Re: [Qemu-devel] [PATCH V7 23/24] apci: fix PXB behaviour if used with unsupported BIOS

[Michael S. Tsirkin]

On Mon, Jun 01, 2015 at 01:40:19PM +0200, Gerd Hoffmann wrote:
> On Mo, 2015-06-01 at 12:44 +0300, Marcel Apfelbaum wrote:
> > On 05/31/2015 09:12 PM, Michael S. Tsirkin wrote:
> > > On Mon, May 25, 2015 at 06:34:01PM +0300, Marcel Apfelbaum wrote:
> > >> PXB does not work with unsupported bioses, but should
> > >> not interfere with normal OS operation.
> > >> We don't ship them anymore, but it's reasonable
> > >> to keep the work-around until we update the bios in qemu.
> > >
> > > We already did, did we not?
> > Yes, we did, but Gerd preferred to keep this patch around.
> > Adding him to thread.
> 
> seabios bundled with qemu isn't the only possible firmware.
> 
> We have ovmf, coreboot, qboot.

ovmf is especially interesting. Marcel, did you look at what
happens with pxb and ovmf?

> You might boot with old seabios for
> whatever reasons (say bisecting down something).

But then you won't have pxb, will you?

> IMO qemu should deal
> with pxe not being initialized by the firmware in a sensible way, for
> robustness reasons.
> 
> cheers,
>   Gerd
>