diff options
| -rw-r--r-- | drivers/perf/arm_smmuv3_pmu.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/perf/arm_smmuv3_pmu.c b/drivers/perf/arm_smmuv3_pmu.c index 7786ccc6d12f..c195a9adec32 100644 --- a/drivers/perf/arm_smmuv3_pmu.c +++ b/drivers/perf/arm_smmuv3_pmu.c @@ -277,7 +277,7 @@ static int smmu_pmu_apply_event_filter(struct smmu_pmu *smmu_pmu, struct perf_event *event, int idx) { u32 span, sid; - unsigned int num_ctrs = smmu_pmu->num_counters; + unsigned int cur_idx, num_ctrs = smmu_pmu->num_counters; bool filter_en = !!get_filter_enable(event); span = filter_en ? get_filter_span(event) : @@ -285,17 +285,19 @@ static int smmu_pmu_apply_event_filter(struct smmu_pmu *smmu_pmu, sid = filter_en ? get_filter_stream_id(event) : SMMU_PMCG_DEFAULT_FILTER_SID; - /* Support individual filter settings */ - if (!smmu_pmu->global_filter) { + cur_idx = find_first_bit(smmu_pmu->used_counters, num_ctrs); + /* + * Per-counter filtering, or scheduling the first globally-filtered + * event into an empty PMU so idx == 0 and it works out equivalent. + */ + if (!smmu_pmu->global_filter || cur_idx == num_ctrs) { smmu_pmu_set_event_filter(event, idx, span, sid); return 0; } - /* Requested settings same as current global settings*/ - idx = find_first_bit(smmu_pmu->used_counters, num_ctrs); - if (idx == num_ctrs || - smmu_pmu_check_global_filter(smmu_pmu->events[idx], event)) { - smmu_pmu_set_event_filter(event, 0, span, sid); + /* Otherwise, must match whatever's currently scheduled */ + if (smmu_pmu_check_global_filter(smmu_pmu->events[cur_idx], event)) { + smmu_pmu_set_evtyper(smmu_pmu, idx, get_event(event)); return 0; } |