Re: [Xen-devel] qemu-xen-dir + PCI passthrough = BOOM

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Thu, Jan 09, 2014 at 05:36:40PM +0200, Pasi Kärkkäinen wrote:
> > > 
> > > I can boot the guest.
> > 
> > And can you access the ROM from the guest ?
> > 
> > 
> > Also, I have another patch, it will initialize the PCI ROM BAR like any
> > other BAR. In this case, if qemu is envolved in the access to ROM, it
> > will print an error, like it the case for other BAR. 
> > 
> > I tried to test it, but it was with an embedded VGA card. When I dump
> > the ROM, I got the same one as the emulated card instead of the ROM from
> > the device.
> > 
> 
> This issue has been reported multiple times on the list, and discussed during 
> the last couple of months on another threads,
> mostly related to GPU passthru.
> 
> I think some clues were found recently about why you get the emulated rom 
> instead of the actual device rom.
> Sorry that I don't have the link available right now..
> 

Heh.. it seems it was Konrad in this very same thread :)

http://lists.xen.org/archives/html/xen-devel/2013-12/msg02837.html


-- Pasi 


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