KVM: s390: add MSA9 to cpumodel

This enables stfle.155 and adds the subfunctions for KDSA. Bit 155 is
added to the list of facilities that will be enabled when there is no
cpu model involved as MSA9 requires no additional handling from
userspace, e.g. for migration.

Please note that a cpu model enabled user space can and will have the
final decision on the facility bits for a guests.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Collin Walling <walling@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>

Documentation/virtual/kvm/devices/vm.txt

@@ -141,7 +141,8 @@ struct kvm_s390_vm_cpu_subfunc {
        u8 pcc[16];           # valid with Message-Security-Assist-Extension 4
        u8 ppno[16];          # valid with Message-Security-Assist-Extension 5
        u8 kma[16];           # valid with Message-Security-Assist-Extension 8
-       u8 reserved[1808];    # reserved for future instructions
+       u8 kdsa[16];          # valid with Message-Security-Assist-Extension 9
+       u8 reserved[1792];    # reserved for future instructions
 };
 
 Parameters: address of a buffer to load the subfunction blocks from.