qemu: Watchdog IB700 is not a PCI device (RHBZ#667091).

Skip IB700 when assigning PCI slots.

Note: the I6300ESB watchdog _is_ a PCI device.

To test this: I applied this patch to libvirt-0.8.3-2.fc14 (rebasing
it slightly: qemu_command.c didn't exist in that version) and
installed this on my machine, then tested that I could successfully
add an ib700 watchdog device to a guest, start the guest, and the
ib700 was available to the guest.  I also added an i6300esb (PCI)
watchdog to another guest, and verified that libvirt assigned a PCI
device to it, that the guest could be started, and that i6300esb was
present in the guest.

Note that if you previously had a domain with a ib700 watchdog, it
would have had an <address type='pci' .../> clause added to it in the
libvirt configuration.  This patch does not attempt to remove this.
You cannot start such a domain -- qemu gives an error if you try.
With this patch you are able to remove the bogus address element
without libvirt adding it back.
Signed-off-by: NRichard W.M. Jones <rjones@redhat.com>

src/qemu/qemu_command.c

@@ -863,7 +863,7 @@ int qemuDomainPCIAddressSetNextAddr(qemuDomainPCIAddressSetPtr addrs,
  *  - VirtIO block
  *  - VirtIO balloon
  *  - Host device passthrough
- *  - Watchdog
+ *  - Watchdog (not IB700)
  *
  * Prior to this function being invoked, qemuCollectPCIAddress() will have
  * added all existing PCI addresses from the 'def' to 'addrs'. Thus this
@@ -1017,8 +1017,9 @@ qemuAssignDevicePCISlots(virDomainDefPtr def, qemuDomainPCIAddressSetPtr addrs)
             goto error;
     }
 
-    /* A watchdog */
+    /* A watchdog - skip IB700, it is not a PCI device */
     if (def->watchdog &&
+        def->watchdog->model != VIR_DOMAIN_WATCHDOG_MODEL_IB700 &&
         def->watchdog->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE) {
         if (qemuDomainPCIAddressSetNextAddr(addrs, &def->watchdog->info) < 0)
             goto error;

tests/qemuxml2argvdata/qemuxml2argv-watchdog-device.args

-LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -nodefconfig -nodefaults -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -hda /dev/HostVG/QEMUGuest1 -usb -device ib700,id=watchdog0,bus=pci.0,addr=0x3 -watchdog-action poweroff -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2
+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -nodefconfig -nodefaults -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -hda /dev/HostVG/QEMUGuest1 -usb -device ib700,id=watchdog0 -watchdog-action poweroff -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2