From: "Suzuki K. Poulose" <suzuki.poul...@arm.com> Invalidate an event if the group has a hardware event from a different PMU as we cannot schedule all of them in the same context. The perf core code won't check the group consistency until after pmu_event_init().
Signed-off-by: Suzuki K. Poulose <suzuki.poul...@arm.com> --- drivers/bus/arm-cci.c | 19 ++++++++++++++----- 1 file 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; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/