pseries-many-buses-2.xml

<domain type='qemu'>
  <name>guest</name>
  <uuid>1ccfd97d-5eb4-478a-bbe6-88d254c16db7</uuid>
  <memory unit='KiB'>524288</memory>
  <vcpu placement='static'>1</vcpu>
  <os>
    <type arch='ppc64' machine='pseries'>hvm</type>
  </os>
  <devices>
    <emulator>/usr/bin/qemu-system-ppc64</emulator>
    <!-- PCI buses 0 and 2 are present in the configuration, libvirt will
         have to fill in the blanks and add bus 1 -->
    <controller type='pci' index='0' model='pci-root'/>
    <controller type='pci' index='2' model='pci-root'/>
    <controller type='usb' model='none'/>
    <memballoon model='none'/>
  </devices>
</domain>