attributes: <code>iobase</code> and <code>irq</code>.
<span class="since">Since 1.2.1</span>
</dd>
+ <dt><code>unassigned</code></dt>
+ <dd>For PCI hostdevs, <code><address type='unassigned'/></code>
+ allows the admin to include a PCI hostdev in the domain XML definition,
+ without making it available for the guest. This allows for configurations
+ in which Libvirt manages the device as a regular PCI hostdev,
+ regardless of whether the guest will have access to it.
+ <code><address type='unassigned'/></code> is an invalid address
+ type for all other device types.
+ <span class="since">Since 6.0.0</span>
+ </dd>
</dl>
<h4><a id="elementsVirtio">Virtio-related options</a></h4>