pseries-serial-compat.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>
    <controller type='usb' model='none'/>
    <!-- isa-serial has to be accepted for backwards compatibility reasons,
         but should get converted to the proper type (spapr-vty-serial) -->
    <serial type='pty'>
      <target type='isa-serial'/>
    </serial>
    <memballoon model='none'/>
  </devices>
</domain>