Re: [Qemu-devel] [v2][PATCH 4/8] xen, gfx passthrough: reserve 00:02.0 for INTEL IGD

[Chen, Tiejun]

On 2014/6/30 17:29, Gerd Hoffmann wrote:
>    Hi,
>
> > > > >                /* Make cirrues VGA S3 suspend/resume work in Windows
> > > > > XP/2003 */
> > > > >                Device (VGA)
> > > > >                {
> > > > > -               Name (_ADR, 0x00020000)
> > > > > +               // Address of the VGA (device F function 0)
> > > > > +               Name (_ADR, 0x000F0000)
> > >
> > > With this change I still didn't see anything.
> >
> > This does not match with what I see.
> >
> > Looks like linux does not care about the acpi data.  Using
>
> The acpi data doesn't matter at all for the boot screen, the vgabios
> doesn't look at it.
>
> > (d12) Scan for VGA option rom
> > (d12) Running option rom at c000:0003
>
> seabios loaded+initialized the vgabios (from the pci rom bar of the vga
> device).  Which slot the vga is installed at should not matter at all.
> seabios scans the pci bus and should find the vga with no problems no
> matter where it is.
>
> > (XEN) stdvga.c:147:d12v0 entering stdvga and caching modes
>
> Seems to have worked fine ;)
>
> > (d12) pmm call arg1=0
> > (d12) Turning on vga text mode console
> > (d12) SeaBIOS (version rel-1.7.5-0-ge51488c-20140626_113926-dcs-xen-54)
>
> At this point you should see the seabios banner at the vga screen.
>
> > And the VGA screen has the SeaBIOS messages:
> >
> > SeaBIOS (version rel-1.7.5-0-ge51488c-20140626_113926-dcs-xen-54)
> > Machine UUID 18cf5fd0-e564-49c4-b63f-e6c3c23b1294
>
> As it should be.
>
> Now the questions is why it doesn't work for Tiejun ...

Gerd and Don,

Thanks for your information.

But I have no time to validate this configuration now, I will update 
this as soon as I try Don's config file.

Thanks again.

Tiejun

> Anything in the logs?
>
> cheers,
>    Gerd