diff options
Diffstat (limited to 'arch/arm64/kernel/perf_event.c')
| -rw-r--r-- | arch/arm64/kernel/perf_event.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c index a5193f2146a6..dde06c0f97f3 100644 --- a/arch/arm64/kernel/perf_event.c +++ b/arch/arm64/kernel/perf_event.c @@ -1023,12 +1023,6 @@ static int armv8pmu_set_event_filter(struct hw_perf_event *event, return 0; } -static bool armv8pmu_filter(struct pmu *pmu, int cpu) -{ - struct arm_pmu *armpmu = to_arm_pmu(pmu); - return !cpumask_test_cpu(smp_processor_id(), &armpmu->supported_cpus); -} - static void armv8pmu_reset(void *info) { struct arm_pmu *cpu_pmu = (struct arm_pmu *)info; @@ -1069,6 +1063,14 @@ static int __armv8_pmuv3_map_event(struct perf_event *event, &armv8_pmuv3_perf_cache_map, ARMV8_PMU_EVTYPE_EVENT); + /* + * CHAIN events only work when paired with an adjacent counter, and it + * never makes sense for a user to open one in isolation, as they'll be + * rotated arbitrarily. + */ + if (hw_event_id == ARMV8_PMUV3_PERFCTR_CHAIN) + return -EINVAL; + if (armv8pmu_event_is_64bit(event)) event->hw.flags |= ARMPMU_EVT_64BIT; @@ -1258,7 +1260,6 @@ static int armv8_pmu_init(struct arm_pmu *cpu_pmu, char *name, cpu_pmu->stop = armv8pmu_stop; cpu_pmu->reset = armv8pmu_reset; cpu_pmu->set_event_filter = armv8pmu_set_event_filter; - cpu_pmu->filter = armv8pmu_filter; cpu_pmu->pmu.event_idx = armv8pmu_user_event_idx; |