On 29/04/20 11:36, Vitaly Kuznetsov wrote: > + case MSR_KVM_ASYNC_PF_ACK: > + if (data & 0x1) > + kvm_check_async_pf_completion(vcpu); > + break; Does this work if interrupts are turned off? I think in that case kvm_check_async_pf_completion will refuse to make progress. You need to make this bit stateful (e.g. 1 = async PF in progress, 0 = not in progress), and check that for page ready notifications instead of EFLAGS.IF. This probably means that; - it might be simpler to move it to the vector MSR - it's definitely much simpler to remove the #PF-based mechanism for injecting page ready notifications. Thanks, Paolo
