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perf: arm_cspmu: Support implementation specific validation

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Some platforms may use e.g. different filtering mechanism and, thus,
may need different way to validate the events and group.

Signed-off-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20230913233941.9814-4-ilkka@os.amperecomputing.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Ilkka Koskinen 2023-09-13 16:39:40 -07:00 committed by Will Deacon
parent 0a7603ab24
commit 647d5c5a9e
2 changed files with 10 additions and 1 deletions
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8
drivers/perf/arm_cspmu/arm_cspmu.c
View File

@ -576,7 +576,7 @@ static void arm_cspmu_disable(struct pmu *pmu)
static int arm_cspmu_get_event_idx(struct arm_cspmu_hw_events *hw_events,
struct perf_event *event)
{
int idx;
int idx, ret;
struct arm_cspmu *cspmu = to_arm_cspmu(event->pmu);
if (supports_cycle_counter(cspmu)) {
@ -610,6 +610,12 @@ static int arm_cspmu_get_event_idx(struct arm_cspmu_hw_events *hw_events,
if (idx >= cspmu->num_logical_ctrs)
return -EAGAIN;
if (cspmu->impl.ops.validate_event) {
ret = cspmu->impl.ops.validate_event(cspmu, event);
if (ret)
return ret;
}
set_bit(idx, hw_events->used_ctrs);
return idx;

3
drivers/perf/arm_cspmu/arm_cspmu.h
View File

@ -107,6 +107,9 @@ struct arm_cspmu_impl_ops {
/* Set event filter */
void (*set_ev_filter)(struct arm_cspmu *cspmu,
struct hw_perf_event *hwc, u32 filter);
/* Implementation specific event validation */
int (*validate_event)(struct arm_cspmu *cspmu,
struct perf_event *event);
/* Hide/show unsupported events */
umode_t (*event_attr_is_visible)(struct kobject *kobj,
struct attribute *attr, int unused);