Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S967524Ab3DRXmp (ORCPT ); Thu, 18 Apr 2013 19:42:45 -0400 Received: from terminus.zytor.com ([198.137.202.10]:44011 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966999Ab3DRXmo (ORCPT ); Thu, 18 Apr 2013 19:42:44 -0400 Message-ID: <517084DA.4090401@zytor.com> Date: Thu, 18 Apr 2013 16:42:18 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130311 Thunderbird/17.0.4 MIME-Version: 1.0 To: "Bryan O'Donoghue" CC: Matt Fleming , matthew.garrett@nebula.com, linux-efi@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, Darren Hart , Josh Triplett , Ingo Molnar , Thomas Gleixner , Josh Boyer Subject: Re: [PATCH] Remove warning in efi_enter_virtual_mode References: <1366127886-31460-1-git-send-email-bryan.odonoghue.lkml@nexus-software.ie> <516EAC4A.6040202@console-pimps.org> <516F1B90.9040508@nexus-software.ie> <516FD24A.3070502@console-pimps.org> <51706E8A.7030909@nexus-software.ie> In-Reply-To: <51706E8A.7030909@nexus-software.ie> X-Enigmail-Version: 1.5.1 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1310 Lines: 41 > > "UEI" is Celtic for "We missed DOS so we burned it into your ROMS" > > I love it "maith an fear" > >> There are currently only two situations where we need to map EFI Boot >> Service regions, >> >> 1. To workaround the firmware bug described in 916f676f8 >> 2. To access the ACPI BGRT image >> >> but since we haven't seen an i386 implementation that requires either, >> this simple fix should suffice for now. Item 2. above does still work on >> i386 provided that the BGRT image is not in highmem. > > Matt, Peter, Josh, Darren. > > Given it's not possible to guarantee someone won't stuff a BGRT into > EFI_BOOT_MEMORY >= highmem eventually (and indeed the axioms of the > universe pretty much guarantee eventually it will be so) - I'd suggest > version 2. > Quite frankly, it is quite likely. > A kernel parameter - rather than a probe for BGRT - since we anticipate > BIOS bugs on the way. Pardon? Kernel parameter for what? -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/