diff options
| author | Xin Yang <xin.yang@arm.com> | 2023-06-13 01:34:23 +0000 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2023-06-16 10:24:12 +0100 |
| commit | 95f5819738a7500b91e99151a03eb05be478ee6a (patch) | |
| tree | b89a4079e5f57ff8d552854892849cedba5a008a /drivers/perf | |
| parent | b1acb4e5601b07700fd30346a08dcb7dbfc437a7 (diff) | |
| download | linux-95f5819738a7500b91e99151a03eb05be478ee6a.tar.gz | |
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.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/perf/arm_dmc620_pmu.c b/drivers/perf/arm_dmc620_pmu.c index 5de06f9a4dd3f..9d0f01c4455ad 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, }; |