Re: [Qemu-devel] [PATCH v3] q35: Improve sample configuration files

[Gerd Hoffmann]

On Do, 2017-02-02 at 16:35 +0100, Andrea Bolognani wrote:
> On Thu, 2017-02-02 at 15:55 +0100, Gerd Hoffmann wrote:
> > > +++ b/docs/q35-emulated.cfg
> > > 
> > > +#   00:01.0 VGA compatible controller
> > > 
> > > +[device "video"]
> > > +  driver = "VGA"
> > > +  bus = "pcie.0"
> > > +  addr = "02.0"
> > 
> > Here is a address mismatch ;)
> 
> Oh, wait, I realize where the mismatch comes from now:
> on real hardware (my laptop) the video card is plugged
> into 00:02.0, but the default one you get when you don't
> pass -nodefault to QEMU is plugged into 00:01.0!

And that depends on the chipset.  On q35 it is 01.0, whereas on pc it is
02.0 because 01.0 is occupied by the piix southbridge.

> I think we should use 00:02.0, do you agree? I would
> also use the same slot in q35-virtio-graphical.cfg.

Matter of taste really.  I have some guests where the vga is at 04.0,
works fine too.  But being consistent across all configurations makes
sense.

cheers,
  Gerd