linux-toradex.git/drivers/perf, branch v5.1-rc4

Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

2019-03-10T17:17:23+00:00

Pull arm64 updates from Catalin Marinas:

 - Pseudo NMI support for arm64 using GICv3 interrupt priorities

 - uaccess macros clean-up (unsafe user accessors also merged but
   reverted, waiting for objtool support on arm64)

 - ptrace regsets for Pointer Authentication (ARMv8.3) key management

 - inX() ordering w.r.t. delay() on arm64 and riscv (acks in place by
   the riscv maintainers)

 - arm64/perf updates: PMU bindings converted to json-schema, unused
   variable and misleading comment removed

 - arm64/debug fixes to ensure checking of the triggering exception
   level and to avoid the propagation of the UNKNOWN FAR value into the
   si_code for debug signals

 - Workaround for Fujitsu A64FX erratum 010001

 - lib/raid6 ARM NEON optimisations

 - NR_CPUS now defaults to 256 on arm64

 - Minor clean-ups (documentation/comments, Kconfig warning, unused
   asm-offsets, clang warnings)

 - MAINTAINERS update for list information to the ARM64 ACPI entry

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (54 commits)
  arm64: mmu: drop paging_init comments
  arm64: debug: Ensure debug handlers check triggering exception level
  arm64: debug: Don't propagate UNKNOWN FAR into si_code for debug signals
  Revert "arm64: uaccess: Implement unsafe accessors"
  arm64: avoid clang warning about self-assignment
  arm64: Kconfig.platforms: fix warning unmet direct dependencies
  lib/raid6: arm: optimize away a mask operation in NEON recovery routine
  lib/raid6: use vdupq_n_u8 to avoid endianness warnings
  arm64: io: Hook up __io_par() for inX() ordering
  riscv: io: Update __io_[p]ar() macros to take an argument
  asm-generic/io: Pass result of I/O accessor to __io_[p]ar()
  arm64: Add workaround for Fujitsu A64FX erratum 010001
  arm64: Rename get_thread_info()
  arm64: Remove documentation about TIF_USEDFPU
  arm64: irqflags: Fix clang build warnings
  arm64: Enable the support of pseudo-NMIs
  arm64: Skip irqflags tracing for NMI in IRQs disabled context
  arm64: Skip preemption when exiting an NMI
  arm64: Handle serror in NMI context
  irqchip/gic-v3: Allow interrupts to be set as pseudo-NMI
  ...

perf/aux: Make perf_event accessible to setup_aux()

2019-02-06T13:00:39+00:00

When pmu::setup_aux() is called the coresight PMU needs to know which
sink to use for the session by looking up the information in the
event's attr::config2 field.

As such simply replace the cpu information by the complete perf_event
structure and change all affected customers.

Signed-off-by: Mathieu Poirier 
Reviewed-by: Suzuki Poulouse 
Acked-by: Peter Zijlstra 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Alexei Starovoitov 
Cc: Greg Kroah-Hartman 
Cc: H. Peter Anvin 
Cc: Heiko Carstens 
Cc: Jiri Olsa 
Cc: Mark Rutland 
Cc: Martin Schwidefsky 
Cc: Namhyung Kim 
Cc: Thomas Gleixner 
Cc: Will Deacon 
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-s390@vger.kernel.org
Link: http://lkml.kernel.org/r/20190131184714.20388-2-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo

perf: xgene: Remove set but not used variable 'config'

2019-01-31T10:55:05+00:00

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/perf/xgene_pmu.c: In function 'xgene_perf_stop':
drivers/perf/xgene_pmu.c:1055:6: warning:
 variable 'config' set but not used [-Wunused-but-set-variable]

It never used since introduction.

Signed-off-by: Yue Haibing 
Signed-off-by: Will Deacon

perf/drivers: Strengthen exclusion checks with PERF_PMU_CAP_NO_EXCLUDE

2019-01-21T10:01:25+00:00

For drivers that do not support context exclusion let's advertise the
PERF_PMU_CAP_NO_EXCLUDE capability. This ensures that perf will
prevent us from handling events where any exclusion flags are set.
Let's also remove the now unnecessary check for exclusion flags.

This change means that qcom_{l2|l3}_pmu will now also indicate that
they do not support exclude_{host|guest} and that xgene_pmu does
not also support exclude_idle and exclude_hv.

Note that for qcom_l2_pmu we now implictly return -EINVAL instead
of -EOPNOTSUPP. This change will result in the perf userspace
utility retrying the perf_event_open system call with fallback
event attributes that do not fail.

Signed-off-by: Andrew Murray 
Signed-off-by: Peter Zijlstra (Intel) 
Acked-by: Will Deacon 
Cc: Arnaldo Carvalho de Melo 
Cc: Benjamin Herrenschmidt 
Cc: Borislav Petkov 
Cc: Ivan Kokshaysky 
Cc: Linus Torvalds 
Cc: Mark Rutland 
Cc: Matt Turner 
Cc: Michael Ellerman 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Richard Henderson 
Cc: Russell King 
Cc: Sascha Hauer 
Cc: Shawn Guo 
Cc: Thomas Gleixner 
Cc: linux-arm-kernel@lists.infradead.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: robin.murphy@arm.com
Cc: suzuki.poulose@arm.com
Link: https://lkml.kernel.org/r/1547128414-50693-9-git-send-email-andrew.murray@arm.com
Signed-off-by: Ingo Molnar

For drivers that do not support context exclusion let's advertise the

2019-01-21T10:01:24+00:00

PERF_PMU_CAP_NO_EXCLUDE capability. This ensures that perf will
prevent us from handling events where any exclusion flags are set.
Let's also remove the now unnecessary check for exclusion flags.

Signed-off-by: Andrew Murray 
Signed-off-by: Peter Zijlstra (Intel) 
Acked-by: Will Deacon 
Cc: Arnaldo Carvalho de Melo 
Cc: Benjamin Herrenschmidt 
Cc: Borislav Petkov 
Cc: Ivan Kokshaysky 
Cc: Linus Torvalds 
Cc: Mark Rutland 
Cc: Matt Turner 
Cc: Michael Ellerman 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Richard Henderson 
Cc: Russell King 
Cc: Sascha Hauer 
Cc: Shawn Guo 
Cc: Thomas Gleixner 
Cc: linux-arm-kernel@lists.infradead.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: robin.murphy@arm.com
Cc: suzuki.poulose@arm.com
Link: https://lkml.kernel.org/r/1547128414-50693-8-git-send-email-andrew.murray@arm.com
Signed-off-by: Ingo Molnar

perf/core, arch/arm: Use PERF_PMU_CAP_NO_EXCLUDE conditionally

2019-01-21T10:01:22+00:00

The ARM PMU driver can be used to represent a variety of ARM based
PMUs. Some of these PMUs do not provide support for context
exclusion, where this is the case we advertise the
PERF_PMU_CAP_NO_EXCLUDE capability to ensure that perf prevents us
from handling events where any exclusion flags are set.

Where an ARM PMU driver has the set_event_filter function implemented,
we rely on it to perform exclusion checks. At present some of these
functions do not test for all of the available exclude flags.

Signed-off-by: Andrew Murray 
Signed-off-by: Peter Zijlstra (Intel) 
Acked-by: Will Deacon 
Cc: Arnaldo Carvalho de Melo 
Cc: Benjamin Herrenschmidt 
Cc: Borislav Petkov 
Cc: Ivan Kokshaysky 
Cc: Linus Torvalds 
Cc: Mark Rutland 
Cc: Matt Turner 
Cc: Michael Ellerman 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Richard Henderson 
Cc: Russell King 
Cc: Sascha Hauer 
Cc: Shawn Guo 
Cc: Thomas Gleixner 
Cc: linux-arm-kernel@lists.infradead.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: robin.murphy@arm.com
Cc: suzuki.poulose@arm.com
Link: https://lkml.kernel.org/r/1547128414-50693-6-git-send-email-andrew.murray@arm.com
Signed-off-by: Ingo Molnar

drivers/perf: hisi: Fixup one DDRC PMU register offset

2019-01-04T10:13:27+00:00

For DDRC PMU, each PMU counter is fixed-purpose. There is a mismatch
between perf list and driver definition on rw_chg event.
# perf list | grep chg
  hisi_sccl1_ddrc0/rnk_chg/                          [Kernel PMU event]
  hisi_sccl1_ddrc0/rw_chg/                           [Kernel PMU event]
But the register offset of rw_chg event is not defined in the driver,
meanwhile bnk_chg register offset is mis-defined, let's fixup it.

Fixes: 904dcf03f086 ("perf: hisi: Add support for HiSilicon SoC DDRC PMU driver")
Cc: stable@vger.kernel.org
Cc: John Garry 
Cc: Will Deacon 
Cc: Mark Rutland 
Reported-by: Weijian Huang 
Signed-off-by: Shaokun Zhang 
Signed-off-by: Will Deacon

drivers/perf: Add Cavium ThunderX2 SoC UNCORE PMU driver

2018-12-06T13:03:17+00:00

This patch adds a perf driver for the PMU UNCORE devices DDR4 Memory
Controller(DMC) and Level 3 Cache(L3C). Each PMU supports up to 4
counters. All counters lack overflow interrupt and are
sampled periodically.

Reviewed-by: Suzuki K Poulose 
Signed-off-by: Ganapatrao Kulkarni 
[will: consistent enum cpuhp_state naming]
Signed-off-by: Will Deacon

perf: arm_spe: handle devm_kasprintf() failure

2018-11-29T16:29:16+00:00

devm_kasprintf() may return NULL on failure of internal allocation
thus the assignment to 'name' is not safe if unchecked. If NULL
is passed in for name then perf_pmu_register() would not fail
but rather silently jump to skip_type which is not the intent
here. As perf_pmu_register() may also return -ENOMEM returning
-ENOMEM in the (unlikely) failure case of devm_kasprintf() should
be fine here as well.

Acked-by: Mark Rutland 
Fixes: d5d9696b0380 ("drivers/perf: Add support for ARMv8.2 Statistical Profiling Extension")
Signed-off-by: Nicholas Mc Guire 
[will: reworded error message]
Signed-off-by: Will Deacon

drivers/perf: xgene: Add CPU hotplug support

2018-11-21T16:28:00+00:00

If the CPU assigned to the xgene PMU is taken offline, then subsequent
perf invocations on the PMU will fail:

  # echo 0 > /sys/devices/system/cpu/cpu0/online
  # perf stat -a -e l3c0/cycle-count/,l3c0/write/ sleep 1
    Error:
    The sys_perf_event_open() syscall returned with 19 (No such device) for event (l3c0/cycle-count/).
    /bin/dmesg may provide additional information.
    No CONFIG_PERF_EVENTS=y kernel support configured?

This patch implements a hotplug notifier in the xgene PMU driver so that
the PMU context is migrated to another online CPU should its assigned
CPU disappear.

Acked-by: Mark Rutland 
Signed-off-by: Hoan Tran 
[will: Made naming of new cpuhp_state enum entry consistent]
Signed-off-by: Will Deacon