From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759368Ab2IFRHW (ORCPT ); Thu, 6 Sep 2012 13:07:22 -0400 Received: from terminus.zytor.com ([198.137.202.10]:46071 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759132Ab2IFRHU (ORCPT ); Thu, 6 Sep 2012 13:07:20 -0400 Message-ID: <5048D83D.8000408@zytor.com> Date: Thu, 06 Sep 2012 10:07:09 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120828 Thunderbird/15.0 MIME-Version: 1.0 To: Matt Fleming CC: Jan Beulich , Vasco Dias , Matthew Garrett , linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, cJ-ko@zougloub.eu Subject: Re: [PATCH] x86, efi: 1:1 pagetable mapping for virtual EFI calls References: <1346937309-1581-1-git-send-email-matt@console-pimps.org> <5048D09A020000780009965B@nat28.tlf.novell.com> <1346946465.4244.107.camel@mfleming-mobl1.ger.corp.intel.com> In-Reply-To: <1346946465.4244.107.camel@mfleming-mobl1.ger.corp.intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Anyone care to refresh my memory why we can't use the "global" 1:1+kernel map, possibly with some improvements (which would benefit the users of those maps too)? With that I mean initial_page_map on i386 and trampoline_pgd on x86-64... -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.