diff --git a/hypervisor/arch/x86/guest/vm.c b/hypervisor/arch/x86/guest/vm.c
index 11fc3f6f8..80c15895b 100644
--- a/hypervisor/arch/x86/guest/vm.c
+++ b/hypervisor/arch/x86/guest/vm.c
@@ -854,3 +854,19 @@ enum vm_vlapic_state check_vm_vlapic_state(const struct acrn_vm *vm)
 	vlapic_state = vm->arch_vm.vlapic_state;
 	return vlapic_state;
 }
+
+/**
+ * if there is RT VM return true otherwise return false.
+ */
+bool has_rt_vm(void)
+{
+	uint16_t vm_id;
+
+	for (vm_id = 0U; vm_id < CONFIG_MAX_VM_NUM; vm_id++) {
+		if (is_rt_vm(get_vm_from_vmid(vm_id))) {
+			break;
+		}
+	}
+
+	return ((vm_id == CONFIG_MAX_VM_NUM) ? false : true);
+}
diff --git a/hypervisor/include/arch/x86/guest/vm.h b/hypervisor/include/arch/x86/guest/vm.h
index ba8ad4ff4..7dcecf727 100644
--- a/hypervisor/include/arch/x86/guest/vm.h
+++ b/hypervisor/include/arch/x86/guest/vm.h
@@ -224,6 +224,7 @@ void vrtc_init(struct acrn_vm *vm);
 
 bool is_lapic_pt_configured(const struct acrn_vm *vm);
 bool is_rt_vm(const struct acrn_vm *vm);
+bool has_rt_vm(void);
 bool is_highest_severity_vm(const struct acrn_vm *vm);
 bool vm_hide_mtrr(const struct acrn_vm *vm);
 void update_vm_vlapic_state(struct acrn_vm *vm);