static int stimer_notify_direct(struct kvm_vcpu_hv_stimer *stimer)
{
	struct kvm_vcpu *vcpu = hv_stimer_to_vcpu(stimer);
	struct kvm_lapic_irq irq = {
		.delivery_mode = APIC_DM_FIXED,
		.vector = stimer->config.apic_vector
	};

	if (lapic_in_kernel(vcpu))
		return !kvm_apic_set_irq(vcpu, &irq, NULL);
	return 0;
}