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

<domain type='xen'>
  <name>{name}</name>
  {uuidnode}
  <memory unit='MiB'>{maxmem}</memory>
  <currentMemory unit='MiB'>{mem}</currentMemory>
  <vcpu placement='static'>{vcpus}</vcpu>
  <os>
    <type arch='x86_64' machine='xenfv'>hvm</type>
    <loader>hvmloader</loader>
    <boot dev='cdrom'/>
    <boot dev='hd'/>
  </os>
  <features>
    <pae/>
    <acpi/>
    <apic/>
    <viridian/>
    {features}
  </features>
  <clock offset='variable' adjustment='{timeoffset}' basis='{time_basis}'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>destroy</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    {no_network_begin}<emulator type='stubdom'/>{no_network_end}
    {network_begin}<emulator type='stubdom' cmdline='-net lwip,client_ip={ip},server_ip={dns2},dns={dns1},gw={gateway},netmask={netmask}'/>{network_end}
{rootdev}
{privatedev}
{otherdevs}
{netdev}
{pcidevs}
    <input type='tablet' bus='usb'/>
    <video type='vga'>
      <model type='xen' vram='16384'/>
    </video>
  </devices>
</domain>