The resource-managed devm_regmap_init() can be a bit simpler by using
devm_add_action_or_reset() instead of devres_alloc(). This allows to
drop the less-obvious pointer to pointer (struct regmap **ptr) and make
devm_regmap_release() interface simpler.
Code is functionally equivalent with minor difference: devres_alloc()
will happen now after successful resource init (__regmap_init()).
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260305201349.32734-2-krzysztof.kozlowski@oss.qualcomm.com
Signed-off-by: Mark Brown <broonie@kernel.org>
As of v7.0-rc1, architectures that support preemption, including x86 and
arm64, no longer support CONFIG_PREEMPT_NONE or CONFIG_PREEMPT_VOLUNTARY.
Attempting to build kernels with these two Kconfig options results in
.config errors. This commit therefore switches such scftorture scenarios
to CONFIG_PREEMPT_LAZY.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Boqun Feng <boqun@kernel.org>
Link: https://patch.msgid.link/20260303235903.1967409-4-paulmck@kernel.org
As of v7.0-rc1, architectures that support preemption, including x86 and
arm64, no longer support CONFIG_PREEMPT_NONE or CONFIG_PREEMPT_VOLUNTARY.
Attempting to build kernels with these two Kconfig options results in
.config errors. This commit therefore switches such refscale scenarios
to CONFIG_PREEMPT_LAZY.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Boqun Feng <boqun@kernel.org>
Link: https://patch.msgid.link/20260303235903.1967409-3-paulmck@kernel.org
As of v7.0-rc1, architectures that support preemption, including x86 and
arm64, no longer support CONFIG_PREEMPT_NONE or CONFIG_PREEMPT_VOLUNTARY.
Attempting to build kernels with these two Kconfig options results in
.config errors. This commit therefore switches such rcuscale scenarios
to CONFIG_PREEMPT_LAZY.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Boqun Feng <boqun@kernel.org>
Link: https://patch.msgid.link/20260303235903.1967409-2-paulmck@kernel.org
As of v7.0-rc1, architectures that support preemption, including x86 and
arm64, no longer support CONFIG_PREEMPT_NONE or CONFIG_PREEMPT_VOLUNTARY.
Attempting to build kernels with these two Kconfig options results in
.config errors. This commit therefore switches such rcutorture scenarios
to CONFIG_PREEMPT_LAZY.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Boqun Feng <boqun@kernel.org>
Link: https://patch.msgid.link/bfe89f6c-3b63-40c6-aa6d-5f523e3e9a31@paulmck-laptop
To get the comment changes in this commit:
171efc7009 ("x86/ibs: Fix typo in dc_l2tlb_miss comment")
This silences this perf build warning:
Warning: Kernel ABI header differences:
diff -u tools/arch/x86/include/asm/amd/ibs.h arch/x86/include/asm/amd/ibs.h
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Intel sometimes has CPUs with identical family/model/stepping but
which need different microcode. These CPUs are differentiated with the
platform ID.
The Intel "microcode-20250512" release was used to generate the
existing contents of intel-ucode-defs.h. Use that same release and add
the platform mask to the definitions.
This makes the list a few entries longer because some CPUs previously
that shared a definition now need two or more. for example for the
ancient Pentium III there are two CPUs that differ only in their
platform and have two different microcode versions (note:
.driver_data is the microcode version):
{ ..., .model = 0x05, .steppings = 0x0001, .platform_mask = 0x01, .driver_data = 0x40 },
{ ..., .model = 0x05, .steppings = 0x0001, .platform_mask = 0x08, .driver_data = 0x45 },
Another example is the state-of-the-art Granite Rapids:
{ ..., .model = 0xad, .steppings = 0x0002, .platform_mask = 0x20, .driver_data = 0xa0000d1 },
{ ..., .model = 0xad, .steppings = 0x0002, .platform_mask = 0x95, .driver_data = 0x10003a2 },
As you can see, this differentiation with platform ID has been
necessary for a long time and is still relevant today.
Without the platform matching, the old microcode table is incomplete.
For instance, it might lead someone with a Pentium III, platform 0x0,
and microcode 0x40 to think that they should have microcode 0x45,
which is really only for platform 0x4 (.platform_mask==0x08).
In practice, this meant that folks with fully updated microcode were
seeing "Vulnerable" in the "old_microcode" file.
1. https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files
Closes: https://lore.kernel.org/all/38660F8F-499E-48CD-B58B-4822228A5941@nutanix.com/
Fixes: 4e2c719782 ("x86/cpu: Help users notice when running old Intel microcode")
Reported-by: Jon Kohler <jon@nutanix.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Sohil Mehta <sohil.mehta@intel.com>
Tested-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/all/3ECBB974-C6F0-47A7-94B6-3646347F1CC2@nutanix.com/
Link: https://patch.msgid.link/20260304181024.76E3F038@davehans-spike.ostc.intel.com
The existing x86_match_cpu() infrastructure can be used to match
a bunch of attributes of a CPU: vendor, family, model, steppings
and CPU features.
But, there's one more attribute that's missing and unable to be
matched against: the platform ID, enumerated on Intel CPUs in
MSR_IA32_PLATFORM_ID. It is a little more obscure and is only
queried during microcode loading. This is because Intel sometimes
has CPUs with identical family/model/stepping but which need
different microcode. These CPUs are differentiated with the
platform ID.
Add a field in 'struct x86_cpu_id' for the platform ID. Similar
to the stepping field, make the new field a mask of platform IDs.
Some examples:
0x01: matches only platform ID 0x0
0x02: matches only platform ID 0x1
0x03: matches platform IDs 0x0 or 0x1
0x80: matches only platform ID 0x7
0xff: matches all 8 possible platform IDs
Since the mask is only a byte wide, it nestles in next to another
u8 and does not even increase the size of 'struct x86_cpu_id'.
Reserve the all 0's value as the wildcard (X86_PLATFORM_ANY). This
avoids forcing changes to existing 'struct x86_cpu_id' users. They
can just continue to fill the field with 0's and their matching will
work exactly as before.
Note: If someone is ever looking for space in 'struct x86_cpu_id',
this new field could probably get stuck over in ->driver_data
for the one user that there is.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Sohil Mehta <sohil.mehta@intel.com>
Link: https://patch.msgid.link/20260304181022.058DF07C@davehans-spike.ostc.intel.com
The end goal here is to be able to do x86_match_cpu() and match on a
specific platform ID. While it would be possible to stash this ID
off somewhere or read it dynamically, that approaches would not be
consistent with the other fields which can be matched.
Read the platform ID and store it in cpuinfo_x86.
There are lots of sites to set this new field. Place it near
the place c->microcode is established since the platform ID is
so closely intertwined with microcode updates.
Note: This should not grow the size of 'struct cpuinfo_x86' in
practice since the u8 fits next to another u8 in the structure.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Sohil Mehta <sohil.mehta@intel.com>
Reviewed-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Link: https://patch.msgid.link/20260304181020.8D518228@davehans-spike.ostc.intel.com
Today, the only code that cares about the platform ID is the microcode
update code itself. To facilitate storing the platform ID in a more
generic place and using it outside of the microcode update itself, put
the enumeration into a helper function. Mirror
intel_get_microcode_revision()'s naming and location.
But, moving away from intel_collect_cpu_info() means that the model
and family information in CPUID is not readily available. Just call
CPUID again.
Note that the microcode header is a mask of supported platform IDs.
Only stick the ID part in the helper. Leave the 1<<id part in the
microcode handling.
Also note that the PII is weird. It does not really have a platform
ID because it doesn't even have the MSR. Just consider it to be
platform ID 0. Instead of saying >=PII, say <=PII. The PII is the
real oddball here being the only CPU with Linux microcode updates
but no platform ID. It's worth calling it out by name.
This does subtly change the sig->pf for the PII though from 0x0
to 0x1. Make up for that by ignoring sig->pf when the microcode
update platform mask is 0x0.
[ dhansen: reflow comment for bpetkov ]
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Sohil Mehta <sohil.mehta@intel.com>
Reviewed-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Link: https://patch.msgid.link/20260304181018.EB6404F8@davehans-spike.ostc.intel.com
Picking up the changes from these csets:
2153b2e891 ("sparc: Add architecture support for clone3")
99d2592023 ("rseq: Implement sys_rseq_slice_yield()")
4ac286c4a8 ("s390/syscalls: Switch to generic system call table generation")
This makes 'perf trace' support it, now its possible, for instance, to
do:
# perf trace -e rseq_slice_yield --max-stack=16
Here is an example with the 'sendmmsg' syscall:
root@x1:~# perf trace -e sendmmsg --max-stack 16 --max-events=1
0.000 ( 0.062 ms): dbus-broker/1012 sendmmsg(fd: 150, mmsg: 0x7ffef57cca50, vlen: 1, flags: DONTWAIT|NOSIGNAL) = 1
syscall_exit_to_user_mode_prepare ([kernel.kallsyms])
syscall_exit_to_user_mode_prepare ([kernel.kallsyms])
syscall_exit_to_user_mode ([kernel.kallsyms])
do_syscall_64 ([kernel.kallsyms])
entry_SYSCALL_64 ([kernel.kallsyms])
[0x117ce7] (/usr/lib64/libc.so.6 (deleted))
root@x1:~#
To do a system wide tracing of the new 'rseq_slice_yield' syscall with a
backtrace of at most 16 entries.
This addresses these perf tools build warnings:
Warning: Kernel ABI header differences:
diff -u tools/include/uapi/asm-generic/unistd.h include/uapi/asm-generic/unistd.h
diff -u tools/scripts/syscall.tbl scripts/syscall.tbl
diff -u tools/perf/arch/x86/entry/syscalls/syscall_32.tbl arch/x86/entry/syscalls/syscall_32.tbl
diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl
diff -u tools/perf/arch/powerpc/entry/syscalls/syscall.tbl arch/powerpc/kernel/syscalls/syscall.tbl
diff -u tools/perf/arch/s390/entry/syscalls/syscall.tbl arch/s390/kernel/syscalls/syscall.tbl
diff -u tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl arch/mips/kernel/syscalls/syscall_n64.tbl
diff -u tools/perf/arch/arm/entry/syscalls/syscall.tbl arch/arm/tools/syscall.tbl
diff -u tools/perf/arch/sh/entry/syscalls/syscall.tbl arch/sh/kernel/syscalls/syscall.tbl
diff -u tools/perf/arch/sparc/entry/syscalls/syscall.tbl arch/sparc/kernel/syscalls/syscall.tbl
diff -u tools/perf/arch/xtensa/entry/syscalls/syscall.tbl arch/xtensa/kernel/syscalls/syscall.tbl
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Ludwig Rydberg <ludwig.rydberg@gaisler.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cross-merge networking fixes after downstream PR (net-7.0-rc3).
No conflicts.
Adjacent changes:
net/netfilter/nft_set_rbtree.c
fb7fb40163 ("netfilter: nf_tables: clone set on flush only")
3aea466a43 ("netfilter: nft_set_rbtree: don't disable bh when acquiring tree lock")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
CONFIG_RANDOMIZE_IDENTITY_BASE only enables support for randomizing the
identity mapping base. The randomization (identity base != 0) itself
should happen only when KASLR is enabled at runtime.
Guard the __identity_base update with kaslr_enabled() so nokaslr (and
other KASLR-disabled cases) keep the non-randomized identity mapping at 0.
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
The modules sanity test must be built as a module to actually exercise
module loading. Require KUNIT && m to prevent built-in builds and avoid
misuse, so it is either 'n' or 'm'.
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
ident_map_size is no longer a standalone variable and the declaration
in asm/setup.h conflicts with its current definition in asm/page.h
introduced with commit 236f324b74 ("s390/mm: Create virtual memory
layout structure"). Remove the stale declaration.
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Prevent CONFIG_FS_VERITY from being enabled when the page size is 256K,
since it doesn't work in that case.
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Merge tag 'fsverity-for-linus' of git://git.kernel.org/pub/scm/fs/fsverity/linux
Pull fsverity fix from Eric Biggers:
"Prevent CONFIG_FS_VERITY from being enabled when the page size is
256K, since it doesn't work in that case"
* tag 'fsverity-for-linus' of git://git.kernel.org/pub/scm/fs/fsverity/linux:
fsverity: add dependency on 64K or smaller pages
If a branch target points to one past the end of a function, the branch
should be treated as a branch to another function.
This can happen e.g. with a tail call to a function that is laid out
immediately after the caller.
Fixes: 751b1783da ("perf annotate: Mark jumps to outher functions with the call arrow")
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Peter Collingbourne <pcc@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Bill Wendling <morbo@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Justin Stitt <justinstitt@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://linux-review.googlesource.com/id/Ide471112e82d68177e0faf08ca411d9fcf0a7bdf
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Remove snd_usb_get_string() and use the manufacturer and product strings
stored in struct usb_device directly to match quirk table entries. Their
NULLity can be checked to determine if the device has no these strings.
This simplifies the code a lot.
Meanwhile, allow quirk table entries to match "no string" explicitly, and
add appropriate comments to show the expected usages of
DEVICE_STRING_FLG() and VENDOR_STRING_FLG(). These changes are tiny and
doesn't form another separate patch, so that back-and-forth changes can
be avoided.
Suggested-by: Terry Junge <linuxsound@cosmicgizmosystems.com>
Link: https://lore.kernel.org/r/b59da54a-9c80-4212-a337-c5ea98da52d1@cosmicgizmosystems.com
Signed-off-by: Rong Zhang <i@rong.moe>
Link: https://patch.msgid.link/20260305174711.1106324-1-i@rong.moe
Signed-off-by: Takashi Iwai <tiwai@suse.de>
- Several test fixes:
- Fix flakiness in the interrupt context tests in certain VMs.
- Make the lib/crypto/ KUnit tests depend on the corresponding
library options rather than selecting them. This follows the
standard KUnit convention, and it fixes an issue where enabling
CONFIG_KUNIT_ALL_TESTS pulled in all the crypto library code.
- Add a kunitconfig file for lib/crypto/.
- Fix a couple stale references to "aes-generic" that made it in
concurrently with the rename to "aes-lib".
- Update the help text for several CRYPTO kconfig options to remove
outdated information about users that now use the library instead.
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Merge tag 'libcrypto-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux
Pull crypto library fixes from Eric Biggers:
- Several test fixes:
- Fix flakiness in the interrupt context tests in certain VMs
- Make the lib/crypto/ KUnit tests depend on the corresponding
library options rather than selecting them. This follows the
standard KUnit convention, and it fixes an issue where enabling
CONFIG_KUNIT_ALL_TESTS pulled in all the crypto library code
- Add a kunitconfig file for lib/crypto/
- Fix a couple stale references to "aes-generic" that made it in
concurrently with the rename to "aes-lib"
- Update the help text for several CRYPTO kconfig options to remove
outdated information about users that now use the library instead
* tag 'libcrypto-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux:
crypto: testmgr - Fix stale references to aes-generic
crypto: Clean up help text for CRYPTO_CRC32
crypto: Clean up help text for CRYPTO_CRC32C
crypto: Clean up help text for CRYPTO_XXHASH
crypto: Clean up help text for CRYPTO_SHA256
crypto: Clean up help text for CRYPTO_BLAKE2B
lib/crypto: tests: Add a .kunitconfig file
lib/crypto: tests: Depend on library options rather than selecting them
kunit: irq: Ensure timer doesn't fire too frequently
- Revert a commit related to ACPI device power management that was
not supposed to make any functional difference, but it did so and
introduced a regression (Rafael Wysocki)
- Update the _CPC object definition in ACPICA to match ACPI 6.6 and
prevent the kernel from printing a false-positive warning regarding
_CPC output package format on platforms shipping with firmware based
on ACPI 6.6 (Saket Dumbre)
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Merge tag 'acpi-7.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI support fixes from Rafael Wysocki:
- Revert a commit related to ACPI device power management that was
not supposed to make any functional difference, but it did so and
introduced a regression (Rafael Wysocki)
- Update the _CPC object definition in ACPICA to match ACPI 6.6 and
prevent the kernel from printing a false-positive warning regarding
_CPC output package format on platforms shipping with firmware based
on ACPI 6.6 (Saket Dumbre)
* tag 'acpi-7.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
Revert "ACPI: PM: Let acpi_dev_pm_attach() skip devices without ACPI PM"
ACPICA: Update the _CPC definition to match ACPI 6.6
Current release - new code bugs:
- sched: cake: fixup cake_mq rate adjustment for diffserv config
- wifi: fix missing ieee80211_eml_params member initialization
Previous releases - regressions:
- tcp: give up on stronger sk_rcvbuf checks (for now)
Previous releases - always broken:
- net: fix rcu_tasks stall in threaded busypoll
- sched: fq: clear q->band_pkt_count[] in fq_reset()
- sched: only allow act_ct to bind to clsact/ingress qdiscs and
shared blocks
- bridge: check relevant per-VLAN options in VLAN range grouping
- xsk: fix fragment node deletion to prevent buffer leak
Misc:
- spring cleanup of inactive maintainers
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-7.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Including fixes from CAN, netfilter and wireless.
Current release - new code bugs:
- sched: cake: fixup cake_mq rate adjustment for diffserv config
- wifi: fix missing ieee80211_eml_params member initialization
Previous releases - regressions:
- tcp: give up on stronger sk_rcvbuf checks (for now)
Previous releases - always broken:
- net: fix rcu_tasks stall in threaded busypoll
- sched:
- fq: clear q->band_pkt_count[] in fq_reset()
- only allow act_ct to bind to clsact/ingress qdiscs and shared
blocks
- bridge: check relevant per-VLAN options in VLAN range grouping
- xsk: fix fragment node deletion to prevent buffer leak
Misc:
- spring cleanup of inactive maintainers"
* tag 'net-7.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (138 commits)
xdp: produce a warning when calculated tailroom is negative
net: enetc: use truesize as XDP RxQ info frag_size
libeth, idpf: use truesize as XDP RxQ info frag_size
i40e: use xdp.frame_sz as XDP RxQ info frag_size
i40e: fix registering XDP RxQ info
ice: change XDP RxQ frag_size from DMA write length to xdp.frame_sz
ice: fix rxq info registering in mbuf packets
xsk: introduce helper to determine rxq->frag_size
xdp: use modulo operation to calculate XDP frag tailroom
selftests/tc-testing: Add tests exercising act_ife metalist replace behaviour
net/sched: act_ife: Fix metalist update behavior
selftests: net: add test for IPv4 route with loopback IPv6 nexthop
net: ipv6: fix panic when IPv4 route references loopback IPv6 nexthop
net: vxlan: fix nd_tbl NULL dereference when IPv6 is disabled
net: bridge: fix nd_tbl NULL dereference when IPv6 is disabled
MAINTAINERS: remove Thomas Falcon from IBM ibmvnic
MAINTAINERS: remove Claudiu Manoil and Alexandre Belloni from Ocelot switch
MAINTAINERS: replace Taras Chornyi with Elad Nachman for Marvell Prestera
MAINTAINERS: remove Jonathan Lemon from OpenCompute PTP
MAINTAINERS: replace Clark Wang with Frank Li for Freescale FEC
...
Currently, the `Reference Performance` register is read every time
the CPU frequency is sampled in `cppc_get_perf_ctrs()`. This function
is on the hot path of the cppc_cpufreq driver.
Reference Performance indicates the performance level that corresponds
to the Reference Counter incrementing and is not expected to change
dynamically during runtime (unlike the Delivered and Reference counters).
Reading this register in the hot path incurs unnecessary overhead,
particularly on platforms where CPC registers are located in the PCC
(Platform Communication Channel) subspace. This patch moves
`reference_perf` from the dynamic feedback counters structure
(`cppc_perf_fb_ctrs`) to the static capabilities structure
(`cppc_perf_caps`).
Signed-off-by: Pengjie Zhang <zhangpengjie2@huawei.com>
[ rjw: Changelog adjustment ]
Link: https://patch.msgid.link/20260213100935.19111-1-zhangpengjie2@huawei.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Currently if a user enqueue a work item using schedule_delayed_work() the
used wq is "system_wq" (per-cpu wq) while queue_delayed_work() use
WORK_CPU_UNBOUND (used when a cpu is not specified). The same applies to
schedule_work() that is using system_wq and queue_work(), that makes use
again of WORK_CPU_UNBOUND.
This lack of consistentcy cannot be addressed without refactoring the API.
alloc_workqueue() treats all queues as per-CPU by default, while unbound
workqueues must opt-in via WQ_UNBOUND.
This default is suboptimal: most workloads benefit from unbound queues,
allowing the scheduler to place worker threads where they’re needed and
reducing noise when CPUs are isolated.
This change adds a new WQ_PERCPU flag to explicitly request
alloc_workqueue() to be per-cpu when WQ_UNBOUND has not been specified.
With the introduction of the WQ_PERCPU flag (equivalent to !WQ_UNBOUND),
any alloc_workqueue() caller that doesn’t explicitly specify WQ_UNBOUND
must now use WQ_PERCPU.
This patch continues the effort to refactor worqueue APIs, which has
begun with the change introducing new workqueues:
commit 930c2ea566 ("workqueue: Add new WQ_PERCPU flag")
Once migration is complete, WQ_UNBOUND can be removed and unbound will
become the implicit default.
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Reviewed-by: Krzysztof Karas <krzysztof.karas@intel.com>
Link: https://patch.msgid.link/20251104100032.61525-4-marco.crivellari@suse.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Currently if a user enqueue a work item using schedule_delayed_work() the
used wq is "system_wq" (per-cpu wq) while queue_delayed_work() use
WORK_CPU_UNBOUND (used when a cpu is not specified). The same applies to
schedule_work() that is using system_wq and queue_work(), that makes use
again of WORK_CPU_UNBOUND.
This lack of consistency cannot be addressed without refactoring the API.
system_wq should be the per-cpu workqueue, yet in this name nothing makes
that clear, so replace system_wq with system_percpu_wq.
This patch continues the effort to refactor worqueue APIs, which has
begun with the change introducing new workqueues:
commit 128ea9f6cc ("workqueue: Add system_percpu_wq and system_dfl_wq")
The old wq (system_wq) will be kept for a few release cycles.
This change only update the documentation of drm/i915.
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Reviewed-by: Krzysztof Karas <krzysztof.karas@intel.com>
Link: https://patch.msgid.link/20251104100032.61525-3-marco.crivellari@suse.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Currently if a user enqueue a work item using schedule_delayed_work() the
used wq is "system_wq" (per-cpu wq) while queue_delayed_work() use
WORK_CPU_UNBOUND (used when a cpu is not specified). The same applies to
schedule_work() that is using system_wq and queue_work(), that makes use
again of WORK_CPU_UNBOUND.
This lack of consistency cannot be addressed without refactoring the API.
system_unbound_wq should be the default workqueue so as not to enforce
locality constraints for random work whenever it's not required.
This patch continues the effort to refactor worqueue APIs, which has
begun with the change introducing new workqueues:
commit 128ea9f6cc ("workqueue: Add system_percpu_wq and system_dfl_wq")
The old system_unbound_wq will be kept for a few release cycles.
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Reviewed-by: Krzysztof Karas <krzysztof.karas@intel.com>
Link: https://patch.msgid.link/20251104100032.61525-2-marco.crivellari@suse.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Merge a fix updating the _CPC object definition in ACPICA to avoid
printing a false-positive output package format warning on new
platforms (Saket Dumbre)
* acpica:
ACPICA: Update the _CPC definition to match ACPI 6.6
Email to Joyce Ooi <joyce.ooi@intel.com> now bounces. Remove the address
and mark the Altera PCIe controller driver as an orphan for now.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20260305171852.3114177-1-dave.hansen@linux.intel.com
Add a sample module under samples/workqueue/stall_detector/ that
reproduces a workqueue stall caused by PF_WQ_WORKER misuse. The
module queues two work items on the same per-CPU pool, then clears
PF_WQ_WORKER and sleeps in wait_event_idle(), hiding from the
concurrency manager and stalling the second work item indefinitely.
This is useful for testing the workqueue watchdog stall diagnostics.
Signed-off-by: Breno Leitao <leitao@debian.org>
Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
show_cpu_pool_hog() only prints workers whose task is currently running
on the CPU (task_is_running()). This misses workers that are busy
processing a work item but are sleeping or blocked — for example, a
worker that clears PF_WQ_WORKER and enters wait_event_idle(). Such a
worker still occupies a pool slot and prevents progress, yet produces
an empty backtrace section in the watchdog output.
This is happening on real arm64 systems, where
toggle_allocation_gate() IPIs every single CPU in the machine (which
lacks NMI), causing workqueue stalls that show empty backtraces because
toggle_allocation_gate() is sleeping in wait_event_idle().
Remove the task_is_running() filter so every in-flight worker in the
pool's busy_hash is dumped. The busy_hash is protected by pool->lock,
which is already held.
Signed-off-by: Breno Leitao <leitao@debian.org>
Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
When diagnosing workqueue stalls, knowing how long each in-flight work
item has been executing is valuable. Add a current_start timestamp
(jiffies) to struct worker, set it when a work item begins execution in
process_one_work(), and print the elapsed wall-clock time in show_pwq().
Unlike current_at (which tracks CPU runtime and resets on wakeup for
CPU-intensive detection), current_start is never reset because the
diagnostic cares about total wall-clock time including sleeps.
Before: in-flight: 165:stall_work_fn [wq_stall]
After: in-flight: 165:stall_work_fn [wq_stall] for 100s
Signed-off-by: Breno Leitao <leitao@debian.org>
Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
The watchdog_ts name doesn't convey what the timestamp actually tracks.
This field tracks the last time a workqueue got progress.
Rename it to last_progress_ts to make it clear that it records when the
pool last made forward progress (started processing new work items).
No functional change.
Signed-off-by: Breno Leitao <leitao@debian.org>
Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
pr_cont_worker_id() checks pool->flags against WQ_BH, which is a
workqueue-level flag (defined in workqueue.h). Pool flags use a
separate namespace with POOL_* constants (defined in workqueue.c).
The correct constant is POOL_BH. Both WQ_BH and POOL_BH are defined
as (1 << 0) so this has no behavioral impact, but it is semantically
wrong and inconsistent with every other pool-level BH check in the
file.
Fixes: 4cb1ef6460 ("workqueue: Implement BH workqueues to eventually replace tasklets")
Signed-off-by: Breno Leitao <leitao@debian.org>
Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
The management channel used for firmware control command submission is
currently created after the firmware is started. If channel creation
fails (for example, due to memory allocation failure or workqueue
creation interruption), the firmware remains in a pending state and is
unable to receive any control commands.
To avoid leaving the firmware in this inconsistent state, split
xdna_mailbox_create_channel() into two separate functions so that
resource allocation can be completed before interacting with the
hardware.
xdna_mailbox_alloc_channel()
Allocates memory and initializes the workqueue. This can be called
earlier, before interacting with the hardware.
xdna_mailbox_start_channel()
Performs the hardware interaction required to start the channel.
Rename xdna_mailbox_destroy_channel() to xdna_mailbox_free_channel().
Ensure that xdna_mailbox_stop_channel() and xdna_mailbox_free_channel()
properly unwind the corresponding start and allocation steps, respectively.
Fixes: b87f920b93 ("accel/amdxdna: Support hardware mailbox")
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260305062041.3954024-1-lizhi.hou@amd.com
The devm_ioremap_resource_wc() function never returns NULL, it returns
error pointers. Update the error checking to match.
Fixes: 67a7bc7f03 ("remoteproc: Use of_reserved_mem_region_* functions for "memory-region"")
Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20260227092110.4044313-1-nichen@iscas.ac.cn
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
The devm_ioremap_resource_wc() function never returns NULL, it returns
error pointers. Update the error checking to match.
Fixes: 67a7bc7f03 ("remoteproc: Use of_reserved_mem_region_* functions for "memory-region"")
Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20260227091546.4044246-1-nichen@iscas.ac.cn
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Add remote processor PAS loader for Kaanapali CDSP processor, compatible
with earlier SM8550 with minor difference: one more sixth "shutdown-ack"
interrupt. It is not compatible with SM8650 because one memory region
"global_sync_mem" is not managed by kernel on Kaanapali so it is removed
in the remoteproc cdsp node.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Jingyi Wang <jingyi.wang@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260114-knp-remoteproc-v4-2-fcf0b04d01af@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Document compatible for Qualcomm Kaanapali SoC ADSP PAS which looks fully
compatible with SM8750, which can fallback to SM8550 except for one more
interrupt ("shutdown-ack").
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Jingyi Wang <jingyi.wang@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260114-knp-remoteproc-v4-1-fcf0b04d01af@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Add error checking for regmap_attach_dev() call in
imx_rproc_mmio_detect_mode() function to ensure proper error
propagation.
Return the value of regmap_attach_dev() if it fails to prevent
proceeding with an incomplete regmap setup.
Suggested-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Fixes: e14168bf34 ("remoteproc: imx_rproc: Simplify IMX_RPROC_MMIO switch case")
Link: https://lore.kernel.org/r/20260209051407.1467660-1-nichen@iscas.ac.cn
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Smatch reports unreachable code in imx_rproc_prepare(), where an early
return inside the reserved-memory parsing loop prevents platform
prepare_ops from being executed.
When of_reserved_mem_region_to_resource() fails, imx_rproc_prepare()
returns immediately, so the platform-specific prepare callback is never
called. As a result, prepare_ops such as imx_rproc_sm_lmm_prepare() on
i.MX95 have no chance to run.
This is problematic when Linux controls the M7 Logical Machine and is
responsible for preparing resources such as TCM. Without running the
platform prepare callback, loading the M7 ELF into TCM may fail if the
bootloader did not power up and initialize TCM.
Fix this by breaking out of the reserved-memory loop instead of
returning, allowing the platform prepare_ops to be executed as intended.
Fixes: edd2a99560 ("remoteproc: imx_rproc: Introduce prepare ops for imx_rproc_dcfg")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/linux-remoteproc/aYYXAa2Fj36XG4yQ@p14s/T/#t
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Link: https://lore.kernel.org/r/20260208-imx-rproc-fix-v1-1-ad74555eb9a4@nxp.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Prior to commit d935187cfb ("remoteproc: mediatek: Break lock
dependency to prepare_lock"), `scp->clk` was prepared and enabled only
when it needs to communicate with the SCP. The commit d935187cfb
moved the prepare operation to remoteproc's prepare(), keeping the clock
prepared as long as the SCP is running.
The power consumption due to the prolonged clock preparation can be
negligible when the system is running, as SCP is designed to be a very
power efficient processor.
However, the clock remains prepared even when the system enters system
suspend. This prevents the underlying clock controller (and potentially
the parent PLLs) from shutting down, which increases power consumption
and may block the system from entering deep sleep states.
Add suspend and resume callbacks. Unprepare the clock in suspend() if
it was active and re-prepare it in resume() to ensure the clock is
properly disabled during system suspend, while maintaining the "always
prepared" semantics while the system is active. The driver doesn't
implement .attach() callback, hence it only checks for RPROC_RUNNING.
Fixes: d935187cfb ("remoteproc: mediatek: Break lock dependency to prepare_lock")
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://lore.kernel.org/r/20260206033034.3031781-1-tzungbi@kernel.org
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
This patch continues the effort to refactor workqueue APIs, which has begun
with the changes introducing new workqueues and a new alloc_workqueue flag:
commit 128ea9f6cc ("workqueue: Add system_percpu_wq and system_dfl_wq")
commit 930c2ea566 ("workqueue: Add new WQ_PERCPU flag")
The point of the refactoring is to eventually alter the default behavior of
workqueues to become unbound by default so that their workload placement is
optimized by the scheduler.
Before that to happen after a careful review and conversion of each individual
case, workqueue users must be converted to the better named new workqueues with
no intended behaviour changes:
system_wq -> system_percpu_wq
system_unbound_wq -> system_dfl_wq
This way the old obsolete workqueues (system_wq, system_unbound_wq) can be
removed in the future.
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Message-ID: <20251224161301.135382-1-marco.crivellari@suse.com>
Signed-off-by: Corey Minyard <corey@minyard.net>
This commit corrects the order of arguments passed to panthor_gem_sync()
function, called when the SYNC_WAIT condition has to be evaluated for a
blocked GPU queue.
Fixes: cd2c9c3015 ("drm/panthor: Add flag to map GEM object Write-Back Cacheable")
Signed-off-by: Akash Goel <akash.goel@arm.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patch.msgid.link/20260305110723.2871733-1-akash.goel@arm.com
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Borislav reported a division by zero in the timekeeping code and random
hangs with the new coupled clocksource/clockevent functionality.
It turned out that the TSC clocksource is not always updating the
freq_khz field of the clocksource on registration. The coupled mode
conversion calculation requires the frequency and as it's not
initialized the resulting factor is zero or a random value. As a
consequence this causes a division by zero or random boot hangs.
Instead of chasing down all clocksources which fail to update that
member, fill it in at registration time where the caller has to supply
the frequency anyway. Except for special clocksources like jiffies which
never can have coupled mode.
To make this more robust put a check into the registration function to
validate that the caller supplied a frequency if the coupled mode
feature bit is set. If not, emit a warning and clear the feature bit.
Fixes: cd38bdb8e6 ("timekeeping: Provide infrastructure for coupled clockevents")
Reported-by: Borislav Petkov <bp@alien8.de>
Reported-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Tested-by: Borislav Petkov <bp@alien8.de>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Link: https://patch.msgid.link/87cy1jsa4m.ffs@tglx
Closes: https://lore.kernel.org/20260303213027.GA2168957@ax162
Nathan reported a boot failure after the coupled clocksource/event support
was enabled for the TSC deadline timer. It turns out that on the affected
test systems the TSC frequency is not refined against HPET, so it is
registered with the same frequency as the TSC-early clocksource.
As a consequence the update function which checks for a change of the
shift/mult pair of the clocksource fails to compute the conversion
limit, which is zero initialized. This check is there to avoid pointless
computations on every timekeeping update cycle (tick).
So the actual clockevent conversion function limits the delta expiry to
zero, which means the timer is always programmed to expire in the
past. This obviously results in a spectacular timer interrupt storm,
which goes unnoticed because the per CPU interrupts on x86 are not
exposed to the runaway detection mechanism and the NMI watchdog is not
yet functional. So the machine simply stops booting.
That did not show up in testing. All test machines refine the TSC frequency
so TSC has a differrent shift/mult pair than TSC-early and the conversion
limit is properly initialized.
Cure that by setting the conversion limit right at the point where the new
clocksource is installed.
Fixes: cd38bdb8e6 ("timekeeping: Provide infrastructure for coupled clockevents")
Reported-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: John Stultz <jstultz@google.com>
Link: https://patch.msgid.link/87bjh4zies.ffs@tglx
Closes: https://lore.kernel.org/20260303012905.GA978396@ax162
When both IMA and EVM fix modes are enabled, accessing a file with IMA
signature but missing EVM HMAC won't cause security.evm to be fixed.
Add a function evm_fix_hmac which will be explicitly called to fix EVM
HMAC for this case.
Suggested-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Coiby Xu <coxu@redhat.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Fix an error reported by the kernel test robot:
au1100fb.c: error: implicit declaration of function 'KSEG1ADDR'; did you mean 'CKSEG1ADDR'?
arch/mips/include/asm/addrspace.h defines KSEG1ADDR only for 32 bit
configurations. So provide its compile-test stub also for 64bit mips builds.
Fixes: 6f366e8648 ("fbdev: au1100fb: Make driver compilable on non-mips platforms")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202603042127.PT6LuKqi-lkp@intel.com/
Signed-off-by: Helge Deller <deller@gmx.de>
Acked-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
When a guest performs an atomic/exclusive operation on memory lacking
the required attributes, user_mem_abort() injects a data abort and
returns early. However, it fails to release the reference to the
host page acquired via __kvm_faultin_pfn().
A malicious guest could repeatedly trigger this fault, leaking host
page references and eventually causing host memory exhaustion (OOM).
Fix this by consolidating the early error returns to a new out_put_page
label that correctly calls kvm_release_page_unused().
Fixes: 2937aeec9d ("KVM: arm64: Handle DABT caused by LS64* instructions on unsupported memory")
Signed-off-by: Fuad Tabba <tabba@google.com>
Reviewed-by: Yuan Yao <yaoyuan@linux.alibaba.com>
Link: https://patch.msgid.link/20260304162222.836152-2-tabba@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
A moderately large pile of fixes, though none of them are super major,
plus a few new quirks and device IDs.
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Merge tag 'asoc-fix-v7.0-rc2' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v7.0
A moderately large pile of fixes, though none of them are super major,
plus a few new quirks and device IDs.
