cli: Add virtio driver packed= option

Signed-off-by: Cole Robinson <crobinso@redhat.com>

tests/data/cli/compare/virt-install-many-devices.xml

@@ -252,7 +252,7 @@
     </controller>
     <controller type="xenbus" maxGrantFrames="64"/>
     <filesystem type="mount" accessmode="mapped">
-      <driver ats="on" iommu="off"/>
+      <driver ats="on" iommu="off" packed="on"/>
       <alias name="testfsalias"/>
       <source dir="/source"/>
       <target dir="/target"/>

tests/test_cli.py

@@ -679,7 +679,7 @@ source.reservations.managed=no,source.reservations.source.type=unix,source.reser
 --hostdev /dev/pty7,type=misc
 
 
---filesystem /source,/target,alias.name=testfsalias,driver.ats=on,driver.iommu=off
+--filesystem /source,/target,alias.name=testfsalias,driver.ats=on,driver.iommu=off,driver.packed=on
 --filesystem template_name,/,type=template,mode=passthrough
 --filesystem type=file,source=/tmp/somefile.img,target=/mount/point,accessmode=squash
 

virtinst/cli.py

@@ -3029,6 +3029,7 @@ def _add_common_device_args(cls,
     if virtio_options:
         _add_arg("driver.ats", "virtio_driver.ats", is_onoff=True)
         _add_arg("driver.iommu", "virtio_driver.iommu", is_onoff=True)
+        _add_arg("driver.packed", "virtio_driver.packed", is_onoff=True)
 
 
 def _add_device_seclabel_args(cls, list_propname, prefix=""):

virtinst/devices/device.py

@@ -16,6 +16,7 @@ class DeviceVirtioDriver(XMLBuilder):
     XML_NAME = "driver"
     ats = XMLProperty("./@ats", is_onoff=True)
     iommu = XMLProperty("./@iommu", is_onoff=True)
+    packed = XMLProperty("./@packed", is_onoff=True)
 
 
 class DeviceSeclabel(XMLBuilder):