SeongJae Park [Sun, 22 Jan 2023 18:48:34 +0000 (18:48 +0000)]
Docs/subsystem-apis: Remove '[The ]Linux' prefixes from titles of listed documents
Some documents that listed on subsystem-apis have 'Linux' or 'The Linux'
title prefixes. It's duplicated information, and makes finding the
document of interest with human eyes not easy. Remove the prefixes from
the titles.
Signed-off-by: SeongJae Park <sj@kernel.org> Acked-by: Iwona Winiarska <iwona.winiarska@intel.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://lore.kernel.org/r/20230122184834.181977-1-sj@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Jeffrey Hugo [Thu, 19 Jan 2023 16:26:08 +0000 (09:26 -0700)]
docs: accel: Fix debugfs path
The device specific directory in debugfs does not have "accel". For
example, the documentation says device 0 should have a debugfs entry as
/sys/kernel/debug/accel/accel0/ but in reality the entry is
/sys/kernel/debug/accel/0/
Fix the documentation to match the implementation.
Yanteng Si [Tue, 17 Jan 2023 09:34:16 +0000 (17:34 +0800)]
docs/zh_CN: Add a glossary of Chinese translation terms
As more and more documents are translated and some English
words are translated into different Chinese, it seems that
we need a glossary of Chinese translation terms.
Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Reviewed-by: Alex Shi <alexs@kernel.org> Reviewed-by: Tang Yizhou <tangyeechou@gmail.com> Acked-by: Wu XiangCheng <bobwxc@email.cn> Link: https://lore.kernel.org/r/20230117093416.2262787-1-siyanteng@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Kees Cook [Fri, 6 Jan 2023 20:06:04 +0000 (12:06 -0800)]
docs: deprecated.rst: Add note about DECLARE_FLEX_ARRAY() usage
There wasn't any mention of when/where DECLARE_FLEX_ARRAY() should be
used, so add the rationale and an example to the deprecation docs.
Suggested-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr> Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20230106200600.never.735-kees@kernel.org
[jc: minor wording tweaks] Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Conor Dooley [Sat, 31 Dec 2022 15:23:21 +0000 (15:23 +0000)]
Documentation: process: Document suitability of Proton Mail for kernel development
Proton Mail automatically picks up PGP keys for those with kernel.org
accounts (and other domains!) which provide WKD for their users & uses
them to encrypt emails, including patches.
Document the behaviour & Proton Mail's unsuitability for kernel
development.
Reviewed-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org> Reviewed-by: Mark Brown <broonie@kernel.org> Signed-off-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20221231152320.1340874-1-conor@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Federico Vaga [Sat, 31 Dec 2022 13:08:49 +0000 (14:08 +0100)]
doc:it_IT: align Italian documentation
Translation for the following patches
commit da4288b95baa ("scripts/check-local-export: avoid 'wait $!' for process substitution")
commit 5372de4e4545 ("docs/doc-guide: Put meta title for kernel-doc HTML page")
commit 4d627ef12b40 ("docs/doc-guide: Mention make variable SPHINXDIRS")
commit 7c43214dddfd ("docs/doc-guide: Add footnote on Inkscape for better images in PDF documents")
commit 615041d42a1a ("docs: kernel-docs: shorten the lengthy doc title")
commit cbf4adfd4d19 ("Documentation: process: Update email client instructions for Thunderbird")
commit e72b3b9810dd ("maintainer-pgp-guide: minor wording tweaks")
commit ea522496afa1 ("Documentation: process: replace outdated LTS table w/ link")
commit 93431e0607e5 ("Replace HTTP links with HTTPS ones: documentation")
commit e648174b53f1 ("Documentation: Fix spelling mistake in hacking.rst")
commit 602684adb42a ("docs: Update version number from 5.x to 6.x in README.rst")
commit 489876063fb1 ("docs: add a man-pages link to the front page")
commit 0c7b4366f1ab ("docs: Rewrite the front page")
Akira Yokosawa [Tue, 10 Jan 2023 09:47:25 +0000 (18:47 +0900)]
docs/conf.py: Use about.html only in sidebar of alabaster theme
"about.html" is available only for the alabaster theme [1].
Unconditionally putting it to html_sidebars prevents us from
using other themes which respect html_sidebars.
Remove about.html from the initialization and insert it at the
front for the alabaster theme.
Link: [1] https://alabaster.readthedocs.io/en/latest/installation.html#sidebars Fixes: d5389d3145ef ("docs: Switch the default HTML theme to alabaster") Signed-off-by: Akira Yokosawa <akiyks@gmail.com> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Link: https://lore.kernel.org/r/4b162dbe-2a7f-1710-93e0-754cf8680aae@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Jonathan Corbet [Wed, 4 Jan 2023 20:59:16 +0000 (13:59 -0700)]
docs: Deprecate use of Sphinx < 2.4.x
The Sphinx 2.4 release is three years old, and it is becoming increasingly
difficult to even find a system with an sufficiently archaic Python
installation that can run versions older than that. I can no longer test
changes against anything prior to 2.4.x.
Move toward raising our minimum Sphinx requirement to 2.4.x so we can
delete some older support code and claim to support a range of versions
that we can actually test.
In the absence of screams, the actual removal of support can happen later
in 2023.
Jonathan Corbet [Wed, 4 Jan 2023 17:47:39 +0000 (10:47 -0700)]
docs: Fix the docs build with Sphinx 6.0
Sphinx 6.0 removed the execfile_() function, which we use as part of the
configuration process. They *did* warn us... Just open-code the
functionality as is done in Sphinx itself.
Tested (using SPHINX_CONF, since this code is only executed with an
alternative config file) on various Sphinx versions from 2.5 through 6.0.
Reported-by: Martin Liška <mliska@suse.cz> Cc: stable@vger.kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Konstantin Ryabitsev [Tue, 20 Dec 2022 19:44:17 +0000 (14:44 -0500)]
docs: maintainer-pgp-guide: update for latest gnupg defaults
It is finally becoming increasingly rare to find a distribution that
still ships with gnupg-1.x, so remove the last vestiges of "gpg" vs
"gpg2" from documentation.
Similarly, starting with GnuPG 2.2 and above, the default --gen-key
operation creates ed25519/cv25519 keypairs, so update all example
command outputs to use that combination instead of rsa2048.
Lastly, add a few wording tweaks and remove links that lead to stale
information (e.g. hardware tokens overview from 2017).
Yang Yang [Fri, 9 Dec 2022 06:21:53 +0000 (14:21 +0800)]
docs: proc.rst: add softnet_stat to /proc/net table
/proc/net/softnet_stat exists for a long time, but proc.rst miss it.
Softnet_stat shows some statistics of struct softnet_data of online
CPUs. Struct softnet_data manages incoming and output packets
on per-CPU queues. Note that fastroute and cpu_collision in
softnet_stat are obsolete and their value is always 0.
Signed-off-by: Yang Yang <yang.yang29@zte.com.cn> Reviewed-by: xu xin <xu.xin16@zte.com.cn> Reviewed-by: Zhang Yunkai <zhang.yunkai@zte.com.cn> Link: https://lore.kernel.org/r/202212091421536982085@zte.com.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Yanteng Si [Sat, 10 Dec 2022 03:27:05 +0000 (11:27 +0800)]
docs/zh_CN: Update the translation of energy-model to 6.1-rc8
Update to commit c5d39fae8992 ("Documentation: EM: Switch to
micro-Watts scale")
commit f48a0c475c2a ("Documentation: EM: Describe new registration
method using DT")
commit 75a3a99a5a98 ("PM: EM: Change the order of arguments in the
.active_power() callback")
commit 015f569c4649 ("Documentation: EM: Add artificial EM
registration description")
Yanteng Si [Sat, 10 Dec 2022 03:24:49 +0000 (11:24 +0800)]
docs/zh_CN: Update the translation of highmem to 6.1-rc8
Update to commit a9e9c93966af ("Documentation/mm: add
details about kmap_local_page() and preemption").
Commit 84b86f6054c4 ("Documentation/mm: rrefer
kmap_local_page() and avoid kmap()").
Commit 6b3afe2eeec2 ("Documentation/mm: avoid
invalid use of addresses from kmap_local_page()").
Commit 516ea046ec55 ("Documentation/mm: don't kmap*()
pages which can't come from HIGHMEM").
Yanteng Si [Sat, 10 Dec 2022 03:24:47 +0000 (11:24 +0800)]
docs/zh_CN: Update the translation of kernel-api to 6.1-rc8
Update to commit d28a1de5d112 ("math64: favor kernel-doc
from header files").
Commit 03699f271de1 ("string: Rewrite and add more kern-doc
for the str*() functions").
Commit 31970608a6d3 ("overflow: Fix kern-doc markup for
functions")
Linus Torvalds [Sun, 1 Jan 2023 19:27:00 +0000 (11:27 -0800)]
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
Linus Torvalds [Sun, 1 Jan 2023 19:11:13 +0000 (11:11 -0800)]
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
Linus Torvalds [Sat, 31 Dec 2022 18:21:47 +0000 (10:21 -0800)]
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
Linus Torvalds [Fri, 30 Dec 2022 18:47:25 +0000 (10:47 -0800)]
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
Linus Torvalds [Fri, 30 Dec 2022 18:30:54 +0000 (10:30 -0800)]
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
Rafael J. Wysocki [Fri, 30 Dec 2022 15:59:10 +0000 (16:59 +0100)]
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
Jani Nikula [Mon, 19 Dec 2022 10:59:55 +0000 (12:59 +0200)]
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()
Masahiro Yamada [Wed, 28 Dec 2022 19:10:14 +0000 (04:10 +0900)]
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 8818039f959b
("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: 8818039f959b ("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>
Samuel Holland [Tue, 27 Dec 2022 21:48:21 +0000 (15:48 -0600)]
kbuild: Fix running modpost with musl libc
commit 3d57e1b7b1d4 ("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: 3d57e1b7b1d4 ("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>
Masahiro Yamada [Mon, 26 Dec 2022 18:54:44 +0000 (03:54 +0900)]
.gitignore: ignore *.rpm
Previously, *.rpm files were created under $HOME/rpmbuild/, but since
commit 8818039f959b ("kbuild: add ability to make source rpm buildable
using koji"), srcrpm-pkg creates the source rpm in the kernel tree
because it sets '_srcrpmdir'.
Masahiro Yamada [Mon, 26 Dec 2022 18:45:37 +0000 (03:45 +0900)]
arch: fix broken BuildID for arm64 and riscv
Dennis Gilmore reports that the BuildID is missing in the arm64 vmlinux
since commit 994b7ac1697b ("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 2348e6bf4421 ("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: 994b7ac1697b ("arm64: remove special treatment for the link order of head.o") Fixes: 2348e6bf4421 ("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>
John Harrison [Wed, 21 Dec 2022 19:30:31 +0000 (11:30 -0800)]
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: 016241168dc5 ("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 4071d98b296a5bc5fd4b15ec651bd05800ec9510) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Matthew Auld [Fri, 16 Dec 2022 11:34:56 +0000 (11:34 +0000)]
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.
Lucas De Marchi [Wed, 14 Dec 2022 19:49:44 +0000 (11:49 -0800)]
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.
Andrzej Hajda [Wed, 14 Dec 2022 07:54:39 +0000 (08:54 +0100)]
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: 77fa9efc16a9 ("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 4d5cf7b1680a1e6db327e3c935ef58325cbedb2c) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Linus Torvalds [Fri, 30 Dec 2022 00:57:29 +0000 (16:57 -0800)]
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
Linus Torvalds [Fri, 30 Dec 2022 00:48:21 +0000 (16:48 -0800)]
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
Linus Torvalds [Thu, 29 Dec 2022 18:56:13 +0000 (10:56 -0800)]
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
...
Jens Axboe [Thu, 29 Dec 2022 18:31:45 +0000 (11:31 -0700)]
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
Christoph Hellwig [Tue, 13 Dec 2022 15:13:38 +0000 (16:13 +0100)]
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: e4fbcf32c860 ("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>
Christoph Hellwig [Wed, 21 Dec 2022 09:12:17 +0000 (10:12 +0100)]
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>
Christoph Hellwig [Wed, 21 Dec 2022 08:51:19 +0000 (09:51 +0100)]
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: c1fef73f793b ("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>
Christoph Hellwig [Mon, 12 Dec 2022 14:20:56 +0000 (15:20 +0100)]
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>
Christoph Hellwig [Mon, 12 Dec 2022 10:09:55 +0000 (11:09 +0100)]
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>
Takashi Iwai [Wed, 28 Dec 2022 12:57:14 +0000 (13:57 +0100)]
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
Paolo Bonzini [Wed, 30 Nov 2022 18:11:47 +0000 (13:11 -0500)]
KVM: selftests: restore special vmmcall code layout needed by the harness
Commit 8fda37cf3d41 ("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: 8fda37cf3d41 ("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>
Paolo Bonzini [Wed, 28 Dec 2022 11:00:22 +0000 (06:00 -0500)]
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>
Paolo Bonzini [Wed, 28 Dec 2022 10:33:41 +0000 (05:33 -0500)]
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>
Mathieu Desnoyers [Wed, 14 Dec 2022 22:20:08 +0000 (17:20 -0500)]
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.
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.
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.
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:
Namhyung Kim [Tue, 20 Dec 2022 22:31:40 +0000 (14:31 -0800)]
perf/core: Call LSM hook after copying perf_event_attr
It passes the attr struct to the security_perf_event_open() but it's
not initialized yet.
Fixes: da97e18458fb ("perf_event: Add support for LSM and SELinux checks") Signed-off-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20221220223140.4020470-1-namhyung@kernel.org
Colin Ian King [Fri, 2 Dec 2022 13:51:49 +0000 (13:51 +0000)]
perf/x86/amd: fix potential integer overflow on shift of a int
The left shift of int 32 bit integer constant 1 is evaluated using 32 bit
arithmetic and then passed as a 64 bit function argument. In the case where
i is 32 or more this can lead to an overflow. Avoid this by shifting
using the BIT_ULL macro instead.
Fixes: 471af006a747 ("perf/x86/amd: Constrain Large Increment per Cycle events") Signed-off-by: Colin Ian King <colin.i.king@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Ian Rogers <irogers@google.com> Acked-by: Kim Phillips <kim.phillips@amd.com> Link: https://lore.kernel.org/r/20221202135149.1797974-1-colin.i.king@gmail.com
We can see from above that we wrongly use percpu atomic perf_cgroup_events
to check if we need to perf_cgroup_switch(), which should only be used
when we know this CPU has cgroup events enabled.
The commit bd2756811766 ("perf: Rewrite core context handling") change
to have only one context per-CPU, so we can just use cpuctx->cgrp to
check if this CPU has cgroup events enabled.
So percpu atomic perf_cgroup_events is not needed.
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