lkml.org 
[lkml]   [2021]   [Oct]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH v2 35/43] KVM: SVM: Signal AVIC doorbell iff vCPU is in guest mode
From
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

\
 
 \ /
  Last update: 2021-10-27 18:15    [W:0.075 / U:0.572 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site