virt-manager/tests/xmlconfig-xml/boot-cpuset.xml

<domain type='xen'>
  <name>TestGuest</name>
  <uuid>12345678-1234-1234-1234-123456789012</uuid>
  <memory>409600</memory>
  <currentMemory>204800</currentMemory>
  <vcpu cpuset='0,1,2,3,4,5,6,7' current='5'>7</vcpu>
  <os>
    <type arch='i686'>hvm</type>
    <loader>/usr/lib/xen/boot/hvmloader</loader>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/><apic/>
  </features>
  <cpu mode='custom' match='minimum'>
    <model>footest</model>
    <vendor>Intel</vendor>
    <topology sockets='4' cores='5' threads='2'/>
    <feature policy='force' name='x2apic'/>
    <feature policy='forbid' name='lahf_lm'/>
  </cpu>
  <clock offset="utc"/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/lib/xen/bin/qemu-dm</emulator>
    <disk type='block' device='cdrom'>
      <target dev='hdc' bus='ide'/>
      <readonly/>
    </disk>
    <input type='mouse' bus='ps2'/>
    <graphics type='sdl' display=':3.4' xauth='/tmp/.Xauthority'/>
    <console type='pty'/>
  </devices>
</domain>