arm64: add support for the AMU extension v1

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The activity monitors extension is an optional extension introduced
by the ARMv8.4 CPU architecture. This implements basic support for
version 1 of the activity monitors architecture, AMUv1.

This support includes:
- Extension detection on each CPU (boot, secondary, hotplugged)
- Register interface for AMU aarch64 registers

Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

...

This commit is contained in:

Ionela Voinescu 2020-03-05 09:06:21 +00:00 • committed by Catalin Marinas

parent f8788d86ab

commit 2c9d45b43c

5 changed files with 138 additions and 1 deletions

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27

arch/arm64/Kconfig

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3

arch/arm64/include/asm/cpucaps.h

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5

arch/arm64/include/asm/cpufeature.h

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38

arch/arm64/include/asm/sysreg.h

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66

arch/arm64/kernel/cpufeature.c

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