arm: perf: make PMU probing data-driven

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The current PMU probing logic consists of a single switch statement,
which means that the core arm_pmu core in perf_event_cpu.c needs to know
about every CPU PMU variant supported by a driver using the arm_pmu
framework. This makes it rather difficult to decouple the drivers from
the (otherwise generic) probing code.

The patch refactors that switch statement to a table-driven lookup,
separating the logic and knowledge (in the form of the table). Later
patches will split the table across the relevant PMU drivers, which can
pass their tables to the generic probing function.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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Mark Rutland 2014-05-23 18:11:14 +01:00 • committed by Will Deacon

parent 0f2a21018a

commit 548a86cae4

2 changed files with 41 additions and 32 deletions

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23

arch/arm/include/asm/pmu.h

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50

arch/arm/kernel/perf_event_cpu.c

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