- Fail the 'perf test record' entry on error, fixing a regression where just
setup stuff like allocating memory and not the actual things being tested failed.
- Fixup disabling of -Wdeprecated-declarations for the python scripting engine, the
previous attempt had a brown paper bag thinko.
- Fix branch stack sampling test to include sanity check for branch filter on PowerPC.
- Update is_ignored_symbol function to match the kernel ignored list, fixing running
the 'perf test' entry that compares resolving symbols from kallsyms to resolving from
vmlinux.
- Augment the data source type with ARM's neoverse_spe list, the previous code
was limited in its search resolving the data source.
- Fix some clang 5 variable set but unused cases.
- Get a perf cgroup more portably in BPF as the __builtin_preserve_enum_value builtin is
not available in older versions of clang. In those cases we can forgo BPF's CO-RE (Compile
Once, Run Everywhere).
- More Fixes for Intel's hybrid CPU model.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-tools-fixes-for-v6.0-2022-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux
Pull perf tools fixes from Arnaldo Carvalho de Melo:
- Fail the 'perf test record' entry on error, fixing a regression where
just setup stuff like allocating memory and not the actual things
being tested failed.
- Fixup disabling of -Wdeprecated-declarations for the python scripting
engine, the previous attempt had a brown paper bag thinko.
- Fix branch stack sampling test to include sanity check for branch
filter on PowerPC.
- Update is_ignored_symbol function to match the kernel ignored list,
fixing running the 'perf test' entry that compares resolving symbols
from kallsyms to resolving from vmlinux.
- Augment the data source type with ARM's neoverse_spe list, the
previous code was limited in its search resolving the data source.
- Fix some clang 5 variable set but unused cases.
- Get a perf cgroup more portably in BPF as the
__builtin_preserve_enum_value builtin is not available in older
versions of clang. In those cases we can forgo BPF's CO-RE (Compile
Once, Run Everywhere).
- More Fixes for Intel's hybrid CPU model.
* tag 'perf-tools-fixes-for-v6.0-2022-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
perf build: Fixup disabling of -Wdeprecated-declarations for the python scripting engine
perf tests mmap-basic: Remove unused variable to address clang 15 warning
perf parse-events: Ignore clang 15 warning about variable set but unused in bison produced code
perf tests record: Fail the test if the 'errs' counter is not zero
perf test: Fix test case 87 ("perf record tests") for hybrid systems
perf arm-spe: augment the data source type with neoverse_spe list
perf tests vmlinux-kallsyms: Update is_ignored_symbol function to match the kernel ignored list
perf tests powerpc: Fix branch stack sampling test to include sanity check for branch filter
perf parse-events: Remove "not supported" hybrid cache events
perf print-events: Fix "perf list" can not display the PMU prefix for some hybrid cache events
perf tools: Get a perf cgroup more portably in BPF
* Skip tests that require EPT when it is not available
* Do not hang when a test fails with an empty stack trace
* avoid spurious failure when running access_tracking_perf_test in a KVM guest
* work around GCC's tendency to optimize loops into mem*() functions, which
breaks because the guest code in selftests cannot call into PLTs
* fix -Warray-bounds error in fix_hypercall_test
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Merge tag 'for-linus-6.0' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"A small fix to the reported set of supported CPUID bits, and selftests
fixes:
- Skip tests that require EPT when it is not available
- Do not hang when a test fails with an empty stack trace
- avoid spurious failure when running access_tracking_perf_test in a
KVM guest
- work around GCC's tendency to optimize loops into mem*() functions,
which breaks because the guest code in selftests cannot call into
PLTs
- fix -Warray-bounds error in fix_hypercall_test"
* tag 'for-linus-6.0' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: selftests: Compare insn opcodes directly in fix_hypercall_test
KVM: selftests: Implement memcmp(), memcpy(), and memset() for guest use
KVM: x86: Hide IA32_PLATFORM_DCA_CAP[31:0] from the guest
KVM: selftests: Gracefully handle empty stack traces
KVM: selftests: replace assertion with warning in access_tracking_perf_test
KVM: selftests: Skip tests that require EPT when it is not available
switch to common helper to initialize rlc firmware
for gfx11
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
To initialzie rlc firmware according to rlc
firmware header version
v2: squash in backwards compat fix
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
To initialize rlc firmware in header v2_4
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
To initialize rlc firmware in header v2_3
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
To initialize rlc firmware in header v2_2
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
To initialize rlc firmware in header v2_1
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
To initialize rlc firmware in header v2_0
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Add a new label to deduplicate skipping device code in the
acpi_lpss_create_device(). No functional change intended.
While at it, convert the last conditional to use the classical
pattern, i.e.
if (err)
...handle err...
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
After the commit 6505e452371d ("ACPI: LPSS: Use the helper
acpi_dev_get_memory_resources()") the list is empty or
contains only resource of IORESOURCE_MEM type. Hence, no
need to check for the type, and since we break after the
first found, no need to iterate over full list. That said,
replace loop with first entry retrieval.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Merge changes related to ACPI device enumeration and ACPI support for
platform devices for 6.1-rc1:
- Clean up ACPI platform devices support code (Andy Shevchenko, John
Garry).
- Clean up ACPI bus management code (Andy Shevchenko, ye xingchen).
- Add support for multiple DMA windows with different offsets to the
ACPI device enumeration code and use it on LoongArch (Jianmin Lv).
* acpi-scan:
LoongArch: Use acpi_arch_dma_setup() and remove ARCH_HAS_PHYS_TO_DMA
ACPI: scan: Support multiple DMA windows with different offsets
* acpi-bus:
ACPI: bus: Refactor ACPI matching functions for better readability
ACPI: bus: Drop kernel doc annotation from acpi_bus_notify()
ACPI: bus: Remove the unneeded result variable
* acpi-platform:
ACPI: platform: Use PLATFORM_DEVID_NONE in acpi_create_platform_device()
ACPI: platform: Sort forbidden_id_list[] in ascending order
ACPI: platform: Use sizeof(*pointer) instead of sizeof(type)
ACPI: platform: Remove redundant print on -ENOMEM
ACPI: platform: Get rid of redundant 'else'
Merge ACPI resource management and ACPI power management chages for
6.1-rc1:
- Filter out non-memory resources in is_memory(), add a helper
function to find all memory type resources of an ACPI device object
and use that function in 3 places (Heikki Krogerus).
- Add IRQ override quirks for Asus Vivobook K3402ZA/K3502ZA and ASUS
model S5402ZA (Tamim Khan, Kellen Renshaw).
- Fix acpi_dev_state_d0() kerneldoc (Sakari Ailus).
- Fix up suspend-to-idle support on ASUS Rembrandt laptops (Mario
Limonciello).
* acpi-resource:
ACPI: resource: Add ASUS model S5402ZA to quirks
usb: typec: intel_pmc_mux: Use the helper acpi_dev_get_memory_resources()
ACPI: resource: Skip IRQ override on Asus Vivobook K3402ZA/K3502ZA
ACPI: LPSS: Use the helper acpi_dev_get_memory_resources()
ACPI: APD: Use the helper acpi_dev_get_memory_resources()
ACPI: resource: Add helper function acpi_dev_get_memory_resources()
ACPI: resource: Filter out the non memory resources in is_memory()
* acpi-pm:
ACPI: x86: s2idle: Add another ID to s2idle_dmi_table
ACPI: x86: s2idle: Fix a NULL pointer dereference
ACPI: x86: s2idle: Add a quirk for ASUSTeK COMPUTER INC. ROG Flow X13
ACPI: x86: s2idle: Add a quirk for Lenovo Slim 7 Pro 14ARH7
ACPI: x86: s2idle: Add a quirk for ASUS ROG Zephyrus G14
ACPI: x86: s2idle: Add a quirk for ASUS TUF Gaming A17 FA707RE
ACPI: x86: s2idle: Add module parameter to prefer Microsoft GUID
ACPI: x86: s2idle: If a new AMD _HID is missing assume Rembrandt
ACPI: x86: s2idle: Move _HID handling for AMD systems into structures
ACPI: PM: Fix acpi_dev_state_d0() kerneldoc
Merge changes regarding the management of ACPI device objects for
6.1-rc1:
- Rename ACPI device object reference counting functions (Rafael
Wysocki).
- Rearrange ACPI device object initialization code (Rafael Wysocki).
- Drop parent field from struct acpi_device (Rafael Wysocki).
- Extend the the int3472-tps68470 driver to support multiple consumers
of a single TPS68470 along with the requisite framework-level
support (Daniel Scally).
* acpi-dev:
platform/x86: int3472: Add board data for Surface Go2 IR camera
platform/x86: int3472: Support multiple gpio lookups in board data
platform/x86: int3472: Support multiple clock consumers
ACPI: bus: Add iterator for dependent devices
ACPI: scan: Add acpi_dev_get_next_consumer_dev()
ACPI: property: Use acpi_dev_parent()
ACPI: Drop redundant acpi_dev_parent() header
ACPI: PM: Fix NULL argument handling in acpi_device_get/set_power()
ACPI: Drop parent field from struct acpi_device
ACPI: scan: Eliminate __acpi_device_add()
ACPI: scan: Rearrange initialization of ACPI device objects
ACPI: scan: Rename acpi_bus_get_parent() and rearrange it
ACPI: Rename acpi_bus_get/put_acpi_device()
On one of the Chrome system, if we define more than 12 trip points,
probe for thermal sensor fails with
"int3403 thermal: probe of INTC1046:03 failed with error -22"
and throws an error as
"thermal_sys: Error: Incorrect number of thermal trips".
The thermal_zone_device_register() interface needs maximum
number of trip points supported in a zone as an argument.
This number can't exceed THERMAL_MAX_TRIPS, which is currently
set to 12. To address this issue, THERMAL_MAX_TRIPS value
has to be increased.
This interface also has an argument to specify a mask of trips
which are writable. This mask is defined as an int.
This mask sets the ceiling for increasing maximum number of
supported trips. With the current implementation, maximum number
of trips can be supported is 31.
Also, THERMAL_MAX_TRIPS macro is used in one place only.
So, remove THERMAL_MAX_TRIPS macro and compare num_trips
directly with using a macro BITS_PER_TYPE(int)-1.
Signed-off-by: Sumeet Pawnikar <sumeet.r.pawnikar@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
It turns out Apple doesn't capitalise the "mini" in "Macmini" in DMI, which
is inconsistent with other model line names.
Correct the capitalisation of Macmini in the quirk for skipping loading
platform certs on T2 Macs.
Currently users get:
------------[ cut here ]------------
[Firmware Bug]: Page fault caused by firmware at PA: 0xffffa30640054000
WARNING: CPU: 1 PID: 8 at arch/x86/platform/efi/quirks.c:735 efi_crash_gracefully_on_page_fault+0x55/0xe0
Modules linked in:
CPU: 1 PID: 8 Comm: kworker/u12:0 Not tainted 5.18.14-arch1-2-t2 #1 4535eb3fc40fd08edab32a509fbf4c9bc52d111e
Hardware name: Apple Inc. Macmini8,1/Mac-7BA5B2DFE22DDD8C, BIOS 1731.120.10.0.0 (iBridge: 19.16.15071.0.0,0) 04/24/2022
Workqueue: efi_rts_wq efi_call_rts
...
---[ end trace 0000000000000000 ]---
efi: Froze efi_rts_wq and disabled EFI Runtime Services
integrity: Couldn't get size: 0x8000000000000015
integrity: MODSIGN: Couldn't get UEFI db list
efi: EFI Runtime Services are disabled!
integrity: Couldn't get size: 0x8000000000000015
integrity: Couldn't get UEFI dbx list
Fixes: 155ca952c7 ("efi: Do not import certificates from UEFI Secure Boot for T2 Macs")
Cc: stable@vger.kernel.org
Cc: Aditya Garg <gargaditya08@live.com>
Tested-by: Samuel Jiang <chyishian.jiang@gmail.com>
Signed-off-by: Orlando Chamberlain <redecorating@protonmail.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Some last minute fixes. virtio-blk is the most important one
since it was actually seen in the field, but the rest
of them are small and clearly safe, everything here has
been in next for a while.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio fixes from Michael Tsirkin:
"Some last minute fixes.
The virtio-blk one is the most important one since it was actually
seen in the field, but the rest of them are small and clearly safe,
everything here has been in next for a while"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
vdpa/mlx5: Fix MQ to support non power of two num queues
vduse: prevent uninitialized memory accesses
virtio-blk: Fix WARN_ON_ONCE in virtio_queue_rq()
virtio_test: fixup for vq reset
virtio-crypto: fix memory-leak
vdpa/ifcvf: fix the calculation of queuepair
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Merge tag 'block-6.0-2022-09-29' of git://git.kernel.dk/linux
Pull block fixes from Jens Axboe:
"A single NVMe pull request via Christoph with a few fixes that should
go into the 6.0 release:
- Fix IOC_PR_CLEAR and IOC_PR_RELEASE ioctls for nvme devices
(Michael Kelley)
- Disable Write Zeroes on Phison E3C/E4C (Tina Hsu)"
* tag 'block-6.0-2022-09-29' of git://git.kernel.dk/linux:
nvme-pci: disable Write Zeroes on Phison E3C/E4C
nvme: Fix IOC_PR_CLEAR and IOC_PR_RELEASE ioctls for nvme devices
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Merge tag 'io_uring-6.0-2022-09-29' of git://git.kernel.dk/linux
Pull io_uring fixes from Jens Axboe:
"Two fixes that should go into 6.0:
- Tweak the single issuer logic to register the task at creation,
rather than at first submit. SINGLE_ISSUER was added for 6.0, and
after some discussion on this, we decided to make it a bit stricter
while it's still possible to do so (Dylan).
- Stefan from Samba had some doubts on the level triggered poll that
was added for this release. Rather than attempt to mess around with
it now, just do the quick one-liner to disable it for release and
we have time to discuss and change it for 6.1 instead (me)"
* tag 'io_uring-6.0-2022-09-29' of git://git.kernel.dk/linux:
io_uring/poll: disable level triggered poll
io_uring: register single issuer task at creation
- Revert crypto acomp migration (Guilherme G. Piccoli)
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Merge tag 'pstore-v6.0-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull pstore revert from Kees Cook:
"A misbehavior with some compression backends in pstore was just
discovered due to the recent crypto acomp migration.
Since we're so close to release, it seems better to just simply revert
it, and we can figure out what's going on without leaving it broken
for a release.
- Revert crypto acomp migration (Guilherme G. Piccoli)"
* tag 'pstore-v6.0-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
Revert "pstore: migrate to crypto acomp interface"
- fix the check for pwm support on non-A8K platforms in gpio-mvebu
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Merge tag 'gpio-fixes-for-v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
Pull gpio fixes from Bartosz Golaszewski:
"One more fix for the upcoming release:
- fix the check for pwm support on non-A8K platforms in gpio-mvebu"
* tag 'gpio-fixes-for-v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
gpio: mvebu: Fix check for pwm support on non-A8K platforms
This reverts commit e4f0a7ec58.
When using this new interface, both efi_pstore and ramoops
backends are unable to properly decompress dmesg if using
zstd, lz4 and lzo algorithms (and maybe more). It does succeed
with deflate though.
The message observed in the kernel log is:
[2.328828] pstore: crypto_acomp_decompress failed, ret = -22!
The pstore infrastructure is able to collect the dmesg with
both backends tested, but since decompression fails it's
unreadable. With this revert everything is back to normal.
Fixes: e4f0a7ec58 ("pstore: migrate to crypto acomp interface")
Cc: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220929215515.276486-1-gpiccoli@igalia.com
amdgpu:
- GC 11.x fixes
- SMU 13.x fixes
- DCN 3.1.4 fixes
- DCN 3.2.x fixes
- GC 9.x fix
- Fence fix
- SR-IOV supend/resume fix
- PSR regression fix
i915:
- Restrict forced preemption to the active context
- Restrict perf_limit_reasons to the supported platforms - gen11+
bridge:
- analogix: Revert earlier suspend fix
- lt8912b: Fix corrupt display output
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Merge tag 'drm-fixes-2022-09-30-1' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Last set of fixes for 6.0 hopefully - minor bridge fixes, i915 fixes,
and a bunch of amdgpu fixes for new IP blocks, along with a couple of
regression fixes. Should be all set for merge window next week.
amdgpu:
- GC 11.x fixes
- SMU 13.x fixes
- DCN 3.1.4 fixes
- DCN 3.2.x fixes
- GC 9.x fix
- Fence fix
- SR-IOV supend/resume fix
- PSR regression fix
i915:
- Restrict forced preemption to the active context
- Restrict perf_limit_reasons to the supported platforms - gen11+
bridge:
- analogix: Revert earlier suspend fix
- lt8912b: Fix corrupt display output"
* tag 'drm-fixes-2022-09-30-1' of git://anongit.freedesktop.org/drm/drm: (26 commits)
drm/amd/display: Prevent OTG shutdown during PSR SU
drm/i915/gt: Perf_limit_reasons are only available for Gen11+
drm/amdgpu: Add amdgpu suspend-resume code path under SRIOV
drm/amdgpu: Remove fence_process in count_emitted
drm/amdgpu: Correct the position in patch_cond_exec
drm/amd/display: fill in clock values when DPM is not enabled
drm/amd/display: Avoid unnecessary pixel rate divider programming
drm/amd/display: Remove assert for odm transition case
drm/amd/display: Fix typo in get_pixel_rate_div
drm/amd/display: Fix audio on display after unplugging another
drm/amd/display: Add explicit FIFO disable for DP blank
drm/amd/display: Wrap OTG disable workaround with FIFO control
drm/amd/display: Do DIO FIFO enable after DP video stream enable
drm/amd/display: Update DCN32 to use new SR latencies
drm/amd/display: Avoid avoid unnecessary pixel rate divider programming
drm/amdkfd: fix dropped interrupt in kfd_int_process_v11
drm/amdgpu: pass queue size and is_aql_queue to MES
drm/amdkfd: fix MQD init for GFX11 in init_mqd
drm/amd/pm: use adverse selection for dpm features unsupported by driver
drm/amd/pm: enable gfxoff feature for SMU 13.0.0
...
Use macro definitions ___constant_swab64 and ___constant_swab32
to simplify __bswapdi2() and __bswapsi2().
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Silence the following two warnings when make W=1:
CC arch/mips/lib/bswapsi.o
arch/mips/lib/bswapsi.c:5:22: warning: no previous prototype for '__bswapsi2' [-Wmissing-prototypes]
unsigned int notrace __bswapsi2(unsigned int u)
^~~~~~~~~~
CC arch/mips/lib/bswapdi.o
arch/mips/lib/bswapdi.c:5:28: warning: no previous prototype for '__bswapdi2' [-Wmissing-prototypes]
unsigned long long notrace __bswapdi2(unsigned long long u)
^~~~~~~~~~
AR arch/mips/lib/built-in.a
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Clean up config files by:
- removing configs that were deleted in the past
- removing configs not in tree and without recently pending patches
- adding new configs that are replacements for old configs in the file
For some detailed information, see Link.
Link: https://lore.kernel.org/kernel-janitors/20220929090645.1389-1-lukas.bulwahn@gmail.com/
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Directly compare the expected versus observed hypercall instructions when
verifying that KVM patched in the native hypercall (FIX_HYPERCALL_INSN
quirk enabled). gcc rightly complains that doing a 4-byte memcpy() with
an "unsigned char" as the source generates an out-of-bounds accesses.
Alternatively, "exp" and "obs" could be declared as 3-byte arrays, but
there's no known reason to copy locally instead of comparing directly.
In function ‘assert_hypercall_insn’,
inlined from ‘guest_main’ at x86_64/fix_hypercall_test.c:91:2:
x86_64/fix_hypercall_test.c:63:9: error: array subscript ‘unsigned int[0]’
is partly outside array bounds of ‘unsigned char[1]’ [-Werror=array-bounds]
63 | memcpy(&exp, exp_insn, sizeof(exp));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
x86_64/fix_hypercall_test.c: In function ‘guest_main’:
x86_64/fix_hypercall_test.c:42:22: note: object ‘vmx_hypercall_insn’ of size 1
42 | extern unsigned char vmx_hypercall_insn;
| ^~~~~~~~~~~~~~~~~~
x86_64/fix_hypercall_test.c:25:22: note: object ‘svm_hypercall_insn’ of size 1
25 | extern unsigned char svm_hypercall_insn;
| ^~~~~~~~~~~~~~~~~~
In function ‘assert_hypercall_insn’,
inlined from ‘guest_main’ at x86_64/fix_hypercall_test.c:91:2:
x86_64/fix_hypercall_test.c:64:9: error: array subscript ‘unsigned int[0]’
is partly outside array bounds of ‘unsigned char[1]’ [-Werror=array-bounds]
64 | memcpy(&obs, obs_insn, sizeof(obs));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
x86_64/fix_hypercall_test.c: In function ‘guest_main’:
x86_64/fix_hypercall_test.c:25:22: note: object ‘svm_hypercall_insn’ of size 1
25 | extern unsigned char svm_hypercall_insn;
| ^~~~~~~~~~~~~~~~~~
x86_64/fix_hypercall_test.c:42:22: note: object ‘vmx_hypercall_insn’ of size 1
42 | extern unsigned char vmx_hypercall_insn;
| ^~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make: *** [../lib.mk:135: tools/testing/selftests/kvm/x86_64/fix_hypercall_test] Error 1
Fixes: 6c2fa8b20d ("selftests: KVM: Test KVM_X86_QUIRK_FIX_HYPERCALL_INSN")
Cc: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Message-Id: <20220928233652.783504-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Implement memcmp(), memcpy(), and memset() to override the compiler's
built-in versions in order to guarantee that the compiler won't generate
out-of-line calls to external functions via the PLT. This allows the
helpers to be safely used in guest code, as KVM selftests don't support
dynamic loading of guest code.
Steal the implementations from the kernel's generic versions, sans the
optimizations in memcmp() for unaligned accesses.
Put the utilities in a separate compilation unit and build with
-ffreestanding to fudge around a gcc "feature" where it will optimize
memset(), memcpy(), etc... by generating a recursive call. I.e. the
compiler optimizes itself into infinite recursion. Alternatively, the
individual functions could be tagged with
optimize("no-tree-loop-distribute-patterns"), but using "optimize" for
anything but debug is discouraged, and Linus NAK'd the use of the flag
in the kernel proper[*].
https://lore.kernel.org/lkml/CAHk-=wik-oXnUpfZ6Hw37uLykc-_P0Apyn2XuX-odh-3Nzop8w@mail.gmail.com
Cc: Andrew Jones <andrew.jones@linux.dev>
Cc: Anup Patel <anup@brainfault.org>
Cc: Atish Patra <atishp@atishpatra.org>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Janosch Frank <frankja@linux.ibm.com>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220928233652.783504-2-seanjc@google.com>
Reviewed-by: Andrew Jones <andrew.jones@linux.dev>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The only thing reported by CPUID.9 is the value of
IA32_PLATFORM_DCA_CAP[31:0] in EAX. This MSR doesn't even exist in the
guest, since CPUID.1:ECX.DCA[bit 18] is clear in the guest.
Clear CPUID.9 in KVM_GET_SUPPORTED_CPUID.
Fixes: 24c82e576b ("KVM: Sanitize cpuid")
Signed-off-by: Jim Mattson <jmattson@google.com>
Message-Id: <20220922231854.249383-1-jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Bail out of test_dump_stack() if the stack trace is empty rather than
invoking addr2line with zero addresses. The problem with the latter is
that addr2line will block waiting for addresses to be passed in via
stdin, e.g. if running a selftest from an interactive terminal.
Opportunistically fix up the comment that mentions skipping 3 frames
since only 2 are skipped in the code.
Cc: Vipin Sharma <vipinsh@google.com>
Cc: Sean Christopherson <seanjc@google.com>
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20220922231724.3560211-1-dmatlack@google.com>
[Small tweak to keep backtrace() call close to if(). - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Page_idle uses {ptep/pmdp}_clear_young_notify which in turn calls
the mmu notifier callback ->clear_young(), which purposefully
does not flush the TLB.
When running the test in a nested guest, point 1. of the test
doc header is violated, because KVM TLB is unbounded by size
and since no flush is forced, KVM does not update the sptes
accessed/idle bits resulting in guest assertion failure.
More precisely, only the first ACCESS_WRITE in run_test() actually
makes visible changes, because sptes are created and the accessed
bit is set to 1 (or idle bit is 0). Then the first mark_memory_idle()
passes since access bit is still one, and sets all pages as idle
(or not accessed). When the next write is performed, the update
is not flushed therefore idle is still 1 and next mark_memory_idle()
fails.
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20220926082923.299554-1-eesposit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Now that Clang's -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
option is no longer required, remove it from the command line. Clang 16
and later will warn when it is used, which will cause Kconfig to think
it can't use -ftrivial-auto-var-init=zero at all. Check for whether it
is required and only use it when so.
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: linux-kbuild@vger.kernel.org
Cc: llvm@lists.linux.dev
Cc: stable@vger.kernel.org
Fixes: f02003c860 ("hardening: Avoid harmless Clang option under CONFIG_INIT_STACK_ALL_ZERO")
Signed-off-by: Kees Cook <keescook@chromium.org>
Fix the following build errors:
arch/sparc/mm/srmmu.c: In function ‘smp_flush_page_for_dma’:
arch/sparc/mm/srmmu.c:1639:13: error: cast between incompatible function types from ‘void (*)(long unsigned int)’ to ‘void (*)(long unsigned int, long unsigned int, long unsigned int, long unsigned int, long unsigned int)’ [-Werror=cast-function-type]
1639 | xc1((smpfunc_t) local_ops->page_for_dma, page);
| ^
arch/sparc/mm/srmmu.c: In function ‘smp_flush_cache_mm’:
arch/sparc/mm/srmmu.c:1662:29: error: cast between incompatible function types from ‘void (*)(struct mm_struct *)’ to ‘void (*)(long unsigned int, long unsigned int, long unsigned int, long unsigned int, long unsigned int)’ [-Werror=cast-function-type]
1662 | xc1((smpfunc_t) local_ops->cache_mm, (unsigned long) mm);
|
[ ... ]
Compile-tested only.
Fixes: 552a23a0e5 ("Makefile: Enable -Wcast-function-type")
Cc: stable@vger.kernel.org
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Tested-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220830205854.1918026-1-bvanassche@acm.org
With commit 987f20a9dc ("a.out: Remove the a.out implementation"), the
use of the special taso flag for alpha architectures in the linux_binprm
struct is gone.
Remove the definition of taso in the linux_binprm struct.
No functional change.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220929203903.9475-1-lukas.bulwahn@gmail.com
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Merge tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull coredump fix from Al Viro:
"Fix for breakage in dump_user_range()"
* tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
[coredump] don't use __kernel_write() on kmap_local_page()
checkpatch does not point out that VM_BUG_ON() and friends should be
avoided, however, Linus notes:
VM_BUG_ON() has the exact same semantics as BUG_ON. It is literally
no different, the only difference is "we can make the code smaller
because these are less important". [1]
So let's warn on VM_BUG_ON() and other BUG variants as well. While at it,
make it clearer that the kernel really shouldn't be crashed.
As there are some subsystem BUG macros that actually don't end up crashing
the kernel -- for example, KVM_BUG_ON() -- exclude these manually.
[1] https://lore.kernel.org/r/CAHk-=wg40EAZofO16Eviaj7mfqDhZ2gVEbvfsMf6gYzspRjYvw@mail.gmail.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20220923113426.52871-3-david@redhat.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Linus notes [1] that the introduction of new code that uses VM_BUG_ON()
is just as bad as BUG_ON(), because it will crash the kernel on
distributions that enable CONFIG_DEBUG_VM (like Fedora):
VM_BUG_ON() has the exact same semantics as BUG_ON. It is literally
no different, the only difference is "we can make the code smaller
because these are less important". [2]
This resulted in a more generic discussion about usage of BUG() and
friends. While there might be corner cases that still deserve a BUG_ON(),
most BUG_ON() cases should simply use WARN_ON_ONCE() and implement a
recovery path if reasonable:
The only possible case where BUG_ON can validly be used is "I have
some fundamental data corruption and cannot possibly return an
error". [2]
As a very good approximation is the general rule:
"absolutely no new BUG_ON() calls _ever_" [2]
... not even if something really shouldn't ever happen and is merely for
documenting that an invariant always has to hold. However, there are sill
exceptions where BUG_ON() may be used:
If you have a "this is major internal corruption, there's no way we can
continue", then BUG_ON() is appropriate. [3]
There is only one good BUG_ON():
Now, that said, there is one very valid sub-form of BUG_ON():
BUILD_BUG_ON() is absolutely 100% fine. [2]
While WARN will also crash the machine with panic_on_warn set, that's
exactly to be expected:
So we have two very different cases: the "virtual machine with good
logging where a dead machine is fine" - use 'panic_on_warn'. And
the actual real hardware with real drivers, running real loads by
users. [4]
The basic idea is that warnings will similarly get reported by users
and be found during testing. However, in contrast to a BUG(), there is a
way to actually influence the expected behavior (e.g., panic_on_warn)
and to eventually keep the machine alive to extract some debug info.
Ingo notes that not all WARN_ON_ONCE cases need recovery. If we don't ever
expect this code to trigger in any case, recovery code is not really
helpful.
I'd prefer to keep all these warnings 'simple' - i.e. no attempted
recovery & control flow, unless we ever expect these to trigger.
[5]
There have been different rules floating around that were never properly
documented. Let's try to clarify.
[1] https://lkml.kernel.org/r/CAHk-=wiEAH+ojSpAgx_Ep=NKPWHU8AdO3V56BXcCsU97oYJ1EA@mail.gmail.com
[2] https://lore.kernel.org/r/CAHk-=wg40EAZofO16Eviaj7mfqDhZ2gVEbvfsMf6gYzspRjYvw@mail.gmail.com
[3] https://lkml.kernel.org/r/CAHk-=wit-DmhMfQErY29JSPjFgebx_Ld+pnerc4J2Ag990WwAA@mail.gmail.com
[4] https://lore.kernel.org/r/CAHk-=wgF7K2gSSpy=m_=K3Nov4zaceUX9puQf1TjkTJLA2XC_g@mail.gmail.com
[5] https://lore.kernel.org/r/YwIW+mVeZoTOxn%2F4@gmail.com
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20220923113426.52871-2-david@redhat.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Since commit b3ac04132c ("mm/rmap: Turn page_referenced() into
folio_referenced()") the page_referenced function name was modified,
so fix it up to use the correct one.
Signed-off-by: Vernon Yang <vernon2gm@gmail.com>
Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
Link: https://lore.kernel.org/r/20220926152032.74621-1-vernon2gm@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
The Code of Conduct interpretation does not reflect the current
practices of the CoC committee or the TAB. Update the documentation
to remove references to initial committees and boot strap periods
since it is past that time, and note that the this document
does serve as the documentation for the CoC committee processes.
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20220926211149.2278214-1-kristen@linux.intel.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Now that building html docs with math expressions does not need texlive
packages, remove the note on the requirement in the "Sphinx Install"
section.
Instead, add sections of "Math Expressions in HTML" and "Choice of Math
Renderer".
Describe the effect of setting SPHINX_IMGMATH in the latter section.
Signed-off-by: Akira Yokosawa <akiyks@gmail.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/a67e3279-6bc7-ee2c-2b49-9275252460b0@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Bring the description on when to use the Reported-by: tag found in
Documentation/process/5.Posting.rst more in line with the description in
Documentation/process/submitting-patches.rst: before this change the two
were contradicting each other, as the latter is way more permissive and
only states '[...] if the bug was reported in private, then ask for
permission first before using the Reported-by tag.'
Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info>
Link: https://lore.kernel.org/r/2fc7162dfb76e04da5ea903c9c170d913e735dad.1664372256.git.linux@leemhuis.info
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
After commit 22471e1313 ("kconfig: use a menu in arch/Kconfig to reduce
clutter"), the location of Kprobes is under "General architecture-dependent
options" rather than "General setup".
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Fixes: 22471e1313 ("kconfig: use a menu in arch/Kconfig to reduce clutter")
Link: https://lore.kernel.org/r/1663322106-12178-1-git-send-email-yangtiezhu@loongson.cn
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
