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Re: [Xen-devel] unable to boot from cdrom using OVMF in latest xen-unstable

On Wed, Jul 29, 2015 at 12:19:33PM +0200, Fabio Fantoni wrote:
> Il 29/07/2015 11:40, Wei Liu ha scritto:
> >On Wed, Jul 29, 2015 at 11:31:30AM +0200, Fabio Fantoni wrote:
> >>Today I retried ovmf after long time from previous, I tried old fedora 20
> >>uefi domUs and still boot correctly but trying to boot from cdrom using
> >>boot='dc' or boot='d' don't boot from cdrom (seems didn't try) but boot from
> >>harddisk (even with boot='d').
> >>After booting fedora I checked the cdrom and see it correctly, the problem
> >>seems only about boot order.
> >>xen is build from staging git based on commit
> >>44313ab77f3e3c5b566ea4f23b0e32bfd5eafa29 and ovmf is from debian package
> >>0~20150106.5c2d456b-1.
> >>
> >>If you need more informations/tests tell me and I'll post them.
> >>
> >>Thanks for any reply and sorry for my bad english.
> >What has changed in your setup? I guess it's only Xen? Do you use the
> >same OVMF image all the time?
> >
> >If the only thing changed is Xen, I would suggest you bisect the
> >hypervisor. There were a bunch of changes in emulation code there.
> >If you don't have a base line version, I will try to come up with one
> >for you.
> >
> >Wei.
> Thanks for reply, I did other tests and I found that having empty harddrive
> boot from cdrom correctly also with omvf, the problem seems that not cosider
> boot option at all.

Or maybe your CD image is mastered so that when hard drive has
meaningful boot record it chooses to boot from hard drive?

> I did also few tests about ovmf and if I remember good is the first time I
> try to boot from cdrom on domUs with harddrive not empty, other time I did
> it only for system install, then is probable that the is present also in
> older xen and ovmf versions.

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