Re: qemu-xen-dir + PCI passthrough = BOOM

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Sun, Dec 22, 2013 at 11:25:20AM +0000, Wu, Feng wrote:
> 
> 
> > -----Original Message-----
> > From: xen-devel-bounces@lists.xen.org
> > [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Ian Campbell
> > Sent: Thursday, December 19, 2013 12:13 AM
> > To: Konrad Rzeszutek Wilk
> > Cc: Anthony PERARD; xen-devel@lists.xenproject.org;
> > stefano.stabellini@citrix.com
> > Subject: Re: [Xen-devel] qemu-xen-dir + PCI passthrough = BOOM
> > 
> > On Wed, 2013-12-18 at 10:22 -0500, Konrad Rzeszutek Wilk wrote:
> > > load_roms and bios_load are not set - so it wouldn't even do it.
> > > It only does it for Bochs BIOS.
> > 
> > Right, this is deliberate.
> > 
> > For ROMBIOS (AKA BOchs BIOS) hvmloader loads the options roms. and I
> > think ROMBIOS subsequently loads them.
> > 
> > For SeaBIOS it is the BIOS itself which both loads and executes the
> > ROMS, which is why it is NULL in hvmloader.
> > 
> > The SeaBIOS way is far more like how systems normally work and because
> > the BIOS is in charge it can do a better job than splitting it between
> > two entities.
> > 
> 
> I am also interested in this thread. Do you know why ROMBIOS doesn't handle
> option ROM the same way as seaBIOS? Is there any special case that ROMBIOS
> cannot handle? Thanks!

When I find out I will make sure to notify you as well.

Thanks!