Merge branch kvm-arm64/pmu/reset-values into kvmarm-master/next

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Fix the reset values for our PMU emulation. As a side effect,
it allows a nice optimisation by only tracking the in-use
counters when flipping them on and off, now that we are
guaranteed not to have any spurious bit set.

* kvm-arm64/pmu/reset-values:
  KVM: arm64: Remove PMSWINC_EL0 shadow register
  KVM: arm64: Disabling disabled PMU counters wastes a lot of time
  KVM: arm64: Drop unnecessary masking of PMU registers
  KVM: arm64: Narrow PMU sysreg reset values to architectural requirements

Signed-off-by: Marc Zyngier <maz@kernel.org>

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This commit is contained in:

Marc Zyngier 2021-08-20 12:14:12 +01:00

parent c500bee1c5 7a3ba3095a

commit a4516f32f0

3 changed files with 67 additions and 12 deletions

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1

arch/arm64/include/asm/kvm_host.h

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8

arch/arm64/kvm/pmu-emul.c

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70

arch/arm64/kvm/sys_regs.c

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