Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753633AbYAMRET (ORCPT ); Sun, 13 Jan 2008 12:04:19 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752955AbYAMREE (ORCPT ); Sun, 13 Jan 2008 12:04:04 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:40531 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752226AbYAMREC (ORCPT ); Sun, 13 Jan 2008 12:04:02 -0500 Date: Sun, 13 Jan 2008 09:03:11 -0800 From: Arjan van de Ven To: tcamuso@redhat.com Cc: Ivan Kokshaysky , Greg KH , Matthew Wilcox , Linus Torvalds , Greg KH , linux-kernel@vger.kernel.org, Jeff Garzik , linux-pci@atrey.karlin.mff.cuni.cz, Benjamin Herrenschmidt , Martin Mares , Loic Prylli , Prarit Bhargava , "Chumbalkar, Nagananda" , "Schoeller, Patrick (Linux - Houston, TX)" , Bhavana Nagendra Subject: Re: [Patch v2] Make PCI extended config space (MMCONFIG) a driver opt-in Message-ID: <20080113090311.0a9a1db5@laptopd505.fenrus.org> In-Reply-To: <478A075F.7010503@redhat.com> References: <20080111204228.GP18741@parisc-linux.org> <20080111211753.GR18741@parisc-linux.org> <20080111213803.GS18741@parisc-linux.org> <20080111235856.GA16079@jurassic.park.msu.ru> <20080112002638.GA18710@kroah.com> <20080112144030.GA19279@jurassic.park.msu.ru> <20080112094557.71f5382a@laptopd505.fenrus.org> <20080112214911.GA20102@jurassic.park.msu.ru> <20080112150120.05f93768@laptopd505.fenrus.org> <47895767.3090503@redhat.com> <20080112164006.6f6f7bc2@laptopd505.fenrus.org> <47896B3B.2000108@redhat.com> <20080112204248.29abb1dd@laptopd505.fenrus.org> <478A075F.7010503@redhat.com> Organization: Intel X-Mailer: Claws Mail 3.0.2 (GTK+ 2.12.1; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1627 Lines: 49 On Sun, 13 Jan 2008 07:43:11 -0500 Tony Camuso wrote: > Arjan van de Ven wrote: > > On Sat, 12 Jan 2008 20:36:59 -0500 > > Tony Camuso wrote: > > > > > > Just about NOBODY has devices that need the extended config space. > > At all. > > The PCI express spec requires the platform to provide access to this > space for express-compliance. PLATFORM not OS :) Windows isn't using it in the server space, and only in the client space it recently started considering it. > More devices will be using this space > as express becomes the dominant IO bus technology. sure in like 2009 maybe. > Which is why Loic's proposal and Ivan's implementation of it is so > elegant. It solves all these problems in one sweep, and eliminates > the code rendered cruft by Ivan's patch. A two-fer, by my reckoning. > > >> In other words, for x86, I don't think we need to worry about Port > >> IO config access ever going away at all. > > > > You're wrong there. Sad to say, but you're wrong there. > > > > The PCI spec provides for conf1 as an architected solution. It's not > going away, and especially not in x86 land where Port IO is built-in > to the CPU. again sadly you're wrong. -- If you want to reach me at my work email, use arjan@linux.intel.com For development, discussion and tips for power savings, visit http://www.lesswatts.org -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/