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drivers/perf: arm_pmu: add common attr group fields 

In preparation for adding common attribute groups, add an array of
attribute group pointers to arm_pmu, which will be used if the
backend hasn't already set pmu::attr_groups.

Subsequent patches will move backends over to using these, before adding
common fields.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Mark Rutland 2016-09-09 14:08:26 +01:00 committed by Will Deacon
parent d3ea42aad5
commit 86cdd72af9
2 changed files with 12 additions and 1 deletions
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3
drivers/perf/arm_pmu.c
View File

@ -1037,6 +1037,9 @@ int arm_pmu_device_probe(struct platform_device *pdev,
goto out_free;
}
if (!pmu->pmu.attr_groups)
pmu->pmu.attr_groups = pmu->attr_groups;
ret = cpu_pmu_init(pmu);
if (ret)
goto out_free;

10
include/linux/perf/arm_pmu.h
View File

@ -14,7 +14,7 @@
#include <linux/interrupt.h>
#include <linux/perf_event.h>
#include <linux/sysfs.h>
#include <asm/cputype.h>
/*
@ -77,6 +77,12 @@ struct pmu_hw_events {
struct arm_pmu *percpu_pmu;
};
enum armpmu_attr_groups {
ARMPMU_ATTR_GROUP_EVENTS,
ARMPMU_ATTR_GROUP_FORMATS,
ARMPMU_NR_ATTR_GROUPS
};
struct arm_pmu {
struct pmu pmu;
cpumask_t active_irqs;
@ -111,6 +117,8 @@ struct arm_pmu {
struct pmu_hw_events __percpu *hw_events;
struct list_head entry;
struct notifier_block cpu_pm_nb;
/* the attr_groups array must be NULL-terminated */
const struct attribute_group *attr_groups[ARMPMU_NR_ATTR_GROUPS + 1];
};
#define to_arm_pmu(p) (container_of(p, struct arm_pmu, pmu))