From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1031396AbXEDQtq (ORCPT ); Fri, 4 May 2007 12:49:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1031398AbXEDQtq (ORCPT ); Fri, 4 May 2007 12:49:46 -0400 Received: from ebiederm.dsl.xmission.com ([166.70.28.69]:37270 "EHLO ebiederm.dsl.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1031396AbXEDQtp (ORCPT ); Fri, 4 May 2007 12:49:45 -0400 From: ebiederm@xmission.com (Eric W. Biederman) To: "H. Peter Anvin" Cc: Rusty Russell , Andi Kleen , Chris Wright , Jeremy Fitzhardinge , Zachary Amsden , Andrew Morton , Linus Torvalds , lkml - Kernel Mailing List Subject: Re: [RFC PATCH 1/3] Replace paravirt_probe with "platform type" boot header field References: <1178283582.23670.67.camel@localhost.localdomain> <1178288329.23670.86.camel@localhost.localdomain> <463B56A0.7090805@zytor.com> Date: Fri, 04 May 2007 10:48:38 -0600 In-Reply-To: <463B56A0.7090805@zytor.com> (H. Peter Anvin's message of "Fri, 04 May 2007 08:52:00 -0700") Message-ID: User-Agent: Gnus/5.110006 (No Gnus v0.6) Emacs/21.4 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org "H. Peter Anvin" writes: > Eric W. Biederman wrote: >> >> Unlikely. Unless we expect that this offset will come in non-zero. >> > > You might have to worry about that. Historically, the "zero-page" was > really just the setup code overwritten, and it's still true for a big > chunk of it. > > One of the major changes in my setup code rewrite is to start out with > an all-zero chunk of memory for this. Well as long as we are in sync with setup.S we are fine. The issue is people generating the real-mode data from scratch, when using the 32bit entry point. Eric