linux-kernel - [PATCH 4/8] drivers/perf: hisi: Extract the event filter check of L3C PMU

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Message-ID: <20250729153823.2026154-5-wangyushan12@huawei.com>
Date: Tue, 29 Jul 2025 23:38:19 +0800
From: Yushan Wang <wangyushan12@...wei.com>
To: <will@...nel.org>, <mark.rutland@....com>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
CC: <jonathan.cameron@...wei.com>, <prime.zeng@...ilicon.com>,
	<fanghao11@...wei.com>, <linuxarm@...wei.com>, <yangyicong@...ilicon.com>,
	<wangyushan12@...wei.com>
Subject: [PATCH 4/8] drivers/perf: hisi: Extract the event filter check of L3C PMU

From: Yicong Yang <yangyicong@...ilicon.com>

L3C PMU has 4 filter options which are sharing perf_event_attr::config1.
Driver will check config1 to see whether a certain event has a filter
setting. It'll be incorrect if we make use of other bits in config1
for non-filter options. So check whether each filter options are set
directly in a separate function instead.

Signed-off-by: Yicong Yang <yangyicong@...ilicon.com>
Signed-off-by: Yushan Wang <wangyushan12@...wei.com>
---
 drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
index db683dd7375c..a372dd2c07b5 100644
--- a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
@@ -204,9 +204,15 @@ static void hisi_l3c_pmu_clear_core_tracetag(struct perf_event *event)
 	}
 }
 
+static bool hisi_l3c_pmu_have_filter(struct perf_event *event)
+{
+	return hisi_get_tt_req(event) || hisi_get_tt_core(event) ||
+	       hisi_get_datasrc_cfg(event) || hisi_get_datasrc_skt(event);
+}
+
 static void hisi_l3c_pmu_enable_filter(struct perf_event *event)
 {
-	if (event->attr.config1 != 0x0) {
+	if (hisi_l3c_pmu_have_filter(event)) {
 		hisi_l3c_pmu_config_req_tracetag(event);
 		hisi_l3c_pmu_config_core_tracetag(event);
 		hisi_l3c_pmu_config_ds(event);
@@ -215,7 +221,7 @@ static void hisi_l3c_pmu_enable_filter(struct perf_event *event)
 
 static void hisi_l3c_pmu_disable_filter(struct perf_event *event)
 {
-	if (event->attr.config1 != 0x0) {
+	if (hisi_l3c_pmu_have_filter(event)) {
 		hisi_l3c_pmu_clear_ds(event);
 		hisi_l3c_pmu_clear_core_tracetag(event);
 		hisi_l3c_pmu_clear_req_tracetag(event);
-- 
2.33.0