RHEL guest on IBM z system is not starting with reason=crashed

Issue

• RHEL guest on IBM z system (s390x) is not starting with below error in file /var/log/libvirt/qemu/guest.log :

2025-08-12 10:23:54.813+0000: panic s390: core='0' psw-mask='0x0002000180000000' psw-addr='0x0000000000000000' reason='disabled-wait'
2025-08-12 10:23:54.814+0000: shutting down, reason=crashed
2025-08-12T10:23:54.814804Z qemu-kvm: terminating on signal 15 from pid 963415 (<unknown process>)

• virsh list shows that the system is not started:

Id   Name                State
------------------------------------
 -   hostname           shut off