From: Linus Torvalds <torvalds@osdl.org>
Subject: Re: [discuss] Re: 2.6.19-rc4: known unfixed regressions
	(v3)
Date: Wed, 8 Nov 2006 10:52:05 -0800 (PST)
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Cc: Andrew Morton <akpm@osdl.org>, len.brown@intel.com,
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On Wed, 8 Nov 2006, Eric W. Biederman wrote:
> =

> The implementations I have seen, I believe have all been on bridges and
> the maximum size is actually generated from the bus number below the brid=
ge.

Hmm. It might be possible to first set up the MMCONFIG thing for the =

minimum range, then read the bus numbers from the host bridge on that bus, =

and then expand the mmconfig range if necessary.

Because pretty much ANYTHING is better than trusting the BIOS tables.

That said, I'd really be a _lot_ more confident about it if we were to be =

able to read the values from the hardware itself some way. There's =

obviously a chicken-and-egg issue on mmcfg configuration, but it's one =

that the BIOS startup code also has, so I assume that there is a solution =

to that somewhere.

		Linus