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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>
This commit is contained in:
Xin Yang 2023-06-13 01:34:23 +00:00 committed by Will Deacon
parent b1acb4e560
commit 95f5819738
1 changed files with 22 additions and 0 deletions
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22
drivers/perf/arm_dmc620_pmu.c
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@ -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,
};