s390x: smp: add tests for calls in wait state

When the SIGP interpretation facility is in use a SIGP external call to
a waiting CPU will result in an exit of the calling cpu. For non-pv
guests it's a code 56 (partial execution) exit otherwise its a code 108
(secure instruction notification) exit. Those exits are handled
differently from a normal SIGP instruction intercept that happens
without interpretation and hence need to be tested.

Signed-off-by: Nico Boehr <nrb@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Link: https://lore.kernel.org/r/20220810074616.1223561-4-nrb@linux.ibm.com


Message-Id: <20220810074616.1223561-4-nrb@linux.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>