libvirt/tests/domaincapsschemadata/libxl-xenpv-usb.xml

<domainCapabilities>
  <path>/usr/bin/qemu-system-x86_64</path>
  <domain>xen</domain>
  <machine>xenpv</machine>
  <arch>x86_64</arch>
  <vcpu max='512'/>
  <os supported='yes'>
    <loader supported='no'/>
  </os>
  <cpu>
    <mode name='host-passthrough' supported='no'/>
    <mode name='host-model' supported='no'/>
    <mode name='custom' supported='no'/>
  </cpu>
  <devices>
    <disk supported='yes'>
      <enum name='diskDevice'>
        <value>disk</value>
        <value>cdrom</value>
      </enum>
      <enum name='bus'>
        <value>ide</value>
        <value>scsi</value>
        <value>xen</value>
      </enum>
    </disk>
    <graphics supported='yes'>
      <enum name='type'>
        <value>sdl</value>
        <value>vnc</value>
        <value>spice</value>
      </enum>
    </graphics>
    <video supported='yes'>
      <enum name='modelType'>
        <value>vga</value>
        <value>cirrus</value>
        <value>xen</value>
      </enum>
    </video>
    <hostdev supported='yes'>
      <enum name='mode'>
        <value>subsystem</value>
      </enum>
      <enum name='startupPolicy'>
        <value>default</value>
        <value>mandatory</value>
        <value>requisite</value>
        <value>optional</value>
      </enum>
      <enum name='subsysType'>
        <value>usb</value>
        <value>pci</value>
      </enum>
      <enum name='capsType'/>
      <enum name='pciBackend'>
        <value>xen</value>
      </enum>
    </hostdev>
  </devices>
  <features>
    <gic supported='no'/>
  </features>
</domainCapabilities>