linux-kernel - Re: [patch] Make MMCONFIG space (extended PCI config space) a driver opt-in issue

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Message-ID:  <mj+md-20071222.203331.9078.nikam@ucw.cz>
Date:	Sat, 22 Dec 2007 21:36:55 +0100
From:	Martin Mares <mj@....cz>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jeff Garzik <jeff@...zik.org>, linux-kernel@...r.kernel.org,
	gregkh@...e.de, linux-pci@...ey.karlin.mff.cuni.cz
Subject: Re: [patch] Make MMCONFIG space (extended PCI config space) a driver opt-in issue

Hello!

> it's not "just a couple of chipsets", it's actually
> * a whole lot of bioses
> * at least one whole CPU generation
> * ..
> * ..
> 
> Do you really want to code all of that into your userspace access code as well?

No, I certainly don't. But I expect this to be handled reasonably in the
kernel.

If I understand the proposed patch correctly, it's only swepping the problem
under the carpet -- if you have one of the malfunctioning systems and
you happen to load a driver which wants to use the extended config
space, it crashes anyway.

				Have a nice fortnight
-- 
Martin `MJ' Mares                          <mj@....cz>   http://mj.ucw.cz/
Faculty of Math and Physics, Charles University, Prague, Czech Rep., Earth
It said, "Insert disk #3," but only two will fit!
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