Re: [Xen-devel] gfx-passthrough conflict with pxe booting?

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Wed, Aug 07, 2013 at 02:14:52PM +0100, George Dunlap wrote:
> On Wed, Aug 7, 2013 at 11:12 AM, G.R. <firemeteor@xxxxxxxxxxxxxxxxxxxxx> 
> wrote:
> > A quick update about the root cause of this issue:
> > The rombios BIOS used in xen restrict itself to i440FX emulated by Bochs / 
> > qemu.
> > With gfx-passthrough, the pci-host bridge in the domU is replaced by
> > the device in the host machine.
> > This makes PCI emulation fail.
> > The issue can be fixed by simply commenting out this line:
> >
> > diff --git a/tools/firmware/rombios/rombios.c 
> > b/tools/firmware/rombios/rombios.c
> > index 80980b6..e9c5c4a 100644
> > --- a/tools/firmware/rombios/rombios.c
> > +++ b/tools/firmware/rombios/rombios.c
> > @@ -220,7 +220,7 @@
> >  // define this if you want to make PCIBIOS working on a specific bridge 
> > only
> >  // undef enables PCIBIOS when at least one PCI device is found
> >  // i440FX is emulated by Bochs and QEMU
> > -#define PCI_FIXED_HOST_BRIDGE 0x12378086 ;; i440FX PCI bridge
> > +//#define PCI_FIXED_HOST_BRIDGE 0x12378086 ;; i440FX PCI bridge
> >
> >  // #20  is dec 20
> >  // #$20 is hex 20 = 32
> 
> Ian, is this in your territory?
> 

one year later.. ping! :)


>  -George
> 


-- Pasi


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