Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755537AbZDWBFY (ORCPT ); Wed, 22 Apr 2009 21:05:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752277AbZDWBFL (ORCPT ); Wed, 22 Apr 2009 21:05:11 -0400 Received: from outbound-mail-123.bluehost.com ([67.222.38.23]:43533 "HELO outbound-mail-123.bluehost.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751432AbZDWBFJ (ORCPT ); Wed, 22 Apr 2009 21:05:09 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=default; d=virtuousgeek.org; h=Received:Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References:X-Mailer:Mime-Version:Content-Type:Content-Transfer-Encoding:X-Identified-User; b=Gmqm9l+I3Pgs0/GDFMwrTvwsK4p4pqWoe/+dBnKNmrGCHygq8imDHbI78BHzPWtF0t0ri20pNBkTrPDHwPtriS8LXNFTQsYypT6aoI9laYr4TfxWpAniJjE2xTM3ssQz; Date: Wed, 22 Apr 2009 18:05:05 -0700 From: Jesse Barnes To: Yinghai Lu Cc: Ivan Kokshaysky , Ingo Molnar , Linus Torvalds , "H. Peter Anvin" , Andrew Morton , Thomas Gleixner , "linux-kernel@vger.kernel.org" , linux-pci@vger.kernel.org, yannick.roehlly@free.fr Subject: Re: [RFC PATCH 1/2] pci: don't assume pref memio are 64bit -v3 Message-ID: <20090422180505.2518e837@hobbes> In-Reply-To: <49EFBB0E.3030401@kernel.org> References: <49E99054.6050208@kernel.org> <49EA57C4.1000603@kernel.org> <20090419090208.GA30211@elte.hu> <20090419090615.GA30631@elte.hu> <20090420223305.GA15340@jurassic.park.msu.ru> <49ED0EBC.4070901@kernel.org> <20090421105629.GB17904@jurassic.park.msu.ru> <49EF9C10.6090107@kernel.org> <20090422154900.08f8f366@hobbes> <49EFBB0E.3030401@kernel.org> X-Mailer: Claws Mail 3.6.1 (GTK+ 2.16.1; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Identified-User: {10642:box514.bluehost.com:virtuous:virtuousgeek.org} {sentby:smtp auth 75.111.28.251 authed with jbarnes@virtuousgeek.org} Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2423 Lines: 57 On Wed, 22 Apr 2009 17:49:18 -0700 Yinghai Lu wrote: > Jesse Barnes wrote: > > On Wed, 22 Apr 2009 15:37:04 -0700 > > Yinghai Lu wrote: > > > >> one system with 4g installed ( there is 1g hole) > >> > >> when 4G installed. > >> BIOS put ACPI etc need the hole > >> [ 0.000000] BIOS-provided physical RAM map: > >> [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009bc00 > >> (usable) [ 0.000000] BIOS-e820: 000000000009bc00 - > >> 00000000000a0000 (reserved) [ 0.000000] BIOS-e820: > >> 00000000000e3000 - 0000000000100000 (reserved) [ 0.000000] > >> BIOS-e820: 0000000000100000 - 00000000bffa0000 (usable) > >> [ 0.000000] BIOS-e820: 00000000bffa0000 - 00000000bffae000 > >> (ACPI data) [ 0.000000] BIOS-e820: 00000000bffae000 - > >> 00000000bfff0000 (ACPI NVS) [ 0.000000] BIOS-e820: > >> 00000000bfff0000 - 00000000c0000000 (reserved) [ 0.000000] > >> BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved) > >> [ 0.000000] BIOS-e820: 00000000ffb00000 - 0000000100000000 > >> (reserved) [ 0.000000] BIOS-e820: 0000000100000000 - > >> 0000000140000000 (usable) so in kernel resource will be reserved > >> for 0xbffa0000 - 0xbfff0000 for ACPI 0x100000 - 0xbffa0000 for > >> RAM... > >> > >> and BIOS set > >> [ 0.240007] pci 0000:00:01.0: bridge 64bit mmio pref: > >> [0xbdf00000-0xddefffff] [ 0.237102] pci 0000:01:00.0: reg 10 > >> 32bit mmio: [0xc0000000-0xcfffffff] that is conflict with reserved > >> res. so it can not be reserved Kernel. > >> > >> then Kernel try to get range from 0x140000000 ( above the RAM, 5G > >> and above 4g) and set let the bridge to use it, and ATI cards to > >> use it. > >> > >> but the problem is that ATI only support 32bit ... > > > > So Ivan's patch didn't work for you for this problem? I was > > planning on applying it, but it would be nice to get some test > > results first. > > looks like Ivan patch still has some problem. Can you be more specific? :) I'd like to get this resolved properly as well, and I think the principles Ivan outlined are the right ones to follow... -- Jesse Barnes, Intel Open Source Technology Center -- 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/