From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9BB03C04FF3 for ; Mon, 24 May 2021 13:43:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7766661090 for ; Mon, 24 May 2021 13:43:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232927AbhEXNo1 (ORCPT ); Mon, 24 May 2021 09:44:27 -0400 Received: from mga01.intel.com ([192.55.52.88]:36583 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232932AbhEXNoY (ORCPT ); Mon, 24 May 2021 09:44:24 -0400 IronPort-SDR: skukgycBTupGEc/oqveYzsuQjtyyBVqsSWjo4uhgzphwilXB26cMfjraIx5jwE5QWgAWWZP5j4 grPDO0wOnWLA== X-IronPort-AV: E=McAfee;i="6200,9189,9993"; a="223091312" X-IronPort-AV: E=Sophos;i="5.82,325,1613462400"; d="scan'208";a="223091312" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 May 2021 06:42:55 -0700 IronPort-SDR: xj6m4cZ3QJ+FiRUX9g95RzhYM4oMQdGx4xwaLc+q6WdoduiqsiRCXzpZBtJSGLOBCFOhzhNnHG horj1olH75RA== X-IronPort-AV: E=Sophos;i="5.82,325,1613462400"; d="scan'208";a="614111067" Received: from bwheeler-mobl1.amr.corp.intel.com (HELO skuppusw-mobl5.amr.corp.intel.com) ([10.212.57.42]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 May 2021 06:42:55 -0700 Subject: Re: [PATCH v5 1/1] x86/acpi, x86/boot: Add multiprocessor wake-up support To: =?UTF-8?Q?Mika_Penttil=c3=a4?= , Rafael J Wysocki , Thomas Gleixner , Ingo Molnar , "H . Peter Anvin" , Peter Zijlstra Cc: Len Brown , Kuppuswamy Sathyanarayanan , Sean Christopherson , Andi Kleen , x86@kernel.org, linux-kernel@vger.kernel.org References: <20210524060221.519093-1-sathyanarayanan.kuppuswamy@linux.intel.com> <4295dab3-7675-9146-ac6e-244704ecfcca@nextfour.com> From: "Kuppuswamy, Sathyanarayanan" Message-ID: <0a663bde-c301-d326-2b19-ca52719a5855@linux.intel.com> Date: Mon, 24 May 2021 06:42:53 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <4295dab3-7675-9146-ac6e-244704ecfcca@nextfour.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 5/23/21 11:40 PM, Mika Penttilä wrote: > > So this isn't supporting suspend/resume if AP cannot started again? Yes. You are correct. It can be used only once per AP. Please find the spec reference below. /* * According to the ACPI specification r6.4, sec 5.2.12.19, the * mailbox-based wakeup mechanism cannot be used more than once * for the same CPU, so skip sending wake commands to already * awake CPU. */ -- Sathyanarayanan Kuppuswamy Linux Kernel Developer