[PATCH V2 drivers/perf: hisi:] drivers/perf: hisi: fix set wrong filter mode for running events issue

From: Jijie Shao
Date: Thu Aug 31 2023 - 23:54:09 EST


From: Hao Chen <chenhao418@xxxxxxxxxx>

hns3_pmu_select_filter_mode() includes A series of mode judgments such
as global mode ,function mode, function-queue mode, port mode, port-tc
mode.

For a special scenario:
command use parameter
perf stat -a -e hns3_pmu_sicl_0/bdf=0x3700,config=0x3,queue=0x0,
and hns3_pmu_is_enabled_func_mode() has a judgement as below:
if (!(pmu_event->filter_support & HNS3_PMU_FILTER_SUPPORT_FUNC))

filter_support of event 0x3 hasn't set bit for func mode, so it can't
enter func-mode branch, and continue to func-queue mode judgement, port
judgement, port-tc mode, then enter port-tc mode.

It's not up to expectations, it shouldn't enter any modes but
return -ENOENT.

port-tc mode parameter show as below:
perf stat -a -e hns3_pmu_sicl_0/config=0x00001,port=0x0,tc=0x1

port-tc mode should use bdf parameter as 0, so, add judgement of
bdf parameter to fix it.

Signed-off-by: Hao Chen <chenhao418@xxxxxxxxxx>
Signed-off-by: Jijie Shao <shaojijie@xxxxxxxxxx>
---
changeLog:
v2: add more details in log message suggested by Will
v1 link: https://lore.kernel.org/all/20230816094619.3563784-1-shaojijie@xxxxxxxxxx/
---
drivers/perf/hisilicon/hns3_pmu.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/perf/hisilicon/hns3_pmu.c b/drivers/perf/hisilicon/hns3_pmu.c
index e0457d84af6b..2aa9cb045705 100644
--- a/drivers/perf/hisilicon/hns3_pmu.c
+++ b/drivers/perf/hisilicon/hns3_pmu.c
@@ -998,12 +998,13 @@ static bool
hns3_pmu_is_enabled_port_tc_mode(struct perf_event *event,
struct hns3_pmu_event_attr *pmu_event)
{
+ u16 bdf = hns3_pmu_get_bdf(event);
u8 tc_id = hns3_pmu_get_tc(event);

if (!(pmu_event->filter_support & HNS3_PMU_FILTER_SUPPORT_PORT_TC))
return false;

- return tc_id != HNS3_PMU_FILTER_ALL_TC;
+ return (tc_id != HNS3_PMU_FILTER_ALL_TC) && (!bdf);
}

static bool
--
2.30.0