sudo apt-get install uvtool-libvirt ubuntu-virt-server

uvt-simplestreams-libvirt sync release=vivid arch=ppc64el

sudo vim /usr/share/uvtool/libvirt/template.xml
change to:
<type arch='ppc64' model='power8' >hvm</type>

sudo ppc64_cpu --smt=off
sudo modprobe kvm
sudo modprobe kvm_hv

uvt-kvm create power8vm release=vivid --password ubuntu