See the blueprint:
https://blueprints.launchpad.net/nova/+spec/libvirt-xml-cpu-model
and specification
http://wiki.openstack.org/LibvirtXMLCPUModel
See the blueprint:
https:/ /blueprints. launchpad. net/nova/ +spec/libvirt- xml-cpu- model
and specification
http:// wiki.openstack. org/LibvirtXMLC PUModel