From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752719AbaAGQgv (ORCPT ); Tue, 7 Jan 2014 11:36:51 -0500 Received: from terminus.zytor.com ([198.137.202.10]:56711 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751468AbaAGQgm (ORCPT ); Tue, 7 Jan 2014 11:36:42 -0500 Message-ID: <52CC2CDF.3000100@zytor.com> Date: Tue, 07 Jan 2014 08:35:43 -0800 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 MIME-Version: 1.0 To: joeyli CC: "Rafael J. Wysocki" , Alessandro Zummo , Matt Fleming , Matthew Garrett , Elliott@hp.com, samer.el-haj-mahmoud@hp.com, Oliver Neukum , werner@suse.com, trenn@suse.de, JBeulich@suse.com, linux-kernel@vger.kernel.org, rtc-linux@googlegroups.com, x86@kernel.org, "linux-efi@vger.kernel.org" , linux-acpi@vger.kernel.org Subject: Re: [RFC PATCH 04/14] ACPI: Add ACPI 5.0 Time and Alarm Device driver References: <1387439515-8926-1-git-send-email-jlee@suse.com> <1387439515-8926-5-git-send-email-jlee@suse.com> <52B30F43.1060306@zytor.com> <1387518099.3539.4453.camel@linux-s257.site> <52C3647B.7000708@zytor.com> <1388998707.3539.6070.camel@linux-s257.site> <52CB929C.6050403@zytor.com> <1389091244.3539.6095.camel@linux-s257.site> In-Reply-To: <1389091244.3539.6095.camel@linux-s257.site> X-Enigmail-Version: 1.6 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 On 01/07/2014 02:40 AM, joeyli wrote: > > Due to accessing CMOS through ASL need enable SMM support in OVMF, Why? The CMOS is its own ASL address space, and you need that anyway to be able to access the RTC proper. If you don't want to use it because you don't want to export any indication of a legacy RTC you should be able to just do I/O port references directly in your ASL. -hpa