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authorXin Yang <xin.yang@arm.com>2023-06-13 01:34:23 +0000
committerWill Deacon <will@kernel.org>2023-06-16 10:24:12 +0100
commit95f5819738a7500b91e99151a03eb05be478ee6a (patch)
treeb89a4079e5f57ff8d552854892849cedba5a008a /drivers/perf
parentb1acb4e5601b07700fd30346a08dcb7dbfc437a7 (diff)
perf/arm_dmc620: Add cpumask
Add a cpumask for the DMC620 PMU. As it is an uncore PMU, perf userspace tool only needs to open a single counter on the CPU specified by the CPU mask for each event on a given DMC620 device. Signed-off-by: Xin Yang <xin.yang@arm.com> Reviewed-by: Robin Murphy <robin.murphy@arm.com> Link: https://lore.kernel.org/r/20230613013423.2078397-1-xin.yang@arm.com Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/perf')
-rw-r--r--drivers/perf/arm_dmc620_pmu.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/perf/arm_dmc620_pmu.c b/drivers/perf/arm_dmc620_pmu.c
index 5de06f9a4dd3..9d0f01c4455a 100644
--- a/drivers/perf/arm_dmc620_pmu.c
+++ b/drivers/perf/arm_dmc620_pmu.c
@@ -227,9 +227,31 @@ static const struct attribute_group dmc620_pmu_format_attr_group = {
.attrs = dmc620_pmu_formats_attrs,
};
+static ssize_t dmc620_pmu_cpumask_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct dmc620_pmu *dmc620_pmu = to_dmc620_pmu(dev_get_drvdata(dev));
+
+ return cpumap_print_to_pagebuf(true, buf,
+ cpumask_of(dmc620_pmu->irq->cpu));
+}
+
+static struct device_attribute dmc620_pmu_cpumask_attr =
+ __ATTR(cpumask, 0444, dmc620_pmu_cpumask_show, NULL);
+
+static struct attribute *dmc620_pmu_cpumask_attrs[] = {
+ &dmc620_pmu_cpumask_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group dmc620_pmu_cpumask_attr_group = {
+ .attrs = dmc620_pmu_cpumask_attrs,
+};
+
static const struct attribute_group *dmc620_pmu_attr_groups[] = {
&dmc620_pmu_events_attr_group,
&dmc620_pmu_format_attr_group,
+ &dmc620_pmu_cpumask_attr_group,
NULL,
};