From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752600Ab0IVWDQ (ORCPT ); Wed, 22 Sep 2010 18:03:16 -0400 Received: from terminus.zytor.com ([198.137.202.10]:33470 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751936Ab0IVWDP (ORCPT ); Wed, 22 Sep 2010 18:03:15 -0400 Message-ID: <4C9A7CE4.2070406@zytor.com> Date: Wed, 22 Sep 2010 15:02:12 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.9) Gecko/20100907 Fedora/3.1.3-1.fc13 Thunderbird/3.1.3 MIME-Version: 1.0 To: Bjorn Helgaas CC: Venkatesh Pallipadi , Prarit Bhargava , Simon Arlott , x86@kernel.org, Clemens Ladisch , linux-kernel@vger.kernel.org, Marc Jones , Jordan Crouse , Ingo Molnar , Thomas Gleixner Subject: Re: [PATCH] x86, HPET: ignore any PCI BARs that match an HPET we already know about References: <20100922201547.3197.33702.stgit@bob.kio> <4C9A6534.3060800@zytor.com> <4C9A6D83.6090301@zytor.com> <201009221552.21896.bjorn.helgaas@hp.com> In-Reply-To: <201009221552.21896.bjorn.helgaas@hp.com> 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 On 09/22/2010 02:52 PM, Bjorn Helgaas wrote: > > It really doesn't look like Windows, and therefore BIOS writers, > share your expectations about PCI BARs in E820 reserved areas. > It's likely still *safe* to make them fixed resources, but we might > be able to fix more issues if we knew how Windows avoids the problem. > *Which Windows*!? Each version of Windows works differently, with different quirks and bugs, and the BIOS vendors only ever test the currently shipping version (except sometimes on server boards.) -hpa