qemu: Add support for virtio input ccw devices

QEMU on S390 (since v2.11) can support virtio input ccw devices.
So build the qemu command line for ccw devices.

Also add test cases for virtio-{keyboard, mouse, tablet}-ccw.

Signed-off-by: Farhan Ali <alifm@linux.vnet.ibm.com>
Signed-off-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>

docs/formatdomain.html.in

@@ -6048,6 +6048,8 @@ qemu-kvm -net nic,model=? /dev/null
       sub-element <code>&lt;address&gt;</code> which can tie the
       device to a particular PCI
       slot, <a href="#elementsAddress">documented above</a>.
+      On S390, <code>address</code> can be used to provide a CCW address for
+      an input device (<span class="since">since 4.2.0</span>).
 
       For type <code>passthrough</code>, the mandatory sub-element <code>source</code>
       must have an <code>evdev</code> attribute containing the absolute path to the

src/qemu/qemu_command.c

@@ -3955,6 +3955,8 @@ qemuBuildVirtioInputDevStr(const virDomainDef *def,
 
     if (dev->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) {
         suffix = "-pci";
+    } else if (dev->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW) {
+        suffix = "-ccw";
     } else if (dev->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO) {
         suffix = "-device";
     } else {
@@ -3966,7 +3968,9 @@ qemuBuildVirtioInputDevStr(const virDomainDef *def,
 
     switch ((virDomainInputType) dev->type) {
     case VIR_DOMAIN_INPUT_TYPE_MOUSE:
-        if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_MOUSE)) {
+        if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_MOUSE) ||
+            (dev->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW &&
+             !virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_VIRTIO_MOUSE_CCW))) {
             virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
                            _("virtio-mouse is not supported by this QEMU binary"));
             goto error;
@@ -3974,7 +3978,9 @@ qemuBuildVirtioInputDevStr(const virDomainDef *def,
         virBufferAsprintf(&buf, "virtio-mouse%s,id=%s", suffix, dev->info.alias);
         break;
     case VIR_DOMAIN_INPUT_TYPE_TABLET:
-        if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_TABLET)) {
+        if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_TABLET) ||
+            (dev->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW &&
+             !virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_VIRTIO_TABLET_CCW))) {
             virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
                            _("virtio-tablet is not supported by this QEMU binary"));
             goto error;
@@ -3982,7 +3988,9 @@ qemuBuildVirtioInputDevStr(const virDomainDef *def,
         virBufferAsprintf(&buf, "virtio-tablet%s,id=%s", suffix, dev->info.alias);
         break;
     case VIR_DOMAIN_INPUT_TYPE_KBD:
-        if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_KEYBOARD)) {
+        if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_KEYBOARD) ||
+            (dev->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW &&
+             !virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_VIRTIO_KEYBOARD_CCW))) {
             virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
                            _("virtio-keyboard is not supported by this QEMU binary"));
             goto error;

tests/qemuxml2argvdata/input-virtio-ccw.args

@@ -0,0 +1,26 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/home/test \
+USER=test \
+LOGNAME=test \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu-system-s390x \
+-name QEMUGuest1 \
+-S \
+-M s390-ccw-virtio \
+-m 214 \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1803 \
+-nographic \
+-nodefaults \
+-chardev socket,id=charmonitor,path=/tmp/lib/domain--1-QEMUGuest1/monitor.sock,\
+server,nowait \
+-mon chardev=charmonitor,id=monitor,mode=readline \
+-boot c \
+-drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-virtio-disk0 \
+-device virtio-blk-ccw,devno=fe.0.0000,drive=drive-virtio-disk0,\
+id=virtio-disk0 \
+-device virtio-keyboard-ccw,id=input0,devno=fe.0.0002 \
+-device virtio-mouse-ccw,id=input1,devno=fe.0.0003 \
+-device virtio-tablet-ccw,id=input2,devno=fe.0.0004 \
+-device virtio-balloon-ccw,id=balloon0,devno=fe.0.0001

tests/qemuxml2argvdata/input-virtio-ccw.xml

@@ -0,0 +1,29 @@
+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1803</uuid>
+  <memory>219136</memory>
+  <currentMemory>219136</currentMemory>
+  <vcpu>1</vcpu>
+  <os>
+    <type arch='s390x' machine='s390-ccw-virtio'>hvm</type>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-s390x</emulator>
+    <disk type='block' device='disk'>
+      <source dev='/dev/HostVG/QEMUGuest1'/>
+      <target dev='hda' bus='virtio'/>
+      <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0'/>
+    </disk>
+    <memballoon model='virtio'>
+      <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x1'/>
+    </memballoon>
+    <input type='keyboard' bus='virtio'/>
+    <input type='mouse' bus='virtio'/>
+    <input type='tablet' bus='virtio'/>
+    <panic model='s390'/>
+  </devices>
+</domain>

tests/qemuxml2argvtest.c

@@ -3015,6 +3015,14 @@ mymain(void)
             QEMU_CAPS_VNC,
             QEMU_CAPS_DEVICE_VIRTIO_GPU_CCW);
 
+    DO_TEST("input-virtio-ccw", QEMU_CAPS_VIRTIO_CCW,
+            QEMU_CAPS_VIRTIO_KEYBOARD,
+            QEMU_CAPS_VIRTIO_MOUSE,
+            QEMU_CAPS_VIRTIO_TABLET,
+            QEMU_CAPS_DEVICE_VIRTIO_KEYBOARD_CCW,
+            QEMU_CAPS_DEVICE_VIRTIO_MOUSE_CCW,
+            QEMU_CAPS_DEVICE_VIRTIO_TABLET_CCW);
+
     if (getenv("LIBVIRT_SKIP_CLEANUP") == NULL)
         virFileDeleteTree(fakerootdir);
 

tests/qemuxml2xmloutdata/input-virtio-ccw.xml

@@ -0,0 +1,37 @@
+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1803</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='s390x' machine='s390-ccw-virtio'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-s390x</emulator>
+    <disk type='block' device='disk'>
+      <driver name='qemu' type='raw'/>
+      <source dev='/dev/HostVG/QEMUGuest1'/>
+      <target dev='hda' bus='virtio'/>
+      <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0000'/>
+    </disk>
+    <input type='keyboard' bus='virtio'>
+      <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0002'/>
+    </input>
+    <input type='mouse' bus='virtio'>
+      <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0003'/>
+    </input>
+    <input type='tablet' bus='virtio'>
+      <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0004'/>
+    </input>
+    <memballoon model='virtio'>
+      <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0001'/>
+    </memballoon>
+    <panic model='s390'/>
+  </devices>
+</domain>

tests/qemuxml2xmltest.c

@@ -1230,6 +1230,14 @@ mymain(void)
             QEMU_CAPS_DEVICE_SPAPR_PCI_HOST_BRIDGE);
 
     DO_TEST("user-aliases", NONE);
+    DO_TEST("input-virtio-ccw",
+            QEMU_CAPS_VIRTIO_CCW,
+            QEMU_CAPS_VIRTIO_KEYBOARD,
+            QEMU_CAPS_VIRTIO_MOUSE,
+            QEMU_CAPS_VIRTIO_TABLET,
+            QEMU_CAPS_DEVICE_VIRTIO_KEYBOARD_CCW,
+            QEMU_CAPS_DEVICE_VIRTIO_MOUSE_CCW,
+            QEMU_CAPS_DEVICE_VIRTIO_TABLET_CCW);
 
     /* Test disks with format probing enabled for legacy reasons.
      * New tests should not go in this section. */