From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1946362AbXD3QeA (ORCPT ); Mon, 30 Apr 2007 12:34:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1946369AbXD3QeA (ORCPT ); Mon, 30 Apr 2007 12:34:00 -0400 Received: from gw.goop.org ([64.81.55.164]:33733 "EHLO mail.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1946372AbXD3Qd7 (ORCPT ); Mon, 30 Apr 2007 12:33:59 -0400 Message-ID: <46361A86.70408@goop.org> Date: Mon, 30 Apr 2007 09:34:14 -0700 From: Jeremy Fitzhardinge User-Agent: Thunderbird 1.5.0.10 (X11/20070302) MIME-Version: 1.0 To: "Eric W. Biederman" CC: Andi Kleen , virtualization , linux-kernel@vger.kernel.org, "H. Peter Anvin" , Dave Jones , Andrew Morton Subject: Re: [PATCH 05/12] i386: During page table initialization always set the leaf page table entries. References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Eric W. Biederman wrote: > If we don't set the leaf page table entries it is quite possible that > will inherit and incorrect page table entry from the initial boot > page table setup in head.S. So we need to redo the effort here, > so we pick up PSE, PGE and the like. > > Hypervisors like Xen require that their page tables be read-only, > which is slightly incompatible with our low identity mappings, however > I discussed this with Jeremy he has modified the Xen early set_pte > function to avoid problems in this area. > > Andi I sent this once a part of the discussion on this issue so > you may already have this patch in your queue. > > Signed-off-by: Eric W. Biederman > Acked-by: Jeremy Fitzhardinge J