     <panic>
       <address type="isa" iobase="0x505"/>
     </panic>
+    <hostdev mode="subsystem" type="pci" managed="yes">
+      <source>
+        <address domain="0" bus="0" slot="25" function="0"/>
+      </source>
+    </hostdev>
   </devices>
 </domain>

Domain 'test-many-devices' defined successfully.
Changes will take effect after the next domain shutdown.