On 08/22/2014 10:43 AM, Daniel P. Berrange wrote: >>> <os> >>> <type>hvm</type> >>> - <loader>/usr/lib/xen/boot/hvmloader</loader> >>> + <loader readonly='on' >>> type='rom'>/usr/lib/xen/boot/hvmloader</loader> >> >> readonly='yes' is a bit more typical of other XML constructs. >> >>> + <nvram>/var/lib/libvirt/nvram/guest_VARS.fd</nvram> >> >> You chose <nvram> to be a sibling, rather than a child, of <loader>. Is >> it legal to have <nvram> in isolation, or can it only appear when >> <loader> is present? If the former, then you are okay; if the latter, >> then I'd rather see it as a child than a sibling. > > <loader> is a long standing element whose contents is a string path. > So from a back compatibility POV we can't make <nvram> be a child > of that, even though it would make sense.
Hmm. But what if we allow a choice between: <loader type='rom'>/path/to/rom</loader> and <loader type='pflash'> <config>/path/to/config</config> <nvram>/path/to/nvram</nvram> </loader> that is, use the (optional) type='rom|pflash' for gating whether the rest of the <loader> element is a single name (old style) or structured layout (new style)? -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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