Commit Graph

1153508 Commits

Author SHA1 Message Date
Michael Ellerman
07b050f929 powerpc/vmlinux.lds: Don't discard .rela* for relocatable builds
Relocatable kernels must not discard relocations, they need to be
processed at runtime. As such they are included for CONFIG_RELOCATABLE
builds in the powerpc linker script (line 340).

However they are also unconditionally discarded later in the
script (line 414). Previously that worked because the earlier inclusion
superseded the discard.

However commit 99cb0d917f ("arch: fix broken BuildID for arm64 and
riscv") introduced an earlier use of DISCARD as part of the RO_DATA
macro (line 137). With binutils < 2.36 that causes the DISCARD
directives later in the script to be applied earlier, causing .rela* to
actually be discarded at link time, leading to build warnings and a
kernel that doesn't boot:

  ld: warning: discarding dynamic section .rela.init.rodata

Fix it by conditionally discarding .rela* only when CONFIG_RELOCATABLE
is disabled.

Fixes: 99cb0d917f ("arch: fix broken BuildID for arm64 and riscv")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

Link: https://lore.kernel.org/r/20230105132349.384666-2-mpe@ellerman.id.au
2023-01-06 00:25:01 +11:00
Michael Ellerman
4b9880dbf3 powerpc/vmlinux.lds: Define RUNTIME_DISCARD_EXIT
The powerpc linker script explicitly includes .exit.text, because
otherwise the link fails due to references from __bug_table and
__ex_table. The code is freed (discarded) at runtime along with
.init.text and data.

That has worked in the past despite powerpc not defining
RUNTIME_DISCARD_EXIT because DISCARDS appears late in the powerpc linker
script (line 410), and the explicit inclusion of .exit.text
earlier (line 280) supersedes the discard.

However commit 99cb0d917f ("arch: fix broken BuildID for arm64 and
riscv") introduced an earlier use of DISCARD as part of the RO_DATA
macro (line 136). With binutils < 2.36 that causes the DISCARD
directives later in the script to be applied earlier [1], causing
.exit.text to actually be discarded at link time, leading to build
errors:

  '.exit.text' referenced in section '__bug_table' of crypto/algboss.o: defined in
  discarded section '.exit.text' of crypto/algboss.o
  '.exit.text' referenced in section '__ex_table' of drivers/nvdimm/core.o: defined in
  discarded section '.exit.text' of drivers/nvdimm/core.o

Fix it by defining RUNTIME_DISCARD_EXIT, which causes the generic
DISCARDS macro to not include .exit.text at all.

1: https://lore.kernel.org/lkml/87fscp2v7k.fsf@igel.home/

Fixes: 99cb0d917f ("arch: fix broken BuildID for arm64 and riscv")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230105132349.384666-1-mpe@ellerman.id.au
2023-01-06 00:24:50 +11:00
Linus Torvalds
88603b6dc4 Linux 6.2-rc2 2023-01-01 13:53:16 -08:00
Linus Torvalds
150aae354b - Pass only an initialized perf event attribute to the LSM hook
- Fix a use-after-free on the perf syscall's error path
 
 - A potential integer overflow fix in amd_core_pmu_init()
 
 - Fix the cgroup events tracking after the context handling rewrite
 
 - Return the proper value from the inherit_event() function on error
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Merge tag 'perf_urgent_for_v6.2_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Borislav Petkov:

 - Pass only an initialized perf event attribute to the LSM hook

 - Fix a use-after-free on the perf syscall's error path

 - A potential integer overflow fix in amd_core_pmu_init()

 - Fix the cgroup events tracking after the context handling rewrite

 - Return the proper value from the inherit_event() function on error

* tag 'perf_urgent_for_v6.2_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/core: Call LSM hook after copying perf_event_attr
  perf: Fix use-after-free in error path
  perf/x86/amd: fix potential integer overflow on shift of a int
  perf/core: Fix cgroup events tracking
  perf core: Return error pointer if inherit_event() fails to find pmu_ctx
2023-01-01 11:27:00 -08:00
Linus Torvalds
5b129817ae - Two fixes to correct how kprobes handles INT3 now that they're added by other
functionality like the rethunks and not only kgdb
 
 - Remove __init section markings of two functions which are referenced by a
   function in the .text section
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Merge tag 'x86_urgent_for_v6.2_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 fixes from Borislav Petkov:

 - Two fixes to correct how kprobes handles INT3 now that they're added
   by other functionality like the rethunks and not only kgdb

 - Remove __init section markings of two functions which are referenced
   by a function in the .text section

* tag 'x86_urgent_for_v6.2_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/kprobes: Fix optprobe optimization check with CONFIG_RETHUNK
  x86/kprobes: Fix kprobes instruction boudary check with CONFIG_RETHUNK
  x86/calldepth: Fix incorrect init section references
2023-01-01 11:19:50 -08:00
Linus Torvalds
95d248d16f - Prevent the leaking of a debug timer in futex_waitv()
- A preempt-RT mutex locking fix, adding the proper acquire semantics
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Merge tag 'locking_urgent_for_v6.2_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking fixes from Borislav Petkov:

 - Prevent the leaking of a debug timer in futex_waitv()

 - A preempt-RT mutex locking fix, adding the proper acquire semantics

* tag 'locking_urgent_for_v6.2_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  futex: Fix futex_waitv() hrtimer debug object leak on kcalloc error
  rtmutex: Add acquire semantics for rtmutex lock acquisition slow path
2023-01-01 11:15:05 -08:00
Linus Torvalds
8b41948296 drm-fixes for 6.2-rc2
- i915 fixes for newer platforms
 - i915 locking rework to not give up in vm eviction fallback path too
   early
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Merge tag 'drm-fixes-2023-01-01' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Daniel Vetter:
 "I'm just back from the mountains, and Dave is out at the beach and
  should be back in a week again. Just i915 fixes and since Rodrigo
  bothered to make the pull last week I figured I should warm up gpg and
  forward this in a nice signed tag as a new years present!

   - i915 fixes for newer platforms

   - i915 locking rework to not give up in vm eviction fallback path too
     early"

* tag 'drm-fixes-2023-01-01' of git://anongit.freedesktop.org/drm/drm:
  drm/i915/dsi: fix MIPI_BKLT_EN_1 native GPIO index
  drm/i915/dsi: add support for ICL+ native MIPI GPIO sequence
  drm/i915/uc: Fix two issues with over-size firmware files
  drm/i915: improve the catch-all evict to handle lock contention
  drm/i915: Remove __maybe_unused from mtl_info
  drm/i915: fix TLB invalidation for Gen12.50 video and compute engines
2023-01-01 11:11:13 -08:00
Daniel Vetter
a9f5a752e8 - fix TLB invalidation for DG2 and newer platforms. (Andrzej)
- Remove __maybe_unused from mtl_info (Lucas)
 - improve the catch-all evict to handle lock contention (Matt Auld)
 - Fix two issues with over-size (GuC/HuC) firmware files (John)
 - Fix DSI resume issues on ICL+ (Jani)
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Merge tag 'drm-intel-fixes-2022-12-30' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- fix TLB invalidation for DG2 and newer platforms. (Andrzej)
- Remove __maybe_unused from mtl_info (Lucas)
- improve the catch-all evict to handle lock contention (Matt Auld)
- Fix two issues with over-size (GuC/HuC) firmware files (John)
- Fix DSI resume issues on ICL+ (Jani)

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/Y662ijDHrZCjTFla@intel.com
2023-01-01 11:52:11 +01:00
Linus Torvalds
e4cf7c25ba Kbuild fixes for v6.2
- Fix broken BuildID
 
  - Add srcrpm-pkg to the help message
 
  - Fix the option order for modpost built with musl libc
 
  - Fix the build dependency of rpm-pkg for openSUSE
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Merge tag 'kbuild-fixes-v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - Fix broken BuildID

 - Add srcrpm-pkg to the help message

 - Fix the option order for modpost built with musl libc

 - Fix the build dependency of rpm-pkg for openSUSE

* tag 'kbuild-fixes-v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  fixdep: remove unneeded <stdarg.h> inclusion
  kbuild: sort single-targets alphabetically again
  kbuild: rpm-pkg: add libelf-devel as alternative for BuildRequires
  kbuild: Fix running modpost with musl libc
  kbuild: add a missing line for help message
  .gitignore: ignore *.rpm
  arch: fix broken BuildID for arm64 and riscv
  kconfig: Add static text for search information in help menu
2022-12-31 10:21:47 -08:00
Linus Torvalds
e39d9b9f89 ATA fixes for 6.2-rc2
A single fix to address an issue with wake from suspend with PCS
 adapters, from Adam.
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Merge tag 'ata-6.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata

Pull ata fix from Damien Le Moal:
 "A single fix to address an issue with wake from suspend with PCS
  adapters, from Adam"

* tag 'ata-6.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata:
  ata: ahci: Fix PCS quirk application for suspend
2022-12-31 10:01:44 -08:00
Linus Torvalds
c8451c141e ACPI fixes for 6.2-rc2
- Add ACPI IRQ override quirks for Asus ExpertBook B2502, Lenovo
    14ALC7, and XMG Core 15 (Hans de Goede, Adrian Freund,  Erik
    Schumacher).
 
  - Adjust ACPI video detection fallback path to prevent non-operational
    ACPI backlight devices from being created on systems where the native
    driver does not detect a suitable panel (Mario Limonciello).
 
  - Fix Apple GMUX backlight detection (Hans de Goede).
 
  - Add a low-power S0 idle (S0ix) handling quirk for HP Elitebook 865
    and stop using AMD-specific low-power S0 idle code path for systems
    with Rembrandt chips and newer (Mario Limonciello).
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Merge tag 'acpi-6.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI fixes from Rafael Wysocki:
 "These are new ACPI IRQ override quirks, low-power S0 idle (S0ix)
  support adjustments and ACPI backlight handling fixes, mostly for
  platforms using AMD chips.

  Specifics:

   - Add ACPI IRQ override quirks for Asus ExpertBook B2502, Lenovo
     14ALC7, and XMG Core 15 (Hans de Goede, Adrian Freund, Erik
     Schumacher).

   - Adjust ACPI video detection fallback path to prevent
     non-operational ACPI backlight devices from being created on
     systems where the native driver does not detect a suitable panel
     (Mario Limonciello).

   - Fix Apple GMUX backlight detection (Hans de Goede).

   - Add a low-power S0 idle (S0ix) handling quirk for HP Elitebook 865
     and stop using AMD-specific low-power S0 idle code path for systems
     with Rembrandt chips and newer (Mario Limonciello)"

* tag 'acpi-6.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: x86: s2idle: Stop using AMD specific codepath for Rembrandt+
  ACPI: x86: s2idle: Force AMD GUID/_REV 2 on HP Elitebook 865
  ACPI: video: Fix Apple GMUX backlight detection
  ACPI: resource: Add Asus ExpertBook B2502 to Asus quirks
  ACPI: resource: do IRQ override on Lenovo 14ALC7
  ACPI: resource: do IRQ override on XMG Core 15
  ACPI: video: Don't enable fallback path for creating ACPI backlight by default
  drm/amd/display: Report to ACPI video if no panels were found
  ACPI: video: Allow GPU drivers to report no panels
2022-12-30 10:47:25 -08:00
Linus Torvalds
262eef26e3 sound fixes for 6.2-rc2
Just a few small fixes:
 - A regression fix for HDMI audio on HD-audio AMD codecs
 - Fixes for LINE6 MIDI handling
 - HD-audio quirk for Dell laptops
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Merge tag 'sound-6.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Just a few small fixes:

   - A regression fix for HDMI audio on HD-audio AMD codecs

   - Fixes for LINE6 MIDI handling

   - HD-audio quirk for Dell laptops"

* tag 'sound-6.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda/hdmi: Static PCM mapping again with AMD HDMI codecs
  ALSA: hda/realtek: Apply dual codec fixup for Dell Latitude laptops
  ALSA: line6: fix stack overflow in line6_midi_transmit
  ALSA: line6: correct midi status byte when receiving data from podxt
2022-12-30 10:30:54 -08:00
Rafael J. Wysocki
0948a9ef1d Merge branches 'acpi-resource' and 'acpi-video'
Merge ACPI resource handling quirks and ACPI backlight handling fixes
for 6.2-rc2:

 - Add ACPI IRQ override quirks for Asus ExpertBook B2502, Lenovo
   14ALC7, and XMG Core 15 (Hans de Goede, Adrian Freund,  Erik
   Schumacher).

 - Adjust ACPI video detection fallback path to prevent non-operational
   ACPI backlight devices from being created on systems where the native
   driver does not detect a suitable panel (Mario Limonciello).

 - Fix Apple GMUX backlight detection (Hans de Goede).

* acpi-resource:
  ACPI: resource: Add Asus ExpertBook B2502 to Asus quirks
  ACPI: resource: do IRQ override on Lenovo 14ALC7
  ACPI: resource: do IRQ override on XMG Core 15

* acpi-video:
  ACPI: video: Fix Apple GMUX backlight detection
  ACPI: video: Don't enable fallback path for creating ACPI backlight by default
  drm/amd/display: Report to ACPI video if no panels were found
  ACPI: video: Allow GPU drivers to report no panels
2022-12-30 16:59:10 +01:00
Jani Nikula
6217e9f05a drm/i915/dsi: fix MIPI_BKLT_EN_1 native GPIO index
Due to copy-paste fail, MIPI_BKLT_EN_1 would always use PPS index 1,
never 0. Fix the sloppiest commit in recent memory.

Fixes: 963bbdb32b ("drm/i915/dsi: add support for ICL+ native MIPI GPIO sequence")
Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221220140105.313333-1-jani.nikula@intel.com
(cherry picked from commit a561933c57)
Cc: stable@vger.kernel.org # 6.1
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2022-12-30 04:28:46 -05:00
Jani Nikula
963bbdb32b drm/i915/dsi: add support for ICL+ native MIPI GPIO sequence
Starting from ICL, the default for MIPI GPIO sequences seems to be using
native GPIOs i.e. GPIOs available in the GPU. These native GPIOs reuse
many pins that quite frankly seem scary to poke based on the VBT
sequences. We pretty much have to trust that the board is configured
such that the relevant HPD, PP_CONTROL and GPIO bits aren't used for
anything else.

MIPI sequence v4 also adds a flag to fall back to non-native sequences.

v5:
- Wrap SHOTPLUG_CTL_DDI modification in spin_lock() in icp_irq_handler()
  too (Ville)
- References instead of Closes issue 6131 because this does not fix everything

v4:
- Wrap SHOTPLUG_CTL_DDI modification in spin_lock_irq() (Ville)

v3:
- Fix -Wbitwise-conditional-parentheses (kernel test robot <lkp@intel.com>)

v2:
- Fix HPD pin output set (impacts GPIOs 0 and 5)
- Fix GPIO data output direction set (impacts GPIOs 4 and 9)
- Reduce register accesses to single intel_de_rwm()

References: https://gitlab.freedesktop.org/drm/intel/-/issues/6131
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221219105955.4014451-1-jani.nikula@intel.com
(cherry picked from commit f087cfe6fc)
Cc: stable@vger.kernel.org # 6.1
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2022-12-30 04:27:04 -05:00
Masahiro Yamada
6a5e25fc3e fixdep: remove unneeded <stdarg.h> inclusion
This is unneeded since commit 69304379ff ("fixdep: use fflush() and
ferror() to ensure successful write to files").

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-12-30 17:26:19 +09:00
Masahiro Yamada
aa4847dbcd kbuild: sort single-targets alphabetically again
This was previously alphabetically sorted. Sort it again.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
2022-12-30 17:24:59 +09:00
Masahiro Yamada
02a893bc99 kbuild: rpm-pkg: add libelf-devel as alternative for BuildRequires
Guoqing Jiang reports that openSUSE cannot compile the kernel rpm due
to "BuildRequires: elfutils-libelf-devel" added by commit 8818039f95
("kbuild: add ability to make source rpm buildable using koji").
The relevant package name in openSUSE is libelf-devel.

Add it as an alternative package.

BTW, if it is impossible to solve the build requirement, the final
resort would be:

    $ make RPMOPTS=--nodeps rpm-pkg

This passes --nodeps to the rpmbuild command so it will not verify
build dependencies. This is useful to test rpm builds on non-rpm
system. On Debian/Ubuntu, for example, you can install rpmbuild by
'apt-get install rpm'.

NOTE1:
  Likewise, it is possible to bypass the build dependency check for
  debian package builds:

    $ make DPKG_FLAGS=-d deb-pkg

NOTE2:
  The 'or' operator is supported since RPM 4.13. So, old distros such
  as CentOS 7 will break. I suggest installing newer rpmbuild in such
  cases.

Link: https://lore.kernel.org/linux-kbuild/ee227d24-9c94-bfa3-166a-4ee6b5dfea09@linux.dev/T/#u
Fixes: 8818039f95 ("kbuild: add ability to make source rpm buildable using koji")
Reported-by: Guoqing Jiang <guoqing.jiang@linux.dev>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Guoqing Jiang <guoqing.jiang@linux.dev>
Acked-by: Jonathan Toppins <jtoppins@redhat.com>
2022-12-30 17:24:49 +09:00
Samuel Holland
63ffe00d8c kbuild: Fix running modpost with musl libc
commit 3d57e1b7b1 ("kbuild: refactor the prerequisites of the modpost
rule") moved 'vmlinux.o' inside modpost-args, possibly before some of
the other options. However, getopt() in musl libc follows POSIX and
stops looking for options upon reaching the first non-option argument.
As a result, the '-T' option is misinterpreted as a positional argument,
and the build fails:

  make -f ./scripts/Makefile.modpost
     scripts/mod/modpost   -E   -o Module.symvers vmlinux.o -T modules.order
  -T: No such file or directory
  make[1]: *** [scripts/Makefile.modpost:137: Module.symvers] Error 1
  make: *** [Makefile:1960: modpost] Error 2

The fix is to move all options before 'vmlinux.o' in modpost-args.

Fixes: 3d57e1b7b1 ("kbuild: refactor the prerequisites of the modpost rule")
Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-12-30 17:22:14 +09:00
Jun ASAKA
9c9b55a594 kbuild: add a missing line for help message
The help message line for building the source RPM package was missing.
Added it.

Signed-off-by: Jun ASAKA <JunASAKA@zzy040330.moe>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-12-30 17:22:14 +09:00
Masahiro Yamada
924d28b39e .gitignore: ignore *.rpm
Previously, *.rpm files were created under $HOME/rpmbuild/, but since
commit 8818039f95 ("kbuild: add ability to make source rpm buildable
using koji"), srcrpm-pkg creates the source rpm in the kernel tree
because it sets '_srcrpmdir'.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-12-30 17:22:14 +09:00
Masahiro Yamada
99cb0d917f arch: fix broken BuildID for arm64 and riscv
Dennis Gilmore reports that the BuildID is missing in the arm64 vmlinux
since commit 994b7ac169 ("arm64: remove special treatment for the
link order of head.o").

The issue is that the type of .notes section, which contains the BuildID,
changed from NOTES to PROGBITS.

Ard Biesheuvel figured out that whichever object gets linked first gets
to decide the type of a section. The PROGBITS type is the result of the
compiler emitting .note.GNU-stack as PROGBITS rather than NOTE.

While Ard provided a fix for arm64, I want to fix this globally because
the same issue is happening on riscv since commit 2348e6bf44 ("riscv:
remove special treatment for the link order of head.o"). This problem
will happen in general for other architectures if they start to drop
unneeded entries from scripts/head-object-list.txt.

Discard .note.GNU-stack in include/asm-generic/vmlinux.lds.h.

Link: https://lore.kernel.org/lkml/CAABkxwuQoz1CTbyb57n0ZX65eSYiTonFCU8-LCQc=74D=xE=rA@mail.gmail.com/
Fixes: 994b7ac169 ("arm64: remove special treatment for the link order of head.o")
Fixes: 2348e6bf44 ("riscv: remove special treatment for the link order of head.o")
Reported-by: Dennis Gilmore <dennis@ausil.us>
Suggested-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
2022-12-30 17:21:51 +09:00
John Harrison
11ce8fd8fd drm/i915/uc: Fix two issues with over-size firmware files
In the case where a firmware file is too large (e.g. someone
downloaded a web page ASCII dump from github...), the firmware object
is released but the pointer is not zerod. If no other firmware file
was found then release would be called again leading to a double kfree.

Also, the size check was only being applied to the initial firmware
load not any of the subsequent attempts. So move the check into a
wrapper that is used for all loads.

Fixes: 016241168d ("drm/i915/uc: use different ggtt pin offsets for uc loads")
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Alan Previn <alan.previn.teres.alexis@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: "Thomas Hellström" <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221221193031.687266-4-John.C.Harrison@Intel.com
(cherry picked from commit 4071d98b29)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2022-12-30 03:04:45 -05:00
Matthew Auld
3f882f2d4f drm/i915: improve the catch-all evict to handle lock contention
The catch-all evict can fail due to object lock contention, since it
only goes as far as trylocking the object, due to us already holding the
vm->mutex. Doing a full object lock here can deadlock, since the
vm->mutex is always our inner lock. Add another execbuf pass which drops
the vm->mutex and then tries to grab the object will the full lock,
before then retrying the eviction. This should be good enough for now to
fix the immediate regression with userspace seeing -ENOSPC from execbuf
due to contended object locks during GTT eviction.

v2 (Mani)
  - Also revamp the docs for the different passes.

Testcase: igt@gem_ppgtt@shrink-vs-evict-*
Fixes: 7e00897be8 ("drm/i915: Add object locking to i915_gem_evict_for_node and i915_gem_evict_something, v2.")
References: https://gitlab.freedesktop.org/drm/intel/-/issues/7627
References: https://gitlab.freedesktop.org/drm/intel/-/issues/7570
References: https://bugzilla.mozilla.org/show_bug.cgi?id=1779558
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Mani Milani <mani@chromium.org>
Cc: <stable@vger.kernel.org> # v5.18+
Reviewed-by: Mani Milani <mani@chromium.org>
Tested-by: Mani Milani <mani@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20221216113456.414183-1-matthew.auld@intel.com
(cherry picked from commit 801fa7a81f)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2022-12-30 03:04:39 -05:00
Lucas De Marchi
fff7586988 drm/i915: Remove __maybe_unused from mtl_info
The attribute __maybe_unused should remain only until the respective
info is not in the pciidlist. The info can't be added together
with its definition because that would cause the driver to automatically
probe for the device, while it's still not ready for that. However once
pciidlist contains it, the attribute can be removed.

Fixes: 7835303982 ("drm/i915/mtl: Add MeteorLake PCI IDs")
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221214194944.3670344-1-lucas.demarchi@intel.com
(cherry picked from commit 50490ce05b)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2022-12-30 03:04:36 -05:00
Andrzej Hajda
c5bc073668 drm/i915: fix TLB invalidation for Gen12.50 video and compute engines
In case of Gen12.50 video and compute engines, TLB_INV registers are
masked - to modify one bit, corresponding bit in upper half of the register
must be enabled, otherwise nothing happens.

Fixes: 77fa9efc16 ("drm/i915/xehp: Create separate reg definitions for new MCR registers")
Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221214075439.402485-1-andrzej.hajda@intel.com
(cherry picked from commit 4d5cf7b168)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2022-12-30 03:04:32 -05:00
Linus Torvalds
bff687b3da block-6.2-2022-12-29
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Merge tag 'block-6.2-2022-12-29' of git://git.kernel.dk/linux

Pull block fixes from Jens Axboe:
 "Mostly just NVMe, but also a single fixup for BFQ for a regression
  that happened during the merge window. In detail:

   - NVMe pull requests via Christoph:
      - Fix doorbell buffer value endianness (Klaus Jensen)
      - Fix Linux vs NVMe page size mismatch (Keith Busch)
      - Fix a potential use memory access beyong the allocation limit
        (Keith Busch)
      - Fix a multipath vs blktrace NULL pointer dereference (Yanjun
        Zhang)
      - Fix various problems in handling the Command Supported and
        Effects log (Christoph Hellwig)
      - Don't allow unprivileged passthrough of commands that don't
        transfer data but modify logical block content (Christoph
        Hellwig)
      - Add a features and quirks policy document (Christoph Hellwig)
      - Fix some really nasty code that was correct but made smatch
        complain (Sagi Grimberg)

   - Use-after-free regression in BFQ from this merge window (Yu)"

* tag 'block-6.2-2022-12-29' of git://git.kernel.dk/linux:
  nvme-auth: fix smatch warning complaints
  nvme: consult the CSE log page for unprivileged passthrough
  nvme: also return I/O command effects from nvme_command_effects
  nvmet: don't defer passthrough commands with trivial effects to the workqueue
  nvmet: set the LBCC bit for commands that modify data
  nvmet: use NVME_CMD_EFFECTS_CSUPP instead of open coding it
  nvme: fix the NVME_CMD_EFFECTS_CSE_MASK definition
  docs, nvme: add a feature and quirk policy document
  nvme-pci: update sqsize when adjusting the queue depth
  nvme: fix setting the queue depth in nvme_alloc_io_tag_set
  block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq
  nvme: fix multipath crash caused by flush request when blktrace is enabled
  nvme-pci: fix page size checks
  nvme-pci: fix mempool alloc size
  nvme-pci: fix doorbell buffer value endianness
2022-12-29 16:57:29 -08:00
Linus Torvalds
ac787ffa5a io_uring-6.2-2022-12-29
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Merge tag 'io_uring-6.2-2022-12-29' of git://git.kernel.dk/linux

Pull io_uring fixes from Jens Axboe:

 - Two fixes for mutex grabbing when the task state is != TASK_RUNNING
   (me)

 - Check for invalid opcode in io_uring_register() a bit earlier, to
   avoid going through the quiesce machinery just to return -EINVAL
   later in the process (me)

 - Fix for the uapi io_uring header, skipping including time_types.h
   when necessary (Stefan)

* tag 'io_uring-6.2-2022-12-29' of git://git.kernel.dk/linux:
  uapi:io_uring.h: allow linux/time_types.h to be skipped
  io_uring: check for valid register opcode earlier
  io_uring/cancel: re-grab ctx mutex after finishing wait
  io_uring: finish waiting before flushing overflow entries
2022-12-29 16:48:21 -08:00
Linus Torvalds
69fb073b5b linux-kselftest-kunit-fixes-6.2-rc2
This KUnit update for Linux 6.2-rc2 consists of:
 
 - alloc_string_stream_fragment() error path fix to free before
   returning a failure.
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Merge tag 'linux-kselftest-kunit-fixes-6.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull KUnit fix from Shuah Khan:

 - alloc_string_stream_fragment() error path fix to free before
   returning a failure.

* tag 'linux-kselftest-kunit-fixes-6.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  kunit: alloc_string_stream_fragment error handling bug fix
2022-12-29 16:43:25 -08:00
Linus Torvalds
2258c2dc85 Changes that were posted too late for 6.1, or after the release.
x86:
 
 * several fixes to nested VMX execution controls
 
 * fixes and clarification to the documentation for Xen emulation
 
 * do not unnecessarily release a pmu event with zero period
 
 * MMU fixes
 
 * fix Coverity warning in kvm_hv_flush_tlb()
 
 selftests:
 
 * fixes for the ucall mechanism in selftests
 
 * other fixes mostly related to compilation with clang
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "Changes that were posted too late for 6.1, or after the release.

  x86:

   - several fixes to nested VMX execution controls

   - fixes and clarification to the documentation for Xen emulation

   - do not unnecessarily release a pmu event with zero period

   - MMU fixes

   - fix Coverity warning in kvm_hv_flush_tlb()

  selftests:

   - fixes for the ucall mechanism in selftests

   - other fixes mostly related to compilation with clang"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (41 commits)
  KVM: selftests: restore special vmmcall code layout needed by the harness
  Documentation: kvm: clarify SRCU locking order
  KVM: x86: fix deadlock for KVM_XEN_EVTCHN_RESET
  KVM: x86/xen: Documentation updates and clarifications
  KVM: x86/xen: Add KVM_XEN_INVALID_GPA and KVM_XEN_INVALID_GFN to uapi
  KVM: x86/xen: Simplify eventfd IOCTLs
  KVM: x86/xen: Fix SRCU/RCU usage in readers of evtchn_ports
  KVM: x86/xen: Use kvm_read_guest_virt() instead of open-coding it badly
  KVM: x86/xen: Fix memory leak in kvm_xen_write_hypercall_page()
  KVM: Delete extra block of "};" in the KVM API documentation
  kvm: x86/mmu: Remove duplicated "be split" in spte.h
  kvm: Remove the unused macro KVM_MMU_READ_{,UN}LOCK()
  MAINTAINERS: adjust entry after renaming the vmx hyperv files
  KVM: selftests: Mark correct page as mapped in virt_map()
  KVM: arm64: selftests: Don't identity map the ucall MMIO hole
  KVM: selftests: document the default implementation of vm_vaddr_populate_bitmap
  KVM: selftests: Use magic value to signal ucall_alloc() failure
  KVM: selftests: Disable "gnu-variable-sized-type-not-at-end" warning
  KVM: selftests: Include lib.mk before consuming $(CC)
  KVM: selftests: Explicitly disable builtins for mem*() overrides
  ...
2022-12-29 10:56:13 -08:00
Jens Axboe
1551ed5a17 nvme fixes for Linux 6.2
- fix various problems in handling the Command Supported and Effects log
    (Christoph Hellwig)
  - don't allow unprivileged passthrough of commands that don't transfer
    data but modify logical block content (Christoph Hellwig)
  - add a features and quirks policy document (Christoph Hellwig)
  - fix some really nasty code that was correct but made smatch complain
    (Sagi Grimberg)
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Merge tag 'nvme-6.2-2022-12-29' of git://git.infradead.org/nvme into block-6.2

Pull NVMe fixes from Christoph:

"nvme fixes for Linux 6.2

 - fix various problems in handling the Command Supported and Effects log
   (Christoph Hellwig)
 - don't allow unprivileged passthrough of commands that don't transfer
   data but modify logical block content (Christoph Hellwig)
 - add a features and quirks policy document (Christoph Hellwig)
 - fix some really nasty code that was correct but made smatch complain
   (Sagi Grimberg)"

* tag 'nvme-6.2-2022-12-29' of git://git.infradead.org/nvme:
  nvme-auth: fix smatch warning complaints
  nvme: consult the CSE log page for unprivileged passthrough
  nvme: also return I/O command effects from nvme_command_effects
  nvmet: don't defer passthrough commands with trivial effects to the workqueue
  nvmet: set the LBCC bit for commands that modify data
  nvmet: use NVME_CMD_EFFECTS_CSUPP instead of open coding it
  nvme: fix the NVME_CMD_EFFECTS_CSE_MASK definition
  docs, nvme: add a feature and quirk policy document
2022-12-29 11:31:45 -07:00
Bhaskar Chowdhury
da8daff940 kconfig: Add static text for search information in help menu
Add few static text to explain how one can bring up the search dialog
box by pressing the forward slash key anywhere on this interface.

Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-12-29 12:00:07 +09:00
Sagi Grimberg
76807fcd73 nvme-auth: fix smatch warning complaints
When initializing auth context, there may be no secrets passed
by the user. Make return code explicit when returning successfully.

smatch warnings:
drivers/nvme/host/auth.c:950 nvme_auth_init_ctrl() warn: missing error code? 'ret'

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2022-12-28 06:26:35 -10:00
Christoph Hellwig
6f99ac04c4 nvme: consult the CSE log page for unprivileged passthrough
Commands like Write Zeros can change the contents of a namespaces without
actually transferring data.  To protect against this, check the Commands
Supported and Effects log is supported by the controller for any
unprivileg command passthrough and refuse unprivileged passthrough if the
command has any effects that can change data or metadata.

Note: While the Commands Support and Effects log page has only been
mandatory since NVMe 2.0, it is widely supported because Windows requires
it for any command passthrough from userspace.

Fixes: e4fbcf32c8 ("nvme: identify-namespace without CAP_SYS_ADMIN")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
2022-12-28 06:26:31 -10:00
Christoph Hellwig
831ed60c2a nvme: also return I/O command effects from nvme_command_effects
To be able to use the Commands Supported and Effects Log for allowing
unprivileged passtrough, it needs to be corretly reported for I/O
commands as well.  Return the I/O command effects from
nvme_command_effects, and also add a default list of effects for the
NVM command set.  For other command sets, the Commands Supported and
Effects log is required to be present already.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
2022-12-28 06:26:25 -10:00
Christoph Hellwig
2a459f6933 nvmet: don't defer passthrough commands with trivial effects to the workqueue
Mask out the "Command Supported" and "Logical Block Content Change" bits
and only defer execution of commands that have non-trivial effects to
the workqueue for synchronous execution.  This allows to execute admin
commands asynchronously on controllers that provide a Command Supported
and Effects log page, and will keep allowing to execute Write commands
asynchronously once command effects on I/O commands are taken into
account.

Fixes: c1fef73f79 ("nvmet: add passthru code to process commands")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
2022-12-28 06:26:18 -10:00
Christoph Hellwig
f2d1421391 nvmet: set the LBCC bit for commands that modify data
Write, Write Zeroes, Zone append and a Zone Reset through
Zone Management Send modify the logical block content of a namespace,
so make sure the LBCC bit is reported for them.

Fixes: b5d0b38c0475 ("nvmet: add Command Set Identifier support")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
2022-12-28 06:26:13 -10:00
Christoph Hellwig
61f37154c5 nvmet: use NVME_CMD_EFFECTS_CSUPP instead of open coding it
Use NVME_CMD_EFFECTS_CSUPP instead of open coding it and assign a
single value to multiple array entries instead of repeated assignments.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
2022-12-28 06:26:08 -10:00
Christoph Hellwig
685e631163 nvme: fix the NVME_CMD_EFFECTS_CSE_MASK definition
3 << 16 does not generate the correct mask for bits 16, 17 and 18.
Use the GENMASK macro to generate the correct mask instead.

Fixes: 84fef62d13 ("nvme: check admin passthru command effects")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
2022-12-28 06:25:55 -10:00
Christoph Hellwig
8ca4fc323d docs, nvme: add a feature and quirk policy document
This adds a document about what specification features are supported by
the Linux NVMe driver, and what qualifies for a quirk if an implementation
has problems following the specification.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Jonathan Corbet <corbet@lwn.net>
2022-12-28 05:37:12 -10:00
Takashi Iwai
090ddad4c7 ALSA: hda/hdmi: Static PCM mapping again with AMD HDMI codecs
The recent code refactoring for HD-audio HDMI codec driver caused a
regression on AMD/ATI HDMI codecs; namely, PulseAudioand pipewire
don't recognize HDMI outputs any longer while the direct output via
ALSA raw access still works.

The problem turned out that, after the code refactoring, the driver
assumes only the dynamic PCM assignment, and when a PCM stream that
still isn't assigned to any pin gets opened, the driver tries to
assign any free converter to the PCM stream.  This behavior is OK for
Intel and other codecs, as they have arbitrary connections between
pins and converters.  OTOH, on AMD chips that have a 1:1 mapping
between pins and converters, this may end up with blocking the open of
the next PCM stream for the pin that is tied with the formerly taken
converter.

Also, with the code refactoring, more PCM streams are exposed than
necessary as we assume all converters can be used, while this isn't
true for AMD case.  This may change the PCM stream assignment and
confuse users as well.

This patch fixes those problems by:

- Introducing a flag spec->static_pcm_mapping, and if it's set, the
  driver applies the static mapping between pins and converters at the
  probe time
- Limiting the number of PCM streams per pins, too; this avoids the
  superfluous PCM streams

Fixes: ef6f5494fa ("ALSA: hda/hdmi: Use only dynamic PCM device allocation")
Cc: <stable@vger.kernel.org>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=216836
Co-developed-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20221228125714.16329-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2022-12-28 14:05:06 +01:00
Paolo Bonzini
a5496886eb Merge branch 'kvm-late-6.1-fixes' into HEAD
x86:

* several fixes to nested VMX execution controls

* fixes and clarification to the documentation for Xen emulation

* do not unnecessarily release a pmu event with zero period

* MMU fixes

* fix Coverity warning in kvm_hv_flush_tlb()

selftests:

* fixes for the ucall mechanism in selftests

* other fixes mostly related to compilation with clang
2022-12-28 07:19:14 -05:00
Paolo Bonzini
129c48cde6 KVM: selftests: restore special vmmcall code layout needed by the harness
Commit 8fda37cf3d ("KVM: selftests: Stuff RAX/RCX with 'safe' values
in vmmcall()/vmcall()", 2022-11-21) broke the svm_nested_soft_inject_test
because it placed a "pop rbp" instruction after vmmcall.  While this is
correct and mimics what is done in the VMX case, this particular test
expects a ud2 instruction right after the vmmcall, so that it can skip
over it in the L1 part of the test.

Inline a suitably-modified version of vmmcall() to restore the
functionality of the test.

Fixes: 8fda37cf3d ("KVM: selftests: Stuff RAX/RCX with 'safe' values in vmmcall()/vmcall()"
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20221130181147.9911-1-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-12-28 07:18:01 -05:00
Paolo Bonzini
02d9a04da4 Documentation: kvm: clarify SRCU locking order
Currently only the locking order of SRCU vs kvm->slots_arch_lock
and kvm->slots_lock is documented.  Extend this to kvm->lock
since Xen emulation got it terribly wrong.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-12-28 06:02:54 -05:00
Paolo Bonzini
a79b53aaaa KVM: x86: fix deadlock for KVM_XEN_EVTCHN_RESET
While KVM_XEN_EVTCHN_RESET is usually called with no vCPUs running,
if that happened it could cause a deadlock.  This is due to
kvm_xen_eventfd_reset() doing a synchronize_srcu() inside
a kvm->lock critical section.

To avoid this, first collect all the evtchnfd objects in an
array and free all of them once the kvm->lock critical section
is over and th SRCU grace period has expired.

Reported-by: Michal Luczaj <mhal@rbox.co>
Cc: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-12-28 05:53:57 -05:00
Stefan Metzmacher
9eb803402a uapi:io_uring.h: allow linux/time_types.h to be skipped
include/uapi/linux/io_uring.h is synced 1:1 into
liburing:src/include/liburing/io_uring.h.

liburing has a configure check to detect the need for
linux/time_types.h. It can opt-out by defining
UAPI_LINUX_IO_URING_H_SKIP_LINUX_TIME_TYPES_H

Fixes: 78a861b949 ("io_uring: add sync cancelation API through io_uring_register()")
Link: https://github.com/axboe/liburing/issues/708
Link: https://github.com/axboe/liburing/pull/709
Link: https://lore.kernel.org/io-uring/20221115212614.1308132-1-ammar.faizi@intel.com/T/#m9f5dd571cd4f6a5dee84452dbbca3b92ba7a4091
CC: Jens Axboe <axboe@kernel.dk>
Cc: Ammar Faizi <ammarfaizi2@gnuweeb.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
Link: https://lore.kernel.org/r/7071a0a1d751221538b20b63f9160094fc7e06f4.1668630247.git.metze@samba.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-12-27 07:32:51 -07:00
Mathieu Desnoyers
94cd8fa09f futex: Fix futex_waitv() hrtimer debug object leak on kcalloc error
In a scenario where kcalloc() fails to allocate memory, the futex_waitv
system call immediately returns -ENOMEM without invoking
destroy_hrtimer_on_stack(). When CONFIG_DEBUG_OBJECTS_TIMERS=y, this
results in leaking a timer debug object.

Fixes: bf69bad38c ("futex: Implement sys_futex_waitv()")
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Cc: stable@vger.kernel.org
Cc: stable@vger.kernel.org # v5.16+
Link: https://lore.kernel.org/r/20221214222008.200393-1-mathieu.desnoyers@efficios.com
2022-12-27 12:52:02 +01:00
Masami Hiramatsu (Google)
63dc6325ff x86/kprobes: Fix optprobe optimization check with CONFIG_RETHUNK
Since the CONFIG_RETHUNK and CONFIG_SLS will use INT3 for stopping
speculative execution after function return, kprobe jump optimization
always fails on the functions with such INT3 inside the function body.
(It already checks the INT3 padding between functions, but not inside
 the function)

To avoid this issue, as same as kprobes, check whether the INT3 comes
from kgdb or not, and if so, stop decoding and make it fail. The other
INT3 will come from CONFIG_RETHUNK/CONFIG_SLS and those can be
treated as a one-byte instruction.

Fixes: e463a09af2 ("x86: Add straight-line-speculation mitigation")
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/167146051929.1374301.7419382929328081706.stgit@devnote3
2022-12-27 12:51:58 +01:00
Masami Hiramatsu (Google)
1993bf9799 x86/kprobes: Fix kprobes instruction boudary check with CONFIG_RETHUNK
Since the CONFIG_RETHUNK and CONFIG_SLS will use INT3 for stopping
speculative execution after RET instruction, kprobes always failes to
check the probed instruction boundary by decoding the function body if
the probed address is after such sequence. (Note that some conditional
code blocks will be placed after function return, if compiler decides
it is not on the hot path.)

This is because kprobes expects kgdb puts the INT3 as a software
breakpoint and it will replace the original instruction.
But these INT3 are not such purpose, it doesn't need to recover the
original instruction.

To avoid this issue, kprobes checks whether the INT3 is owned by
kgdb or not, and if so, stop decoding and make it fail. The other
INT3 will come from CONFIG_RETHUNK/CONFIG_SLS and those can be
treated as a one-byte instruction.

Fixes: e463a09af2 ("x86: Add straight-line-speculation mitigation")
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/167146051026.1374301.392728975473572291.stgit@devnote3
2022-12-27 12:51:58 +01:00
Arnd Bergmann
ade8c20847 x86/calldepth: Fix incorrect init section references
The addition of callthunks_translate_call_dest means that
skip_addr() and patch_dest() can no longer be discarded
as part of the __init section freeing:

WARNING: modpost: vmlinux.o: section mismatch in reference: callthunks_translate_call_dest.cold (section: .text.unlikely) -> skip_addr (section: .init.text)
WARNING: modpost: vmlinux.o: section mismatch in reference: callthunks_translate_call_dest.cold (section: .text.unlikely) -> patch_dest (section: .init.text)
WARNING: modpost: vmlinux.o: section mismatch in reference: is_callthunk.cold (section: .text.unlikely) -> skip_addr (section: .init.text)
ERROR: modpost: Section mismatches detected.
Set CONFIG_SECTION_MISMATCH_WARN_ONLY=y to allow them.

Fixes: b2e9dfe54b ("x86/bpf: Emit call depth accounting if required")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20221215164334.968863-1-arnd@kernel.org
2022-12-27 12:51:58 +01:00