diff --git a/hw/s390x/s390-hypercall.h b/hw/s390x/s390-hypercall.h
index b7ac29f444..f0ca62bcbb 100644
--- a/hw/s390x/s390-hypercall.h
+++ b/hw/s390x/s390-hypercall.h
@@ -18,6 +18,7 @@
#define DIAG500_VIRTIO_RESET 1 /* legacy */
#define DIAG500_VIRTIO_SET_STATUS 2 /* legacy */
#define DIAG500_VIRTIO_CCW_NOTIFY 3 /* KVM_S390_VIRTIO_CCW_NOTIFY */
+#define DIAG500_STORAGE_LIMIT 4
int handle_diag_500(CPUS390XState *env);
Reviewed-by: Thomas Huth <thuth@redhat.com>
Sounds very reasonable to me - but it would be good to get an
Ack/Reviewed-by from IBM folks here (in case they prefer a different
interface)... hope they'll join the discussion!