arm64: KVM: Add accessors to track guest/host only counters

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In order to effeciently switch events_{guest,host} perf counters at
guest entry/exit we add bitfields to kvm_cpu_context for guest and host
events as well as accessors for updating them.

A function is also provided which allows the PMU driver to determine
if a counter should start counting when it is enabled. With exclude_host,
we may only start counting when entering the guest.

Signed-off-by: Andrew Murray <andrew.murray@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

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Andrew Murray 2019-04-09 20:22:12 +01:00 • committed by Marc Zyngier

parent 630a16854d

commit eb41238cf1

3 changed files with 63 additions and 1 deletions

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17

arch/arm64/include/asm/kvm_host.h

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2

arch/arm64/kvm/Makefile

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45

arch/arm64/kvm/pmu.c

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