From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1423603AbXD3Q0S (ORCPT ); Mon, 30 Apr 2007 12:26:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1423444AbXD3Q0P (ORCPT ); Mon, 30 Apr 2007 12:26:15 -0400 Received: from ns2.suse.de ([195.135.220.15]:37672 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1946378AbXD3QZc (ORCPT ); Mon, 30 Apr 2007 12:25:32 -0400 From: Andi Kleen Organization: SUSE Linux Products GmbH, Nuernberg, GF: Markus Rex, HRB 16746 (AG Nuernberg) To: "Eric W. Biederman" Subject: Re: [PATCH 05/12] i386: During page table initialization always set the leaf page table entries. Date: Mon, 30 Apr 2007 18:21:42 +0200 User-Agent: KMail/1.9.6 Cc: virtualization , linux-kernel@vger.kernel.org, "H. Peter Anvin" , Dave Jones , Andrew Morton , Jeremy Fitzhardinge References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200704301821.42944.ak@suse.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Monday 30 April 2007 18:03:27 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. I hadn't but i merged it now into the original patch thanks -Andi