[PATCH 0/2] KVM: arm64: PMU: Preserve vPMC registers properly on migration

[Marc Zyngier]

On Thu, 02 Mar 2023 05:50:31 +0000,
Reiji Watanabe <reijiw at google.com> wrote:
> 
> The series fixes two problems in preserving vPMU counter (vPMC)
> registers (PMCCNTR_EL0/PMEVCNTR<n>_EL0) during migration.
> 
> One of the problems is that KVM may not return the current values
> of the vPMC registers for KVM_GET_ONE_REG.
> 
> The other one might cause KVM to reset the vPMC registers on the
> first KVM_RUN on the destination. This is because userspace might
> save PMCR_EL0 with PMCR_EL0.{C,P} bits set on the source, and
> restore it on the destination.

This looks good to me. Can you please add the relevant Fixes: tags and
a Cc: to stable? With that, that'd be a candidate for -rc3, I think.

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.