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ARM: 6069/1: perf-events: use numeric ID to identify PMU

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The ARM perf-events framework provides support for a number of different
PMUs using struct arm_pmu. The char *name field of this struct can be
used to identify the PMU, but this is cumbersome if used outside of perf.

This patch replaces the name string for a PMU with an enum, which holds
a unique ID for the PMU being represented. This ID can be used to index
an array of names within perf, so no functionality is lost. The presence
of the ID field, allows other kernel subsystems [currently oprofile] to
use their own mappings for the PMU name.

Cc: Jean Pihet <jpihet@mvista.com>
Acked-by: Jamie Iles <jamie.iles@picochip.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Will Deacon
2010-04-30 11:32:44 +01:00
committed by Russell King
parent 49c006b937
commit 181193f398
2 changed files with 43 additions and 10 deletions
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14
arch/arm/include/asm/perf_event.h
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@@ -28,4 +28,18 @@ set_perf_event_pending(void)
* same indexes here for consistency. */
#define PERF_EVENT_INDEX_OFFSET 1
/* ARM perf PMU IDs for use by internal perf clients. */
enum arm_perf_pmu_ids {
ARM_PERF_PMU_ID_XSCALE1 = 0,
ARM_PERF_PMU_ID_XSCALE2,
ARM_PERF_PMU_ID_V6,
ARM_PERF_PMU_ID_V6MP,
ARM_PERF_PMU_ID_CA8,
ARM_PERF_PMU_ID_CA9,
ARM_NUM_PMU_IDS,
};
extern enum arm_perf_pmu_ids
armpmu_get_pmu_id(void);
#endif /* __ARM_PERF_EVENT_H__ */