``virDomainBlockResize`` allows resizing a block-device backed ``raw`` disk
of a VM without the need to specify the full size of the block device.
+ * qemu: automatic selection/binding of VFIO variant drivers
+
+ When a device is assigned to a guest using VFIO with ``<hostdev
+ managed='yes'>``, libvirt will now search the running kernel's
+ modules.alias file for the most specific match to that device for
+ a VFIO driver, and bind that driver to the device rather than
+ vfio-pci. A specific driver can also be forced, using the
+ ``<driver model='plugh'/>`` attribute.
+
* **Improvements**
* qemu: Improve migration XML use when persisting VM on destination