s390x/kvm: diag288 instruction interception and handling Intercept the diag288 requests from kvm guests, and hand the requested command to the diag288 watchdog device for further handling. Signed-off-by: Xu Wang <gesaint@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>