From 95f5819738a7500b91e99151a03eb05be478ee6a Mon Sep 17 00:00:00 2001 From: Xin Yang Date: Tue, 13 Jun 2023 01:34:23 +0000 Subject: [PATCH] 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 Reviewed-by: Robin Murphy Link: https://lore.kernel.org/r/20230613013423.2078397-1-xin.yang@arm.com Signed-off-by: Will Deacon --- drivers/perf/arm_dmc620_pmu.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) 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, }; -- 2.30.2