diff --git a/arch/s390/include/asm/sigp.h b/arch/s390/include/asm/sigp.h
index c002cd529c7158ab1fda9a41fd8d21ef7b630799..d091aa1aaf118e6ab3767c863d2813e84e99c077 100644
--- a/arch/s390/include/asm/sigp.h
+++ b/arch/s390/include/asm/sigp.h
@@ -5,6 +5,7 @@
 #define SIGP_SENSE		      1
 #define SIGP_EXTERNAL_CALL	      2
 #define SIGP_EMERGENCY_SIGNAL	      3
+#define SIGP_START		      4
 #define SIGP_STOP		      5
 #define SIGP_RESTART		      6
 #define SIGP_STOP_AND_STORE_STATUS    9
diff --git a/arch/s390/kvm/sigp.c b/arch/s390/kvm/sigp.c
index 509547d4fca10f94b768190dc01b1aadf04df342..87c2b3a3bd3ed6f889c987de9610152959296a7b 100644
--- a/arch/s390/kvm/sigp.c
+++ b/arch/s390/kvm/sigp.c
@@ -455,6 +455,11 @@ int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu)
 		rc = __sigp_sense_running(vcpu, cpu_addr,
 					  &vcpu->run->s.regs.gprs[r1]);
 		break;
+	case SIGP_START:
+		rc = sigp_check_callable(vcpu, cpu_addr);
+		if (rc == SIGP_CC_ORDER_CODE_ACCEPTED)
+			rc = -EOPNOTSUPP;    /* Handle START in user space */
+		break;
 	case SIGP_RESTART:
 		vcpu->stat.instruction_sigp_restart++;
 		rc = sigp_check_callable(vcpu, cpu_addr);