Commit 647d5c5a authored by Ilkka Koskinen's avatar Ilkka Koskinen Committed by Will Deacon
Browse files

perf: arm_cspmu: Support implementation specific validation 



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

Signed-off-by: default avatarIlkka Koskinen <ilkka@os.amperecomputing.com>
Reviewed-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: default avatarSuzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20230913233941.9814-4-ilkka@os.amperecomputing.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 0a7603ab

drivers/perf/arm_cspmu/arm_cspmu.c

+7 −1
Original line number Diff line number Diff line
@@ -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;

drivers/perf/arm_cspmu/arm_cspmu.h

+3 −0
Original line number Diff line number Diff line
@@ -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);