void kvm_vcpu_update_apicv(struct kvm_vcpu *vcpu)
{
+ bool activate;
+
if (!lapic_in_kernel(vcpu))
return;
mutex_lock(&vcpu->kvm->arch.apicv_update_lock);
- vcpu->arch.apicv_active = kvm_apicv_activated(vcpu->kvm);
+ activate = kvm_apicv_activated(vcpu->kvm);
+ if (vcpu->arch.apicv_active == activate)
+ goto out;
+
+ vcpu->arch.apicv_active = activate;
kvm_apic_update_apicv(vcpu);
static_call(kvm_x86_refresh_apicv_exec_ctrl)(vcpu);
if (!vcpu->arch.apicv_active)
kvm_make_request(KVM_REQ_EVENT, vcpu);
+out:
mutex_unlock(&vcpu->kvm->arch.apicv_update_lock);
}
EXPORT_SYMBOL_GPL(kvm_vcpu_update_apicv);