From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756894Ab0DIUND (ORCPT ); Fri, 9 Apr 2010 16:13:03 -0400 Received: from terminus.zytor.com ([198.137.202.10]:40163 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756359Ab0DIUM7 (ORCPT ); Fri, 9 Apr 2010 16:12:59 -0400 Message-ID: <4BBF89FE.5040909@zytor.com> Date: Fri, 09 Apr 2010 13:11:42 -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: guenter.roeck@ericsson.com CC: Yinghai , Linus Torvalds , Bjorn Helgaas , Thomas Gleixner , Ingo Molnar , "linux-pci@vger.kernel.org" , "x86@kernel.org" , "linux-kernel@vger.kernel.org" , Andy Isaacson , Thomas Renninger Subject: Re: [PATCH] x86: Reserve legacy VGA MMIO area for x86_64 as well as x86_32 References: <20100407210628.28364.96982.stgit@bob.kio> <201004071705.07176.bjorn.helgaas@hp.com> <4BBD13C3.2060404@oracle.com> <201004091004.39857.bjorn.helgaas@hp.com> <4BBF5987.3010100@zytor.com> <4BBF626A.3060800@oracle.com> <4BBF70BC.3080809@zytor.com> <1270839357.1477.758.camel@groeck-laptop> In-Reply-To: <1270839357.1477.758.camel@groeck-laptop> 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 04/09/2010 11:55 AM, Guenter Roeck wrote: > On Fri, 2010-04-09 at 14:23 -0400, H. Peter Anvin wrote: >> [Adding Guenter Roeck as he was commenting on something writing to the >> VGA area...] >> >> On 04/09/2010 10:22 AM, Yinghai wrote: >>> >>> then please check this one >>> >>> update e820 at first, and later put them resource tree, but give pci BAR chance to claim >>> the range, before assign unassigned resources. >>> >>> in case some system doesn't have VGA, and use [0xa0000, ..] for mmio of some other pci devices. >>> >> >> Do we have any evidence of any such system? >> >> Either which way, the patch looks saner... >> > Yes, we have a system which does not have VGA and uses the VGA memory > space for another device. I don't know exactly what for, but I can find > out if it is relevant. > Quite. We really need to consider if that kind of devices should be supported. -hpa