2017-07-30 18:42 GMT+08:00 <peng.hao2@xxxxxxxxxx>:
>> 2017-07-31 0:24 GMT+08:00 Peng Hao <peng.hao2@xxxxxxxxxx>:
>
>> > when SMP VM start, AP may lost INIT because of receiving INIT between
>> > kvm_vcpu_ioctl_x86_get/set_vcpu_events.
>> >
>> > vcpu 0 vcpu 1
>> > kvm_vcpu_ioctl_x86_get_vcpu_events
>> > events->smi.latched_init=0
>> > send INIT to vcpu1
>> > set vcpu1's pending_events
>> > kvm_vcpu_ioctl_x86_set_vcpu_events
>> > events->smi.latched_init == 0
>> > clear INIT in pending_events
>> > I don't think it need set/clear kernel state according to userspace's
>> > info.
>> >
>> > Signed-off-by: Peng Hao <peng.hao2@xxxxxxxxxx>
>> > ---
>> > arch/x86/kvm/x86.c | 6 ------
>> > 1 file changed, 6 deletions(-)
>> >
>> > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
>> > index 6c7266f..393a7b7 100644
>> > --- a/arch/x86/kvm/x86.c
>> > +++ b/arch/x86/kvm/x86.c
>> > @@ -3157,12 +3157,6 @@ static int
>> > kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu,
>> > vcpu->arch.hflags |= HF_SMM_INSIDE_NMI_MASK;
>> > else
>> > vcpu->arch.hflags &= ~HF_SMM_INSIDE_NMI_MASK;
>> > - if (lapic_in_kernel(vcpu)) {
>> > - if (events->smi.latched_init)
>> > - set_bit(KVM_APIC_INIT,
>> > &vcpu->arch.apic->pending_events);
>
>> This is not correct, you will lose the INIT after live migration. I
>> just send out another patch to fix it. Thanks for the report.
>
> yes, you're right. I should modify on qemu not kernel.
There is a patch here to fix it in kvm, https://lkml.org/lkml/2017/7/30/72
Regards,
Wanpeng Li
>
>> > - else
>> > - clear_bit(KVM_APIC_INIT,
>> > &vcpu->arch.apic->pending_events);
>> > - }
>> > }
>
>
>
