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Re: regression: xen domU no longer supports "type=cdrom" vbd disk

On Mon, Jun 08, 2020 at 02:26:39PM -0700, Greg A. Woods wrote:
> I use xl.cfg "disk" entries like the following to mount a virtual CDROM
> in a Xen domU:
>     'format=raw, vdev=0x5, access=ro, devtype=cdrom, target=/images/NetBSD-9.0-amd64.iso'
> However since upgrading my -current source tree I've been seeing:
> 	xenbus0: ignoring device/vbd/4 type cdrom
> As shown in this patch I had to comment out the core of the mentioned
> change to be able to use an ISO image again as a virtual CDROM again:

Actually this change matches what other OSes do with 'devtype=cdrom',
we were an outsider here.

For PV or PVH domUs you can omit the devtype keyword, it's only
needed for HVM guests (if you want to boot from the cdrom image).

Manuel Bouyer <>
     NetBSD: 26 ans d'experience feront toujours la difference

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