From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: KVM call minutes 2013-01-29 - Port I/O
Date: Fri, 1 Feb 2013 00:37:15 +0200
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Cc: KVM devel mailing list <kvm@vger.kernel.org>,
	Juan Quintela <quintela@redhat.com>, Alexander Graf <agraf@suse.de>,
	qemu-devel <qemu-devel@nongnu.org>,
	Alex Williamson <alex.williamson@redhat.com>,
	Alon Levy <alevy@redhat.com>, Gerd Hoffmann <kraxel@redhat.com>,
	Anthony Liguori <anthony@codemonkey.ws>, qemu-ppc <qemu-ppc@nongnu.org>,
	David Gibson <david@gibson.dropbear.id.au>,
	Andreas =?iso-8859-1?Q?F=E4rber?= <afaerber@suse.de>,
	=?iso-8859-1?Q?Herv=E9?= Poussineau <hpoussin@reactos.org>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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> > Here's a more interesting example:
> > 
> > -+-[0000:01]-+-00.0  NVIDIA Corporation GT218 [GeForce G210M]
> >  |           \-00.1  NVIDIA Corporation High Definition Audio Controller
> >  \-[0000:00]-+-00.0  Intel Corporation Mobile 4 Series Chipset Memory Controller Hub
> >              +-01.0  Intel Corporation Mobile 4 Series Chipset PCI Express Graphics Port
> > 
> > This system seems to have two host bridges with VGA behind each of them.
> > There's no bridge to control VGA routing, so I don't know how the
> > selection is done.  It's possible the g210m never sees legacy VGA
> > accesses in this mode.  This bios has another mode which makes the g210m
> > the primary graphics and hides the integrated graphics, essentially the
> > same as I mention above with hiding integrated endpoint graphics when
> > plugin graphics are used.  Thanks,
> 
> Wait, those are two different busses ... and there's no bridge ? Is that
> the funky x86 multi domain crackpot where you have multiple roots with
> non overlapping bus numbers in the same domain ?
> 
> Ben.

Domain numbering on x86 comes from firmware and you know what Linus
said about firmware developers ...

-- 
MST