qemu: implement address for isa-serial

I needed to specify the iobase address for certain exotic mips configurations.
Signed-off-by: NJames Cowgill <james410@cowgill.org.uk>

src/qemu/qemu_command.c

@@ -2691,6 +2691,10 @@ qemuBuildDeviceAddressStr(virBufferPtr buf,
                               info->addr.ccw.cssid,
                               info->addr.ccw.ssid,
                               info->addr.ccw.devno);
+    } else if (info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_ISA) {
+        virBufferAsprintf(buf, ",iobase=0x%x,irq=0x%x",
+                          info->addr.isa.iobase,
+                          info->addr.isa.irq);
     }
 
     ret = 0;
@@ -11071,11 +11075,15 @@ qemuBuildSerialChrDeviceStr(char **deviceStr,
             break;
 
         case VIR_DOMAIN_CHR_SERIAL_TARGET_TYPE_ISA:
-            if (serial->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE) {
+            if (serial->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE &&
+                serial->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_ISA) {
                 virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                               _("no addresses are supported for isa-serial"));
+                               _("isa-serial requires address of isa type"));
                 goto error;
             }
+
+            if (qemuBuildDeviceAddressStr(&cmd, def, &serial->info, qemuCaps) < 0)
+                goto error;
             break;
 
         case VIR_DOMAIN_CHR_SERIAL_TARGET_TYPE_PCI:

tests/qemuxml2argvdata/qemuxml2argv-serial-dev-chardev-iobase.args

+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
+/usr/bin/qemu -S -M \
+pc -m 214 -smp 1 -nographic -nodefconfig -nodefaults -chardev socket,\
+id=charmonitor,path=/tmp/test-monitor,server,nowait -mon chardev=charmonitor,\
+id=monitor,mode=readline -no-acpi -boot c -usb -hda /dev/HostVG/QEMUGuest1 -chardev \
+tty,id=charserial0,path=/dev/ttyS2 -device isa-serial,chardev=charserial0,\
+id=serial0,iobase=0x3f8,irq=0x4 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3

tests/qemuxml2argvdata/qemuxml2argv-serial-dev-chardev-iobase.xml

+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219100</memory>
+  <currentMemory unit='KiB'>219100</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>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</emulator>
+    <disk type='block' device='disk'>
+      <source dev='/dev/HostVG/QEMUGuest1'/>
+      <target dev='hda' bus='ide'/>
+      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+    </disk>
+    <controller type='usb' index='0'/>
+    <controller type='ide' index='0'/>
+    <serial type='dev'>
+      <source path='/dev/ttyS2'/>
+      <target port='0'/>
+      <address type='isa' iobase='0x3f8' irq='0x4'/>
+    </serial>
+    <console type='dev'>
+      <source path='/dev/ttyS2'/>
+      <target port='0'/>
+      <address type='isa' iobase='0x3f8' irq='0x4'/>
+    </console>
+    <memballoon model='virtio'/>
+  </devices>
+</domain>

tests/qemuxml2argvtest.c

@@ -1045,6 +1045,8 @@ mymain(void)
             QEMU_CAPS_CHARDEV, QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG);
     DO_TEST("serial-dev-chardev",
             QEMU_CAPS_CHARDEV, QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG);
+    DO_TEST("serial-dev-chardev-iobase",
+            QEMU_CAPS_CHARDEV, QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG);
     DO_TEST("serial-file-chardev",
             QEMU_CAPS_CHARDEV, QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG);
     DO_TEST("serial-unix-chardev",