Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754280AbZCHVGN (ORCPT ); Sun, 8 Mar 2009 17:06:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754698AbZCHVFy (ORCPT ); Sun, 8 Mar 2009 17:05:54 -0400 Received: from terminus.zytor.com ([198.137.202.10]:33899 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754657AbZCHVFx (ORCPT ); Sun, 8 Mar 2009 17:05:53 -0400 Message-ID: <49B4330C.1060700@zytor.com> Date: Sun, 08 Mar 2009 14:05:16 -0700 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: Matthew Wilcox CC: Ingo Molnar , Yinghai Lu , Jesse Barnes , Andrew Morton , Thomas Gleixner , "linux-kernel@vger.kernel.org" , linux-pci@vger.kernel.org Subject: Re: [PATCH] x86/pci: try to detect host_bridge pci_cfg_space References: <49B1C50E.5010209@kernel.org> <49B1C69F.70904@zytor.com> <49B1C81B.5010904@zytor.com> <49B1C8C1.4090304@kernel.org> <20090308110437.GA27811@elte.hu> <20090308145803.GL25995@parisc-linux.org> In-Reply-To: <20090308145803.GL25995@parisc-linux.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1069 Lines: 27 Matthew Wilcox wrote: > On Sun, Mar 08, 2009 at 12:04:37PM +0100, Ingo Molnar wrote: >> I'd also suggest to flip around the subject line from x86/pci to >> pci/x86 - it's more of a PCI patch than a pure x86 patch. The >> same problem could affect other platforms too i suspect. > > Not all platforms expose the root bridge in PCI configuration space. > Intel ia64 platforms do have a materialised root bridge; HP's don't. > (I don't know whether Intel ship any PCIe ia64 machines or not). I > don't remember details for other platforms, but I think Intel is the odd > one out in this regard. > It's still generic PCI code, however. If there is no host bridge exposed in PCI space, the patch is a noop. -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. -- 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/