[PATCH v2 43/43] KVM: VMX: Don't do full kick when handling posted interrupt wakeup
From: Sean Christopherson <seanjc@google.com>
Date: 2021-10-09 02:17:50
Also in:
kvm, kvm-riscv, kvmarm, linux-arm-kernel, linux-riscv, lkml
Subsystem:
kernel virtual machine for x86 (kvm/x86), the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Sean Christopherson, Paolo Bonzini, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
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 need 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> --- arch/x86/kvm/vmx/posted_intr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kvm/vmx/posted_intr.c b/arch/x86/kvm/vmx/posted_intr.c
index f1bcf8c32b6d..06eb9c950760 100644
--- a/arch/x86/kvm/vmx/posted_intr.c
+++ b/arch/x86/kvm/vmx/posted_intr.c@@ -192,7 +192,7 @@ 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); } spin_unlock(&per_cpu(wakeup_vcpus_on_cpu_lock, cpu)); }
--
2.33.0.882.g93a45727a2-goog