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It has been reported that isolated CPUs can suffer from interference due to
per-CPU kworkers waking up just to die.
A surge of workqueue activity during initial setup of a latency-sensitive
application (refresh_vm_stats() being one of the culprits) can cause extra
per-CPU kworkers to be spawned. Then, said latency-sensitive task can be
running merrily on an isolated CPU only to be interrupted sometime later by
a kworker marked for death (cf. IDLE_WORKER_TIMEOUT, 5 minutes after last
kworker activity).
Prevent this by affining kworkers to the wq_unbound_cpumask (which doesn't
contain isolated CPUs, cf. HK_TYPE_WQ) before waking them up after marking
them with WORKER_DIE.
Changing the affinity does require a sleepable context, leverage the newly
introduced pool->idle_cull_work to get that.
Remove dying workers from pool->workers and keep track of them in a
separate list. This intentionally prevents for_each_loop_worker() from
iterating over workers that are marked for death.
Rename destroy_worker() to set_working_dying() to better reflect its
effects and relationship with wake_dying_workers().
Signed-off-by: Valentin Schneider <vschneid@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
put_unbound_pool() currently passes wq_manager_inactive() as exit condition
to rcuwait_wait_event(), which grabs pool->lock to check for
pool->flags & POOL_MANAGER_ACTIVE
A later patch will require destroy_worker() to be invoked with
wq_pool_attach_mutex held, which needs to be acquired before
pool->lock. A mutex cannot be acquired within rcuwait_wait_event(), as
it could clobber the task state set by rcuwait_wait_event()
Instead, restructure the waiting logic to acquire any necessary lock
outside of rcuwait_wait_event().
Since further work cannot be inserted into unbound pwqs that have reached
->refcnt==0, this is bound to make forward progress as eventually the
worklist will be drained and need_more_worker(pool) will remain false,
preventing any worker from stealing the manager position from us.
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Valentin Schneider <vschneid@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
A later patch will require a sleepable context in the idle worker timeout
function. Converting worker_pool.idle_timer to a delayed_work gives us just
that, however this would imply turning all idle_timer expiries into
scheduler events (waking up a worker to handle the dwork).
Instead, implement a "custom dwork" where the timer callback does some
extra checks before queuing the associated work.
No change in functionality intended.
Signed-off-by: Valentin Schneider <vschneid@redhat.com>
Reviewed-by: Lai Jiangshan <jiangshanlai@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Later patches will reuse this code, move it into reusable functions.
Signed-off-by: Valentin Schneider <vschneid@redhat.com>
Reviewed-by: Lai Jiangshan <jiangshanlai@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
When unbind_workers() reads wq_unbound_cpumask to set the affinity of
freshly-unbound kworkers, it only holds wq_pool_attach_mutex. This isn't
sufficient as wq_unbound_cpumask is only protected by wq_pool_mutex.
Make wq_unbound_cpumask protected with wq_pool_attach_mutex and also
remove the need of temporary saved_cpumask.
Fixes: 10a5a651e3af ("workqueue: Restrict kworker in the offline CPU pool running on housekeeping CPUs")
Reported-by: Valentin Schneider <vschneid@redhat.com>
Signed-off-by: Lai Jiangshan <jiangshan.ljs@antgroup.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
The show_pwq() function dumps out a pool_workqueue structure's activity,
including the pending work-queue handlers:
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=10/256 refcnt=11
in-flight: 7:test_work_func, 64:test_work_func, 249:test_work_func
pending: test_work_func, test_work_func, test_work_func1, test_work_func1, test_work_func1, test_work_func1, test_work_func1
When large systems are facing certain types of hang conditions, it is not
unusual for this "pending" list to contain runs of hundreds of identical
function names. This "wall of text" is difficult to read, and worse yet,
it can be interleaved with other output such as stack traces.
Therefore, make show_pwq() use run-length encoding so that the above
printout instead looks like this:
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=10/256 refcnt=11
in-flight: 7:test_work_func, 64:test_work_func, 249:test_work_func
pending: 2*test_work_func, 5*test_work_func1
When no comma would be printed, including the WORK_STRUCT_LINKED case,
a new run is started unconditionally.
This output is more readable, places less stress on the hardware,
firmware, and software on the console-log path, and reduces interference
with other output.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Dave Jones <davej@codemonkey.org.uk>
Cc: Rik van Riel <riel@surriel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Currently if the user queues a new work item unintentionally
into a wq after the destroy_workqueue(wq), the work still can
be queued and scheduled without any noticeable kernel message
before the end of a RCU grace period.
As a debug-aid facility, this commit adds a new flag
__WQ_DESTROYING to spot that issue by triggering a kernel WARN
message.
Signed-off-by: Richard Clark <richard.xnu.clark@gmail.com>
Reviewed-by: Lai Jiangshan <jiangshanlai@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
a header namespace clash and a bug in ib_prctl_set().
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-urgent-2023-01-04' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull misc x86 fixes from Ingo Molnar:
"Fix a double-free bug, a binutils warning, a header namespace clash
and a bug in ib_prctl_set()"
* tag 'x86-urgent-2023-01-04' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/bugs: Flush IBP in ib_prctl_set()
x86/insn: Avoid namespace clash by separating instruction decoder MMIO type from MMIO trace type
x86/asm: Fix an assembler warning with current binutils
x86/kexec: Fix double-free of elf header buffer
This series fixes the below three bugs introduced in 6.2-rc1.
- fix a null pointer dereference in f2fs_issue_flush, which occurs by the
combination of mount/remount options.
- fix a bug in per-block age-based extent_cache newly introduced in 6.2-rc1,
which reported a wrong age information in extent_cache.
- fix a kernel panic if extent_tree was not created, which was caught by a
wrong BUG_ON.
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Merge tag 'f2fs-fix-6.2-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
Pull f2fs fixes from Jaegeuk Kim:
- fix a null pointer dereference in f2fs_issue_flush, which occurs by
the combination of mount/remount options.
- fix a bug in per-block age-based extent_cache newly introduced in
6.2-rc1, which reported a wrong age information in extent_cache.
- fix a kernel panic if extent_tree was not created, which was caught
by a wrong BUG_ON
* tag 'f2fs-fix-6.2-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs:
f2fs: let's avoid panic if extent_tree is not created
f2fs: should use a temp extent_info for lookup
f2fs: don't mix to use union values in extent_info
f2fs: initialize extent_cache parameter
f2fs: fix to avoid NULL pointer dereference in f2fs_issue_flush()
- Fix a filecache UAF during NFSD shutdown
- Avoid exposing automounted mounts on NFS re-exports
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Merge tag 'nfsd-6.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
Pull nfsd fixes from Chuck Lever:
- Fix a filecache UAF during NFSD shutdown
- Avoid exposing automounted mounts on NFS re-exports
* tag 'nfsd-6.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
nfsd: fix handling of readdir in v4root vs. mount upcall timeout
nfsd: shut down the NFSv4 state objects before the filecache
We missed the window between the TIF flag update and the next reschedule.
Signed-off-by: Rodrigo Branco <bsdaemon@google.com>
Reviewed-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: <stable@vger.kernel.org>
Both <linux/mmiotrace.h> and <asm/insn-eval.h> define various MMIO_ enum constants,
whose namespace overlaps.
Rename the <asm/insn-eval.h> ones to have a INSN_ prefix, so that the headers can be
used from the same source file.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230101162910.710293-2-Jason@zx2c4.com
With below two cases, it will cause NULL pointer dereference when
accessing SM_I(sbi)->fcc_info in f2fs_issue_flush().
a) If kthread_run() fails in f2fs_create_flush_cmd_control(), it will
release SM_I(sbi)->fcc_info,
- mount -o noflush_merge /dev/vda /mnt/f2fs
- mount -o remount,flush_merge /dev/vda /mnt/f2fs -- kthread_run() fails
- dd if=/dev/zero of=/mnt/f2fs/file bs=4k count=1 conv=fsync
b) we will never allocate memory for SM_I(sbi)->fcc_info w/ below
testcase,
- mount -o ro /dev/vda /mnt/f2fs
- mount -o rw,remount /dev/vda /mnt/f2fs
- dd if=/dev/zero of=/mnt/f2fs/file bs=4k count=1 conv=fsync
In order to fix this issue, let change as below:
- fix error path handling in f2fs_create_flush_cmd_control().
- allocate SM_I(sbi)->fcc_info even if readonly is on.
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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Merge tag 'for-6.2-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"First batch of regression and regular fixes:
- regressions:
- fix error handling after conversion to qstr for paths
- fix raid56/scrub recovery caused by uninitialized variable
after conversion to error bitmaps
- restore qgroup backref lookup behaviour after recent
refactoring
- fix leak of device lists at module exit time
- fix resolving backrefs for inline extent followed by prealloc
- reset defrag ioctl buffer on memory allocation error"
* tag 'for-6.2-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: fix fscrypt name leak after failure to join log transaction
btrfs: scrub: fix uninitialized return value in recover_scrub_rbio
btrfs: fix resolving backrefs for inline extent followed by prealloc
btrfs: fix trace event name typo for FLUSH_DELAYED_REFS
btrfs: restore BTRFS_SEQ_LAST when looking up qgroup backref lookup
btrfs: fix leak of fs devices after removing btrfs module
btrfs: fix an error handling path in btrfs_defrag_leaves()
btrfs: fix an error handling path in btrfs_rename()
syzbot is reporting hung task at do_user_addr_fault() [1], for there is
a silent deadlock between PG_locked bit and ni_lock lock.
Since filemap_update_page() calls filemap_read_folio() after calling
folio_trylock() which will set PG_locked bit, ntfs_truncate() must not
call truncate_setsize() which will wait for PG_locked bit to be cleared
when holding ni_lock lock.
Link: https://lore.kernel.org/all/00000000000060d41f05f139aa44@google.com/
Link: https://syzkaller.appspot.com/bug?extid=bed15dbf10294aa4f2ae [1]
Reported-by: syzbot <syzbot+bed15dbf10294aa4f2ae@syzkaller.appspotmail.com>
Debugged-by: Linus Torvalds <torvalds@linux-foundation.org>
Co-developed-by: Hillf Danton <hdanton@sina.com>
Signed-off-by: Hillf Danton <hdanton@sina.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Fixes: 4342306f0f0d ("fs/ntfs3: Add file operations and implementation")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
After
b3e34a47f989 ("x86/kexec: fix memory leak of elf header buffer"),
freeing image->elf_headers in the error path of crash_load_segments()
is not needed because kimage_file_post_load_cleanup() will take
care of that later. And not clearing it could result in a double-free.
Drop the superfluous vfree() call at the error path of
crash_load_segments().
Fixes: b3e34a47f989 ("x86/kexec: fix memory leak of elf header buffer")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Baoquan He <bhe@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: <stable@kernel.org>
Link: https://lore.kernel.org/r/20221122115122.13937-1-tiwai@suse.de
If v4 READDIR operation hits a mountpoint and gets back an error,
then it will include that entry in the reply and set RDATTR_ERROR for it
to the error.
That's fine for "normal" exported filesystems, but on the v4root, we
need to be more careful to only expose the existence of dentries that
lead to exports.
If the mountd upcall times out while checking to see whether a
mountpoint on the v4root is exported, then we have no recourse other
than to fail the whole operation.
Cc: Steve Dickson <steved@redhat.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=216777
Reported-by: JianHong Yin <yin-jianhong@163.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: <stable@vger.kernel.org>
- 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
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
- 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
- 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
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
- 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
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
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
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: 963bbdb32b47 ("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 a561933c571798868b5fa42198427a7e6df56c09)
Cc: stable@vger.kernel.org # 6.1
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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 f087cfe6fcff58044f7aa3b284965af47f472fb0)
Cc: stable@vger.kernel.org # 6.1
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This is unneeded since commit 69304379ff03 ("fixdep: use fflush() and
ferror() to ensure successful write to files").
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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>
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>
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>
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>
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'.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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>
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>
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: 7e00897be8bf ("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 801fa7a81f6da533cc5442fc40e32c72b76cd42a)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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: 7835303982d1 ("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 50490ce05b7a50b0bd4108fa7d6db3ca2972fa83)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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>
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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
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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
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
...
