vfio-pci. A specific driver can also be forced, using the
``<driver model='plugh'/>`` attribute.
+ * qemu: add runtime configuration option for nbdkit
+
+ Since the new nbdkit support requires a recent selinux policy that is not
+ widely available yet, it is now possible to build libvirt with nbdkit
+ support for remote disks but disabled at runtime. This behavior is
+ controlled via the storage_use_nbdkit option of the qemu driver
+ configuration file. The option will default to being disabled, but this may
+ change in a future release and can be customized with the
+ nbdkit_config_default build option.
+
* **Improvements**
* qemu: Improve migration XML use when persisting VM on destination