Re: [PATCH 1/1] KVM: x86: ignore SIPIs that are received while not in wait-for-sipi state

[Paolo Bonzini]

On 03/12/20 15:33, Maxim Levitsky wrote:
> In the commit 1c96dcceaeb3
> ("KVM: x86: fix apic_accept_events vs check_nested_events"),
>
> we accidently started latching SIPIs that are received while the cpu is not
> waiting for them.
>
> This causes vCPUs to never enter a halted state.
>
> Fixes: 1c96dcceaeb3 ("KVM: x86: fix apic_accept_events vs check_nested_events")
> Signed-off-by: Maxim Levitsky <mlevitsk@xxxxxxxxxx>
> ---
>  arch/x86/kvm/lapic.c | 15 ++++++++-------


Indeed, it was done by the xchg before that commit, even if 
vcpu->arch.mp_state != KVM_MP_STATE_INIT_RECEIVED.

Paolo