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Re: [Xen-devel] [PATCH V3 2/5] Config.mk: update OVMF changeset

On Thu, Oct 31, 2013 at 10:47:24AM +0100, Fabio Fantoni wrote:
> Il 30/10/2013 16:58, Wei Liu ha scritto:
> >On Wed, Oct 30, 2013 at 04:52:52PM +0100, Fabio Fantoni wrote:
> >[...]
> >>I also tried another build without change qemu repo and changet but
> >>same result.
> >>Do you have domUs working on ovmf? If yes what are differences from
> >>my test system?
> >>
> >>I tried to change also domU parameters:
> >>- removing audio, vdagent and usb redirection it changes nothing.
> >>- switch from stdvga to cirrus vga solves the performance problem,
> >>but with Precise it shows always a black screen after start of
> >>grub-efi entry, and black screen also with windows 7 installer.
> >>
> >>What domU vga you used on your tests?
> >>
> >Cirrus, because there's cirrus driver in OVMF. I don't know whether
> >there is driver for stdvga.
> >
> >Black screen is expected because there's probably something wrong with
> >OVMF / Xen. I need to check real hardware behavior to identify the
> >problem.
> >
> >>I'm trying to setup ovmf serial console, but I have no idea on where
> >>to start from. Do you have some suggestions?
> >>
> >Add serial='pty' in you HVM guest config file. I believe you can get a
> >tutorial on wiki.xen.org
> >
> >Wei.
> Thanks and sorry for the stupid question.
> Precise's boot stops with calltrace, log on attachment.
> I'll try also with latest ubuntu version (Saucy) with newer kernel
> (3.11) and with latest stable qemu version (1.6.1).
> >>Thanks for any reply.
> >>
> >>>>>>If you need more informations and/or tests tell me and I'll do/post 
> >>>>>>them.
> >>>>>>
> >>>>>>About legacy bios support that I mentioned days ago I found this
> >>>>>>document about:
> >>>>>>http://code.coreboot.org/p/seabios/source/tree/master/README.CSM
> >>>>>>Seem that need ovmf change (and probably also on hvmloader) that are
> >>>>>>not able to do.
> >>>>>>
> >>>>>>Thank for any reply and sorry for my bad english.
> This idea could be enable legacy bios and vgabioses support on
> ovmf... Is that really stupid question to not deserve an aswer?
> Thanks for any reply.

I think we need to wait until this happens in upstream.

As for the guest log, I don't have a clear idea whether it is caused by
OVMF at this stage. Null pointer deference looks just like a normal bug
but I'm not sure whether it is caused by OVMF setting up the wrong thing
very far ahead...


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