KVM: VMX: Don't do full kick when handling posted interrupt wakeup

When waking vCPUs in the posted interrupt wakeup handling, do exactly
that and no more.  There is no need to kick the vCPU as the wakeup
handler just needs to get the vCPU task running, and if it's in the guest
then it's definitely running.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20211208015236.1616697-21-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/vmx/posted_intr.c b/arch/x86/kvm/vmx/posted_intr.c
index 901eea44cf24baa7e3070452922053e79bf21173..aa1fe9085d77996405fb48629a5a59d030654f24 100644 (file)
--- a/arch/x86/kvm/vmx/posted_intr.c
+++ b/arch/x86/kvm/vmx/posted_intr.c
@@ -209,7 +209,7 @@ void pi_wakeup_handler(void)
                            pi_wakeup_list) {
 
                if (pi_test_on(&vmx->pi_desc))
-                       kvm_vcpu_kick(&vmx->vcpu);
+                       kvm_vcpu_wake_up(&vmx->vcpu);
        }
        raw_spin_unlock(&per_cpu(wakeup_vcpus_on_cpu_lock, cpu));
 }