KVM: s390: selftests: Add ucontrol gis routing test

Add a selftests for the interrupt routing configuration when using
ucontrol VMs.

Calling the test may trigger a null pointer dereferences on kernels not
containing the fixes in this patch series.

Signed-off-by: Christoph Schlameuss <schlameuss@linux.ibm.com>
Tested-by: Hariharan Mari <hari55@linux.ibm.com>
Reviewed-by: Hariharan Mari <hari55@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Link: https://lore.kernel.org/r/20241216092140.329196-5-schlameuss@linux.ibm.com


Message-ID: <20241216092140.329196-5-schlameuss@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>