[PATCH v6 3/4] perf: arm_cspmu: Support implementation specific validation
From: Ilkka Koskinen <hidden>
Date: 2023-08-15 06:37:19
Also in:
linux-doc, lkml
Subsystem:
arm pmu profiling and debugging, the rest · Maintainers:
Will Deacon, Mark Rutland, Linus Torvalds
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 <redacted> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> --- drivers/perf/arm_cspmu/arm_cspmu.c | 8 +++++++- drivers/perf/arm_cspmu/arm_cspmu.h | 3 +++ 2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/arm_cspmu.c
index 94f6856ec786..585ce96ac03f 100644
--- a/drivers/perf/arm_cspmu/arm_cspmu.c
+++ b/drivers/perf/arm_cspmu/arm_cspmu.c@@ -572,7 +572,7 @@ 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)) {
@@ -606,6 +606,12 @@ 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;
diff --git a/drivers/perf/arm_cspmu/arm_cspmu.h b/drivers/perf/arm_cspmu/arm_cspmu.h
index 274ca3d10578..05577f74b8a0 100644
--- a/drivers/perf/arm_cspmu/arm_cspmu.h
+++ b/drivers/perf/arm_cspmu/arm_cspmu.h@@ -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);
--
2.41.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel