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| author | Will Deacon <will.deacon@arm.com> | 2018-10-05 13:24:36 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2018-10-12 15:25:17 +0100 |
| commit | ca2b497253ad01c80061a1f3ee9eb91b5d54a849 (patch) | |
| tree | 06b96eee97a7f40173136b35f8b3ff945ae5925f /drivers/perf/arm_pmu.c | |
| parent | d91680e687f47984ffd3200c8e5d587903e7bd11 (diff) | |
| download | talos-op-linux-ca2b497253ad01c80061a1f3ee9eb91b5d54a849.tar.gz talos-op-linux-ca2b497253ad01c80061a1f3ee9eb91b5d54a849.zip | |
arm64: perf: Reject stand-alone CHAIN events for PMUv3
It doesn't make sense for a perf event to be configured as a CHAIN event
in isolation, so extend the arm_pmu structure with a ->filter_match()
function to allow the backend PMU implementation to reject CHAIN events
early.
Cc: <stable@vger.kernel.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/perf/arm_pmu.c')
| -rw-r--r-- | drivers/perf/arm_pmu.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c index 7f01f6f60b87..d0b7dd8fb184 100644 --- a/drivers/perf/arm_pmu.c +++ b/drivers/perf/arm_pmu.c @@ -485,7 +485,13 @@ static int armpmu_filter_match(struct perf_event *event) { struct arm_pmu *armpmu = to_arm_pmu(event->pmu); unsigned int cpu = smp_processor_id(); - return cpumask_test_cpu(cpu, &armpmu->supported_cpus); + int ret; + + ret = cpumask_test_cpu(cpu, &armpmu->supported_cpus); + if (ret && armpmu->filter_match) + return armpmu->filter_match(event); + + return ret; } static ssize_t armpmu_cpumask_show(struct device *dev, |
