From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759871Ab0ENXVR (ORCPT ); Fri, 14 May 2010 19:21:17 -0400 Received: from terminus.zytor.com ([198.137.202.10]:57433 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753644Ab0ENXVP (ORCPT ); Fri, 14 May 2010 19:21:15 -0400 Message-ID: <4BEDDACD.9040704@zytor.com> Date: Fri, 14 May 2010 16:20:45 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100330 Fedora/3.0.4-1.fc12 Thunderbird/3.0.4 MIME-Version: 1.0 To: Jesse Barnes CC: Mike Travis , Bjorn Helgaas , Mike Habeck , Ingo Molnar , Thomas Gleixner , x86@kernel.org, Jacob Pan , Tejun Heo , LKML , Yinghai , "linux-pci@vger.kernel.org" , Myron Stowe Subject: Re: [Patch 1/1] x86 pci: Add option to not assign BAR's if not already assigned References: <4BEAF008.9030805@sgi.com> <201005131256.17997.bjorn.helgaas@hp.com> <4BEC5530.1000008@sgi.com> <201005131402.30759.bjorn.helgaas@hp.com> <20100514152509.3aeb37b4@virtuousgeek.org> <4BEDCFD9.7020202@sgi.com> <20100514154706.4f36f4ed@virtuousgeek.org> In-Reply-To: <20100514154706.4f36f4ed@virtuousgeek.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/14/2010 03:47 PM, Jesse Barnes wrote: > > Wow and they're using cards that want to use I/O space? Funky. It's > too late to get this into 2.6.34, but that can't be what you were > expecting... I don't see a problem with getting something like this in > for 2.6.35. > Most cards on the market provide I/O BARs as a convenience to legacy BIOSes; they don't need the I/O BAR functionality from inside a full-featured OS. There are a few, key, exceptions, mainly in the form of legacy-interface devices like UARTs and VGA (note that VGA has its own routing bits and is therefore unaffected by this problem.) -hpa