Commit eebd097b authored by Hao Chen's avatar Hao Chen Committed by Jiantao Xiao
Browse files

perf: hns3: default use hardware event 0 as group leader event. 

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7BY7T


CVE: NA

----------------------------------------------------------------------

For hns3 pmu events, we use command as below before:
perf stat -g -e hns3_pmu_sicl_0/config=0x00105,global=1/
-e hns3_pmu_sicl_0/config=0x10105,global=1/ -I 1000

We want 0x00105 event and 0x10105 event share a hardware event, but for
kernel 6.2 'commit 5f8f9567 ("perf evlist: Remove group option.")'
remove -g parameter.

So add this patch to set default related event idx as 0 to share
the first hardware event.

Fixes: 66637ab1 ("drivers/perf: hisi: add driver for HNS3 PMU")
Signed-off-by: default avatarHao Chen <chenhao418@huawei.com>
parent 60ceb206

drivers/perf/hisilicon/hns3_pmu.c

+3 −1
Original line number Diff line number Diff line
@@ -804,9 +804,11 @@ static int hns3_pmu_find_related_event_idx(struct hns3_pmu *hns3_pmu, 
		if (!hns3_pmu_cmp_event(sibling, event))

			continue;



		/* Related events is used in group */

		/* Related events is used in group, else we use index 0 event as related event */

		if (sibling->group_leader == event->group_leader)

			return idx;

		else

			return 0;

	}



	/* No related event and all hardware events are used up */