Re: [PATCH v2 35/43] KVM: SVM: Signal AVIC doorbell iff vCPU is in guest mode

[Paolo Bonzini]

On 27/10/21 18:08, Sean Christopherson wrote:
> > Right, so should we drop the "if (running)" check in this patch, at the same
> > time as it's adding the IN_GUEST_MODE check?
> LOL, I think we have a Three^WTwo Stooges routine going on.  This patch does
> remove avic_vcpu_is_running() and replaces it with the vcpu->mode check.  Or am
> I completely misunderstanding what your referring to?
>
> -       if (avic_vcpu_is_running(vcpu)) {
> +       /*
> +        * Signal the doorbell to tell hardware to inject the IRQ if the vCPU
> +        * is in the guest.  If the vCPU is not in the guest, hardware will
> +        * automatically process AVIC interrupts at VMRUN.
> +        */
> +       if (vcpu->mode == IN_GUEST_MODE) {
>                  int cpu = READ_ONCE(vcpu->cpu);

Nevermind, I confused svm_deliver_avic_intr with avic_kick_target_vcpus, 
which anyway you are handling in patch 36.

Paolo