diff options
Diffstat (limited to 'arch/arm/kernel/perf_event.c')
| -rw-r--r-- | arch/arm/kernel/perf_event.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index 9b536be74f7b..df028072aabf 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -524,6 +524,18 @@ static void armpmu_disable(struct pmu *pmu) armpmu->stop(armpmu); } +/* + * In heterogeneous systems, events are specific to a particular + * microarchitecture, and aren't suitable for another. Thus, only match CPUs of + * the same microarchitecture. + */ +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); +} + #ifdef CONFIG_PM static int armpmu_runtime_resume(struct device *dev) { @@ -564,6 +576,7 @@ static void armpmu_init(struct arm_pmu *armpmu) .start = armpmu_start, .stop = armpmu_stop, .read = armpmu_read, + .filter_match = armpmu_filter_match, }; } |