:00
Rafael J. Wysocki
f862f29196 Merge back ACPI OS services layer (OSL) material for 7.1 2026-03-12 21:16:46 +01:00
Jakub Kicinski
72374257ed Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 
Cross-merge networking fixes after downstream PR (net-7.0-rc4).

drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
  db25c42c2e ("net/mlx5e: RX, Fix XDP multi-buf frag counting for striding RQ")
  dff1c3164a ("net/mlx5e: SHAMPO, Always calculate page size")
https://lore.kernel.org/aa7ORohmf67EKihj@sirena.org.uk

drivers/net/ethernet/ti/am65-cpsw-nuss.c
  840c9d13cb ("net: ethernet: ti: am65-cpsw-nuss: Fix rx_filter value for PTP support")
  a23c657e33 ("net: ethernet: ti: am65-cpsw: Use also port number to identify timestamps")
https://lore.kernel.org/abK3EkIXuVgMyGI7@sirena.org.uk

No adjacent changes.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-03-12 12:53:34 -07:00
Alexander Graf
0de607dc4f vsock: add G2H fallback for CIDs not owned by H2G transport 
When no H2G transport is loaded, vsock currently routes all CIDs to the
G2H transport (commit 65b422d9b6 ("vsock: forward all packets to the
host when no H2G is registered"). Extend that existing behavior: when
an H2G transport is loaded but does not claim a given CID, the
connection falls back to G2H in the same way.

This matters in environments like Nitro Enclaves, where an instance may
run nested VMs via vhost-vsock (H2G) while also needing to reach sibling
enclaves at higher CIDs through virtio-vsock-pci (G2H). With the old
code, any CID > 2 was unconditionally routed to H2G when vhost was
loaded, making those enclaves unreachable without setting
VMADDR_FLAG_TO_HOST explicitly on every connect.

Requiring every application to set VMADDR_FLAG_TO_HOST creates friction:
tools like socat, iperf, and others would all need to learn about it.
The flag was introduced 6 years ago and I am still not aware of any tool
that supports it. Even if there was support, it would be cumbersome to
use. The most natural experience is a single CID address space where H2G
only wins for CIDs it actually owns, and everything else falls through to
G2H, extending the behavior that already exists when H2G is absent.

To give user space at least a hint that the kernel applied this logic,
automatically set the VMADDR_FLAG_TO_HOST on the remote address so it
can determine the path taken via getpeername().

Add a per-network namespace sysctl net.vsock.g2h_fallback (default 1).
At 0 it forces strict routing: H2G always wins for CID > VMADDR_CID_HOST,
or ENODEV if H2G is not loaded.

Signed-off-by: Alexander Graf <graf@amazon.com>
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://patch.msgid.link/20260304230027.59857-1-graf@amazon.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
 2026-03-12 10:59:36 +01:00
Jie Deng
9f6a983cfa usb: core: new quirk to handle devices with zero configurations 
Some USB devices incorrectly report bNumConfigurations as 0 in their
device descriptor, which causes the USB core to reject them during
enumeration.
logs:
usb 1-2: device descriptor read/64, error -71
usb 1-2: no configurations
usb 1-2: can't read configurations, error -22

However, these devices actually work correctly when
treated as having a single configuration.

Add a new quirk USB_QUIRK_FORCE_ONE_CONFIG to handle such devices.
When this quirk is set, assume the device has 1 configuration instead
of failing with -EINVAL.

This quirk is applied to the device with VID:PID 5131:2007 which
exhibits this behavior.

Signed-off-by: Jie Deng <dengjie03@kylinos.cn>
Link: https://patch.msgid.link/20260227084931.1527461-1-dengjie03@kylinos.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2026-03-11 16:17:19 +01:00
Jai Luthra
70eaeee95f media: staging: Drop starfive-camss from staging 
The starfive-camss driver is no longer being worked upon for destaging,
as confirmed by the maintainer, so drop it.

Link: https://lore.kernel.org/all/ZQ0PR01MB13024A92926C415C187D2C18F29F2@ZQ0PR01MB1302.CHNPR01.prod.partner.outlook.cn/
Acked-by: Changhuang Liang <changhuang.liang@starfivetech.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jai Luthra <jai.luthra@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
 2026-03-11 01:05:30 +01:00
Linus Torvalds
b4f0dd314b 15 hotfixes. 6 are cc:stable. 14 are for MM. 
Singletons, with one doubleton - please see the changelogs for details.
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Merge tag 'mm-hotfixes-stable-2026-03-09-16-36' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc fixes from Andrew Morton:
 "15 hotfixes. 6 are cc:stable. 14 are for MM.

  Singletons, with one doubleton - please see the changelogs for details"

* tag 'mm-hotfixes-stable-2026-03-09-16-36' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  MAINTAINERS, mailmap: update email address for Lorenzo Stoakes
  mm/mmu_notifier: clean up mmu_notifier.h kernel-doc
  uaccess: correct kernel-doc parameter format
  mm/huge_memory: fix a folio_split() race condition with folio_try_get()
  MAINTAINERS: add co-maintainer and reviewer for SLAB ALLOCATOR
  MAINTAINERS: add RELAY entry
  memcg: fix slab accounting in refill_obj_stock() trylock path
  mm/hugetlb.c: use __pa() instead of virt_to_phys() in early bootmem alloc code
  zram: rename writeback_compressed device attr
  tools/testing: fix testing/vma and testing/radix-tree build
  Revert "ptdesc: remove references to folios from __pagetable_ctor() and pagetable_dtor()"
  mm/cma: move put_page_testzero() out of VM_WARN_ON in cma_release()
  mm/damon/core: clear walk_control on inactive context in damos_walk()
  mm: memfd_luo: always dirty all folios
  mm: memfd_luo: always make all folios uptodate
 2026-03-10 12:47:56 -07:00
Eric Biggers
05777b2800 dm-verity-fec: improve documentation for Forward Error Correction 
Update verity.rst to add a dedicated section about FEC and improve the
documentation for the FEC-related parameters.

Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
 2026-03-09 15:11:50 +01:00
Linus Torvalds
54de8b835b platform-drivers-x86 for v7.0-2 
Fixes and New HW Support
 
 - alienware-wmi-wmax: Add G-Mode support to m18 laptops
 
 - asus-armoury: Add support for FA401UM, G733QS, GX650RX
 
 - dell-wmi-sysman: Don't hex dump plaintext password data
 
 - hp-bioscfg: Support large number of enumeration attributes
 
 - hp-wmi: Add support for Omen 14-fb1xxx, 16-xd0xxx and 16-wf0xxx,
           Victus-d0xxx
 
 - int3472: Handle GPIO type 0x10 (DOVDD)
 
 - intel-hid:
   - Add Dell 14 & 16 Plus 2-in-1 to dmi_vgbs_allow_list
   - Enable 5-button array on ThinkPad X1 Fold 16 Gen 1
 
 - mellanox: mlxreg: Fix kernel-doc warnings
 
 - oxpec: Add support for OneXPlayer X1 Air, X1z, APEX, and Aokzoe A2 Pro
 
 - redmi-wmi: Add more Fn hotkey mappings
 
 - thinkpad_acpi: Fix errors reading battery thresholds
 
 - touchscreen_dmi: Add quirk for y-inverted Goodix touchscreen on SUPI S10
 
 - uniwill-laptop:
   - FN lock/super key lock attributes rename
   - Fix crash on unexpected battery event
   - A special key combination can alter FN lock status so mark it volatile
   - Handle FN lock event
 
 The following is an automated shortlog grouped by driver:
 
 alienware-wmi-wmax:
  -  Add G-Mode support to m18 laptops
 
 asus-armoury:
  -  add support for FA401UM
  -  add support for G733QS
  -  add support for GX650RX
 
 dell-wmi:
  -  Add audio/mic mute key codes
 
 dell-wmi-sysman:
  -  Don't hex dump plaintext password data
 
 hp-bioscfg:
  -  Support allocations of larger data
 
 hp-wmi:
  -  add Omen 14-fb1xxx (board 8E41) support
  -  Add Omen 16-wf0xxx fan and thermal support
  -  Add Omen 16-xd0xxx fan and thermal support
  -  Add Victus 16-d0xxx support
 
 int3472:
  -  Handle GPIO type 0x10 (DOVDD)
 
 intel-hid:
  -  Add Dell 14 Plus 2-in-1 to dmi_vgbs_allow_list
  -  Add Dell 16 Plus 2-in-1 to dmi_vgbs_allow_list
  -  Enable 5-button array on ThinkPad X1 Fold 16 Gen 1
 
 oxpec:
  -  Add support for Aokzoe A2 Pro
  -  Add support for OneXPlayer APEX
  -  Add support for OneXPlayer X1 Air
  -  Add support for OneXPlayer X1z
 
 platform_data/mlxreg: mlxreg.h:
  -  fix all kernel-doc warnings
 
 redmi-wmi:
  -  Add more hotkey mappings
 
 thinkpad_acpi:
  -  Fix errors reading battery thresholds
 
 touchscreen_dmi:
  -  Add quirk for y-inverted Goodix touchscreen on SUPI S10
 
 uniwill-laptop:
  -  Fix crash on unexpected battery event
  -  Handle FN lock event
  -  Mark FN lock status as being volatile
  -  Rename FN lock and super key lock attrs
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Merge tag 'platform-drivers-x86-v7.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

Pull x86 platform driver fixes from Ilpo Järvinen:

 - alienware-wmi-wmax: Add G-Mode support to m18 laptops

 - asus-armoury: Add support for FA401UM, G733QS, GX650RX

 - dell-wmi-sysman: Don't hex dump plaintext password data

 - hp-bioscfg: Support large number of enumeration attributes

 - hp-wmi: Add support for Omen 14-fb1xxx, 16-xd0xxx, 16-wf0xxx, and
   Victus-d0xxx

 - int3472: Handle GPIO type 0x10 (DOVDD)

 - intel-hid:
     - Add Dell 14 & 16 Plus 2-in-1 to dmi_vgbs_allow_list
     - Enable 5-button array on ThinkPad X1 Fold 16 Gen 1

 - mellanox: mlxreg: Fix kernel-doc warnings

 - oxpec: Add support for OneXPlayer X1 Air, X1z, APEX, and Aokzoe A2
   Pro

 - redmi-wmi: Add more Fn hotkey mappings

 - thinkpad_acpi: Fix errors reading battery thresholds

 - touchscreen_dmi: Add quirk for y-inverted Goodix touchscreen on SUPI
   S10

 - uniwill-laptop:
     - FN lock/super key lock attributes rename
     - Fix crash on unexpected battery event
     - A special key combination can alter FN lock status so mark it
       volatile
     - Handle FN lock event

* tag 'platform-drivers-x86-v7.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (27 commits)
  platform/x86: dell-wmi-sysman: Don't hex dump plaintext password data
  platform_data/mlxreg: mlxreg.h: fix all kernel-doc warnings
  platform/x86: asus-armoury: add support for FA401UM
  platform/x86: asus-armoury: add support for GX650RX
  platform/x86: hp-bioscfg: Support allocations of larger data
  platform/x86: oxpec: Add support for Aokzoe A2 Pro
  platform/x86: oxpec: Add support for OneXPlayer X1 Air
  platform/x86: oxpec: Add support for OneXPlayer X1z
  platform/x86: oxpec: Add support for OneXPlayer APEX
  platform/x86: uniwill-laptop: Handle FN lock event
  platform/x86: uniwill-laptop: Mark FN lock status as being volatile
  platform/x86: uniwill-laptop: Fix crash on unexpected battery event
  platform/x86: uniwill-laptop: Rename FN lock and super key lock attrs
  platform/x86: redmi-wmi: Add more hotkey mappings
  platform/x86: alienware-wmi-wmax: Add G-Mode support to m18 laptops
  platform/x86: hp-wmi: add Omen 14-fb1xxx (board 8E41) support
  platform/x86: dell-wmi: Add audio/mic mute key codes
  platform/x86: hp-wmi: Add Victus 16-d0xxx support
  platform/x86: intel-hid: Enable 5-button array on ThinkPad X1 Fold 16 Gen 1
  platform/x86: int3472: Handle GPIO type 0x10 (DOVDD)
  ...
 2026-03-06 09:48:50 -08:00
Linus Torvalds
a028739a43 block-7.0-20260305 
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Merge tag 'block-7.0-20260305' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux

Pull block fixes from Jens Axboe:

 - NVMe pull request via Keith:
      - Improve quirk visibility and configurability (Maurizio)
      - Fix runtime user modification to queue setup (Keith)
      - Fix multipath leak on try_module_get failure (Keith)
      - Ignore ambiguous spec definitions for better atomics support
        (John)
      - Fix admin queue leak on controller reset (Ming)
      - Fix large allocation in persistent reservation read keys
        (Sungwoo Kim)
      - Fix fcloop callback handling (Justin)
      - Securely free DHCHAP secrets (Daniel)
      - Various cleanups and typo fixes (John, Wilfred)

 - Avoid a circular lock dependency issue in the sysfs nr_requests or
   scheduler store handling

 - Fix a circular lock dependency with the pcpu mutex and the queue
   freeze lock

 - Cleanup for bio_copy_kern(), using __bio_add_page() rather than the
   bio_add_page(), as adding a page here cannot fail. The exiting code
   had broken cleanup for the error condition, so make it clear that the
   error condition cannot happen

 - Fix for a __this_cpu_read() in preemptible context splat

* tag 'block-7.0-20260305' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
  block: use trylock to avoid lockdep circular dependency in sysfs
  nvme: fix memory allocation in nvme_pr_read_keys()
  block: use __bio_add_page in bio_copy_kern
  block: break pcpu_alloc_mutex dependency on freeze_lock
  blktrace: fix __this_cpu_read/write in preemptible context
  nvme-multipath: fix leak on try_module_get failure
  nvmet-fcloop: Check remoteport port_state before calling done callback
  nvme-pci: do not try to add queue maps at runtime
  nvme-pci: cap queue creation to used queues
  nvme-pci: ensure we're polling a polled queue
  nvme: fix memory leak in quirks_param_set()
  nvme: correct comment about nvme_ns_remove()
  nvme: stop setting namespace gendisk device driver data
  nvme: add support for dynamic quirk configuration via module parameter
  nvme: fix admin queue leak on controller reset
  nvme-fabrics: use kfree_sensitive() for DHCHAP secrets
  nvme: stop using AWUPF
  nvme: expose active quirks in sysfs
  nvme/host: fixup some typos
 2026-03-06 08:36:18 -08:00
Sergey Senozhatsky
ba4c3698e6 zram: rename writeback_compressed device attr 
Rename writeback_compressed attr to compressed_writeback to avoid possible
confusion and have more natural naming.  writeback_compressed may look
like an alternative version of writeback while in fact
writeback_compressed only sets a writeback property.  Make this
distinction more clear with a new compressed_writeback name.

This updates a feature which is new in 7.0-rcX.

Link: https://lkml.kernel.org/r/20260226025429.1042083-1-senozhatsky@chromium.org
Fixes: 4c1d61389e ("zram: introduce writeback_compressed device attribute")
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Suggested-by: Minchan Kim <minchan@kernel.org>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Brian Geffon <bgeffon@google.com>
Cc: Richard Chang <richardycc@google.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: "Christoph Böhmwalder" <christoph.boehmwalder@linbit.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Lars Ellenberg <lars.ellenberg@linbit.com>
Cc: Philipp Reisner <philipp.reisner@linbit.com>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-03-04 09:44:23 -08:00
Jens Axboe
d90c470b0e nvme fixes for Linux 7.0 
- Improve quirk visibility and configurability (Maurizio)
  - Fix runtime user modification to queue setup (Keith)
  - Fix multipath leak on try_module_get failure (Keith)
  - Ignore ambiguous spec definitions for better atomics support (John)
  - Fix admin queue leak on controller reset (Ming)
  - Fix large allocation in persistent reservation read keys (Sungwoo Kim)
  - Fix fcloop callback handling (Justin)
  - Securely free DHCHAP secrets (Daniel)
  - Various cleanups and typo fixes (John, Wilfred)
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Merge tag 'nvme-7.0-2026-03-04' of git://git.infradead.org/nvme into block-7.0

Pull NVMe fixes from Keith:

"- Improve quirk visibility and configurability (Maurizio)
 - Fix runtime user modification to queue setup (Keith)
 - Fix multipath leak on try_module_get failure (Keith)
 - Ignore ambiguous spec definitions for better atomics support (John)
 - Fix admin queue leak on controller reset (Ming)
 - Fix large allocation in persistent reservation read keys (Sungwoo Kim)
 - Fix fcloop callback handling (Justin)
 - Securely free DHCHAP secrets (Daniel)
 - Various cleanups and typo fixes (John, Wilfred)"

* tag 'nvme-7.0-2026-03-04' of git://git.infradead.org/nvme:
  nvme: fix memory allocation in nvme_pr_read_keys()
  nvme-multipath: fix leak on try_module_get failure
  nvmet-fcloop: Check remoteport port_state before calling done callback
  nvme-pci: do not try to add queue maps at runtime
  nvme-pci: cap queue creation to used queues
  nvme-pci: ensure we're polling a polled queue
  nvme: fix memory leak in quirks_param_set()
  nvme: correct comment about nvme_ns_remove()
  nvme: stop setting namespace gendisk device driver data
  nvme: add support for dynamic quirk configuration via module parameter
  nvme: fix admin queue leak on controller reset
  nvme-fabrics: use kfree_sensitive() for DHCHAP secrets
  nvme: stop using AWUPF
  nvme: expose active quirks in sysfs
  nvme/host: fixup some typos
 2026-03-04 08:15:17 -07:00
Shubham Chakraborty
6801cc4936 docs: sysctl: add documentation for crypto and debug 
Add documentation for the /proc/sys/crypto and /proc/sys/debug
directories in the admin-guide. This includes tunables for FIPS
mode (fips_enabled, fips_name, fips_version), exception-trace,
and kprobes-optimization.

The documentation is based on source code analysis and addresses
stylistic feedback to keep it direct and concise.

Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Shubham Chakraborty <chakrabortyshubham66@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260223203724.20874-1-chakrabortyshubham66@gmail.com>
 2026-03-03 10:26:44 -07:00
Armin Wolf
591230c6f2 ACPI: OSL: Poweroff when encountering a fatal ACPI error 
The ACPI spec states that the operating system should respond
to a fatal ACPI error by "performing a controlled OS shutdown in
a timely fashion". Comply with the ACPI specification by powering
off the system when ACPICA signals a fatal ACPI error. Users can
still disable this behavior by using the acpi.poweroff_on_fatal
kernel option to work around firmware bugs.

Link: https://uefi.org/specs/ACPI/6.6/19_ASL_Reference.html#fatal-fatal-error-check
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
[ rjw: Dropped the new Kconfig option, adjusted header file inclusions ]
Link: https://patch.msgid.link/20260204212931.3860-1-W_Armin@gmx.de
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-02-27 21:24:41 +01:00
Bobby Eshleman
b6302e057f vsock: document write-once behavior of the child_ns_mode sysctl 
Update the vsock child_ns_mode documentation to include the new
write-once semantics of setting child_ns_mode. The semantics are
implemented in a preceding patch in this series.

Signed-off-by: Bobby Eshleman <bobbyeshleman@meta.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://patch.msgid.link/20260223-vsock-ns-write-once-v3-3-c0cde6959923@meta.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
 2026-02-26 11:10:03 +01:00
Pranav Kharche
4058b259b9 docs: kernel-parameters: Fix repeated word in initramfs_options entry 
Remove the duplicate word 'for' in the initramfs_options description.

Signed-off-by: Pranav Kharche <pranavkharche7@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260225132951.36624-1-pranavkharche7@gmail.com>
 2026-02-25 10:35:46 -07:00
Randy Dunlap
95c0cd8bee docs: admin-guide: update tiny script for number of taint flags 
Account for 2 new taint flags being added by increasing the number of
bits handled by the tiny show-tainted-flags example script.

Fixes: 8eea4e7447 ("taint: Add TAINT_FWCTL")
Fixes: 2852ca7fba ("panic: Taint kernel if tests are run")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260216063729.2832770-1-rdunlap@infradead.org>
 2026-02-23 14:37:20 -07:00
Armin Wolf
2d53dfacf0
platform/x86: uniwill-laptop: Rename FN lock and super key lock attrs 
It turns out that both sysfs attributes actually directly control
the FN lock status/super key enable status, rather than the
triggering of the associated events. This behavior was first observed
on a Tuxedo notebook and was belived to be a hardware quirk.
However, it seems that i simply misunderstood the manual of the
OEM software for Intel NUC devices. The correct behavior is:

- fn_lock_toggle_enable enables/disables FN lock mode
- super_key_toggle_enable enables/disables the super key

Rename both sysfs attributes to avoid confusing users.

Fixes: d050479693 ("platform/x86: Add Uniwill laptop driver")
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://patch.msgid.link/20260218005101.73680-2-W_Armin@gmx.de
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
 2026-02-23 18:06:38 +02:00
Linus Torvalds
8bf22c33e7 Including fixes from Netfilter. 
Current release - new code bugs:
 
  - net: fix backlog_unlock_irq_restore() vs CONFIG_PREEMPT_RT
 
  - eth: mlx5e: XSK, Fix unintended ICOSQ change
 
  - phy_port: correctly recompute the port's linkmodes
 
  - vsock: prevent child netns mode switch from local to global
 
  - couple of kconfig fixes for new symbols
 
 Previous releases - regressions:
 
  - nfc: nci: fix false-positive parameter validation for packet data
 
  - net: do not delay zero-copy skbs in skb_attempt_defer_free()
 
 Previous releases - always broken:
 
  - mctp: ensure our nlmsg responses to user space are zero-initialised
 
  - ipv6: ioam: fix heap buffer overflow in __ioam6_fill_trace_data()
 
  - fixes for ICMP rate limiting
 
 Misc:
 
  - intel: fix PCI device ID conflict between i40e and ipw2200
 
 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Including fixes from Netfilter.

  Current release - new code bugs:

   - net: fix backlog_unlock_irq_restore() vs CONFIG_PREEMPT_RT

   - eth: mlx5e: XSK, Fix unintended ICOSQ change

   - phy_port: correctly recompute the port's linkmodes

   - vsock: prevent child netns mode switch from local to global

   - couple of kconfig fixes for new symbols

  Previous releases - regressions:

   - nfc: nci: fix false-positive parameter validation for packet data

   - net: do not delay zero-copy skbs in skb_attempt_defer_free()

  Previous releases - always broken:

   - mctp: ensure our nlmsg responses to user space are zero-initialised

   - ipv6: ioam: fix heap buffer overflow in __ioam6_fill_trace_data()

   - fixes for ICMP rate limiting

  Misc:

   - intel: fix PCI device ID conflict between i40e and ipw2200"

* tag 'net-7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (85 commits)
  net: nfc: nci: Fix parameter validation for packet data
  net/mlx5e: Use unsigned for mlx5e_get_max_num_channels
  net/mlx5e: Fix deadlocks between devlink and netdev instance locks
  net/mlx5e: MACsec, add ASO poll loop in macsec_aso_set_arm_event
  net/mlx5: Fix misidentification of write combining CQE during poll loop
  net/mlx5e: Fix misidentification of ASO CQE during poll loop
  net/mlx5: Fix multiport device check over light SFs
  bonding: alb: fix UAF in rlb_arp_recv during bond up/down
  bnge: fix reserving resources from FW
  eth: fbnic: Advertise supported XDP features.
  rds: tcp: fix uninit-value in __inet_bind
  net/rds: Fix NULL pointer dereference in rds_tcp_accept_one
  octeontx2-af: Fix default entries mcam entry action
  net/mlx5e: XSK, Fix unintended ICOSQ change
  ipv6: icmp: icmpv6_xrlim_allow() optimization if net.ipv6.icmp.ratelimit is zero
  ipv4: icmp: icmpv4_xrlim_allow() optimization if net.ipv4.icmp_ratelimit is zero
  ipv6: icmp: remove obsolete code in icmpv6_xrlim_allow()
  inet: move icmp_global_{credit,stamp} to a separate cache line
  icmp: prevent possible overflow in icmp_global_allow()
  selftests/net: packetdrill: add ipv4-mapped-ipv6 tests
  ...
 2026-02-19 10:39:08 -08:00
Linus Torvalds
c3c1e98533 More power management updates for 7.0-rc1 
- Fix the handling of package-scope MSRs in the intel_rapl power
    capping driver when called from the PMU subsystem and make it add all
    package CPUs to the PMU cpumask to allow tools to read RAPL events
    from any CPU in the package (Kuppuswamy Satharayananyan)
 
  - Rework the invalid version check in the intel_rapl_tpmi power capping
    driver to account for the fact that on partitioned systems, multiple
    TPMI instances may exist per package, but RAPL registers are only
    valid on one instance (Kuppuswamy Satharayananyan)
 
  - Describe the new intel_idle.table command line option in the
    admin-guide intel_idle documentation (Artem Bityutskiy)
 
  - Fix a crash in the ladder cpuidle governor on systems with only one
    (polling) idle state available by making the cpuidle core bypass the
    governor in those cases and adjust the other existing governors to
    that change (Aboorva Devarajan, Christian Loehle)
 
  - Update kerneldoc comments for wake IRQ management functions that
    have not been matching the code (Wang Jiayue)
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Merge tag 'pm-7.0-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more power management updates from Rafael Wysocki:
 "These are mostly fixes on top of the power management updates merged
  recently in cpuidle governors, in the Intel RAPL power capping driver
  and in the wake IRQ management code:

   - Fix the handling of package-scope MSRs in the intel_rapl power
     capping driver when called from the PMU subsystem and make it add
     all package CPUs to the PMU cpumask to allow tools to read RAPL
     events from any CPU in the package (Kuppuswamy Satharayananyan)

   - Rework the invalid version check in the intel_rapl_tpmi power
     capping driver to account for the fact that on partitioned systems,
     multiple TPMI instances may exist per package, but RAPL registers
     are only valid on one instance (Kuppuswamy Satharayananyan)

   - Describe the new intel_idle.table command line option in the
     admin-guide intel_idle documentation (Artem Bityutskiy)

   - Fix a crash in the ladder cpuidle governor on systems with only one
     (polling) idle state available by making the cpuidle core bypass
     the governor in those cases and adjust the other existing governors
     to that change (Aboorva Devarajan, Christian Loehle)

   - Update kerneldoc comments for wake IRQ management functions that
     have not been matching the code (Wang Jiayue)"

* tag 'pm-7.0-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpuidle: menu: Remove single state handling
  cpuidle: teo: Remove single state handling
  cpuidle: haltpoll: Remove single state handling
  cpuidle: Skip governor when only one idle state is available
  powercap: intel_rapl_tpmi: Remove FW_BUG from invalid version check
  PM: sleep: wakeirq: Update outdated documentation comments
  Documentation: PM: Document intel_idle.table command line option
  powercap: intel_rapl: Expose all package CPUs in PMU cpumask
  powercap: intel_rapl: Remove incorrect CPU check in PMU context
 2026-02-18 14:11:47 -08:00
Stefano Garzarella
a07c33c6f2 vsock: document namespace mode sysctls 
Add documentation for the vsock per-namespace sysctls (`ns_mode` and
`child_ns_mode`) to Documentation/admin-guide/sysctl/net.rst.
These sysctls were introduced by commit eafb64f40c ("vsock: add
netns to vsock core").

Document the two namespace modes (`global` and `local`), the
inheritance behavior of `child_ns_mode`, and the restriction preventing
local namespaces from setting `child_ns_mode` to `global`.

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://patch.msgid.link/20260216163147.236844-1-sgarzare@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-02-17 17:20:21 -08:00
Linus Torvalds
17f8d20093 USB / Thunderbolt changes for 7.0-rc1 
Here is the "big" set of USB and Thunderbolt driver updates for 7.0-rc1.
 Overall more lines were removed than added, thanks to dropping the
 obsolete isp1362 USB host controller driver, always a nice change.
 
 Other than that, nothing major happening here, highlights are:
   - lots of dwc3 driver updates and new hardware support added
   - usb gadget function driver updates
   - usb phy driver updates
   - typec driver updates and additions
   - USB rust binding updates for syntax and formatting changes
   - more usb serial device ids added
   - other smaller USB core and driver updates and additions
 
 All of these have been in linux-next for a long time, with no reported
 problems.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB / Thunderbolt updates from Greg KH:
 "Here is the "big" set of USB and Thunderbolt driver updates for
  7.0-rc1. Overall more lines were removed than added, thanks to
  dropping the obsolete isp1362 USB host controller driver, always a
  nice change.

  Other than that, nothing major happening here, highlights are:

   - lots of dwc3 driver updates and new hardware support added

   - usb gadget function driver updates

   - usb phy driver updates

   - typec driver updates and additions

   - USB rust binding updates for syntax and formatting changes

   - more usb serial device ids added

   - other smaller USB core and driver updates and additions

  All of these have been in linux-next for a long time, with no reported
  problems"

* tag 'usb-7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (77 commits)
  usb: typec: ucsi: Add Thunderbolt alternate mode support
  usb: typec: hd3ss3220: Check if regulator needs to be switched
  usb: phy: tegra: parametrize PORTSC1 register offset
  usb: phy: tegra: parametrize HSIC PTS value
  usb: phy: tegra: return error value from utmi_wait_register
  usb: phy: tegra: cosmetic fixes
  dt-bindings: usb: renesas,usbhs: Add RZ/G3E SoC support
  usb: dwc2: fix resume failure if dr_mode is host
  usb: cdns3: fix role switching during resume
  usb: dwc3: gadget: Move vbus draw to workqueue context
  USB: serial: option: add Telit FN920C04 RNDIS compositions
  usb: dwc3: Log dwc3 address in traces
  usb: gadget: tegra-xudc: Add handling for BLCG_COREPLL_PWRDN
  usb: phy: tegra: add HSIC support
  usb: phy: tegra: use phy type directly
  usb: typec: ucsi: Enforce mode selection for cros_ec_ucsi
  usb: typec: ucsi: Support mode selection to activate altmodes
  usb: typec: Introduce mode_selection bit
  usb: typec: Implement mode selection
  usb: typec: Expose alternate mode priority via sysfs
  ...
 2026-02-17 09:36:43 -08:00
Linus Torvalds
505d195b0f Char/Misc/IIO driver changes for 7.0-rc1 
Here is the big set of char/misc/iio and other smaller driver subsystem
 changes for 7.0-rc1.  Lots of little things in here, including:
   - Loads of iio driver changes and updates and additions
   - gpib driver updates
   - interconnect driver updates
   - i3c driver updates
   - hwtracing (coresight and intel) driver updates
   - deletion of the obsolete mwave driver
   - binder driver updates (rust and c versions)
   - mhi driver updates (causing a merge conflict, see below)
   - mei driver updates
   - fsi driver updates
   - eeprom driver updates
   - lots of other small char and misc driver updates and cleanups
 
 All of these have been in linux-next for a while, with no reported
 issues except for a merge conflict with your tree due to the mhi driver
 changes in the drivers/net/wireless/ath/ath12k/mhi.c file.  To fix that
 up, just delete the "auto_queue" structure fields being set, see this
 message for the full change needed:
 	https://lore.kernel.org/r/aXD6X23btw8s-RZP@sirena.org.uk
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc/IIO driver updates from Greg KH:
 "Here is the big set of char/misc/iio and other smaller driver
  subsystem changes for 7.0-rc1. Lots of little things in here,
  including:

   - Loads of iio driver changes and updates and additions

   - gpib driver updates

   - interconnect driver updates

   - i3c driver updates

   - hwtracing (coresight and intel) driver updates

   - deletion of the obsolete mwave driver

   - binder driver updates (rust and c versions)

   - mhi driver updates (causing a merge conflict, see below)

   - mei driver updates

   - fsi driver updates

   - eeprom driver updates

   - lots of other small char and misc driver updates and cleanups

  All of these have been in linux-next for a while, with no reported
  issues"

* tag 'char-misc-7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (297 commits)
  mux: mmio: fix regmap leak on probe failure
  rust_binder: return p from rust_binder_transaction_target_node()
  drivers: android: binder: Update ARef imports from sync::aref
  rust_binder: fix needless borrow in context.rs
  iio: magn: mmc5633: Fix Kconfig for combination of I3C as module and driver builtin
  iio: sca3000: Fix a resource leak in sca3000_probe()
  iio: proximity: rfd77402: Add interrupt handling support
  iio: proximity: rfd77402: Document device private data structure
  iio: proximity: rfd77402: Use devm-managed mutex initialization
  iio: proximity: rfd77402: Use kernel helper for result polling
  iio: proximity: rfd77402: Align polling timeout with datasheet
  iio: cros_ec: Allow enabling/disabling calibration mode
  iio: frequency: ad9523: correct kernel-doc bad line warning
  iio: buffer: buffer_impl.h: fix kernel-doc warnings
  iio: gyro: itg3200: Fix unchecked return value in read_raw
  MAINTAINERS: add entry for ADE9000 driver
  iio: accel: sca3000: remove unused last_timestamp field
  iio: accel: adxl372: remove unused int2_bitmask field
  iio: adc: ad7766: Use iio_trigger_generic_data_rdy_poll()
  iio: magnetometer: Remove IRQF_ONESHOT
  ...
 2026-02-17 09:11:04 -08:00
Linus Torvalds
26a4cfaff8 A handful of small, late-arriving documentation fixes. 
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Merge tag 'docs-7.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/docs/linux

Pull documentation fixes from Jonathan Corbet:
 "A handful of small, late-arriving documentation fixes"

* tag 'docs-7.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/docs/linux:
  docs: toshiba_haps: fix grammar error in SSD warning
  Docs/mm: fix typos and grammar in page_tables.rst
  Docs/core-api: fix typos in rbtree.rst
  docs: clarify wording in programming-language.rst
  docs: process: maintainer-pgp-guide: update kernel.org docs link
  docs: kdoc_parser: allow __exit in function prototypes
 2026-02-15 10:47:59 -08:00
Linus Torvalds
64275e9fda LoongArch changes for v7.0 
1, Select HAVE_CMPXCHG_{LOCAL,DOUBLE};
 2, Add 128-bit atomic cmpxchg support;
 3, Add HOTPLUG_SMT implementation;
 4, Wire up memfd_secret system call;
 5, Fix boot errors and unwind errors for KASAN;
 6, Use BPF prog pack allocator and add BPF arena support;
 7, Update dts files to add nand controllers;
 8, Some bug fixes and other small changes.
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Merge tag 'loongarch-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson

Pull LoongArch updates from Huacai Chen:
 - Select HAVE_CMPXCHG_{LOCAL,DOUBLE}
 - Add 128-bit atomic cmpxchg support
 - Add HOTPLUG_SMT implementation
 - Wire up memfd_secret system call
 - Fix boot errors and unwind errors for KASAN
 - Use BPF prog pack allocator and add BPF arena support
 - Update dts files to add nand controllers
 - Some bug fixes and other small changes

* tag 'loongarch-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
  LoongArch: dts: loongson-2k1000: Add nand controller support
  LoongArch: dts: loongson-2k0500: Add nand controller support
  LoongArch: BPF: Implement bpf_addr_space_cast instruction
  LoongArch: BPF: Implement PROBE_MEM32 pseudo instructions
  LoongArch: BPF: Use BPF prog pack allocator
  LoongArch: Use IS_ERR_PCPU() macro for KGDB
  LoongArch: Rework KASAN initialization for PTW-enabled systems
  LoongArch: Disable instrumentation for setup_ptwalker()
  LoongArch: Remove some extern variables in source files
  LoongArch: Guard percpu handler under !CONFIG_PREEMPT_RT
  LoongArch: Handle percpu handler address for ORC unwinder
  LoongArch: Use %px to print unmodified unwinding address
  LoongArch: Prefer top-down allocation after arch_mem_init()
  LoongArch: Add HOTPLUG_SMT implementation
  LoongArch: Make cpumask_of_node() robust against NUMA_NO_NODE
  LoongArch: Wire up memfd_secret system call
  LoongArch: Replace seq_printf() with seq_puts() for simple strings
  LoongArch: Add 128-bit atomic cmpxchg support
  LoongArch: Add detection for SC.Q support
  LoongArch: Select HAVE_CMPXCHG_LOCAL in Kconfig
 2026-02-14 12:47:15 -08:00
Berke Antar
e1e828a1e9 docs: toshiba_haps: fix grammar error in SSD warning 
Replace "make this driver to fail" with "cause this driver to fail"
to correct the grammar.

Signed-off-by: Berke Antar <b@berkeantar.com>
Message-ID: <b9085090-e70f-46ac-aad0-96da1fc7cdcc@smtp-relay.sendinblue.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
 2026-02-14 10:17:20 -07:00
Linus Torvalds
770aaedb46 Bootconfig for v7.0 
- Update the bootconfig parser to stop searching for a value when it
   encounters a newline character.
   Note that this changes the bootconfig formatting but this should not
   fall under the don't break user space rule as users of bootconfig is
   for booting the kernel and not about applications running in the
   kernel's user space.
 
 - Update the tests for bootconfig parser to ensure the good examples
   to be parsed correctly by comparing the expected results.
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Merge tag 'bootconfig-v7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull bootconfig updates from Masami Hiramatsu:

 - Update the bootconfig parser to stop searching for a value when it
   encounters a newline character

 - Update the tests for bootconfig parser to ensure the good examples to
   be parsed correctly by comparing the expected results

* tag 'bootconfig-v7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  bootconfig: Check the parsed output of the good examples
  bootconfig: Terminate value search if it hits a newline
 2026-02-13 19:33:39 -08:00
Linus Torvalds
f50822fd86 platform-drivers-x86 for v7.0-1 
Highlights:
 
 - amd/pmf:
   - Avoid overwriting BIOS input values when events occur rapidly
   - Fix PMF driver issues related to S4 (in part on crypto/ccp side)
   - Add NPU metrics API (for accel side consumers)
   - Allow disabling Smart PC function through a module parameter
 
 - asus-wmi & HID/asus:
   - Unification of backlight control (replaces quirks)
   - Support multiple interfaces for controlling keyboard/RGB brightness
   - Simplify init sequence
 
 - hp-wmi:
   - Add manual fan control for Victus S models
   - Add fan mode keep-alive
   - Fix platform profile values for Omen 16-wf1xxx
   - Add EC offset to get the thermal profile
 
 - intel/pmc: Show substate residencies also for non-primary PMCs
 
 - intel/ISST:
   - Store and restore data for all domains
   - Write interface improvements
 
 - lenovo-wmi:
   - Support multiple Capability Data
   - Add HWMON reporting and tuning support
 
 - mellanox/mlx-platform: Add HI173 & HI174 support
 
 - surface/aggregator_registry: Add Surface Pro 11 (QCOM)
 
 - thinkpad_acpi: Add support for HW damage detection capability
 
 - uniwill: Implement cTGP setting
 
 - wmi:
   - Introduce marshalling support
   - Convert a few drivers to use the new buffer-based WMI API
 
 - tools/power/x86/intel-speed-select: Allow read operations for non-root
 
 - Miscellaneous cleanups / refactoring / improvements
 
 The following is an automated shortlog grouped by driver:
 
 amd/pmf:
  -  Added a module parameter to disable the Smart PC function
  -  Introduce new interface to export NPU metrics
  -  Prevent TEE errors after hibernate
  -  Use ring buffer to store custom BIOS input values
 
 amd:
  -  Use scope-based cleanup for wbrf_record()
 
 asus-wmi:
  -  add keyboard brightness event handler
  -  Add support for multiple kbd led handlers
  -  remove unused keyboard backlight quirk
 
 crypto:
  -  ccp - Add an S4 restore flow
  -  ccp - Declare PSP dead if PSP_CMD_TEE_RING_INIT fails
  -  ccp - Factor out ring destroy handling to a helper
  -  ccp - Send PSP_CMD_TEE_RING_DESTROY when PSP_CMD_TEE_RING_INIT fails
 
 HID: asus:
  -  add support for the asus-wmi brightness handler
  -  early return for ROG devices
  -  fortify keyboard handshake
  -  initialize additional endpoints only for certain devices
  -  listen to the asus-wmi brightness device instead of creating one
  -  move vendor initialization to probe
  -  simplify RGB init sequence
  -  use same report_id in response
 
 hp-wmi:
  -  Add EC offsets to read Victus S thermal profile
  -  add manual fan control for Victus S models
  -  fix platform profile values for Omen 16-wf1xxx
  -  implement fan keep-alive
  -  order include headers
 
 ideadpad-laptop:
  -  Clean up style warnings and checks
 
 intel/pmc:
  -  Change LPM mode fields to u8
  -  Enable substate residencies for multiple PMCs
  -  Move LPM mode attributes to PMC
  -  Remove double empty line
 
 intel/pmt:
  -  Replace sprintf() with sysfs_emit()
 
 intel/uncore-freq:
  -  Replace sprintf() with scnprintf()
  -  Replace sprintf() with sysfs_emit()
 
 intel-wmi-sbl-fw-update:
  -  Use new buffer-based WMI API
 
 intel/wmi: thunderbolt:
  -  Use new buffer-based WMI API
 
 ISST:
  -  Add missing write block check
  -  Check for admin capability for write commands
  -  Optimize suspend/resume callbacks
  -  Store and restore all domains data
 
 lenovo-wmi-capdata:
  -  Add support for Capability Data 00
  -  Add support for Fan Test Data
 
 lenovo-wmi-{capdata,other}:
  -  Fix HWMON channel visibility
  -  Support multiple Capability Data
 
 lenovo-wmi-capdata:
  -  Wire up Fan Test Data
 
 lenovo-wmi-helpers:
  -  Convert returned buffer into u32
 
 lenovo-wmi-other:
  -  Add HWMON for fan reporting/tuning
 
 mlx-platform:
  -  Add support DGX flavor of next-generation 800GB/s ethernet switch.
  -  Add support for new Nvidia DGX system based on class VMOD0010
 
 Rename lenovo-wmi-capdata01 to lenovo-wmi-capdata:
  - Rename lenovo-wmi-capdata01 to lenovo-wmi-capdata
 
 surface: aggregator_registry:
  -  Add Surface Pro 11 (QCOM)
 
 surface:
  -  Replace deprecated strcpy() in surface_button_add()
 
 thinkpad_acpi:
  -  Add support to detect hardware damage detection capability.
  -  Add sysfs to display details of damaged device.
 
 tools/power/x86/intel-speed-select:
  -  Allow non root users
  -  Fix file descriptor leak in isolate_cpus()
  -  Use pkg-config for libnl-3.0 detection
  -  v1.25 release
 
 uniwill:
  -  Implement cTGP setting
 
 uniwill-laptop:
  -  Introduce device descriptor system
 
 wmi:
  -  Add helper functions for WMI string conversions
  -  Add kunit test for the marshalling code
  -  Add kunit test for the string conversion code
 
 wmi-bmof:
  -  Use new buffer-based WMI API
 
 wmi:
  -  Introduce marshalling support
 
 wmi: string-kunit:
  -  Add missing oversized string test case
 
 wmi:
  -  Update driver development guide
 
 xiaomi-wmi:
  -  Use new buffer-based WMI API
 
 yogabook:
  -  Clean up code style
 
 Merges:
  -  Merge branch 'fixes' of into for-next
  -  Merge branch 'intel-sst' of https://github.com/spandruvada/linux-kernel into for-next
  -  Merge branch 'platform-drivers-x86-asus-kbd' into for-next
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Merge tag 'platform-drivers-x86-v7.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

Pull x86 platform driver updates from Ilpo Järvinen:
 "Highlights:

   - amd/pmf:
      - Avoid overwriting BIOS input values when events occur rapidly
      - Fix PMF driver issues related to S4 (in part on crypto/ccp side)
      - Add NPU metrics API (for accel side consumers)
      - Allow disabling Smart PC function through a module parameter

   - asus-wmi & HID/asus:
      - Unification of backlight control (replaces quirks)
      - Support multiple interfaces for controlling keyboard/RGB brightness
      - Simplify init sequence

   - hp-wmi:
      - Add manual fan control for Victus S models
      - Add fan mode keep-alive
      - Fix platform profile values for Omen 16-wf1xxx
      - Add EC offset to get the thermal profile

   - intel/pmc: Show substate residencies also for non-primary PMCs

   - intel/ISST:
      - Store and restore data for all domains
      - Write interface improvements

   - lenovo-wmi:
      - Support multiple Capability Data
      - Add HWMON reporting and tuning support

   - mellanox/mlx-platform: Add HI173 & HI174 support

   - surface/aggregator_registry: Add Surface Pro 11 (QCOM)

   - thinkpad_acpi: Add support for HW damage detection capability

   - uniwill: Implement cTGP setting

   - wmi:
      - Introduce marshalling support
      - Convert a few drivers to use the new buffer-based WMI API

   - tools/power/x86/intel-speed-select: Allow read operations for non-root

   - Miscellaneous cleanups / refactoring / improvements"

* tag 'platform-drivers-x86-v7.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (68 commits)
  platform/x86: lenovo-wmi-{capdata,other}: Fix HWMON channel visibility
  platform/x86: hp-wmi: Add EC offsets to read Victus S thermal profile
  platform: mellanox: mlx-platform: Add support DGX flavor of next-generation 800GB/s ethernet switch.
  platform: mellanox: mlx-platform: Add support for new Nvidia DGX system based on class VMOD0010
  HID: asus: add support for the asus-wmi brightness handler
  platform/x86: asus-wmi: add keyboard brightness event handler
  platform/x86: asus-wmi: remove unused keyboard backlight quirk
  HID: asus: listen to the asus-wmi brightness device instead of creating one
  platform/x86: asus-wmi: Add support for multiple kbd led handlers
  HID: asus: early return for ROG devices
  HID: asus: move vendor initialization to probe
  HID: asus: fortify keyboard handshake
  HID: asus: use same report_id in response
  HID: asus: initialize additional endpoints only for certain devices
  HID: asus: simplify RGB init sequence
  platform/wmi: string-kunit: Add missing oversized string test case
  platform/x86/amd/pmf: Added a module parameter to disable the Smart PC function
  platform/x86/uniwill: Implement cTGP setting
  platform/x86: uniwill-laptop: Introduce device descriptor system
  platform/x86/amd: Use scope-based cleanup for wbrf_record()
  ...
 2026-02-13 15:39:15 -08:00
Linus Torvalds
cb5573868e Loongarch: 
- Add more CPUCFG mask bits.
 
 - Improve feature detection.
 
 - Add lazy load support for FPU and binary translation (LBT) register state.
 
 - Fix return value for memory reads from and writes to in-kernel devices.
 
 - Add support for detecting preemption from within a guest.
 
 - Add KVM steal time test case to tools/selftests.
 
 ARM:
 
 - Add support for FEAT_IDST, allowing ID registers that are not
   implemented to be reported as a normal trap rather than as an UNDEF
   exception.
 
 - Add sanitisation of the VTCR_EL2 register, fixing a number of
   UXN/PXN/XN bugs in the process.
 
 - Full handling of RESx bits, instead of only RES0, and resulting in
   SCTLR_EL2 being added to the list of sanitised registers.
 
 - More pKVM fixes for features that are not supposed to be exposed to
   guests.
 
 - Make sure that MTE being disabled on the pKVM host doesn't give it
   the ability to attack the hypervisor.
 
 - Allow pKVM's host stage-2 mappings to use the Force Write Back
   version of the memory attributes by using the "pass-through'
   encoding.
 
 - Fix trapping of ICC_DIR_EL1 on GICv5 hosts emulating GICv3 for the
   guest.
 
 - Preliminary work for guest GICv5 support.
 
 - A bunch of debugfs fixes, removing pointless custom iterators stored
   in guest data structures.
 
 - A small set of FPSIMD cleanups.
 
 - Selftest fixes addressing the incorrect alignment of page
   allocation.
 
 - Other assorted low-impact fixes and spelling fixes.
 
 RISC-V:
 
 - Fixes for issues discoverd by KVM API fuzzing in
   kvm_riscv_aia_imsic_has_attr(), kvm_riscv_aia_imsic_rw_attr(),
   and kvm_riscv_vcpu_aia_imsic_update()
 
 - Allow Zalasr, Zilsd and Zclsd extensions for Guest/VM
 
 - Transparent huge page support for hypervisor page tables
 
 - Adjust the number of available guest irq files based on MMIO
   register sizes found in the device tree or the ACPI tables
 
 - Add RISC-V specific paging modes to KVM selftests
 
 - Detect paging mode at runtime for selftests
 
 s390:
 
 - Performance improvement for vSIE (aka nested virtualization)
 
 - Completely new memory management.  s390 was a special snowflake that enlisted
   help from the architecture's page table management to build hypervisor
   page tables, in particular enabling sharing the last level of page
   tables.  This however was a lot of code (~3K lines) in order to support
   KVM, and also blocked several features.  The biggest advantages is
   that the page size of userspace is completely independent of the
   page size used by the guest: userspace can mix normal pages, THPs and
   hugetlbfs as it sees fit, and in fact transparent hugepages were not
   possible before.  It's also now possible to have nested guests and
   guests with huge pages running on the same host.
 
 - Maintainership change for s390 vfio-pci
 
 - Small quality of life improvement for protected guests
 
 x86:
 
 - Add support for giving the guest full ownership of PMU hardware (contexted
   switched around the fastpath run loop) and allowing direct access to data
   MSRs and PMCs (restricted by the vPMU model).  KVM still intercepts
   access to control registers, e.g. to enforce event filtering and to
   prevent the guest from profiling sensitive host state.  This is more
   accurate, since it has no risk of contention and thus dropped events, and
   also has significantly less overhead.
 
   For more information, see the commit message for merge commit bf2c3138ae
   ("Merge tag 'kvm-x86-pmu-6.20' of https://github.com/kvm-x86/linux into HEAD").
 
 - Disallow changing the virtual CPU model if L2 is active, for all the same
   reasons KVM disallows change the model after the first KVM_RUN.
 
 - Fix a bug where KVM would incorrectly reject host accesses to PV MSRs
   when running with KVM_CAP_ENFORCE_PV_FEATURE_CPUID enabled, even if those
   were advertised as supported to userspace,
 
 - Fix a bug with protected guest state (SEV-ES/SNP and TDX) VMs, where KVM
   would attempt to read CR3 configuring an async #PF entry.
 
 - Fail the build if EXPORT_SYMBOL_GPL or EXPORT_SYMBOL is used in KVM (for x86
   only) to enforce usage of EXPORT_SYMBOL_FOR_KVM_INTERNAL.  Only a few exports
   that are intended for external usage, and those are allowed explicitly.
 
 - When checking nested events after a vCPU is unblocked, ignore -EBUSY instead
   of WARNing.  Userspace can sometimes put the vCPU into what should be an
   impossible state, and spurious exit to userspace on -EBUSY does not really
   do anything to solve the issue.
 
 - Also throw in the towel and drop the WARN on INIT/SIPI being blocked when vCPU
   is in Wait-For-SIPI, which also resulted in playing whack-a-mole with syzkaller
   stuffing architecturally impossible states into KVM.
 
 - Add support for new Intel instructions that don't require anything beyond
   enumerating feature flags to userspace.
 
 - Grab SRCU when reading PDPTRs in KVM_GET_SREGS2.
 
 - Add WARNs to guard against modifying KVM's CPU caps outside of the intended
   setup flow, as nested VMX in particular is sensitive to unexpected changes
   in KVM's golden configuration.
 
 - Add a quirk to allow userspace to opt-in to actually suppress EOI broadcasts
   when the suppression feature is enabled by the guest (currently limited to
   split IRQCHIP, i.e. userspace I/O APIC).  Sadly, simply fixing KVM to honor
   Suppress EOI Broadcasts isn't an option as some userspaces have come to rely
   on KVM's buggy behavior (KVM advertises Supress EOI Broadcast irrespective
   of whether or not userspace I/O APIC supports Directed EOIs).
 
 - Clean up KVM's handling of marking mapped vCPU pages dirty.
 
 - Drop a pile of *ancient* sanity checks hidden behind in KVM's unused
   ASSERT() macro, most of which could be trivially triggered by the guest
   and/or user, and all of which were useless.
 
 - Fold "struct dest_map" into its sole user, "struct rtc_status", to make it
   more obvious what the weird parameter is used for, and to allow fropping
   these RTC shenanigans if CONFIG_KVM_IOAPIC=n.
 
 - Bury all of ioapic.h, i8254.h and related ioctls (including
   KVM_CREATE_IRQCHIP) behind CONFIG_KVM_IOAPIC=y.
 
 - Add a regression test for recent APICv update fixes.
 
 - Handle "hardware APIC ISR", a.k.a. SVI, updates in kvm_apic_update_apicv()
   to consolidate the updates, and to co-locate SVI updates with the updates
   for KVM's own cache of ISR information.
 
 - Drop a dead function declaration.
 
 - Minor cleanups.
 
 x86 (Intel):
 
 - Rework KVM's handling of VMCS updates while L2 is active to temporarily
   switch to vmcs01 instead of deferring the update until the next nested
   VM-Exit.  The deferred updates approach directly contributed to several
   bugs, was proving to be a maintenance burden due to the difficulty in
   auditing the correctness of deferred updates, and was polluting
   "struct nested_vmx" with a growing pile of booleans.
 
 - Fix an SGX bug where KVM would incorrectly try to handle EPCM page faults,
   and instead always reflect them into the guest.  Since KVM doesn't shadow
   EPCM entries, EPCM violations cannot be due to KVM interference and
   can't be resolved by KVM.
 
 - Fix a bug where KVM would register its posted interrupt wakeup handler even
   if loading kvm-intel.ko ultimately failed.
 
 - Disallow access to vmcb12 fields that aren't fully supported, mostly to
   avoid weirdness and complexity for FRED and other features, where KVM wants
   enable VMCS shadowing for fields that conditionally exist.
 
 - Print out the "bad" offsets and values if kvm-intel.ko refuses to load (or
   refuses to online a CPU) due to a VMCS config mismatch.
 
 x86 (AMD):
 
 - Drop a user-triggerable WARN on nested_svm_load_cr3() failure.
 
 - Add support for virtualizing ERAPS.  Note, correct virtualization of ERAPS
   relies on an upcoming, publicly announced change in the APM to reduce the
   set of conditions where hardware (i.e. KVM) *must* flush the RAP.
 
 - Ignore nSVM intercepts for instructions that are not supported according to
   L1's virtual CPU model.
 
 - Add support for expedited writes to the fast MMIO bus, a la VMX's fastpath
   for EPT Misconfig.
 
 - Don't set GIF when clearing EFER.SVME, as GIF exists independently of SVM,
   and allow userspace to restore nested state with GIF=0.
 
 - Treat exit_code as an unsigned 64-bit value through all of KVM.
 
 - Add support for fetching SNP certificates from userspace.
 
 - Fix a bug where KVM would use vmcb02 instead of vmcb01 when emulating VMLOAD
   or VMSAVE on behalf of L2.
 
 - Misc fixes and cleanups.
 
 x86 selftests:
 
 - Add a regression test for TPR<=>CR8 synchronization and IRQ masking.
 
 - Overhaul selftest's MMU infrastructure to genericize stage-2 MMU support,
   and extend x86's infrastructure to support EPT and NPT (for L2 guests).
 
 - Extend several nested VMX tests to also cover nested SVM.
 
 - Add a selftest for nested VMLOAD/VMSAVE.
 
 - Rework the nested dirty log test, originally added as a regression test for
   PML where KVM logged L2 GPAs instead of L1 GPAs, to improve test coverage
   and to hopefully make the test easier to understand and maintain.
 
 guest_memfd:
 
 - Remove kvm_gmem_populate()'s preparation tracking and half-baked hugepage
   handling.  SEV/SNP was the only user of the tracking and it can do it via
   the RMP.
 
 - Retroactively document and enforce (for SNP) that KVM_SEV_SNP_LAUNCH_UPDATE
   and KVM_TDX_INIT_MEM_REGION require the source page to be 4KiB aligned, to
   avoid non-trivial complexity for something that no known VMM seems to be
   doing and to avoid an API special case for in-place conversion, which
   simply can't support unaligned sources.
 
 - When populating guest_memfd memory, GUP the source page in common code and
   pass the refcounted page to the vendor callback, instead of letting vendor
   code do the heavy lifting.  Doing so avoids a looming deadlock bug with
   in-place due an AB-BA conflict betwee mmap_lock and guest_memfd's filemap
   invalidate lock.
 
 Generic:
 
 - Fix a bug where KVM would ignore the vCPU's selected address space when
   creating a vCPU-specific mapping of guest memory.  Actually this bug
   could not be hit even on x86, the only architecture with multiple
   address spaces, but it's a bug nevertheless.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM updates from Paolo Bonzini:
 "Loongarch:

   - Add more CPUCFG mask bits

   - Improve feature detection

   - Add lazy load support for FPU and binary translation (LBT) register
     state

   - Fix return value for memory reads from and writes to in-kernel
     devices

   - Add support for detecting preemption from within a guest

   - Add KVM steal time test case to tools/selftests

  ARM:

   - Add support for FEAT_IDST, allowing ID registers that are not
     implemented to be reported as a normal trap rather than as an UNDEF
     exception

   - Add sanitisation of the VTCR_EL2 register, fixing a number of
     UXN/PXN/XN bugs in the process

   - Full handling of RESx bits, instead of only RES0, and resulting in
     SCTLR_EL2 being added to the list of sanitised registers

   - More pKVM fixes for features that are not supposed to be exposed to
     guests

   - Make sure that MTE being disabled on the pKVM host doesn't give it
     the ability to attack the hypervisor

   - Allow pKVM's host stage-2 mappings to use the Force Write Back
     version of the memory attributes by using the "pass-through'
     encoding

   - Fix trapping of ICC_DIR_EL1 on GICv5 hosts emulating GICv3 for the
     guest

   - Preliminary work for guest GICv5 support

   - A bunch of debugfs fixes, removing pointless custom iterators
     stored in guest data structures

   - A small set of FPSIMD cleanups

   - Selftest fixes addressing the incorrect alignment of page
     allocation

   - Other assorted low-impact fixes and spelling fixes

  RISC-V:

   - Fixes for issues discoverd by KVM API fuzzing in
     kvm_riscv_aia_imsic_has_attr(), kvm_riscv_aia_imsic_rw_attr(), and
     kvm_riscv_vcpu_aia_imsic_update()

   - Allow Zalasr, Zilsd and Zclsd extensions for Guest/VM

   - Transparent huge page support for hypervisor page tables

   - Adjust the number of available guest irq files based on MMIO
     register sizes found in the device tree or the ACPI tables

   - Add RISC-V specific paging modes to KVM selftests

   - Detect paging mode at runtime for selftests

  s390:

   - Performance improvement for vSIE (aka nested virtualization)

   - Completely new memory management. s390 was a special snowflake that
     enlisted help from the architecture's page table management to
     build hypervisor page tables, in particular enabling sharing the
     last level of page tables. This however was a lot of code (~3K
     lines) in order to support KVM, and also blocked several features.
     The biggest advantages is that the page size of userspace is
     completely independent of the page size used by the guest:
     userspace can mix normal pages, THPs and hugetlbfs as it sees fit,
     and in fact transparent hugepages were not possible before. It's
     also now possible to have nested guests and guests with huge pages
     running on the same host

   - Maintainership change for s390 vfio-pci

   - Small quality of life improvement for protected guests

  x86:

   - Add support for giving the guest full ownership of PMU hardware
     (contexted switched around the fastpath run loop) and allowing
     direct access to data MSRs and PMCs (restricted by the vPMU model).

     KVM still intercepts access to control registers, e.g. to enforce
     event filtering and to prevent the guest from profiling sensitive
     host state. This is more accurate, since it has no risk of
     contention and thus dropped events, and also has significantly less
     overhead.

     For more information, see the commit message for merge commit
     bf2c3138ae ("Merge tag 'kvm-x86-pmu-6.20' ...")

   - Disallow changing the virtual CPU model if L2 is active, for all
     the same reasons KVM disallows change the model after the first
     KVM_RUN

   - Fix a bug where KVM would incorrectly reject host accesses to PV
     MSRs when running with KVM_CAP_ENFORCE_PV_FEATURE_CPUID enabled,
     even if those were advertised as supported to userspace,

   - Fix a bug with protected guest state (SEV-ES/SNP and TDX) VMs,
     where KVM would attempt to read CR3 configuring an async #PF entry

   - Fail the build if EXPORT_SYMBOL_GPL or EXPORT_SYMBOL is used in KVM
     (for x86 only) to enforce usage of EXPORT_SYMBOL_FOR_KVM_INTERNAL.
     Only a few exports that are intended for external usage, and those
     are allowed explicitly

   - When checking nested events after a vCPU is unblocked, ignore
     -EBUSY instead of WARNing. Userspace can sometimes put the vCPU
     into what should be an impossible state, and spurious exit to
     userspace on -EBUSY does not really do anything to solve the issue

   - Also throw in the towel and drop the WARN on INIT/SIPI being
     blocked when vCPU is in Wait-For-SIPI, which also resulted in
     playing whack-a-mole with syzkaller stuffing architecturally
     impossible states into KVM

   - Add support for new Intel instructions that don't require anything
     beyond enumerating feature flags to userspace

   - Grab SRCU when reading PDPTRs in KVM_GET_SREGS2

   - Add WARNs to guard against modifying KVM's CPU caps outside of the
     intended setup flow, as nested VMX in particular is sensitive to
     unexpected changes in KVM's golden configuration

   - Add a quirk to allow userspace to opt-in to actually suppress EOI
     broadcasts when the suppression feature is enabled by the guest
     (currently limited to split IRQCHIP, i.e. userspace I/O APIC).
     Sadly, simply fixing KVM to honor Suppress EOI Broadcasts isn't an
     option as some userspaces have come to rely on KVM's buggy behavior
     (KVM advertises Supress EOI Broadcast irrespective of whether or
     not userspace I/O APIC supports Directed EOIs)

   - Clean up KVM's handling of marking mapped vCPU pages dirty

   - Drop a pile of *ancient* sanity checks hidden behind in KVM's
     unused ASSERT() macro, most of which could be trivially triggered
     by the guest and/or user, and all of which were useless

   - Fold "struct dest_map" into its sole user, "struct rtc_status", to
     make it more obvious what the weird parameter is used for, and to
     allow fropping these RTC shenanigans if CONFIG_KVM_IOAPIC=n

   - Bury all of ioapic.h, i8254.h and related ioctls (including
     KVM_CREATE_IRQCHIP) behind CONFIG_KVM_IOAPIC=y

   - Add a regression test for recent APICv update fixes

   - Handle "hardware APIC ISR", a.k.a. SVI, updates in
     kvm_apic_update_apicv() to consolidate the updates, and to
     co-locate SVI updates with the updates for KVM's own cache of ISR
     information

   - Drop a dead function declaration

   - Minor cleanups

  x86 (Intel):

   - Rework KVM's handling of VMCS updates while L2 is active to
     temporarily switch to vmcs01 instead of deferring the update until
     the next nested VM-Exit.

     The deferred updates approach directly contributed to several bugs,
     was proving to be a maintenance burden due to the difficulty in
     auditing the correctness of deferred updates, and was polluting
     "struct nested_vmx" with a growing pile of booleans

   - Fix an SGX bug where KVM would incorrectly try to handle EPCM page
     faults, and instead always reflect them into the guest. Since KVM
     doesn't shadow EPCM entries, EPCM violations cannot be due to KVM
     interference and can't be resolved by KVM

   - Fix a bug where KVM would register its posted interrupt wakeup
     handler even if loading kvm-intel.ko ultimately failed

   - Disallow access to vmcb12 fields that aren't fully supported,
     mostly to avoid weirdness and complexity for FRED and other
     features, where KVM wants enable VMCS shadowing for fields that
     conditionally exist

   - Print out the "bad" offsets and values if kvm-intel.ko refuses to
     load (or refuses to online a CPU) due to a VMCS config mismatch

  x86 (AMD):

   - Drop a user-triggerable WARN on nested_svm_load_cr3() failure

   - Add support for virtualizing ERAPS. Note, correct virtualization of
     ERAPS relies on an upcoming, publicly announced change in the APM
     to reduce the set of conditions where hardware (i.e. KVM) *must*
     flush the RAP

   - Ignore nSVM intercepts for instructions that are not supported
     according to L1's virtual CPU model

   - Add support for expedited writes to the fast MMIO bus, a la VMX's
     fastpath for EPT Misconfig

   - Don't set GIF when clearing EFER.SVME, as GIF exists independently
     of SVM, and allow userspace to restore nested state with GIF=0

   - Treat exit_code as an unsigned 64-bit value through all of KVM

   - Add support for fetching SNP certificates from userspace

   - Fix a bug where KVM would use vmcb02 instead of vmcb01 when
     emulating VMLOAD or VMSAVE on behalf of L2

   - Misc fixes and cleanups

  x86 selftests:

   - Add a regression test for TPR<=>CR8 synchronization and IRQ masking

   - Overhaul selftest's MMU infrastructure to genericize stage-2 MMU
     support, and extend x86's infrastructure to support EPT and NPT
     (for L2 guests)

   - Extend several nested VMX tests to also cover nested SVM

   - Add a selftest for nested VMLOAD/VMSAVE

   - Rework the nested dirty log test, originally added as a regression
     test for PML where KVM logged L2 GPAs instead of L1 GPAs, to
     improve test coverage and to hopefully make the test easier to
     understand and maintain

  guest_memfd:

   - Remove kvm_gmem_populate()'s preparation tracking and half-baked
     hugepage handling. SEV/SNP was the only user of the tracking and it
     can do it via the RMP

   - Retroactively document and enforce (for SNP) that
     KVM_SEV_SNP_LAUNCH_UPDATE and KVM_TDX_INIT_MEM_REGION require the
     source page to be 4KiB aligned, to avoid non-trivial complexity for
     something that no known VMM seems to be doing and to avoid an API
     special case for in-place conversion, which simply can't support
     unaligned sources

   - When populating guest_memfd memory, GUP the source page in common
     code and pass the refcounted page to the vendor callback, instead
     of letting vendor code do the heavy lifting. Doing so avoids a
     looming deadlock bug with in-place due an AB-BA conflict betwee
     mmap_lock and guest_memfd's filemap invalidate lock

  Generic:

   - Fix a bug where KVM would ignore the vCPU's selected address space
     when creating a vCPU-specific mapping of guest memory. Actually
     this bug could not be hit even on x86, the only architecture with
     multiple address spaces, but it's a bug nevertheless"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (267 commits)
  KVM: s390: Increase permitted SE header size to 1 MiB
  MAINTAINERS: Replace backup for s390 vfio-pci
  KVM: s390: vsie: Fix race in acquire_gmap_shadow()
  KVM: s390: vsie: Fix race in walk_guest_tables()
  KVM: s390: Use guest address to mark guest page dirty
  irqchip/riscv-imsic: Adjust the number of available guest irq files
  RISC-V: KVM: Transparent huge page support
  RISC-V: KVM: selftests: Add Zalasr extensions to get-reg-list test
  RISC-V: KVM: Allow Zalasr extensions for Guest/VM
  KVM: riscv: selftests: Add riscv vm satp modes
  KVM: riscv: selftests: add Zilsd and Zclsd extension to get-reg-list test
  riscv: KVM: allow Zilsd and Zclsd extensions for Guest/VM
  RISC-V: KVM: Skip IMSIC update if vCPU IMSIC state is not initialized
  RISC-V: KVM: Fix null pointer dereference in kvm_riscv_aia_imsic_rw_attr()
  RISC-V: KVM: Fix null pointer dereference in kvm_riscv_aia_imsic_has_attr()
  RISC-V: KVM: Remove unnecessary 'ret' assignment
  KVM: s390: Add explicit padding to struct kvm_s390_keyop
  KVM: LoongArch: selftests: Add steal time test case
  LoongArch: KVM: Add paravirt vcpu_is_preempted() support in guest side
  LoongArch: KVM: Add paravirt preempt feature in hypervisor side
  ...
 2026-02-13 11:31:15 -08:00
Linus Torvalds
cee73b1e84 RISC-V updates for v7.0 
- Add support for control flow integrity for userspace processes.
   This is based on the standard RISC-V ISA extensions Zicfiss and
   Zicfilp
 
 - Improve ptrace behavior regarding vector registers, and add some selftests
 
 - Optimize our strlen() assembly
 
 - Enable the ISO-8859-1 code page as built-in, similar to ARM64, for EFI
   volume mounting
 
 - Clean up some code slightly, including defining copy_user_page() as
   copy_page() rather than memcpy(), aligning us with other
   architectures; and using max3() to slightly simplify an expression
   in riscv_iommu_init_check()
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Merge tag 'riscv-for-linus-7.0-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V updates from Paul Walmsley:

 - Add support for control flow integrity for userspace processes.

   This is based on the standard RISC-V ISA extensions Zicfiss and
   Zicfilp

 - Improve ptrace behavior regarding vector registers, and add some
   selftests

 - Optimize our strlen() assembly

 - Enable the ISO-8859-1 code page as built-in, similar to ARM64, for
   EFI volume mounting

 - Clean up some code slightly, including defining copy_user_page() as
   copy_page() rather than memcpy(), aligning us with other
   architectures; and using max3() to slightly simplify an expression
   in riscv_iommu_init_check()

* tag 'riscv-for-linus-7.0-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (42 commits)
  riscv: lib: optimize strlen loop efficiency
  selftests: riscv: vstate_exec_nolibc: Use the regular prctl() function
  selftests: riscv: verify ptrace accepts valid vector csr values
  selftests: riscv: verify ptrace rejects invalid vector csr inputs
  selftests: riscv: verify syscalls discard vector context
  selftests: riscv: verify initial vector state with ptrace
  selftests: riscv: test ptrace vector interface
  riscv: ptrace: validate input vector csr registers
  riscv: csr: define vtype register elements
  riscv: vector: init vector context with proper vlenb
  riscv: ptrace: return ENODATA for inactive vector extension
  kselftest/riscv: add kselftest for user mode CFI
  riscv: add documentation for shadow stack
  riscv: add documentation for landing pad / indirect branch tracking
  riscv: create a Kconfig fragment for shadow stack and landing pad support
  arch/riscv: add dual vdso creation logic and select vdso based on hw
  arch/riscv: compile vdso with landing pad and shadow stack note
  riscv: enable kernel access to shadow stack memory via the FWFT SBI call
  riscv: add kernel command line option to opt out of user CFI
  riscv/hwprobe: add zicfilp / zicfiss enumeration in hwprobe
  ...
 2026-02-12 19:17:44 -08:00
Linus Torvalds
2c75a8d92c ATA changes for 6.20 
- Cleanup IRQ masking in the handling of completed report zones
    commands (Niklas).
 
  - Improve the handling of Thunderbolt attached devices to speed up
    device removal (Henry).
 
  - Several patches to generalize the existing max_sec quirks to
    facilitates quirking the maximum command size of buggy drives, many
    of which have recently showed up with the recent increase of the
    default max_sectors block limit (Niklas).
 
  - Cleanup the ahci-platform and sata dt-bindings schema (Rob,
    Manivannan).
 
  - Improve device node scan in the ahci-dwc driver (Krzysztof).
 
  - Remove clang W=1 warnings with the ahci-imx and ahci-xgene drivers
    (Krzysztof).
 
  - Fix a long standing potential command starvation situation with
    non-NCQ commands issued when NCQ commands are on-going (me).
 
  - Limit max_sectors to 8191 on the INTEL SSDSC2KG480G8 SSD (Niklas).
 
  - Remove Vesa Local Bus (VLB) support in the pata_legacy driver
    (Ethan).
 
  - Simple fixes in the pata_cypress (typo) and pata_ftide010 (timing)
    drivers (Ethan, Linus W.)
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Merge tag 'ata-6.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux

Pull ATA updates from Damien Le Moal:

 - Cleanup IRQ masking in the handling of completed report zones
   commands (Niklas)

 - Improve the handling of Thunderbolt attached devices to speed up
   device removal (Henry)

 - Several patches to generalize the existing max_sec quirks to
   facilitates quirking the maximum command size of buggy drives, many
   of which have recently showed up with the recent increase of the
   default max_sectors block limit (Niklas)

 - Cleanup the ahci-platform and sata dt-bindings schema (Rob,
   Manivannan)

 - Improve device node scan in the ahci-dwc driver (Krzysztof)

 - Remove clang W=1 warnings with the ahci-imx and ahci-xgene drivers
   (Krzysztof)

 - Fix a long standing potential command starvation situation with
   non-NCQ commands issued when NCQ commands are on-going (me)

 - Limit max_sectors to 8191 on the INTEL SSDSC2KG480G8 SSD (Niklas)

 - Remove Vesa Local Bus (VLB) support in the pata_legacy driver (Ethan)

 - Simple fixes in the pata_cypress (typo) and pata_ftide010 (timing)
   drivers (Ethan, Linus W)

* tag 'ata-6.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux:
  ata: pata_ftide010: Fix some DMA timings
  ata: pata_cypress: fix typo in error message
  ata: pata_legacy: remove VLB support
  ata: libata-core: Quirk INTEL SSDSC2KG480G8 max_sectors
  dt-bindings: ata: sata: Document the graph port
  ata: libata-scsi: avoid Non-NCQ command starvation
  ata: libata-scsi: refactor ata_scsi_translate()
  ata: ahci-xgene: Fix Wvoid-pointer-to-enum-cast warning
  ata: ahci-imx: Fix Wvoid-pointer-to-enum-cast warning
  ata: ahci-dwc: Simplify with scoped for each OF child loop
  dt-bindings: ata: ahci-platform: Drop unnecessary select schema
  ata: libata: Allow more quirks
  ata: libata: Add libata.force parameter max_sec
  ata: libata: Add support to parse equal sign in libata.force
  ata: libata: Change libata.force to use the generic ATA_QUIRK_MAX_SEC quirk
  ata: libata: Add ata_force_get_fe_for_dev() helper
  ata: libata: Add ATA_QUIRK_MAX_SEC and convert all device quirks
  ata: libata: avoid long timeouts on hot-unplugged SATA DAS
  ata: libata-scsi: Remove superfluous local_irq_save()
 2026-02-12 17:12:43 -08:00
Linus Torvalds
136114e0ab mm.git review status for linus..mm-nonmm-stable 
Total patches:       107
 Reviews/patch:       1.07
 Reviewed rate:       67%
 
 - The 2 patch series "ocfs2: give ocfs2 the ability to reclaim
   suballocator free bg" from Heming Zhao saves disk space by teaching
   ocfs2 to reclaim suballocator block group space.
 
 - The 4 patch series "Add ARRAY_END(), and use it to fix off-by-one
   bugs" from Alejandro Colomar adds the ARRAY_END() macro and uses it in
   various places.
 
 - The 2 patch series "vmcoreinfo: support VMCOREINFO_BYTES larger than
   PAGE_SIZE" from Pnina Feder makes the vmcore code future-safe, if
   VMCOREINFO_BYTES ever exceeds the page size.
 
 - The 7 patch series "kallsyms: Prevent invalid access when showing
   module buildid" from Petr Mladek cleans up kallsyms code related to
   module buildid and fixes an invalid access crash when printing
   backtraces.
 
 - The 3 patch series "Address page fault in
   ima_restore_measurement_list()" from Harshit Mogalapalli fixes a
   kexec-related crash that can occur when booting the second-stage kernel
   on x86.
 
 - The 6 patch series "kho: ABI headers and Documentation updates" from
   Mike Rapoport updates the kexec handover ABI documentation.
 
 - The 4 patch series "Align atomic storage" from Finn Thain adds the
   __aligned attribute to atomic_t and atomic64_t definitions to get
   natural alignment of both types on csky, m68k, microblaze, nios2,
   openrisc and sh.
 
 - The 2 patch series "kho: clean up page initialization logic" from
   Pratyush Yadav simplifies the page initialization logic in
   kho_restore_page().
 
 - The 6 patch series "Unload linux/kernel.h" from Yury Norov moves
   several things out of kernel.h and into more appropriate places.
 
 - The 7 patch series "don't abuse task_struct.group_leader" from Oleg
   Nesterov removes the usage of ->group_leader when it is "obviously
   unnecessary".
 
 - The 5 patch series "list private v2 & luo flb" from Pasha Tatashin
   adds some infrastructure improvements to the live update orchestrator.
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Merge tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:

 - "ocfs2: give ocfs2 the ability to reclaim suballocator free bg" saves
   disk space by teaching ocfs2 to reclaim suballocator block group
   space (Heming Zhao)

 - "Add ARRAY_END(), and use it to fix off-by-one bugs" adds the
   ARRAY_END() macro and uses it in various places (Alejandro Colomar)

 - "vmcoreinfo: support VMCOREINFO_BYTES larger than PAGE_SIZE" makes
   the vmcore code future-safe, if VMCOREINFO_BYTES ever exceeds the
   page size (Pnina Feder)

 - "kallsyms: Prevent invalid access when showing module buildid" cleans
   up kallsyms code related to module buildid and fixes an invalid
   access crash when printing backtraces (Petr Mladek)

 - "Address page fault in ima_restore_measurement_list()" fixes a
   kexec-related crash that can occur when booting the second-stage
   kernel on x86 (Harshit Mogalapalli)

 - "kho: ABI headers and Documentation updates" updates the kexec
   handover ABI documentation (Mike Rapoport)

 - "Align atomic storage" adds the __aligned attribute to atomic_t and
   atomic64_t definitions to get natural alignment of both types on
   csky, m68k, microblaze, nios2, openrisc and sh (Finn Thain)

 - "kho: clean up page initialization logic" simplifies the page
   initialization logic in kho_restore_page() (Pratyush Yadav)

 - "Unload linux/kernel.h" moves several things out of kernel.h and into
   more appropriate places (Yury Norov)

 - "don't abuse task_struct.group_leader" removes the usage of
   ->group_leader when it is "obviously unnecessary" (Oleg Nesterov)

 - "list private v2 & luo flb" adds some infrastructure improvements to
   the live update orchestrator (Pasha Tatashin)

* tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (107 commits)
  watchdog/hardlockup: simplify perf event probe and remove per-cpu dependency
  procfs: fix missing RCU protection when reading real_parent in do_task_stat()
  watchdog/softlockup: fix sample ring index wrap in need_counting_irqs()
  kcsan, compiler_types: avoid duplicate type issues in BPF Type Format
  kho: fix doc for kho_restore_pages()
  tests/liveupdate: add in-kernel liveupdate test
  liveupdate: luo_flb: introduce File-Lifecycle-Bound global state
  liveupdate: luo_file: Use private list
  list: add kunit test for private list primitives
  list: add primitives for private list manipulations
  delayacct: fix uapi timespec64 definition
  panic: add panic_force_cpu= parameter to redirect panic to a specific CPU
  netclassid: use thread_group_leader(p) in update_classid_task()
  RDMA/umem: don't abuse current->group_leader
  drm/pan*: don't abuse current->group_leader
  drm/amd: kill the outdated "Only the pthreads threading model is supported" checks
  drm/amdgpu: don't abuse current->group_leader
  android/binder: use same_thread_group(proc->tsk, current) in binder_mmap()
  android/binder: don't abuse current->group_leader
  kho: skip memoryless NUMA nodes when reserving scratch areas
  ...
 2026-02-12 12:13:01 -08:00
Linus Torvalds
4cff5c05e0 mm.git review status for linus..mm-stable 
Everything:
 
 Total patches:       325
 Reviews/patch:       1.39
 Reviewed rate:       72%
 
 Excluding DAMON:
 
 Total patches:       262
 Reviews/patch:       1.63
 Reviewed rate:       82%
 
 Excluding DAMON and zram:
 
 Total patches:       248
 Reviews/patch:       1.72
 Reviewed rate:       86%
 
 - The 14 patch series "powerpc/64s: do not re-activate batched TLB
   flush" from Alexander Gordeev makes arch_{enter|leave}_lazy_mmu_mode()
   nest properly.
 
   It adds a generic enter/leave layer and switches architectures to use
   it.  Various hacks were removed in the process.
 
 - The 7 patch series "zram: introduce compressed data writeback" from
   Richard Chang and Sergey Senozhatsky implements data compression for
   zram writeback.
 
 - The 8 patch series "mm: folio_zero_user: clear page ranges" from David
   Hildenbrand adds clearing of contiguous page ranges for hugepages.
   Large improvements during demand faulting are demonstrated.
 
 - The 2 patch series "memcg cleanups" from Chen Ridong tideis up some
   memcg code.
 
 - The 12 patch series "mm/damon: introduce {,max_}nr_snapshots and
   tracepoint for damos stats" from SeongJae Park improves DAMOS stat's
   provided information, deterministic control, and readability.
 
 - The 3 patch series "selftests/mm: hugetlb cgroup charging: robustness
   fixes" from Li Wang fixes a few issues in the hugetlb cgroup charging
   selftests.
 
 - The 5 patch series "Fix va_high_addr_switch.sh test failure - again"
   from Chunyu Hu addresses several issues in the va_high_addr_switch test.
 
 - The 5 patch series "mm/damon/tests/core-kunit: extend existing test
   scenarios" from Shu Anzai improves the KUnit test coverage for DAMON.
 
 - The 2 patch series "mm/khugepaged: fix dirty page handling for
   MADV_COLLAPSE" from Shivank Garg fixes a glitch in khugepaged which was
   causing madvise(MADV_COLLAPSE) to transiently return -EAGAIN.
 
 - The 29 patch series "arch, mm: consolidate hugetlb early reservation"
   from Mike Rapoport reworks and consolidates a pile of straggly code
   related to reservation of hugetlb memory from bootmem and creation of
   CMA areas for hugetlb.
 
 - The 9 patch series "mm: clean up anon_vma implementation" from Lorenzo
   Stoakes cleans up the anon_vma implementation in various ways.
 
 - The 3 patch series "tweaks for __alloc_pages_slowpath()" from
   Vlastimil Babka does a little streamlining of the page allocator's
   slowpath code.
 
 - The 8 patch series "memcg: separate private and public ID namespaces"
   from Shakeel Butt cleans up the memcg ID code and prevents the
   internal-only private IDs from being exposed to userspace.
 
 - The 6 patch series "mm: hugetlb: allocate frozen gigantic folio" from
   Kefeng Wang cleans up the allocation of frozen folios and avoids some
   atomic refcount operations.
 
 - The 11 patch series "mm/damon: advance DAMOS-based LRU sorting" from
   SeongJae Park improves DAMOS's movement of memory betewwn the active and
   inactive LRUs and adds auto-tuning of the ratio-based quotas and of
   monitoring intervals.
 
 - The 18 patch series "Support page table check on PowerPC" from Andrew
   Donnellan makes CONFIG_PAGE_TABLE_CHECK_ENFORCED work on powerpc.
 
 - The 3 patch series "nodemask: align nodes_and{,not} with underlying
   bitmap ops" from Yury Norov makes nodes_and() and nodes_andnot()
   propagate the return values from the underlying bit operations, enabling
   some cleanup in calling code.
 
 - The 5 patch series "mm/damon: hide kdamond and kdamond_lock from API
   callers" from SeongJae Park cleans up some DAMON internal interfaces.
 
 - The 4 patch series "mm/khugepaged: cleanups and scan limit fix" from
   Shivank Garg does some cleanup work in khupaged and fixes a scan limit
   accounting issue.
 
 - The 24 patch series "mm: balloon infrastructure cleanups" from David
   Hildenbrand goes to town on the balloon infrastructure and its page
   migration function.  Mainly cleanups, also some locking simplification.
 
 - The 2 patch series "mm/vmscan: add tracepoint and reason for
   kswapd_failures reset" from Jiayuan Chen adds additional tracepoints to
   the page reclaim code.
 
 - The 3 patch series "Replace wq users and add WQ_PERCPU to
   alloc_workqueue() users" from Marco Crivellari is part of Marco's
   kernel-wide migration from the legacy workqueue APIs over to the
   preferred unbound workqueues.
 
 - The 9 patch series "Various mm kselftests improvements/fixes" from
   Kevin Brodsky provides various unrelated improvements/fixes for the mm
   kselftests.
 
 - The 5 patch series "mm: accelerate gigantic folio allocation" from
   Kefeng Wang greatly speeds up gigantic folio allocation, mainly by
   avoiding unnecessary work in pfn_range_valid_contig().
 
 - The 5 patch series "selftests/damon: improve leak detection and wss
   estimation reliability" from SeongJae Park improves the reliability of
   two of the DAMON selftests.
 
 - The 8 patch series "mm/damon: cleanup kdamond, damon_call(), damos
   filter and DAMON_MIN_REGION" from SeongJae Park does some cleanup work
   in the core DAMON code.
 
 - The 8 patch series "Docs/mm/damon: update intro, modules, maintainer
   profile, and misc" from SeongJae Park performs maintenance work on the
   DAMON documentation.
 
 - The 10 patch series "mm: add and use vma_assert_stabilised() helper"
   from Lorenzo Stoakes refactors and cleans up the core VMA code.  The
   main aim here is to be able to use the mmap write lock's lockdep state
   to perform various assertions regarding the locking which the VMA code
   requires.
 
 - The 19 patch series "mm, swap: swap table phase II: unify swapin use"
   from Kairui Song removes some old swap code (swap cache bypassing and
   swap synchronization) which wasn't working very well.  Various other
   cleanups and simplifications were made.  The end result is a 20% speedup
   in one benchmark.
 
 - The 8 patch series "enable PT_RECLAIM on more 64-bit architectures"
   from Qi Zheng makes PT_RECLAIM available on 64-bit alpha, loongarch,
   mips, parisc, um,  Various cleanups were performed along the way.
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Merge tag 'mm-stable-2026-02-11-19-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:

 - "powerpc/64s: do not re-activate batched TLB flush" makes
   arch_{enter|leave}_lazy_mmu_mode() nest properly (Alexander Gordeev)

   It adds a generic enter/leave layer and switches architectures to use
   it. Various hacks were removed in the process.

 - "zram: introduce compressed data writeback" implements data
   compression for zram writeback (Richard Chang and Sergey Senozhatsky)

 - "mm: folio_zero_user: clear page ranges" adds clearing of contiguous
   page ranges for hugepages. Large improvements during demand faulting
   are demonstrated (David Hildenbrand)

 - "memcg cleanups" tidies up some memcg code (Chen Ridong)

 - "mm/damon: introduce {,max_}nr_snapshots and tracepoint for damos
   stats" improves DAMOS stat's provided information, deterministic
   control, and readability (SeongJae Park)

 - "selftests/mm: hugetlb cgroup charging: robustness fixes" fixes a few
   issues in the hugetlb cgroup charging selftests (Li Wang)

 - "Fix va_high_addr_switch.sh test failure - again" addresses several
   issues in the va_high_addr_switch test (Chunyu Hu)

 - "mm/damon/tests/core-kunit: extend existing test scenarios" improves
   the KUnit test coverage for DAMON (Shu Anzai)

 - "mm/khugepaged: fix dirty page handling for MADV_COLLAPSE" fixes a
   glitch in khugepaged which was causing madvise(MADV_COLLAPSE) to
   transiently return -EAGAIN (Shivank Garg)

 - "arch, mm: consolidate hugetlb early reservation" reworks and
   consolidates a pile of straggly code related to reservation of
   hugetlb memory from bootmem and creation of CMA areas for hugetlb
   (Mike Rapoport)

 - "mm: clean up anon_vma implementation" cleans up the anon_vma
   implementation in various ways (Lorenzo Stoakes)

 - "tweaks for __alloc_pages_slowpath()" does a little streamlining of
   the page allocator's slowpath code (Vlastimil Babka)

 - "memcg: separate private and public ID namespaces" cleans up the
   memcg ID code and prevents the internal-only private IDs from being
   exposed to userspace (Shakeel Butt)

 - "mm: hugetlb: allocate frozen gigantic folio" cleans up the
   allocation of frozen folios and avoids some atomic refcount
   operations (Kefeng Wang)

 - "mm/damon: advance DAMOS-based LRU sorting" improves DAMOS's movement
   of memory betewwn the active and inactive LRUs and adds auto-tuning
   of the ratio-based quotas and of monitoring intervals (SeongJae Park)

 - "Support page table check on PowerPC" makes
   CONFIG_PAGE_TABLE_CHECK_ENFORCED work on powerpc (Andrew Donnellan)

 - "nodemask: align nodes_and{,not} with underlying bitmap ops" makes
   nodes_and() and nodes_andnot() propagate the return values from the
   underlying bit operations, enabling some cleanup in calling code
   (Yury Norov)

 - "mm/damon: hide kdamond and kdamond_lock from API callers" cleans up
   some DAMON internal interfaces (SeongJae Park)

 - "mm/khugepaged: cleanups and scan limit fix" does some cleanup work
   in khupaged and fixes a scan limit accounting issue (Shivank Garg)

 - "mm: balloon infrastructure cleanups" goes to town on the balloon
   infrastructure and its page migration function. Mainly cleanups, also
   some locking simplification (David Hildenbrand)

 - "mm/vmscan: add tracepoint and reason for kswapd_failures reset" adds
   additional tracepoints to the page reclaim code (Jiayuan Chen)

 - "Replace wq users and add WQ_PERCPU to alloc_workqueue() users" is
   part of Marco's kernel-wide migration from the legacy workqueue APIs
   over to the preferred unbound workqueues (Marco Crivellari)

 - "Various mm kselftests improvements/fixes" provides various unrelated
   improvements/fixes for the mm kselftests (Kevin Brodsky)

 - "mm: accelerate gigantic folio allocation" greatly speeds up gigantic
   folio allocation, mainly by avoiding unnecessary work in
   pfn_range_valid_contig() (Kefeng Wang)

 - "selftests/damon: improve leak detection and wss estimation
   reliability" improves the reliability of two of the DAMON selftests
   (SeongJae Park)

 - "mm/damon: cleanup kdamond, damon_call(), damos filter and
   DAMON_MIN_REGION" does some cleanup work in the core DAMON code
   (SeongJae Park)

 - "Docs/mm/damon: update intro, modules, maintainer profile, and misc"
   performs maintenance work on the DAMON documentation (SeongJae Park)

 - "mm: add and use vma_assert_stabilised() helper" refactors and cleans
   up the core VMA code. The main aim here is to be able to use the mmap
   write lock's lockdep state to perform various assertions regarding
   the locking which the VMA code requires (Lorenzo Stoakes)

 - "mm, swap: swap table phase II: unify swapin use" removes some old
   swap code (swap cache bypassing and swap synchronization) which
   wasn't working very well. Various other cleanups and simplifications
   were made. The end result is a 20% speedup in one benchmark (Kairui
   Song)

 - "enable PT_RECLAIM on more 64-bit architectures" makes PT_RECLAIM
   available on 64-bit alpha, loongarch, mips, parisc, and um. Various
   cleanups were performed along the way (Qi Zheng)

* tag 'mm-stable-2026-02-11-19-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (325 commits)
  mm/memory: handle non-split locks correctly in zap_empty_pte_table()
  mm: move pte table reclaim code to memory.c
  mm: make PT_RECLAIM depends on MMU_GATHER_RCU_TABLE_FREE
  mm: convert __HAVE_ARCH_TLB_REMOVE_TABLE to CONFIG_HAVE_ARCH_TLB_REMOVE_TABLE config
  um: mm: enable MMU_GATHER_RCU_TABLE_FREE
  parisc: mm: enable MMU_GATHER_RCU_TABLE_FREE
  mips: mm: enable MMU_GATHER_RCU_TABLE_FREE
  LoongArch: mm: enable MMU_GATHER_RCU_TABLE_FREE
  alpha: mm: enable MMU_GATHER_RCU_TABLE_FREE
  mm: change mm/pt_reclaim.c to use asm/tlb.h instead of asm-generic/tlb.h
  mm/damon/stat: remove __read_mostly from memory_idle_ms_percentiles
  zsmalloc: make common caches global
  mm: add SPDX id lines to some mm source files
  mm/zswap: use %pe to print error pointers
  mm/vmscan: use %pe to print error pointers
  mm/readahead: fix typo in comment
  mm: khugepaged: fix NR_FILE_PAGES and NR_SHMEM in collapse_file()
  mm: refactor vma_map_pages to use vm_insert_pages
  mm/damon: unify address range representation with damon_addr_range
  mm/cma: replace snprintf with strscpy in cma_new_area
  ...
 2026-02-12 11:32:37 -08:00
Linus Torvalds
37a93dd5c4 Networking changes for 7.0 
Core & protocols
 ----------------
 
  - A significant effort all around the stack to guide the compiler to
    make the right choice when inlining code, to avoid unneeded calls for
    small helper and stack canary overhead in the fast-path. This
    generates better and faster code with very small or no text size
    increases, as in many cases the call generated more code than the
    actual inlined helper.
 
  - Extend AccECN implementation so that is now functionally complete,
    also allow the user-space enabling it on a per network namespace
    basis.
 
  - Add support for memory providers with large (above 4K) rx buffer.
    Paired with hw-gro, larger rx buffer sizes reduce the number of
    buffers traversing the stack, dincreasing single stream CPU usage by
    up to ~30%.
 
  - Do not add HBH header to Big TCP GSO packets. This simplifies the RX
    path, the TX path and the NIC drivers, and is possible because
    user-space taps can now interpret correctly such packets without the
    HBH hint.
 
  - Allow IPv6 routes to be configured with a gateway address that is
    resolved out of a different interface than the one specified, aligning
    IPv6 to IPv4 behavior.
 
  - Multi-queue aware sch_cake. This makes it possible to scale the rate
    shaper of sch_cake across multiple CPUs, while still enforcing a
    single global rate on the interface.
 
  - Add support for the nbcon (new buffer console) infrastructure to
    netconsole, enabling lock-free, priority-based console operations that
    are safer in crash scenarios.
 
  - Improve the TCP ipv6 output path to cache the flow information, saving
    cpu cycles, reducing cache line misses and stack use.
 
  - Improve netfilter packet tracker to resolve clashes for most protocols,
    avoiding unneeded drops on rare occasions.
 
  - Add IP6IP6 tunneling acceleration to the flowtable infrastructure.
 
  - Reduce tcp socket size by one cache line.
 
  - Notify neighbour changes atomically, avoiding inconsistencies between
    the notification sequence and the actual states sequence.
 
  - Add vsock namespace support, allowing complete isolation of vsocks
    across different network namespaces.
 
  - Improve xsk generic performances with cache-alignment-oriented
    optimizations.
 
  - Support netconsole automatic target recovery, allowing netconsole
    to reestablish targets when underlying low-level interface comes back
    online.
 
 Driver API
 ----------
 
  - Support for switching the working mode (automatic vs manual) of a DPLL
    device via netlink.
 
  - Introduce PHY ports representation to expose multiple front-facing
    media ports over a single MAC.
 
  - Introduce "rx-polarity" and "tx-polarity" device tree properties, to
    generalize polarity inversion requirements for differential signaling.
 
  - Add helper to create, prepare and enable managed clocks.
 
 Device drivers
 --------------
 
  - Add Huawei hinic3 PF etherner driver.
 
  - Add DWMAC glue driver for Motorcomm YT6801 PCIe ethernet controller.
 
  - Add ethernet driver for MaxLinear MxL862xx switches
 
  - Remove parallel-port Ethernet driver.
 
  - Convert existing driver timestamp configuration reporting to
    hwtstamp_get and remove legacy ioctl().
 
  - Convert existing drivers to .get_rx_ring_count(), simplifing the RX
    ring count retrieval. Also remove the legacy fallback path.
 
  - Ethernet high-speed NICs:
    - Broadcom (bnxt, bng):
      - bnxt: add FW interface update to support FEC stats histogram and
        NVRAM defragmentation
      - bng: add TSO and H/W GRO support
    - nVidia/Mellanox (mlx5):
      - improve latency of channel restart operations, reducing the used
        H/W resources
      - add TSO support for UDP over GRE over VLAN
      - add flow counters support for hardware steering (HWS) rules
      - use a static memory area to store headers for H/W GRO, leading to
        12% RX tput improvement
    - Intel (100G, ice, idpf):
      - ice: reorganizes layout of Tx and Rx rings for cacheline
        locality and utilizes __cacheline_group* macros on the new layouts
      - ice: introduces Synchronous Ethernet (SyncE) support
    - Meta (fbnic):
      - adds debugfs for firmware mailbox and tx/rx rings vectors
 
  - Ethernet virtual:
    - geneve: introduce GRO/GSO support for double UDP encapsulation
 
  - Ethernet NICs consumer, and embedded:
    - Synopsys (stmmac):
      - some code refactoring and cleanups
    - RealTek (r8169):
      - add support for RTL8127ATF (10G Fiber SFP)
      - add dash and LTR support
    - Airoha:
      - AN8811HB 2.5 Gbps phy support
    - Freescale (fec):
      - add XDP zero-copy support
    - Thunderbolt:
      - add get link setting support to allow bonding
    - Renesas:
      - add support for RZ/G3L GBETH SoC
 
  - Ethernet switches:
    - Maxlinear:
      - support R(G)MII slow rate configuration
      - add support for Intel GSW150
    - Motorcomm (yt921x):
      - add DCB/QoS support
    - TI:
      - icssm-prueth: support bridging (STP/RSTP) via the switchdev
        framework
 
  - Ethernet PHYs:
    - Realtek:
      - enable SGMII and 2500Base-X in-band auto-negotiation
      - simplify and reunify C22/C45 drivers
    - Micrel: convert bindings to DT schema
 
  - CAN:
    - move skb headroom content into skb extensions, making CAN metadata
      access more robust
 
  - CAN drivers:
    - rcar_canfd:
      - add support for FD-only mode
      - add support for the RZ/T2H SoC
    - sja1000: cleanup the CAN state handling
 
  - WiFi:
    - implement EPPKE/802.1X over auth frames support
    - split up drop reasons better, removing generic RX_DROP
    - additional FTM capabilities: 6 GHz support, supported number of
      spatial streams and supported number of LTF repetitions
    - better mac80211 iterators to enumerate resources
    - initial UHR (Wi-Fi 8) support for cfg80211/mac80211
 
  - WiFi drivers:
    - Qualcomm/Atheros:
      - ath11k: support for Channel Frequency Response measurement
      - ath12k: a significant driver refactor to support
        multi-wiphy devices and and pave the way for future device support
        in the same driver (rather than splitting to ath13k)
      - ath12k: support for the QCC2072 chipset
    - Intel:
      - iwlwifi: partial Neighbor Awareness Networking (NAN) support
      - iwlwifi: initial support for U-NII-9 and IEEE 802.11bn
    - RealTek (rtw89):
      - preparations for RTL8922DE support
 
  - Bluetooth:
    - implement setsockopt(BT_PHY) to set the connection packet type/PHY
    - set link_policy on incoming ACL connections
 
  - Bluetooth drivers:
    - btusb: add support for MediaTek7920, Realtek RTL8761BU and 8851BE
    - btqca: add WCN6855 firmware priority selection feature
 
 Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Merge tag 'net-next-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Paolo Abeni:
 "Core & protocols:

   - A significant effort all around the stack to guide the compiler to
     make the right choice when inlining code, to avoid unneeded calls
     for small helper and stack canary overhead in the fast-path.

     This generates better and faster code with very small or no text
     size increases, as in many cases the call generated more code than
     the actual inlined helper.

   - Extend AccECN implementation so that is now functionally complete,
     also allow the user-space enabling it on a per network namespace
     basis.

   - Add support for memory providers with large (above 4K) rx buffer.
     Paired with hw-gro, larger rx buffer sizes reduce the number of
     buffers traversing the stack, dincreasing single stream CPU usage
     by up to ~30%.

   - Do not add HBH header to Big TCP GSO packets. This simplifies the
     RX path, the TX path and the NIC drivers, and is possible because
     user-space taps can now interpret correctly such packets without
     the HBH hint.

   - Allow IPv6 routes to be configured with a gateway address that is
     resolved out of a different interface than the one specified,
     aligning IPv6 to IPv4 behavior.

   - Multi-queue aware sch_cake. This makes it possible to scale the
     rate shaper of sch_cake across multiple CPUs, while still enforcing
     a single global rate on the interface.

   - Add support for the nbcon (new buffer console) infrastructure to
     netconsole, enabling lock-free, priority-based console operations
     that are safer in crash scenarios.

   - Improve the TCP ipv6 output path to cache the flow information,
     saving cpu cycles, reducing cache line misses and stack use.

   - Improve netfilter packet tracker to resolve clashes for most
     protocols, avoiding unneeded drops on rare occasions.

   - Add IP6IP6 tunneling acceleration to the flowtable infrastructure.

   - Reduce tcp socket size by one cache line.

   - Notify neighbour changes atomically, avoiding inconsistencies
     between the notification sequence and the actual states sequence.

   - Add vsock namespace support, allowing complete isolation of vsocks
     across different network namespaces.

   - Improve xsk generic performances with cache-alignment-oriented
     optimizations.

   - Support netconsole automatic target recovery, allowing netconsole
     to reestablish targets when underlying low-level interface comes
     back online.

  Driver API:

   - Support for switching the working mode (automatic vs manual) of a
     DPLL device via netlink.

   - Introduce PHY ports representation to expose multiple front-facing
     media ports over a single MAC.

   - Introduce "rx-polarity" and "tx-polarity" device tree properties,
     to generalize polarity inversion requirements for differential
     signaling.

   - Add helper to create, prepare and enable managed clocks.

  Device drivers:

   - Add Huawei hinic3 PF etherner driver.

   - Add DWMAC glue driver for Motorcomm YT6801 PCIe ethernet
     controller.

   - Add ethernet driver for MaxLinear MxL862xx switches

   - Remove parallel-port Ethernet driver.

   - Convert existing driver timestamp configuration reporting to
     hwtstamp_get and remove legacy ioctl().

   - Convert existing drivers to .get_rx_ring_count(), simplifing the RX
     ring count retrieval. Also remove the legacy fallback path.

   - Ethernet high-speed NICs:
      - Broadcom (bnxt, bng):
         - bnxt: add FW interface update to support FEC stats histogram
           and NVRAM defragmentation
         - bng: add TSO and H/W GRO support
      - nVidia/Mellanox (mlx5):
         - improve latency of channel restart operations, reducing the
           used H/W resources
         - add TSO support for UDP over GRE over VLAN
         - add flow counters support for hardware steering (HWS) rules
         - use a static memory area to store headers for H/W GRO,
           leading to 12% RX tput improvement
      - Intel (100G, ice, idpf):
         - ice: reorganizes layout of Tx and Rx rings for cacheline
           locality and utilizes __cacheline_group* macros on the new
           layouts
         - ice: introduces Synchronous Ethernet (SyncE) support
      - Meta (fbnic):
         - adds debugfs for firmware mailbox and tx/rx rings vectors

   - Ethernet virtual:
      - geneve: introduce GRO/GSO support for double UDP encapsulation

   - Ethernet NICs consumer, and embedded:
      - Synopsys (stmmac):
         - some code refactoring and cleanups
      - RealTek (r8169):
         - add support for RTL8127ATF (10G Fiber SFP)
         - add dash and LTR support
      - Airoha:
         - AN8811HB 2.5 Gbps phy support
      - Freescale (fec):
         - add XDP zero-copy support
      - Thunderbolt:
         - add get link setting support to allow bonding
      - Renesas:
         - add support for RZ/G3L GBETH SoC

   - Ethernet switches:
      - Maxlinear:
         - support R(G)MII slow rate configuration
         - add support for Intel GSW150
      - Motorcomm (yt921x):
         - add DCB/QoS support
      - TI:
         - icssm-prueth: support bridging (STP/RSTP) via the switchdev
           framework

   - Ethernet PHYs:
      - Realtek:
         - enable SGMII and 2500Base-X in-band auto-negotiation
         - simplify and reunify C22/C45 drivers
      - Micrel: convert bindings to DT schema

   - CAN:
      - move skb headroom content into skb extensions, making CAN
        metadata access more robust

   - CAN drivers:
      - rcar_canfd:
         - add support for FD-only mode
         - add support for the RZ/T2H SoC
      - sja1000: cleanup the CAN state handling

   - WiFi:
      - implement EPPKE/802.1X over auth frames support
      - split up drop reasons better, removing generic RX_DROP
      - additional FTM capabilities: 6 GHz support, supported number of
        spatial streams and supported number of LTF repetitions
      - better mac80211 iterators to enumerate resources
      - initial UHR (Wi-Fi 8) support for cfg80211/mac80211

   - WiFi drivers:
      - Qualcomm/Atheros:
         - ath11k: support for Channel Frequency Response measurement
         - ath12k: a significant driver refactor to support multi-wiphy
           devices and and pave the way for future device support in the
           same driver (rather than splitting to ath13k)
         - ath12k: support for the QCC2072 chipset
      - Intel:
         - iwlwifi: partial Neighbor Awareness Networking (NAN) support
         - iwlwifi: initial support for U-NII-9 and IEEE 802.11bn
      - RealTek (rtw89):
         - preparations for RTL8922DE support

   - Bluetooth:
      - implement setsockopt(BT_PHY) to set the connection packet type/PHY
      - set link_policy on incoming ACL connections

   - Bluetooth drivers:
      - btusb: add support for MediaTek7920, Realtek RTL8761BU and 8851BE
      - btqca: add WCN6855 firmware priority selection feature"

* tag 'net-next-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1254 commits)
  bnge/bng_re: Add a new HSI
  net: macb: Fix tx/rx malfunction after phy link down and up
  af_unix: Fix memleak of newsk in unix_stream_connect().
  net: ti: icssg-prueth: Add optional dependency on HSR
  net: dsa: add basic initial driver for MxL862xx switches
  net: mdio: add unlocked mdiodev C45 bus accessors
  net: dsa: add tag format for MxL862xx switches
  dt-bindings: net: dsa: add MaxLinear MxL862xx
  selftests: drivers: net: hw: Modify toeplitz.c to poll for packets
  octeontx2-pf: Unregister devlink on probe failure
  net: renesas: rswitch: fix forwarding offload statemachine
  ionic: Rate limit unknown xcvr type messages
  tcp: inet6_csk_xmit() optimization
  tcp: populate inet->cork.fl.u.ip6 in tcp_v6_syn_recv_sock()
  tcp: populate inet->cork.fl.u.ip6 in tcp_v6_connect()
  ipv6: inet6_csk_xmit() and inet6_csk_update_pmtu() use inet->cork.fl.u.ip6
  ipv6: use inet->cork.fl.u.ip6 and np->final in ip6_datagram_dst_update()
  ipv6: use np->final in inet6_sk_rebuild_header()
  ipv6: add daddr/final storage in struct ipv6_pinfo
  net: stmmac: qcom-ethqos: fix qcom_ethqos_serdes_powerup()
  ...
 2026-02-11 19:31:52 -08:00
Linus Torvalds
61e629596f - dm-verity: various optimizations and fixes related to forward error 
correction
 
 - dm-verity: add a .dm-verity keyring
 
 - dm-integrity: fix bugs with growing a device in bitmap mode
 
 - dm-mpath: fix leaking fake timeout requests, a UAF bug caused by stale
   rq->bio and minor bugs in device creation
 
 - dm-core: fix a bug related to blkg association, avoid unnecessary
   blk-crypto work on invalid keys
 
 - dm-bufio: dm-bufio cleanup and optimization (reducing hash table
   lookups)
 
 - various other minor fixes and cleanups
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Merge tag 'for-7.0/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device mapper updates from Mikulas Patocka:

 - dm-verity:
     - various optimizations and fixes related to forward error correction
     - add a .dm-verity keyring

 - dm-integrity: fix bugs with growing a device in bitmap mode

 - dm-mpath:
     - fix leaking fake timeout requests
     - fix UAF bug caused by stale rq->bio
     - fix minor bugs in device creation

 - dm-core:
     - fix a bug related to blkg association
     - avoid unnecessary blk-crypto work on invalid keys

 - dm-bufio:
     - dm-bufio cleanup and optimization (reducing hash table lookups)

 - various other minor fixes and cleanups

* tag 'for-7.0/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (35 commits)
  dm mpath: make pg_init_delay_msecs settable
  Revert "dm: fix a race condition in retrieve_deps"
  dm mpath: Add missing dm_put_device when failing to get scsi dh name
  dm vdo encodings: clean up header and version functions
  dm: use bio_clone_blkg_association
  dm: fix excessive blk-crypto operations for invalid keys
  dm-verity: fix section mismatch error
  dm-unstripe: fix mapping bug when there are multiple targets in a table
  dm-integrity: fix recalculation in bitmap mode
  dm-bufio: avoid redundant buffer_tree lookups
  dm-bufio: merge cache_put() into cache_put_and_wake()
  selftests: add dm-verity keyring selftests
  dm-verity: add dm-verity keyring
  dm: clear cloned request bio pointer when last clone bio completes
  dm-verity: fix up various workqueue-related comments
  dm-verity: switch to bio_advance_iter_single()
  dm-verity: consolidate the BH and normal work structs
  dm: add WQ_PERCPU to alloc_workqueue users
  dm-integrity: fix a typo in the code for write/discard race
  dm: use READ_ONCE in dm_blk_report_zones
  ...
 2026-02-11 17:04:21 -08:00
Linus Torvalds
1e0ea4dff0 IOMMU Updates for Linux v7.0 
Including:
 
 	- Core changes:
 	  - Rust bindings for IO-pgtable code
 	  - IOMMU page allocation debugging support
 	  - Disable ATS during PCI resets
 
 	- Intel VT-d changes:
 	  - Skip dev-iotlb flush for inaccessible PCIe device
 	  - Flush cache for PASID table before using it
 	  - Use right invalidation method for SVA and NESTED domains
 	  - Ensure atomicity in context and PASID entry updates
 
 	- AMD-Vi changes:
 	  - Support for nested translations
 	  - Other minor improvements
 
 	- ARM-SMMU-v2 changes:
 	  - Configure SoC-specific prefetcher settings for Qualcomm's "MDSS".
 
 	- ARM-SMMU-v3 changes:
 	  - Improve CMDQ locking fairness for pathetically small queue sizes.
 	  - Remove tracking of the IAS as this is only relevant for AArch32 and
 	    was causing C_BAD_STE errors.
 	  - Add device-tree support for NVIDIA's CMDQV extension.
 	  - Allow some hitless transitions for the 'MEV' and 'EATS' STE fields.
 	  - Don't disable ATS for nested S1-bypass nested domains.
 	  - Additions to the kunit selftests.
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Merge tag 'iommu-updates-v7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux

Pull iommu updates from Joerg Roedel:
 "Core changes:
   - Rust bindings for IO-pgtable code
   - IOMMU page allocation debugging support
   - Disable ATS during PCI resets

  Intel VT-d changes:
   - Skip dev-iotlb flush for inaccessible PCIe device
   - Flush cache for PASID table before using it
   - Use right invalidation method for SVA and NESTED domains
   - Ensure atomicity in context and PASID entry updates

  AMD-Vi changes:
   - Support for nested translations
   - Other minor improvements

  ARM-SMMU-v2 changes:
   - Configure SoC-specific prefetcher settings for Qualcomm's "MDSS"

  ARM-SMMU-v3 changes:
   - Improve CMDQ locking fairness for pathetically small queue sizes
   - Remove tracking of the IAS as this is only relevant for AArch32 and
     was causing C_BAD_STE errors
   - Add device-tree support for NVIDIA's CMDQV extension
   - Allow some hitless transitions for the 'MEV' and 'EATS' STE fields
   - Don't disable ATS for nested S1-bypass nested domains
   - Additions to the kunit selftests"

* tag 'iommu-updates-v7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux: (54 commits)
  iommupt: Always add IOVA range to iotlb_gather in gather_range_pages()
  iommu/amd: serialize sequence allocation under concurrent TLB invalidations
  iommu/amd: Fix type of type parameter to amd_iommufd_hw_info()
  iommu/arm-smmu-v3: Do not set disable_ats unless vSTE is Translate
  iommu/arm-smmu-v3-test: Add nested s1bypass/s1dssbypass coverage
  iommu/arm-smmu-v3: Mark EATS_TRANS safe when computing the update sequence
  iommu/arm-smmu-v3: Mark STE MEV safe when computing the update sequence
  iommu/arm-smmu-v3: Add update_safe bits to fix STE update sequence
  iommu/arm-smmu-v3: Add device-tree support for CMDQV driver
  iommu/tegra241-cmdqv: Decouple driver from ACPI
  iommu/arm-smmu-qcom: Restore ACTLR settings for MDSS on sa8775p
  iommu/vt-d: Fix race condition during PASID entry replacement
  iommu/vt-d: Clear Present bit before tearing down context entry
  iommu/vt-d: Clear Present bit before tearing down PASID entry
  iommu/vt-d: Flush piotlb for SVM and Nested domain
  iommu/vt-d: Flush cache for PASID table before using it
  iommu/vt-d: Flush dev-IOTLB only when PCIe device is accessible in scalable mode
  iommu/vt-d: Skip dev-iotlb flush for inaccessible PCIe device without scalable mode
  rust: iommu: fix `srctree` link warning
  rust: iommu: fix Rust formatting
  ...
 2026-02-11 16:36:08 -08:00
Linus Torvalds
c22e26bd09 Landlock update for v7.0-rc1 
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Merge tag 'landlock-7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux

Pull landlock updates from Mickaël Salaün:

 - extend Landlock to enforce restrictions on a whole process, similarly
   to the seccomp's TSYNC flag

 - refactor data structures to simplify code and improve performance

 - add documentation to cover missing parts

* tag 'landlock-7.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux:
  mailmap: Add entry for Mickaël Salaün
  landlock: Transpose the layer masks data structure
  landlock: Add access_mask_subset() helper
  selftests/landlock: Add filesystem access benchmark
  landlock: Document audit blocker field format
  landlock: Add errata documentation section
  landlock: Add backwards compatibility for restrict flags
  landlock: Refactor TCP socket type check
  landlock: Minor reword of docs for TCP access rights
  landlock: Document LANDLOCK_RESTRICT_SELF_TSYNC
  selftests/landlock: Add LANDLOCK_RESTRICT_SELF_TSYNC tests
  landlock: Multithreading support for landlock_restrict_self()
 2026-02-11 15:57:08 -08:00
Linus Torvalds
ff661eeee2 cgroup: Changes for v6.20 
- cpuset changes:
 
   - Continue separating v1 and v2 implementations by moving more
     v1-specific logic into cpuset-v1.c.
 
   - Improve partition handling. Sibling partitions are no longer
     invalidated on cpuset.cpus conflict, cpuset.cpus changes no longer
     fail in v2, and effective_xcpus computation is made consistent.
 
   - Fix partition effective CPUs overlap that caused a warning on cpuset
     removal when sibling partitions shared CPUs.
 
 - Increase the maximum cgroup subsystem count from 16 to 32 to
   accommodate future subsystem additions.
 
 - Misc cleanups and selftest improvements including switching to
   css_is_online() helper, removing dead code and stale documentation
   references, using lockdep_assert_cpuset_lock_held() consistently,
   and adding polling helpers for asynchronously updated cgroup
   statistics.
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Merge tag 'cgroup-for-6.20' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

Pull cgroup updates from Tejun Heo:

 - cpuset changes:

    - Continue separating v1 and v2 implementations by moving more
      v1-specific logic into cpuset-v1.c

    - Improve partition handling. Sibling partitions are no longer
      invalidated on cpuset.cpus conflict, cpuset.cpus changes no longer
      fail in v2, and effective_xcpus computation is made consistent

    - Fix partition effective CPUs overlap that caused a warning on
      cpuset removal when sibling partitions shared CPUs

 - Increase the maximum cgroup subsystem count from 16 to 32 to
   accommodate future subsystem additions

 - Misc cleanups and selftest improvements including switching to
   css_is_online() helper, removing dead code and stale documentation
   references, using lockdep_assert_cpuset_lock_held() consistently, and
   adding polling helpers for asynchronously updated cgroup statistics

* tag 'cgroup-for-6.20' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: (21 commits)
  cpuset: fix overlap of partition effective CPUs
  cgroup: increase maximum subsystem count from 16 to 32
  cgroup: Remove stale cpu.rt.max reference from documentation
  cpuset: replace direct lockdep_assert_held() with lockdep_assert_cpuset_lock_held()
  cgroup/cpuset: Move the v1 empty cpus/mems check to cpuset1_validate_change()
  cgroup/cpuset: Don't invalidate sibling partitions on cpuset.cpus conflict
  cgroup/cpuset: Don't fail cpuset.cpus change in v2
  cgroup/cpuset: Consistently compute effective_xcpus in update_cpumasks_hier()
  cgroup/cpuset: Streamline rm_siblings_excl_cpus()
  cpuset: remove dead code in cpuset-v1.c
  cpuset: remove v1-specific code from generate_sched_domains
  cpuset: separate generate_sched_domains for v1 and v2
  cpuset: move update_domain_attr_tree to cpuset_v1.c
  cpuset: add cpuset1_init helper for v1 initialization
  cpuset: add cpuset1_online_css helper for v1-specific operations
  cpuset: add lockdep_assert_cpuset_lock_held helper
  cpuset: Remove unnecessary checks in rebuild_sched_domains_locked
  cgroup: switch to css_is_online() helper
  selftests: cgroup: Replace sleep with cg_read_key_long_poll() for waiting on nr_dying_descendants
  selftests: cgroup: make test_memcg_sock robust against delayed sock stats
  ...
 2026-02-11 13:20:50 -08:00
Linus Torvalds
9bdc64892d workqueue: Changes for v6.20 
- Rework the rescuer to process work items one-by-one instead of
   slurping all pending work items in a single pass. As there is only
   one rescuer per workqueue, a single long-blocking work item could
   cause high latency for all tasks queued behind it, even after memory
   pressure is relieved and regular kworkers become available to service
   them.
 
 - Add CONFIG_BOOTPARAM_WQ_STALL_PANIC build-time option and
   workqueue.panic_on_stall_time parameter for time-based stall panic,
   giving systems more control over workqueue stall handling.
 
 - Replace BUG_ON() with panic() in the stall panic path for clearer
   intent and more informative output.
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Merge tag 'wq-for-6.20' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

Pull workqueue updates from Tejun Heo:

 - Rework the rescuer to process work items one-by-one instead of
   slurping all pending work items in a single pass.

   As there is only one rescuer per workqueue, a single long-blocking
   work item could cause high latency for all tasks queued behind it,
   even after memory pressure is relieved and regular kworkers become
   available to service them.

 - Add CONFIG_BOOTPARAM_WQ_STALL_PANIC build-time option and
   workqueue.panic_on_stall_time parameter for time-based stall panic,
   giving systems more control over workqueue stall handling.

 - Replace BUG_ON() with panic() in the stall panic path for clearer
   intent and more informative output.

* tag 'wq-for-6.20' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: replace BUG_ON with panic in panic_on_wq_watchdog
  workqueue: add time-based panic for stalls
  workqueue: add CONFIG_BOOTPARAM_WQ_STALL_PANIC option
  workqueue: Process extra works in rescuer on memory pressure
  workqueue: Process rescuer work items one-by-one using a cursor
  workqueue: Make send_mayday() take a PWQ argument directly
 2026-02-11 13:13:32 -08:00
Linus Torvalds
b7ef56a076 [GIT PULL for v7.0] media updates 
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Merge tag 'media/v7.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media updates from Mauro Carvalho Chehab:

 - Add support for GMSL1 and GMSL‑coax modules (PCI mgb4)

 - Add driver for TI VIP

 - AV1 – first kernel support (pixel‑format, decoder, transcoder)

 - Three new camera‑sensor drivers (os05b10, s5k3m5, s5kjn1)

 - Synopsys CSI‑2 receiver driver

 - Verisilicon & rkvdec – major fixes and enhancements

 - IPU6 (and 7) fixes and preparation for metadata

 - omap3isp: v4l2-compliance updates

 - Fix DVB streaming, drop wait_prepare/finish (dvb/vb2)

* tag 'media/v7.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (307 commits)
  media: uvcvideo: Pass allocation size directly to uvc_alloc_urb_buffer
  media: uvcvideo: Fix allocation for small frame sizes
  media: uvcvideo: Return queued buffers on start_streaming() failure
  media: uvcvideo: Create an ID namespace for streaming output terminals
  media: rkvdec: Add HEVC support for the VDPU383 variant
  media: rkvdec: Add HEVC support for the VDPU381 variant
  media: rkvdec: Add H264 support for the VDPU383 variant
  media: rkvdec: Add H264 support for the VDPU381 variant
  media: rkvdec: Disable multicore support
  media: rkvdec: Enable all clocks without naming them
  media: rkvdec: Support per-variant interrupt handler
  media: rkvdec: Add RCB and SRAM support
  media: rkvdec: Add variant specific coded formats list
  media: rkvdec: Move hevc functions to common file
  media: rkvdec: Move h264 functions to common file
  media: rkvdec: Use structs to represent the HW RPS
  media: rkvdec: Move cabac tables to their own source file
  media: rkvdec: Switch to using structs instead of writel
  media: visl: Add HEVC short and long term RPS sets
  media: v4l2-ctrls: Add hevc_ext_sps_[ls]t_rps controls
  ...
 2026-02-11 12:20:25 -08:00
Artem Bityutskiy
c900e33e30 Documentation: PM: Document intel_idle.table command line option 
Add the 'intel_idle.table' command line option description to the
intel_idle document in admin-guide.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
[ rjw: Subject adjustment, changelog edits]
Link: https://patch.msgid.link/20260205125354.632891-1-artem.bityutskiy@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-02-11 21:08:23 +01:00
Paolo Bonzini
bf2c3138ae Merge tag 'kvm-x86-pmu-6.20' of https://github.com/kvm-x86/linux into HEAD 
KVM mediated PMU support for 6.20

Add support for mediated PMUs, where KVM gives the guest full ownership of PMU
hardware (contexted switched around the fastpath run loop) and allows direct
access to data MSRs and PMCs (restricted by the vPMU model), but intercepts
access to control registers, e.g. to enforce event filtering and to prevent the
guest from profiling sensitive host state.

To keep overall complexity reasonable, mediated PMU usage is all or nothing
for a given instance of KVM (controlled via module param).  The Mediated PMU
is disabled default, partly to maintain backwards compatilibity for existing
setup, partly because there are tradeoffs when running with a mediated PMU that
may be non-starters for some use cases, e.g. the host loses the ability to
profile guests with mediated PMUs, the fastpath run loop is also a blind spot,
entry/exit transitions are more expensive, etc.

Versus the emulated PMU, where KVM is "just another perf user", the mediated
PMU delivers more accurate profiling and monitoring (no risk of contention and
thus dropped events), with significantly less overhead (fewer exits and faster
emulation/programming of event selectors) E.g. when running Specint-2017 on
a single-socket Sapphire Rapids with 56 cores and no-SMT, and using perf from
within the guest:

  Perf command:
  a. basic-sampling: perf record -F 1000 -e 6-instructions  -a --overwrite
  b. multiplex-sampling: perf record -F 1000 -e 10-instructions -a --overwrite

  Guest performance overhead:
  ---------------------------------------------------------------------------
  | Test case          | emulated vPMU | all passthrough | passthrough with |
  |                    |               |                 | event filters    |
  ---------------------------------------------------------------------------
  | basic-sampling     |   33.62%      |    4.24%        |   6.21%          |
  ---------------------------------------------------------------------------
  | multiplex-sampling |   79.32%      |    7.34%        |   10.45%         |
  ---------------------------------------------------------------------------
 2026-02-11 12:45:40 -05:00
Linus Torvalds
192c015940 powerpc updates for 7.0 
- Implement masked user access
  - Add support for internal only per-CPU instructions and inline the bpf_get_smp_processor_id() and bpf_get_current_task()
  - Fix pSeries MSI-X allocation failure when quota is exceeded
  - Fix recursive pci_lock_rescan_remove locking in EEH event handling
  - Support tailcalls with subprogs & BPF exceptions on 64bit
  - Extend "trusted" keys to support the PowerVM Key Wrapping Module (PKWM)
 
 Thanks to: Abhishek Dubey, Christophe Leroy, Gaurav Batra, Guangshuo Li, Jarkko
 Sakkinen, Mahesh Salgaonkar, Mimi Zohar, Miquel Sabaté Solà, Nam Cao, Narayana
 Murty N, Nayna Jain, Nilay Shroff, Puranjay Mohan, Saket Kumar Bhaskar, Sourabh
 Jain, Srish Srinivasan, Venkat Rao Bagalkote,
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Merge tag 'powerpc-7.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates for 7.0

 - Implement masked user access

 - Add bpf support for internal only per-CPU instructions and inline the
   bpf_get_smp_processor_id() and bpf_get_current_task() functions

 - Fix pSeries MSI-X allocation failure when quota is exceeded

 - Fix recursive pci_lock_rescan_remove locking in EEH event handling

 - Support tailcalls with subprogs & BPF exceptions on 64bit

 - Extend "trusted" keys to support the PowerVM Key Wrapping Module
   (PKWM)

Thanks to Abhishek Dubey, Christophe Leroy, Gaurav Batra, Guangshuo Li,
Jarkko Sakkinen, Mahesh Salgaonkar, Mimi Zohar, Miquel Sabaté Solà, Nam
Cao, Narayana Murty N, Nayna Jain, Nilay Shroff, Puranjay Mohan, Saket
Kumar Bhaskar, Sourabh Jain, Srish Srinivasan, and Venkat Rao Bagalkote.

* tag 'powerpc-7.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (27 commits)
  powerpc/pseries: plpks: export plpks_wrapping_is_supported
  docs: trusted-encryped: add PKWM as a new trust source
  keys/trusted_keys: establish PKWM as a trusted source
  pseries/plpks: add HCALLs for PowerVM Key Wrapping Module
  pseries/plpks: expose PowerVM wrapping features via the sysfs
  powerpc/pseries: move the PLPKS config inside its own sysfs directory
  pseries/plpks: fix kernel-doc comment inconsistencies
  powerpc/smp: Add check for kcalloc() failure in parse_thread_groups()
  powerpc: kgdb: Remove OUTBUFMAX constant
  powerpc64/bpf: Additional NVR handling for bpf_throw
  powerpc64/bpf: Support exceptions
  powerpc64/bpf: Add arch_bpf_stack_walk() for BPF JIT
  powerpc64/bpf: Avoid tailcall restore from trampoline
  powerpc64/bpf: Support tailcalls with subprogs
  powerpc64/bpf: Moving tail_call_cnt to bottom of frame
  powerpc/eeh: fix recursive pci_lock_rescan_remove locking in EEH event handling
  powerpc/pseries: Fix MSI-X allocation failure when quota is exceeded
  powerpc/iommu: bypass DMA APIs for coherent allocations for pre-mapped memory
  powerpc64/bpf: Inline bpf_get_smp_processor_id() and bpf_get_current_task/_btf()
  powerpc64/bpf: Support internal-only MOV instruction to resolve per-CPU addrs
  ...
 2026-02-10 21:46:12 -08:00
Linus Torvalds
dcb4971018 - Extend the resctrl machinery to support telemetry monitoring on Intel. The 
practical usage of this is being able to tell how much energy or how much
   work can be attributed to a group of tasks tracked under a single
   idenitifier. Prepend this work with proper refactoring of resctrl domains
   handling code. Work by Tony Luck
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Merge tag 'x86_cache_for_v7.0_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 resource control updates from Borislav Petkov:

 - Extend the resctrl machinery to support telemetry monitoring on
   Intel (Tony Luck)

   The practical usage of this is being able to tell how much energy or
   how much work can be attributed to a group of tasks tracked under a
   single idenitifier. Prepend this work with proper refactoring of
   resctrl domains handling code.

* tag 'x86_cache_for_v7.0_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits)
  x86,fs/resctrl: Update documentation for telemetry events
  x86/resctrl: Enable RDT_RESOURCE_PERF_PKG
  fs/resctrl: Move RMID initialization to first mount
  x86,fs/resctrl: Compute number of RMIDs as minimum across resources
  fs/resctrl: Move allocation/free of closid_num_dirty_rmid[]
  x86/resctrl: Handle number of RMIDs supported by RDT_RESOURCE_PERF_PKG
  x86/resctrl: Add energy/perf choices to rdt boot option
  x86,fs/resctrl: Handle domain creation/deletion for RDT_RESOURCE_PERF_PKG
  fs/resctrl: Refactor rmdir_mondata_subdir_allrdtgrp()
  fs/resctrl: Refactor mkdir_mondata_subdir()
  x86/resctrl: Read telemetry events
  x86/resctrl: Find and enable usable telemetry events
  x86,fs/resctrl: Add architectural event pointer
  x86,fs/resctrl: Fill in details of events for performance and energy GUIDs
  x86/resctrl: Discover hardware telemetry events
  fs/resctrl: Emphasize that L3 monitoring resource is required for summing domains
  x86,fs/resctrl: Add and initialize a resource for package scope monitoring
  x86,fs/resctrl: Add an architectural hook called for first mount
  x86,fs/resctrl: Support binary fixed point event counters
  x86,fs/resctrl: Handle events that can be read from any CPU
  ...
 2026-02-10 18:24:56 -08:00
Linus Torvalds
5668a64622 x86/boot changes for v7.0: 
- x86/acpi: Add acpi=spcr to use SPCR-provided default console
    (Shenghao Yang)
 
  - x86/acpi/boot: Correct the acpi_is_processor_usable() check again
    (Yazen Ghannam)
 
  - Refresh the x86 memory map (e820 table) handling code, and
    make the printouts a bit more informative. (Ingo Molnar)
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-boot-2026-02-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86/boot updates from Ingo Molnar:

 - x86/acpi: Add acpi=spcr to use SPCR-provided default console
   (Shenghao Yang)

 - x86/acpi/boot: Correct the acpi_is_processor_usable() check again
   (Yazen Ghannam)

 - Refresh the x86 memory map (e820 table) handling code, and make the
   printouts a bit more informative (Ingo Molnar)

* tag 'x86-boot-2026-02-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits)
  x86/acpi: Add acpi=spcr to use SPCR-provided default console
  x86/boot/e820: Use <linux/sizes.h> symbols for literals
  x86/boot/e820: Make sure e820_search_gap() finds all gaps
  x86/boot/e820: Simplify the e820__range_remove() API
  x86/boot/e820: Remove e820__range_remove()'s unused return parameter
  x86/boot/e820: Simplify append_e820_table() and remove restriction on single-entry tables
  x86/boot/e820: Standardize __init/__initdata tag placement
  x86/boot/e820: Simplify & clarify __e820__range_add() a bit
  x86/boot/e820: Rename gap_start/gap_size to max_gap_start/max_gap_start in e820_search_gap() et al
  x86/boot/e820: Change e820_search_gap() to search for the highest-address PCI gap
  x86/boot/e820: Clean up e820__setup_pci_gap()/e820_search_gap() a bit
  x86/boot/e820: Change struct e820_table::nr_entries type from __u32 to u32
  x86/boot/e820: Standardize e820 table index variable types under 'u32'
  x86/boot/e820: Standardize e820 table index variable names under 'idx'
  x86/boot/e820: Remove unnecessary header inclusions
  x86/boot/e820: Clean up __refdata use a bit
  x86/boot/e820: Clean up __e820__range_add() a bit
  x86/boot/e820: Improve e820_print_type() messages
  x86/boot/e820: Clean up confusing and self-contradictory verbiage around E820 related resource allocations
  x86/boot/e820: Remove pointless early_panic() indirection
  ...
 2026-02-10 13:12:54 -08:00
Linus Torvalds
36ae1c45b2 Scheduler changes for v7.0: 
Scheduler Kconfig space updates:
 
  - Further consolidate configurable preemption modes: reduce
    the number of architectures that are allowed to offer
    PREEMPT_NONE and PREEMPT_VOLUNTARY, reducing the number
    of preemption models from four to just two: 'full' and 'lazy'
    on up-to-date architectures (arm64, loongarch, powerpc,
    riscv, s390, x86).
 
    None and voluntary are only available as legacy features
    on platforms that don't implement lazy preemption yet,
    or which don't even support preemption.
 
    The goal is to eventually remove cond_resched() and
    voluntary preemption altogether.
 
    (Peter Zijlstra)
 
 RSEQ based 'scheduler time slice extension' support:
 
 This allows a thread to request a time slice extension when it
 enters a critical section to avoid contention on a resource when
 the thread is scheduled out inside of the critical section.
 
  - Add fields and constants for time slice extension
  - Provide static branch for time slice extensions
  - Add statistics for time slice extensions
  - Add prctl() to enable time slice extensions
  - Implement sys_rseq_slice_yield()
  - Implement syscall entry work for time slice extensions
  - Implement time slice extension enforcement timer
  - Reset slice extension when scheduled
  - Implement rseq_grant_slice_extension()
  - entry: Hook up rseq time slice extension
  - selftests: Implement time slice extension test
 
    (Thomas Gleixner)
 
  - Allow registering RSEQ with slice extension
  - Move slice_ext_nsec to debugfs
  - Lower default slice extension
  - selftests/rseq: Add rseq slice histogram script
 
    (Peter Zijlstra)
 
 Scheduler performance/scalability improvements:
 
  - Update rq->avg_idle when a task is moved to an idle CPU,
    which improves the scalability of various workloads.
    (Shubhang Kaushik)
 
  - Reorder fields in 'struct rq' for better caching
    (Blake Jones)
 
  - Fair scheduler SMP NOHZ balancing code speedups:
 
    - Move checking for nohz cpus after time check
    - Change likelyhood of nohz.nr_cpus
    - Remove nohz.nr_cpus and use weight of cpumask instead
 
      (Shrikanth Hegde)
 
  - Avoid false sharing for sched_clock_irqtime (Wangyang Guo)
 
  - Drop useless cpumask_empty() in find_energy_efficient_cpu()
  - Simplify task_numa_find_cpu()
  - Use cpumask_weight_and() in sched_balance_find_dst_group()
 
    (Yury Norov)
 
 DL scheduler updates:
 
  - Add a deadline server for sched_ext tasks (by Andrea Righi and
    Joel Fernandes, with fixes by Peter Zijlstra)
 
 RT scheduler updates:
 
  - Skip currently executing CPU in rto_next_cpu() (Chen Jinghuang)
 
 Entry code updates and performance improvements, which is part of the
 scheduler tree in this cycle due to interdependencies with the RSEQ
 based time slice extension work:
 
   - Remove unused syscall argument from syscall_trace_enter()
   - Rework syscall_exit_to_user_mode_work() for architecture reuse
   - Add arch_ptrace_report_syscall_entry/exit()
   - Inline syscall_exit_work() and syscall_trace_enter()
 
     (Jinjie Ruan)
 
 Scheduler core updates:
 
  - Rework sched_class::wakeup_preempt() and rq_modified_*()
  - Avoid rq->lock bouncing in sched_balance_newidle()
  - Rename rcu_dereference_check_sched_domain() =>
           rcu_dereference_sched_domain()
  - <linux/compiler_types.h>: Add the __signed_scalar_typeof() helper
 
    (Peter Zijlstra)
 
 Fair scheduler updates/refactoring:
 
  - Fold the sched_avg update
  - Change rcu_dereference_check_sched_domain() to rcu-sched
  - Switch to rcu_dereference_all()
  - Remove superfluous rcu_read_lock()
  - Limit hrtick work
 
    (Peter Zijlstra)
 
  - Join two #ifdef CONFIG_FAIR_GROUP_SCHED blocks
  - Clean up comments in 'struct cfs_rq'
  - Separate se->vlag from se->vprot
  - Rename cfs_rq::avg_load to cfs_rq::sum_weight
  - Rename cfs_rq::avg_vruntime to ::sum_w_vruntime & helper functions
  - Introduce and use the vruntime_cmp() and vruntime_op() wrappers
    for wrapped-signed aritmetics
  - Sort out 'blocked_load*' namespace noise
 
    (Ingo Molnar)
 
 Scheduler debugging code updates:
 
  - Export hidden tracepoints to modules (Gabriele Monaco)
 
  - Convert copy_from_user() + kstrtouint() to kstrtouint_from_user()
    (Fushuai Wang)
 
  - Add assertions to QUEUE_CLASS (Peter Zijlstra)
 
  - hrtimer: Fix tracing oddity (Thomas Gleixner)
 
 Misc fixes and cleanups:
 
  - Re-evaluate scheduling when migrating queued tasks out of
    throttled cgroups (Zicheng Qu)
 
  - Remove task_struct->faults_disabled_mapping (Christoph Hellwig)
 
  - Fix math notation errors in avg_vruntime comment (Zhan Xusheng)
 
  - sched/cpufreq: Use %pe format for PTR_ERR() printing (zenghongling)
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'sched-core-2026-02-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler updates from Ingo Molnar:
 "Scheduler Kconfig space updates:

   - Further consolidate configurable preemption modes (Peter Zijlstra)

     Reduce the number of architectures that are allowed to offer
     PREEMPT_NONE and PREEMPT_VOLUNTARY, reducing the number of
     preemption models from four to just two: 'full' and 'lazy' on
     up-to-date architectures (arm64, loongarch, powerpc, riscv, s390,
     x86).

     None and voluntary are only available as legacy features on
     platforms that don't implement lazy preemption yet, or which don't
     even support preemption.

     The goal is to eventually remove cond_resched() and voluntary
     preemption altogether.

  RSEQ based 'scheduler time slice extension' support (Thomas Gleixner
  and Peter Zijlstra):

  This allows a thread to request a time slice extension when it enters
  a critical section to avoid contention on a resource when the thread
  is scheduled out inside of the critical section.

   - Add fields and constants for time slice extension
   - Provide static branch for time slice extensions
   - Add statistics for time slice extensions
   - Add prctl() to enable time slice extensions
   - Implement sys_rseq_slice_yield()
   - Implement syscall entry work for time slice extensions
   - Implement time slice extension enforcement timer
   - Reset slice extension when scheduled
   - Implement rseq_grant_slice_extension()
   - entry: Hook up rseq time slice extension
   - selftests: Implement time slice extension test
   - Allow registering RSEQ with slice extension
   - Move slice_ext_nsec to debugfs
   - Lower default slice extension
   - selftests/rseq: Add rseq slice histogram script

  Scheduler performance/scalability improvements:

   - Update rq->avg_idle when a task is moved to an idle CPU, which
     improves the scalability of various workloads (Shubhang Kaushik)

   - Reorder fields in 'struct rq' for better caching (Blake Jones)

   - Fair scheduler SMP NOHZ balancing code speedups (Shrikanth Hegde):
      - Move checking for nohz cpus after time check
      - Change likelyhood of nohz.nr_cpus
      - Remove nohz.nr_cpus and use weight of cpumask instead

   - Avoid false sharing for sched_clock_irqtime (Wangyang Guo)

   - Cleanups (Yury Norov):
      - Drop useless cpumask_empty() in find_energy_efficient_cpu()
      - Simplify task_numa_find_cpu()
      - Use cpumask_weight_and() in sched_balance_find_dst_group()

  DL scheduler updates:

   - Add a deadline server for sched_ext tasks (by Andrea Righi and Joel
     Fernandes, with fixes by Peter Zijlstra)

  RT scheduler updates:

   - Skip currently executing CPU in rto_next_cpu() (Chen Jinghuang)

  Entry code updates and performance improvements (Jinjie Ruan)

  This is part of the scheduler tree in this cycle due to inter-
  dependencies with the RSEQ based time slice extension work:

    - Remove unused syscall argument from syscall_trace_enter()
    - Rework syscall_exit_to_user_mode_work() for architecture reuse
    - Add arch_ptrace_report_syscall_entry/exit()
    - Inline syscall_exit_work() and syscall_trace_enter()

  Scheduler core updates (Peter Zijlstra):

   - Rework sched_class::wakeup_preempt() and rq_modified_*()
   - Avoid rq->lock bouncing in sched_balance_newidle()
   - Rename rcu_dereference_check_sched_domain() =>
            rcu_dereference_sched_domain()
   - <linux/compiler_types.h>: Add the __signed_scalar_typeof() helper

  Fair scheduler updates/refactoring (Peter Zijlstra and Ingo Molnar):

   - Fold the sched_avg update
   - Change rcu_dereference_check_sched_domain() to rcu-sched
   - Switch to rcu_dereference_all()
   - Remove superfluous rcu_read_lock()
   - Limit hrtick work
   - Join two #ifdef CONFIG_FAIR_GROUP_SCHED blocks
   - Clean up comments in 'struct cfs_rq'
   - Separate se->vlag from se->vprot
   - Rename cfs_rq::avg_load to cfs_rq::sum_weight
   - Rename cfs_rq::avg_vruntime to ::sum_w_vruntime & helper functions
   - Introduce and use the vruntime_cmp() and vruntime_op() wrappers for
     wrapped-signed aritmetics
   - Sort out 'blocked_load*' namespace noise

  Scheduler debugging code updates:

   - Export hidden tracepoints to modules (Gabriele Monaco)

   - Convert copy_from_user() + kstrtouint() to kstrtouint_from_user()
     (Fushuai Wang)

   - Add assertions to QUEUE_CLASS (Peter Zijlstra)

   - hrtimer: Fix tracing oddity (Thomas Gleixner)

  Misc fixes and cleanups:

   - Re-evaluate scheduling when migrating queued tasks out of throttled
     cgroups (Zicheng Qu)

   - Remove task_struct->faults_disabled_mapping (Christoph Hellwig)

   - Fix math notation errors in avg_vruntime comment (Zhan Xusheng)

   - sched/cpufreq: Use %pe format for PTR_ERR() printing
     (zenghongling)"

* tag 'sched-core-2026-02-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (64 commits)
  sched: Re-evaluate scheduling when migrating queued tasks out of throttled cgroups
  sched/cpufreq: Use %pe format for PTR_ERR() printing
  sched/rt: Skip currently executing CPU in rto_next_cpu()
  sched/clock: Avoid false sharing for sched_clock_irqtime
  selftests/sched_ext: Add test for DL server total_bw consistency
  selftests/sched_ext: Add test for sched_ext dl_server
  sched/debug: Fix dl_server (re)start conditions
  sched/debug: Add support to change sched_ext server params
  sched_ext: Add a DL server for sched_ext tasks
  sched/debug: Stop and start server based on if it was active
  sched/debug: Fix updating of ppos on server write ops
  sched/deadline: Clear the defer params
  entry: Inline syscall_exit_work() and syscall_trace_enter()
  entry: Add arch_ptrace_report_syscall_entry/exit()
  entry: Rework syscall_exit_to_user_mode_work() for architecture reuse
  entry: Remove unused syscall argument from syscall_trace_enter()
  sched: remove task_struct->faults_disabled_mapping
  sched: Update rq->avg_idle when a task is moved to an idle CPU
  selftests/rseq: Add rseq slice histogram script
  hrtimer: Fix trace oddity
  ...
 2026-02-10 12:50:10 -08:00
Linus Torvalds
b63c907203 keys: Support for ML-DSA module signing 
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Merge tag 'keys-next-20260206' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

Pull keys update from David Howells:
 "This adds support for ML-DSA signatures in X.509 certificates and
  PKCS#7/CMS messages, thereby allowing this algorithm to be used for
  signing modules, kexec'able binaries, wifi regulatory data, etc..

  This requires OpenSSL-3.5 at a minimum and preferably OpenSSL-4 (so
  that it can avoid the use of CMS signedAttrs - but that version is not
  cut yet). certs/Kconfig does a check to hide the signing options if
  OpenSSL does not list the algorithm as being available"

* tag 'keys-next-20260206' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  pkcs7: Change a pr_warn() to pr_warn_once()
  pkcs7: Allow authenticatedAttributes for ML-DSA
  modsign: Enable ML-DSA module signing
  pkcs7, x509: Add ML-DSA support
  pkcs7: Allow the signing algo to do whatever digestion it wants itself
  pkcs7, x509: Rename ->digest to ->m
  x509: Separately calculate sha256 for blacklist
  crypto: Add ML-DSA crypto_sig support
 2026-02-10 09:32:30 -08:00
Huacai Chen
009ee0c964 LoongArch: Add HOTPLUG_SMT implementation 
For benchmarking or debugging purpose, we usually want to control SMT
via boot parameter and sysfs knobs. So add HOTPLUG_SMT implementation.

1. Boot parameters:

nosmt:		Disable SMT, can be enabled via sysfs knobs.
nosmt=force:	Disable SMT, cannot be enabled via sysfs knobs.

2. Runtime sysfs controls:

Write "on", "off", "forceoff" or the number of SMT threads (1, 2, ...)
to /sys/devices/system/cpu/smt/control.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
 2026-02-10 19:31:13 +08:00
Linus Torvalds
72c395024d A slightly calmer cycle for docs this time around, though there is still a 
fair amount going on, including:
 
 - Some signs of life on the long-moribund Japanese translation
 
 - Documentation on policies around the use of generative tools for patch
   submissions, and a separate document intended for consumption by
   generative tools.
 
 - The completion of the move of the documentation tools to tools/docs.  For
   now we're leaving a /scripts/kernel-doc symlink behind to avoid breaking
   scripts.
 
 - Ongoing build-system work includes the incorporation of documentation in
   Python code, better support for documenting variables, and lots of
   improvements and fixes.
 
 - Automatic linking of man-page references -- cat(1), for example -- to
   the online pages in the HTML build.
 
 ...and the usual array of typo fixes and such.
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Merge tag 'docs-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/docs/linux

Pull documentation updates from Jonathan Corbet:
 "A slightly calmer cycle for docs this time around, though there is
  still a fair amount going on, including:

   - Some signs of life on the long-moribund Japanese translation

   - Documentation on policies around the use of generative tools for
     patch submissions, and a separate document intended for consumption
     by generative tools

   - The completion of the move of the documentation tools to
     tools/docs. For now we're leaving a /scripts/kernel-doc symlink
     behind to avoid breaking scripts

   - Ongoing build-system work includes the incorporation of
     documentation in Python code, better support for documenting
     variables, and lots of improvements and fixes

   - Automatic linking of man-page references -- cat(1), for example --
     to the online pages in the HTML build

  ...and the usual array of typo fixes and such"

* tag 'docs-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/docs/linux: (107 commits)
  doc: development-process: add notice on testing
  tools: sphinx-build-wrapper: improve its help message
  docs: sphinx-build-wrapper: allow -v override -q
  docs: kdoc: Fix pdfdocs build for tools
  docs: ja_JP: process: translate 'Obtain a current source tree'
  docs: fix 're-use' -> 'reuse' in documentation
  docs: ioctl-number: fix a typo in ioctl-number.rst
  docs: filesystems: ensure proc pid substitutable is complete
  docs: automarkup.py: Skip common English words as C identifiers
  Documentation: use a source-read extension for the index link boilerplate
  docs: parse_features: make documentation more consistent
  docs: add parse_features module documentation
  docs: jobserver: do some documentation improvements
  docs: add jobserver module documentation
  docs: kabi: helpers: add documentation for each "enum" value
  docs: kabi: helpers: add helper for debug bits 7 and 8
  docs: kabi: system_symbols: end docstring phrases with a dot
  docs: python: abi_regex: do some improvements at documentation
  docs: python: abi_parser: do some improvements at documentation
  docs: add kabi modules documentation
  ...
 2026-02-09 20:53:18 -08:00
Linus Torvalds
33120a2f8f xen: branch for v7.0-rc1 
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Merge tag 'for-linus-7.0-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen updates from Juergen Gross:

 - fix running as Xen PVH guest in 32-bit mode without PAE

 - fix PV device handling for suspend/resume when running as
   a Xen guest

 - clean up workqueue usage

 - fix the Xen balloon driver for PVH dom0

 - introduce the possibility to use hypercalls for console
   messages in unprivileged guests

 - enable Xen dom0 use of virtio devices in nested virtualization
   setups

 - simplify the xen-mcelog driver

* tag 'for-linus-7.0-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xenbus: Rename helpers to freeze/thaw/restore
  xenbus: Use .freeze/.thaw to handle xenbus devices
  xen/mcelog: simplify MCE_GETCLEAR_FLAGS using xchg()
  xen/balloon: improve accuracy of initial balloon target for dom0
  Partial revert "x86/xen: fix balloon target initialization for PVH dom0"
  xen: introduce xen_console_io option
  xen/virtio: Don't use grant-dma-ops when running as Dom0
  x86/xen/pvh: Enable PAE mode for 32-bit guest only when CONFIG_X86_PAE is set
  xen: privcmd: WQ_PERCPU added to alloc_workqueue users
  xen/events: replace use of system_wq with system_percpu_wq
 2026-02-09 20:38:27 -08:00
Linus Torvalds
9b1b3dcd28 Power management updates for 6.20-rc1/7.0-rc1 
- Remove the unused omap-cpufreq driver (Andreas Kemnade)
 
  - Optimize error handling code in cpufreq_boost_trigger_state() and
    make cpufreq_boost_trigger_state() return -EOPNOTSUPP if no policy
    supports boost (Lifeng Zheng)
 
  - Update cpufreq-dt-platdev list for tegra, qcom, TI (Aaron Kling,
    Dhruva Gole, and Konrad Dybcio)
 
  - Minor improvements to the cpufreq and cpumask rust implementation
    (Alexandre Courbot, Alice Ryhl, Tamir Duberstein, and Yilin Chen)
 
  - Add support for AM62L3 SoC to the ti-cpufreq driver (Dhruva Gole)
 
  - Update arch_freq_scale in the CPPC cpufreq driver's frequency
    invariance engine (FIE) in scheduler ticks if the related CPPC
    registers are not in PCC (Jie Zhan)
 
  - Assorted minor cleanups and improvements in ARM cpufreq drivers (Juan
    Martinez, Felix Gu, Luca Weiss, and Sergey Shtylyov)
 
  - Add generic helpers for sysfs show/store to cppc_cpufreq (Sumit
    Gupta)
 
  - Make the scaling_setspeed cpufreq sysfs attribute return the actual
    requested frequency to avoid confusion (Pengjie Zhang)
 
  - Simplify the idle CPU time granularity test in the ondemand cpufreq
    governor (Frederic Weisbecker)
 
  - Enable asym capacity in intel_pstate only when CPU SMT is not
    possible (Yaxiong Tian)
 
  - Update the description of rate_limit_us default value in cpufreq
    documentation (Yaxiong Tian)
 
  - Add a command line option to adjust the C-states table in the
    intel_idle driver, remove the 'preferred_cstates' module parameter
    from it, add C-states validation to it and clean it up (Artem
    Bityutskiy)
 
  - Make the menu cpuidle governor always check the time till the closest
    timer event when the scheduler tick has been stopped to prevent it
    from mistakenly selecting the deepest available idle state (Rafael
    Wysocki)
 
  - Update the teo cpuidle governor to avoid making suboptimal decisions
    in certain corner cases and generally improve idle state selection
    accuracy (Rafael Wysocki)
 
  - Remove an unlikely() annotation on the early-return condition in
    menu_select() that leads to branch misprediction 100% of the time
    on systems with only 1 idle state enabled, like ARM64 servers (Breno
    Leitao)
 
  - Add Christian Loehle to MAINTAINERS as a cpuidle reviewer (Christian
    Loehle)
 
  - Stop flagging the PM runtime workqueue as freezable to avoid system
    suspend and resume deadlocks in subsystems that assume asynchronous
    runtime PM to work during system-wide PM transitions (Rafael Wysocki)
 
  - Drop redundant NULL pointer checks before acomp_request_free() from
    the hibernation code handling image saving (Rafael Wysocki)
 
  - Update wakeup_sources_walk_start() to handle empty lists of wakeup
    sources as appropriate (Samuel Wu)
 
  - Make dev_pm_clear_wake_irq() check the power.wakeirq value under
    power.lock to avoid race conditions (Gui-Dong Han)
 
  - Avoid bit field races related to power.work_in_progress in the core
    device suspend code (Xuewen Yan)
 
  - Make several drivers discard pm_runtime_put() return value in
    preparation for converting that function to a void one (Rafael
    Wysocki)
 
  - Add PL4 support for Ice Lake to the Intel RAPL power capping
    driver (Daniel Tang)
 
  - Replace sprintf() with sysfs_emit() in power capping sysfs show
    functions (Sumeet Pawnikar)
 
  - Make dev_pm_opp_get_level() return value match the documentation
    after a previous update of the latter (Aleks Todorov)
 
  - Use scoped for each OF child loop in the OPP code (Krzysztof
    Kozlowski)
 
  - Fix a bug in an example code snippet and correct typos in the energy
    model management documentation (Patrick Little)
 
  - Fix miscellaneous problems in cpupower (Kaushlendra Kumar):
 
    * idle_monitor: Fix incorrect value logged after stop
    * Fix inverted APERF capability check
    * Use strcspn() to strip trailing newline
    * Reset errno before strtoull()
    * Show C0 in idle-info dump
 
  - Improve cpupower installation procedure by making the systemd step
    optional and allowing users to disable the installation of systemd's
    unit file (João Marcos Costa)
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Merge tag 'pm-6.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "By the number of commits, cpufreq is the leading party (again) and the
  most visible change there is the removal of the omap-cpufreq driver
  that has not been used for a long time (good riddance). There are also
  quite a few changes in the cppc_cpufreq driver, mostly related to
  fixing its frequency invariance engine in the case when the CPPC
  registers used by it are not in PCC. In addition to that, support for
  AM62L3 is added to the ti-cpufreq driver and the cpufreq-dt-platdev
  list is updated for some platforms. The remaining cpufreq changes are
  assorted fixes and cleanups.

  Next up is cpuidle and the changes there are dominated by intel_idle
  driver updates, mostly related to the new command line facility
  allowing users to adjust the list of C-states used by the driver.
  There are also a few updates of cpuidle governors, including two menu
  governor fixes and some refinements of the teo governor, and a
  MAINTAINERS update adding Christian Loehle as a cpuidle reviewer.
  [Thanks for stepping up Christian!]

  The most significant update related to system suspend and hibernation
  is the one to stop freezing the PM runtime workqueue during system PM
  transitions which allows some deadlocks to be avoided. There is also a
  fix for possible concurrent bit field updates in the core device
  suspend code and a few other minor fixes.

  Apart from the above, several drivers are updated to discard the
  return value of pm_runtime_put() which is going to be converted to a
  void function as soon as everybody stops using its return value, PL4
  support for Ice Lake is added to the Intel RAPL power capping driver,
  and there are assorted cleanups, documentation fixes, and some
  cpupower utility improvements.

  Specifics:

   - Remove the unused omap-cpufreq driver (Andreas Kemnade)

   - Optimize error handling code in cpufreq_boost_trigger_state() and
     make cpufreq_boost_trigger_state() return -EOPNOTSUPP if no policy
     supports boost (Lifeng Zheng)

   - Update cpufreq-dt-platdev list for tegra, qcom, TI (Aaron Kling,
     Dhruva Gole, and Konrad Dybcio)

   - Minor improvements to the cpufreq and cpumask rust implementation
     (Alexandre Courbot, Alice Ryhl, Tamir Duberstein, and Yilin Chen)

   - Add support for AM62L3 SoC to the ti-cpufreq driver (Dhruva Gole)

   - Update arch_freq_scale in the CPPC cpufreq driver's frequency
     invariance engine (FIE) in scheduler ticks if the related CPPC
     registers are not in PCC (Jie Zhan)

   - Assorted minor cleanups and improvements in ARM cpufreq drivers
     (Juan Martinez, Felix Gu, Luca Weiss, and Sergey Shtylyov)

   - Add generic helpers for sysfs show/store to cppc_cpufreq (Sumit
     Gupta)

   - Make the scaling_setspeed cpufreq sysfs attribute return the actual
     requested frequency to avoid confusion (Pengjie Zhang)

   - Simplify the idle CPU time granularity test in the ondemand cpufreq
     governor (Frederic Weisbecker)

   - Enable asym capacity in intel_pstate only when CPU SMT is not
     possible (Yaxiong Tian)

   - Update the description of rate_limit_us default value in cpufreq
     documentation (Yaxiong Tian)

   - Add a command line option to adjust the C-states table in the
     intel_idle driver, remove the 'preferred_cstates' module parameter
     from it, add C-states validation to it and clean it up (Artem
     Bityutskiy)

   - Make the menu cpuidle governor always check the time till the
     closest timer event when the scheduler tick has been stopped to
     prevent it from mistakenly selecting the deepest available idle
     state (Rafael Wysocki)

   - Update the teo cpuidle governor to avoid making suboptimal
     decisions in certain corner cases and generally improve idle state
     selection accuracy (Rafael Wysocki)

   - Remove an unlikely() annotation on the early-return condition in
     menu_select() that leads to branch misprediction 100% of the time
     on systems with only 1 idle state enabled, like ARM64 servers
     (Breno Leitao)

   - Add Christian Loehle to MAINTAINERS as a cpuidle reviewer
     (Christian Loehle)

   - Stop flagging the PM runtime workqueue as freezable to avoid system
     suspend and resume deadlocks in subsystems that assume asynchronous
     runtime PM to work during system-wide PM transitions (Rafael
     Wysocki)

   - Drop redundant NULL pointer checks before acomp_request_free() from
     the hibernation code handling image saving (Rafael Wysocki)

   - Update wakeup_sources_walk_start() to handle empty lists of wakeup
     sources as appropriate (Samuel Wu)

   - Make dev_pm_clear_wake_irq() check the power.wakeirq value under
     power.lock to avoid race conditions (Gui-Dong Han)

   - Avoid bit field races related to power.work_in_progress in the core
     device suspend code (Xuewen Yan)

   - Make several drivers discard pm_runtime_put() return value in
     preparation for converting that function to a void one (Rafael
     Wysocki)

   - Add PL4 support for Ice Lake to the Intel RAPL power capping driver
     (Daniel Tang)

   - Replace sprintf() with sysfs_emit() in power capping sysfs show
     functions (Sumeet Pawnikar)

   - Make dev_pm_opp_get_level() return value match the documentation
     after a previous update of the latter (Aleks Todorov)

   - Use scoped for each OF child loop in the OPP code (Krzysztof
     Kozlowski)

   - Fix a bug in an example code snippet and correct typos in the
     energy model management documentation (Patrick Little)

   - Fix miscellaneous problems in cpupower (Kaushlendra Kumar):
      * idle_monitor: Fix incorrect value logged after stop
      * Fix inverted APERF capability check
      * Use strcspn() to strip trailing newline
      * Reset errno before strtoull()
      * Show C0 in idle-info dump

   - Improve cpupower installation procedure by making the systemd step
     optional and allowing users to disable the installation of
     systemd's unit file (João Marcos Costa)"

* tag 'pm-6.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (65 commits)
  PM: sleep: core: Avoid bit field races related to work_in_progress
  PM: sleep: wakeirq: harden dev_pm_clear_wake_irq() against races
  cpufreq: Documentation: Update description of rate_limit_us default value
  cpufreq: intel_pstate: Enable asym capacity only when CPU SMT is not possible
  PM: wakeup: Handle empty list in wakeup_sources_walk_start()
  PM: EM: Documentation: Fix bug in example code snippet
  Documentation: Fix typos in energy model documentation
  cpuidle: governors: teo: Refine intercepts-based idle state lookup
  cpuidle: governors: teo: Adjust the classification of wakeup events
  cpufreq: ondemand: Simplify idle cputime granularity test
  cpufreq: userspace: make scaling_setspeed return the actual requested frequency
  PM: hibernate: Drop NULL pointer checks before acomp_request_free()
  cpufreq: CPPC: Add generic helpers for sysfs show/store
  cpufreq: scmi: Fix device_node reference leak in scmi_cpu_domain_id()
  cpufreq: ti-cpufreq: add support for AM62L3 SoC
  cpufreq: dt-platdev: Add ti,am62l3 to blocklist
  cpufreq/amd-pstate: Add comment explaining nominal_perf usage for performance policy
  cpufreq: scmi: correct SCMI explanation
  cpufreq: dt-platdev: Block the driver from probing on more QC platforms
  rust: cpumask: rename methods of Cpumask for clarity and consistency
  ...
 2026-02-09 19:00:42 -08:00
Linus Torvalds
56feb532bb xfs: new patches for Linux 7.0 
Signed-off-by: Carlos Maiolino <cem@kernel.org>
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Merge tag 'xfs-merge-7.0' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs updates from Carlos Maiolino:
 "This contains several improvements to zoned device support,
  performance improvements for the parent pointers, and a new health
  monitoring feature. There are some improvements in the journaling code
  too but no behavior change expected.

  Last but not least, some code refactoring and bug fixes are also
  included in this series"

* tag 'xfs-merge-7.0' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (67 commits)
  xfs: add sysfs stats for zoned GC
  xfs: give the defer_relog stat a xs_ prefix
  xfs: add zone reset error injection
  xfs: refactor zone reset handling
  xfs: don't mark all discard issued by zoned GC as sync
  xfs: allow setting errortags at mount time
  xfs: use WRITE_ONCE/READ_ONCE for m_errortag
  xfs: move the guts of XFS_ERRORTAG_DELAY out of line
  xfs: don't validate error tags in the I/O path
  xfs: allocate m_errortag early
  xfs: fix the errno sign for the xfs_errortag_{add,clearall} stubs
  xfs: validate log record version against superblock log version
  xfs: fix spacing style issues in xfs_alloc.c
  xfs: remove xfs_zone_gc_space_available
  xfs: use a seprate member to track space availabe in the GC scatch buffer
  xfs: check for deleted cursors when revalidating two btrees
  xfs: fix UAF in xchk_btree_check_block_owner
  xfs: check return value of xchk_scrub_create_subord
  xfs: only call xf{array,blob}_destroy if we have a valid pointer
  xfs: get rid of the xchk_xfile_*_descr calls
  ...
 2026-02-09 16:11:27 -08:00
Linus Torvalds
996812c453 vfs-7.0-rc1.initrd 
Please consider pulling these changes from the signed vfs-7.0-rc1.initrd tag.
 
 Thanks!
 Christian
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Merge tag 'vfs-7.0-rc1.initrd' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs initrd removal from Christian Brauner:
 "Remove the deprecated linuxrc-based initrd code path and related dead
  code. The linuxrc initrd path was deprecated in 2020 and this series
  completes its removal. If we see real-life regressions we'll revert.

  The core change removes handle_initrd() and init_linuxrc() — the
  entire flow that ran /linuxrc from an initrd, pivoted roots, and
  handed off to the real root filesystem. With that gone, initrd_load()
  becomes void (no longer short-circuits prepare_namespace()),
  rd_load_image() is simplified to always load /initrd.image instead of
  taking a path, and rd_load_disk() is deleted.

  The /proc/sys/kernel/real-root-dev sysctl and its backing variable are
  removed since they only existed for linuxrc to communicate the real
  root device back to the kernel.

  The no-op load_ramdisk= and prompt_ramdisk= parameters are dropped,
  and noinitrd and ramdisk_start= gain deprecation warnings.

  Initramfs is entirely unaffected. The non-linuxrc initrd path
  (root=/dev/ram0) is preserved but now carries a deprecation warning
  targeting January 2027 removal"

* tag 'vfs-7.0-rc1.initrd' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  init: remove /proc/sys/kernel/real-root-dev
  initrd: remove deprecated code path (linuxrc)
  init: remove deprecated "load_ramdisk" and "prompt_ramdisk" command line parameters
 2026-02-09 11:03:25 -08:00
Linus Torvalds
ef852baaf6 RCU changes for v7.0 
RCU Tasks Trace:
 
 Re-implement RCU tasks trace in term of SRCU-fast, not only more than 500 lines
 of code are saved because of the reimplementation, a new set of API,
 rcu_read_{,un}lock_tasks_trace(), becomes possible as well. Compared to the
 previous rcu_read_{,un}lock_trace(), the new API avoid the task_struct accesses
 thanks to the SRCU-fast semantics. As a result, the old
 rcu_read{,un}lock_trace() API is now deprecated.
 
 RCU Torture Test:
 
 - Multiple improvements on kvm-series.sh (parallel run and progress showing
   metrics)
 - Add context checks to rcu_torture_timer().
 - Make config2csv.sh properly handle comments in .boot files.
 - Include commit discription in testid.txt.
 
 Miscellaneous RCU changes:
 
 - Reduce synchronize_rcu() latency by reporting GP kthread's CPU QS early.
 - Use suitable gfp_flags for the init_srcu_struct_nodes().
 - Fix rcu_read_unlock() deadloop due to softirq.
 - Correctly compute probability to invoke ->exp_current() in rcutorture.
 - Make expedited RCU CPU stall warnings detect stall-end races.
 
 RCU nocb:
 
 - Remove unnecessary WakeOvfIsDeferred wake path and callback overload
   handling.
 - Extract nocb_defer_wakeup_cancel() helper.
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Merge tag 'rcu.release.v7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux

Pull RCU updates from Boqun Feng:

 - RCU Tasks Trace:

   Re-implement RCU tasks trace in term of SRCU-fast, not only more than
   500 lines of code are saved because of the reimplementation, a new
   set of API, rcu_read_{,un}lock_tasks_trace(), becomes possible as
   well. Compared to the previous rcu_read_{,un}lock_trace(), the new
   API avoid the task_struct accesses thanks to the SRCU-fast semantics.

   As a result, the old rcu_read{,un}lock_trace() API is now deprecated.

 - RCU Torture Test:
    - Multiple improvements on kvm-series.sh (parallel run and
      progress showing metrics)
    - Add context checks to rcu_torture_timer()
    - Make config2csv.sh properly handle comments in .boot files
    - Include commit discription in testid.txt

 - Miscellaneous RCU changes:
    - Reduce synchronize_rcu() latency by reporting GP kthread's
      CPU QS early
    - Use suitable gfp_flags for the init_srcu_struct_nodes()
    - Fix rcu_read_unlock() deadloop due to softirq
    - Correctly compute probability to invoke ->exp_current()
      in rcutorture
    - Make expedited RCU CPU stall warnings detect stall-end races

 - RCU nocb:
    - Remove unnecessary WakeOvfIsDeferred wake path and callback
      overload handling
    - Extract nocb_defer_wakeup_cancel() helper

* tag 'rcu.release.v7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux: (25 commits)
  rcu/nocb: Extract nocb_defer_wakeup_cancel() helper
  rcu/nocb: Remove dead callback overload handling
  rcu/nocb: Remove unnecessary WakeOvfIsDeferred wake path
  rcu: Reduce synchronize_rcu() latency by reporting GP kthread's CPU QS early
  srcu: Use suitable gfp_flags for the init_srcu_struct_nodes()
  rcu: Fix rcu_read_unlock() deadloop due to softirq
  rcutorture: Correctly compute probability to invoke ->exp_current()
  rcu: Make expedited RCU CPU stall warnings detect stall-end races
  rcutorture: Add --kill-previous option to terminate previous kvm.sh runs
  rcutorture: Prevent concurrent kvm.sh runs on same source tree
  torture: Include commit discription in testid.txt
  torture: Make config2csv.sh properly handle comments in .boot files
  torture: Make kvm-series.sh give run numbers and totals
  torture: Make kvm-series.sh give build numbers and totals
  torture: Parallelize kvm-series.sh guest-OS execution
  rcutorture: Add context checks to rcu_torture_timer()
  rcutorture: Test rcu_tasks_trace_expedite_current()
  srcu: Create an rcu_tasks_trace_expedite_current() function
  checkpatch: Deprecate rcu_read_{,un}lock_trace()
  rcu: Update Requirements.rst for RCU Tasks Trace
  ...
 2026-02-09 09:46:26 -08:00
Breno Leitao
f84c9dd34e workqueue: add time-based panic for stalls 
Add a new module parameter 'panic_on_stall_time' that triggers a panic
when a workqueue stall persists for longer than the specified duration
in seconds.

Unlike 'panic_on_stall' which counts accumulated stall events, this
parameter triggers based on the duration of a single continuous stall.
This is useful for catching truly stuck workqueues rather than
accumulating transient stalls.

Usage:
  workqueue.panic_on_stall_time=120

This would panic if any workqueue pool has been stalled for 120 seconds
or more.

The stall duration is measured from the workqueue last progress
(poll_ts) which accounts for legitimate system stalls.

Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2026-02-07 06:54:38 -10:00
Samasth Norway Ananda
de4b09abf0
landlock: Document audit blocker field format 
Add comprehensive documentation for the ``blockers`` field format
in AUDIT_LANDLOCK_ACCESS records, including all possible prefixes
(fs., net., scope.) and their meanings.

Also fix a typo and update the documentation date to reflect these
changes.

Signed-off-by: Samasth Norway Ananda <samasth.norway.ananda@oracle.com>
Link: https://lore.kernel.org/r/20260128031814.2945394-4-samasth.norway.ananda@oracle.com
Signed-off-by: Mickaël Salaün <mic@digikod.net>
 2026-02-06 17:54:43 +01:00
Joerg Roedel
ad09563660 Merge branches 'fixes', 'arm/smmu/updates', 'intel/vt-d', 'amd/amd-vi' and 'core' into next 2026-02-06 11:10:40 +01:00
Jakub Kicinski
a182a62ff7 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 
Cross-merge networking fixes after downstream PR (net-6.19-rc9).

No adjacent changes, conflicts:

drivers/net/ethernet/spacemit/k1_emac.c
  3125fc1701 ("net: spacemit: k1-emac: fix jumbo frame support")
  f66086798f ("net: spacemit: Remove broken flow control support")
https://lore.kernel.org/aYIysFIE9ooavWia@sirena.org.uk

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-02-05 09:54:08 -08:00
Greg Kroah-Hartman
917ad8a665 thunderbolt: Changes for v6.20 merge window 
This includes following USB4/Thunderbolt changes for the v6.20 merge
 window:
 
   - Tiny documentation update
   - Switch to use tb_warn() when logging path activation failures.
 
 Both have been in linux-next with no reported issues.
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Merge tag 'thunderbolt-for-v6.20-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt into usb-next

Mika writes:

thunderbolt: Changes for v6.20 merge window

This includes following USB4/Thunderbolt changes for the v6.20 merge
window:

  - Tiny documentation update
  - Switch to use tb_warn() when logging path activation failures.

Both have been in linux-next with no reported issues.

* tag 'thunderbolt-for-v6.20-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt:
  thunderbolt: Log path activation failures without WARN backtraces
  docs: admin-guide: thunderbolt: Replace ifconfig with ip
 2026-02-05 17:05:32 +01:00
Maurizio Lombardi
7bb8c40f5a nvme: add support for dynamic quirk configuration via module parameter 
Introduce support for enabling or disabling specific NVMe quirks at module
load time through the `quirks` module parameter.
This mechanism allows users to apply known quirks dynamically based on the
device's PCI vendor and device IDs, without requiring to add hardcoded
entries in the driver and recompiling the kernel.

While the generic PCI new_id sysfs interface exists for dynamic
configuration, it is insufficient for scenarios where the system fails
to boot (for example, this has been reported to happen because of the
bogus_nid quirk). The new_id attribute is writable only after the system
has booted and sysfs is mounted.

The `quirks` parameter accepts a list of quirk specifications separated by
a '-' character in the following format:

<VID>:<DID>:<quirk_names>[-<VID>:<DID>:<quirk_names>-..]

Each quirk is represented by its name and can be prefixed with `^` to
indicate that the quirk should be disabled; quirk names are separated by
a ',' character.

Example: enable BOGUS_NID and BROKEN_MSI, disable DEALLOCATE_ZEROES:

   $ modprobe nvme quirks=7170:2210:bogus_nid,broken_msi,^deallocate_zeroes

Tested-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
 2026-02-05 07:35:58 -08:00
Masami Hiramatsu (Google)
1cadf2819b bootconfig: Terminate value search if it hits a newline 
Terminate the value search for a key if it hits a newline and make
the value empty.

When we pass a bootconfig with an empty value terminated by the
newline, like below::

  foo =
  bar = value

Current bootconfig interprets it as a single entry::

  foo = "bar = value";

The Documentation/admin-guide/bootconfig.rst defines the value
itself is terminated by newline:

  The value has to be terminated by semi-colon (``;``) or newline (``\n``).

but it does not define when the value search is terminated.
This changes the behavior to be more line-oriented, so that it is
clearer in how it works.

- The value search of key-value pair will be terminated by a comment
  or newline.
- The value search of an array will continue beyond comments and
  newlines.

Thus, with this update, the above example is interpreted as::

  foo = "";
  bar = "value";

And the below example will cause a syntax error because "bar" is expected
as a key but it has ','.

  foo =
    bar, buz

According to this change, one wrong example config is updated.

Link: https://lore.kernel.org/all/177025238503.14982.17059549076175612447.stgit@devnote2/

Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
 2026-02-05 22:21:07 +09:00
Linus Torvalds
b20624608f 5 hotfixes. 2 are cc:stable, 2 are for MM. 
All are singletons - please see the changelogs for details.
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Merge tag 'mm-hotfixes-stable-2026-02-04-15-55' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc fixes from Andrew Morton:
 "Five hotfixes.  Two are cc:stable, two are for MM.

  All are singletons - please see the changelogs for details"

* tag 'mm-hotfixes-stable-2026-02-04-15-55' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  Documentation: document liveupdate cmdline parameter
  mm, shmem: prevent infinite loop on truncate race
  mailmap: update Alexander Mikhalitsyn's emails
  liveupdate: luo_file: do not clear serialized_data on unfreeze
  x86/kfence: fix booting on 32bit non-PAE systems
 2026-02-04 16:04:00 -08:00
Yaxiong Tian
3bd1cde3df cpufreq: Documentation: Update description of rate_limit_us default value 
Due to commit 37c6dccd68 ("cpufreq: Remove LATENCY_MULTIPLIER")
updating the acquisition logic of cpufreq_policy_transition_delay_us(),
the original description of 2 ms has become inaccurate.

Therefore, update the description of the default value for
rate_limit_us from 2ms to 1ms.

Signed-off-by: Yaxiong Tian <tianyaxiong@kylinos.cn>
[ rjw: Subject and changelog edits ]
Link: https://patch.msgid.link/20260203093501.1138721-1-tianyaxiong@kylinos.cn
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2026-02-03 22:18:39 +01:00
Breno Leitao
32d572e390 workqueue: add CONFIG_BOOTPARAM_WQ_STALL_PANIC option 
Add a kernel config option to set the default value of
workqueue.panic_on_stall, similar to CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC,
CONFIG_BOOTPARAM_HARDLOCKUP_PANIC and CONFIG_BOOTPARAM_HUNG_TASK_PANIC.

This allows setting the number of workqueue stalls before triggering
a kernel panic at build time, which is useful for high-availability
systems that need consistent panic-on-stall, in other words, those
servers which run with CONFIG_BOOTPARAM_*_PANIC=y already.

The default remains 0 (disabled). Setting it to 1 will panic on the
first stall, and higher values will panic after that many stall
warnings. The value can still be overridden at runtime via the
workqueue.panic_on_stall boot parameter or sysfs.

Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2026-02-03 09:37:59 -10:00
Pnina Feder
2e171ab29f panic: add panic_force_cpu= parameter to redirect panic to a specific CPU 
Some platforms require panic handling to execute on a specific CPU for
crash dump to work reliably.  This can be due to firmware limitations,
interrupt routing constraints, or platform-specific requirements where
only a single CPU is able to safely enter the crash kernel.

Add the panic_force_cpu= kernel command-line parameter to redirect panic
execution to a designated CPU.  When the parameter is provided, the CPU
that initially triggers panic forwards the panic context to the target CPU
via IPI, which then proceeds with the normal panic and kexec flow.

The IPI delivery is implemented as a weak function
(panic_smp_redirect_cpu) so architectures with NMI support can override it
for more reliable delivery.

If the specified CPU is invalid, offline, or a panic is already in
progress on another CPU, the redirection is skipped and panic continues on
the current CPU.

[pnina.feder@mobileye.com: fix unused variable warning]
  Link: https://lkml.kernel.org/r/20260126122618.2967950-1-pnina.feder@mobileye.com
Link: https://lkml.kernel.org/r/20260122102457.1154599-1-pnina.feder@mobileye.com
Signed-off-by: Pnina Feder <pnina.feder@mobileye.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-02-03 08:21:26 -08:00
Peter Zijlstra
3e4067169c Linux 6.19-rc8 
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Merge branch 'v6.19-rc8'

Update to avoid conflicts with /urgent patches.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
 2026-02-03 12:04:13 +01:00
Li Chen
1a47837bfa Documentation: document liveupdate cmdline parameter 
liveupdate is used to enable Live Update Orchestrator (LUO) early during
boot.  Add it to kernel-parameters.txt so users can discover and use it.

Link: https://lkml.kernel.org/r/20260130112036.359806-1-me@linux.beauty
Signed-off-by: Li Chen <me@linux.beauty>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "Borislav Petkov (AMD)" <bp@alien8.de>
Cc: Frank van der Linden <fvdl@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kees Cook <kees@kernel.org>
Cc: Li RongQing <lirongqing@baidu.com>
Cc: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Pratyush Yadav <ptyadav@amazon.de>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-02-02 18:43:56 -08:00
David Howells
0ad9a71933 modsign: Enable ML-DSA module signing 
Allow ML-DSA module signing to be enabled.

Note that OpenSSL's CMS_*() function suite does not, as of OpenSSL-3.6,
support the use of CMS_NOATTR with ML-DSA, so the prohibition against using
signedAttrs with module signing has to be removed.  The selected digest
then applies only to the algorithm used to calculate the digest stored in
the messageDigest attribute.  The OpenSSL development branch has patches
applied that fix this[1], but it appears that that will only be available
in OpenSSL-4.

[1] https://github.com/openssl/openssl/pull/28923

sign-file won't set CMS_NOATTR if openssl is earlier than v4, resulting in
the use of signed attributes.

The ML-DSA algorithm takes the raw data to be signed without regard to what
digest algorithm is specified in the CMS message.  The CMS specified digest
algorithm is ignored unless signedAttrs are used; in such a case, only
SHA512 is permitted.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Jarkko Sakkinen <jarkko@kernel.org>
cc: Eric Biggers <ebiggers@kernel.org>
cc: Lukas Wunner <lukas@wunner.de>
cc: Ignat Korchagin <ignat@cloudflare.com>
cc: Stephan Mueller <smueller@chronox.de>
cc: Herbert Xu <herbert@gondor.apana.org.au>
cc: keyrings@vger.kernel.org
cc: linux-crypto@vger.kernel.org
 2026-02-02 16:57:39 +00:00
Rhys Tumelty
78a00cac1e docs: fix 're-use' -> 'reuse' in documentation 
Signed-off-by: Rhys Tumelty <rhys@tumelty.co.uk>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260128220233.179439-1-rhys@tumelty.co.uk>
 2026-02-02 09:54:15 -07:00
SeongJae Park
652fd06d20 Docs/admin-guide/mm/damon/usage: update stats update process for refresh_ms 
DAMOS stats on sysfs was only manually updated.  Recent addition of
'refresh_ms' knob enabled periodic and automated updates of the stats. 
The document for stats update process is not updated for the change,
however.  Update.

Link: https://lkml.kernel.org/r/20260118180305.70023-7-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-01-31 14:22:48 -08:00
SeongJae Park
e7df7a0bfc Docs/admin-guide/mm/damon/usage: introduce DAMON modules at the beginning 
DAMON usage document provides a list of available DAMON interfaces with
brief introduction at the beginning of the doc.  The list is missing DAMON
modules for special purposes, while it is one of the major suggested
interfaces.  Add an item for those to the list.

Link: https://lkml.kernel.org/r/20260118180305.70023-6-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-01-31 14:22:48 -08:00
David Hildenbrand (Red Hat)
cd8e95d80b mm: rename CONFIG_BALLOON_COMPACTION to CONFIG_BALLOON_MIGRATION 
While compaction depends on migration, the other direction is not the
case.  So let's make it clearer that this is all about migration of
balloon pages.

Adjust all comments/docs in the core to talk about "migration" instead of
"compaction".

While at it add some "/* CONFIG_BALLOON_MIGRATION */".

Link: https://lkml.kernel.org/r/20260119230133.3551867-23-david@kernel.org
Signed-off-by: David Hildenbrand (Red Hat) <david@kernel.org>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Eugenio Pérez <eperezma@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Jerrin Shaji George <jerrin.shaji-george@broadcom.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: SeongJae Park <sj@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-01-31 14:22:36 -08:00
Christoph Hellwig
2d263debd7 xfs: allow setting errortags at mount time 
Add an errortag mount option that enables an errortag with the default
injection frequency.  This allows injecting errors into the mount
process instead of just on live file systems, and thus test mount
error handling.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hans Holmberg <hans.holmberg@wdc.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
 2026-01-30 10:41:42 +01:00
Nayna Jain
1d72a02d65 docs: trusted-encryped: add PKWM as a new trust source 
Update Documentation/security/keys/trusted-encrypted.rst and Documentation/
admin-guide/kernel-parameters.txt with PowerVM Key Wrapping Module (PKWM)
as a new trust source

Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
Signed-off-by: Srish Srinivasan <ssrish@linux.ibm.com>
Tested-by: Nayna Jain <nayna@linux.ibm.com>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260127145228.48320-7-ssrish@linux.ibm.com
 2026-01-30 09:27:27 +05:30
Jakub Kicinski
a010fe8d86 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 
Cross-merge networking fixes after downstream PR (net-6.19-rc8).

No adjacent changes, conflicts:

drivers/net/ethernet/spacemit/k1_emac.c
  2c84959167 ("net: spacemit: Check for netif_carrier_ok() in emac_stats_update()")
  f66086798f ("net: spacemit: Remove broken flow control support")
https://lore.kernel.org/aXjAqZA3iEWD_DGM@sirena.org.uk

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-01-29 17:28:54 -08:00
Deepak Gupta
c9b859c4d8 riscv: add kernel command line option to opt out of user CFI 
Add a kernel command line option to disable part or all
of user CFI.  User backward CFI and forward CFI can be controlled
independently.  The kernel command line parameter "riscv_nousercfi" can
take the following values:
 - "all" : Disable forward and backward cfi both
 - "bcfi" : Disable backward cfi
 - "fcfi" : Disable forward cfi

Signed-off-by: Deepak Gupta <debug@rivosinc.com>
Tested-by: Andreas Korb <andreas.korb@aisec.fraunhofer.de> # QEMU, custom CVA6
Tested-by: Valentin Haudiquet <valentin.haudiquet@canonical.com>
Link: https://patch.msgid.link/20251112-v5_user_cfi_series-v23-21-b55691eacf4f@rivosinc.com
[pjw@kernel.org: fixed warnings from checkpatch; cleaned up patch description, doc, printk text]
Signed-off-by: Paul Walmsley <pjw@kernel.org>
 2026-01-29 02:38:40 -07:00
SeongJae Park
ed581147a4 Docs/admin-guide/mm/damon/lru_sort: document intervals autotuning 
Document a newly added DAMON_LRU_SORT module parameter for using
monitoring intervals auto-tuning feature of DAMON.

Link: https://lkml.kernel.org/r/20260113152717.70459-12-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Acked-by: wang lian <lianux.mm@gmail.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-01-26 20:02:31 -08:00
SeongJae Park
cdfca22d15 Docs/admin-guide/mm/damon/lru_sort: document active_mem_bp parameter 
Document a newly added DAMON_LRU_SORT parameter for doing auto-tuning
aiming an active to inactive memory size ratio.

Link: https://lkml.kernel.org/r/20260113152717.70459-10-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Acked-by: wang lian <lianux.mm@gmail.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-01-26 20:02:31 -08:00
SeongJae Park
b36aefb866 Docs/admin-guide/mm/damon/lru_sort: document filter_young_pages 
Document the new DAMON_LRU_SORT parameter, filter_young_pages.  It can be
used to use page level access re-check for the LRU sorting.

Link: https://lkml.kernel.org/r/20260113152717.70459-8-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Acked-by: wang lian <lianux.mm@gmail.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-01-26 20:02:30 -08:00
Greg Thelen
0bec75167d memcg-v1: remove folio_memcg_lock() doc reference 
Commit a29c0e4b2e ("memcg-v1: remove memcg move locking code") removed
folio_memcg_lock().  Delete the final lingering documentation reference.

Link: https://lkml.kernel.org/r/20260101225552.3423108-1-gthelen@google.com
Fixes: a29c0e4b2e ("memcg-v1: remove memcg move locking code")
Signed-off-by: Greg Thelen <gthelen@google.com>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: SeongJae Park <sj@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: "Michal Koutný" <mkoutny@suse.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-01-26 20:02:20 -08:00
Linus Torvalds
fcb70a56f4 vfs-6.19-rc8.fixes 
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Merge tag 'vfs-6.19-rc8.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs fixes from Christian Brauner:

 - Fix the the buggy conversion of fuse_reverse_inval_entry() introduced
   during the creation rework

 - Disallow nfs delegation requests for directories by setting
   simple_nosetlease()

 - Require an opt-in for getting readdir flag bits outside of S_DT_MASK
   set in d_type

 - Fix scheduling delayed writeback work by only scheduling when the
   dirty time expiry interval is non-zero and cancel the delayed work if
   the interval is set to zero

 - Use rounded_jiffies_interval for dirty time work

 - Check the return value of sb_set_blocksize() for romfs

 - Wait for batched folios to be stable in __iomap_get_folio()

 - Use private naming for fuse hash size

 - Fix the stale dentry cleanup to prevent a race that causes a UAF

* tag 'vfs-6.19-rc8.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  vfs: document d_dispose_if_unused()
  fuse: shrink once after all buckets have been scanned
  fuse: clean up fuse_dentry_tree_work()
  fuse: add need_resched() before unlocking bucket
  fuse: make sure dentry is evicted if stale
  fuse: fix race when disposing stale dentries
  fuse: use private naming for fuse hash size
  writeback: use round_jiffies_relative for dirtytime_work
  iomap: wait for batched folios to be stable in __iomap_get_folio
  romfs: check sb_set_blocksize() return value
  docs: clarify that dirtytime_expire_seconds=0 disables writeback
  writeback: fix 100% CPU usage when dirtytime_expire_interval is 0
  readdir: require opt-in for d_type flags
  vboxsf: don't allow delegations to be set on directories
  ceph: don't allow delegations to be set on directories
  gfs2: don't allow delegations to be set on directories
  9p: don't allow delegations to be set on directories
  smb/client: properly disallow delegations on directories
  nfs: properly disallow delegation requests on directories
  fuse: fix conversion of fuse_reverse_inval_entry() to start_removing()
 2026-01-26 09:30:48 -08:00
Ilpo Järvinen
6343e06788
Merge branch 'fixes' of into for-next 2026-01-26 15:42:44 +02:00
Greg Kroah-Hartman
dbd91d4f55 Merge 6.19-rc7 into char-misc-next 
We need the char/misc/iio fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2026-01-26 12:04:04 +01:00
Eric Dumazet
37b0ea8fef net: expand NETDEV_RSS_KEY_LEN to 256 bytes 
NETDEV_RSS_KEY_LEN has been set to 52 bytes in 2014, until now.

Jakub suggested we bump the size to 128 bytes or more.

Some drivers (like idpf) were already working around the core limit.

Since this change might cause some issues in admin scripts,
bump it directly to 256 in one go.

tjbp26:~# cat /proc/sys/net/core/netdev_rss_key | wc -c
768

tjbp26:~# ethtool -x eth1
RX flow hash indirection table for eth1 with 32 RX ring(s):
...
RSS hash key:
fe:16:5b:2f:93:85:c2:c9:c1:ef:bd:60:c6:e0:2b:99:4d:bf:b7:14:c8:1e:8d:cb:31:17:51:da:55:eb:91:d9:9e:f9:89:9b:44:a1:dc:08:72:3a:b3:d6:31:86:9a:fe:02:3a:0d:eb:a1:7c:f5:a3:51:3b:08:56:c9:3f:71:69:01:ba:70:38
RSS hash function:
    toeplitz: on
    xor: off
    crc32: off

Suggested-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/netdev/20260122075206.504ec591@kernel.org/
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20260122190349.2771064-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-01-25 13:20:46 -08:00
Linus Torvalds
2a4d91142e platform-drivers-x86 for v6.19-3 
Fixes and New HW Support
 
 - acer-wmi:
 
   - Extend support for Acer Nitro AN515-58
 
   - Fix missing capability check
 
 - amd/wbrf: Fix memory leak in wbrf_record()
 
 - asus-armoury:
 
   - Fix GA403U* matching
 
   - Fix FA608UM TDP data
 
   - Add many models
 
 - asus-wmi: Move OOBE presence check outside deprecation ifdef
 
 - docs:
 
   - alienware-wmi: Typo fix
 
   - amd_hsmp: Fix document link
 
 - hp-bioscfg:
 
   - Fix kernel panic in GET_INSTANCE_ID macro
 
   - Fix kobject warnings for empty attribute names
 
   - Correct GUID to uppercase (lowercase letter prevented autoloading
     the module)
 
 - mellanox: Fix SN5640/SN5610 LED platform data
 
 The following is an automated shortlog grouped by driver:
 
 acer-wmi:
  -  Extend support for Acer Nitro AN515-58
  -  Fix missing capability check
 
 amd:
  -  Fix memory leak in wbrf_record()
 
 asus-armoury:
  -  Add power limits for Asus G513QY
  -  add support for FA401UV
  -  add support for FA617XT
  -  add support for G835L
  -  add support for GA403UV
  -  add support for GA403WM
  -  add support for GA403WW
  -  add support for GV302XV
  -  fix ppt data for FA608UM
  -  fix ppt data for GA403U* renaming to GA403UI
  -  keep the list ordered alphabetically
 
 asus-wmi:
  -  fix sending OOBE at probe
 
 docs: alienware-wmi:
  -  fix typo
 
 docs:
  -  fix PPR for AMD EPYC broken link
 
 hp-bioscfg:
  -  Fix automatic module loading
  -  Fix kernel panic in GET_INSTANCE_ID macro
  -  Fix kobject warnings for empty attribute names
 
 mellanox:
  -  Fix SN5640/SN5610 LED platform data
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Merge tag 'platform-drivers-x86-v6.19-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

Pull x86 platform driver fixes from Ilpo Järvinen:

 - acer-wmi:
     - Extend support for Acer Nitro AN515-58
     - Fix missing capability check

 - amd/wbrf: Fix memory leak in wbrf_record()

 - asus-armoury:
     - Fix GA403U* matching
     - Fix FA608UM TDP data
     - Add many models

 - asus-wmi: Move OOBE presence check outside deprecation ifdef

 - hp-bioscfg:
     - Fix kernel panic in GET_INSTANCE_ID macro
     - Fix kobject warnings for empty attribute names
     - Correct GUID to uppercase (lowercase letter prevented autoloading
       the module)

 - mellanox: Fix SN5640/SN5610 LED platform data

 - docs:
     - alienware-wmi: Typo fix
     - amd_hsmp: Fix document link

* tag 'platform-drivers-x86-v6.19-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (21 commits)
  platform/x86: acer-wmi: Fix missing capability check
  platform/x86: acer-wmi: Extend support for Acer Nitro AN515-58
  platform/x86: asus-armoury: add support for GA403WW
  platform/x86: asus-armoury: keep the list ordered alphabetically
  platform/x86: asus-armoury: add support for G835L
  platform/x86: asus-armoury: fix ppt data for FA608UM
  platform/x86: hp-bioscfg: Fix automatic module loading
  platform/x86: hp-bioscfg: Fix kernel panic in GET_INSTANCE_ID macro
  platform/x86: hp-bioscfg: Fix kobject warnings for empty attribute names
  platform/x86: asus-wmi: fix sending OOBE at probe
  platform/x86: asus-armoury: add support for FA617XT
  platform/x86: asus-armoury: add support for FA401UV
  platform/x86: asus-armoury: add support for GV302XV
  platform/x86: asus-armoury: Add power limits for Asus G513QY
  platform/x86/amd: Fix memory leak in wbrf_record()
  platform/mellanox: Fix SN5640/SN5610 LED platform data
  docs: fix PPR for AMD EPYC broken link
  docs: alienware-wmi: fix typo
  platform/x86: asus-armoury: add support for GA403UV
  asus-armoury: fix ppt data for GA403U* renaming to GA403UI
  ...
 2026-01-23 13:16:26 -08:00
Jani Nikula
a592a36e49 Documentation: use a source-read extension for the index link boilerplate 
The root document usually has a special :ref:`genindex` link to the
generated index. This is also the case for Documentation/index.rst. The
other index.rst files deeper in the directory hierarchy usually don't.

For SPHINXDIRS builds, the root document isn't Documentation/index.rst,
but some other index.rst in the hierarchy. Currently they have a
".. only::" block to add the index link when doing SPHINXDIRS html
builds.

This is obviously very tedious and repetitive. The link is also added to
all index.rst files in the hierarchy for SPHINXDIRS builds, not just the
root document.

Put the boilerplate in a sphinx-includes/subproject-index.rst file, and
include it at the end of the root document for subproject builds in an
ad-hoc source-read extension defined in conf.py.

For now, keep having the boilerplate in translations, because this
approach currently doesn't cover translated index link headers.

Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Tested-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
[jc: did s/doctree/kern_doc_dir/ ]
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260123143149.2024303-1-jani.nikula@intel.com>
 2026-01-23 11:59:34 -07:00
Peter Zijlstra
e1d7f54900 rseq: Move slice_ext_nsec to debugfs 
Move changing the slice ext duration to debugfs, a sliglty less permanent
interface.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260121143207.923520192@infradead.org
 2026-01-22 11:11:20 +01:00
Thomas Gleixner
0ac3b5c3dc rseq: Implement time slice extension enforcement timer 
If a time slice extension is granted and the reschedule delayed, the kernel
has to ensure that user space cannot abuse the extension and exceed the
maximum granted time.

It was suggested to implement this via the existing hrtick() timer in the
scheduler, but that turned out to be problematic for several reasons:

   1) It creates a dependency on CONFIG_SCHED_HRTICK, which can be disabled
      independently of CONFIG_HIGHRES_TIMERS

   2) HRTICK usage in the scheduler can be runtime disabled or is only used
      for certain aspects of scheduling.

   3) The function is calling into the scheduler code and that might have
      unexpected consequences when this is invoked due to a time slice
      enforcement expiry. Especially when the task managed to clear the
      grant via sched_yield(0).

It would be possible to address #2 and #3 by storing state in the
scheduler, but that is extra complexity and fragility for no value.

Implement a dedicated per CPU hrtimer instead, which is solely used for the
purpose of time slice enforcement.

The timer is armed when an extension was granted right before actually
returning to user mode in rseq_exit_to_user_mode_restart().

It is disarmed, when the task relinquishes the CPU. This is expensive as
the timer is probably the first expiring timer on the CPU, which means it
has to reprogram the hardware. But that's less expensive than going through
a full hrtimer interrupt cycle for nothing.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://patch.msgid.link/20251215155709.068329497@linutronix.de
 2026-01-22 11:11:18 +01:00
Thomas Gleixner
f8380f9768 rseq: Provide static branch for time slice extensions 
Guard the time slice extension functionality with a static key, which can
be disabled on the kernel command line.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20251215155708.733429292@linutronix.de
 2026-01-22 11:11:16 +01:00
Tejun Heo
0ff6402de7 cgroup: Remove stale cpu.rt.max reference from documentation 
cpu.rt.max was a proposed interface that never landed in mainline. Remove the
reference from cgroup-v2 documentation.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Orestis Floros <orestisflo@gmail.com>
 2026-01-21 14:24:59 -10:00
Li RongQing
e700f5d156 watchdog: softlockup: panic when lockup duration exceeds N thresholds 
The softlockup_panic sysctl is currently a binary option: panic
immediately or never panic on soft lockups.

Panicking on any soft lockup, regardless of duration, can be overly
aggressive for brief stalls that may be caused by legitimate operations. 
Conversely, never panicking may allow severe system hangs to persist
undetected.

Extend softlockup_panic to accept an integer threshold, allowing the
kernel to panic only when the normalized lockup duration exceeds N
watchdog threshold periods.  This provides finer-grained control to
distinguish between transient delays and persistent system failures.

The accepted values are:
- 0: Don't panic (unchanged)
- 1: Panic when duration >= 1 * threshold (20s default, original behavior)
- N > 1: Panic when duration >= N * threshold (e.g., 2 = 40s, 3 = 60s.)

The original behavior is preserved for values 0 and 1, maintaining full
backward compatibility while allowing systems to tolerate brief lockups
while still catching severe, persistent hangs.

[lirongqing@baidu.com: v2]
  Link: https://lkml.kernel.org/r/20251218074300.4080-1-lirongqing@baidu.com
Link: https://lkml.kernel.org/r/20251216074521.2796-1-lirongqing@baidu.com
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: KP Singh <kpsingh@kernel.org>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Martin KaFai Lau <martin.lau@linux.dev>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Song Liu <song@kernel.org>
Cc: Stanislav Fomichev <sdf@fomichev.me>
Cc: Yonghong Song <yonghong.song@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-01-20 19:44:20 -08:00
Gregory Price
9e80e66dda mm, hugetlb: implement movable_gigantic_pages sysctl 
This reintroduces a concept removed by: commit d6cb41cc44 ("mm, hugetlb:
remove hugepages_treat_as_movable sysctl")

This sysctl provides flexibility between ZONE_MOVABLE use cases:
1) onlining memory in ZONE_MOVABLE to maintain hotplug compatibility
2) onlining memory in ZONE_MOVABLE to make hugepage allocate reliable

When ZONE_MOVABLE is used to make huge page allocation more reliable,
disallowing gigantic pages memory in this region is pointless.  If hotplug
is not a requirement, we can loosen the restrictions to allow 1GB gigantic
pages in ZONE_MOVABLE.

Since 1GB can be difficult to migrate / has impacts on compaction /
defragmentation, we don't enable this by default.  Notably, 1GB pages can
only be migrated if another 1GB page is available - so hot-unplug will
fail if such a page cannot be found.

However, since there are scenarios where gigantic pages are migratable, we
should allow use of these on movable regions.

When not valid 1GB is available for migration, hot-unplug will retry
indefinitely (or until interrupted).  For example:

  echo 0 > node0/hugepages/..-1GB/nr_hugepages  # clear node0 1GB pages
  echo 1 > node1/hugepages/..-1GB/nr_hugepages  # reserve node1 1GB page
  ./alloc_huge_node1 &    # Allocate a 1GB page on node1
  ./node1_offline  &      # attempt to offline all node1 memory
  echo 1 > node0/hugepages/..-1GB/nr_hugepages  # reserve node0 1GB page

In this example, node1_offline will block indefinitely until the final
step, when a node0 1GB page is made available.

Note: Boot-time CMA is not possible for driver-managed hotplug memory, as
CMA requires the memory to be registered as SystemRAM at boot time. 
Additionally, 1GB huge pages are not supported by THP.

Link: https://lkml.kernel.org/r/20251221125603.2364174-1-gourry@gourry.net
Signed-off-by: Gregory Price <gourry@gourry.net>
Suggested-by: David Rientjes <rientjes@google.com>
Link: https://lore.kernel.org/all/20180201193132.Hk7vI_xaU%25akpm@linux-foundation.org/
Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "David Hildenbrand (Red Hat)" <david@kernel.org>
Cc: Gregory Price <gourry@gourry.net>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-01-20 19:24:50 -08:00
Johannes Weiner
64dd89ae01 mm/block/fs: remove laptop_mode 
Laptop mode was introduced to save battery, by delaying and consolidating
writes and thereby maximize the time rotating hard drives wouldn't have to
spin.

Luckily, rotating hard drives, with their high spin-up times and power
draw, are a thing of the past for battery-powered devices.  Reclaim has
also since changed to not write single filesystem pages anymore, and
regular filesystem writeback is lumpy by design.

The juice doesn't appear worth the squeeze anymore.  The footprint of the
feature is small, but nevertheless it's a complicating factor in mm,
block, filesystems.  Developers don't think about it, and it likely hasn't
been tested with new reclaim and writeback changes in years.

Let's sunset it.  Keep the sysctl with a deprecation warning around for a
few more cycles, but remove all functionality behind it.

[akpm@linux-foundation.org: fix Documentation/admin-guide/laptops/index.rst]
Link: https://lkml.kernel.org/r/20251216185201.GH905277@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Suggested-by: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Deepanshu Kartikey <kartikey406@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-01-20 19:24:47 -08:00
SeongJae Park
2584dd7496 Docs/admin-guide/mm/damon/usage: update for max_nr_snapshots 
Update DAMON usage document for the newly added DAMON sysfs interface
file, max_nr_snapshots.

Link: https://lkml.kernel.org/r/20251216080128.42991-11-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-01-20 19:24:45 -08:00
SeongJae Park
0b43f89e2d Docs/admin-guide/mm/damon/usage: update for nr_snapshots damos stat 
Update DAMON usage document for the newly added damos stat, nr_snapshots.

Link: https://lkml.kernel.org/r/20251216080128.42991-5-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-01-20 19:24:44 -08:00
Sergey Senozhatsky
2502673aed zram: document writeback_batch_size 
Add missing writeback_batch_size documentation.

Link: https://lkml.kernel.org/r/20251201094754.4149975-4-senozhatsky@chromium.org
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Brian Geffon <bgeffon@google.com>
Cc: David Stevens <stevensd@google.com>
Cc: Minchan Kim <minchan@google.com>
Cc: Richard Chang <richardycc@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-01-20 19:24:36 -08:00
Richard Chang
4c1d61389e zram: introduce writeback_compressed device attribute 
Introduce witeback_compressed device attribute to toggle compressed
writeback (decompression on demand) feature.

[senozhatsky@chromium.org: rewrote original patch, added documentation]
Link: https://lkml.kernel.org/r/20251201094754.4149975-3-senozhatsky@chromium.org
Signed-off-by: Richard Chang <richardycc@google.com>
Co-developed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Brian Geffon <bgeffon@google.com>
Cc: David Stevens <stevensd@google.com>
Cc: Minchan Kim <minchan@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-01-20 19:24:36 -08:00
Suren Baghdasaryan
cb7d761bf5 Docs/mm/allocation-profiling: describe sysctrl limitations in debug mode 
When CONFIG_MEM_ALLOC_PROFILING_DEBUG=y, /proc/sys/vm/mem_profiling is
read-only to avoid debug warnings in a scenario when an allocation is
made while profiling is disabled (allocation does not get an allocation
tag), then profiling gets enabled and allocation gets freed (warning due
to the allocation missing allocation tag).

Link: https://lkml.kernel.org/r/20260116184423.2708363-1-surenb@google.com
Fixes: ebdf9ad4ca ("memprofiling: documentation")
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Acked-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Ran Xiaokai <ran.xiaokai@zte.com.cn>
Cc: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-01-20 09:34:26 -08:00
Christian Brauner
033724b1c6 dm-verity: add dm-verity keyring 
Add a dedicated ".dm-verity" keyring for root hash signature
verification, similar to the ".fs-verity" keyring used by fs-verity.

By default the keyring is unused retaining the exact same old behavior.
For systems that provision additional keys only intended for dm-verity
images during boot, the dm_verity.keyring_unsealed=1 kernel parameter
leaves the keyring open.

We want to use this in systemd as a way add keys during boot that are
only used for creating dm-verity devices for later mounting and nothing
else. The discoverable disk image (DDI) spec at [1] heavily relies on
dm-verity and we would like to expand this even more. This will allow us
to do that in a fully backward compatible way.

Once provisioning is complete, userspace restricts and activates it for
dm-verity verification. If userspace fully seals the keyring then it
gains the guarantee that no new keys can be added.

Link: https://uapi-group.org/specifications/specs/discoverable_partitions_specification [1]
Co-developed-by: Aleksa Sarai <cyphar@cyphar.com>
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
 2026-01-19 15:21:10 +01:00
Shenghao Yang
2a11e1479e x86/acpi: Add acpi=spcr to use SPCR-provided default console 
The SPCR provided console on x86 is only available as a boot console when
earlycon is provided on the kernel command line, and will not be present in
/proc/consoles.

While it's possible to retain the boot console with the keep_bootcon
parameter, that leaves the console using the less efficient 8250_early driver.

Users wanting to use the firmware suggested console (to avoid maintaining
unique serial console parameters for different server models in large fleets)
with the conventional driver have to parse the kernel log for the console
parameters and reinsert them.

  [    0.005091] ACPI: SPCR 0x000000007FFB5000 000059 (v04 ALASKA A M I    01072009 INTL 20250404)
  [    0.073387] ACPI: SPCR: console: uart,io,0x3f8,115200

In commit

  0231d00082 ("ACPI: SPCR: Make SPCR available to x86")¹

the SPCR console was only added as an option for earlycon but not as an
ordinary console so users don't see console output changes.

So users can opt in to an automatic SPCR console, make ACPI init add it if
acpi=spcr is set.

¹https://lore.kernel.org/lkml/20180118150951.28964-1-prarit@redhat.com/

  [ bp: Touchups. ]

Signed-off-by: Shenghao Yang <me@shenghaoyang.info>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/20260117072827.355360-1-me@shenghaoyang.info
 2026-01-17 17:43:21 +01:00
Martin Tůma
eb4ee87074 Documentation: admin-guide: media: mgb4: Add GMSL1 & GMSL3-coax modules info 
Add the mgb4 GMSL1 and GMSL3-coax modules info.

Signed-off-by: Martin Tůma <martin.tuma@digiteqautomotive.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
 2026-01-17 09:08:02 +01:00
Marc Herbert
d9d25684e9 docs: make kptr_restrict and hash_pointers reference each other 
vsprintf.c uses a mix of the `kernel.kptr_restrict` sysctl and the
`hash_pointers` boot param to control pointer hashing. But that wasn't
possible to tell without looking at the source code.

They have a different focus and purpose. To avoid wasting the time of
users trying to use one instead of the other, simply have them reference
each other in the Documentation.

Signed-off-by: Marc Herbert <marc.herbert@linux.intel.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260107-doc-hash-ptr-v2-1-cb4c161218d7@linux.intel.com>
 2026-01-16 11:31:58 -07:00
Nauman Sabir
8913632998 Documentation: Fix typos and grammatical errors 
Fix various typos and grammatical errors across documentation files:

- Fix missing preposition 'in' in process/changes.rst
- Correct 'result by' to 'result from' in admin-guide/README.rst
- Fix 'before hand' to 'beforehand' in cgroup-v1/hugetlb.rst
- Correct 'allows to limit' to 'allows limiting' in hugetlb.rst,
  cgroup-v2.rst, and kconfig-language.rst
- Fix 'needs precisely know' to 'needs to precisely know'
- Correct 'overcommited' to 'overcommitted' in hugetlb.rst
- Fix subject-verb agreement: 'never causes' to 'never cause'
- Fix 'there is enough' to 'there are enough' in hugetlb.rst
- Fix 'metadatas' to 'metadata' in filesystems/erofs.rst
- Fix 'hardwares' to 'hardware' in scsi/ChangeLog.sym53c8xx

Signed-off-by: Nauman Sabir <officialnaumansabir@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Message-ID: <20260115230110.7734-1-officialnaumansabir@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
 2026-01-16 11:13:45 -07:00
Linus Torvalds
13b2d15d99 32 hotfixes. 16 are cc:stable, 24 are for MM. 
- four kerneldoc fixes from Bagas Sanjaya
 
 - four DAMON fixes from SeongJae
 
 - four mremap VMA-related fixes from Lorenzo
 
 - various singletons - please see the changelogs for details
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Merge tag 'mm-hotfixes-stable-2026-01-15-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc fixes from Andrew Morton:

 - kerneldoc fixes from Bagas Sanjaya

 - DAMON fixes from SeongJae

 - mremap VMA-related fixes from Lorenzo

 - various singletons - please see the changelogs for details

* tag 'mm-hotfixes-stable-2026-01-15-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (30 commits)
  drivers/dax: add some missing kerneldoc comment fields for struct dev_dax
  mm: numa,memblock: include <asm/numa.h> for 'numa_nodes_parsed'
  mailmap: add entry for Daniel Thompson
  tools/testing/selftests: fix gup_longterm for unknown fs
  mm/page_alloc: prevent pcp corruption with SMP=n
  iommu/sva: include mmu_notifier.h header
  mm: kmsan: fix poisoning of high-order non-compound pages
  tools/testing/selftests: add forked (un)/faulted VMA merge tests
  mm/vma: enforce VMA fork limit on unfaulted,faulted mremap merge too
  tools/testing/selftests: add tests for !tgt, src mremap() merges
  mm/vma: fix anon_vma UAF on mremap() faulted, unfaulted merge
  mm/zswap: fix error pointer free in zswap_cpu_comp_prepare()
  mm/damon/sysfs-scheme: cleanup access_pattern subdirs on scheme dir setup failure
  mm/damon/sysfs-scheme: cleanup quotas subdirs on scheme dir setup failure
  mm/damon/sysfs: cleanup attrs subdirs on context dir setup failure
  mm/damon/sysfs: cleanup intervals subdirs on attrs dir setup failure
  mm/damon/core: remove call_control in inactive contexts
  powerpc/watchdog: add support for hardlockup_sys_info sysctl
  mips: fix HIGHMEM initialization
  mm/hugetlb: ignore hugepage kernel args if hugepages are unsupported
  ...
 2026-01-15 10:47:14 -08:00
Nitin Joshi
a85503d541
platform/x86: thinkpad_acpi: Add sysfs to display details of damaged device. 
Add new sysfs interface to identify the impacted component with location of
device.

Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Signed-off-by: Nitin Joshi <nitjoshi@gmail.com>
Link: https://patch.msgid.link/20260106174519.6402-2-nitjoshi@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
 2026-01-15 11:10:31 +02:00
Nitin Joshi
28c43bddd0
platform/x86: thinkpad_acpi: Add support to detect hardware damage detection capability. 
Thinkpads are adding the ability to detect and report hardware damage
status. Add new sysfs interface to identify whether hardware damage
is detected or not.

Initial support is available for the USB-C replaceable connector.

Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Signed-off-by: Nitin Joshi <nitjoshi@gmail.com>
Link: https://patch.msgid.link/20260106174519.6402-1-nitjoshi@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
 2026-01-15 11:07:35 +02:00
Marco Elver
6ac166a0c8 docs: kernel-parameters: add kfence parameters 
Add a brief summary for KFENCE's kernel command-line parameters in
admin-guide/kernel-parameters.

Link: https://lkml.kernel.org/r/20251222150018.1349672-1-elver@google.com
Signed-off-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2026-01-14 22:16:20 -08:00
Stefano Stabellini
763baca7bf xen: introduce xen_console_io option 
Xen can support console_io hypercalls for any domains, not just dom0,
depending on DEBUG and XSM policies. These hypercalls can be very useful
for development and debugging.

Introduce a kernel command line option xen_console_io to enable the
usage of console_io hypercalls for any domain upon request. When
xen_console_io is not specified, the current behavior is retained.

Signed-off-by: Stefano Stabellini <stefano.stabellini@amd.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Message-ID: <alpine.DEB.2.22.394.2601131522540.992863@ubuntu-linux-20-04-desktop>
 2026-01-14 14:43:57 +01:00
Eric Dumazet
ffe4ccd359 net: add net.core.qdisc_max_burst 
In blamed commit, I added a check against the temporary queue
built in __dev_xmit_skb(). Idea was to drop packets early,
before any spinlock was acquired.

if (unlikely(defer_count > READ_ONCE(q->limit))) {
	kfree_skb_reason(skb, SKB_DROP_REASON_QDISC_DROP);
	return NET_XMIT_DROP;
}

It turned out that HTB Qdisc has a zero q->limit.
HTB limits packets on a per-class basis.
Some of our tests became flaky.

Add a new sysctl : net.core.qdisc_max_burst to control
how many packets can be stored in the temporary lockless queue.

Also add a new QDISC_BURST_DROP drop reason to better diagnose
future issues.

Thanks Neal !

Fixes: 100dfa74ca ("net: dev_queue_xmit() llist adoption")
Reported-and-bisected-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Neal Cardwell <ncardwell@google.com>
Link: https://patch.msgid.link/20260107104159.3669285-1-edumazet@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
 2026-01-13 10:12:11 +01:00
Waiman Long
2a3602030d cgroup/cpuset: Don't invalidate sibling partitions on cpuset.cpus conflict 
Currently, when setting a cpuset's cpuset.cpus to a value that conflicts
with the cpuset.cpus/cpuset.cpus.exclusive of a sibling partition,
the sibling's partition state becomes invalid. This is overly harsh and
is probably not necessary.

The cpuset.cpus.exclusive control file, if set, will override the
cpuset.cpus of the same cpuset when creating a cpuset partition.
So cpuset.cpus has less priority than cpuset.cpus.exclusive in setting up
a partition.  However, it cannot override a conflicting cpuset.cpus file
in a sibling cpuset and the partition creation process will fail. This
is inconsistent.  That will also make using cpuset.cpus.exclusive less
valuable as a tool to set up cpuset partitions as the users have to
check if such a cpuset.cpus conflict exists or not.

Fix these problems by making sure that once a cpuset.cpus.exclusive
is set without failure, it will always be allowed to form a valid
partition as long as at least one CPU can be granted from its parent
irrespective of the state of the siblings' cpuset.cpus values. Of
course, setting cpuset.cpus.exclusive will fail if it conflicts with
the cpuset.cpus.exclusive or the cpuset.cpus.exclusive.effective value
of a sibling.

Partition can still be created by setting only cpuset.cpus without
setting cpuset.cpus.exclusive. However, any conflicting CPUs in sibling's
cpuset.cpus.exclusive.effective and cpuset.cpus.exclusive values will
be removed from its cpuset.cpus.exclusive.effective as long as there
is still one or more CPUs left and can be granted from its parent. This
CPU stripping is currently done in rm_siblings_excl_cpus().

The new code will now try its best to enable the creation of new
partitions with only cpuset.cpus set without invalidating existing ones.
However it is not guaranteed that all the CPUs requested in cpuset.cpus
will be used in the new partition even when all these CPUs can be
granted from the parent.

This is similar to the fact that cpuset.cpus.effective may not be
able to include all the CPUs requested in cpuset.cpus. In this case,
the parent may not able to grant all the exclusive CPUs requested in
cpuset.cpus to cpuset.cpus.exclusive.effective if some of them have
already been granted to other partitions earlier.

With the creation of multiple sibling partitions by setting
only cpuset.cpus, this does have the side effect that their exact
cpuset.cpus.exclusive.effective settings will depend on the order of
partition creation if there are conflicts. Due to the exclusive nature
of the CPUs in a partition, it is not easy to make it fair other than
the old behavior of invalidating all the conflicting partitions.

For example,
  # echo "0-2" > A1/cpuset.cpus
  # echo "root" > A1/cpuset.cpus.partition
  # cat A1/cpuset.cpus.partition
  root
  # cat A1/cpuset.cpus.exclusive.effective
  0-2
  # echo "2-4" > B1/cpuset.cpus
  # echo "root" > B1/cpuset.cpus.partition
  # cat B1/cpuset.cpus.partition
  root
  # cat B1/cpuset.cpus.exclusive.effective
  3-4
  # cat B1/cpuset.cpus.effective
  3-4

For users who want to be sure that they can get most of the CPUs they
want, cpuset.cpus.exclusive should be used instead if they can set
it successfully without failure. Setting cpuset.cpus.exclusive will
guarantee that sibling conflicts from then onward is no longer possible.

To make this change, we have to separate out the is_cpu_exclusive()
check in cpus_excl_conflict() into a cgroup v1 only
cpuset1_cpus_excl_conflict() helper. The cpus_allowed_validate_change()
helper is now no longer needed and can be removed.

Some existing tests in test_cpuset_prs.sh are updated and new ones are
added to reflect the new behavior. The cgroup-v2.rst doc file is also
updated the clarify what exclusive CPUs will be used when a partition
is created.

Reported-by: Sun Shaojie <sunshaojie@kylinos.cn>
Closes: https://lore.kernel.org/lkml/20251117015708.977585-1-sunshaojie@kylinos.cn/
Signed-off-by: Waiman Long <longman@redhat.com>
Reviewed-by: Chen Ridong <chenridong@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2026-01-12 09:02:46 -10:00
Waiman Long
6e6f13f6d5 cgroup/cpuset: Don't fail cpuset.cpus change in v2 
Commit fe8cd2736e ("cgroup/cpuset: Delay setting of CS_CPU_EXCLUSIVE
until valid partition") introduced a new check to disallow the setting
of a new cpuset.cpus.exclusive value that is a superset of a sibling's
cpuset.cpus value so that there will at least be one CPU left in the
sibling in case the cpuset becomes a valid partition root. This new
check does have the side effect of failing a cpuset.cpus change that
make it a subset of a sibling's cpuset.cpus.exclusive value.

With v2, users are supposed to be allowed to set whatever value they
want in cpuset.cpus without failure. To maintain this rule, the check
is now restricted to only when cpuset.cpus.exclusive is being changed
not when cpuset.cpus is changed.

The cgroup-v2.rst doc file is also updated to reflect this change.

Signed-off-by: Waiman Long <longman@redhat.com>
Reviewed-by: Chen Ridong <chenridong@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2026-01-12 09:02:14 -10:00
Petr Vorel
829656c3e2 Documentation: bug-hunting.rst: Remove wrong 'file:' syntax 
Link to another document does not require 'file:', therefore it was
shown in generated html.

Preformatted text requires just ``...``.

Signed-off-by: Petr Vorel <pvorel@suse.cz>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260111223643.174812-1-pvorel@suse.cz>
 2026-01-12 09:31:19 -07:00
Askar Safin
e6ce36ccc8
init: remove /proc/sys/kernel/real-root-dev 
It is not used anymore.

Signed-off-by: Askar Safin <safinaskar@gmail.com>
Link: https://patch.msgid.link/20251119222407.3333257-4-safinaskar@gmail.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>
 2026-01-12 17:22:27 +01:00
Askar Safin
c350a65b56
initrd: remove deprecated code path (linuxrc) 
Remove linuxrc initrd code path, which was deprecated in 2020.

Initramfs and (non-initial) RAM disks (i. e. brd) still work.

Both built-in and bootloader-supplied initramfs still work.

Non-linuxrc initrd code path (i. e. using /dev/ram as final root
filesystem) still works, but I put deprecation message into it.

Also I deprecate command line parameters "noinitrd" and "ramdisk_start=".

Signed-off-by: Askar Safin <safinaskar@gmail.com>
Link: https://patch.msgid.link/20251119222407.3333257-3-safinaskar@gmail.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>
 2026-01-12 17:22:22 +01:00
Laveesh Bansal
30ef9a20f1
docs: clarify that dirtytime_expire_seconds=0 disables writeback 
Document that setting vm.dirtytime_expire_seconds to zero disables
periodic dirtytime writeback, matching the behavior of the related
dirty_writeback_centisecs sysctl which already documents this.

Signed-off-by: Laveesh Bansal <laveeshb@laveeshbansal.com>
Link: https://patch.msgid.link/20260106145059.543282-3-laveeshb@laveeshbansal.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
 2026-01-12 11:07:25 +01:00
Mostafa Saleh
466ae6978a iommu: Add page_ext for IOMMU_DEBUG_PAGEALLOC 
Add a new config IOMMU_DEBUG_PAGEALLOC, which registers new data to
page_ext.

This config will be used by the IOMMU API to track pages mapped in
the IOMMU to catch drivers trying to free kernel memory that they
still map in their domains, causing all types of memory corruption.

This behaviour is disabled by default and can be enabled using
kernel cmdline iommu.debug_pagealloc.

Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>
Reviewed-by: Pranjal Shrivastava <praan@google.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Mostafa Saleh <smostafa@google.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
 2026-01-10 10:52:25 +01:00
Tony Luck
842e7f97d7 x86/resctrl: Add energy/perf choices to rdt boot option 
Legacy resctrl features are enumerated by X86_FEATURE_* flags. These may be
overridden by quirks to disable features in the case of errata.  Users can use
kernel command line options to either disable a feature, or to force enable
a feature that was disabled by a quirk.

A different approach is needed for hardware features that do not have an
X86_FEATURE_* flag.

Update parsing of the "rdt=" boot parameter to call the telemetry driver
directly to handle new "perf" and "energy" options that controls activation of
telemetry monitoring of the named type. By itself a "perf" or "energy" option
controls the forced enabling or disabling (with ! prefix) of all event groups
of the named type. A ":guid" suffix allows for fine grained control per event
group.

  [ bp: s/intel_aet_option/intel_handle_aet_option/g ]

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lore.kernel.org/20251217172121.12030-1-tony.luck@intel.com
 2026-01-09 23:38:32 +01:00
Dapeng Mi
860bcb1021 KVM: x86/pmu: Expose enable_mediated_pmu parameter to user space 
Expose enable_mediated_pmu parameter to user space, i.e. allow userspace
to enable/disable mediated vPMU support.

Document the mediated versus perf-based behavior as part of the
kernel-parameters.txt entry, and opportunistically add an entry for the
core enable_pmu param as well.

Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Signed-off-by: Mingwei Zhang <mizhang@google.com>
Tested-by: Xudong Hao <xudong.hao@intel.com>
Co-developed-by: Sean Christopherson <seanjc@google.com>
Tested-by: Manali Shukla <manali.shukla@amd.com>
Link: https://patch.msgid.link/20251206001720.468579-34-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
 2026-01-08 11:52:15 -08:00
Yu Liao
be5c6ec660 Documentation/kernel-parameters: Add tsa under mitigations=off 
On X86 AMD systems, mitigations=off also disables the Transient
Scheduler Attacks (TSA) mitigation. Add it to the list.

Signed-off-by: Yu Liao <liaoyu.ly@bytedance.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20251225121438.38427-1-liaoyu.ly@bytedance.com>
 2026-01-06 15:23:27 -07:00
Max Nikulin
3a8501b3a4 docs: admin: devices: remove /dev/cdwriter 
Remove /dev/cdwriter from the local symlinks table and from the related
note.

Creation of the symlink was removed from udev in commit [1] that
became a part of release 115 in 2007 [2].

The altered text was added in 1995 [3].

[1] https://git.kernel.org/pub/scm/linux/hotplug/udev.git/commit/?id=b1a2b83f2d
    2007-08-11 14:06:03 +0200 Kay Sievers.
    rules: update Fedora rules

[2] https://git.kernel.org/pub/scm/linux/hotplug/udev.git/commit/?h=7e599863919
    2007-08-24 01:29:54 +0200 Kay Sievers.
    release 115

[3] https://git.kernel.org/pub/scm/linux/kernel/git/history/history.git/diff/Documentation/devices.txt?h=v2.5.45&id=6e995ea941a
    1995-11-21 Linus Torvalds.
    Import 1.3.43

Signed-off-by: Max Nikulin <manikulin@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <f5c3f6e9-cd92-47e3-89c3-06dbcfc98c17@gmail.com>
 2026-01-06 15:06:30 -07:00
Akiyoshi Kurita
efbc288d15
docs: alienware-wmi: fix typo 
Fix a typo in the manual fan control description ("aproximate" ->
"approximate").

Signed-off-by: Akiyoshi Kurita <weibu@redadmin.org>
Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com>
Reviewed-by: Kurt Borja <kuurtb@gmail.com>
Link: https://patch.msgid.link/20251230213431.656106-1-weibu@redadmin.org
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
 2026-01-05 16:29:00 +02:00