From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934928Ab3FSRhn (ORCPT ); Wed, 19 Jun 2013 13:37:43 -0400 Received: from mail.skyhub.de ([78.46.96.112]:36775 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756717Ab3FSRh3 (ORCPT ); Wed, 19 Jun 2013 13:37:29 -0400 Date: Wed, 19 Jun 2013 19:37:21 +0200 From: Borislav Petkov To: "H. Peter Anvin" Cc: Ingo Molnar , Linux EFI , Matt Fleming , Matthew Garrett , X86 ML , LKML , Borislav Petkov Subject: Re: [PATCH -v2 0/4] EFI 1:1 mapping Message-ID: <20130619173721.GI28300@pd.tnic> References: <1371491416-11037-1-git-send-email-bp@alien8.de> <20130619125243.GD11209@gmail.com> <20130619130225.GA28311@pd.tnic> <51C1E996.9070209@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <51C1E996.9070209@zytor.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 19, 2013 at 12:25:42PM -0500, H. Peter Anvin wrote: > On 06/19/2013 08:02 AM, Borislav Petkov wrote: > > > > And yet there are the Macs which reportedly cannot stomach this. > > > No, the reports are that if you use the 1:1 map as the primary address > on Macs the drivers fail... not that you can't have a 1:1 map. That's what I meant: ... cannot stomach when the 1:1 map is shoved down SetVirtualAddressMap. The thing is, if we want to have both the 1:1 map and the high map during an EFI runtime call, we would need to *always* switch the pagetable for an EFI runtime call and establish both mappings in ->trampoline_pgd beforehand. -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. --