linux-kernel - [PATCH v1 1/9] perf: arm_spe: Introduce 'lds' capacity

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Message-Id: <20240827164417.3309560-2-leo.yan@arm.com>
Date: Tue, 27 Aug 2024 17:44:09 +0100
From: Leo Yan <leo.yan@....com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
	Will Deacon <will@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Mike Leach <mike.leach@...aro.org>,
	James Clark <james.clark@...aro.org>,
	John Garry <john.g.garry@...cle.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	"Liang, Kan" <kan.liang@...ux.intel.com>,
	Jonathan Cameron <jonathan.cameron@...wei.com>,
	Yicong Yang <yangyicong@...ilicon.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	coresight@...ts.linaro.org,
	linux-perf-users@...r.kernel.org
Cc: Leo Yan <leo.yan@....com>
Subject: [PATCH v1 1/9] perf: arm_spe: Introduce 'lds' capacity

This commit adds a new entry 'lds' in the capacity folder. 'lds' stands
for "loaded data source". When its value is 1, it indicates the data
source implemented, and data source packets will be recorded in the
trace data.

Signed-off-by: Leo Yan <leo.yan@....com>
---
 drivers/perf/arm_spe_pmu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c
index 9100d82bfabc..81c1e7627721 100644
--- a/drivers/perf/arm_spe_pmu.c
+++ b/drivers/perf/arm_spe_pmu.c
@@ -110,6 +110,7 @@ enum arm_spe_pmu_buf_fault_action {
 /* This sysfs gunk was really good fun to write. */
 enum arm_spe_pmu_capabilities {
 	SPE_PMU_CAP_ARCH_INST = 0,
+	SPE_PMU_CAP_LDS,
 	SPE_PMU_CAP_ERND,
 	SPE_PMU_CAP_FEAT_MAX,
 	SPE_PMU_CAP_CNT_SZ = SPE_PMU_CAP_FEAT_MAX,
@@ -118,6 +119,7 @@ enum arm_spe_pmu_capabilities {
 
 static int arm_spe_pmu_feat_caps[SPE_PMU_CAP_FEAT_MAX] = {
 	[SPE_PMU_CAP_ARCH_INST]	= SPE_PMU_FEAT_ARCH_INST,
+	[SPE_PMU_CAP_LDS]	= SPE_PMU_FEAT_LDS,
 	[SPE_PMU_CAP_ERND]	= SPE_PMU_FEAT_ERND,
 };
 
@@ -160,6 +162,7 @@ static ssize_t arm_spe_pmu_cap_show(struct device *dev,
 
 static struct attribute *arm_spe_pmu_cap_attr[] = {
 	SPE_CAP_EXT_ATTR_ENTRY(arch_inst, SPE_PMU_CAP_ARCH_INST),
+	SPE_CAP_EXT_ATTR_ENTRY(lds, SPE_PMU_CAP_LDS),
 	SPE_CAP_EXT_ATTR_ENTRY(ernd, SPE_PMU_CAP_ERND),
 	SPE_CAP_EXT_ATTR_ENTRY(count_size, SPE_PMU_CAP_CNT_SZ),
 	SPE_CAP_EXT_ATTR_ENTRY(min_interval, SPE_PMU_CAP_MIN_IVAL),
-- 
2.34.1