With heterogeneous PMUs its helpful to know which PMUs are bound
to each CPU. Provide that information with a cpumask sysfs entry
similar to other PMUs.
Signed-off-by: Jeremy Linton <jeremy.linton@xxxxxxx>
---
arch/arm64/kernel/perf_event.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c
index 356fa6c..dae73ea 100644
--- a/arch/arm64/kernel/perf_event.c
+++ b/arch/arm64/kernel/perf_event.c
@@ -533,6 +533,26 @@ static struct attribute_group armv8_pmuv3_events_attr_group = {
PMU_FORMAT_ATTR(event, "config:0-9");
+static ssize_t
+cpumask_show(struct device *dev, struct device_attribute *attr, char *page)
+{
+ struct pmu *pmu = dev_get_drvdata(dev);
+ struct arm_pmu *cpu_pmu = container_of(pmu, struct arm_pmu, pmu);
+
+ return cpumap_print_to_pagebuf(true, page, &cpu_pmu->supported_cpus);
+}
+static DEVICE_ATTR_RO(cpumask);
+
+static struct attribute *armv8_pmuv3_attrs[] = {
+ &dev_attr_cpumask.attr,
+ NULL,
+};
+
+static struct attribute_group armv8_pmuv3_attr_group = {
+ .attrs = armv8_pmuv3_attrs,
+};
+
+
static struct attribute *armv8_pmuv3_format_attrs[] = {
&format_attr_event.attr,
NULL,
@@ -544,6 +564,7 @@ static struct attribute_group armv8_pmuv3_format_attr_group = {
};
static const struct attribute_group *armv8_pmuv3_attr_groups[] = {
+ &armv8_pmuv3_attr_group,
&armv8_pmuv3_events_attr_group,
&armv8_pmuv3_format_attr_group,
NULL,
--
2.5.5
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