It can be manipulated in standalone side https://opendev.org/openstack/tripleo-quickstart-extras/src/branch/master/roles/standalone/templates/standalone_config.yaml.j2#L32 by setting standalone_libvirt_type and take a look at devstack hack https://github.com/openstack/devstack/blob/master/lib/nova#L253-L267
It can be manipulated in standalone side https:/ /opendev. org/openstack/ tripleo- quickstart- extras/ src/branch/ master/ roles/standalon e/templates/ standalone_ config. yaml.j2# L32 by setting standalone_ libvirt_ type and take a look at devstack hack https:/ /github. com/openstack/ devstack/ blob/master/ lib/nova# L253-L267