s390: doc: detailed specifications for AP virtualization

This patch provides documentation describing the AP architecture and
design concepts behind the virtualization of AP devices. It also
includes an example of how to configure AP devices for exclusive
use of KVM guests.
Signed-off-by: NTony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: NPierre Morel <pmorel@linux.ibm.com>
Tested-by: NPierre Morel <pmorel@linux.ibm.com>
Tested-by: NChristian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <20181010170309.12045-7-akrowiak@linux.ibm.com>
Signed-off-by: NCornelia Huck <cohuck@redhat.com>

MAINTAINERS

@@ -96,6 +96,7 @@ F: include/hw/watchdog/wdt_diag288.h
 F: pc-bios/s390-ccw/
 F: pc-bios/s390-ccw.img
 F: target/s390x/
+F: docs/vfio-ap.txt
 K: ^Subject:.*(?i)s390x?
 T: git git://github.com/cohuck/qemu.git s390-next
 L: qemu-s390x@nongnu.org
@@ -1219,6 +1220,7 @@ F: hw/s390x/ap-bridge.c
 F: include/hw/s390x/ap-device.h
 F: include/hw/s390x/ap-bridge.h
 F: hw/vfio/ap.c
+F: docs/vfio-ap.txt
 L: qemu-s390x@nongnu.org
 
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