arm_pmu: Change API to support 64bit counter values

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Convert the {read/write}_counter APIs to handle 64bit values
to enable supporting chained event counters. The backends still
use 32bit values and we pass them 32bit values only. So in effect
there are no functional changes.

Cc: Will Deacon <will.deacon@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Julien Thierry <julien.thierry@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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This commit is contained in:

Suzuki K Poulose 2018-07-10 09:57:59 +01:00 • committed by Will Deacon

parent 8d3e994241

commit 3a95200d3f

5 changed files with 14 additions and 15 deletions

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4

arch/arm/kernel/perf_event_v6.c

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4

arch/arm/kernel/perf_event_v7.c

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arch/arm/kernel/perf_event_xscale.c

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arch/arm64/kernel/perf_event.c

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include/linux/perf/arm_pmu.h

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