Current Qualcomm UEFI firmware does not implement the variable services
but not all revisions clear the corresponding bits in the RT_PROP table
services mask and instead the corresponding calls return
EFI_UNSUPPORTED.

This leads to efi core registering the generic efivar ops even when the
variable services are not supported or when they are accessed through
some other interface (e.g. Google SMI or the upcoming Qualcomm SCM
implementation).

Instead of playing games with init call levels to make sure that the
custom implementations are registered after the generic one, make sure
that get_next_variable() is actually supported before registering the
generic ops.

Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

The efivar ops are typically registered at subsys init time so that
they are available when efivarfs is registered at module init time.

Other efivars implementations, such as Google SMI, exist and can
currently be built as modules which means that efivar may not be
available when efivarfs is initialised.

Move the efivar availability check from module init to when the
filesystem is mounted to allow late registration of efivars.

Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

Add an 'efivars: ' printk prefix to make the log entries stand out more,
for example:

	efivars: Registered efivars operations

While at it, change the sole remaining direct printk() call to pr_err().

Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

Doing so cannot work and should never happen.

Signed-off-by: Demi Marie Obenour <demi@invisiblethingslab.com>
Tested-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

The ESRT can be parsed if EFI_PARAVIRT is enabled, even if EFI_MEMMAP is
not.  Also allow the ESRT to be in reclaimable memory, as that is where
future Xen versions will put it.

Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Signed-off-by: Demi Marie Obenour <demi@invisiblethingslab.com>
Tested-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

As it turns out, Xen does not guarantee that EFI boot services data
regions in memory are preserved, which means that EFI configuration
tables pointing into such memory regions may be corrupted before the
dom0 OS has had a chance to inspect them.

This is causing problems for Qubes OS when it attempts to perform system
firmware updates, which requires that the contents of the EFI System
Resource Table are valid when the fwupd userspace program runs.

However, other configuration tables such as the memory attributes table
or the runtime properties table are equally affected, and so we need a
comprehensive workaround that works for any table type.

So when running under Xen, check the EFI memory descriptor covering the
start of the table, and disregard the table if it does not reside in
memory that is preserved by Xen.

Co-developed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Demi Marie Obenour <demi@invisiblethingslab.com>
Tested-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

Xen on x86 boots dom0 in EFI mode but without providing a memory map.
This means that some consistency checks we would like to perform on
configuration tables or other data structures in memory are not
currently possible.  Xen does, however, expose EFI memory descriptor
info via a Xen hypercall, so let's wire that up instead.  It turns out
that the returned information is not identical to what Linux's
efi_mem_desc_lookup would return: the address returned is the address
passed to the hypercall, and the size returned is the number of bytes
remaining in the configuration table.  However, none of the callers of
efi_mem_desc_lookup() currently care about this.  In the future, Xen may
gain a hypercall that returns the actual start address, which can be
used instead.

Co-developed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Demi Marie Obenour <demi@invisiblethingslab.com>
Tested-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

The ESRT code currently contains two consistency checks on the memory
descriptor it obtains, but one of them is both incomplete and can only
trigger on invalid descriptors.

So let's drop these checks, and instead disregard descriptors entirely
if the start address is misaligned, or if the number of pages reaches
to or beyond the end of the address space.  Note that the memory map as
a whole could still be inconsistent: multiple entries might cover the
same area, or the address could be outside of the addressable PA space,
but validating that goes beyond the scope of these helpers.  Also note
that since the physical address space is never 64-bits wide, a
descriptor that includes the last page of memory is not valid.  This is
fortunate, since it means that a valid physical address will never be an
error pointer and that the length of a memory descriptor in bytes will
fit in a 64-bit unsigned integer.

Co-developed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Demi Marie Obenour <demi@invisiblethingslab.com>
Tested-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

For consistency with the new efivar_is_available() function, change the
return type of efivar_supports_writes() to bool.

Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

Since commit 0f5b2c69

 ("efi: vars: Remove deprecated 'efivars' sysfs
interface") and the removal of the sysfs interface there are no users of
the efivars kobject.

Drop the kobject argument from efivars_register() and add a new
efivar_is_available() helper in favour of the old efivars_kobject().

Note that the new helper uses the prefix 'efivar' (i.e. without an 's')
for consistency with efivar_supports_writes() and the rest of the
interface (except the registration functions).

For the benefit of drivers with optional EFI support, also provide a
dummy implementation of efivar_is_available().

Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

Currently the scroll copies the full screen which is slow on high
resolution displays. At the same time, most of the screen is an empty
space which has no need to be copied over and over.

Optimize the scrolling algorithm by caching the x coordinates of the
last printed lines and scroll in accordance with the maximum x in that
cache.

On my Microsoft Surface Book (the first version) this produces a
significant speedup of the console 90 seconds vs. 168 seconds with the
kernel command line having

	ignore_loglevel earlycon=efifb keep_bootcon

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

strnchrnul() can be called in the early stages. Replace
open coded variant in the EFI early console driver.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

Due to several bugs caused by timers being re-armed after they are
shutdown and just before they are freed, a new state of timers was added
called "shutdown".  After a timer is set to this state, then it can no
longer be re-armed.

The following script was run to find all the trivial locations where
del_timer() or del_timer_sync() is called in the same function that the
object holding the timer is freed.  It also ignores any locations where
the timer->function is modified between the del_timer*() and the free(),
as that is not considered a "trivial" case.

This was created by using a coccinelle script and the following
commands:

    $ cat timer.cocci
    @@
    expression ptr, slab;
    identifier timer, rfield;
    @@
    (
    -       del_timer(&ptr->timer);
    +       timer_shutdown(&ptr->timer);
    |
    -       del_timer_sync(&ptr->timer);
    +       timer_shutdown_sync(&ptr->timer);
    )
      ... when strict
          when != ptr->timer
    (
            kfree_rcu(ptr, rfield);
    |
            kmem_cache_free(slab, ptr);
    |
            kfree(ptr);
    )

    $ spatch timer.cocci . > /tmp/t.patch
    $ patch -p1 < /tmp/t.patch

Link: https://lore.kernel.org/lkml/20221123201306.823305113@linutronix.de/


Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Acked-by: Pavel Machek <pavel@ucw.cz> [ LED ]
Acked-by: Kalle Valo <kvalo@kernel.org> [ wireless ]
Acked-by: Paolo Abeni <pabeni@redhat.com> [ networking ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull spi fix from Mark Brown:
 "One driver specific change here which handles the case where a SPI
  device for some reason tries to change the bus speed during a message
  on fsl_spi hardware, this should be very unusual"

* tag 'spi-fix-v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: fsl_spi: Don't change speed while chipselect is active

Merge tag 'regulator-fix-v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator fixes from Mark Brown:
 "Two core fixes here, one for a long standing race which some Qualcomm
  systems have started triggering with their UFS driver and another
  fixing a problem with supply lookup introduced by the fixes for devm
  related use after free issues that were introduced in this merge
  window"

* tag 'regulator-fix-v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: core: fix deadlock on regulator enable
  regulator: core: Fix resolve supply lookup issue

Pull coccicheck update from Julia Lawall:
 "Modernize use of grep in coccicheck:

  Use 'grep -E' instead of 'egrep'"

* tag 'coccinelle-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux:
  scripts: coccicheck: use "grep -E" instead of "egrep"

Pull kernel hardening fixes from Kees Cook:

 - Fix CFI failure with KASAN (Sami Tolvanen)

 - Fix LKDTM + CFI under GCC 7 and 8 (Kristina Martsenko)

 - Limit CONFIG_ZERO_CALL_USED_REGS to Clang > 15.0.6 (Nathan
   Chancellor)

 - Ignore "contents" argument in LoadPin's LSM hook handling

 - Fix paste-o in /sys/kernel/warn_count API docs

 - Use READ_ONCE() consistently for oops/warn limit reading

* tag 'hardening-v6.2-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  cfi: Fix CFI failure with KASAN
  exit: Use READ_ONCE() for all oops/warn limit reads
  security: Restrict CONFIG_ZERO_CALL_USED_REGS to gcc or clang > 15.0.6
  lkdtm: cfi: Make PAC test work with GCC 7 and 8
  docs: Fix path paste-o for /sys/kernel/warn_count
  LoadPin: Ignore the "contents" argument of the LSM hooks

Pull pstore fixes from Kees Cook:

 - Switch pmsg_lock to an rt_mutex to avoid priority inversion (John
   Stultz)

 - Correctly assign mem_type property (Luca Stefani)

* tag 'pstore-v6.2-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  pstore: Properly assign mem_type property
  pstore: Make sure CONFIG_PSTORE_PMSG selects CONFIG_RT_MUTEXES
  pstore: Switch pmsg_lock to an rt_mutex to avoid priority inversion

Pull dma-mapping fixes from Christoph Hellwig:
 "Fix up the sound code to not pass __GFP_COMP to the non-coherent DMA
  allocator, as it copes with that just as badly as the coherent
  allocator, and then add a check to make sure no one passes the flag
  ever again"

* tag 'dma-mapping-2022-12-23' of git://git.infradead.org/users/hch/dma-mapping:
  dma-mapping: reject GFP_COMP for noncoherent allocations
  ALSA: memalloc: don't use GFP_COMP for non-coherent dma allocations

Pull 9p updates from Dominique Martinet:

 - improve p9_check_errors to check buffer size instead of msize when
   possible (e.g. not zero-copy)

 - some more syzbot and KCSAN fixes

 - minor headers include cleanup

* tag '9p-for-6.2-rc1' of https://github.com/martinetd/linux:
  9p/client: fix data race on req->status
  net/9p: fix response size check in p9_check_errors()
  net/9p: distinguish zero-copy requests
  9p/xen: do not memcpy header into req->rc
  9p: set req refcount to zero to avoid uninitialized usage
  9p/net: Remove unneeded idr.h #include
  9p/fs: Remove unneeded idr.h #include

Pull more sound updates from Takashi Iwai:
 "A few more updates for 6.2: most of changes are about ASoC
  device-specific fixes.

   - Lots of ASoC Intel AVS extensions and refactoring

   - Quirks for ASoC Intel SOF as well as regression fixes

   - ASoC Mediatek and Rockchip fixes

   - Intel HD-audio HDMI workarounds

   - Usual HD- and USB-audio device-specific quirks"

* tag 'sound-6.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (54 commits)
  ALSA: usb-audio: Add new quirk FIXED_RATE for JBL Quantum810 Wireless
  ALSA: azt3328: Remove the unused function snd_azf3328_codec_outl()
  ASoC: lochnagar: Fix unused lochnagar_of_match warning
  ASoC: Intel: Add HP Stream 8 to bytcr_rt5640.c
  ASoC: SOF: mediatek: initialize panic_info to zero
  ASoC: rt5670: Remove unbalanced pm_runtime_put()
  ASoC: Intel: bytcr_rt5640: Add quirk for the Advantech MICA-071 tablet
  ASoC: Intel: soc-acpi: update codec addr on 0C11/0C4F product
  ASoC: rockchip: spdif: Add missing clk_disable_unprepare() in rk_spdif_runtime_resume()
  ASoC: wm8994: Fix potential deadlock
  ASoC: mediatek: mt8195: add sof be ops to check audio active
  ASoC: SOF: Revert: "core: unregister clients and machine drivers in .shutdown"
  ASoC: SOF: Intel: pci-tgl: unblock S5 entry if DMA stop has failed"
  ALSA: hda/hdmi: fix stream-id config keep-alive for rt suspend
  ALSA: hda/hdmi: set default audio parameters for KAE silent-stream
  ALSA: hda/hdmi: fix i915 silent stream programming flow
  ALSA: hda: Error out if invalid stream is being setup
  ASoC: dt-bindings: fsl-sai: Reinstate i.MX93 SAI compatible string
  ASoC: soc-pcm.c: Clear DAIs parameters after stream_active is updated
  ASoC: codecs: wcd-clsh: Remove the unused function
  ...

Pull drm fixes from Dave Airlie:
 "Holiday fixes!

  Two batches from amd, and one group of i915 changes.

  amdgpu:
   - Spelling fix
   - BO pin fix
   - Properly handle polaris 10/11 overlap asics
   - GMC9 fix
   - SR-IOV suspend fix
   - DCN 3.1.4 fix
   - KFD userptr locking fix
   - SMU13.x fixes
   - GDS/GWS/OA handling fix
   - Reserved VMID handling fixes
   - FRU EEPROM fix
   - BO validation fixes
   - Avoid large variable on the stack
   - S0ix fixes
   - SMU 13.x fixes
   - VCN fix
   - Add missing fence reference

  amdkfd:
   - Fix init vm error handling
   - Fix double release of compute pasid

  i915
   - Documentation fixes
   - OA-perf related fix
   - VLV/CHV HDMI/DP audio fix
   - Display DDI/Transcoder fix
   - Migrate fixes"

* tag 'drm-next-2022-12-23' of git://anongit.freedesktop.org/drm/drm: (39 commits)
  drm/amdgpu: grab extra fence reference for drm_sched_job_add_dependency
  drm/amdgpu: enable VCN DPG for GC IP v11.0.4
  drm/amdgpu: skip mes self test after s0i3 resume for MES IP v11.0
  drm/amd/pm: correct the fan speed retrieving in PWM for some SMU13 asics
  drm/amd/pm: bump SMU13.0.0 driver_if header to version 0x34
  drm/amdgpu: skip MES for S0ix as well since it's part of GFX
  drm/amd/pm: avoid large variable on kernel stack
  drm/amdkfd: Fix double release compute pasid
  drm/amdkfd: Fix kfd_process_device_init_vm error handling
  drm/amd/pm: update SMU13.0.0 reported maximum shader clock
  drm/amd/pm: correct SMU13.0.0 pstate profiling clock settings
  drm/amd/pm: enable GPO dynamic control support for SMU13.0.7
  drm/amd/pm: enable GPO dynamic control support for SMU13.0.0
  drm/amdgpu: revert "generally allow over-commit during BO allocation"
  drm/amdgpu: Remove unnecessary domain argument
  drm/amdgpu: Fix size validation for non-exclusive domains (v4)
  drm/amdgpu: Check if fru_addr is not NULL (v2)
  drm/i915/ttm: consider CCS for backup objects
  drm/i915/migrate: fix corner case in CCS aux copying
  drm/amdgpu: rework reserved VMID handling
  ...

Pull MIPS fixes from Thomas Bogendoerfer:
 "Fixes due to DT changes"

* tag 'mips_6.2_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MIPS: dts: bcm63268: Add missing properties to the TWD node
  MIPS: ralink: mt7621: avoid to init common ralink reset controller

Merge tag 'mm-hotfixes-stable-2022-12-22-14-34' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull hotfixes from Andrew Morton:
 "Eight fixes, all cc:stable. One is for gcov and the remainder are MM"

* tag 'mm-hotfixes-stable-2022-12-22-14-34' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  gcov: add support for checksum field
  test_maple_tree: add test for mas_spanning_rebalance() on insufficient data
  maple_tree: fix mas_spanning_rebalance() on insufficient data
  hugetlb: really allocate vma lock for all sharable vmas
  kmsan: export kmsan_handle_urb
  kmsan: include linux/vmalloc.h
  mm/mempolicy: fix memory leak in set_mempolicy_home_node system call
  mm, mremap: fix mremap() expanding vma with addr inside vma

If mem-type is specified in the device tree
it would end up overriding the record_size
field instead of populating mem_type.

As record_size is currently parsed after the
improper assignment with default size 0 it
continued to work as expected regardless of the
value found in the device tree.

Simply changing the target field of the struct
is enough to get mem-type working as expected.

Fixes: 9d843e8f

 ("pstore: Add mem_type property DT parsing support")
Cc: stable@vger.kernel.org
Signed-off-by: Luca Stefani <luca@osomprivacy.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20221222131049.286288-1-luca@osomprivacy.com

In commit 76d62f24 ("pstore: Switch pmsg_lock to an rt_mutex
to avoid priority inversion") I changed a lock to an rt_mutex.

However, its possible that CONFIG_RT_MUTEXES is not enabled,
which then results in a build failure, as the 0day bot detected:
  https://lore.kernel.org/linux-mm/202212211244.TwzWZD3H-lkp@intel.com/

Thus this patch changes CONFIG_PSTORE_PMSG to select
CONFIG_RT_MUTEXES, which ensures the build will not fail.

Cc: Wei Wang <wvw@google.com>
Cc: Midas Chien<midaschieh@google.com>
Cc: Connor O'Brien <connoro@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Anton Vorontsov <anton@enomsg.org>
Cc: Colin Cross <ccross@android.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: kernel test robot <lkp@intel.com>
Cc: kernel-team@android.com
Fixes: 76d62f24

 ("pstore: Switch pmsg_lock to an rt_mutex to avoid priority inversion")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: John Stultz <jstultz@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20221221051855.15761-1-jstultz@google.com

When CFI_CLANG and KASAN are both enabled, LLVM doesn't generate a
CFI type hash for asan.module_ctor functions in translation units
where CFI is disabled, which leads to a CFI failure during boot when
do_ctors calls the affected constructors:

  CFI failure at do_basic_setup+0x64/0x90 (target:
  asan.module_ctor+0x0/0x28; expected type: 0xa540670c)

Specifically, this happens because CFI is disabled for
kernel/cfi.c. There's no reason to keep CFI disabled here anymore, so
fix the failure by not filtering out CC_FLAGS_CFI for the file.

Note that https://reviews.llvm.org/rG3b14862f0a96 fixed the issue
where LLVM didn't emit CFI type hashes for any sanitizer constructors,
but now type hashes are emitted correctly for TUs that use CFI.

Link: https://github.com/ClangBuiltLinux/linux/issues/1742
Fixes: 89245600

 ("cfi: Switch to -fsanitize=kcfi")
Reported-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20221222225747.3538676-1-samitolvanen@google.com

Pull more SCSI updates from James Bottomley:
 "Mostly small bug fixes and small updates.

  The only things of note is a qla2xxx fix for crash on hotplug and
  timeout and the addition of a user exposed abstraction layer for
  persistent reservation error return handling (which necessitates the
  conversion of nvme.c as well as SCSI)"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: qla2xxx: Fix crash when I/O abort times out
  nvme: Convert NVMe errors to PR errors
  scsi: sd: Convert SCSI errors to PR errors
  scsi: core: Rename status_byte to sg_status_byte
  block: Add error codes for common PR failures
  scsi: sd: sd_zbc: Trace zone append emulation
  scsi: libfc: Include the correct header

Pull afs update from David Howells:
 "A fix for a couple of missing resource counter decrements, two small
  cleanups of now-unused bits of code and a patch to remove writepage
  support from afs"

* tag 'afs-next-20221222' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  afs: Stop implementing ->writepage()
  afs: remove afs_cache_netfs and afs_zap_permits() declarations
  afs: remove variable nr_servers
  afs: Fix lost servers_outstanding count

Merge tag 'perf-tools-for-v6.2-2-2022-12-22' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux

Pull more perf tools updates from Arnaldo Carvalho de Melo:
 "perf tools fixes and improvements:

   - Don't stop building perf if python setuptools isn't installed, just
     disable the affected perf feature.

   - Remove explicit reference to python 2.x devel files, that warning
     is about python-devel, no matter what version, being unavailable
     and thus disabling the linking with libpython.

   - Don't use -Werror=switch-enum when building the python support that
     handles libtraceevent enumerations, as there is no good way to test
     if some specific enum entry is available with the libtraceevent
     installed on the system.

   - Introduce 'perf lock contention' --type-filter and --lock-filter,
     to filter by lock type and lock name:

        $ sudo ./perf lock record -a -- ./perf bench sched messaging

        $ sudo ./perf lock contention -E 5 -Y spinlock
         contended  total wait   max wait  avg wait      type  caller

               802     1.26 ms   11.73 us   1.58 us  spinlock  __wake_up_common_lock+0x62
                13   787.16 us  105.44 us  60.55 us  spinlock  remove_wait_queue+0x14
                12   612.96 us   78.70 us  51.08 us  spinlock  prepare_to_wait+0x27
               114   340.68 us   12.61 us   2.99 us  spinlock  try_to_wake_up+0x1f5
                83   226.38 us    9.15 us   2.73 us  spinlock  folio_lruvec_lock_irqsave+0x5e

        $ sudo ./perf lock contention -l
         contended  total wait  max wait  avg wait           address  symbol

                57     1.11 ms  42.83 us  19.54 us  ffff9f4140059000
                15   280.88 us  23.51 us  18.73 us  ffffffff9d007a40  jiffies_lock
                 1    20.49 us  20.49 us  20.49 us  ffffffff9d0d50c0  rcu_state
                 1     9.02 us   9.02 us   9.02 us  ffff9f41759e9ba0

        $ sudo ./perf lock contention -L jiffies_lock,rcu_state
         contended  total wait  max wait  avg wait      type  caller

                15   280.88 us  23.51 us  18.73 us  spinlock  tick_sched_do_timer+0x93
                 1    20.49 us  20.49 us  20.49 us  spinlock  __softirqentry_text_start+0xeb

        $ sudo ./perf lock contention -L ffff9f4140059000
         contended  total wait  max wait  avg wait      type  caller

                38   779.40 us  42.83 us  20.51 us  spinlock  worker_thread+0x50
                11   216.30 us  39.87 us  19.66 us  spinlock  queue_work_on+0x39
                 8   118.13 us  20.51 us  14.77 us  spinlock  kthread+0xe5

   - Fix splitting CC into compiler and options when checking if a
     option is present in clang to build the python binding, needed in
     systems such as yocto that set CC to, e.g.: "gcc --sysroot=/a/b/c".

   - Refresh metris and events for Intel systems: alderlake.
     alderlake-n, bonnell, broadwell, broadwellde, broadwellx,
     cascadelakex, elkhartlake, goldmont, goldmontplus, haswell,
     haswellx, icelake, icelakex, ivybridge, ivytown, jaketown,
     knightslanding, meteorlake, nehalemep, nehalemex, sandybridge,
     sapphirerapids, silvermont, skylake, skylakex, snowridgex,
     tigerlake, westmereep-dp, westmereep-sp, westmereex.

   - Add vendor events files (JSON) for AMD Zen 4, from sections
     2.1.15.4 "Core Performance Monitor Counters", 2.1.15.5 "L3 Cache
     Performance Monitor Counter"s and Section 7.1 "Fabric Performance
     Monitor Counter (PMC) Events" in the Processor Programming
     Reference (PPR) for AMD Family 19h Model 11h Revision B1
     processors.

     This constitutes events which capture op dispatch, execution and
     retirement, branch prediction, L1 and L2 cache activity, TLB
     activity, L3 cache activity and data bandwidth for various links
     and interfaces in the Data Fabric.

   - Also, from the same PPR are metrics taken from Section 2.1.15.2
     "Performance Measurement", including pipeline utilization, which
     are new to Zen 4 processors and useful for finding performance
     bottlenecks by analyzing activity at different stages of the
     pipeline.

   - Greatly improve the 'srcline', 'srcline_from', 'srcline_to' and
     'srcfile' sort keys performance by postponing calling the external
     addr2line utility to the collapse phase of histogram bucketing.

   - Fix 'perf test' "all PMU test" to skip parametrized events, that
     requires setting up and are not supported by this test.

   - Update tools/ copies of kernel headers: features,
     disabled-features, fscrypt.h, i915_drm.h, msr-index.h, power pc
     syscall table and kvm.h.

   - Add .DELETE_ON_ERROR special Makefile target to clean up partially
     updated files on error.

   - Simplify the mksyscalltbl script for arm64 by avoiding to run the
     host compiler to create the syscall table, do it all just with the
     shell script.

   - Further fixes to honour quiet mode (-q)"

* tag 'perf-tools-for-v6.2-2-2022-12-22' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: (67 commits)
  perf python: Fix splitting CC into compiler and options
  perf scripting python: Don't be strict at handling libtraceevent enumerations
  perf arm64: Simplify mksyscalltbl
  perf build: Remove explicit reference to python 2.x devel files
  perf vendor events amd: Add Zen 4 mapping
  perf vendor events amd: Add Zen 4 metrics
  perf vendor events amd: Add Zen 4 uncore events
  perf vendor events amd: Add Zen 4 core events
  perf vendor events intel: Refresh westmereex events
  perf vendor events intel: Refresh westmereep-sp events
  perf vendor events intel: Refresh westmereep-dp events
  perf vendor events intel: Refresh tigerlake metrics and events
  perf vendor events intel: Refresh snowridgex events
  perf vendor events intel: Refresh skylakex metrics and events
  perf vendor events intel: Refresh skylake metrics and events
  perf vendor events intel: Refresh silvermont events
  perf vendor events intel: Refresh sapphirerapids metrics and events
  perf vendor events intel: Refresh sandybridge metrics and events
  perf vendor events intel: Refresh nehalemex events
  perf vendor events intel: Refresh nehalemep events
  ...

Noticed this build failure on archlinux:base when building with clang:

  clang-14: error: optimization flag '-ffat-lto-objects' is not supported [-Werror,-Wignored-optimization-argument]

In tools/perf/util/setup.py we check if clang supports that option, but
since commit 3cad53a6 ("perf python: Account for multiple words
in CC") this got broken as in the common case where CC="clang":

  >>> cc="clang"
  >>> print(cc.split()[0])
  clang
  >>> option="-ffat-lto-objects"
  >>> print(str(cc.split()[1:]) + option)
  []-ffat-lto-objects
  >>>

And then the Popen will call clang with that bogus option name that in
turn will not produce the b"unknown argument" or b"is not supported"
that this function uses to detect if the option is not available and
thus later on clang will be called with an unknown/unsupported option.

Fix it by looking if really there are options in the provided CC
variable, and if so override 'cc' with the first token and append the
options to the 'option' variable.

Fixes: 3cad53a6 ("perf python: Account for multiple words in CC")
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Fangrui Song <maskray@google.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Keeping <john@metanate.com>
Cc: Khem Raj <raj.khem@gmail.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Link: http://lore.kernel.org/lkml/Y6Rq5F5NI0v1QQHM@kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

We're trying to get rid of the ->writepage() hook[1].  Stop afs from using
it by unlocking the page and calling afs_writepages_region() rather than
folio_write_one().

A flag is passed to afs_writepages_region() to indicate that it should only
write a single region so that we don't flush the entire file in
->write_begin(), but do add other dirty data to the region being written to
try and reduce the number of RPC ops.

This requires ->migrate_folio() to be implemented, so point that at
filemap_migrate_folio() for files and also for symlinks and directories.

This can be tested by turning on the afs_folio_dirty tracepoint and then
doing something like:

   xfs_io -c "w 2223 7000" -c "w 15000 22222" -c "w 23 7" /afs/my/test/foo

and then looking in the trace to see if the write at position 15000 gets
stored before page 0 gets dirtied for the write at position 23.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Christoph Hellwig <hch@lst.de>
cc: Matthew Wilcox <willy@infradead.org>
cc: linux-afs@lists.infradead.org
Link: https://lore.kernel.org/r/20221113162902.883850-1-hch@lst.de/ [1]
Link: https://lore.kernel.org/r/166876785552.222254.4403222906022558715.stgit@warthog.procyon.org.uk/ # v1

afs_zap_permits() has been removed since
commit be080a6f ("afs: Overhaul permit caching").

afs_cache_netfs has been removed since
commit 523d27cd

 ("afs: Convert afs to use the new fscache API").

so remove the declare for them from header file.

Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Link: https://lore.kernel.org/r/20220909070353.1160228-1-cuigaosheng1@huawei.com/

Variable nr_servers is no longer being used, the last reference
to it was removed in commit 45df8462

 ("afs: Fix server list handling")
so clean up the code by removing it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Link: https://lore.kernel.org/r/20221020173923.21342-1-colin.i.king@gmail.com/

The afs_fs_probe_dispatcher() work function is passed a count on
net->servers_outstanding when it is scheduled (which may come via its
timer).  This is passed back to the work_item, passed to the timer or
dropped at the end of the dispatcher function.

But, at the top of the dispatcher function, there are two checks which
skip the rest of the function: if the network namespace is being destroyed
or if there are no fileservers to probe.  These two return paths, however,
do not drop the count passed to the dispatcher, and so, sometimes, the
destruction of a network namespace, such as induced by rmmod of the kafs
module, may get stuck in afs_purge_servers(), waiting for
net->servers_outstanding to become zero.

Fix this by adding the missing decrements in afs_fs_probe_dispatcher().

Fixes: f6cbb368

 ("afs: Actively poll fileservers to maintain NAT or firewall openings")
Reported-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Link: https://lore.kernel.org/r/167164544917.2072364.3759519569649459359.stgit@warthog.procyon.org.uk/

Merge tag 'asoc-v6.2-3' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Updates for v6.2

Some more small fixes and board quirks that came in since my last
update, the main one being the fixes from Kai for issues around the
attempts to get kexec working well on SOF based systems.

It seems that the firmware is broken and does not accept
the UAC_EP_CS_ATTR_SAMPLE_RATE URB. There is only one rate (48000Hz)
available in the descriptors for the output endpoint.

Create a new quirk QUIRK_FLAG_FIXED_RATE to skip the rate setup
when only one rate is available (fixed).

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=216798


Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20221215153037.1163786-1-perex@perex.cz


Signed-off-by: Takashi Iwai <tiwai@suse.de>

The function snd_azf3328_codec_outl is defined in the azt3328.c file, but
not called elsewhere, so remove this unused function.

sound/pci/azt3328.c:367:1: warning: unused function 'snd_azf3328_codec_outl'.

Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=3432


Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Link: https://lore.kernel.org/r/20221213061355.62856-1-jiapeng.chong@linux.alibaba.com


Signed-off-by: Takashi Iwai <tiwai@suse.de>