From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751885AbaB1GkY (ORCPT ); Fri, 28 Feb 2014 01:40:24 -0500 Received: from mga02.intel.com ([134.134.136.20]:2707 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751247AbaB1GkX (ORCPT ); Fri, 28 Feb 2014 01:40:23 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,560,1389772800"; d="scan'208";a="483355663" Message-ID: <53102F3C.4020806@linux.intel.com> Date: Fri, 28 Feb 2014 14:39:56 +0800 From: "Li, Aubrey" User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: Matthew Garrett CC: "alan@linux.intel.com" , linux-kernel@vger.kernel.org, "H. Peter Anvin" , Len.Brown@intel.com, Adam Williamson Subject: Re: [patch] x86: Introduce BOOT_EFI and BOOT_CF9 into the reboot sequence loop References: <53100C8D.1060001@linux.intel.com> <20140228045637.GA28257@srcf.ucam.org> <53101D1D.9010202@linux.intel.com> <20140228055629.GA847@srcf.ucam.org> <531027BE.2010807@linux.intel.com> <20140228061254.GA2226@srcf.ucam.org> <53102AB9.40600@linux.intel.com> <20140228062325.GA3246@srcf.ucam.org> In-Reply-To: <20140228062325.GA3246@srcf.ucam.org> 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 2014/2/28 14:23, Matthew Garrett wrote: > On Fri, Feb 28, 2014 at 02:20:41PM +0800, Li, Aubrey wrote: > >> Well, I already figured that out. Reset Register Supported flag is ZERO >> in FACP table. I attached this table for your interesting. > > Ok, in that case we need to check how Windows deals with a FACP that has > this flag set to 0 but valid looking registers defined. I'll see if I > can do that tomorrow. > Just let you know, Windows8.1 calls EFI on these boxes for reboot/shutdown. I'll be surprise if other windows version ignores RESET_REG_SUP to use ACPI reset registers. =========ACPI spec ============================== RESET_REG_SUP: If set, indicates the system supports system reset via the FADT RESET_REG as described in Section 4.8.3.6 ================================================= Thanks for checking that, please keep me posted. I'll re-submit the patch after you have an update. -Aubrey