On 25/05/20 16:41, Vitaly Kuznetsov wrote:
> +     case MSR_KVM_ASYNC_PF_ACK:
> +             if (data & 0x1) {
> +                     vcpu->arch.apf.pageready_pending = false;
> +                     kvm_check_async_pf_completion(vcpu);
> +             }
> +             break;
>       case MSR_KVM_STEAL_TIME:
>  
>               if (unlikely(!sched_info_on()))
> @@ -3183,6 +3189,9 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct 
> msr_data *msr_info)
>       case MSR_KVM_ASYNC_PF_INT:
>               msr_info->data = vcpu->arch.apf.msr_int_val;
>               break;
> +     case MSR_KVM_ASYNC_PF_ACK:
> +             msr_info->data = 0;
> +             break;

How is the pageready_pending flag migrated?  Should we revert the
direction of the MSR (i.e. read the flag, and write 0 to clear it)?

Paolo

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