arm64: wrap and generalise counter read functions

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In preparation for other uses of Activity Monitors (AMU) cycle counters,
place counter read functionality in generic functions that can reused:
read_corecnt() and read_constcnt().

As a result, implement update_freq_counters_refs() to replace
init_cpu_freq_invariance_counters() and both initialise and update
the per-cpu reference variables.

Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20201106125334.21570-2-ionela.voinescu@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Ionela Voinescu 2020-11-06 12:53:32 +00:00 • committed by Catalin Marinas

parent f8394f232b

commit 4b9cf23c17

4 changed files with 23 additions and 14 deletions

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5

arch/arm64/include/asm/cpufeature.h

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arch/arm64/include/asm/topology.h

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arch/arm64/kernel/cpufeature.c

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arch/arm64/kernel/topology.c

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