Re: [PATCH v3] KVM: x86: do not go through vcpu in __get_kvmclock_ns

From: Radim KrÄmÃÅ
Date: Wed Nov 16 2016 - 13:13:47 EST


2016-11-16 18:31+0100, Paolo Bonzini:
> Going through the first VCPU is wrong if you follow a KVM_SET_CLOCK with
> a KVM_GET_CLOCK immediately after, without letting the VCPU run and
> call kvm_guest_time_update.
>
> To fix this, compute the kvmclock value ourselves, using the master
> clock (tsc, nsec) pair as the base and the host CPU frequency as
> the scale.
>
> Reported-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> ---

Looks good, thanks! Planned for 4.9-rc6.