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-rw-r--r--drivers/bus/arm-cci.c19
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
index 84fd660..68ef6f2 100644
--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -660,12 +660,21 @@ static void cci_pmu_del(struct perf_event *event, int flags)
}
static int
-validate_event(struct cci_pmu_hw_events *hw_events,
- struct perf_event *event)
+validate_event(struct pmu *cci_pmu,
+ struct cci_pmu_hw_events *hw_events,
+ struct perf_event *event)
{
if (is_software_event(event))
return 1;
+ /*
+ * Reject groups spanning multiple HW PMUs (e.g. CPU + CCI). The
+ * core perf code won't check that the pmu->ctx == leader->ctx
+ * until after pmu->event_init(event).
+ */
+ if (event->pmu != cci_pmu)
+ return 0;
+
if (event->state < PERF_EVENT_STATE_OFF)
return 1;
@@ -687,15 +696,15 @@ validate_group(struct perf_event *event)
.used_mask = CPU_BITS_NONE,
};
- if (!validate_event(&fake_pmu, leader))
+ if (!validate_event(event->pmu, &fake_pmu, leader))
return -EINVAL;
list_for_each_entry(sibling, &leader->sibling_list, group_entry) {
- if (!validate_event(&fake_pmu, sibling))
+ if (!validate_event(event->pmu, &fake_pmu, sibling))
return -EINVAL;
}
- if (!validate_event(&fake_pmu, event))
+ if (!validate_event(event->pmu, &fake_pmu, event))
return -EINVAL;
return 0;
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