self._params.add('fsdev', 'local,id=root9p,path=/,security_model=none')
self._params.add('device',
'virtio-9p-pci,fsdev=root9p,mount_tag=/dev/root')
self._params.add('fsdev', 'local,id=root9p,path=/,security_model=none')
self._params.add('device',
'virtio-9p-pci,fsdev=root9p,mount_tag=/dev/root')