io_uring uses call_rcu in the case it needs to signal an eventfd as a
result of an eventfd signal, since recursing eventfd signals are not
allowed. This should be calling the new call_rcu_hurry API to not delay
the signal.
Signed-off-by: Dylan Yudaken <dylany@meta.com>
Cc: Joel Fernandes (Google) <joel@joelfernandes.org>
Cc: Paul E. McKenney <paulmck@kernel.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Link: https://lore.kernel.org/r/20221215184138.795576-1-dylany@meta.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
There are a few kernel users like kfence that require 4k pages to work
correctly and do not support large mappings. They use set_memory_4k()
to break down those large mappings.
That, in turn relies on cpa_data->force_split option to indicate to
set_memory code that it should split page tables regardless of whether
the need to be.
But, a recent change added an optimization which would return early
if a set_memory request came in that did not change permissions. It
did not consult ->force_split and would mistakenly optimize away the
splitting that set_memory_4k() needs. This broke kfence.
Skip the same-permission optimization when ->force_split is set.
Fixes: 127960a05548 ("x86/mm: Inhibit _PAGE_NX changes from cpa_process_alias()")
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Tested-by: Marco Elver <elver@google.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/all/CA+G9fYuFxZTxkeS35VTZMXwQvohu73W3xbZ5NtjebsVvH6hCuA@mail.gmail.com/
Popuplate the shadow for the shared portion of the CPU entry area, i.e.
the read-only IDT mapping, during KASAN initialization. A recent change
modified KASAN to map the per-CPU areas on-demand, but forgot to keep a
shadow for the common area that is shared amongst all CPUs.
Map the common area in KASAN init instead of letting idt_map_in_cea() do
the dirty work so that it Just Works in the unlikely event more shared
data is shoved into the CPU entry area.
The bug manifests as a not-present #PF when software attempts to lookup
an IDT entry, e.g. when KVM is handling IRQs on Intel CPUs (KVM performs
direct CALL to the IRQ handler to avoid the overhead of INTn):
BUG: unable to handle page fault for address: fffffbc0000001d8
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 16c03a067 P4D 16c03a067 PUD 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 5 PID: 901 Comm: repro Tainted: G W 6.1.0-rc3+ #410
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
RIP: 0010:kasan_check_range+0xdf/0x190
vmx_handle_exit_irqoff+0x152/0x290 [kvm_intel]
vcpu_run+0x1d89/0x2bd0 [kvm]
kvm_arch_vcpu_ioctl_run+0x3ce/0xa70 [kvm]
kvm_vcpu_ioctl+0x349/0x900 [kvm]
__x64_sys_ioctl+0xb8/0xf0
do_syscall_64+0x2b/0x50
entry_SYSCALL_64_after_hwframe+0x46/0xb0
Fixes: 9fd429c28073 ("x86/kasan: Map shadow for percpu pages on demand")
Reported-by: syzbot+8cdd16fd5a6c0565e227@syzkaller.appspotmail.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20221110203504.1985010-6-seanjc@google.com
Add helpers to dedup code for aligning shadow address up/down to page
boundaries when translating an address to its shadow.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Link: https://lkml.kernel.org/r/20221110203504.1985010-5-seanjc@google.com
Rename the CPU entry area variables in kasan_init() to shorten their
names, a future fix will reference the beginning of the per-CPU portion
of the CPU entry area, and shadow_cpu_entry_per_cpu_begin is a bit much.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Link: https://lkml.kernel.org/r/20221110203504.1985010-4-seanjc@google.com
Populate a KASAN shadow for the entire possible per-CPU range of the CPU
entry area instead of requiring that each individual chunk map a shadow.
Mapping shadows individually is error prone, e.g. the per-CPU GDT mapping
was left behind, which can lead to not-present page faults during KASAN
validation if the kernel performs a software lookup into the GDT. The DS
buffer is also likely affected.
The motivation for mapping the per-CPU areas on-demand was to avoid
mapping the entire 512GiB range that's reserved for the CPU entry area,
shaving a few bytes by not creating shadows for potentially unused memory
was not a goal.
The bug is most easily reproduced by doing a sigreturn with a garbage
CS in the sigcontext, e.g.
int main(void)
{
struct sigcontext regs;
syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul);
syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
memset(®s, 0, sizeof(regs));
regs.cs = 0x1d0;
syscall(__NR_rt_sigreturn);
return 0;
}
to coerce the kernel into doing a GDT lookup to compute CS.base when
reading the instruction bytes on the subsequent #GP to determine whether
or not the #GP is something the kernel should handle, e.g. to fixup UMIP
violations or to emulate CLI/STI for IOPL=3 applications.
BUG: unable to handle page fault for address: fffffbc8379ace00
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 16c03a067 P4D 16c03a067 PUD 15b990067 PMD 15b98f067 PTE 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 3 PID: 851 Comm: r2 Not tainted 6.1.0-rc3-next-20221103+ #432
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
RIP: 0010:kasan_check_range+0xdf/0x190
Call Trace:
<TASK>
get_desc+0xb0/0x1d0
insn_get_seg_base+0x104/0x270
insn_fetch_from_user+0x66/0x80
fixup_umip_exception+0xb1/0x530
exc_general_protection+0x181/0x210
asm_exc_general_protection+0x22/0x30
RIP: 0003:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0003:0000000000000000 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000000001d0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Fixes: 9fd429c28073 ("x86/kasan: Map shadow for percpu pages on demand")
Reported-by: syzbot+ffb4f000dc2872c93f62@syzkaller.appspotmail.com
Suggested-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Link: https://lkml.kernel.org/r/20221110203504.1985010-3-seanjc@google.com
Recompute the physical address for each per-CPU page in the CPU entry
area, a recent commit inadvertantly modified cea_map_percpu_pages() such
that every PTE is mapped to the physical address of the first page.
Fixes: 9fd429c28073 ("x86/kasan: Map shadow for percpu pages on demand")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Link: https://lkml.kernel.org/r/20221110203504.1985010-2-seanjc@google.com
Now that the checkalias functionality is taken by CPA_NO_CHECK_ALIAS
rename the argument to better match is remaining purpose: primary,
matching __change_page_attr().
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20221110125544.661001508%40infradead.org
There is a cludge in change_page_attr_set_clr() that inhibits
propagating NX changes to the aliases (directmap and highmap) -- this
is a cludge twofold:
- it also inhibits the primary checks in __change_page_attr();
- it hard depends on single bit changes.
The introduction of set_memory_rox() triggered this last issue for
clearing both _PAGE_RW and _PAGE_NX.
Explicitly ignore _PAGE_NX in cpa_process_alias() instead.
Fixes: b38994948567 ("x86/mm: Implement native set_memory_rox()")
Reported-by: kernel test robot <oliver.sang@intel.com>
Debugged-by: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20221110125544.594991716%40infradead.org
The .checkalias argument to __change_page_attr_set_clr() is overloaded
and serves two different purposes:
- it inhibits the call to cpa_process_alias() -- as suggested by the
name; however,
- it also serves as 'primary' indicator for __change_page_attr()
( which in turn also serves as a recursion terminator for
cpa_process_alias() ).
Untangle these by extending the use of CPA_NO_CHECK_ALIAS to all
callsites that currently use .checkalias=0 for this purpose.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20221110125544.527267183%40infradead.org
It's a shame to hide useful comments in Changelogs, add some to the
code.
Shamelessly stolen from commit:
c40a56a781 ("x86/mm/init: Remove freed kernel image areas from alias mapping")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20221110125544.460677011%40infradead.org
The mask must not include bits above physical address mask. These bits
are reserved and can be used for other things. Bits 61 and 62 are used
for Linear Address Masking.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Alexander Potapenko <glider@google.com>
Link: https://lore.kernel.org/all/20221109165140.9137-2-kirill.shutemov%40linux.intel.com
Other architectures and the common mm/ use P*D_MASK, and P*D_SIZE.
Remove the duplicated P*D_PAGE_MASK and P*D_PAGE_SIZE which are only
used in x86/*.
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Link: https://lore.kernel.org/r/20220516185202.604654-1-tatashin@google.com
Since __HAVE_ARCH_* style guards have been depricated in favour of
defining the function name onto itself, convert pxxp_get().
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/Y2EUEBlQXNgaJgoI@hirez.programming.kicks-ass.net
The use of set_64bit() in X86_64 only code is pretty pointless, seeing
how it's a direct assignment. Remove all this nonsense.
[nathanchance: unbreak irte]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20221022114425.168036718%40infradead.org
Given that ptep_get_and_clear() uses cmpxchg8b, and that should be by
far the most common case, there's no point in having an optimized
variant for pmd/pud.
Introduce the pxx_xchg64() helper to implement the common logic once.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20221022114425.103392961%40infradead.org
On architectures where the PTE/PMD is larger than the native word size
(i386-PAE for example), READ_ONCE() can do the wrong thing. Use
pmdp_get_lockless() just like we use ptep_get_lockless().
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20221022114424.906110403%40infradead.org
Provide a native implementation of set_memory_rox(), avoiding the
double set_memory_ro();set_memory_x(); calls.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Now that text_poke is available before ftrace, remove the
SYSTEM_BOOTING exceptions.
Specifically, this cures a W+X case during boot.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20221025201057.945960823@infradead.org
Move poking_init() up a bunch; specifically move it right after
mm_init() which is right before ftrace_init().
This will allow simplifying ftrace text poking which currently has
a bunch of exceptions for early boot.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20221025201057.881703081@infradead.org
Instead of duplicating init_mm, allocate a fresh mm. The advantage is
that mm_alloc() has much simpler dependencies. Additionally it makes
more conceptual sense, init_mm has no (and must not have) user state
to duplicate.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20221025201057.816175235@infradead.org
Seth found that the CPU-entry-area; the piece of per-cpu data that is
mapped into the userspace page-tables for kPTI is not subject to any
randomization -- irrespective of kASLR settings.
On x86_64 a whole P4D (512 GB) of virtual address space is reserved for
this structure, which is plenty large enough to randomize things a
little.
As such, use a straight forward randomization scheme that avoids
duplicates to spread the existing CPUs over the available space.
[ bp: Fix le build. ]
Reported-by: Seth Jenkins <sethjenkins@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
KASAN maps shadow for the entire CPU-entry-area:
[CPU_ENTRY_AREA_BASE, CPU_ENTRY_AREA_BASE + CPU_ENTRY_AREA_MAP_SIZE]
This will explode once the per-cpu entry areas are randomized since it
will increase CPU_ENTRY_AREA_MAP_SIZE to 512 GB and KASAN fails to
allocate shadow for such big area.
Fix this by allocating KASAN shadow only for really used cpu entry area
addresses mapped by cea_map_percpu_pages()
Thanks to the 0day folks for finding and reporting this to be an issue.
[ dhansen: tweak changelog since this will get committed before peterz's
actual cpu-entry-area randomization ]
Signed-off-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Tested-by: Yujie Liu <yujie.liu@intel.com>
Cc: kernel test robot <yujie.liu@intel.com>
Link: https://lore.kernel.org/r/202210241508.2e203c3d-yujie.liu@intel.com
- Avoid trying to resolve operands in AML when there are none (Amadeusz
Sławiński).
- Fix indentation in include/acpi/acpixf.h to help applying patches
from the upstream ACPICA git (Hans de Goede).
- Make it possible to install an address space handler without
evaluating _REG for Operation Regions in the given address space (Hans
de Goede).
- Defer the evaluation of _REG for ECDT described ECs till the matching
EC device in the DSDT gets parsed and acpi_ec_add() gets called for
it (Hans de Goede).
- Fix EC address space handler unregistration (Hans de Goede).
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Merge tag 'acpi-6.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more ACPI updates from Rafael Wysocki:
"These fix an AML byte code execution issue in ACPICA and two issues in
the ACPI EC driver which requires rearranging ACPICA code.
Specifics:
- Avoid trying to resolve operands in AML when there are none
(Amadeusz Sławiński)
- Fix indentation in include/acpi/acpixf.h to help applying patches
from the upstream ACPICA git (Hans de Goede)
- Make it possible to install an address space handler without
evaluating _REG for Operation Regions in the given address space
(Hans de Goede)
- Defer the evaluation of _REG for ECDT described ECs till the
matching EC device in the DSDT gets parsed and acpi_ec_add() gets
called for it (Hans de Goede)
- Fix EC address space handler unregistration (Hans de Goede)"
* tag 'acpi-6.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: EC: Fix ECDT probe ordering issues
ACPI: EC: Fix EC address space handler unregistration
ACPICA: Allow address_space_handler Install and _REG execution as 2 separate steps
ACPICA: include/acpi/acpixf.h: Fix indentation
ACPICA: Fix operand resolution
- Avoid clearing the HFI status bit on systems without HFI support
which triggers unchecked MSR access errors (Srinivas Pandruvada).
- Add sm8450 and sm8550 QCom compatible string to DT bindings (Luca
Weiss, Neil Armstrong).
- Use devm_platform_get_and_ioremap_resource on the ST platform to
group two calls into a single one (Minghao Chi).
- Use GENMASK instead of bitmaps and validate the temperature after
reading it in the imx8mm_thermal driver (Marcus Folkesson).
- Convert generic-adc-thermal to DT schema (Rob Herring).
- Fix debug print message with inverted logic in the k3_j72xx_bandgap
driver (Keerthy).
- Fix memory leak on thermal_of_zone_register() failure (Ido Schimmel).
- Add support for IPQ8074 in the tsens thermal driver along with the DT
bindings (Robert Marko).
- Fix and rework the debugfs code in the tsens driver (Christian
Marangi).
- Add calibration and DT documentation for the imx8mm driver (Marek
Vasut).
- Add DT bindings and compatible for the Mediatek SoCs mt7981 and
mt7983 (Daniel Golle).
- Don't show an error message if it happens at probe time while it
will be deferred on the QCom SPMI ADC driver (Johan Hovold).
- Add HWMon support for the imx8mm board (Alexander Stein).
- Remove pointless include from the power allocator governor (Christophe
JAILLET).
- Add interrupt DT bindings for QCom SoCs SC8280XP, SM6350 and SM8450
(Krzysztof Kozlowski).
- Fix inaccurate warning message for the QCom tsens gen2 (Luca Weiss).
- Demote error log of thermal zone register to debug in the tsens QCom
driver (Manivannan Sadhasivam).
- Consolidate the the efuse values and the errata handling in the TI
Bandgap driver (Bryan Brattlof).
- Document Renesas RZ/Five as compatible with RZ/G2UL in the DT
bindings (Lad Prabhakar).
- Fix the irq handler return value in the LMh driver (Bjorn Andersson).
- Delete empty platform remove callback from imx_sc_thermal (Uwe
Kleine-König).
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Merge tag 'thermal-6.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more thermal control updates from Rafael Wysocki:
"These are updates of assorted thermal drivers, mostly for ARM
platforms, generally isolated and fairly straightforward, and the
recent Intel HFI driver fix for systems without HFI support.
Specifics:
- Avoid clearing the HFI status bit on systems without HFI support
which triggers unchecked MSR access errors (Srinivas Pandruvada)
- Add sm8450 and sm8550 QCom compatible string to DT bindings (Luca
Weiss, Neil Armstrong)
- Use devm_platform_get_and_ioremap_resource on the ST platform to
group two calls into a single one (Minghao Chi)
- Use GENMASK instead of bitmaps and validate the temperature after
reading it in the imx8mm_thermal driver (Marcus Folkesson)
- Convert generic-adc-thermal to DT schema (Rob Herring)
- Fix debug print message with inverted logic in the k3_j72xx_bandgap
driver (Keerthy)
- Fix memory leak on thermal_of_zone_register() failure (Ido
Schimmel)
- Add support for IPQ8074 in the tsens thermal driver along with the
DT bindings (Robert Marko)
- Fix and rework the debugfs code in the tsens driver (Christian
Marangi)
- Add calibration and DT documentation for the imx8mm driver (Marek
Vasut)
- Add DT bindings and compatible for the Mediatek SoCs mt7981 and
mt7983 (Daniel Golle)
- Don't show an error message if it happens at probe time while it
will be deferred on the QCom SPMI ADC driver (Johan Hovold)
- Add HWMon support for the imx8mm board (Alexander Stein)
- Remove pointless include from the power allocator governor
(Christophe JAILLET)
- Add interrupt DT bindings for QCom SoCs SC8280XP, SM6350 and SM8450
(Krzysztof Kozlowski)
- Fix inaccurate warning message for the QCom tsens gen2 (Luca Weiss)
- Demote error log of thermal zone register to debug in the tsens
QCom driver (Manivannan Sadhasivam)
- Consolidate the the efuse values and the errata handling in the TI
Bandgap driver (Bryan Brattlof)
- Document Renesas RZ/Five as compatible with RZ/G2UL in the DT
bindings (Lad Prabhakar)
- Fix the irq handler return value in the LMh driver (Bjorn
Andersson)
- Delete empty platform remove callback from imx_sc_thermal (Uwe
Kleine-König)"
* tag 'thermal-6.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (35 commits)
thermal/drivers/imx_sc_thermal: Drop empty platform remove function
thermal/drivers/qcom/lmh: Fix irq handler return value
dt-bindings: thermal: qcom-tsens: Add compatible for sm8550
thermal/drivers/st: Use devm_platform_get_and_ioremap_resource()
dt-bindings: thermal: rzg2l-thermal: Document RZ/Five SoC
dt-bindings: thermal: k3-j72xx: conditionally require efuse reg range
dt-bindings: thermal: k3-j72xx: elaborate on binding description
thermal/drivers/k3_j72xx_bandgap: Map fuse_base only for erratum workaround
thermal/drivers/k3_j72xx_bandgap: Remove fuse_base from structure
thermal/drivers/k3_j72xx_bandgap: Use bool for i2128 erratum flag
thermal/drivers/k3_j72xx_bandgap: Simplify k3_thermal_get_temp() function
thermal/drivers/qcom: Demote error log of thermal zone register to debug
thermal/drivers/qcom/temp-alarm: Fix inaccurate warning for gen2
dt-bindings: thermal: qcom-tsens: narrow interrupts for SC8280XP, SM6350 and SM8450
thermal/core/power allocator: Remove a useless include
thermal/drivers/imx8mm: Add hwmon support
thermal: qcom-spmi-adc-tm5: suppress probe-deferral error message
dt-bindings: thermal: mediatek: add compatible string for MT7986 and MT7981 SoC
thermal: ti-soc-thermal: Drop comma after SoC match table sentinel
thermal/drivers/imx: Add support for loading calibration data from OCOTP
...
This reverts commit 44ecda71fd.
All versions of this patch on the mailing list, including the version
that ended up getting merged, have portions of code guarded by the
non-existent CONFIG_ARM64_WORKAROUND_2645198 option. Although Anshuman
says he tested the code with some additional debug changes [1], I'm
hesitant to fix the CONFIG option and light up a bunch of code right
before I (and others) disappear for the end of year holidays, during
which time we won't be around to deal with any fallout.
So revert the change for now. We can bring back a fixed, tested version
for a later -rc when folks are thinking about things other than trees
and turkeys.
[1] https://lore.kernel.org/r/b6f61241-e436-5db1-1053-3b441080b8d6@arm.com
Reported-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/20221215094811.23188-1-lukas.bulwahn@gmail.com
Signed-off-by: Will Deacon <will@kernel.org>
GPIO core:
- teach gpiolib to work with software nodes for HW description
- remove ARCH_NR_GPIOS treewide as we no longer impose any limit on the number
of GPIOS since the allocation became entirely dynamic
- add support for HW quirks for Cirrus CS42L56 codec, Marvell NFC controller,
Freescale PCIe and Ethernet controller, Himax LCDs and Mediatek mt2701
- refactor OF quirk code
- some general refactoring of the OF and ACPI code, adding new helpers, minor
tweaks and fixes, making fwnode usage consistent etc.
GPIO uAPI:
- fix an issue where the user-space can trigger a NULL-pointer dereference in
the kernel by opening a device file, forcing a driver unbind and then calling
one of the syscalls on the associated file descriptor
New drivers:
- add gpio-latch: a new GPIO multiplexer based on latches connected to other
GPIOs
Driver updates:
- convert i2c GPIO expanders to using .probe_new()
- drop the gpio-sta2x11 driver
- factor out common code for the ACCES IDIO-16 family of controllers and use
this new library wherever applicable in drivers
- add DT support to gpio-hisi
- allow building gpio-davinci as a module and increase its maxItems property
- add support for a new model to gpio-pca9570
- other minor changes to various drivers
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Merge tag 'gpio-updates-for-v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
Pull gpio updates from Bartosz Golaszewski:
"We have a new GPIO multiplexer driver, bunch of driver updates and
refactoring in the core GPIO library.
GPIO core:
- teach gpiolib to work with software nodes for HW description
- remove ARCH_NR_GPIOS treewide as we no longer impose any limit on
the number of GPIOS since the allocation became entirely dynamic
- add support for HW quirks for Cirrus CS42L56 codec, Marvell NFC
controller, Freescale PCIe and Ethernet controller, Himax LCDs and
Mediatek mt2701
- refactor OF quirk code
- some general refactoring of the OF and ACPI code, adding new
helpers, minor tweaks and fixes, making fwnode usage consistent
etc.
GPIO uAPI:
- fix an issue where the user-space can trigger a NULL-pointer
dereference in the kernel by opening a device file, forcing a
driver unbind and then calling one of the syscalls on the
associated file descriptor
New drivers:
- add gpio-latch: a new GPIO multiplexer based on latches connected
to other GPIOs
Driver updates:
- convert i2c GPIO expanders to using .probe_new()
- drop the gpio-sta2x11 driver
- factor out common code for the ACCES IDIO-16 family of controllers
and use this new library wherever applicable in drivers
- add DT support to gpio-hisi
- allow building gpio-davinci as a module and increase its maxItems
property
- add support for a new model to gpio-pca9570
- other minor changes to various drivers"
* tag 'gpio-updates-for-v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (66 commits)
gpio: sim: set a limit on the number of GPIOs
gpiolib: protect the GPIO device against being dropped while in use by user-space
gpiolib: cdev: fix NULL-pointer dereferences
gpiolib: Provide to_gpio_device() helper
gpiolib: Unify access to the device properties
gpio: Do not include <linux/kernel.h> when not really needed.
gpio: pcf857x: Convert to i2c's .probe_new()
gpio: pca953x: Convert to i2c's .probe_new()
gpio: max732x: Convert to i2c's .probe_new()
dt-bindings: gpio: gpio-davinci: Increase maxItems in gpio-line-names
gpiolib: ensure that fwnode is properly set
gpio: sl28cpld: Replace irqchip mask_invert with unmask_base
gpiolib: of: Use correct fwnode for DT-probed chips
gpiolib: of: Drop redundant check in of_mm_gpiochip_remove()
gpiolib: of: Prepare of_mm_gpiochip_add_data() for fwnode
gpiolib: add support for software nodes
gpiolib: consolidate GPIO lookups
gpiolib: acpi: avoid leaking ACPI details into upper gpiolib layers
gpiolib: acpi: teach acpi_find_gpio() to handle data-only nodes
gpiolib: acpi: change acpi_find_gpio() to accept firmware node
...
Merge additional ACPI EC driver fixes for 6.2-rc1:
- Fix EC address space handler unregistration (Hans de Goede).
- Defer the evaluation of _REG for ECDT described ECs till the matching
EC device in the DSDT gets parsed and acpi_ec_add() gets called for
it (Hans de Goede).
* acpi-ec:
ACPI: EC: Fix ECDT probe ordering issues
ACPI: EC: Fix EC address space handler unregistration
Switch omapfb to the gpiod API, some failure path fixes and
UML build fixes.
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Merge tag 'fbdev-for-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev
Pull fbdev updates from Helge Deller:
"The most relevant change are the patches from Dmitry Torokhov to
switch omapfb to the gpiod API.
The other patches are small and fix e.g. UML build issues, improve the
error paths and cleanup code"
* tag 'fbdev-for-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev: (32 commits)
fbdev: fbcon: release buffer when fbcon_do_set_font() failed
fbdev: sh_mobile_lcdcfb: use sysfs_emit() to instead of scnprintf()
fbdev: uvesafb: use sysfs_emit() to instead of scnprintf()
fbdev: uvesafb: Simplify uvesafb_remove()
fbdev: uvesafb: Fixes an error handling path in uvesafb_probe()
fbdev: uvesafb: don't build on UML
fbdev: geode: don't build on UML
fbdev: ep93xx-fb: Add missing clk_disable_unprepare in ep93xxfb_probe()
fbdev: matroxfb: Convert to i2c's .probe_new()
fbdev: da8xx-fb: add missing regulator_disable() in fb_probe
fbdev: controlfb: fix spelling mistake "paramaters"->"parameters"
fbdev: vermilion: decrease reference count in error path
fbdev: smscufx: fix error handling code in ufx_usb_probe
fbdev: via: Fix error in via_core_init()
fbdev: pm2fb: fix missing pci_disable_device()
fbdev: pxafb: Remove unnecessary print function dev_err()
fbdev: omapfb: panel-sharp-ls037v7dw01: fix included headers
fbdev: omapfb: panel-tpo-td028ttec1: stop including gpio.h
fbdev: omapfb: panel-lgphilips-lb035q02: remove backlight GPIO handling
fbdev: omapfb: encoder-opa362: fix included headers
...
Merge additional ACPICA changes for 6.2-rc1:
- Avoid trying to resolve operands in AML when there are none (Amadeusz
Sławiński).
- Fix indentation in include/acpi/acpixf.h to help applying patches
from the upstream ACPICA git (Hans de Goede).
- Make it possible to install an address space handler without
evaluating _REG for Operation Regions in the given address space (Hans
de Goede).
* acpica:
ACPICA: Allow address_space_handler Install and _REG execution as 2 separate steps
ACPICA: include/acpi/acpixf.h: Fix indentation
ACPICA: Fix operand resolution
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Merge tag '6.2-rc-ksmbd-server-fixes' of git://git.samba.org/ksmbd
Pull ksmbd updates from Steve French:
"Six ksmbd server fixes"
* tag '6.2-rc-ksmbd-server-fixes' of git://git.samba.org/ksmbd:
ksmbd: Convert to use sysfs_emit()/sysfs_emit_at() APIs
ksmbd: Fix resource leak in smb2_lock()
ksmbd: Fix resource leak in ksmbd_session_rpc_open()
ksmbd: replace one-element arrays with flexible-array members
ksmbd: use F_SETLK when unlocking a file
ksmbd: set SMB2_SESSION_FLAG_ENCRYPT_DATA when enforcing data encryption for this share
Update the reported maximum shader clock to the value which can
be guarded to be achieved on all cards. This is to align with
Window setting.
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.0.x
To better support UMD pstate profilings, the GPO feature needs
to be switched on/off accordingly.
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.0.x
To better support UMD pstate profilings, the GPO feature needs
to be switched on/off accordingly.
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.0.x
Because the single task locking series got reordered ahead of the
timeout and completion lock changes, two hunks inadvertently ended up
using __io_fill_cqe_req() rather than io_fill_cqe_req(). This meant
that we dropped overflow handling in those two spots. Reinstate the
correct CQE filling helper.
Fixes: f66f73421f ("io_uring: skip spinlocking for ->task_complete")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
