Commit Graph

41826 Commits

Author SHA1 Message Date
Linus Torvalds
f259f446f5 soc: fixes for 7.3
The driver fixes are all for simple mistakes: a use-after-free bug
 on Samsung Exynos, error handling and reference counting on Arm SCMI
 firmware and a problem dealing with inconsistent firmware information.
 
 The rest are devicetree fixes for arm64 platforms from Altera, Renesas
 and Amlogic. On the Renesas platform, one patch addresses a boot time
 regression, the rest address minor performance and correctness issues.
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Merge tag 'soc-fixes-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull SoC fixes from Arnd Bergmann:
 "The driver fixes are all for simple mistakes: a use-after-free bug on
  Samsung Exynos, error handling and reference counting on Arm SCMI
  firmware and a problem dealing with inconsistent firmware information.

  The rest are devicetree fixes for arm64 platforms from Altera, Renesas
  and Amlogic. On the Renesas platform, one patch addresses a boot time
  regression, the rest address minor performance and correctness issues"

* tag 'soc-fixes-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (21 commits)
  soc: samsung: exynos-pmu: fix use-after-free of interrupt generator node
  arm64: dts: renesas: r8a779f0: Set UFS lane count
  firmware: arm_scmi: Fix typo "upto" in comment
  arm64: dts: renesas: r9a09g087: Switch GBETH TX queue scheduling to WRR
  arm64: dts: renesas: r9a09g077: Switch GBETH TX queue scheduling to WRR
  arm64: dts: renesas: r9a09g047: Switch GBETH TX queue scheduling to WRR
  arm64: dts: renesas: r9a09g056: Switch GBETH TX queue scheduling to WRR
  arm64: dts: renesas: r9a09g057: Switch GBETH TX queue scheduling to WRR
  firmware: arm_ffa: Tear down driver during shutdown
  clk: scpi: use PLATFORM_DEVID_NONE for scpi-cpufreq
  clk: scpi: register scpi-cpufreq once and clear on failure
  clk: scpi: bound-check DVFS index in scpi_dvfs_recalc_rate
  firmware: arm_scpi: reject DVFS OPP count above MAX_DVFS_OPPS
  firmware: arm_scpi: fix device_node leak in scpi_dev_domain_id
  arm64: dts: socfpga: change access permission from 755 to 644
  ARM: socfpga: select the PL310 erratum 753970 workaround
  arm64: dts: amlogic: t7: fix the pin groups of the vsync PWM
  arm64: dts: amlogic: t7: khadas-vim4: add the PWM-driven supplies
  arm64: dts: amlogic: t7: fix the pin groups of two PWM outputs
  arm64: dts: amlogic: t7: khadas-vim4: allow the SD card to be power cycled
  ...
2026-09-18 09:34:57 -07:00
Linus Torvalds
a077be4fde arm64 fixes for -rc4
- Fix hypercall arguments when resetting EL2 vectors during hibernation
 
 - Fix hibernation with 52-bit capable kernels on machines without
   52-bit addressing, similarly to the recent kexec fix
 
 - Fix a bunch of clumsy codegen issues with our per-cpu accessors
 
 - Fix MTE ptrace documentation to reflect the de-facto ABI behaviour
 
 - Fix pthread_join() usage in MTE selftest
 
 - Fix port selection in the Arm CMN PMU driver
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "In this batch we've got a couple of hibernation fixes, a couple of
  minor MTE fixes, some per-cpu codegen fixes (which were found as part
  of Mark's series adding preemptible this_cpu_*() operations) and a fix
  for the Arm CMN PMU driver.

  Summary:

   - Fix hypercall arguments when resetting EL2 vectors during
     hibernation

   - Fix hibernation with 52-bit capable kernels on machines without
     52-bit addressing, similarly to the recent kexec fix

   - Fix a bunch of clumsy codegen issues with our per-cpu accessors

   - Fix MTE ptrace documentation to reflect the de-facto ABI behaviour

   - Fix pthread_join() usage in MTE selftest

   - Fix port selection in the Arm CMN PMU driver"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: mte: Fix PTRACE_{PEEK,POKE}MTETAGS error documentation
  kselftest/arm64: Fix size of thread_data values for pthread_join()
  arm64: percpu: Fix LSE operations on {8,16}-bit types
  arm64: percpu: Fix this_cpu_and() mask generation
  arm64: percpu: Fix this_cpu_write() casting
  arm64: hibernate: clone only the linear map that exists at runtime
  perf/arm-cmn: Fix wp_dev_sel2 setting for multi-DTM configurations
  arm64: hibernate: pass HVC_SET_VECTORS args to the resume hvc
2026-09-18 09:28:30 -07:00
Arnd Bergmann
2d5061ff37 Renesas fixes for v7.3 (take two)
- Fix UFS regression on R-Car S4.
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Merge tag 'renesas-fixes-for-v7.3-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel into arm/fixes

Renesas fixes for v7.3 (take two)

  - Fix UFS regression on R-Car S4.

* tag 'renesas-fixes-for-v7.3-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel:
  arm64: dts: renesas: r8a779f0: Set UFS lane count

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2026-09-18 14:34:03 +02:00
Arnd Bergmann
ce55a6545a Amlogic DT Fixes for v7.3:
- Set of fixes for Amlogic T7:
  - use the real UART pclk
  - allow the SD card to be power cycled by dropping regulator-always-on
  - fix the pin groups of two PWM outputs
  - add the CPU cores PWM-driven supplies to fix runtime crashes
  - fix the pin groups of the vsync PWM using non-existing pin group
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Merge tag 'amlogic-fixes-v7.3-rc' of https://git.kernel.org/pub/scm/linux/kernel/git/amlogic/linux into arm/fixes

Amlogic DT Fixes for v7.3:
- Set of fixes for Amlogic T7:
 - use the real UART pclk
 - allow the SD card to be power cycled by dropping regulator-always-on
 - fix the pin groups of two PWM outputs
 - add the CPU cores PWM-driven supplies to fix runtime crashes
 - fix the pin groups of the vsync PWM using non-existing pin group

* tag 'amlogic-fixes-v7.3-rc' of https://git.kernel.org/pub/scm/linux/kernel/git/amlogic/linux:
  arm64: dts: amlogic: t7: fix the pin groups of the vsync PWM
  arm64: dts: amlogic: t7: khadas-vim4: add the PWM-driven supplies
  arm64: dts: amlogic: t7: fix the pin groups of two PWM outputs
  arm64: dts: amlogic: t7: khadas-vim4: allow the SD card to be power cycled
  arm64: dts: amlogic: t7: use the real UART pclk

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2026-09-16 13:05:33 +02:00
Arnd Bergmann
2d5adffc11 Renesas fixes for v7.3
- Fix Ethernet stalls on RZ/V2H, RZ/V2N, RZ/G3E, RZ/T2H, and RZ/N2H.
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Merge tag 'renesas-fixes-for-v7.3-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel into arm/fixes

Renesas fixes for v7.3

  - Fix Ethernet stalls on RZ/V2H, RZ/V2N, RZ/G3E, RZ/T2H, and RZ/N2H.

* tag 'renesas-fixes-for-v7.3-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel:
  arm64: dts: renesas: r9a09g087: Switch GBETH TX queue scheduling to WRR
  arm64: dts: renesas: r9a09g077: Switch GBETH TX queue scheduling to WRR
  arm64: dts: renesas: r9a09g047: Switch GBETH TX queue scheduling to WRR
  arm64: dts: renesas: r9a09g056: Switch GBETH TX queue scheduling to WRR
  arm64: dts: renesas: r9a09g057: Switch GBETH TX queue scheduling to WRR

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2026-09-14 17:01:58 +02:00
Arnd Bergmann
ebdad7d867 SoCFPGA DTS fix for v7.3
- Fix DTS file access permissions
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Merge tag 'socfpga_dts_fix_for_v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux into arm/fixes

SoCFPGA DTS fix for v7.3
- Fix DTS file access permissions

* tag 'socfpga_dts_fix_for_v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux:
  arm64: dts: socfpga: change access permission from 755 to 644

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2026-09-14 17:01:19 +02:00
Koichiro Den
8dc2615d57 arm64: dts: renesas: r8a779f0: Set UFS lane count
Since commit e72323f3b0 ("scsi: ufs: core: Configure only active lanes
during link"), the following error is observed on R-Car S4:

    ufshcd-renesas e6860000.ufs: Tx lane mismatch [config,reported] [2,1]
    ufshcd-renesas e6860000.ufs: link startup failed -67
    ufshcd-renesas e6860000.ufs: error -ENOLINK: Initialization failed with error -67
    ufshcd-renesas e6860000.ufs: probe with driver ufshcd-renesas failed with error -67

R-Car S4 has one UFS lane per direction, as described in section 152.1
of its hardware manual.  Without lanes-per-direction, the UFS platform
driver defaults to two lanes.

Previously, the core used PA_CONNECTEDRXDATALANES and
PA_CONNECTEDTXDATALANES to configure the link without checking them
against lanes-per-direction, so the missing property did not prevent
initialization.

Explicitly set lanes-per-direction to 1, now that the validation is in
place.

Fixes: 5235d55177 ("arm64: dts: renesas: r8a779f0: Add UFS node")
Cc: stable@vger.kernel.org # 7.2+
Signed-off-by: Koichiro Den <den@valinux.co.jp>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260911073058.253000-1-den@valinux.co.jp
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2026-09-14 10:07:09 +02:00
Catalin Marinas
fdb9ebc7fb arm64: mte: Fix PTRACE_{PEEK,POKE}MTETAGS error documentation
PTRACE_{PEEK,POKE}MTETAGS return -EIO rather than -EOPNOTSUPP (as
documented) when no tags are copied from/to a mapping without PROT_MTE.
This has been the behaviour since the interface was introduced, though
the original intent was to distinguish between address not being
accessible and mapped as untagged.

Update the documentation to match the implementation (de-facto ABI).
Since -EOPNOTSUPP was never returned, change the error assignment to
-EIO as well to avoid confusion.

Fixes: df9d7a22dd ("arm64: mte: Add Memory Tagging Extension documentation")
Fixes: 18ddbaa02b ("arm64: mte: ptrace: Add PTRACE_{PEEK,POKE}MTETAGS support")
Reported-by: Yury Khrustalev <yury.khrustalev@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
2026-09-11 12:50:02 +00:00
Mark Rutland
8cf2093f53 arm64: percpu: Fix LSE operations on {8,16}-bit types
The assembly for __percpu_##name##_case_##sz() and
__percpu_##name##_return_case_##sz() doesn't use the 'sfx' macro
argument to form the LSE instruction. Without 'sfx', a W register
argument will imply a 32-bit memory location, and consequently
{8,16}-bit ops will erroneously read and write 32 bits of memory when
the LSE instruction is used.

Fix this by appending 'sfx' to 'op_lse' to LSE instruction. It is not
necessary (and not valid) to append 'sfx' to 'op_llsc', as 'op_llsc' is
a register-register operation which does not access memory (and does not
take a size suffix).

Fixes: 959bf2fd03 ("arm64: percpu: Rewrite per-cpu ops to allow use of LSE atomics")
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Jinjie Ruan <ruanjinjie@huawei.com>
Cc: Ada Couprie Diaz <ada.coupriediaz@arm.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Vladimir Murzin <vladimir.murzin@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Shi <yang@os.amperecomputing.com>
Cc: stable@vger.kernel.org
Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
2026-09-11 12:32:22 +00:00
Mark Rutland
44274c6572 arm64: percpu: Fix this_cpu_and() mask generation
The arm64 implementation of this_cpu_and(pcp, val) is built in terms of
ANDNOT operations, which requires the 'val' argument to be bitwise
negated. The bitwise negation is not implemented correctly, with two
bugs described below.

(1) The bitwise negation is performed as '~val' rather than '~(val)'.
    This won't always generate the expected value when 'val' is an
    expression.

    For example, for this_cpu_and(pcp, 1 - 1):

    * 'val'    is  '1 - 1'   ===> (int) 0x00000000
    * '~val'   is '~1 - 1'   ===> (int) 0xfffffffd
    * '~(val)' is '~(1 - 1)' ===> (int) 0xffffffff

    ... and thus bit[1] of 'pcp' would be preserved unexpectedly by the
    ANDNOT operation.

(2) The bitwise negation is performed on 'val' before it has been cast
    to (at least) the width of 'pcp'. This won't always generate the
    expected value for the upper bits.

    For example, for this_cpu_and(pcp, zero), where 'pcp' is a u64 and
    'zero' is a u32:

    * 'zero'           ===> (u32) 0x00000000
    * '~(zero)'        ===> (u32) 0xffffffff
    * '(u64)~(zero)'   ===> (u64) 0x00000000ffffffff
    * '~((u64)(zero))' ===> (u64) 0xffffffffffffffff

    ... and thus bits[63:32] of 'pcp' would be preserved unexpectedly by
    the ANDNOT operation.

Fix these issues by adding brackets around 'val', and by casting 'val'
to an appropriately-sized type before bitwise negation.

Fixes: 959bf2fd03 ("arm64: percpu: Rewrite per-cpu ops to allow use of LSE atomics")
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Jinjie Ruan <ruanjinjie@huawei.com>
Tested-by: Muhammad Usama Anjum <usama.anjum@arm.com>
Acked-by: Christopher Lameter (Ampere) <cl@gentwo.org>
Cc: Ada Couprie Diaz <ada.coupriediaz@arm.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Vladimir Murzin <vladimir.murzin@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Shi <yang@os.amperecomputing.com>
Cc: stable@vger.kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
2026-09-11 12:32:22 +00:00
Mark Rutland
885bff055a arm64: percpu: Fix this_cpu_write() casting
The arm64 implementation of this_cpu_write() casts 'val' to unsigned
long. This is necessary to handle cases where 'val' is a pointer type,
and to avoid spurious compiler warnings for the (unreachable!) cases
where the pointer type would be cast to a smaller integer type.

Unfortunately, the cast is applied to 'val' rather than '(val)', which
won't always generate the expected value when 'val' is an expression.

For example, for this_cpu_write(pcp, zero - 1), where 'pcp' is a u64 and
'zero' is a u32:

* 'zero'                      ===> (u32) 0x00000000
* 'zero - 1'                  ===> (u32) 0xffffffff
* '(unsigned long)zero - 1'   ===> (u64) 0xffffffffffffffff
* '(unsigned long)(zero - 1)' ===> (u64) 0x00000000ffffffff

Fix this by adding brackets around 'val'.

Fixes: 959bf2fd03 ("arm64: percpu: Rewrite per-cpu ops to allow use of LSE atomics")
Reported-by: David Laight <david.laight.linux@gmail.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: David Laight <david.laight.linux@gmail.com>
Reviewed-by: Jinjie Ruan <ruanjinjie@huawei.com>
Tested-by: Muhammad Usama Anjum <usama.anjum@arm.com>
Acked-by: Christopher Lameter (Ampere) <cl@gentwo.org>
Cc: Ada Couprie Diaz <ada.coupriediaz@arm.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Vladimir Murzin <vladimir.murzin@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Shi <yang@os.amperecomputing.com>
Cc: stable@vger.kernel.org
Reviewed-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
2026-09-11 12:32:22 +00:00
Breno Leitao
e4a6f57d22 arm64: hibernate: clone only the linear map that exists at runtime
This is similar to commit 1537e55728 ("arm64: trans_pgd: clone only
the linear map that exists at runtime"), but in a different place.

swsusp_arch_resume() clones the kernel linear map with
trans_pgd_create_copy(..., PAGE_OFFSET, PAGE_END). PAGE_OFFSET comes
from the compile-time VA_BITS, so a CONFIG_ARM64_VA_BITS_52 kernel
booting on hardware without LPA2 -- vabits_actual is 48 and the fifth
level is folded -- hands the walk a 3.9PB window while its linear map
only spans the top 128TB.

On a VA_BITS_52 4k kernel with CONFIG_KASAN_GENERIC in a 4GB VM, I see:

  swapper/0: page allocation failure: order:0, mode:0x920(GFP_ATOMIC|__GFP_ZERO)
   hibernate_page_alloc+0x10/0x1c
   swsusp_arch_resume+0x70/0x320
   hibernation_restore+0xa4/0x138
   software_resume+0x15c/0x270
  PM: hibernation: Failed to load image, recovering.
  PM: hibernation: resume failed (-12)

Fix it by copying the linear map that is the actual one, not the
compiled one.

Fixes: a6bbf5d4d9 ("arm64: mm: Add definitions to support 5 levels of paging")
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
2026-09-11 12:14:43 +00:00
Bradley Morgan
955d86e5f3 arm64: hibernate: pass HVC_SET_VECTORS args to the resume hvc
swsusp_arch_suspend_exit() reinstalls the restored kernel's hyp stub
vectors with an hvc, but never passes the arguments. x0 is not set to
HVC_SET_VECTORS and x1 is not set to the vector address, so the stub
dispatch falls through and returns without writing vbar_el2. EL2 is
left pointing at the trans_pgd copy of the vectors, a page that
swsusp_free() releases right after resume.

Set the arguments up the same way __hyp_set_vectors() does.

Without this fix, Vladimir was able to trigger a hang when resuming from
hibernation with CONFIG_PAGE_POISONING=y and page_poison=on.

Fixes: 788bfdd974 ("arm64: trans_pgd: hibernate: Add trans_pgd_copy_el2_vectors")
Cc: stable@vger.kernel.org
Signed-off-by: Bradley Morgan <include@grrlz.net>
Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
2026-09-09 12:51:20 +00:00
Sascha Bischoff
1017911fcc irqchip/gic-v5: Preserve ICC_CR0_EL1 state
In addition to EN, ICC_CR0_EL1 contains other fields, such as LINK and
LINK_IDLE. The driver only needs to modify EN, and must preserve the
values of all other fields when enabling or disabling the CPU
interface.

Define the missing LINK and LINK_IDLE fields, and use read-modify-write
accesses to update EN without affecting the rest of ICC_CR0_EL1.

Fixes: 7ec80fb3f0 ("irqchip/gic-v5: Add GICv5 PPI support")
Reported-by: Sashiko <sashiko-bot@kernel.org>
Signed-off-by: Sascha Bischoff <sascha.bischoff@arm.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://patch.msgid.link/20260907164945.714545-1-sascha.bischoff@arm.com
Closes: https://lore.kernel.org/r/20260807121703.D4B7A1F00A3A@smtp.kernel.org
2026-09-07 21:44:17 +02:00
Linus Torvalds
1fc5a74b10 kmalloc_obj conversions for v7.3-rc2
- Run scripts/coccinelle/api/kmalloc_objs.cocci for v7.3
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Merge tag 'kmalloc_obj-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull kmalloc_obj conversions from Kees Cook:
 "Another run of the Coccinelle script for converting kmalloc()
  family of allocations to kmalloc_obj() via the existing rules
  in scripts/coccinelle/api/kmalloc_objs.cocci"

* tag 'kmalloc_obj-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  treewide: refresh kmalloc_obj() conversions
  drm/amd/display: Fix harmless type mismatch in allocation
2026-09-05 20:45:18 -07:00
Kees Cook
3a2c4d55e3 treewide: refresh kmalloc_obj() conversions
This is another run of the Coccinelle script for converting kmalloc()
family of allocations to kmalloc_obj() via the existing rules in
scripts/coccinelle/api/kmalloc_objs.cocci

This catches both the set of kmalloc() uses added since the first
kmalloc_obj() conversions in v7.0 and adds a large group missed in the
first pass due to Coccinelle not interacting well with the cleanup.h
scoped_...() family of macros[1]. I worked around this with spatch's
"--macro-file" argument to a file with all the scoped_...() macros mapped
to Coccinelle's YACFE_ITERATOR[2] as that was the closest viable control
flow indicator I could find.

Build tested allmodconfig on x86, arm64, arm, loongarch, mips, powerpc,
riscv, and s390 with no new warnings.

Link: https://lore.kernel.org/lkml/202609021314.8A9C0B8@keescook/ [1]
Link: https://github.com/coccinelle/coccinelle/blob/master/standard.h [2]
Signed-off-by: Kees Cook <kees+treewide@kernel.org>
2026-09-04 21:37:00 -07:00
Fuad Tabba
5445d64199 arm64: Don't read GMID_EL1 when MTE is disabled
__cpuinfo_store_cpu() gates the GMID_EL1 read on the raw
ID_AA64PFR1_EL1, so it reads the register even when the kernel has
disabled MTE (CONFIG_ARM64_MTE=n or arm64.nomte). KVM sets HCR_EL2.TID5
in that case, and pKVM injects an UNDEF the host cannot handle:

  Internal error: Oops - Undefined instruction: 0000000002000000 [#1]  SMP
  pc : __cpuinfo_store_cpu+0xf4/0x264
  Kernel panic - not syncing: Attempted to kill the idle task!

Only pKVM reaches it, and only after a CPU is offlined and brought back
online: its CPU_ON relay sets the host HCR before the CPU enters EL1,
while plain nVHE sets it at CPUHP_AP_KVM_ONLINE.

Gate the read on the CPU's own ID_AA64PFR1_EL1 with the command-line
override applied, and on CONFIG_ARM64_MTE, which no register reflects.
The boot CPU stores its registers before init_cpu_features() strips an
unsafe override, so clamp against the hardware value here too.

Fixes: f35abcbb8a ("KVM: arm64: Trap MTE access and discovery when MTE is disabled")
Cc: stable@vger.kernel.org
Signed-off-by: Fuad Tabba <fuad.tabba@linux.dev>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
2026-09-03 13:03:23 +00:00
Khushit Shah
5541432e09 arm64: errata: pass REVIDR when matching target implementation CPUs
When target implementation CPUs are provided, is_affected_midr_range()
accidentally passed the MIDR as both arguments to __is_affected_midr_range(),
so the REVIDR mask check operated on the wrong register.

Pass REVIDR as intended.

Fixes: 86edf6bdcf ("smccc/kvm_guest: Enable errata based on implementation CPUs")
Cc: stable@vger.kernel.org
Signed-off-by: Khushit Shah <khushit.shah@nutanix.com>
Reviewed-by: Zenghui Yu (Huawei) <zenghui.yu@linux.dev>
Acked-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Shameer Kolothum <skolothumtho@nvidia.com>
Signed-off-by: Will Deacon <will@kernel.org>
2026-09-03 13:02:01 +00:00
Breno Leitao
1537e55728 arm64: trans_pgd: clone only the linear map that exists at runtime
kexec_file_load() fails on arm64 if we have CONFIG_ARM64_VA_BITS_52 but
it runs on a !FEAT_LPA2 host (such as my loving Grace machine).

That is because trans_pgd_create_copy() uses the compile time
PAGE_OFFSET (VA 52) instead of the actual VA size (48 -- due to the lack
of LPA2). With the fifth level folded, pgd_none() is always false, so
the walk cannot skip the 15 extra PGDIR_SIZE slots, and they all alias
back to the same table: the whole kernel page table gets cloned 16
times, KASAN shadow included. Without KASAN it does not blow up, it just
wastes ~RAM/32 in page tables.

Fix it by copying the linear map that is the actual one, not the
compiled one.

Fixes: a6bbf5d4d9 ("arm64: mm: Add definitions to support 5 levels of paging")
Signed-off-by: Breno Leitao <leitao@debian.org>
Tested-by: Yury Smirnov <yurymonzon@gmail.com>
Signed-off-by: Will Deacon <will@kernel.org>
2026-09-03 13:01:15 +00:00
Karl Mehltretter
a77644d009 arm64: mm: Fix the lockless page-table walk in show_pte()
show_pte() walks page tables locklessly and can run with interrupts
enabled. A concurrent teardown can free a table page while it is being
walked. It can also clear a parent entry after show_pte() checked it; the
regular pXd_offset() helpers then reread the cleared entry and can derive a
bogus lower-level pointer and fault again.

Use the lockless offset helpers with the saved parent entries, as
gup_fast() does, and pass the saved PMD to pte_offset_map().

For task page tables, arm64 selects MMU_GATHER_RCU_TABLE_FREE. Disable
local interrupts around the walk to hold off RCU-deferred table frees and
block the tlb_remove_table_sync_one() IPI until the walk is finished.

Place the IRQ guard after the header print. This does not make the output a
consistent snapshot, but prevents the task page-table walk from
dereferencing a released table page or deriving a pointer from a different
parent value.

Fixes: 1d18c47c73 ("arm64: MMU fault handling and page table management")
Cc: stable@vger.kernel.org
Assisted-by: LLM
Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
Signed-off-by: Will Deacon <will@kernel.org>
2026-09-03 12:58:12 +00:00
Ovidiu Panait
2ac7bad110 arm64: dts: renesas: r9a09g087: Switch GBETH TX queue scheduling to WRR
The GBETH ethernet nodes don't specify a TX scheduling policy, so stmmac
falls back to Strict Priority. In this configuration the queue with the
highest priority gets all the traffic, starving the others under load.

Under sustained UDP TX load with multiple data streams, this starvation
triggers spurious adapter resets due to TX queue timeouts:

  iperf3 -c <ip> -i0 -t60 --bind-dev end0 -u -b0 -P4
  end0: NETDEV WATCHDOG: CPU: 1: transmit queue 1 timed out 5228 ms
  end0: Reset adapter.

Investigation shows that only the highest priority queue is advancing
while the others stall for more than 5 seconds, causing a netdev watchdog
reset.

Switch the TX scheduling policy to Weighted-Round-Robin (WRR) so that
traffic is processed across all queues, eliminating the stalls.

Fixes: c4698a3499 ("arm64: dts: renesas: r9a09g087: Add GMAC nodes")
Signed-off-by: Ovidiu Panait <ovidiu.panait.rb@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260722085353.136986-6-ovidiu.panait.rb@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2026-09-02 14:32:37 +02:00
Ovidiu Panait
f9d9a1913c arm64: dts: renesas: r9a09g077: Switch GBETH TX queue scheduling to WRR
The GBETH ethernet nodes don't specify a TX scheduling policy, so stmmac
falls back to Strict Priority. In this configuration the queue with the
highest priority gets all the traffic, starving the others under load.

Under sustained UDP TX load with multiple data streams, this starvation
triggers spurious adapter resets due to TX queue timeouts:

  iperf3 -c <ip> -i0 -t60 --bind-dev end0 -u -b0 -P4
  end0: NETDEV WATCHDOG: CPU: 1: transmit queue 1 timed out 5228 ms
  end0: Reset adapter.

Investigation shows that only the highest priority queue is advancing
while the others stall for more than 5 seconds, causing a netdev watchdog
reset.

Switch the TX scheduling policy to Weighted-Round-Robin (WRR) so that
traffic is processed across all queues, eliminating the stalls.

Fixes: 394c1e24a4 ("arm64: dts: renesas: r9a09g077: Add GMAC nodes")
Signed-off-by: Ovidiu Panait <ovidiu.panait.rb@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260722085353.136986-5-ovidiu.panait.rb@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2026-09-02 14:32:37 +02:00
Ovidiu Panait
63016c3a91 arm64: dts: renesas: r9a09g047: Switch GBETH TX queue scheduling to WRR
The GBETH ethernet nodes don't specify a TX scheduling policy, so stmmac
falls back to Strict Priority. In this configuration the queue with the
highest priority gets all the traffic, starving the others under load.

Under sustained UDP TX load with multiple data streams, this starvation
triggers spurious adapter resets due to TX queue timeouts:

  iperf3 -c <ip> -i0 -t60 --bind-dev end0 -u -b0 -P4
  end0: NETDEV WATCHDOG: CPU: 1: transmit queue 1 timed out 5228 ms
  end0: Reset adapter.

Investigation shows that only the highest priority queue is advancing
while the others stall for more than 5 seconds, causing a netdev watchdog
reset.

Switch the TX scheduling policy to Weighted-Round-Robin (WRR) so that
traffic is processed across all queues, eliminating the stalls.

Fixes: 41ffbb1c42 ("arm64: dts: renesas: r9a09g047: Add GBETH nodes")
Signed-off-by: Ovidiu Panait <ovidiu.panait.rb@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Link: https://patch.msgid.link/20260722085353.136986-4-ovidiu.panait.rb@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2026-09-02 14:32:37 +02:00
Ovidiu Panait
66fcbdbeca arm64: dts: renesas: r9a09g056: Switch GBETH TX queue scheduling to WRR
The GBETH ethernet nodes don't specify a TX scheduling policy, so stmmac
falls back to Strict Priority. In this configuration the queue with the
highest priority gets all the traffic, starving the others under load.

Under sustained UDP TX load with multiple data streams, this starvation
triggers spurious adapter resets due to TX queue timeouts:

  iperf3 -c <ip> -i0 -t60 --bind-dev end0 -u -b0 -P4
  end0: NETDEV WATCHDOG: CPU: 1: transmit queue 1 timed out 5228 ms
  end0: Reset adapter.

Investigation shows that only the highest priority queue is advancing
while the others stall for more than 5 seconds, causing a netdev watchdog
reset.

Switch the TX scheduling policy to Weighted-Round-Robin (WRR) so that
traffic is processed across all queues, eliminating the stalls.

Fixes: c8c8a57c5b ("arm64: dts: renesas: r9a09g056: Add GBETH nodes")
Signed-off-by: Ovidiu Panait <ovidiu.panait.rb@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260722085353.136986-3-ovidiu.panait.rb@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2026-09-02 14:32:37 +02:00
Ovidiu Panait
33da68f61d arm64: dts: renesas: r9a09g057: Switch GBETH TX queue scheduling to WRR
The GBETH ethernet nodes don't specify a TX scheduling policy, so stmmac
falls back to Strict Priority. In this configuration the queue with the
highest priority gets all the traffic, starving the others under load.

Under sustained UDP TX load with multiple data streams, this starvation
triggers spurious adapter resets due to TX queue timeouts:

  iperf3 -c <ip> -i0 -t60 --bind-dev end0 -u -b0 -P4
  end0: NETDEV WATCHDOG: CPU: 1: transmit queue 1 timed out 5228 ms
  end0: Reset adapter.

Investigation shows that only the highest priority queue is advancing
while the others stall for more than 5 seconds, causing a netdev watchdog
reset.

Switch the TX scheduling policy to Weighted-Round-Robin (WRR) so that
traffic is processed across all queues, eliminating the stalls.

Fixes: 050ee38d00 ("arm64: dts: renesas: r9a09g057: Add GBETH nodes")
Signed-off-by: Ovidiu Panait <ovidiu.panait.rb@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260722085353.136986-2-ovidiu.panait.rb@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2026-09-02 14:32:37 +02:00
Dinh Nguyen
5f8cb07d7a arm64: dts: socfpga: change access permission from 755 to 644
These files have an incorrect access permission of 755 instead of 644.
Change them to the correct access permission of 644.

Fixes: 4bc04eb90b ("arm64: dts: socfpga: stratix10: Add emmc support")
Cc: <stable@vger.kernel.org> # v7.1+
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
2026-08-31 18:08:36 -05:00
Lucas Tanure
406292fd75 arm64: dts: amlogic: t7: fix the pin groups of the vsync PWM
The vsync PWM output can appear on either of two pins, but the
description named a single group that does not exist, so anything using
it would refuse to start.

Name the real groups instead, one entry per pin. No board describes this
output yet, so nothing changes today.

Fixes: 2a2a7b9701 ("arm64: dts: amlogic: t7: Add PWM pinctrl nodes")
Assisted-by: Claude:claude-opus-5
Signed-off-by: Lucas Tanure <tanure@linux.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20260829094758.23248-5-tanure@linux.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
2026-08-31 14:42:59 +02:00
Lucas Tanure
1e5a53bd16 arm64: dts: amlogic: t7: khadas-vim4: add the PWM-driven supplies
The board powers its two CPU clusters, the GPU, the NPU, the memory and
the always-on domain from regulators steered by PWM outputs. None of
them were described, so Linux treated those outputs as unused and
switched them off part way through boot. The supplies then drifted away
from the levels the bootloader had set, which showed up as random hangs
and memory corruption.

Describe each supply so it has an owner and is left alone.

The voltage ranges are read off the feedback networks on the board
schematic. VDDNPU is deliberately not the range in Amlogic's own
device tree: this board fits a different feedback resistor, which
puts it about 40mV higher at both ends.

Fixes: 8c45bf9ae4 ("arm64: dts: amlogic: t7: khadas-vim4: Add power regulators")
Assisted-by: Claude:claude-opus-5
Signed-off-by: Lucas Tanure <tanure@linux.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20260829094758.23248-4-tanure@linux.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
2026-08-31 14:42:58 +02:00
Lucas Tanure
ae7be5c58a arm64: dts: amlogic: t7: fix the pin groups of two PWM outputs
Two of the PWM outputs can each appear on more than one pin, but the
description named a single group that does not exist, so anything using
it refused to start.

Name the real groups instead, one entry per pin, the same way the other
multi-pin PWM output is already described.

Fixes: 2a2a7b9701 ("arm64: dts: amlogic: t7: Add PWM pinctrl nodes")
Assisted-by: Claude:claude-opus-5
Signed-off-by: Lucas Tanure <tanure@linux.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20260829094758.23248-3-tanure@linux.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
2026-08-31 14:42:58 +02:00
Lucas Tanure
c793a084ab arm64: dts: amlogic: t7: khadas-vim4: allow the SD card to be power cycled
SD cards start at 3.3V and switch to 1.8V to reach UHS-I speeds. Some
cards refuse that switch, and the SD specification says the only way
to recover is to power the card off and start again.

SD_3V3 is marked regulator-always-on, so the supply never goes off,
the card stays stuck half way through the switch, and the MMC core
retries forever:

  mmc1: error -95 whilst initialising SD card

Drop regulator-always-on. regulator-boot-on still turns the supply on
at boot, and a card that refuses the switch now falls back to high
speed instead of failing to initialise.

Fixes: 8c45bf9ae4 ("arm64: dts: amlogic: t7: khadas-vim4: Add power regulators")
Signed-off-by: Lucas Tanure <tanure@linux.com>
Assisted-by: Claude:claude-fable-5
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20260823115335.102219-3-tanure@linux.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
2026-08-31 14:37:48 +02:00
Lucas Tanure
882de800bf arm64: dts: amlogic: t7: use the real UART pclk
uart_a listed the 24MHz crystal for all three of its clocks because the
T7 clock controller driver did not exist when these boards were added.

That leaves the real UART bus clock without a user, so the kernel
turns it off when it disables unused clocks at the end of boot, and
the board hangs.

Update the board DTS files to point uart_a's pclk to CLKID_SYS_UART_A
instead of the dummy crystal clock.

Fixes: 4fef056588 ("arm64: dts: amlogic-t7-a311d2-khadas-vim4: add initial device-tree")
Fixes: 6f048cc7a6 ("arm64: dts: add board AN400")
Signed-off-by: Lucas Tanure <tanure@linux.com>
Assisted-by: Claude:claude-fable-5
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20260823115335.102219-2-tanure@linux.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
2026-08-31 14:37:48 +02:00
Linus Torvalds
9d607ae0f7 arm64 fixes for -rc1
- Fix address handling of final memory region in ptdump
 
 - Fix emulation of decrementing load/store multiple from 32-bit task
 
 - Fix SCTLR context-switching for store-only MTE mode
 
 - Fix numerous issues in MTE selftests
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "A mixture of ptdump, compat and MTE fixes that came in during the
  merge window:

   - Fix address handling of final memory region in ptdump

   - Fix emulation of decrementing load/store multiple from 32-bit task

   - Fix SCTLR context-switching for store-only MTE mode

   - Fix numerous issues in MTE selftests"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  selftests/arm64: Add MTE test config fragment
  selftests/arm64: Fix MTE prctl TAP plan
  selftests/arm64: Treat KSM merge_across_nodes as optional
  selftests/arm64: Print missing MTE TAP headers
  arm64: compat: Fix decrementing LDM/STM alignment emulation
  arm64: process: Fix context switching MTE store-only tag check
  KVM: arm64: ptdump: Flush the last region
  arm64: ptdump: Make note_page_flush() range aware
2026-08-28 09:02:04 -07:00
Karl Mehltretter
f5b8b9037d arm64: compat: Fix decrementing LDM/STM alignment emulation
The compat alignment emulator inherited unsigned long data addresses from
the 32-bit ARM implementation.

In do_alignment_ldmstm(), nr_regs is an unsigned int holding the transfer
size. The function uses the same address addition for both transfer
directions, negating nr_regs first for a decrementing LDM or STM. The
32-bit negation wraps before the addition, so the handler adds nearly
4 GiB instead of subtracting the transfer size.
The resulting address lies outside the compat task's address space, so
decrementing LDM/STM emulation fails, while incrementing forms work.

For example, a backwards-moving copy routine using decrementing LDM/STM can
take an alignment fault when called with unaligned pointers. The compat
handler should emulate the transfer, but this bug instead causes SIGBUS.

The offset negated in do_alignment_finish_ldst() is offset_union.un, which
is already unsigned long and does not have this width mismatch.

Make nr_regs unsigned long so its negation and the address arithmetic
use the same width.

Fixes: 3fc24ef32d ("arm64: compat: Implement misalignment fixups for multiword loads")
Cc: stable@vger.kernel.org
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Assisted-by: Codex:gpt-5.6-sol
Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
Signed-off-by: Will Deacon <will@kernel.org>
2026-08-27 14:16:04 +00:00
Linus Torvalds
502d45774a Mostly the usual clk driver updates and new SoC additions plus non-critical
data fixes for things that weren't used yet. One thing that's new here in the
 core is SSC spread spectrum support (SSC) in the clk provider API. The idea is
 that DT authors will configure SSC for certain clks and they'll be configured
 at clk provider registration time or when a consumer device is probed, similar
 to how we handle assigned clk rates or parents.
 
 On the clk driver side we have Qualcomm adding almost half the diff because
 they add support for 4 different SoCs and then a long tail of other SoCs like
 Mediatek, Renesas, Rockchip, SpaceMiT, etc. add more SoC support this time
 around. Luckily it's mostly clk data for these new SoCs because the actual
 clk_ops are already there. Beyond the new drivers we get all the little fixups
 for more compilation coverage or usage of more modern APIs. That all looks
 normal.
 
 Finally, I kinda buried the lead, I'm bringing on Brian and Jerome to help out
 with maintaining the clk subsystem. The current working model is already
 semi-distributed in that silicon vendors typically take care of their drivers
 and send me pull requests but I'm becoming a bottleneck for new drivers and
 core framework review because this has become a 100% volunteer effort on my
 part. Mike is stepping down after all these years (thanks Mike!) and that jump
 started the conversation around finding co-maintainers. Brian and Jerome have
 graciously offered to help me with the work load, meaning in the future they'll
 be sending pull requests and committing directly to the clk.git tree. They've
 both been around on the list for a while, I've met them both in person, and
 they've been making changes to the core clk framework along with helping review
 patches so I'm pretty confident this will work well.
 
 Core:
  - devm_clk_bulk_get_enable() consumer API
  - devm_clk_hw_register_composite_pdata() provider API
  - Spread Spectrum Clock (SSC) support via DT bindings and provider APIs
  - Divider clk rounding improved (and tested)
 
 New Drivers:
  - Cix Sky1 audio subsystem (AUDSS)
  - UltraRISC DP1000
  - MediaTek MT8173 MFG_TOP
  - Si549
  - Aspeed AST2700 PECI
  - Airoha EN7523 PCIe
  - Rockchip RV1106
  - Mobileye EyeQ7H
  - Qualcomm Maili GCC, TCSR, RPMh, and video clks
  - Qualcomm Shikra GCC, RPM, GPU, display, and audio clks
  - Qualcomm Nord display and graphics clks
  - Qualcomm Glymur camera and EVA clks
  - Qualcomm Hawi video clks
  - Amlogic A9 AO and peripheral clks
  - Renesas R-Car X5H (R8A78000) CPG
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Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux

Pull clk updates from Stephen Boyd:
 "Mostly the usual clk driver updates and new SoC additions plus
  non-critical data fixes for things that weren't used yet.

  One thing that's new here in the core is SSC spread spectrum support
  (SSC) in the clk provider API. The idea is that DT authors will
  configure SSC for certain clks and they'll be configured at clk
  provider registration time or when a consumer device is probed,
  similar to how we handle assigned clk rates or parents.

  On the clk driver side we have Qualcomm adding almost half the diff
  because they add support for 4 different SoCs and then a long tail of
  other SoCs like Mediatek, Renesas, Rockchip, SpaceMiT, etc. add more
  SoC support this time around. Luckily it's mostly clk data for these
  new SoCs because the actual clk_ops are already there. Beyond the new
  drivers we get all the little fixups for more compilation coverage or
  usage of more modern APIs. That all looks normal.

  Finally, I kinda buried the lede, I'm bringing on Brian and Jerome to
  help out with maintaining the clk subsystem. The current working model
  is already semi-distributed in that silicon vendors typically take
  care of their drivers and send me pull requests but I'm becoming a
  bottleneck for new drivers and core framework review because this has
  become a 100% volunteer effort on my part.

  Mike is stepping down after all these years (thanks Mike!) and that
  jump started the conversation around finding co-maintainers. Brian and
  Jerome have graciously offered to help me with the work load, meaning
  in the future they'll be sending pull requests and committing directly
  to the clk.git tree. They've both been around on the list for a while,
  I've met them both in person, and they've been making changes to the
  core clk framework along with helping review patches so I'm pretty
  confident this will work well.

  Core:
   - devm_clk_bulk_get_enable() consumer API
   - devm_clk_hw_register_composite_pdata() provider API
   - Spread Spectrum Clock (SSC) support via DT bindings and provider APIs
   - Divider clk rounding improved (and tested)

  New Drivers:
   - Cix Sky1 audio subsystem (AUDSS)
   - UltraRISC DP1000
   - MediaTek MT8173 MFG_TOP
   - Si549
   - Aspeed AST2700 PECI
   - Airoha EN7523 PCIe
   - Rockchip RV1106
   - Mobileye EyeQ7H
   - Qualcomm Maili GCC, TCSR, RPMh, and video clks
   - Qualcomm Shikra GCC, RPM, GPU, display, and audio clks
   - Qualcomm Nord display and graphics clks
   - Qualcomm Glymur camera and EVA clks
   - Qualcomm Hawi video clks
   - Amlogic A9 AO and peripheral clks
   - Renesas R-Car X5H (R8A78000) CPG"

* tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (269 commits)
  clk: microchip: mpfs: fix regmap_update_bits() mask/val order
  clk: visconti: Make sure clk_init_data is fully initialized
  clk: ti: Make sure clk_init_data is fully initialized
  MAINTAINERS: Add Brian Masney and Jerome Brunet as co-maintainers for clk subsystem
  Drop Michael Turquette's clk maintainer entry
  clk: ti: composite: resolve parent clocks by DT index, not by name
  clk: ti: mux: resolve parent clocks by DT index, not by name
  clk: devres: fix cleanup in devm_clk_get_optional_enabled_with_rate()
  dt-bindings: clock: ti,keystone-gate: Convert to DT schema
  dt-bindings: clock: ti: Convert APLL clock to DT schema
  clk: zynq: pll: Fix kernel-doc after determine_rate() conversion
  dt-bindings: clock: ti,clockdomain: Convert to DT schema
  dt-bindings: clock: Correct white-space style
  clk: samsung: Don't include <linux/mod_devicetable.h>
  clk: at91: Read "reg" with helper
  clk: renesas: Add R-Car X5H CPG driver
  clk: rockchip: rk3576: fix source muxes for SPI0..SPI4
  clk: rockchip: Add clock controller for the RV1106
  dt-bindings: clock: rockchip: Add RV1106 CRU support
  dt-bindings: clock: Document Renesas R-Car X5H Clock Pulse Generator
  ...
2026-08-26 11:14:30 -07:00
Linus Torvalds
fc710de0dd remoteproc updates for v7.3
Add a remoteproc driver and binding for AMD MicroBlaze/V soft cores
 executing from dual-port BRAM, with clock and reset control and support
 for firmware without a resource table.
 
 Introduce a generic Qualcomm PAS service with SCM and OP-TEE backends,
 and migrate the PAS, MSS, and WCNSS remoteproc drivers to it. Add Nord
 ADSP and CDSP support, Eliza CDSP support, Maili ADSP/CDSP bindings, and
 late-attach SoCCP support for Kaanapali, Hawi, Maili, and Glymur. Enable
 BAM-DMUX child devices for PAS modems and fix PAS memory protection,
 handover, shutdown, and resource lifetime handling.
 
 Harden remoteproc lifecycle handling by attaching asynchronously,
 stopping crashed processors, synchronizing crash work with removal, and
 forcing shutdown before device resources are released. Reallocate
 resources during attach recovery and fix several reference and error-path
 leaks.
 
 Add Xilinx R5 crash detection and move RPU start and stop sequencing into
 the platform firmware driver. Consolidate write-combining carveout
 mapping callbacks, use correct I/O-memory accessors, and share optional
 ELF resource-table handling across drivers.
 
 Convert the TI Wakeup M3 binding to DT schema, correct Qualcomm and
 generic remoteproc bindings, and harden resource-table iteration against
 signed-offset out-of-bounds accesses.
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Merge tag 'rproc-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux

Pull remoteproc updates from Bjorn Andersson:
 "Add a remoteproc driver and binding for AMD MicroBlaze/V soft cores
  executing from dual-port BRAM, with clock and reset control and
  support for firmware without a resource table.

  Introduce a generic Qualcomm PAS service with SCM and OP-TEE backends,
  and migrate the PAS, MSS, and WCNSS remoteproc drivers to it. Add Nord
  ADSP and CDSP support, Eliza CDSP support, Maili ADSP/CDSP bindings,
  and late-attach SoCCP support for Kaanapali, Hawi, Maili, and Glymur.
  Enable BAM-DMUX child devices for PAS modems and fix PAS memory
  protection, handover, shutdown, and resource lifetime handling.

  Harden remoteproc lifecycle handling by attaching asynchronously,
  stopping crashed processors, synchronizing crash work with removal,
  and forcing shutdown before device resources are released. Reallocate
  resources during attach recovery and fix several reference and
  error-path leaks.

  Add Xilinx R5 crash detection and move RPU start and stop sequencing
  into the platform firmware driver. Consolidate write-combining
  carveout mapping callbacks, use correct I/O-memory accessors, and
  share optional ELF resource-table handling across drivers.

  Convert the TI Wakeup M3 binding to DT schema, correct Qualcomm and
  generic remoteproc bindings, and harden resource-table iteration
  against signed-offset out-of-bounds accesses"

* tag 'rproc-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux: (60 commits)
  remoteproc: fix OOB read via signed offset in rsc_table_for_each_entry()
  remoteproc: replace BSD blurb with SPDX identifier in rsc_table.h
  remoteproc: replace BSD blurb with SPDX identifier in remoteproc.h
  remoteproc: fix coding style issues in remoteproc.h
  MAINTAINERS: add rsc_table.h to remoteproc entry
  remoteproc: qcom: pas: Add Nord ADSP and CDSP support
  dt-bindings: remoteproc: qcom,nord-pas: Document Nord PAS
  remoteproc: qcom: pas: Drop unused dtb_mem_region field
  remoteproc: qcom: pas: Map/unmap subsystem region before auth_and_reset
  remoteproc: qcom: pas: Fix the PAS context creation placement
  remoteproc: qcom: pas: Guard dtb metadata release with dtb_pas_id check
  remoteproc: qcom: annotate mem_region fields with __iomem
  arm64: dts: qcom: eliza: Add fallback compatible for ADSP remoteproc
  dt-bindings: remoteproc: qcom,milos-pas: Move Eliza ADSP to SM8550 schema
  remoteproc: qcom: pas: Add Eliza CDSP support
  dt-bindings: remoteproc: qcom,sm8550-pas: Add Eliza CDSP compatible
  remoteproc: qcom: q6v5: Request shutdown if crash is triggered host-side
  remoteproc: Force shutdown during device removal
  remoteproc: Prevent crash handling to race with rproc_del()
  remoteproc: Allow shutdown of crashed processors
  ...
2026-08-25 14:03:31 -07:00
Linus Torvalds
7bb6284aa7 Arm:
* Add support for 'slot' based PMU events, paired with new UAPI that
   compels the user to select a specific PMU implementation
 
 * Lazy save/restore of vCPU state for pKVM, along with various fixes
   and cleanups to the management of vCPU state between the untrusted
   host and pKVM hypervisor
 
 * Disable traps of EL1 registers for nested hypervisors when FEAT_NV2p1
   is present, guaranteeing that EL2-specific register bits are stateful
   in the EL1 counterpart
 
 * Leverage FEAT_NV3 to avoid unnecessary ERET/TLBI traps when the scope
   of those instructions remains 'in host' (i.e. L1 kernel/userspace)
 
 * Pile of fixes for the management of the VNCR pseudo-TLB, such as
   under-invalidations and races with concurrent TLBIs on other vCPUs
 
 * Consolidate the non-protected and pKVM view of ICH_VTR_EL2 to a
   runtime-patched constant, allowing the same data to be shared with
   pKVM prior to dropping host privileges
 
 * Considerable pile of LLM-assisted fixes around the shop but mostly in
   the VGIC, our in-kernel generator of bugs (and sometimes interrupts)
 
 LoongArch:
 
 * Advertise already-supported capabilities.
 
 * Some bug fixes about timer and MMIO.
 
 * Some hardening about interrupt injection.
 
 * Replace kvm_err() with kvm_pr_unimpl().
 
 * Add FPU/LSX/LASX test cases for selftests.
 
 RISC-V:
 
 * Svadu/Zicfiss/Zicfilp FWFT support for Guest
 
 * Use try_cmpxchg for IMSIC MRIF RMW
 
 * More arch-specific tracepoints in KVM RISC-V
 
 * Eager page splitting when enabling dirty logging
 
 * Optimize hfence request handling for SMP Guests
 
 * Improve dirty log clearing by skipping zero bits in mask
 
 * Guard HFENCE range loops against overflow
 
 * CPU PM notifiers in KVM RISC-V for non-retentive idle states
 
 * Fix kernel-mode vector context save/restore for Guest
 
 s390:
 
 * Fixes for vfio-ap
 
 * Fixes for the gmap rework
 
 * Fixes for vsie
 
 * AI triggered fixes all over
 
 * diag9c tracing
 
 * code move preparation for the additional arm64 support
 
 * enable CONTEXT_ANALYSIS
 
 x86:
 
 * Perform spring cleaning on x86.{c,h} and asm/kvm_host.h, by adding regs.c
   (the kvm_cache_regs.h => regs.h is already applied) and msrs.{c,h}, and moving
   relevant code out of x86.c.
 
 * Split kvm_mmu in three parts, respectively to describe the format of page
   tables, walking the guest page tables and building the page tables.  Always
   use the same page table walker kvm->arch.gva_walk as the entry point to
   convert a guest's virtual address, where the previous code used two
   different kvm_mmu structs depending on whether the walk included nested
   EPT/NPT or not.  Make page fault vmexits reuse the permission checking
   machinery that is used for guest page faults.  This is both a cleanup
   and a baby step towards supporting XS/XU memory permissions.
 
 * Document some of the "fun" gotchas with the APIC base when creating IRQCHIPs
   on x86.
 
 * Remove a defunct masterclock update from kvm_xen_shared_info_init().  It
   could result in incorrect kvmclock due to triggering an unnecessary
   switch to/from masterclock mode.
 
 * Skip Xen runstate time updates if time has effectively gone backwards, so
   that the guest doesn't report 100% steal time for a very, very long time.
 
 * Drop KVM's runtime updates of the Xen PV timing CPUID leaf, as KVM was
   updating the wrong sub-leaf, and upstream KVM will soon provide all the
   information needed by userspace to populate the CPUID field itself.
 
 * Fix a bug where KVM would walk a newly created rmap without holding the rmap
   lock (or mmu_lock) during aging.
 
 * Fix a bug where aging TDP MMU SPTEs could clobber FROZEN SPTEs.
 
 * Fix a variety of #DB priority bugs.
 
 * Fix a class of races related to enabling Hyper-V emulation on a vCPU after
   the vCPU is visible to the rest of KVM.
 
 * Use static calls for nested virtualization ops.
 
 * Move more KVM-internal code out of x86's kvm_host.h.
 
 * Enumerate support for a variety of Zhaoxin instructions that don't require
   explicit virtualization.
 
 * Fix missing EFER validation bugs, including in the KVM_SET_SREGS* path.
 
 * Harden kvm_vcpu_map() against double-mapping and thus leaking references.
 
 * Misc fixes and cleanups, e.g. for largely benign syzkaller splats.
 
 x86 (Intel):
 
 * Zero a vCPU's entry in VMX's Posted Interrupt Descriptor table used for IPI
   virtualization when the vCPU is freed, to fix a use-after-free where hardware
   will write to a freed vCPU's PID.
 
 * Service local TLB flushes on a failed nested VM-Enter to fix a bug where KVM
   could miss a TLB on a future, successful VM-Enter with the same L2 VPID.
 
 * Cap the maximum value shoved into the VMX Preemption Timer to workaround an
   erratum that affects all existing Intel CPUs that support CPUID 0x15.
 
 * Fix VPID virtualization bugs where KVM would fail to flush hardware TLBs.
 
 * Harden the TDX "populate" ioctls against bad input, and to prepare
   for supporting in-place private<=>shared conversion.
 
 x86 (AMD):
 
 * Forcefully invalidate SNP VMSA pages if their backing guest_memfd page is
   zapped/invalidated, e.g. due to a PUNCH_HOLE in response to a Page-State
   Change request.
 
 * Remove a dying VM from the GA Log notifier list before the VM is actually
   destroyed, to fix a potential use-after-free.
 
 * While FOLL_WRITE was needed in the past to trigger CoW unsharing, nowadays
   FOLL_LONGTERM does that already even without FOLL_WRITE, and in fact,
   get_user_pages() actually disallows FOLL_WRITE together with FOLL_LONGTERM.
   So don't pass FOLL_WRITE when registering encrypted memory regions, i.e. when
   pinning SEV/SEV-ES guest memory, to fix a regression with file-backed memory
   introduced by KVM's (correct) usage of long-term pins.
 
   (This was reviewed by mm maintainers; for more information, see commit
   ee1a586dd1).
 
 * Allocate full pages for SEV/SEV-ES {DE,EN}CRYPT ops on SNP-enabled hosts to
   fix a data corruption issue due to the PSP driver assigning to-be-written
   pages to firmware (as required by the SNP specs).
 
 * Unconditionally intercept ICBEP so that KVM generates the correct guest RIP
   when handling an ICEBP-induced TASK_SWITCH #VMEXIT.
 
 * Harden the SNP "populate" ioctls against bad input, and to prepare
   for supporting in-place private<=>shared conversion.
 
 Generic:
 
 * Remove kvm_debugfs_dir if kvm_init() fails after creating KVM's debugfs.
 
 * Add a per-VM bitmap to track which vCPU IDs have been "claimed" but for
   which the vCPU isn't yet online, and use the bitmap to reject duplicate IDs
   before calling into arch code.  This allows arch code to consume vcpu_id
   without having to worry about cross-vCPU clobbering (at least s390 and x86
   have had related bugs).
 
 * Rework the so called "prepare" and "invalidate" guest_memfd hooks to prepare
   for in-place private<=>shared conversion, and clean up a few warts along the
   way.
 
 Selftests:
 
 * Automatically allocate a full page for L2 guest stacks on x86 instead of
   requiring test-specific L1 guest code to carve out a portion of the L1
   stack for L2 usage, and to ensure the L2 stack also adheres to the x86-64
   calling convention ABI.
 
 * Add a selftest to verify {Guest,Host}-Only behavior in x86's mediated PMU.
 
 * Clean up nested SVM's handling of GPRs on L2<=>L1 transitions, reuse the
   functionality for nested VMX, and drop the ucall hack that was fudging
   around the lack of GPR switching on nVMX.
 
 * Add a stress test to verify KVM doesn't clobber/drop #PF state, e.g. CR2,
   across save/restore, including when L2 is active.
 
 * Add a test to verify KVM_CREATE_VM accepts exactly what is reported by
   KVM_CAP_VM_TYPES.
 
 * Misc selftests fixes and cleanups
 
 * Fix several issues with seeding the pRNG, and rework the pRNG APIs to that
   the pRNG can be sanely used in host code, not just guest code.
 
 * Add an IRQ test to validate virtual IRQ deliverty for IRQs wired up via
   KVM_IRQFD + KVM_SET_GSI_ROUTING, with optional support for triggering IRQs
   via writes to an assigned VFIO device.
 
 * Add syscall wrappers to assert success on a variety of pthreads and CPU
   affinity APIs.
 
 * Set vCPU pthread affinity as early as possible to reduce contention issues
   that were surfaced by PREEMPT_LAZY, which result in runtimes of over a
   minute on large hosts, versus the expected ~5 seconds.
 
 * Rework the PMU counters test to run each testcase using a single VM with
   many vCPUs for each sub-testcase, instead of using a unique VM for each
   sub-testcase.  This cuts the runtime by ~20x.
 
 Miscellaneous:
 
 * MAINTAINERS updates for vfio-ap, guest_memfd, kvm-x86.  Mostly representing
   the status quo more accurately, but also... welcome David Hildenbrand
   as guest_memfd reviewer!
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm updates from Paolo Bonzini:
 "ARM64:

   - Add support for 'slot' based PMU events, paired with new UAPI that
     compels the user to select a specific PMU implementation

   - Lazy save/restore of vCPU state for pKVM, along with various fixes
     and cleanups to the management of vCPU state between the untrusted
     host and pKVM hypervisor

   - Disable traps of EL1 registers for nested hypervisors when
     FEAT_NV2p1 is present, guaranteeing that EL2-specific register bits
     are stateful in the EL1 counterpart

   - Leverage FEAT_NV3 to avoid unnecessary ERET/TLBI traps when the
     scope of those instructions remains 'in host' (i.e. L1
     kernel/userspace)

   - Pile of fixes for the management of the VNCR pseudo-TLB, such as
     under-invalidations and races with concurrent TLBIs on other vCPUs

   - Consolidate the non-protected and pKVM view of ICH_VTR_EL2 to a
     runtime-patched constant, allowing the same data to be shared with
     pKVM prior to dropping host privileges

   - Considerable pile of LLM-assisted fixes around the shop but mostly
     in the VGIC, our in-kernel generator of bugs (and sometimes
     interrupts)

  LoongArch:

   - Advertise already-supported capabilities

   - Some bug fixes about timer and MMIO

   - Some hardening about interrupt injection

   - Replace kvm_err() with kvm_pr_unimpl()

   - Add FPU/LSX/LASX test cases for selftests

  RISC-V:

   - Svadu/Zicfiss/Zicfilp FWFT support for Guest

   - Use try_cmpxchg for IMSIC MRIF RMW

   - More arch-specific tracepoints in KVM RISC-V

   - Eager page splitting when enabling dirty logging

   - Optimize hfence request handling for SMP Guests

   - Improve dirty log clearing by skipping zero bits in mask

   - Guard HFENCE range loops against overflow

   - CPU PM notifiers in KVM RISC-V for non-retentive idle states

   - Fix kernel-mode vector context save/restore for Guest

  s390:

   - Fixes for vfio-ap

   - Fixes for the gmap rework

   - Fixes for vsie

   - AI triggered fixes all over

   - diag9c tracing

   - code move preparation for the additional arm64 support

   - enable CONTEXT_ANALYSIS

  x86:

   - Perform spring cleaning on x86.{c,h} and asm/kvm_host.h, by adding
     regs.c (the kvm_cache_regs.h => regs.h is already applied) and
     msrs.{c,h}, and moving relevant code out of x86.c

   - Split kvm_mmu in three parts, respectively to describe the format
     of page tables, walking the guest page tables and building the page
     tables. Always use the same page table walker kvm->arch.gva_walk as
     the entry point to convert a guest's virtual address, where the
     previous code used two different kvm_mmu structs depending on
     whether the walk included nested EPT/NPT or not. Make page fault
     vmexits reuse the permission checking machinery that is used for
     guest page faults. This is both a cleanup and a baby step towards
     supporting XS/XU memory permissions

   - Document some of the "fun" gotchas with the APIC base when creating
     IRQCHIPs on x86

   - Remove a defunct masterclock update from kvm_xen_shared_info_init().
     It could result in incorrect kvmclock due to triggering an
     unnecessary switch to/from masterclock mode

   - Skip Xen runstate time updates if time has effectively gone
     backwards, so that the guest doesn't report 100% steal time for
     a very, very long time

   - Drop KVM's runtime updates of the Xen PV timing CPUID leaf, as KVM
     was updating the wrong sub-leaf, and upstream KVM will soon provide
     all the information needed by userspace to populate the CPUID field
     itself

   - Fix a bug where KVM would walk a newly created rmap without holding
     the rmap lock (or mmu_lock) during aging

   - Fix a bug where aging TDP MMU SPTEs could clobber FROZEN SPTEs

   - Fix a variety of #DB priority bugs

   - Fix a class of races related to enabling Hyper-V emulation on a
     vCPU after the vCPU is visible to the rest of KVM

   - Use static calls for nested virtualization ops

   - Move more KVM-internal code out of x86's kvm_host.h

   - Enumerate support for a variety of Zhaoxin instructions that don't
     require explicit virtualization

   - Fix missing EFER validation bugs, including in the KVM_SET_SREGS*
     path

   - Harden kvm_vcpu_map() against double-mapping and thus leaking
     references

   - Misc fixes and cleanups, e.g. for largely benign syzkaller splats

  x86 (Intel):

   - Zero a vCPU's entry in VMX's Posted Interrupt Descriptor table used
     for IPI virtualization when the vCPU is freed, to fix a
     use-after-free where hardware will write to a freed vCPU's PID

   - Service local TLB flushes on a failed nested VM-Enter to fix a bug
     where KVM could miss a TLB on a future, successful VM-Enter with
     the same L2 VPID

   - Cap the maximum value shoved into the VMX Preemption Timer to
     workaround an erratum that affects all existing Intel CPUs that
     support CPUID 0x15

   - Fix VPID virtualization bugs where KVM would fail to flush hardware
     TLBs

   - Harden the TDX "populate" ioctls against bad input, and to prepare
     for supporting in-place private<=>shared conversion

  x86 (AMD):

   - Forcefully invalidate SNP VMSA pages if their backing guest_memfd
     page is zapped/invalidated, e.g. due to a PUNCH_HOLE in response to
     a Page-State Change request

   - Remove a dying VM from the GA Log notifier list before the VM is
     actually destroyed, to fix a potential use-after-free

   - While FOLL_WRITE was needed in the past to trigger CoW unsharing,
     nowadays FOLL_LONGTERM does that already even without FOLL_WRITE,
     and in fact, get_user_pages() actually disallows FOLL_WRITE
     together with FOLL_LONGTERM. So don't pass FOLL_WRITE when
     registering encrypted memory regions, i.e. when pinning SEV/SEV-ES
     guest memory, to fix a regression with file-backed memory
     introduced by KVM's (correct) usage of long-term pins

     (This was reviewed by mm maintainers; for more information, see
     commit ee1a586dd1 "KVM: SEV: Drop FOLL_WRITE for encrypted region
     registration")

   - Allocate full pages for SEV/SEV-ES {DE,EN}CRYPT ops on SNP-enabled
     hosts to fix a data corruption issue due to the PSP driver
     assigning to-be-written pages to firmware (as required by the SNP
     specs)

   - Unconditionally intercept ICBEP so that KVM generates the correct
     guest RIP when handling an ICEBP-induced TASK_SWITCH #VMEXIT

   - Harden the SNP "populate" ioctls against bad input, and to prepare
     for supporting in-place private<=>shared conversion

  Generic:

   - Remove kvm_debugfs_dir if kvm_init() fails after creating KVM's
     debugfs

   - Add a per-VM bitmap to track which vCPU IDs have been "claimed" but
     for which the vCPU isn't yet online, and use the bitmap to reject
     duplicate IDs before calling into arch code. This allows arch code
     to consume vcpu_id without having to worry about cross-vCPU
     clobbering (at least s390 and x86 have had related bugs)

   - Rework the so called "prepare" and "invalidate" guest_memfd hooks
     to prepare for in-place private<=>shared conversion, and clean up a
     few warts along the way

  Selftests:

   - Automatically allocate a full page for L2 guest stacks on x86
     instead of requiring test-specific L1 guest code to carve out a
     portion of the L1 stack for L2 usage, and to ensure the L2 stack
     also adheres to the x86-64 calling convention ABI

   - Add a selftest to verify {Guest,Host}-Only behavior in x86's
     mediated PMU

   - Clean up nested SVM's handling of GPRs on L2<=>L1 transitions,
     reuse the functionality for nested VMX, and drop the ucall hack
     that was fudging around the lack of GPR switching on nVMX

   - Add a stress test to verify KVM doesn't clobber/drop #PF state,
     e.g. CR2, across save/restore, including when L2 is active

   - Add a test to verify KVM_CREATE_VM accepts exactly what is reported
     by KVM_CAP_VM_TYPES

   - Misc selftests fixes and cleanups

   - Fix several issues with seeding the pRNG, and rework the pRNG APIs
     to that the pRNG can be sanely used in host code, not just guest
     code

   - Add an IRQ test to validate virtual IRQ deliverty for IRQs wired up
     via KVM_IRQFD + KVM_SET_GSI_ROUTING, with optional support for
     triggering IRQs via writes to an assigned VFIO device

   - Add syscall wrappers to assert success on a variety of pthreads and
     CPU affinity APIs

   - Set vCPU pthread affinity as early as possible to reduce contention
     issues that were surfaced by PREEMPT_LAZY, which result in runtimes
     of over a minute on large hosts, versus the expected ~5 seconds

   - Rework the PMU counters test to run each testcase using a single VM
     with many vCPUs for each sub-testcase, instead of using a unique VM
     for each sub-testcase. This cuts the runtime by ~20x

  Miscellaneous:

   - MAINTAINERS updates for vfio-ap, guest_memfd, kvm-x86. Mostly
     representing the status quo more accurately, but also... welcome
     David Hildenbrand as guest_memfd reviewer!"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (413 commits)
  KVM: arm64: Validate GICv5 timer PPIs before claiming ownership
  KVM: arm64: vgic: Reject out-of-range GICv5 PPI IDs
  KVM: arm64: vgic: Prevent speculative SPI array underflow
  KVM: arm64: vgic: Free gic_kvm_info on initialization failure
  KVM: arm64: Avoid mismatched accesses to 'struct kvm_nvhe_init_params'
  s390/vfio-ap: Fix NULL deref in status_show() during queue probe
  s390/vfio-ap: Fix hot-unplug skipped when last AP adapter or domain removed
  s390/vfio-ap: fix potential use of uninitialized apm_filtered bitmap
  s390/vfio-ap: Fix control domain removal in vfio_ap_mdev_cfg_remove
  s390/vfio-ap: Fix required lock not held during update of ap_matrix_mdev object
  s390/vfio-ap: Fix missing lock required to access list of ap_matrix_mdev objects
  s390/vfio-ap: Fix dereference matrix_mdev->kvm without checking for NULL
  s390/vfio-ap: Fix stale do_remove flag across iterations in vfio_ap_mdev_cfg_remove
  RISC-V: KVM: fix vcpu vector context handling for kernel-mode vector
  riscv: vector: allow non-preemptible kernel-mode vector with IRQs off
  riscv: vector: refactor riscv_v_start_kernel_context
  KVM: s390: gmap: Make prefix handling optional
  KVM: s390: gmap: Make CMMA optional
  KVM: s390: gmap: Make storage keys optional
  KVM: s390: Prepare gmap for a second KVM implementation
  ...
2026-08-25 11:48:04 -07:00
Linus Torvalds
70f5376dbd TTY / Serial driver updates for 7.3-rc1
Here is the "big" set of tty and serial driver updates for 7.3-rc1.  Not
 really all that much happened this development cycle for this subsystem,
 changes in here are:
   - removal of the ipwireless driver as it's no longer used or needed
   - new 8250_mxpcie driver added
   - qcom serial driver updates and additions
   - vt mode validation addition
   - lots of other small serial driver updates and additions
 
 All of these have been in linux-next for weeks with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull TTY / serial driver updates from Greg KH:
 "Here is the "big" set of tty and serial driver updates for 7.3-rc1.

  Not really all that much happened this development cycle for this
  subsystem, changes in here are:

   - removal of the ipwireless driver as it's no longer used or needed

   - new 8250_mxpcie driver added

   - qcom serial driver updates and additions

   - vt mode validation addition

   - lots of other small serial driver updates and additions

  All of these have been in linux-next for weeks with no reported issues"

* tag 'tty-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (97 commits)
  serial: imx: serialize imx_uart_ports[] lifetime
  tty: clear cdev pointer after cdev_add() failure
  tty: skip cdev_del() when no cdev is registered
  serial: core: clear freed pointers on uart_register_driver() failure
  serial: core: do fallible allocations before the console can be registered
  serial: 8250_mxpcie: implement rx_trig_bytes callbacks via MUEx50 RTL
  serial: 8250_mxpcie: introduce per-port private data structure
  serial: 8250: allow UART drivers to override rx_trig_bytes handling
  serial: 8250_mxpcie: add break support for RS485 using MUEx50 features
  serial: 8250: allow low-level drivers to override break control
  serial: 8250_mxpcie: support serial interface mode switching
  serial: 8250_mxpcie: speed up TX using memory-mapped FIFO window
  serial: 8250_mxpcie: speed up RX using memory-mapped FIFO window
  serial: 8250_mxpcie: add custom handle_irq callback
  serial: 8250_mxpcie: offload XON/XOFF flow control to MUEx50 hardware
  serial: 8250_mxpcie: enable automatic RTS/CTS flow control
  serial: 8250_mxpcie: enable enhanced mode and program FIFO trigger levels
  serial: 8250: add Moxa MUEx50 UART port type
  serial: 8250: split Moxa PCIe serial board support out of 8250_pci
  serial: qcom-geni: Use geni_se_set_perf_level() for baud rate perf level
  ...
2026-08-25 10:59:12 -07:00
Linus Torvalds
2f43193b88 dma-mapping updates for Linux 7.3:
- swiotlb: added new configuration option for the default pool size
 (Jagadeesh Pagadala) and reduced overhead for high watermark tracking
 (chenhuguanshen)
 
 - minor code cleanups and improvements (Vova Sharaienko, Honglei Huang
 and Marek Szyprowski)
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mergetag object 04a19b35dc
 type commit
 tag dma-mapping-7.3-2026-08-24-2
 tagger Marek Szyprowski <m.szyprowski@samsung.com> 1787582472 +0200
 
 second dma-mapping update for Linux 7.3:
 
 - important dma-mapping update for confidential-computing, which adds
 proper tracking of the shared DMA state through direct, pool and swiotlb
 paths (Aneesh Kumar K.V)
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Merge tags 'dma-mapping-7.3-2026-08-24' and 'dma-mapping-7.3-2026-08-24-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux

Pull dma-mapping updates from Marek Szyprowski:

 - swiotlb:
     - new configuration option for the default pool size
       (Jagadeesh Pagadala)
     - reduce overhead for high watermark tracking (chenhuguanshen)

 - minor code cleanups and improvements (Vova Sharaienko, Honglei Huang
   and Marek Szyprowski)

 - add proper tracking of the shared DMA state through direct, pool and
   swiotlb paths (Aneesh Kumar K.V)

   This is important for confidential-computing

* tag 'dma-mapping-7.3-2026-08-24' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux:
  dma/swiotlb: decouple high watermark tracking from CONFIG_DEBUG_FS
  MAINTAINERS: update tree for DMA MAPPING HELPERS
  dma/swiotlb: introduce Kconfig option for compile-time default pool size
  dma-direct: Improve readability of the dma_direct_map_sg() for P2PDMA case
  iommu/dma: simplify dma_iova_destroy() and drop the free_iova helper
  dma-coherent: use KiB in DMA allocation logs
  dma-coherent: fix spacing coding style issue

* tag 'dma-mapping-7.3-2026-08-24-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux: (23 commits)
  swiotlb: remove unused SWIOTLB_FORCE flag
  dma: swiotlb: handle set_memory_decrypted() failures
  dma: swiotlb: free dynamic pools from process context
  dma-direct: rename ret to cpu_addr in alloc helpers
  dma-direct: select DMA address encoding from __DMA_ATTR_ALLOC_CC_SHARED
  dma-direct: set decrypted flag for remapped DMA allocations
  dma-direct: make dma_direct_map_phys() honor DMA_ATTR_CC_SHARED
  dma-direct: Move dma_direct_map_phys() to dma/direct.c
  dma-direct: pass attrs to dma_capable() for DMA_ATTR_CC_SHARED checks
  dma-mapping: make dma_pgprot() honor __DMA_ATTR_ALLOC_CC_SHARED
  dma: swiotlb: track pool encryption state and honor DMA_ATTR_CC_SHARED
  dma: swiotlb: pass mapping attributes by reference
  dma-pool: track decrypted atomic pools and select them via attrs
  dma-direct: use __DMA_ATTR_ALLOC_CC_SHARED in alloc/free paths
  dma-mapping: Add internal shared allocation attribute
  coco: arm64: s390: powerpc: Mark secure guests with CC_ATTR_GUEST_MEM_ENCRYPT
  dma-direct: swiotlb: handle swiotlb alloc/free outside __dma_direct_alloc_pages
  s390: Expose protected virtualization through cc_platform_has()
  swiotlb: Preserve allocation virtual address for dynamic pools
  dma: free atomic pool pages by physical address
  ...
2026-08-24 11:35:46 -07:00
Paolo Bonzini
76671054f9 KVM/arm64 changes for 7.3
- Add support for 'slot' based PMU events, paired with new UAPI that
    compels the user to select a specific PMU implementation
 
  - Lazy save/restore of vCPU state for pKVM, along with various fixes
    and cleanups to the management of vCPU state between the untrusted
    host and pKVM hypervisor
 
  - Disable traps of EL1 registers for nested hypervisors when FEAT_NV2p1
    is present, guaranteeing that EL2-specific register bits are stateful
    in the EL1 counterpart
 
  - Leverage FEAT_NV3 to avoid unnecessary ERET/TLBI traps when the scope
    of those instructions remains 'in host' (i.e. L1 kernel/userspace)
 
  - Pile of fixes for the management of the VNCR pseudo-TLB, such as
    under-invalidations and races with concurrent TLBIs on other vCPUs
 
  - Consolidate the non-protected and pKVM view of ICH_VTR_EL2 to a
    runtime-patched constant, allowing the same data to be shared with
    pKVM prior to dropping host privileges
 
  - Considerable pile of LLM-assisted fixes around the shop but mostly in
    the VGIC, our in-kernel generator of bugs (and sometimes interrupts)
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Merge tag 'kvmarm-7.3' of https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 changes for 7.3

 - Add support for 'slot' based PMU events, paired with new UAPI that
   compels the user to select a specific PMU implementation

 - Lazy save/restore of vCPU state for pKVM, along with various fixes
   and cleanups to the management of vCPU state between the untrusted
   host and pKVM hypervisor

 - Disable traps of EL1 registers for nested hypervisors when FEAT_NV2p1
   is present, guaranteeing that EL2-specific register bits are stateful
   in the EL1 counterpart

 - Leverage FEAT_NV3 to avoid unnecessary ERET/TLBI traps when the scope
   of those instructions remains 'in host' (i.e. L1 kernel/userspace)

 - Pile of fixes for the management of the VNCR pseudo-TLB, such as
   under-invalidations and races with concurrent TLBIs on other vCPUs

 - Consolidate the non-protected and pKVM view of ICH_VTR_EL2 to a
   runtime-patched constant, allowing the same data to be shared with
   pKVM prior to dropping host privileges

 - Considerable pile of LLM-assisted fixes around the shop but mostly in
   the VGIC, our in-kernel generator of bugs (and sometimes interrupts)
2026-08-24 12:42:07 -04:00
Linus Torvalds
cf9610f911 Pin control bulk changes for kernel v7.3
Core changes:
 
 - Use the non-blocking mux_state_try_select() in the generic
   MUX pin control back-end.
 
 - Free pin maps on pinctrl_generic_to_map() failure in the core
   helpers.
 
 New drivers:
 
 - Qualcomm Maili TLMM SoC pin control.
 
 - Qualcomm PMG1110 PMIC pin control.
 
 - Qualcomm Eliza LPASS LPI TLMM SoC pin control (this is for
   the low power audio, LPASS = Low Power Audio SubSystem
   portions).
 
 - Upboard support on top of the Intel pin controller.
 
 - Apple T6030 and T6031 support (just compatible strings).
 
 - Samsung Exynos 8855 SoC pin control.
 
 - Mediatek MT6858 SoC pin control.
 
 - Rockchip RK3308B SoC pin control.
 
 - Rockchip RV1106 SoC pin control.
 
 - Airoha EN7523 SoC pin control.
 
 - Airoha AN7563 SoC pin control.
 
 Improvements:
 
 - Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable.
 
 - Qualcomm improvements on top of the Qualcomm PDC (power domain
   controller) irqchip improvements from tglx:s tree.
 
 - Qualcomm IPQ806x and IPQ9650 nonurgent pin grop fixups.
 
 - The NPCM8xx driver has been put into shape fixing many pin and
   group definitions.
 
 - Some nonurgent Tegra 264 pin assignments are fixed up.
 
 - Some nonurgent fixups to Airoha AN7581 and AN7583 registers and
   pin assignments, missing features etc.
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Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Pull pin control updates from Linus Walleij:
 "Core changes:

   - Use the non-blocking mux_state_try_select() in the generic MUX pin
     control back-end

   - Free pin maps on pinctrl_generic_to_map() failure in the core
     helpers

  New hardware pin control:

   - Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC
     (this is for the low power audio, LPASS = Low Power Audio SubSystem
     portions)

   - Upboard support on top of the Intel pin controller

   - Apple T6030 and T6031 support (just compatible strings)

   - Samsung Exynos 8855 SoC

   - Mediatek MT6858 SoC

   - Rockchip RK3308B and RV1106 SoCs

   - Airoha EN7523 and AN7563 SoCs

  Improvements:

   - Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable

   - Qualcomm improvements on top of the Qualcomm PDC (power domain
     controller) irqchip improvements from tglx:s tree

   - Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups

   - The NPCM8xx driver has been put into shape fixing many pin and
     group definitions

   - Some non-urgent Tegra 264 pin assignments are fixed up

   - Some non-urgent fixups to Airoha AN7581 and AN7583 registers and
     pin assignments, missing features etc"

* tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits)
  dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema
  pinctrl: meson: sync some modify from A4
  pinctrl: meson: a4: Add input enable pin configuration
  pinctrl: realtek: rtd1625: remove unused group name spdif_sel
  pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13
  dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema
  Revert "Merge branch 'ib-rsk7204' into devel"
  pinctrl: rockchip: Add RV1106 pinctrl support
  dt-bindings: pinctrl: rockchip: Add RV1106 compatible
  pinctrl: rockchip: Decode drive strength in the get function
  pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable
  pinctrl: airoha: add support of an7563 SoC
  dt-bindings: pinctrl: airoha: add support of an7563 pin controller
  pinctrl: airoha: try to find chip scu node by phandle first
  pinctrl: airoha: add support of en7523 SoC
  dt-bindings: pinctrl: airoha: add support of en7523 pin controller
  pinctrl: airoha: an7583: add support for olt pinmux
  pinctrl: airoha: an7583: add support for pon_alt pinmux
  pinctrl: airoha: an7583: add support for npu_uart pinmux
  dt-bindings: pinctrl: airoha: an7583: add missed features
  ...
2026-08-24 08:46:03 -07:00
Vladimir Murzin
b8f070ac31 arm64: process: Fix context switching MTE store-only tag check
SCTLR_EL1.TCSO0 is set when user opt-in for MTE store-only tag check
mode. However, it is not part of SCTLR_USER_MASK which imply that on
context switch we never clear SCTLR_EL1.TCSO0, so we are leaking that
setting into another task.

Fix that by including SCTLR_EL1_TCSO0_MASK into SCTLR_USER_MASK

Fixes: 4d51ff5bba ("arm64/kernel: Support store-only mte tag check")
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Yeoreum Yun <yeoreum.yun@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
2026-08-24 14:11:25 +00:00
Wei-Lin Chang
beca1b97a2 KVM: arm64: ptdump: Flush the last region
Currently the stage-2 ptdump calls note_page() at each leaf entry visit.
This simply misses the output of the last region, because note_page()
only dumps output when it detects a change in level/prot, or when the
walk enters a next marker section. The last region in the guest IPA
space with the same level/prot is not dumped since there is no change
after it.

Call note_page_flush() to dump the final region. note_page_flush()
uses ptdump_pg_state.end_address to call the final note_page(), so also
provide the end address.

Also change the second marker's start address to ULONG_MAX so we never
cross it. This avoids dumping redundant marker names (which are NULL),
and advancing beyond the end of the marker array.

Fixes: 7c4f73548e ("KVM: arm64: Register ptdump with debugfs on guest creation")
Reported-by: Sashiko AI <sashiko-bot@kernel.org>
Closes: https://lore.kernel.org/kvmarm/20260630122758.891011F00A3A@smtp.kernel.org/
Reviewed-by: Dev Jain <dev.jain@arm.com>
Tested-by: Dev Jain <dev.jain@arm.com>
Signed-off-by: Wei-Lin Chang <weilin.chang@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
2026-08-24 13:31:19 +00:00
Wei-Lin Chang
902caade3c arm64: ptdump: Make note_page_flush() range aware
note_page_flush() calls note_page() with addr == 0 and level == -1 to
dump the last row of a ptdump. addr == 0 (1 << 64 wrapped around)
renders a huge region with enormous size for address spaces with
IA bits < 64. For example the stage-2 page tables and the EFI runtime
page table.

More importantly, the last region of the address space and everything
after the address space up to 1 << 64 are merged into one row of
output. If the last region within the address space is valid, it will
appear to remain valid up to 1 << 64 with the same attributes.

Currently only the EFI runtime ptdump is affected by this, but KVM will
soon fix its stage-2 ptdump by using note_page_flush(). Here is an
example of an EFI runtime ptdump (last row):

0x0000008000000000-0x0000000000000000   17179868672G PGD

With this patch:

0x0000008000000000-0x0001000000000000      261632G PGD

To fix this, cache the end address of a ptdump in ptdump_pg_state so
note_page_flush() can call the final note_page() with the correct end
address.

Fixes: 9d80448ac9 ("efi/arm64: Add debugfs node to dump UEFI runtime page tables")
Signed-off-by: Wei-Lin Chang <weilin.chang@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
2026-08-24 13:31:19 +00:00
Linus Torvalds
570f7e331f pci-v7.3-changes
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Merge tag 'pci-v7.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci

Pull PCI updates from Bjorn Helgaas:
 "Resource management:

   - Add hotplug reservation only once (not at each level of the
     hierarchy) so bridge windows don't grow more than necessary (Ilpo
     Järvinen)

  Driver binding:

   - Rework device matching so device ID lifetime only needs to cover
     the probe path since dynamic IDs can be removed at any time (Gary
     Guo)

  Error handling:

   - Update mappings of AER errors to agent & layer and log them for
     each individual error when multiple errors detected (Lukas Wunner)

   - Log Error Source only once, not twice in separate messages (Lukas
     Wunner)

   - Emit TLP Log only for unmasked errors (Lukas Wunner)

   - Support Advisory Non-Fatal Errors (Lukas Wunner)

   - Allow DPC on all Downstream Ports, not just Root Ports, when OS
     controls AER (Darshit Shah)

  ASPM:

   - Program the same ASPM Control values for every function of
     multi-function devices, as recommended by the PCIe spec (Krishna
     Chaitanya Chundru)

   - Avoid L0s for Realtek RTS525A, where it causes an AER interrupt
     storm (Max Lee)

   - Avoid ASPM L0s, L1, and L1 PM Substates based on 'aspm-no-l0s',
     'aspm-no-l1' [1], and 'aspm-no-l1ss' DT properties (Krishna
     Chaitanya Chundru)

  Power management:

   - Allow D3 for native hotplug-capable Root Ports on non-x86 platforms
     (we avoid D3 for these ports on x86 because some old platforms
     didn't validate it) (Manivannan Sadhasivam)

   - Allow portdrv to claim Ports even if they don't support services
     (AER, PME, DPC, hotplug, etc) so it can do power management (Brian
     Norris)

  Power control:

   - Add support for PCIe WAKE# interrupt when described via DT (Krishna
     Chaitanya Chundru)

   - For the TC9563 PCIe switch:

       - Take a reference on the I2C adapter to avoid uninterruptible
         hang when unloading an I2C module while in-use (Johan Hovold)

       - Update DT binding and driver to restrict Tx Amplitude, DFE and
         N_FTS to USP, DSP1 and DSP2 (Manivannan Sadhasivam)

       - Power off only external-facing ports (DSP1, DSP2), leaving USP
         and DSP3 (aka VDSP) powered up (Manivannan Sadhasivam)

       - Move integrated MAC Endpoint out of the list of internal ports
         and configure it separately (Manivannan Sadhasivam)

  Virtualization:

   - Add ACS quirk for Pericom PI7C9X2G608 switches (Tim Harvey)

   - Fix a long-standing bug in the Intel PCH Root Port MPC ACS quirk
     that didn't update the intended INTEL_MPC_REG_IRBNCE bit because it
     used a 16-bit config write when a 32-bit write was intended
     (Mohamad Raizudeen)

  Procfs:

   - Avoid spurious runtime PM wakeup on config space accesses that are
     outside config space and fail before reaching PCI (Krzysztof
     Wilczyński)

   - Warn on user-space writes to kernel-exclusive config space regions,
     as we already do for sysfs (Krzysztof Wilczyński)

   - Check credentials of opener, not reader, for config space reads, as
     we already do for sysfs (Krzysztof Wilczyński)

  Sysfs:

   - In pci_write_legacy_io(), avoid out-of-bounds reads from the user
     buffer and fix incorrect ioport write data (1-byte writes on
     little-endian powerpc, 2- and 4-byte writes on big-endian powerpc)
     (Krzysztof Wilczyński)

   - In pci_read_legacy_io(), fix incorrect ioport read data for 2- and
     4-byte reads on big-endian powerpc (Krzysztof Wilczyński)

   - Fix I/O port accessor argument order in Alpha pci_legacy_write()
     (Krzysztof Wilczyński)

   - Avoid spurious runtime PM wakeup on config space accesses that are
     outside config space and fail before reaching PCI (Krzysztof
     Wilczyński)

   - Return -EINVAL, not -ENODEV, for mmap of I/O BAR that fails because
     the arch doesn't support it, as we do for procfs (Krzysztof
     Wilczyński)

   - Check for LOCKDOWN_PCI_ACCESS for legacy_io and legacy_mem, as we
     do for other config space accessors (Krzysztof Wilczyński)

  Peer-to-peer DMA:

   - Add Nvidia Vera Rubin to list of platforms that support P2PDMA
     (Leon Romanovsky)

  Endpoint framework:

   - Check doorbell SUCCESS bit in pci_endpoint_test to avoid treating
     some failures as successes (Niklas Cassel)

   - Fail doorbell test when the trigger IRQ is missed (Niklas Cassel)

  New native PCIe controller drivers:

   - Add DT binding and driver for NVIDIA Tegra264 (Thierry Reding)

  Native PCIe controllers:

   - Use common wait time definitions for PCIe link monitoring instead
     of defining driver-private duplicates (Thierry Reding)

  Generic host bridge driver:

   - Fix NULL pointer dereference that caused enumeration failures on
     32-bit CAM systems (Steffen Persvold)

  Amlogic Meson PCIe controller driver:

   - Correct the PERST# GPIO state so it remains asserted until power
     and REFCLK become stable to fix enumeration failure (Ronald
     Claveau)

  ASPEED PCIe controller driver:

   - Switch to irq_domain_create_linear() so we can obsolete
     irq_domain_add_linear() (Jiri Slaby)

  Cadence PCIe controller driver:

   - Add MODULE_DEVICE_TABLE to generate module aliases for OF-based
     module autoloading (Pengpeng Hou)

   - Add debugfs 'ltssm_status' file for LGA- and HPA-based Cadence
     controllers (Hans Zhang)

   - Support up to x4 (not x2) lanes for J200 (Takuma Fujiwara)

   - Fix host/endpoint dependencies for cadence-plat driver to fix link
     error when cadence-plat is built-in but the host or endpoint driver
     is modular (Aksh Garg)

  Freescale i.MX6 PCIe controller driver:

   - Add imx6 intr/aer/pme interrupt lines for i.MX95 (Richard Zhu)

   - Remove PERST# checking from pci_host_common_parse_port() so callers
     can decide whether to fall back to legacy DT binding with PERST# in
     the host bridge (Sherry Sun)

   - Fix build issues when PCI_PWRCTRL_GENERIC or PCI_HOST_COMMON is a
     module (Arnd Bergmann)

   - Create pwrctrl devices only once by doing it from imx_pcie_probe()
     instead of imx_pcie_host_init(), which is used during both probe
     and resume (Sherry Sun)

   - Use 'dw_pcie_rp->skip_pwrctrl_off' to avoid powering off devices
     during suspend to preserve wakeup capability (Sherry Sun)

   - Add runtime PM support for i.MX95 to allow dynamic power management
     when the link is idle (Richard Zhu)

  Intel VMD host bridge driver:

   - Support device ID 0x28C1 and assume that BIOS has already
     enumerated the hierarchy below VMD and stored bus range info for OS
     to use (Nirmal Patel)

   - Add support for VMCONFIG BUS_RESTRICT_CFG=3, which makes it
     possible to enumerate downstream devices on Intel Arrow Lake-HX
     systems and probably others (Ali Alaei)

   - Pay attention to _OSC negotiation for VMD hierarchy only when
     running on bare metal, not when running in a VM (Nirmal Patel)

   - Add Nova Lake (NVL) and Dunlow (DNL) Device IDs (Szymon Durawa)

  MediaTek PCIe controller driver:

   - Add support for PCIe controller in EcoNet EN7528 and EN751221 SoCs
     (Caleb James DeLisle)

  MediaTek PCIe Gen3 controller driver:

   - Add mediatek-gen3 'memory-region' for restricted DMA buffer
     (Chen-Yu Tsai)

  NVIDIA Tegra264 PCIe controller driver:

   - Distinguish Tegra264 C0 PCIe controller for internal GPU from C1-C5
     controllers so the unit address matches the first 'reg' entry
     (Thierry Reding)

   - Add Tegra264 Root Port stanzas to prepare for generic WAKE#
     handling (Thierry Reding)

  Qualcomm PCIe controller driver:

   - Add IPQ9650 compatible with global interrupt (Kathiravan
     Thirumoorthy)

   - Add IPQ5210 compatible with IPQ9574 fallback (Varadarajan
     Narayanan)

   - Add DT binding and driver support for Hawi SoC (Matthew Leung)

   - Skip PERST# GPIOs provided by downstream PCIe devices, which should
     be handled by drivers of those devices (Manivannan Sadhasivam)

   - Stop advertising Attention Button Present (no Qcom SoCs support
     Attention Buttons) so pciehp can use Presence Detect Changed events
     (Qiang Yu)

  Renesas R-Car PCIe controller driver:

   - Add rcar-gen4-pci-host optional 'msi-parent' for GIT ITS (Marek
     Vasut)

   - When MSI is enabled but iMSI-RX is not used, configure AXIINTC to
     allow GIT ITS to handle MSI (Marek Vasut)

   - Refactor GIC600 implementation to make it easier to add platforms
     that only support 32-bit addressing (Marek Vasut)

   - Add Renesas R-Car Gen4 S4/V4H/V4M to the list of GIC600
     integrations that only support 32-bit addressing (Marek Vasut)

  Renesas RZ/G3S PCIe controller driver:

   - Add DT binding and driver support for RZ/V2H(P) SoC, which contains
     two PCIe controllers, configured either as a single x4 link or two
     independent x2 link controllers (Lad Prabhakar)

  SpacemiT K1 PCIe controller driver:

   - Add missing MODULE_DEVICE_TABLE() to generate module alias info for
     OF-based module autoloading (Pengpeng Hou)

  StarFive PCIe controller driver:

   - Fix resource leaks on error paths in host_init() (Ali Tariq)

   - Fix runtime PM handling and teardown ordering to avoid register
     access while power or clocks are disabled (Ali Tariq)

   - Check for runtime PM resume failure to avoid register access while
     power or clocks are disabled (Ali Tariq)

  Synopsys DesignWare PCIe controller driver:

   - Add LECARC PMU IDs to the DWC RAS/DES VSEC list so it can take
     advantage of the existing debugfs support for silicon debug, error
     injection, and event counters (Brett Zhou)

   - Factor pcie_valid_speed() and pci_bus_speed2lnkctl2() out of bwctrl
     so they can be shared by the DWC core (Hans Zhang)

   - Flush MSI writes from endpoint before unmapping the iATU, as we
     already do for MSI-X writes (Niklas Cassel)

   - Unmap MSI iATU window before mapping MSI-X window, to avoid a
     subsequent MSI write using a disabled aperture and losing the
     interrupt (Niklas Cassel)

   - Change endpoint .pre_init() and .init() callbacks to return errors
     and handle them (Marek Vasut)

  UltraRISC PCIe controller driver:

   - Add 'core', 'dbi', and 'aux' clocks to DT binding and manage them
     in the driver (Jia Wang)

   - Use module_platform_driver() since this may be built as a module,
     though not removable because IRQs can't be safely disposed (Jia
     Wang)

  MicroSemi Switchtec management driver:

   - Add Microchip PCI1008 device ID and include it in NTB DMA alias
     quirk (Logan Gunthorpe)

  Miscellaneous:

   - Document how to write PCI Host Controller drivers (Manivannan
     Sadhasivam)

   - Fix typos in documentation (D'Orus Tsitera)

   - Use %pe format specifier to print error pointers so we get symbolic
     errname when available (Krzysztof Wilczyński)"

* tag 'pci-v7.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (124 commits)
  PCI: vmd: Add Nova Lake (NVL) and Dunlow (DNL) Device IDs
  PCI: tegra264: Add Tegra264 support
  dt-bindings: PCI: tegra264: Switch to PCIe Root Port bindings
  dt-bindings: PCI: tegra264: Strictly distinguish C0 from C1-C5
  PCI/AER: Support Advisory Non-Fatal Errors
  PCI: Fix 32-bit config write in Intel PCH Root Port MPC ACS quirk
  PCI: dwc: Handle return value from endpoint .pre_init callback
  PCI: dwc: Handle return value from endpoint .init callback
  PCI: dwc: Add PCI ID for LECARC PCIe PMU
  PCI/ASPM: Mask ASPM states based on Devicetree properties
  PCI/ASPM: Disable/restore ASPM on every function for multi-function devices
  Documentation: PCI: Document how to write PCI Host Controller drivers
  PCI/ASPM: Use pcie_capability_clear_and_set_word() for ASPM disable/restore
  PCI: Add support for PCIe WAKE# interrupt
  PCI: Allow D3 for native hotplug-capable Root Ports on non-x86 platforms
  dt-bindings: PCI: Correct white-space style
  PCI/ASPM: Avoid L0s for Realtek RTS525A
  PCI: ultrarisc: Use module_platform_driver()
  PCI: ultrarisc: Get and enable DP1000 PCIe controller clocks
  dt-bindings: PCI: ultrarisc: Add required DP1000 PCIe clocks
  ...
2026-08-23 12:44:10 -07:00
Linus Torvalds
ed3b875bea mm.git review status for mm-hotfixes-stable..mm-stable
Everything:
 
 Total patches:       501
 Reviews/patch:       1.66
 Reviewed rate:       70%
 
 Excluding DAMON:
 
 Total patches:       356
 Reviews/patch:       2.26
 Reviewed rate:       90%
 
 Excluding DAMON and selftests:
 
 Total patches:       329
 Reviews/patch:       2.31
 Reviewed rate:       92%
 
 Excluding DAMON, selftests and maple_tree:
 
 Total patches:       328
 Reviews/patch:       2.31
 Reviewed rate:       92%
 
 Summary of patch series in this merge:
 
 - The 2 patch series "mm: drop "sub" prefix from various places" from
   Dev Jain implements some page->folio conversion and a naming cleanup.
 
 - The 2 patch series "mm/kasan: remove redundant initialization for
   kasan_flag_write_only" from Igor Putko provides some KASAN cleanup work.
 
 - The 2 patch series "mm/filemap: reduce unnecessary xarray lookups"
   from Chi Zhiling provides a small speedup in the pagecaache read code.
 
 - The 4 patch series "mm/percpu: Fix possible NOFS/NOIO reclaim
   recursion" from Kaitao Cheng improves a few things in the vmalloc code -
   mainly the avoidance of GFP_KERNEL allocations when the caller asked for
   GFP_NOFS or GFP_NOIO.
 
 - The 3 patch series "mm/kmemleak: avoid soft lockup when scanning task
   stacks" from Breno Leitao avoids a soft lockup watchdog trigger from the
   kmemleak scanning code in extreme situations.
 
 - The 6 patch series "mm/page_owner: misc cleanups" from Ye Liu is a
   collection of unrelated cleanups to the page_owner code.  For some
   reason lots of people have been working on the page_owner code this
   cycle.
 
 - The 4 patch series "mm: convert to walk_page_range_vma() to eliminate
   find_vma()" from Kefeng Wang simplifies and accelerates the page walking
   library function.
 
 - The 3 patch series "mm/migrate: preparatory cleanups for batch copy
   and offload" from Shivank Garg implements cleanups in the migration
   code.
 
 - The 4 patch series "mm/page_owner: add per-fd filter infrastructure
   for print_mode and NUMA filtering" from Zhen Ni provides per-fd
   filtering to page_owner in order to reduce the sometimes vast amount of
   output it can produce.
 
 - The 19 patch series "mm: Refactor bootmem gigantic hugepage
   allocation" from Muchun Song is a "set of fixes and preparatory cleanups
   around bootmem HugeTLB handling, sparse initialization ordering, and
   related vmemmap setup".
 
 - The 4 patch series "mm/zsmalloc: reduce lock contention in zs_free()"
   from Wenchao Hao reduces lock contention in zs_free(), which dominates
   the unmap path under memory pressure on Android (LMK kills) and on x86
   servers running zswap-heavy workloads.  Up to 1.83x improvement in
   microbenchmarking.
 
 - The 2 patch series "move alloc_tag.c file under mm/" from Suren
   Baghdasaryan does that.
 
 - The 6 patch series "samples/damon: handle damon_{start,stop}()
   failures" from SJ Park fixes improper handling of damon_start(),
   damon_stop(), and damon_call() failures across DAMON sample modules to
   prevent potential memory leaks, operation disruptions and use-after-free
   bugs.
 
 - The 11 patch series "mm/damon/sysfs: kobject_del() directories that
   users can create/remove" from SJ Park resolves an issue where delayed
   sysfs directory removal under CONFIG_DEBUG_KOBJECT_RELEASE causes
   creation failures due to duplicate directory names by adding missing
   kobject_del() calls before creating new directories.
 
 - The 3 patch series "mm: cleanup clear_not_present_full_ptes()" from
   David Hildenbrand cleans up the core pte handling code.
 
 - The 3 patch series "selftests/damon: misc fixes for test bugs" from
   Kunwu Chan fixes several bugs in the DAMON selftests.
 
 - The 2 patch series "selftests/damon: fix memcg_path staging handling"
   from Cheng Nie fixes a bug in _damon_sysfs.py for damos_filter
   memcg_path setup, and adds a test case for it in sysfs.py.
 
 - The 2 patch series "selftests/damon: test kdamond refresh_ms" from
   Ruslan Valiyev introduces selftest coverage for DAMON's refresh_ms sysfs
   feature by updating the test control module and verifying that scheme
   stats update automatically without manual intervention.
 
 - The 5 patch series "mm/damon: five misc fixups" from Akinobu Mita
   contains miscellaneous DAMON fixups.
 
 - The 2 patch series "mm/damon/core: detect internal variation above
   max_nr_regions/2" from Jiayuan Chen fixes DAMON's region splitting
   behavior when region counts exceed half the maximum budget by
   dynamically scaling down the split fraction as the limit approaches,
   preventing large regions from staying un-split, and adds corresponding
   KUnit test coverage.
 
 - The 6 patch series "mm: preparatory patches for PMD level swap
   entries" from Usama Arif refactors and cleans up PMD softleaf helpers,
   call sites, and architecture flags to lay the groundwork for a follow-up
   series that introduces PMD page table swap entries.
 
 - The 11 patch series "mm/damon: update, optimize, and clean up doc,
   tests, and code" from SJ Park updates DAMON design and ABI
   documentation, expands unit and selftest coverage, optimizes
   damon_commit_target_regions(), and cleans up recently added sysfs
   interface code for better readability.
 
 - The 2 patch series "mm/vmpressure: reduce CPU, memory and code
   overhead on cgroup v2" from Usama Arif optimizes vmpressure() by
   skipping unnecessary work on cgroup v2 for userspace event notifications
   and refactors v1-only eventfd handling into mm/memcontrol-v1.c to reduce
   memory overhead and code complexity.
 
 - The 10 patch series "selftests/mm: refactor pkey helpers and fix mmap
   error handling" from Hongfu Li refactors pkeys shared tracing and
   assertion helpers into a common file, unifies protection key selftests
   to use consistent diagnostic logging and assertions, and enforces
   standardized MAP_FAILED return checks for mmap() calls across the tests.
 
 - The 18 patch series "mm/damon: optimize out nr_accesses_bp" from SJ
   Park replaces the error-prone, continuously updated nr_accesses_bp field
   in damon_region with an on-demand moving sum function
   (damon_nr_accesses_mvsum()), reducing structure memory overhead and
   avoiding state corruption bugs.
 
 - The 6 patch series "Open HugeTLB allocation routine for more generic
   use" from Ackerley Tng decouples HugeTLB folio allocation from VMA
   dependencies by introducing hugetlb_alloc_folio(), enabling subsystems
   like guest_memfd to allocate HugeTLB folios without standard VMA
   reservations or pseudo-VMAs.
 
 - The 3 patch series "mm/damon: provide pseudo moving sum probe_hits"
   from SJ Park integrates DAMON's probe_hits attribute counter into the
   pseudo moving sum infrastructure, enabling real-time, online monitoring
   without waiting for full aggregation intervals.
 
 - The 18 patch series "mm: Some cleanups for page allocator APIs" from
   Brendan Jackman simplifies and refactors the page allocator entry points
   and flags by unifying allocation paths, adding internal alloc_flags
   arguments, and eliminating redundant __ prefixed alloc_pages variants.
 
 - The 5 patch series "Fix incorrect access of hugetlb pte entries" from
   Dev Jain enforces the consistent use of huge_ptep_get() instead of
   ptep_get() for HugeTLB entries and fixes an unaligned address issue in
   arm64's huge_ptep_get() implementation.
 
 - The 8 patch series "mm/damon: validate all parameters in the core"
   from SJ Park consolidates parameter validation into the DAMON core
   specifically within damon_start() and damon_commit_ctx() to centralize
   error checking, eliminate caller-side redundant checks and to improve
   maintenance efficiency.
 
 - The 3 patch series "tools/mm/page_owner_sort: fix filtering and
   cleanup issues" from Yichong Chen renames is_need() to filter_record()
   for clearer return semantics, fixes per-record allocation memory leaks
   and bounds output copies in search_pattern() to address an existing
   buffer issue.
 
 - The 4 patch series "memcg: bail out reclaim when memcg is dying" from
   Jiayuan Chen mitigates a system-wide stall which occurs when a cgroup is
   removed while one of its memory control files is doing synchronous
   reclaim.
 
 - The 5 patch series "mm/memory-failure: add panic option for
   unrecoverable pages" from Breno Leitao introduces an opt-in
   vm.panic_on_unrecoverable_memory_failure sysctl that immediately panics
   the kernel on unrecoverable memory errors in kernel-owned pages to
   preserve error context and prevent delayed, silent data corruption.
 
 - The 11 patch series "mm/damon: refactor damon_{start,stop,commit}()
   for simple error handling" from SJ Park refactors the DAMON core API
   functions to guarantee that all contexts are fully stopped when
   damon_start(), damon_stop(), or damon_commit() fail, eliminating the
   need for complex and error-prone caller-side cleanup code.
 
 - The 5 patch series "Keep tail page private zero at free and folio
   split" from Zi Yan adds checks to ensure tail_page->private is zero when
   freeing compound or high-order pages and when promoting tail pages
   during large folio splits.  By validating these fields at free and split
   time, it allows the removal of redundant private field clearing inside
   prep_compound_tail().
 
 - The 4 patch series "mm: drop redundant lru_add_drain in anon folio
   reuse paths" from Barry Song eliminates redundant lru_add_drain() calls
   in wp_can_reuse_anon_folio() and do_swap_page() to reduce LRU lock
   contention and system overhead.
 
   By validating folio refcounts against the LRU cache before draining
   and removing unnecessary drains in the swap path, it achieves up to a
   30.5% reduction in drain calls during heavy swap workloads.
 
 - The 3 patch series "mm: clean up folio LRU and swap declarations" from
   Jianyue Wu reorganizes folio LRU and swap code by relocating
   page-cluster state to mm/swap_state.c, renaming mm/swap.c to mm/folio.c,
   and moving MM-internal reclaim declarations into mm/internal.h.
 
 - The 15 patch series "userfaultfd: working set tracking for VM guest
   memory" from Kiryl Shutsemau adds userfaultfd support for tracking the
   working set of VM guest memory, so a VMM can identify hot pages and
   reclaim cold ones to tiered or remote storage.
 
 - The 10 patch series "mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE (Part
   2)" from David Hildenbrand removes the remaining pieces of
   CONFIG_HAVE_BOOTMEM_INFO_NODE, performing some smaller cleanups around
   freeing of reserved vmemmap pages on the way.
 
 - The 7 patch series "mm/damon: update probe hits for runtime parameter
   commits" from SJ Park ensures that DAMON's probe_hits attribute counter
   is properly updated when monitoring intervals are changed at runtime,
   matching the behavior of nr_accesses.  To achieve this, it refactors and
   renames existing helper functions for shared use, applies the updates to
   probe_hits, and handles edge cases in damon_probe_hits_mvsum() to
   maintain measurement accuracy.
 
 - The 3 patch series "KSM: performance optimizations for rmap_walk_ksm"
   from xu xin resolves a severe KSM reverse-mapping performance bottleneck
   where thousands of split VMAs sharing a single anon_vma cause extended
   lock contention.  By adding an interval-filtering check during the rmap
   walk, it reduces worst-case anon_vma lock hold times from over 500ms
   down to under 2ms, preventing application freezes and latency spikes
   under memory pressure.
 
 - The 3 patch series "mm: split a couple of headers from internal.h"
   from Mike Rapoport splits declarations related to mm_init, memblock,
   vmalloc and sparse into new headers.
 
 - The 2 patch series "KSM: use linear_page_index in collect_procs_ksm()"
   from xu xin applies the interval tree optimization from rmap_walk_ksm()
   to collect_procs_ksm() to avoid iterating over non-matching VMAs during
   KSM memory error handling.  It hoists loop-invariant address
   initialization and restricts the anon_vma_interval_tree_foreach walk to
   a targeted page offset range, reducing redundant checks and improving
   lookup efficiency.
 
 - The 3 patch series "selftests/mm: avoid false failures in hugetlb and
   KSM tests" from Sayali Patil fixes issues in the hugetlb and KSM MM
   selftest categories that can report failures when the prerequisites for
   the tests are not satisfied.
 
 - The 19 patch series "mm/damon: introduce data attributes only
   monitoring" from SJ Park introduces attribute-weighted region management
   in DAMON, allowing users to prioritize specific data attributes (such as
   page sizes or cgroups) over or instead of access monitoring.
 
   By assigning weights to attribute probes, DAMON can completely disable
   access tracking and adjust monitoring regions based on weighted
   probe-hit counters to optimize monitoring quality for attribute-focused
   workloads.
 
 - The 8 patch series "mm/hmm: Add mmap lock-drop support for
   userfaultfd-backed mappings" from Stanislav Kinsburskii extends
   hmm_range_fault() to support userfaultfd-backed regions by allowing the
   mmap lock to be dropped during fault handling via a new
   hmm_range_fault_locked() helper.
 
   By accepting a locked pointer and signaling retry status when lock
   release occurs, it enables page fault resolution in userfaultfd regions
   while preserving backward compatibility for existing callers.
 
 - The 33 patch series "mm: make VMA page offset handling more
   consistent" from Lorenzo Stoakes cleans up and standardizes how
   vma->vm_pgoff is accessed and manipulated across file-backed and
   anonymous mappings in the kernel.
 
   It introduces dedicated helper functions such as vma_start_pgoff(),
   vma_end_pgoff(), vma_set_pgoff() and linear_page_delta() while renaming
   rmap interval tree helpers to better reflect their functionality.
 
   These changes establish a cleaner foundation for future work that will
   unify virtual page offset indexing for all anonymous and CoW'd folios.
 
 - The 3 patch series "mm: handle device-private PMDs in walk callbacks"
   from Usama Arif addresses kernel panics and state corruption caused by
   MM walk callbacks reaching non-present device-private PMD swap entries
   created during HMM migrations.
 
   It ensures that functions which acquire pmd_trans_huge_lock() properly
   recognize device-private PMDs instead of assuming a present THP or a
   standard migration entry.
 
 - The 5 patch series "mm/rmap: Refactor try_to_unmap_one" from Dev Jain
   refactors try_to_unmap_one by modularizing Hugetlb, anonymous-lazyfree,
   and anonymous-swapbacked logic into dedicated functions, laying the
   structural groundwork for batched anonymous large folio unmapping.
 
 - The 4 patch series "Docs/ABI/damon: sysfs ABI document fixes and
   additions" from Song Hu fixes typos and fills in missing entries in the
   DAMON sysfs ABI document.
 
 - The 10 patch series "dax/kmem: atomic whole-device hotplug via sysfs"
   from Gregory Price introduces an atomic sysfs state attribute and
   supporting DAX/MM infrastructure to prevent userland races when
   offlining and removing entire memory regions.
 
   By adding an unplugged state alongside standard online modes, it
   enables whole-device atomic hotplug control while preserving backward
   compatibility.
 
 - The 13 patch series "mm: convert more vm_flags_t users to vma_flags_t"
   from Lorenzo Stoakes continues transitioning the kernel from the
   deprecated vm_flags_t type to vma_flags_t across core memory management
   infrastructure.
 
   It replaces legacy type usage in core functions such as do_mmap(),
   unmapped area allocation, mm->def_vma_flags, and VMA operations like
   mlock, mprotect, and mremap.
 
 - The 2 patch series "Two small patches to clean up mm/mm_slot.h" from
   xu xin refactors mm_slot.h by introducing mm_slot_remove() to unify
   duplicate slot deletion sequences in khugepaged and KSM.  It also adds
   code documentation explaining why mm_slot_lookup and mm_slot_insert must
   remain as preprocessor macros rather than static inline functions.
 
 - The 10 patch series "mm/damon/core: hide core-private struct fields"
   from SJ Park cleans up DAMON core structures by consistently marking
   internal-only fields with private: comment tags to prevent improper
   direct access from outer layers.
 
   It enforces encapsulation across core structures including
   damon_region, damon_target, and damon_ctx and updates DAMON_SYSFS to
   interact through approved access APIs instead of exposing raw struct
   members.
 
 - The 6 patch series "mm/damon: unurgent fixes for infinite loop, NULL
   de-ref and races" from SJ Park addresses potential infinite loops, NULL
   dereferences, and race conditions identified in DAMON.
 
   It fixes an infinite loop triggered by extreme user configurations, a
   NULL pointer dereference within unit tests and minor monitoring
   accuracy degradation caused by subtle runtime races.
 
 - The 2 patch series "mm/page_alloc: fixes for free_pages_nolock() on
   RT/UP" from Brendan Jackman fixes an NMI safety flaw in
   __free_frozen_pages() where freeing pages on non-SMP or PREEMPT_RT
   kernels can bypass can_spin_trylock() checks via non-PCP or isolated
   migration paths.
 
   It also resolves potential kernel crashes and privilege escalation
   risks triggered when BPF tracing runs in NMI context alongside memory
   hotplug or large allocation frees.
 
 - The 4 patch series "mm/page_alloc: couple of followups for recent
   cleanups" from Brendan Jackman cleans up and updates page allocator
   nomenclature, documentation, and debug assertions.
 
   It aligns internal FPI_ flags with the public "nolock" naming
   convention, removes outdated internal implementation details from
   high-level page allocator comments, and eliminates obsolete VM_BUG_ON()
   assertions in allocation paths.
 
 - The 3 patch series "mm/mseal: further cleanups" from Lorenzo Stoakes
   refactors and simplifies the mseal implementation by clarifying API
   boundaries and removing unnecessary code complexity.
 
   It replaces generic do_mseal() usage outside the syscall with a
   dedicated mseal_mmap_page_zero() helper for MMAP_PAGE_ZERO, eliminates
   mm_struct parameters to enforce that sealing applies only to
   current->mm, and streamlines overall logic and comments with no
   functional changes intended.
 
 - The 4 patch series "mm/vmscan: fix swappiness=max and clean up
   per-node proactive reclaim" from Ridong Chen resolves reclaim behavior
   bugs and cleans up function parameters across memory reclaim paths.
 
   It fixes swappiness=max in both standard reclaim and MGLRU so
   unswappable anonymous memory no longer falls back to evicting page
   cache, ensures reclaim_store() returns accurate error codes instead of
   collapsing all failures into -EAGAIN, and removes the obsolete gfp_mask
   parameter from __node_reclaim().
 
 - The 6 patch series "mm: mincore: misc cleanups" from Kefeng Wang
   cleans up and simplifies the mincore code.  Most importantly, it removes
   the historical special behavior that always reports VM_PFNMAP pages as
   non-resident.
 
 - The 2 patch series "mm/huge_memory: drop dead split helper variants"
   from Kiryl Shutsemau implements two trivial cleanups in the folio split
   API.
 
 - The 7 patch series "mm/damon: fix uninitialized DAMOS field and kunit
   exec expectation bugs" from SJ Park resolves minor operational and
   testing bugs in DAMON identified by Sashiko.  It initializes the
   damos->last_applied field to prevent occasional efficiency degradation
   and fixes invalid memory accesses in DAMON KUnit tests during test
   failure handling.
 
 - The 3 patch series "cleanup for stable_page_flags()" from Jinjiang Tu
   cleans up and refactors stable_page_flags() used by /proc/kpageflags
   without altering functionality.
 
   It uses BIT_ULL() to prevent shift-overflow warnings on 64-bit flag
   bits, converts folio-specific flag checks to standard folio_test_*()
   helpers, and removes redundant CONFIG_PAGE_IDLE_FLAG handling.
 
 - The 3 patch series "Batch unmap of uffd-wp file folios" from Dev Jain
   extends batched folio unmapping support to file folios within
   userfaultfd write-protect (uffd-wp) VMAs by adding batching capabilities
   to pte_install_uffd_wp_if_needed().
 
   This removes special-case restrictions on uffd-wp VMAs in
   try_to_unmap_one(), significantly simplifying the function's control
   flow and complexity.
 
 - The 3 patch series "mm/early_ioremap: clarify and clean up
   early_ioremap_reset()" from Sang-Heon Jeon clarifies and cleans up the
   architecture-specific usage of __late_set_fixmap() and
   __late_clear_fixmap() after early_ioremap_reset().
 
   It adds explicit documentation regarding when early_ioremap_reset()
   must be called and removes redundant macro definitions and reset calls
   in the RISC-V and ARM64 architectures.
 
 - The 4 patch series "mm: fix reclaim storms in defrag_mode" from
   Johannes Weiner addresses severe performance regressions, swap storms,
   and spurious OOMs caused by vm.defrag_mode=1 under high memory pressure
   in Meta production.
 
   It updates the page allocator slowpath so non-movable allocation
   requests actively trigger direct reclaim and direct compaction at
   pageblock_order scale, allowing them to claim whole pageblocks rather
   than spinning unproductively.
 
 - The 2 patch series "zram: lockmap tweaks" from Sebastian Siewior
   optimizes and fixes lockdep tracking for zram devices by consolidating
   per-entry lockmaps and isolating lock classes across multiple instances.
 
   It reduces memory overhead by replacing per-entry lockdep_map instances
   with a single map per struct zram, and assigns a dynamic lock_class_key
   to each instance to prevent false deadlock reports when different zram
   devices are backed by distinct filesystems.
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Merge tag 'mm-stable-2026-08-18-18-39' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:

 - "mm: drop "sub" prefix from various places" (Dev Jain)

   page->folio conversion and a naming cleanup

 - "mm/kasan: remove redundant initialization for kasan_flag_write_only"
   (Igor Putko)

   KASAN cleanup work

 - "mm/filemap: reduce unnecessary xarray lookups" (Chi Zhiling)

   Small speedup in the pagecaache read code

 - "mm/percpu: Fix possible NOFS/NOIO reclaim recursion" (Kaitao Cheng)

   Improve the vmalloc code - mainly the avoidance of GFP_KERNEL
   allocations when the caller asked for GFP_NOFS or GFP_NOIO

 - "mm/kmemleak: avoid soft lockup when scanning task stacks" (Breno
   Leitao)

   Avoid a soft lockup watchdog trigger from the kmemleak scanning code
   in extreme situations

 - "mm/page_owner: misc cleanups" (Ye Liu)

   Cleanups to the page_owner code. For some reason lots of people have
   been working on the page_owner code this cycle.

 - "mm: convert to walk_page_range_vma() to eliminate find_vma()"
   (Kefeng Wang)

   Simplify and accelerate the page walking library function

 - "mm/migrate: preparatory cleanups for batch copy and offload"
   (Shivank Garg)

   Cleanups in the migration code

 - "mm/page_owner: add per-fd filter infrastructure for print_mode and
   NUMA filtering" (Zhen Ni)

   Per-fd filtering to page_owner in order to reduce the sometimes vast
   amount of output it can produce

 - "mm: Refactor bootmem gigantic hugepage allocation" (Muchun Song)

   Fixes and preparatory cleanups around bootmem HugeTLB handling,
   sparse initialization ordering, and related vmemmap setup

 - "mm/zsmalloc: reduce lock contention in zs_free()" (Wenchao Hao)

   Reduce lock contention in zs_free(), which dominates the unmap path
   under memory pressure on Android (LMK kills) and on x86 servers
   running zswap-heavy workloads.

   Up to 1.83x improvement in microbenchmarking.

 - "move alloc_tag.c file under mm/" (Suren Baghdasaryan)

 - "samples/damon: handle damon_{start,stop}() failures" (SJ Park)

   Fix improper handling of damon_start(), damon_stop(), and
   damon_call() failures across DAMON sample modules to prevent
   potential memory leaks, operation disruptions and use-after-free
   bugs

 - "mm/damon/sysfs: kobject_del() directories that users can
   create/remove" (SJ Park)

   Fix delayed sysfs directory removal under DEBUG_KOBJECT_RELEASE
   causeing creation failures due to duplicate directory names by adding
   missing kobject_del() calls before creating new directories

 - "mm: cleanup clear_not_present_full_ptes()" (David Hildenbrand)

   Clean up the core pte handling code

 - "selftests/damon: misc fixes for test bugs" (Kunwu Chan)

   Fix several bugs in the DAMON selftests

 - "selftests/damon: fix memcg_path staging handling" (Cheng Nie)

   Fix a bug in _damon_sysfs.py for damos_filter memcg_path setup, and
   add a test case for it in sysfs.py.

 - "selftests/damon: test kdamond refresh_ms" (Ruslan Valiyev)

   Selftest coverage for DAMON's refresh_ms sysfs feature by updating
   the test control module and verifying that scheme stats update
   automatically without manual intervention

 - "mm/damon: five misc fixups" (Akinobu Mita)

   Miscellaneous DAMON fixups.

 - "mm/damon/core: detect internal variation above max_nr_regions/2"
   (Jiayuan Chen)

   Fix DAMON's region splitting behavior when region counts exceed half
   the maximum budget by dynamically scaling down the split fraction as
   the limit approaches, preventing large regions from staying un-split,
   and add corresponding KUnit test coverage

 - "mm: preparatory patches for PMD level swap entries" (Usama Arif)

   Refactor and clean up PMD softleaf helpers, call sites, and
   architecture flags to lay the groundwork for a follow-up series that
   introduces PMD page table swap entries

 - "mm/damon: update, optimize, and clean up doc, tests, and code" (SJ
   Park)

   Update DAMON design and ABI documentation, expands unit and selftest
   coverage, optimize damon_commit_target_regions(), and clean up
   recently added sysfs interface code for better readability

 - "mm/vmpressure: reduce CPU, memory and code overhead on cgroup v2"
   (Usama Arif)

   Optimize vmpressure() by skipping unnecessary work on cgroup v2 for
   userspace event notifications and refactor v1-only eventfd handling
   into mm/memcontrol-v1.c to reduce memory overhead and code complexity

 - "selftests/mm: refactor pkey helpers and fix mmap error handling"
   (Hongfu Li)

   Refactor pkeys shared tracing and assertion helpers into a common
   file, unify protection key selftests to use consistent diagnostic
   logging and assertions, and enforce standardized MAP_FAILED return
   checks for mmap() calls across the tests

 - "mm/damon: optimize out nr_accesses_bp" (SJ Park)

   Replace the error-prone, continuously updated nr_accesses_bp field in
   damon_region with an on-demand moving sum function, reducing
   structure memory overhead and avoiding state corruption bugs

 - "Open HugeTLB allocation routine for more generic use" (Ackerley Tng)

   Decouple HugeTLB folio allocation from VMA dependencies by
   introducing hugetlb_alloc_folio(), enabling subsystems like
   guest_memfd to allocate HugeTLB folios without standard VMA
   reservations or pseudo-VMAs

 - "mm/damon: provide pseudo moving sum probe_hits" (SJ Park)

   Integrate DAMON's probe_hits attribute counter into the pseudo moving
   sum infrastructure, enabling real-time, online monitoring without
   waiting for full aggregation intervals

 - "mm: Some cleanups for page allocator APIs" (Brendan Jackman)

   Simplify and refactor the page allocator entry points and flags by
   unifying allocation paths, adding internal alloc_flags arguments, and
   eliminating redundant __ prefixed alloc_pages variants.

 - "Fix incorrect access of hugetlb pte entries" (Dev Jain)

   Enforce the consistent use of huge_ptep_get() instead of ptep_get()
   for HugeTLB entries and fixes an unaligned address issue in arm64's
   huge_ptep_get() implementation

 - "mm/damon: validate all parameters in the core" (SJ Park)

   Consolidate parameter validation into the DAMON core specifically
   within damon_start() and damon_commit_ctx() to centralize error
   checking, eliminate caller-side redundant checks and to improve
   maintenance efficiency

 - "tools/mm/page_owner_sort: fix filtering and cleanup issues" (Yichong
   Chen)

   Rename is_need() to filter_record() for clearer return semantics, fix
   per-record allocation memory leaks and bound output copies in
   search_pattern() to address an existing buffer issue

 - "memcg: bail out reclaim when memcg is dying" (Jiayuan Chen)

   Mitigate a system-wide stall which occurs when a cgroup is removed
   while one of its memory control files is doing synchronous reclaim

 - "mm/memory-failure: add panic option for unrecoverable pages" (Breno
   Leitao)

   Introduce an opt-in vm.panic_on_unrecoverable_memory_failure sysctl
   that immediately panics the kernel on unrecoverable memory errors in
   kernel-owned pages to preserve error context and prevent delayed,
   silent data corruption

 - "mm/damon: refactor damon_{start,stop,commit}() for simple error
   handling" (SJ Park)

   Refactor the DAMON core API functions to guarantee that all contexts
   are fully stopped when damon_start(), damon_stop(), or damon_commit()
   fail, eliminating the need for complex and error-prone caller-side
   cleanup code

 - "Keep tail page private zero at free and folio split" (Zi Yan)

   Add checks to ensure tail_page->private is zero when freeing compound
   or high-order pages and when promoting tail pages during large folio
   splits. By validating these fields at free and split time, it allows
   the removal of redundant private field clearing inside
   prep_compound_tail()

 - "mm: drop redundant lru_add_drain in anon folio reuse paths" (Barry
   Song)

   Eliminate redundant lru_add_drain() calls in
   wp_can_reuse_anon_folio() and do_swap_page() to reduce LRU lock
   contention and system overhead

   By validating folio refcounts against the LRU cache before draining
   and removing unnecessary drains in the swap path, it achieves up to a
   30.5% reduction in drain calls during heavy swap workloads

 - "mm: clean up folio LRU and swap declarations" (Jianyue Wu)

   Reorganize folio LRU and swap code by relocating page-cluster state
   to mm/swap_state.c, renaming mm/swap.c to mm/folio.c, and moving
   MM-internal reclaim declarations into mm/internal.h.

 - "userfaultfd: working set tracking for VM guest memory" (Kiryl
   Shutsemau)

   Add userfaultfd support for tracking the working set of VM guest
   memory, so a VMM can identify hot pages and reclaim cold ones to
   tiered or remote storage

 - "mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE (Part 2)" (David
   Hildenbrand)

   Remove the remaining pieces of CONFIG_HAVE_BOOTMEM_INFO_NODE,
   performing some smaller cleanups around freeing of reserved vmemmap
   pages on the way.

 - "mm/damon: update probe hits for runtime parameter commits" (SJ Park)

   Ensure that DAMON's probe_hits attribute counter is properly updated
   when monitoring intervals are changed at runtime, matching the
   behavior of nr_accesses. To achieve this, it refactors and renames
   existing helper functions for shared use, applies the updates to
   probe_hits, and handles edge cases in damon_probe_hits_mvsum() to
   maintain measurement accuracy.

 - "KSM: performance optimizations for rmap_walk_ksm" (xu xin)

   Resolve a severe KSM reverse-mapping performance bottleneck where
   thousands of split VMAs sharing a single anon_vma cause extended lock
   contention.

   By adding an interval-filtering check during the rmap walk, it
   reduces worst-case anon_vma lock hold times from over 500ms down to
   under 2ms, preventing application freezes and latency spikes under
   memory pressure.

 - "mm: split a couple of headers from internal.h" (Mike Rapoport)

   Split declarations related to mm_init, memblock, vmalloc and sparse
   into new headers

 - "KSM: use linear_page_index in collect_procs_ksm()" (xu xin)

   Apply the interval tree optimization from rmap_walk_ksm() to
   collect_procs_ksm() to avoid iterating over non-matching VMAs during
   KSM memory error handling.

   It hoists loop-invariant address initialization and restricts the
   anon_vma_interval_tree_foreach walk to a targeted page offset range,
   reducing redundant checks and improving lookup efficiency.

 - "selftests/mm: avoid false failures in hugetlb and KSM tests" (Sayali
   Patil)

   Fix issues in the hugetlb and KSM MM selftest categories that can
   report failures when the prerequisites for the tests are not
   satisfied

 - "mm/damon: introduce data attributes only monitoring" (SJ Park)

   Introduce attribute-weighted region management in DAMON, allowing
   users to prioritize specific data attributes (such as page sizes or
   cgroups) over or instead of access monitoring.

   By assigning weights to attribute probes, DAMON can completely
   disable access tracking and adjust monitoring regions based on
   weighted probe-hit counters to optimize monitoring quality for
   attribute-focused workloads.

 - "mm/hmm: Add mmap lock-drop support for userfaultfd-backed mappings"
   (Stanislav Kinsburskii)

   Extend hmm_range_fault() to support userfaultfd-backed regions by
   allowing the mmap lock to be dropped during fault handling via a new
   hmm_range_fault_locked() helper.

   By accepting a locked pointer and signaling retry status when lock
   release occurs, it enables page fault resolution in userfaultfd
   regions while preserving backward compatibility for existing callers.

 - "mm: make VMA page offset handling more consistent" (Lorenzo Stoakes)

   Clean up and standardize how vma->vm_pgoff is accessed and
   manipulated across file-backed and anonymous mappings in the kernel

   It introduces dedicated helper functions such as vma_start_pgoff(),
   vma_end_pgoff(), vma_set_pgoff() and linear_page_delta() while
   renaming rmap interval tree helpers to better reflect their
   functionality.

   These changes establish a cleaner foundation for future work that
   will unify virtual page offset indexing for all anonymous and CoW'd
   folios.

 - "mm: handle device-private PMDs in walk callbacks" (Usama Arif)

   Address kernel panics and state corruption caused by MM walk
   callbacks reaching non-present device-private PMD swap entries
   created during HMM migrations

   It ensures that functions which acquire pmd_trans_huge_lock()
   properly recognize device-private PMDs instead of assuming a present
   THP or a standard migration entry.

 - "mm/rmap: Refactor try_to_unmap_one" (Dev Jain)

   Refactor try_to_unmap_one by modularizing Hugetlb,
   anonymous-lazyfree, and anonymous-swapbacked logic into dedicated
   functions, laying the structural groundwork for batched anonymous
   large folio unmapping.

 - "Docs/ABI/damon: sysfs ABI document fixes and additions" (Song Hu)

   Fix typos and fills in missing entries in the DAMON sysfs ABI
   document

 - "dax/kmem: atomic whole-device hotplug via sysfs" (Gregory Price)

   Introduce an atomic sysfs state attribute and supporting DAX/MM
   infrastructure to prevent userland races when offlining and removing
   entire memory regions

   By adding an unplugged state alongside standard online modes, it
   enables whole-device atomic hotplug control while preserving backward
   compatibility.

 - "mm: convert more vm_flags_t users to vma_flags_t" (Lorenzo Stoakes)

   Continue transitioning the kernel from the deprecated vm_flags_t type
   to vma_flags_t across core memory management infrastructure.

   It replaces legacy type usage in core functions such as do_mmap(),
   unmapped area allocation, mm->def_vma_flags, and VMA operations like
   mlock, mprotect, and mremap.

 - "Two small patches to clean up mm/mm_slot.h" (xu xin)

   Refactor mm_slot.h by introducing mm_slot_remove() to unify duplicate
   slot deletion sequences in khugepaged and KSM. It also adds code
   documentation explaining why mm_slot_lookup and mm_slot_insert must
   remain as preprocessor macros rather than static inline functions.

 - "mm/damon/core: hide core-private struct fields" (SJ Park)

   Clean up DAMON core structures by consistently marking internal-only
   fields with private: comment tags to prevent improper direct access
   from outer layers.

   It enforces encapsulation across core structures including
   damon_region, damon_target, and damon_ctx and updates DAMON_SYSFS to
   interact through approved access APIs instead of exposing raw struct
   members.

 - "mm/damon: unurgent fixes for infinite loop, NULL de-ref and races"
   (SJ Park)

   Address potential infinite loops, NULL dereferences, and race
   conditions identified in DAMON

   It fixes an infinite loop triggered by extreme user configurations, a
   NULL pointer dereference within unit tests and minor monitoring
   accuracy degradation caused by subtle runtime races.

 - "mm/page_alloc: fixes for free_pages_nolock() on RT/UP" (Brendan
   Jackman)

   Fix an NMI safety flaw in __free_frozen_pages() where freeing pages
   on non-SMP or PREEMPT_RT kernels can bypass can_spin_trylock() checks
   via non-PCP or isolated migration paths.

   It also resolves potential kernel crashes and privilege escalation
   risks triggered when BPF tracing runs in NMI context alongside memory
   hotplug or large allocation frees.

 - "mm/page_alloc: couple of followups for recent cleanups" (Brendan
   Jackman)

   Clean up and update page allocator nomenclature, documentation, and
   debug assertions.

   It aligns internal FPI_ flags with the public "nolock" naming
   convention, removes outdated internal implementation details from
   high-level page allocator comments, and eliminates obsolete
   VM_BUG_ON() assertions in allocation paths.

 - "mm/mseal: further cleanups" (Lorenzo Stoakes)

   Refactor and simplify the mseal implementation by clarifying API
   boundaries and removing unnecessary code complexity.

   It replaces generic do_mseal() usage outside the syscall with a
   dedicated mseal_mmap_page_zero() helper for MMAP_PAGE_ZERO,
   eliminates mm_struct parameters to enforce that sealing applies only
   to current->mm, and streamlines overall logic and comments with no
   functional changes intended.

 - "mm/vmscan: fix swappiness=max and clean up per-node proactive
   reclaim" (Ridong Chen)

   Resolve reclaim behavior bugs and clean up function parameters across
   memory reclaim paths

   It fixes swappiness=max in both standard reclaim and MGLRU so
   unswappable anonymous memory no longer falls back to evicting page
   cache, ensures reclaim_store() returns accurate error codes instead
   of collapsing all failures into -EAGAIN, and removes the obsolete
   gfp_mask parameter from __node_reclaim().

 - "mm: mincore: misc cleanups" (Kefeng Wang)

   Clean up and simplifies the mincore code. Most importantly, it
   removes the historical special behavior that always reports VM_PFNMAP
   pages as non-resident.

 - "mm/huge_memory: drop dead split helper variants" (Kiryl Shutsemau)

   Two trivial cleanups in the folio split API

 - "mm/damon: fix uninitialized DAMOS field and kunit exec expectation
   bugs" (SJ Park)

   Resolve minor operational and testing bugs in DAMON identified by
   Sashiko. It initializes the damos->last_applied field to prevent
   occasional efficiency degradation and fixes invalid memory accesses
   in DAMON KUnit tests during test failure handling.

 - "cleanup for stable_page_flags()" (Jinjiang Tu)

   Clean up and refactor stable_page_flags() used by /proc/kpageflags
   without altering functionality.

   It uses BIT_ULL() to prevent shift-overflow warnings on 64-bit flag
   bits, converts folio-specific flag checks to standard folio_test_*()
   helpers, and removes redundant CONFIG_PAGE_IDLE_FLAG handling.

 - "Batch unmap of uffd-wp file folios" (Dev Jain)

   Extend batched folio unmapping support to file folios within
   userfaultfd write-protect (uffd-wp) VMAs by adding batching
   capabilities to pte_install_uffd_wp_if_needed().

   This removes special-case restrictions on uffd-wp VMAs in
   try_to_unmap_one(), significantly simplifying the function's control
   flow and complexity.

 - "mm/early_ioremap: clarify and clean up early_ioremap_reset()"
   (Sang-Heon Jeon)

   Clarify and clean up the architecture-specific usage of
   __late_set_fixmap() and __late_clear_fixmap() after
   early_ioremap_reset()

   It adds explicit documentation regarding when early_ioremap_reset()
   must be called and removes redundant macro definitions and reset
   calls in the RISC-V and ARM64 architectures.

 - "mm: fix reclaim storms in defrag_mode" (Johannes Weiner)

   Address severe performance regressions, swap storms, and spurious
   OOMs caused by vm.defrag_mode=1 under high memory pressure in Meta
   production

   It updates the page allocator slowpath so non-movable allocation
   requests actively trigger direct reclaim and direct compaction at
   pageblock_order scale, allowing them to claim whole pageblocks rather
   than spinning unproductively.

 - "zram: lockmap tweaks" (Sebastian Siewior)

   Optimize and fix lockdep tracking for zram devices by consolidating
   per-entry lockmaps and isolate lock classes across multiple instances

   This reduces memory overhead by replacing per-entry lockdep_map
   instances with a single map per struct zram, and assigns a dynamic
   lock_class_key to each instance to prevent false deadlock reports
   when different zram devices are backed by distinct filesystems.

* tag 'mm-stable-2026-08-18-18-39' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (501 commits)
  selftests/mm: thuge-gen: fix test_shmget() for PAGE_SIZE check
  selftests/mm: unpoison pages in memory-failure teardown
  mm/shmem: downgrade final i_blocks check in shmem_evict_inode() to pr_warn()
  mm/khugepaged: replace mutex_lock/mutex_unlock usage with guard macro
  mm/zsmalloc: fix release order of locks in zs_page_migrate()
  Documentation: zram: remove sections numbering
  ksm: stop iterating VMAs when ksm_test_exit returns true
  mm: fold userfaultfd_rwp() to false without CONFIG_ARCH_HAS_PTE_PROTNONE
  mm/migrate: report RCU-tasks quiescent states in migrate_pages_batch()
  zram: use a custom key for each zram object
  zram: move lockmap to be per-zram instead per table
  selftests/mm: fix gup_longterm EINVAL error message
  mm: page_alloc: fix non-movable reclaim storm in defrag_mode
  mm: page_alloc: move capture_control to the page allocator
  mm: compaction: support non-movable compaction for pageblock requests
  mm: page_alloc: __GFP_FS lockdep annotation for direct compaction
  hugetlb: evaluate subpool free state while locked
  mm/damon: remove trailing semicolons after function definitions
  mm/damon/ops-common: prevent migration fallback to non-target nodes
  mm/damon: update outdated comment about DAMOS filter handling
  ...
2026-08-20 18:17:08 -07:00
Linus Torvalds
5a8cd539ac Major changes:
- Redesign the verifier error reporting: failures now carry source and
   instruction annotations along with the causal event history that led
   to them, making program rejections far easier to debug and repair
   (Kumar Kartikeya Dwivedi)
 
 - Add arena argument support to kfuncs and struct_ops through the new
   __arena and __arena__nullable suffixes (Tejun Heo, Puranjay Mohan,
   Kumar Kartikeya Dwivedi, Ihor Solodrai)
 
 - Signed BPF program loader rework to accommodate both BPF and security
   community needs where the kernel runs the signature verification at
   BPF_PROG_LOAD time before the LSM admission hook (Daniel Borkmann)
 
 - Add a set of ksock kfuncs which let BPF LSM and syscall programs
   create, connect and send on UDP sockets in order to emit telemetry
   data (Mahe Tardy)
 
 - Unify helper and kfunc call argument verification and classify kfunc
   arguments purely from BTF into a generated bpf_func_proto which is
   computed once at add-call time (Amery Hung)
 
 Other features and fixes:
 
 - Enable EXECMEM_ROX_CACHE for BPF allocations on x86 (Mike Rapoport)
 
 - Add bidirectional VLAN support to bpf_fib_lookup() through the new
   BPF_FIB_LOOKUP_VLAN and BPF_FIB_LOOKUP_VLAN_INPUT flags
   (Avinash Duduskar)
 
 - Infer zext_dst from static register liveness analysis to fix 32-bit
   zero-extension semantics, and remove the artificial limitations on
   pointer types eligible for spilling (Eduard Zingerman)
 
 - Inline the numeric open-coded iterator kfuncs so that bpf_for() loops
   no longer pay a kfunc call on every iteration (Puranjay Mohan)
 
 - Add an arena-based bitmap data structure to libarena along with
   serial and parallel selftests (Emil Tsalapatis)
 
 - Teach resolve_btfids to discover kfuncs from the kernel's BTF ID sets
   and to emit kfunc BTF decl tags, reducing the kernel build's
   dependency on pahole features (Ihor Solodrai)
 
 - Add BPF_F_ADJ_ROOM_DECAP_* flags to bpf_skb_adjust_room() so that
   tunnel decapsulation can update the GSO and encapsulation state of
   the skb (Nick Hudson)
 
 - Fix the ring buffer pending_pos walk and the available-data
   accounting on 32-bit position wrap (Israel Téllez García)
 
 - Add memory usage accounting for arena maps and fix an mmap_lock
   deadlock on arena lock failure (Jiayuan Chen)
 
 - Add tracing_multi link info support to the kernel UAPI and bpftool,
   and refactor the stack map code to run with preemption disabled
   (Jiri Olsa)
 
 - Support BPF_F_EGRESS in bpf_redirect_peer() to emit the skb in the
   egress direction of the target's peer device (Jordan Rife)
 
 - Add a KF_SPINLOCK_SAFE kfunc flag so that providers, in particular
   modules, can declare kfuncs safe to call under bpf_spin_lock instead
   of relying on the verifier's hard-coded allowlist (Kaitao Cheng)
 
 - Introduce global percpu data for BPF programs with libbpf probing
   and bpftool skeleton support, and stop exposing uninitialized kernel
   heap memory when copying per-CPU map values (Leon Hwang)
 
 - Add s390 JIT support for load-acquire and store-release instructions
   (Maxim Khmelevskii)
 
 - Fix a CFI mismatch in the task work callback and an arm64 KASAN
   false positive after bpf_throw() (Mykyta Yatsenko)
 
 - Reject writes through untrusted BTF pointers and bound the
   rdonly/rdwr_buf_size kfunc arguments (Nicholas Dudar)
 
 - Invalidate RCU pointers only after the final spin unlock and account
   for preempt and IRQ disabled regions as overlapping RCU protection
   (Ning Ding)
 
 - Support mixing bpf2bpf calls and tail calls on RV64, add signed
   operations and 32-bit atomics to the RV32 JIT, and add timed may_goto
   support (Pu Lehui, Kuan-Wei Chiu, Feng Jiang)
 
 - Fix a use-after-free on mm_struct in bpf_find_vma() for foreign tasks
   and an mmap_lock leak in the irq_work path (Sanghyun Park)
 
 - Populate mmap-able BPF array map memory lazily which makes mmap() O(1)
   instead of proportional to the map size (Song Liu)
 
 - Introduce a jit_required flag and reject programs with inlined
   helpers when no JIT is available, where the interpreter would
   otherwise jump into an invalid address (Tiezhu Yang)
 
 - Fix the x86 JIT per-CPU address resolution into an extended register
   where the REX prefix dropped the high destination register bit
   (Vineet Gupta)
 
 - Reject MEM_ALLOC BTF accesses past object bounds, arena frees below
   the arena base, and mixed arena and ordinary atomic paths
   (Yiyang Chen)
 
 - Fix the trampoline handling of 128-bit arguments and of return values
   larger than 8 bytes (Yonghong Song)
 
 - Ensure that any fault prone load is rewritten with exception table
   handling, and fix the arena load-acquire and atomic fetch handling
   in the x86, arm64, riscv and s390 JITs (Daniel Borkmann)
 
 - Many more fixes and cleanups across the verifier, arena, trampolines,
   sockmap, cgroup, ring buffer, x86/arm64/riscv/s390 JITs, libbpf,
   bpftool, resolve_btfids and selftests.
 
 Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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Merge tag 'bpf-next-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Pull bpf updates from Daniel Borkmann:
 "Major changes:

   - Redesign the verifier error reporting: failures now carry source
     and instruction annotations along with the causal event history
     that led to them, making program rejections far easier to debug and
     repair (Kumar Kartikeya Dwivedi)

   - Add arena argument support to kfuncs and struct_ops through the new
     __arena and __arena__nullable suffixes (Tejun Heo, Puranjay Mohan,
     Kumar Kartikeya Dwivedi, Ihor Solodrai)

   - Signed BPF program loader rework to accommodate both BPF and
     security community needs where the kernel runs the signature
     verification at BPF_PROG_LOAD time before the LSM admission hook
     (Daniel Borkmann)

   - Add a set of ksock kfuncs which let BPF LSM and syscall programs
     create, connect and send on UDP sockets in order to emit telemetry
     data (Mahe Tardy)

   - Unify helper and kfunc call argument verification and classify
     kfunc arguments purely from BTF into a generated bpf_func_proto
     which is computed once at add-call time (Amery Hung)

  Other features and fixes:

   - Enable EXECMEM_ROX_CACHE for BPF allocations on x86 (Mike Rapoport)

   - Add bidirectional VLAN support to bpf_fib_lookup() through the new
     BPF_FIB_LOOKUP_VLAN and BPF_FIB_LOOKUP_VLAN_INPUT flags (Avinash
     Duduskar)

   - Infer zext_dst from static register liveness analysis to fix 32-bit
     zero-extension semantics, and remove the artificial limitations on
     pointer types eligible for spilling (Eduard Zingerman)

   - Inline the numeric open-coded iterator kfuncs so that bpf_for()
     loops no longer pay a kfunc call on every iteration (Puranjay
     Mohan)

   - Add an arena-based bitmap data structure to libarena along with
     serial and parallel selftests (Emil Tsalapatis)

   - Teach resolve_btfids to discover kfuncs from the kernel's BTF ID
     sets and to emit kfunc BTF decl tags, reducing the kernel build's
     dependency on pahole features (Ihor Solodrai)

   - Add BPF_F_ADJ_ROOM_DECAP_* flags to bpf_skb_adjust_room() so that
     tunnel decapsulation can update the GSO and encapsulation state of
     the skb (Nick Hudson)

   - Fix the ring buffer pending_pos walk and the available-data
     accounting on 32-bit position wrap (Israel Téllez García)

   - Add memory usage accounting for arena maps and fix an mmap_lock
     deadlock on arena lock failure (Jiayuan Chen)

   - Add tracing_multi link info support to the kernel UAPI and bpftool,
     and refactor the stack map code to run with preemption disabled
     (Jiri Olsa)

   - Support BPF_F_EGRESS in bpf_redirect_peer() to emit the skb in the
     egress direction of the target's peer device (Jordan Rife)

   - Add a KF_SPINLOCK_SAFE kfunc flag so that providers, in particular
     modules, can declare kfuncs safe to call under bpf_spin_lock
     instead of relying on the verifier's hard-coded allowlist (Kaitao
     Cheng)

   - Introduce global percpu data for BPF programs with libbpf probing
     and bpftool skeleton support, and stop exposing uninitialized
     kernel heap memory when copying per-CPU map values (Leon Hwang)

   - Add s390 JIT support for load-acquire and store-release
     instructions (Maxim Khmelevskii)

   - Fix a CFI mismatch in the task work callback and an arm64 KASAN
     false positive after bpf_throw() (Mykyta Yatsenko)

   - Reject writes through untrusted BTF pointers and bound the
     rdonly/rdwr_buf_size kfunc arguments (Nicholas Dudar)

   - Invalidate RCU pointers only after the final spin unlock and
     account for preempt and IRQ disabled regions as overlapping RCU
     protection (Ning Ding)

   - Support mixing bpf2bpf calls and tail calls on RV64, add signed
     operations and 32-bit atomics to the RV32 JIT, and add timed
     may_goto support (Pu Lehui, Kuan-Wei Chiu, Feng Jiang)

   - Fix a use-after-free on mm_struct in bpf_find_vma() for foreign
     tasks and an mmap_lock leak in the irq_work path (Sanghyun Park)

   - Populate mmap-able BPF array map memory lazily which makes mmap()
     O(1) instead of proportional to the map size (Song Liu)

   - Introduce a jit_required flag and reject programs with inlined
     helpers when no JIT is available, where the interpreter would
     otherwise jump into an invalid address (Tiezhu Yang)

   - Fix the x86 JIT per-CPU address resolution into an extended
     register where the REX prefix dropped the high destination register
     bit (Vineet Gupta)

   - Reject MEM_ALLOC BTF accesses past object bounds, arena frees below
     the arena base, and mixed arena and ordinary atomic paths (Yiyang
     Chen)

   - Fix the trampoline handling of 128-bit arguments and of return
     values larger than 8 bytes (Yonghong Song)

   - Ensure that any fault prone load is rewritten with exception table
     handling, and fix the arena load-acquire and atomic fetch handling
     in the x86, arm64, riscv and s390 JITs (Daniel Borkmann)

   - Many more fixes and cleanups across the verifier, arena,
     trampolines, sockmap, cgroup, ring buffer, x86/arm64/riscv/s390
     JITs, libbpf, bpftool, resolve_btfids and selftests"

* tag 'bpf-next-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (373 commits)
  selftests/bpf: Add tests for a store on a fault prone qdisc pointer
  selftests/bpf: Add tests for fault prone loads out of RCU pointers
  selftests/bpf: Add tests for pointer type merge at a shared load
  selftests/bpf: Remove duplicate copies of the arena spinlock qnodes
  selftests/bpf: Retry stat generation in cgroup_iter_memcg
  selftests/bpf: Test pseudo-function policy diagnostics
  bpf: Distinguish function references in policy diagnostics
  bpf: Preserve source attribution without source text
  selftests/bpf: Test kfunc argument diagnostics
  bpf: Correct kfunc argument diagnostics
  bpf: Use canonical stack argument names in diagnostics
  bpf: Preserve R0 lineage across helper calls
  selftests/bpf: Exercise negative optlen in cgroup getsockopt hook
  bpf: Reject negative optlen in cgroup getsockopt hook
  selftests/bpf: tc_tunnel - validate decap GSO and encapsulation state
  bpf: Clear decap state on skb_adjust_room shrink path
  bpf: Allow new DECAP flags and add guard rails
  bpf: Add BPF_F_ADJ_ROOM_DECAP_* flags for tunnel decapsulation
  bpf: Refactor masks for ADJ_ROOM flags and encap validation
  bpf: Name the enum for BPF_FUNC_skb_adjust_room flags
  ...
2026-08-20 07:36:20 -07:00
Linus Torvalds
a4ff2be345 This update includes the following changes:
API:
 
 - Add af_alg_restrict sysctl and white list.
 - Fix potential suspend/resume races in hwrng.
 
 Algorithms:
 
 - Optimize vli additive operations using compiler builtins in ecc.
 
 Drivers:
 
 - Remove unsafe/deprecated algorithms from qce.
 - Mark qce as BROKEN.
 - Add runtime PM and interconnect bandwidth scaling support to qce.
 - Remove crypto_rng from qcom, sun8i and caam.
 - Fix SG list issues in iaa.
 - Fix SEV init path bugs in ccp.
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Merge tag 'v7.3-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

Pull crypto update from Herbert Xu:
 "API:
   - Add af_alg_restrict sysctl and white list
   - Fix potential suspend/resume races in hwrng

  Algorithms:
   - Optimize vli additive operations using compiler builtins in ecc

  Drivers:
   - Remove unsafe/deprecated algorithms from qce
   - Mark qce as BROKEN
   - Add runtime PM and interconnect bandwidth scaling support to qce
   - Remove crypto_rng from qcom, sun8i and caam
   - Fix SG list issues in iaa
   - Fix SEV init path bugs in ccp"

* tag 'v7.3-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (122 commits)
  crypto: lskcipher - propagate errors from unaligned crypt
  crypto: keembay - use crypto_memneq() to compare CCM AEAD tags
  crypto: keembay - use crypto_memneq() to compare GCM AEAD tags
  crypto: sa2ul - use crypto_memneq() to compare AEAD tag
  hwrng: drivers - use named initializers for acpi_device_id
  crypto: qce - fix CCM AAD buffer underallocation
  crypto: iaa - unmap dst before software fallback on decompress
  crypto: iaa - use bounce buffer for multi-sg decompress input
  crypto: iaa - avoid counting fallback decompression bytes
  crypto: iaa - fall back to software for multi-entry scatterlists
  hwrng: core - Stop/start hwrng_fillfn() kthread before/after suspend-resume
  crypto: hisilicon/sec2 - fix CCM algorithm long packet failure
  crypto: eip93 - use struct_size() and flexible array for ring allocation
  crypto: krb5 - use kfree_sensitive() for derived key buffers
  crypto: af_alg - Stop after finding name in allowlist
  crypto: af_alg - Replace 'bool privileged' with flags
  crypto: af_alg - Make cbc(paes) privileged-only
  hwrng: imx-rngc - Disable clock on registration failure
  crypto: qat - remove dead ADF_HEX code
  crypto: qce - simplify qce_handle_request
  ...
2026-08-19 17:25:42 -07:00
Oliver Upton
aa8e5dc6a7 Merge branch 'kvm-arm64/misc-7.3' into next
* kvm-arm64/misc-7.3:
  : Miscellaneous fixes for KVM/arm64, 7.3
  :
  :  - Fixes for saving invalid table entries as part of saving the ITS
  :    tables (Fuad Tabba)
  :
  :  - Don't reallocate the SPI array for re-attempted vgic_init(), avoiding
  :    a memory leak (Fuad Tabba)
  :
  :  - Hold a reference on an LPI when saving the pending state (Qihang)
  :
  :  - Don't WARN for out-of-range, guest-supplied INTID (Karl)
  :
  :  - Avoid corrupting GPRs for 32-bit CP64 reads (Karl)
  :
  :  - Reset 'in kernel' VGIC state when private IRQ allocation fails (Fuad)
  :
  :  - Avoid kallsyms lookup in nVHE panic unless the host stage-2 is also
  :    disabled (Vincent)
  :
  :  - Disregard Pending+Active state when computing maintenance IRQ for
  :    ICH_MISR_EL2.NP (Kajetan)
  :
  :  - Various Sashiko-identified issues dealing with GICv5 (Sascha)
  :
  :  - Fix CPU onlining in pKVM due to mismatched accesses when the MMU is
  :    disabled (Will)
  KVM: arm64: Validate GICv5 timer PPIs before claiming ownership
  KVM: arm64: vgic: Reject out-of-range GICv5 PPI IDs
  KVM: arm64: vgic: Prevent speculative SPI array underflow
  KVM: arm64: vgic: Free gic_kvm_info on initialization failure
  KVM: arm64: Avoid mismatched accesses to 'struct kvm_nvhe_init_params'
  KVM: arm64: vgic: Fix detection of MI on no pending LR
  KVM: arm64: Drop %pB on nVHE panic when stage-2 is active
  KVM: arm64: vgic: Reset in_kernel on private IRQ allocation failure
  KVM: arm64: GICv2: Don't WARN on out-of-range GICV_DIR INTID
  KVM: arm64: Preserve GPRs for AArch32 CP64 reads generating an UNDEF
  KVM: arm64: vgic-v3: take an LPI reference in vgic_v3_save_pending_tables
  KVM: arm64: vgic-its: Point saved ITEs at the next valid entry
  KVM: arm64: vgic-its: Don't save collections the table cannot hold
  KVM: arm64: vgic: Don't leak the SPI array when init is retried
  KVM: arm64: vgic-its: Don't dereference a NULL collection on ITT save

Signed-off-by: Oliver Upton <oupton@kernel.org>
2026-08-19 14:08:24 -07:00
Oliver Upton
2791de5354 Merge branch 'kvm-arm64/vtr-patch' into next
* kvm-arm64/vtr-patch:
  : Inline patching of ICH_VTR_EL2 constant, courtesy of Marc Zyngier
  :
  : Unify readers of ICH_VTR_EL2 on an instruction-patched constant value,
  : avoiding system register accesses known to trap under nested
  : virtualization and sharing the implementation between pKVM and 'regular'
  : KVM.
  KVM: arm64: vgic-v3: Kill kvm_vgic_global_state.ich_vtr_el2
  KVM: arm64: vgic-v3: Simplify initial GICv3 configuration sampling
  KVM: arm64: Convert most ICH_VTR_EL2 accesses to inlined literal value
  KVM: arm64: Add a helper providing an inlined literal value for ICH_VTR_EL2
  KVM: arm64: Move GICv3 broken SEIS implementation detection to a CPU errrata
  KVM: arm64: vgic-v3: Make vtr_to_* helpers use architectural field symbols

Signed-off-by: Oliver Upton <oupton@kernel.org>
2026-08-19 14:05:49 -07:00
Linus Torvalds
4994ef0fe0 IOMMU updates for Linux v7.3:
- ARM SMMUv2:
   - Device-tree binding updates for Qualcomm Eliza, Maili, Shikra and
     IPQ9650 SoCs.
   - Add support for Qualcomm SM8450.
   - Numerous fixes for lifetime and ordering issues found by Sashiko in
     the Qualcomm driver.
 
 - ARM SMMUv3:
   - Fix interrupt type in device-tree binding example for NVIDIA CMDQV.
   - Numerous fixes for issues identified by Sashiko in the NVIDIA CMDQV
     driver.
   - Work around TLB erratum T264-SMMU-3 on Tegra264 by repeating the
     invalidation sequence.
   - Add support for HAFT (hardware access flag in table entries) when
     using SVA.
   - Probe for 52-bit addressing with a page size smaller than 64k ('DS')
     but don't do anything with it for now.
   - Minor driver improvements (remove sort_nonatomic(), use
     readl_relaxed_poll_timeout_atomic(), fix IOPF teardown ordering).
 
 - Intel VT-d:
   - Consolidation of complex enablement logic into a clean, priority-based
     state machine.
   - Support for the DMA_REMAP_OPT_OUT flag from the VT-d v5.2
     specification.
   - An update to cache_tag_flush_devtlb_psi() to use full-range constants
     instead of modifying shared variables for CACHE_TAG_NESTING_DEVTLB.
   - A fix for the UCTP context-table slot when copying root entries.
   - Fixes for several pre-existing issues reported by Sashiko.
   - General code cleanup and refinement.
 
 - AMD IOMMU:
   - Add SNP page-mode-0 support, enabling passthrough, v2 DMA page
     tables and host SVA on supporting systems.
   - Fix invalid PPR handling, COMPLETE_PPR responses and guest-mode
     reporting.
   - Improve Southbridge IOAPIC validation and remove the dependency on
     hard-coded device IDs.
   - Fix PCI-device lifetime, debugfs and diagnostic issues.
 
 - IOMMU core and IOMMUFD:
   - Restore serialization of the shared MSI-page list.
   - Fix SVA-handle publication and several IOMMUFD reference and error
     path leaks.
   - Return the expected zero result for invalid generic page-table
     translations.
   - Allocate per-CPU IOVA magazines lazily to reduce memory use on
     large systems.
 
 - PCI ATS:
   - Make VF support checks account for the associated PF and validate
     that VF and PF Smallest Translation Unit settings agree.
 
 - Platform drivers:
   - Fix Qualcomm runtime-PM, probe unwind, fault reporting and page
     table initialization races.
   - Rework Rockchip state handling and fix clock, probe and stale-fault
     handling.
   - Fix smaller issues in the MSM and MediaTek drivers.
 
 - Device-tree bindings:
   - Add new Qualcomm SMMU compatibles, convert the OMAP IOMMU binding
     to YAML, and fix the Tegra264 CMDQV interrupt example.
 
 - Various smaller cleanups, documentation fixes and a Rust IOMMU
   safety/readability improvement.
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Merge tag 'iommu-updates-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux

Pull iommu updates from Joerg Roedel:
 "ARM SMMUv2:
   - Device-tree binding updates for Qualcomm Eliza, Maili, Shikra and
     IPQ9650 SoCs
   - Add support for Qualcomm SM8450
   - Numerous fixes for lifetime and ordering issues found by Sashiko in
     the Qualcomm driver

  ARM SMMUv3:
   - Fix interrupt type in device-tree binding example for NVIDIA CMDQV
   - Numerous fixes for issues identified by Sashiko in the NVIDIA CMDQV
     driver
   - Work around TLB erratum T264-SMMU-3 on Tegra264 by repeating the
     invalidation sequence
   - Add support for HAFT (hardware access flag in table entries) when
     using SVA
   - Probe for 52-bit addressing with a page size smaller than 64k
     ('DS') but don't do anything with it for now
   - Minor driver improvements (remove sort_nonatomic(), use
     readl_relaxed_poll_timeout_atomic(), fix IOPF teardown ordering)

  Intel VT-d:
   - Consolidation of complex enablement logic into a clean,
     priority-based state machine
   - Support for the DMA_REMAP_OPT_OUT flag from the VT-d v5.2
     specification
   - An update to cache_tag_flush_devtlb_psi() to use full-range
     constants instead of modifying shared variables for
     CACHE_TAG_NESTING_DEVTLB
   - A fix for the UCTP context-table slot when copying root entries
   - Fixes for several pre-existing issues reported by Sashiko
   - General code cleanup and refinement

  AMD IOMMU:
   - Add SNP page-mode-0 support, enabling passthrough, v2 DMA page
     tables and host SVA on supporting systems
   - Fix invalid PPR handling, COMPLETE_PPR responses and guest-mode
     reporting
   - Improve Southbridge IOAPIC validation and remove the dependency on
     hard-coded device IDs
   - Fix PCI-device lifetime, debugfs and diagnostic issues

  IOMMU core and IOMMUFD:
   - Restore serialization of the shared MSI-page list
   - Fix SVA-handle publication and several IOMMUFD reference and error
     path leaks
   - Return the expected zero result for invalid generic page-table
     translations
   - Allocate per-CPU IOVA magazines lazily to reduce memory use on
     large systems

  PCI ATS:
   - Make VF support checks account for the associated PF and validate
     that VF and PF Smallest Translation Unit settings agree

  Platform drivers:
   - Fix Qualcomm runtime-PM, probe unwind, fault reporting and page
     table initialization races
   - Rework Rockchip state handling and fix clock, probe and stale-fault
     handling
   - Fix smaller issues in the MSM and MediaTek drivers

  Device-tree bindings:
   - Add new Qualcomm SMMU compatibles, convert the OMAP IOMMU binding
     to YAML, and fix the Tegra264 CMDQV interrupt example

  Various smaller cleanups, documentation fixes and a Rust IOMMU
  safety/readability improvement"

* tag 'iommu-updates-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux: (93 commits)
  iommu/amd: Add SNP page mode 0 support
  iommu/amd: Fix GN bit setting in COMPLETE_PPR_REQUEST command
  iommu/amd: Rate limit INVALID_PPR_REQUEST error logging
  iommu/amd: Fix missing CMD_COMPLETE_PPR response for invalid PPR requests
  iommu/amd: Introduce PPR_TAG_LAST_PAGE() macro
  iommu/amd: Fix incorrect device ID in invalid PASID error message
  iommu/vt-d: Flush context cache with correct SID when tearing down aliases
  iommu/vt-d: Tear down scalable-mode context on probe failure
  iommu/vt-d: Fix iopf_refcount leak on RID domain replacement
  iommu/vt-d: Clear Present bit before tearing down copied context entry
  iommu/vt-d: Fix copied_tables bitmap leak on error in copy_translation_tables
  iommu/vt-d: Cache max domain ID to avoid redundant calculation
  iommu/vt-d: Support the new DMA_REMAP_OPT_OUT flag bit
  iommu/vt-d: Remove dmar_disabled
  iommu/vt-d: Remove the 'force_on' variable
  iommu/vt-d: Call dmar_can_force_on() for tboot opt-in
  iommu/vt-d: Use dmar_can_force_on() for platform opt-in
  iommu/vt-d: Consolidate dmar policy management and force_on logic
  iommu/vt-d: Remove dead code when CONFIG_INTEL_IOMMU is not set
  iommu/vt-d: Force requesting ACS when tboot is enabled
  ...
2026-08-19 12:38:26 -07:00