Received: by 2002:a05:6a10:206:0:0:0:0 with SMTP id 6csp3434855pxj; Mon, 24 May 2021 06:45:05 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzvjOCum8SHy5tBCCHdJerTsvwG8z46v1yicaylZ67r1uIn0GL+DC8B6f/AhcDtMc0e9dN1 X-Received: by 2002:a05:6e02:ec7:: with SMTP id i7mr16529688ilk.147.1621863905351; Mon, 24 May 2021 06:45:05 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1621863905; cv=none; d=google.com; s=arc-20160816; b=S4YI7Sd0tMAC9yZGiW+Gc3nNr0PJcijqBuiGBWSGhvSIrIzSeopo+dHCLIHPXYfVFO dIPbBKzNc7JL4ocKasHsxPNVCRJOD9l6EyeZNiBX22G0ERCXOjpB/wurzQWrwifiF+ev FZBiVwnMCleqGMUWDj6LWxPLnTGuAgTIeBT8hd4S06saw/GmDiv1mSVpGKr+y2VxyO8f qPz8Ko5FgNlnyf2tOvFPR9ezMIRSskMK3bsHGGZbTSqdNxZTACjHvzNxQRvCRaMvFuIj jKqTGCVHXZWPLnLKzxsjU+hNStqp3VZcEif5jzaJwnJQxjPD0eJ4oQWRLGzG9XbkEnh6 tAaQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:content-language :in-reply-to:mime-version:user-agent:date:message-id:from:references :cc:to:subject:ironport-sdr:ironport-sdr; bh=mnX2mkVBhxasAs9O/dfd+8ThLn6X8G0PPSiWwyaZj9o=; b=hqriFkBlTiQ/y5R5aYlzujG578rxjTyC3ne7ZQTEEjG2ukBPm4Zo0Etb4qx4IiQUps s0L+MtZdpZXwR1xLP+qDtRde6CwKV6Dz9Tk7xjIQ00bplqH87dhN+SHyVrhOFXUWRjYa quIpIaM6jb6DXuNGdQAGaFOxauJl/ZgNvNXFNxga8pBXbbLR52ODF+vD0YRpN3aSL1fo yXo6pGX/1GEmRv//qbtQLoq15dVRfebDHpfdSI7BIrXCHUMIldZNAdxVAX4EZkqOqGOI TUx9Nr2Nc8ZfYL3FsuyIcUwmf9QFk6p+FkrwDtr5d2uetSKwRb4VXyW93CdE9SpD2GUW f6+A== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id b10si7125534ilv.99.2021.05.24.06.44.51; Mon, 24 May 2021 06:45:05 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232685AbhEXNo0 (ORCPT + 99 others); Mon, 24 May 2021 09:44:26 -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