From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757894Ab0HCWQK (ORCPT ); Tue, 3 Aug 2010 18:16:10 -0400 Received: from cavan.codon.org.uk ([93.93.128.6]:45499 "EHLO cavan.codon.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757224Ab0HCWQI (ORCPT ); Tue, 3 Aug 2010 18:16:08 -0400 Date: Tue, 3 Aug 2010 23:15:37 +0100 From: Matthew Garrett To: "Eric W. Biederman" Cc: Huang Ying , "Tang, Feng" , Bjorn Helgaas , "linux-kernel@vger.kernel.org" Subject: Re: EFI runtime-services on x86_64 Message-ID: <20100803221537.GA4893@srcf.ucam.org> References: <201007301458.50263.bjorn.helgaas@hp.com> <20100802103535.6442ab49@feng-i7> <1280716920.2771.1519.camel@yhuang-dev> <20100803215346.GA4476@srcf.ucam.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: mjg59@cavan.codon.org.uk X-SA-Exim-Scanned: No (on cavan.codon.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 03, 2010 at 02:58:10PM -0700, Eric W. Biederman wrote: > Only if you have EFI runtime services enabled in your kernel. You can > skip the efi junk and the kernel runs just fine. Doing what we do on > every other platform which appears to be a combination of ACPI and > direct hardware access appears to be good enough, and that is a path > that actually gets tested regularly. I think wanting to set the nvram variables so that your bootloader works is a pretty typical usecase... -- Matthew Garrett | mjg59@srcf.ucam.org