core-admin/vm-config/xen-vm-template.xml

<domain type='xen'>
  <name>{name}</name>
  <uuid>{uuid}</uuid>
  <memory unit='MiB'>{maxmem}</memory>
  <currentMemory unit='MiB'>{mem}</currentMemory>
  <vcpu placement='static'>{vcpus}</vcpu>
  <os>
    <type arch='x86_64' machine='xenpv'>linux</type>
    <kernel>{kerneldir}/vmlinuz</kernel>
    <initrd>{kerneldir}/initramfs</initrd>
    <cmdline>root=/dev/mapper/dmroot ro nomodeset console=hvc0 rd_NO_PLYMOUTH 3 {kernelopts}</cmdline>
  </os>
  <clock offset='utc' adjustment='reset'>
    <timer name="tsc" mode="native"/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>destroy</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
{rootdev}
{privatedev}
{volatiledev}
{otherdevs}
{netdev}
{pcidevs}
    <console type='pty'>
      <target type='xen' port='0'/>
    </console>
  </devices>
</domain>