From: Yicong Yang yangyicong@hisilicon.com
[ Upstream commit aff787f64ad7cbb54614b51b82c682fe06411ef3 ]
PTT is an uncore PMU and shouldn't be attached to any task. Block the usage in pmu::event_init().
Signed-off-by: Yicong Yang yangyicong@hisilicon.com Acked-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Suzuki K Poulose suzuki.poulose@arm.com Link: https://lore.kernel.org/r/20231010084731.30450-5-yangyicong@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/hwtracing/ptt/hisi_ptt.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/hwtracing/ptt/hisi_ptt.c b/drivers/hwtracing/ptt/hisi_ptt.c index 7d2127d86c728..1d066ce8358f0 100644 --- a/drivers/hwtracing/ptt/hisi_ptt.c +++ b/drivers/hwtracing/ptt/hisi_ptt.c @@ -1000,6 +1000,9 @@ static int hisi_ptt_pmu_event_init(struct perf_event *event) return -EOPNOTSUPP; }
+ if (event->attach_state & PERF_ATTACH_TASK) + return -EOPNOTSUPP; + if (event->attr.type != hisi_ptt->hisi_ptt_pmu.type) return -ENOENT;