linux-kernel - Re: [patches] [patch 3/5] x86: Add PCI extended config space access for AMD Barcelona

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Message-ID: <86802c440709051542w1950e28bhb21cf5c380527a6e@mail.gmail.com>
Date:	Wed, 5 Sep 2007 15:42:31 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Andreas Herrmann" <andreas.herrmann3@....com>
Cc:	"Arne Georg Gleditsch" <argggh@...phinics.no>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Robert Richter" <robert.richter@....com>,
	"Arjan van de Ven" <arjan@...radead.org>, patches@...-64.org,
	linux-kernel@...r.kernel.org
Subject: Re: [patches] [patch 3/5] x86: Add PCI extended config space access for AMD Barcelona

On 9/5/07, Andreas Herrmann <andreas.herrmann3@....com> wrote:
> On Wed, Sep 05, 2007 at 01:05:25PM +0200, Arne Georg Gleditsch wrote:
> > "H. Peter Anvin" <hpa@...or.com> writes:
> > > You're missing the point.   How will the PCI bus transactions be
> > > different when using MMCONFIG versus your extended CF8 version?
> >
> > Conceivably this is useful if the IO hub does not support MMCONFIG
> > accesses.  The AMD 8111 does not, as far as I can see.  At least I
> > have an Opteron system where MMCONFIG is not supported, and I assume
> > it's because the 8111 doesn't provide it.  I don't know if this is
> > going to be a realistic scenario for Barcelona systems.

mmconfig is set in NB ( in new CPU), Do we still need to set mmconfig
in SB like mcp55?

YH
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