Merge tag 'v6.7-rc8' into locking/core, to pick up dependent changes

Pick up these commits from Linus's tree:

b106bcf0f99a ("locking/osq_lock: Clarify osq_wait_next()")
563adbfc351b ("locking/o

Merge tag 'v6.7-rc8' into locking/core, to pick up dependent changes

Pick up these commits from Linus's tree:

b106bcf0f99a ("locking/osq_lock: Clarify osq_wait_next()")
563adbfc351b ("locking/osq_lock: Clarify osq_wait_next() calling convention")
7c2230982129 ("locking/osq_lock: Move the definition of optimistic_spin_node into osq_lock.c")

Signed-off-by: Ingo Molnar <mingo@kernel.org>

show more ...

Merge tag 'v6.7-rc6' into sched/core, to pick up fixes

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Merge branch 'tip/perf/urgent'

Avoid conflicts, base on fixes.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>

Merge branch 'master' into mm-hotfixes-stable

Merge 6.7-rc4 into char-misc-linus

We need 6.7-rc4 in here as we need to revert one of the debugfs changes
that came in that release through the wireless tree.

Signed-off-by: Greg Kroah-Hartman <gr

Merge 6.7-rc4 into char-misc-linus

We need 6.7-rc4 in here as we need to revert one of the debugfs changes
that came in that release through the wireless tree.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...

Merge tag 'perf-tools-fixes-for-v6.7-1-2023-11-29' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

Pull perf tools fixes from Namhyung Kim:
"Assorted build fixes including:

- f

Merge tag 'perf-tools-fixes-for-v6.7-1-2023-11-29' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

Pull perf tools fixes from Namhyung Kim:
"Assorted build fixes including:

- fix compile errors in printf() with u64 on 32-bit systesm

- sync kernel headers to the tool copies

- update arm64 sysreg generation for tarballs

- disable compile warnings on __packed attribute"

* tag 'perf-tools-fixes-for-v6.7-1-2023-11-29' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools:
tools: Disable __packed attribute compiler warning due to -Werror=attributes
perf build: Ensure sysreg-defs Makefile respects output dir
tools perf: Add arm64 sysreg files to MANIFEST
tools/perf: Update tools's copy of mips syscall table
tools/perf: Update tools's copy of s390 syscall table
tools/perf: Update tools's copy of powerpc syscall table
tools/perf: Update tools's copy of x86 syscall table
tools headers: Update tools's copy of s390/asm headers
tools headers: Update tools's copy of arm64/asm headers
tools headers: Update tools's copy of x86/asm headers
tools headers: Update tools's copy of socket.h header
tools headers UAPI: Update tools's copy of unistd.h header
tools headers UAPI: Update tools's copy of vhost.h header
tools headers UAPI: Update tools's copy of mount.h header
tools headers UAPI: Update tools's copy of kvm.h header
tools headers UAPI: Update tools's copy of fscrypt.h header
tools headers UAPI: Update tools's copy of drm headers
perf lock contention: Fix a build error on 32-bit
perf kwork: Fix a build error on 32-bit

show more ...

perf build: Ensure sysreg-defs Makefile respects output dir

Currently the sysreg-defs are written out to the source tree
unconditionally, ignoring the specified output directory. Correct the
build r

perf build: Ensure sysreg-defs Makefile respects output dir

Currently the sysreg-defs are written out to the source tree
unconditionally, ignoring the specified output directory. Correct the
build rule to emit the header to the output directory. Opportunistically
reorganize the rules to avoid interleaving with the set of beauty make
rules.

Reported-by: Ian Rogers <irogers@google.com>
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Link: https://lore.kernel.org/r/20231121192956.919380-3-oliver.upton@linux.dev
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

show more ...

Merge branch 'next' into for-linus

Prepare input updates for 6.7 merge window.

Merge tag 'perf-tools-for-v6.7-1-2023-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

Pull perf tools updates from Namhyung Kim:
"Build:

- Compile BPF programs by defaul

Merge tag 'perf-tools-for-v6.7-1-2023-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

Pull perf tools updates from Namhyung Kim:
"Build:

- Compile BPF programs by default if clang (>= 12.0.1) is available
to enable more features like kernel lock contention, off-cpu
profiling, kwork, sample filtering and so on.

This can be disabled by passing BUILD_BPF_SKEL=0 to make.

- Produce better error messages for bison on debug build (make
DEBUG=1) by defining YYDEBUG symbol internally.

perf record:

- Track sideband events (like FORK/MMAP) from all CPUs even if perf
record targets a subset of CPUs only (using -C option). Otherwise
it may lose some information happened on a CPU out of the target
list.

- Fix checking raw sched_switch tracepoint argument using system BTF.
This affects off-cpu profiling which attaches a BPF program to the
raw tracepoint.

perf lock contention:

- Add --lock-cgroup option to see contention by cgroups. This should
be used with BPF only (using -b option).

$ sudo perf lock con -ab --lock-cgroup -- sleep 1
contended total wait max wait avg wait cgroup

835 14.06 ms 41.19 us 16.83 us /system.slice/led.service
25 122.38 us 13.77 us 4.89 us /
44 23.73 us 3.87 us 539 ns /user.slice/user-657345.slice/session-c4.scope
1 491 ns 491 ns 491 ns /system.slice/connectd.service

- Add -G/--cgroup-filter option to see contention only for given
cgroups.

This can be useful when you identified a cgroup in the above
command and want to investigate more on it. It also works with
other output options like -t/--threads and -l/--lock-addr.

$ sudo perf lock con -ab -G /user.slice/user-657345.slice/session-c4.scope -- sleep 1
contended total wait max wait avg wait type caller

8 77.11 us 17.98 us 9.64 us spinlock futex_wake+0xc8
2 24.56 us 14.66 us 12.28 us spinlock tick_do_update_jiffies64+0x25
1 4.97 us 4.97 us 4.97 us spinlock futex_q_lock+0x2a

- Use per-cpu array for better spinlock tracking. This is to improve
performance of the BPF program and to avoid nested contention on a
lock in the BPF hash map.

- Update callstack check for PowerPC. To find a representative caller
of a lock, it needs to look up the call stacks. It ends the lookup
when it sees 0 in the call stack buffer. However, PowerPC call
stacks can have 0 values in the beginning so skip them when it
expects valid call stacks after.

perf kwork:

- Support 'sched' class (for -k option) so that it can see task
scheduling event (using sched_switch tracepoint) as well as irq and
workqueue items.

- Add perf kwork top subcommand to show more accurate cpu utilization
with sched class above. It works both with a recorded data (using
perf kwork record command) and BPF (using -b option). Unlike perf
top command, it does not support interactive mode (yet).

$ sudo perf kwork top -b -k sched
Starting trace, Hit <Ctrl+C> to stop and report
^C
Total : 160702.425 ms, 8 cpus
%Cpu(s): 36.00% id, 0.00% hi, 0.00% si
%Cpu0 [|||||||||||||||||| 61.66%]
%Cpu1 [|||||||||||||||||| 61.27%]
%Cpu2 [||||||||||||||||||| 66.40%]
%Cpu3 [|||||||||||||||||| 61.28%]
%Cpu4 [|||||||||||||||||| 61.82%]
%Cpu5 [||||||||||||||||||||||| 77.41%]
%Cpu6 [|||||||||||||||||| 61.73%]
%Cpu7 [|||||||||||||||||| 63.25%]

PID SPID %CPU RUNTIME COMMMAND
-------------------------------------------------------------
0 0 38.72 8089.463 ms [swapper/1]
0 0 38.71 8084.547 ms [swapper/3]
0 0 38.33 8007.532 ms [swapper/0]
0 0 38.26 7992.985 ms [swapper/6]
0 0 38.17 7971.865 ms [swapper/4]
0 0 36.74 7447.765 ms [swapper/7]
0 0 33.59 6486.942 ms [swapper/2]
0 0 22.58 3771.268 ms [swapper/5]
9545 9351 2.48 447.136 ms sched-messaging
9574 9351 2.09 418.583 ms sched-messaging
9724 9351 2.05 372.407 ms sched-messaging
9531 9351 2.01 368.804 ms sched-messaging
9512 9351 2.00 362.250 ms sched-messaging
9514 9351 1.95 357.767 ms sched-messaging
9538 9351 1.86 384.476 ms sched-messaging
9712 9351 1.84 386.490 ms sched-messaging
9723 9351 1.83 380.021 ms sched-messaging
9722 9351 1.82 382.738 ms sched-messaging
9517 9351 1.81 354.794 ms sched-messaging
9559 9351 1.79 344.305 ms sched-messaging
9725 9351 1.77 365.315 ms sched-messaging
<SNIP>

- Add hard/soft-irq statistics to perf kwork top. This will show the
total CPU utilization with IRQ stats like below:

$ sudo perf kwork top -b -k sched,irq,softirq
Starting trace, Hit <Ctrl+C> to stop and report
^C
Total : 12554.889 ms, 8 cpus
%Cpu(s): 96.23% id, 0.10% hi, 0.19% si <---- here
%Cpu0 [| 4.60%]
%Cpu1 [| 4.59%]
%Cpu2 [ 2.73%]
%Cpu3 [| 3.81%]
<SNIP>

perf bench:

- Add -G/--cgroups option to perf bench sched pipe. The pipe bench is
good to measure context switch overhead. With this option, it puts
the reader and writer tasks in separate cgroups to enforce context
switch between two different cgroups.

Also it needs to set CPU affinity of the tasks in a CPU to
accurately measure the impact of cgroup context switches.

$ sudo perf stat -e context-switches,cgroup-switches -- \
> taskset -c 0 perf bench sched pipe -l 100000
# Running 'sched/pipe' benchmark:
# Executed 100000 pipe operations between two processes

Total time: 0.307 [sec]

3.078180 usecs/op
324867 ops/sec

Performance counter stats for 'taskset -c 0 perf bench sched pipe -l 100000':

200,026 context-switches
63 cgroup-switches

0.321637922 seconds time elapsed

You can see small number of cgroup-switches because both write and
read tasks are in the same cgroup.

$ sudo mkdir /sys/fs/cgroup/{AAA,BBB}

$ sudo perf stat -e context-switches,cgroup-switches -- \
> taskset -c 0 perf bench sched pipe -l 100000 -G AAA,BBB
# Running 'sched/pipe' benchmark:
# Executed 100000 pipe operations between two processes

Total time: 0.351 [sec]

3.512990 usecs/op
284657 ops/sec

Performance counter stats for 'taskset -c 0 perf bench sched pipe -l 100000 -G AAA,BBB':

200,020 context-switches
200,019 cgroup-switches

0.365034567 seconds time elapsed

Now context-switches and cgroup-switches are almost same. And you
can see the pipe operation took little more.

- Kill child processes when perf bench sched messaging exited
abnormally. Otherwise it'd leave the child doing unnecessary work.

perf test:

- Fix various shellcheck issues on the tests written in shell script.

- Skip tests when condition is not satisfied:
- object code reading test for non-text section addresses.
- CoreSight test if cs_etm// event is not available.
- lock contention test if not enough CPUs.

Event parsing:

- Make PMU alias name loading lazy to reduce the startup time in the
event parsing code for perf record, stat and others in the general
case.

- Lazily compute PMU default config. In the same sense, delay PMU
initialization until it's really needed to reduce the startup cost.

- Fix event term values that are raw events. The event specification
can have several terms including event name. But sometimes it
clashes with raw event encoding which starts with 'r' and has
hex-digits.

For example, an event named 'read' should be processed as a normal
event but it was mis-treated as a raw encoding and caused a
failure.

$ perf stat -e 'uncore_imc_free_running/event=read/' -a sleep 1
event syntax error: '..nning/event=read/'
\___ parser error
Run 'perf list' for a list of valid events

Usage: perf stat [<options>] [<command>]

-e, --event <event> event selector. use 'perf list' to list available events

Event metrics:

- Add "Compat" regex to match event with multiple identifiers.

- Usual updates for Intel, Power10, Arm telemetry/CMN and AmpereOne.

Misc:

- Assorted memory leak fixes and footprint reduction.

- Add "bpf_skeletons" to perf version --build-options so that users
can check whether their perf tools have BPF support easily.

- Fix unaligned access in Intel-PT packet decoder found by
undefined-behavior sanitizer.

- Avoid frequency mode for the dummy event. Surprisingly it'd impact
kernel timer tick handler performance by force iterating all PMU
events.

- Update bash shell completion for events and metrics"

* tag 'perf-tools-for-v6.7-1-2023-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: (187 commits)
perf vendor events intel: Update tsx_cycles_per_elision metrics
perf vendor events intel: Update bonnell version number to v5
perf vendor events intel: Update westmereex events to v4
perf vendor events intel: Update meteorlake events to v1.06
perf vendor events intel: Update knightslanding events to v16
perf vendor events intel: Add typo fix for ivybridge FP
perf vendor events intel: Update a spelling in haswell/haswellx
perf vendor events intel: Update emeraldrapids to v1.01
perf vendor events intel: Update alderlake/alderlake events to v1.23
perf build: Disable BPF skeletons if clang version is < 12.0.1
perf callchain: Fix spelling mistake "statisitcs" -> "statistics"
perf report: Fix spelling mistake "heirachy" -> "hierarchy"
perf python: Fix binding linkage due to rename and move of evsel__increase_rlimit()
perf tests: test_arm_coresight: Simplify source iteration
perf vendor events intel: Add tigerlake two metrics
perf vendor events intel: Add broadwellde two metrics
perf vendor events intel: Fix broadwellde tma_info_system_dram_bw_use metric
perf mem_info: Add and use map_symbol__exit and addr_map_symbol__exit
perf callchain: Minor layout changes to callchain_list
perf callchain: Make brtype_stat in callchain_list optional
...

show more ...

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm updates from Paolo Bonzini:
"ARM:

- Generalized infrastructure for 'writable' ID registers, effectively
allowing

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm updates from Paolo Bonzini:
"ARM:

- Generalized infrastructure for 'writable' ID registers, effectively
allowing userspace to opt-out of certain vCPU features for its
guest

- Optimization for vSGI injection, opportunistically compressing
MPIDR to vCPU mapping into a table

- Improvements to KVM's PMU emulation, allowing userspace to select
the number of PMCs available to a VM

- Guest support for memory operation instructions (FEAT_MOPS)

- Cleanups to handling feature flags in KVM_ARM_VCPU_INIT, squashing
bugs and getting rid of useless code

- Changes to the way the SMCCC filter is constructed, avoiding wasted
memory allocations when not in use

- Load the stage-2 MMU context at vcpu_load() for VHE systems,
reducing the overhead of errata mitigations

- Miscellaneous kernel and selftest fixes

LoongArch:

- New architecture for kvm.

The hardware uses the same model as x86, s390 and RISC-V, where
guest/host mode is orthogonal to supervisor/user mode. The
virtualization extensions are very similar to MIPS, therefore the
code also has some similarities but it's been cleaned up to avoid
some of the historical bogosities that are found in arch/mips. The
kernel emulates MMU, timer and CSR accesses, while interrupt
controllers are only emulated in userspace, at least for now.

RISC-V:

- Support for the Smstateen and Zicond extensions

- Support for virtualizing senvcfg

- Support for virtualized SBI debug console (DBCN)

S390:

- Nested page table management can be monitored through tracepoints
and statistics

x86:

- Fix incorrect handling of VMX posted interrupt descriptor in
KVM_SET_LAPIC, which could result in a dropped timer IRQ

- Avoid WARN on systems with Intel IPI virtualization

- Add CONFIG_KVM_MAX_NR_VCPUS, to allow supporting up to 4096 vCPUs
without forcing more common use cases to eat the extra memory
overhead.

- Add virtualization support for AMD SRSO mitigation (IBPB_BRTYPE and
SBPB, aka Selective Branch Predictor Barrier).

- Fix a bug where restoring a vCPU snapshot that was taken within 1
second of creating the original vCPU would cause KVM to try to
synchronize the vCPU's TSC and thus clobber the correct TSC being
set by userspace.

- Compute guest wall clock using a single TSC read to avoid
generating an inaccurate time, e.g. if the vCPU is preempted
between multiple TSC reads.

- "Virtualize" HWCR.TscFreqSel to make Linux guests happy, which
complain about a "Firmware Bug" if the bit isn't set for select
F/M/S combos. Likewise "virtualize" (ignore) MSR_AMD64_TW_CFG to
appease Windows Server 2022.

- Don't apply side effects to Hyper-V's synthetic timer on writes
from userspace to fix an issue where the auto-enable behavior can
trigger spurious interrupts, i.e. do auto-enabling only for guest
writes.

- Remove an unnecessary kick of all vCPUs when synchronizing the
dirty log without PML enabled.

- Advertise "support" for non-serializing FS/GS base MSR writes as
appropriate.

- Harden the fast page fault path to guard against encountering an
invalid root when walking SPTEs.

- Omit "struct kvm_vcpu_xen" entirely when CONFIG_KVM_XEN=n.

- Use the fast path directly from the timer callback when delivering
Xen timer events, instead of waiting for the next iteration of the
run loop. This was not done so far because previously proposed code
had races, but now care is taken to stop the hrtimer at critical
points such as restarting the timer or saving the timer information
for userspace.

- Follow the lead of upstream Xen and ignore the VCPU_SSHOTTMR_future
flag.

- Optimize injection of PMU interrupts that are simultaneous with
NMIs.

- Usual handful of fixes for typos and other warts.

x86 - MTRR/PAT fixes and optimizations:

- Clean up code that deals with honoring guest MTRRs when the VM has
non-coherent DMA and host MTRRs are ignored, i.e. EPT is enabled.

- Zap EPT entries when non-coherent DMA assignment stops/start to
prevent using stale entries with the wrong memtype.

- Don't ignore guest PAT for CR0.CD=1 && KVM_X86_QUIRK_CD_NW_CLEARED=y

This was done as a workaround for virtual machine BIOSes that did
not bother to clear CR0.CD (because ancient KVM/QEMU did not bother
to set it, in turn), and there's zero reason to extend the quirk to
also ignore guest PAT.

x86 - SEV fixes:

- Report KVM_EXIT_SHUTDOWN instead of EINVAL if KVM intercepts
SHUTDOWN while running an SEV-ES guest.

- Clean up the recognition of emulation failures on SEV guests, when
KVM would like to "skip" the instruction but it had already been
partially emulated. This makes it possible to drop a hack that
second guessed the (insufficient) information provided by the
emulator, and just do the right thing.

Documentation:

- Various updates and fixes, mostly for x86

- MTRR and PAT fixes and optimizations"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (164 commits)
KVM: selftests: Avoid using forced target for generating arm64 headers
tools headers arm64: Fix references to top srcdir in Makefile
KVM: arm64: Add tracepoint for MMIO accesses where ISV==0
KVM: arm64: selftest: Perform ISB before reading PAR_EL1
KVM: arm64: selftest: Add the missing .guest_prepare()
KVM: arm64: Always invalidate TLB for stage-2 permission faults
KVM: x86: Service NMI requests after PMI requests in VM-Enter path
KVM: arm64: Handle AArch32 SPSR_{irq,abt,und,fiq} as RAZ/WI
KVM: arm64: Do not let a L1 hypervisor access the *32_EL2 sysregs
KVM: arm64: Refine _EL2 system register list that require trap reinjection
arm64: Add missing _EL2 encodings
arm64: Add missing _EL12 encodings
KVM: selftests: aarch64: vPMU test for validating user accesses
KVM: selftests: aarch64: vPMU register test for unimplemented counters
KVM: selftests: aarch64: vPMU register test for implemented counters
KVM: selftests: aarch64: Introduce vpmu_counter_access test
tools: Import arm_pmuv3.h
KVM: arm64: PMU: Allow userspace to limit PMCR_EL0.N for the guest
KVM: arm64: Sanitize PM{C,I}NTEN{SET,CLR}, PMOVS{SET,CLR} before first run
KVM: arm64: Add {get,set}_user for PM{C,I}NTEN{SET,CLR}, PMOVS{SET,CLR}
...

show more ...

Merge branch 'for-6.7/config_pm' into for-linus

- #ifdef CONFIG_PM removal from HID code (Thomas Weißschuh)

Merge tag 'kvmarm-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 updates for 6.7

- Generalized infrastructure for 'writable' ID registers, effectively
a

Merge tag 'kvmarm-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 updates for 6.7

- Generalized infrastructure for 'writable' ID registers, effectively
allowing userspace to opt-out of certain vCPU features for its guest

- Optimization for vSGI injection, opportunistically compressing MPIDR
to vCPU mapping into a table

- Improvements to KVM's PMU emulation, allowing userspace to select
the number of PMCs available to a VM

- Guest support for memory operation instructions (FEAT_MOPS)

- Cleanups to handling feature flags in KVM_ARM_VCPU_INIT, squashing
bugs and getting rid of useless code

- Changes to the way the SMCCC filter is constructed, avoiding wasted
memory allocations when not in use

- Load the stage-2 MMU context at vcpu_load() for VHE systems, reducing
the overhead of errata mitigations

- Miscellaneous kernel and selftest fixes

show more ...

Merge branch kvm-arm64/writable-id-regs into kvmarm/next

* kvm-arm64/writable-id-regs:
: Writable ID registers, courtesy of Jing Zhang
:
: This series significantly expands the architectural f

Merge branch kvm-arm64/writable-id-regs into kvmarm/next

* kvm-arm64/writable-id-regs:
: Writable ID registers, courtesy of Jing Zhang
:
: This series significantly expands the architectural feature set that
: userspace can manipulate via the ID registers. A new ioctl is defined
: that makes the mutable fields in the ID registers discoverable to
: userspace.
KVM: selftests: Avoid using forced target for generating arm64 headers
tools headers arm64: Fix references to top srcdir in Makefile
KVM: arm64: selftests: Test for setting ID register from usersapce
tools headers arm64: Update sysreg.h with kernel sources
KVM: selftests: Generate sysreg-defs.h and add to include path
perf build: Generate arm64's sysreg-defs.h and add to include path
tools: arm64: Add a Makefile for generating sysreg-defs.h
KVM: arm64: Document vCPU feature selection UAPIs
KVM: arm64: Allow userspace to change ID_AA64ZFR0_EL1
KVM: arm64: Allow userspace to change ID_AA64PFR0_EL1
KVM: arm64: Allow userspace to change ID_AA64MMFR{0-2}_EL1
KVM: arm64: Allow userspace to change ID_AA64ISAR{0-2}_EL1
KVM: arm64: Bump up the default KVM sanitised debug version to v8p8
KVM: arm64: Reject attempts to set invalid debug arch version
KVM: arm64: Advertise selected DebugVer in DBGDIDR.Version
KVM: arm64: Use guest ID register values for the sake of emulation
KVM: arm64: Document KVM_ARM_GET_REG_WRITABLE_MASKS
KVM: arm64: Allow userspace to get the writable masks for feature ID registers

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

show more ...

perf mem_info: Add and use map_symbol__exit and addr_map_symbol__exit

Fix leak where mem_info__put wouldn't release the maps/map as used by
perf mem. Add exit functions and use elsewhere that the ma

perf mem_info: Add and use map_symbol__exit and addr_map_symbol__exit

Fix leak where mem_info__put wouldn't release the maps/map as used by
perf mem. Add exit functions and use elsewhere that the maps and map
are released.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: liuwenyu <liuwenyu7@huawei.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Song Liu <song@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20231024222353.3024098-12-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

show more ...

perf build: Generate arm64's sysreg-defs.h and add to include path

Start generating sysreg-defs.h in anticipation of updating sysreg.h to a
version that needs the generated output.

Acked-by: Arnald

perf build: Generate arm64's sysreg-defs.h and add to include path

Start generating sysreg-defs.h in anticipation of updating sysreg.h to a
version that needs the generated output.

Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20231011195740.3349631-3-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

show more ...

Merge branch 'linus' into smp/core

Pull in upstream to get the fixes so depending changes can be applied.

Merge drm/drm-next into drm-misc-next

Updating drm-misc-next to the state of Linux v6.6-rc2.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Merge tag 'v6.6-rc4' into perf/core, to pick up fixes

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Merge tag 'v6.6-rc2' into locking/core, to pick up fixes

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Merge drm/drm-next into drm-intel-next

Sync to v6.6-rc1.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Cross-merge networking fixes after downstream PR.

No conflicts.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>

perf kwork top: Implements BPF-based cpu usage statistics

Use BPF to collect statistics on the CPU usage based on perf BPF skeletons.

Example usage:

# perf kwork top -h

Usage: perf kwork top

perf kwork top: Implements BPF-based cpu usage statistics

Use BPF to collect statistics on the CPU usage based on perf BPF skeletons.

Example usage:

# perf kwork top -h

Usage: perf kwork top [<options>]

-b, --use-bpf Use BPF to measure task cpu usage
-C, --cpu <cpu> list of cpus to profile
-i, --input <file> input file name
-n, --name <name> event name to profile
-s, --sort <key[,key2...]>
sort by key(s): rate, runtime, tid
--time <str> Time span for analysis (start,stop)

#
# perf kwork -k sched top -b
Starting trace, Hit <Ctrl+C> to stop and report
^C
Total : 160702.425 ms, 8 cpus
%Cpu(s): 36.00% id, 0.00% hi, 0.00% si
%Cpu0 [|||||||||||||||||| 61.66%]
%Cpu1 [|||||||||||||||||| 61.27%]
%Cpu2 [||||||||||||||||||| 66.40%]
%Cpu3 [|||||||||||||||||| 61.28%]
%Cpu4 [|||||||||||||||||| 61.82%]
%Cpu5 [||||||||||||||||||||||| 77.41%]
%Cpu6 [|||||||||||||||||| 61.73%]
%Cpu7 [|||||||||||||||||| 63.25%]

PID SPID %CPU RUNTIME COMMMAND
-------------------------------------------------------------
0 0 38.72 8089.463 ms [swapper/1]
0 0 38.71 8084.547 ms [swapper/3]
0 0 38.33 8007.532 ms [swapper/0]
0 0 38.26 7992.985 ms [swapper/6]
0 0 38.17 7971.865 ms [swapper/4]
0 0 36.74 7447.765 ms [swapper/7]
0 0 33.59 6486.942 ms [swapper/2]
0 0 22.58 3771.268 ms [swapper/5]
9545 9351 2.48 447.136 ms sched-messaging
9574 9351 2.09 418.583 ms sched-messaging
9724 9351 2.05 372.407 ms sched-messaging
9531 9351 2.01 368.804 ms sched-messaging
9512 9351 2.00 362.250 ms sched-messaging
9514 9351 1.95 357.767 ms sched-messaging
9538 9351 1.86 384.476 ms sched-messaging
9712 9351 1.84 386.490 ms sched-messaging
9723 9351 1.83 380.021 ms sched-messaging
9722 9351 1.82 382.738 ms sched-messaging
9517 9351 1.81 354.794 ms sched-messaging
9559 9351 1.79 344.305 ms sched-messaging
9725 9351 1.77 365.315 ms sched-messaging
<SNIP>

# perf kwork -k sched top -b -n perf
Starting trace, Hit <Ctrl+C> to stop and report
^C
Total : 151563.332 ms, 8 cpus
%Cpu(s): 26.49% id, 0.00% hi, 0.00% si
%Cpu0 [ 0.01%]
%Cpu1 [ 0.00%]
%Cpu2 [ 0.00%]
%Cpu3 [ 0.00%]
%Cpu4 [ 0.00%]
%Cpu5 [ 0.00%]
%Cpu6 [ 0.00%]
%Cpu7 [ 0.00%]

PID SPID %CPU RUNTIME COMMMAND
-------------------------------------------------------------
9754 9754 0.01 2.303 ms perf

#
# perf kwork -k sched top -b -C 2,3,4
Starting trace, Hit <Ctrl+C> to stop and report
^C
Total : 48016.721 ms, 3 cpus
%Cpu(s): 27.82% id, 0.00% hi, 0.00% si
%Cpu2 [|||||||||||||||||||||| 74.68%]
%Cpu3 [||||||||||||||||||||| 71.06%]
%Cpu4 [||||||||||||||||||||| 70.91%]

PID SPID %CPU RUNTIME COMMMAND
-------------------------------------------------------------
0 0 29.08 4734.998 ms [swapper/4]
0 0 28.93 4710.029 ms [swapper/3]
0 0 25.31 3912.363 ms [swapper/2]
10248 10158 1.62 264.931 ms sched-messaging
10253 10158 1.62 265.136 ms sched-messaging
10158 10158 1.60 263.013 ms bash
10360 10158 1.49 243.639 ms sched-messaging
10413 10158 1.48 238.604 ms sched-messaging
10531 10158 1.47 234.067 ms sched-messaging
10400 10158 1.47 240.631 ms sched-messaging
10355 10158 1.47 230.586 ms sched-messaging
10377 10158 1.43 234.835 ms sched-messaging
10526 10158 1.42 232.045 ms sched-messaging
10298 10158 1.41 222.396 ms sched-messaging
10410 10158 1.38 221.853 ms sched-messaging
10364 10158 1.38 226.042 ms sched-messaging
10480 10158 1.36 213.633 ms sched-messaging
10370 10158 1.36 223.620 ms sched-messaging
10553 10158 1.34 217.169 ms sched-messaging
10291 10158 1.34 211.516 ms sched-messaging
10251 10158 1.34 218.813 ms sched-messaging
10522 10158 1.33 218.498 ms sched-messaging
10288 10158 1.33 216.787 ms sched-messaging
<SNIP>

Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Link: https://lore.kernel.org/r/20230812084917.169338-15-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

show more ...

Merge drm/drm-fixes into drm-misc-fixes

Forwarding to v6.6-rc1.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Merge tag 'perf-tools-for-v6.6-1-2023-09-05' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

Pull perf tools updates from Arnaldo Carvalho de Melo:
"perf tools maintainership:

Merge tag 'perf-tools-for-v6.6-1-2023-09-05' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

Pull perf tools updates from Arnaldo Carvalho de Melo:
"perf tools maintainership:

- Add git information for perf-tools and perf-tools-next trees and
branches to the MAINTAINERS file. That is where development now
takes place and myself and Namhyung Kim have write access, more
people to come as we emulate other maintainer groups.

perf record:

- Record kernel data maps when 'perf record --data' is used, so that
global variables can be resolved and used in tools that do data
profiling.

perf trace:

- Remove the old, experimental support for BPF events in which a .c
file was passed as an event: "perf trace -e hello.c" to then get
compiled and loaded.

The only known usage for that, that shipped with the kernel as an
example for such events, augmented the raw_syscalls tracepoints and
was converted to a libbpf skeleton, reusing all the user space
components and the BPF code connected to the syscalls.

In the end just the way to glue the BPF part and the user space
type beautifiers changed, now being performed by libbpf skeletons.

The next step is to use BTF to do pretty printing of all syscall
types, as discussed with Alan Maguire and others.

Now, on a perf built with BUILD_BPF_SKEL=1 we get most if not all
path/filenames/strings, some of the networking data structures,
perf_event_attr, etc, i.e. systemwide tracing of nanosleep calls
and perf_event_open syscalls while 'perf stat' runs 'sleep' for 5
seconds:

# perf trace -a -e *nanosleep,perf* perf stat -e cycles,instructions sleep 5
0.000 ( 9.034 ms): perf/327641 perf_event_open(attr_uptr: { type: 0 (PERF_TYPE_HARDWARE), size: 136, config: 0 (PERF_COUNT_HW_CPU_CYCLES), sample_type: IDENTIFIER, read_format: TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING, disabled: 1, inherit: 1, enable_on_exec: 1, exclude_guest: 1 }, pid: 327642 (perf), cpu: -1, group_fd: -1, flags: FD_CLOEXEC) = 3
9.039 ( 0.006 ms): perf/327641 perf_event_open(attr_uptr: { type: 0 (PERF_TYPE_HARDWARE), size: 136, config: 0x1 (PERF_COUNT_HW_INSTRUCTIONS), sample_type: IDENTIFIER, read_format: TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING, disabled: 1, inherit: 1, enable_on_exec: 1, exclude_guest: 1 }, pid: 327642 (perf-exec), cpu: -1, group_fd: -1, flags: FD_CLOEXEC) = 4
? ( ): gpm/991 ... [continued]: clock_nanosleep()) = 0
10.133 ( ): sleep/327642 clock_nanosleep(rqtp: { .tv_sec: 5, .tv_nsec: 0 }, rmtp: 0x7ffd36f83ed0) ...
? ( ): pool-gsd-smart/3051 ... [continued]: clock_nanosleep()) = 0
30.276 ( ): gpm/991 clock_nanosleep(rqtp: { .tv_sec: 2, .tv_nsec: 0 }, rmtp: 0x7ffcc6f73710) ...
223.215 (1000.430 ms): pool-gsd-smart/3051 clock_nanosleep(rqtp: { .tv_sec: 1, .tv_nsec: 0 }, rmtp: 0x7f6e7fffec90) = 0
30.276 (2000.394 ms): gpm/991 ... [continued]: clock_nanosleep()) = 0
1230.814 ( ): pool-gsd-smart/3051 clock_nanosleep(rqtp: { .tv_sec: 1, .tv_nsec: 0 }, rmtp: 0x7f6e7fffec90) ...
1230.814 (1000.404 ms): pool-gsd-smart/3051 ... [continued]: clock_nanosleep()) = 0
2030.886 ( ): gpm/991 clock_nanosleep(rqtp: { .tv_sec: 2, .tv_nsec: 0 }, rmtp: 0x7ffcc6f73710) ...
2237.709 (1000.153 ms): pool-gsd-smart/3051 clock_nanosleep(rqtp: { .tv_sec: 1, .tv_nsec: 0 }, rmtp: 0x7f6e7fffec90) = 0
? ( ): crond/1172 ... [continued]: clock_nanosleep()) = 0
3242.699 ( ): pool-gsd-smart/3051 clock_nanosleep(rqtp: { .tv_sec: 1, .tv_nsec: 0 }, rmtp: 0x7f6e7fffec90) ...
2030.886 (2000.385 ms): gpm/991 ... [continued]: clock_nanosleep()) = 0
3728.078 ( ): crond/1172 clock_nanosleep(rqtp: { .tv_sec: 60, .tv_nsec: 0 }, rmtp: 0x7ffe0971dcf0) ...
3242.699 (1000.158 ms): pool-gsd-smart/3051 ... [continued]: clock_nanosleep()) = 0
4031.409 ( ): gpm/991 clock_nanosleep(rqtp: { .tv_sec: 2, .tv_nsec: 0 }, rmtp: 0x7ffcc6f73710) ...
10.133 (5000.375 ms): sleep/327642 ... [continued]: clock_nanosleep()) = 0

Performance counter stats for 'sleep 5':

2,617,347 cycles
1,855,997 instructions # 0.71 insn per cycle

5.002282128 seconds time elapsed

0.000855000 seconds user
0.000852000 seconds sys

perf annotate:

- Building with binutils' libopcode now is opt-in (BUILD_NONDISTRO=1)
for licensing reasons, and we missed a build test on
tools/perf/tests makefile.

Since we now default to NDEBUG=1, we ended up segfaulting when
building with BUILD_NONDISTRO=1 because a needed initialization
routine was being "error checked" via an assert.

Fix it by explicitly checking the result and aborting instead if it
fails.

We better back propagate the error, but at least 'perf annotate' on
samples collected for a BPF program is back working when perf is
built with BUILD_NONDISTRO=1.

perf report/top:

- Add back TUI hierarchy mode header, that is seen when using 'perf
report/top --hierarchy'.

- Fix the number of entries for 'e' key in the TUI that was
preventing navigation of lines when expanding an entry.

perf report/script:

- Support cross platform register handling, allowing a perf.data file
collected on one architecture to have registers sampled correctly
displayed when analysis tools such as 'perf report' and 'perf
script' are used on a different architecture.

- Fix handling of event attributes in pipe mode, i.e. when one uses:

perf record -o - | perf report -i -

When no perf.data files are used.

- Handle files generated via pipe mode with a version of perf and
then read also via pipe mode with a different version of perf,
where the event attr record may have changed, use the record size
field to properly support this version mismatch.

perf probe:

- Accessing global variables from uprobes isn't supported, make the
error message state that instead of stating that some minimal
kernel version is needed to have that feature. This seems just a
tool limitation, the kernel probably has all that is needed.

perf tests:

- Fix a reference count related leak in the dlfilter v0 API where the
result of a thread__find_symbol_fb() is not matched with an
addr_location__exit() to drop the reference counts of the resolved
components (machine, thread, map, symbol, etc). Add a dlfilter test
to make sure that doesn't regresses.

- Lots of fixes for the 'perf test' written in shell script related
to problems found with the shellcheck utility.

- Fixes for 'perf test' shell scripts testing features enabled when
perf is built with BUILD_BPF_SKEL=1, such as 'perf stat' bpf
counters.

- Add perf record sample filtering test, things like the following
example, that gets implemented as a BPF filter attached to the
event:

# perf record -e task-clock -c 10000 --filter 'ip < 0xffffffff00000000'

- Improve the way the task_analyzer test checks if libtraceevent is
linked, using 'perf version --build-options' instead of the more
expensinve 'perf record -e "sched:sched_switch"'.

- Add support for riscv in the mmap-basic test. (This went as well
via the RiscV tree, same contents).

libperf:

- Implement riscv mmap support (This went as well via the RiscV tree,
same contents).

perf script:

- New tool that converts perf.data files to the firefox profiler
format so that one can use the visualizer at
https://profiler.firefox.com/. Done by Anup Sharma as part of this
year's Google Summer of Code.

One can generate the output and upload it to the web interface but
Anup also automated everything:

perf script gecko -F 99 -a sleep 60

- Support syscall name parsing on arm64.

- Print "cgroup" field on the same line as "comm".

perf bench:

- Add new 'uprobe' benchmark to measure the overhead of uprobes
with/without BPF programs attached to it.

- breakpoints are not available on power9, skip that test.

perf stat:

- Add #num_cpus_online literal to be used in 'perf stat' metrics, and
add this extra 'perf test' check that exemplifies its purpose:

TEST_ASSERT_VAL("#num_cpus_online",
expr__parse(&num_cpus_online, ctx, "#num_cpus_online") == 0);
TEST_ASSERT_VAL("#num_cpus", expr__parse(&num_cpus, ctx, "#num_cpus") == 0);
TEST_ASSERT_VAL("#num_cpus >= #num_cpus_online", num_cpus >= num_cpus_online);

Miscellaneous:

- Improve tool startup time by lazily reading PMU, JSON, sysfs data.

- Improve error reporting in the parsing of events, passing YYLTYPE
to error routines, so that the output can show were the parsing
error was found.

- Add 'perf test' entries to check the parsing of events
improvements.

- Fix various leak for things detected by -fsanitize=address, mostly
things that would be freed at tool exit, including:

- Free evsel->filter on the destructor.

- Allow tools to register a thread->priv destructor and use it in
'perf trace'.

- Free evsel->priv in 'perf trace'.

- Free string returned by synthesize_perf_probe_point() when the
caller fails to do all it needs.

- Adjust various compiler options to not consider errors some
warnings when building with broken headers found in things like
python, flex, bison, as we otherwise build with -Werror. Some for
gcc, some for clang, some for some specific version of those, some
for some specific version of flex or bison, or some specific
combination of these components, bah.

- Allow customization of clang options for BPF target, this helps
building on gentoo where there are other oddities where BPF targets
gets passed some compiler options intended for the native build, so
building with WERROR=0 helps while these oddities are fixed.

- Dont pass ERR_PTR() values to perf_session__delete() in 'perf top'
and 'perf lock', fixing some segfaults when handling some odd
failures.

- Add LTO build option.

- Fix format of unordered lists in the perf docs
(tools/perf/Documentation)

- Overhaul the bison files, using constructs such as YYNOMEM.

- Remove unused tokens from the bison .y files.

- Add more comments to various structs.

- A few LoongArch enablement patches.

Vendor events (JSON):

- Add JSON metrics for Yitian 710 DDR (aarch64). Things like:

EventName, BriefDescription
visible_window_limit_reached_rd, "At least one entry in read queue reaches the visible window limit.",
visible_window_limit_reached_wr, "At least one entry in write queue reaches the visible window limit.",
op_is_dqsosc_mpc , "A DQS Oscillator MPC command to DRAM.",
op_is_dqsosc_mrr , "A DQS Oscillator MRR command to DRAM.",
op_is_tcr_mrr , "A Temperature Compensated Refresh(TCR) MRR command to DRAM.",

- Add AmpereOne metrics (aarch64).

- Update N2 and V2 metrics (aarch64) and events using Arm telemetry
repo.

- Update scale units and descriptions of common topdown metrics on
aarch64. Things like:
- "MetricExpr": "stall_slot_frontend / (#slots * cpu_cycles)",
- "BriefDescription": "Frontend bound L1 topdown metric",
+ "MetricExpr": "100 * (stall_slot_frontend / (#slots * cpu_cycles))",
+ "BriefDescription": "This metric is the percentage of total slots that were stalled due to resource constraints in the frontend of the processor.",

- Update events for intel: meteorlake to 1.04, sapphirerapids to
1.15, Icelake+ metric constraints.

- Update files for the power10 platform"

* tag 'perf-tools-for-v6.6-1-2023-09-05' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: (217 commits)
perf parse-events: Fix driver config term
perf parse-events: Fixes relating to no_value terms
perf parse-events: Fix propagation of term's no_value when cloning
perf parse-events: Name the two term enums
perf list: Don't print Unit for "default_core"
perf vendor events intel: Fix modifier in tma_info_system_mem_parallel_reads for skylake
perf dlfilter: Avoid leak in v0 API test use of resolve_address()
perf metric: Add #num_cpus_online literal
perf pmu: Remove str from perf_pmu_alias
perf parse-events: Make common term list to strbuf helper
perf parse-events: Minor help message improvements
perf pmu: Avoid uninitialized use of alias->str
perf jevents: Use "default_core" for events with no Unit
perf test stat_bpf_counters_cgrp: Enhance perf stat cgroup BPF counter test
perf test shell stat_bpf_counters: Fix test on Intel
perf test shell record_bpf_filter: Skip 6.2 kernel
libperf: Get rid of attr.id field
perf tools: Convert to perf_record_header_attr_id()
libperf: Add perf_record_header_attr_id()
perf tools: Handle old data in PERF_RECORD_ATTR
...

show more ...

Merge tag 'v6.5' into next

Sync up with mainline to bring in updates to the shared infrastructure.