   </numatune>
   <os>
     <type arch="i686">hvm</type>
-    <loader>/usr/lib/xen/boot/hvmloader</loader>
-    <boot dev="hd"/>
+    <loader>foo.bar</loader>
+    <boot dev="network"/>
+    <bios useserial="yes"/>
+    <init>/bin/bash</init>
   </os>
   <features>
     <acpi/>

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