18.2.2.

# virsh edit windows-vm

<features>
  [...]
  <hyperv>
    <relaxed state='on'/>
    <vapic state='on'/>
    <spinlocks state='on' retries='8191'/>
    <vpindex state='on'/>
    <runtime state='on' />
    <synic state='on'/>
    <stimer state='on'>
      <direct state='on'/>
    </stimer>
    <frequencies state='on'/>
  </hyperv>
  [...]
</features>

<clock offset='localtime'>
  ...
  <timer name='hypervclock' present='yes'/>
</clock>