linux-kernel - [PATCH v2 1/2] perf arm-spe: Support multiple Arm SPE PMUs

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Message-Id: <20240706152035.86983-2-leo.yan@arm.com>
Date: Sat,  6 Jul 2024 16:20:34 +0100
From: Leo Yan <leo.yan@....com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Namhyung Kim <namhyung@...nel.org>,
	James Clark <james.clark@...aro.org>,
	John Garry <john.g.garry@...cle.com>,
	Will Deacon <will@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Jiri Olsa <jolsa@...nel.org>,
	"Liang, Kan" <kan.liang@...ux.intel.com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Mike Leach <mike.leach@...aro.org>,
	Kajol Jain <kjain@...ux.ibm.com>,
	coresight@...ts.linaro.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Leo Yan <leo.yan@....com>,
	James Clark <james.clark@....com>
Subject: [PATCH v2 1/2] perf arm-spe: Support multiple Arm SPE PMUs

A platform can have more than one Arm SPE PMU. For example, a system
with multiple clusters may have each cluster enabled with its own Arm
SPE instance. In such case, the PMU devices will be named 'arm_spe_0',
'arm_spe_1', and so on.

Currently, the tool only supports 'arm_spe_0'. This commit extends
support to multiple Arm SPE PMUs by detecting the substring 'arm_spe_'.

Signed-off-by: Leo Yan <leo.yan@....com>
Reviewed-by: James Clark <james.clark@....com>
---
 tools/perf/arch/arm/util/pmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/arch/arm/util/pmu.c b/tools/perf/arch/arm/util/pmu.c
index 8b7cb68ba1a8..b762f6395d16 100644
--- a/tools/perf/arch/arm/util/pmu.c
+++ b/tools/perf/arch/arm/util/pmu.c
@@ -27,7 +27,7 @@ void perf_pmu__arch_init(struct perf_pmu *pmu __maybe_unused)
 		pmu->selectable = true;
 		pmu->is_uncore = false;
 		pmu->perf_event_attr_init_default = arm_spe_pmu_default_config;
-		if (!strcmp(pmu->name, "arm_spe_0"))
+		if (strstarts(pmu->name, "arm_spe_"))
 			pmu->mem_events = perf_mem_events_arm;
 	} else if (strstarts(pmu->name, HISI_PTT_PMU_NAME)) {
 		pmu->selectable = true;
-- 
2.34.1