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=-3.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_GIT autolearn=ham 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 04E67C43441 for ; Mon, 19 Nov 2018 21:44:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B4CF420870 for ; Mon, 19 Nov 2018 21:44:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=soleen.com header.i=@soleen.com header.b="axKNw1Pk" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B4CF420870 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=soleen.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731267AbeKTIKX (ORCPT ); Tue, 20 Nov 2018 03:10:23 -0500 Received: from mail-qk1-f194.google.com ([209.85.222.194]:38865 "EHLO mail-qk1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731082AbeKTIKX (ORCPT ); Tue, 20 Nov 2018 03:10:23 -0500 Received: by mail-qk1-f194.google.com with SMTP id d19so51253501qkg.5 for ; Mon, 19 Nov 2018 13:44:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=soleen.com; s=google; h=from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=0UloynJx4FD/pgAzOgUkwGUsAXEVRg/vVo9Gep3eslQ=; b=axKNw1Pk+n3TbtNQl91iKltb06dXmDlBM8GXD+DQwsuCSOl0JZze1Qa/AM+qxSnmSV 0KgWmG/UoZA4SCl6CWcCQERX1SSM3cgBS+0QVUcTMFPm8XnfkMU3s55ZMq3y8BwGvb8h auPWs8Nao93vjtDAGK3BSISVpxxC9gPbTwnddrUq0kFWNDVNQYYyH7LebXtdx1iNJ2Jq XSULpw9i6SfCUAxiO+WMbIyUcAUygh297vYWrhDGp688oRz96AKkLDy6RWHm8LDaVeeC cr1e7BttdymrUl3U5GA/OSufPDnqltO93YJp76BIrPhNjW3LCRyNFB8GYKD5U053Tra8 1QiA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=0UloynJx4FD/pgAzOgUkwGUsAXEVRg/vVo9Gep3eslQ=; b=GaxltaBilPZ5PBrslcj8O5Y6ijvBlopPpxlqqi/Ltznth1x8ZnoTfad8NZZmxqLNJu s9PbHvo+LA+0lzT1dZTsfV65trkUwFAOn0DvstwveNaFH9IRSVJYy8s6j8O7aMus/xzh wRT4NkH8ksDIp8/wIQGc4Muoq7t8eZjm7gao6vXLqIOEHAqmO+wTtRo5F90UAHM1wOoZ ePgqpFBxFYQoYOeaRWFlekHr2vXL91mWUDP0UwTS3zJ/WE7OgKVGuPS5PMUvwzganahp ZJTeh1dvhtRsS5Oqe6qSqDclXmcwT9ajLvZB8PHKUPNLJko++QGOuPFzRis1HxaC5ja5 xRyQ== X-Gm-Message-State: AGRZ1gKzSi20mpeBVYzbqoDzDrHV/XHGG2Fnlb1u+pCkaci/KWTpfG6V iNRgQw5fe40zg0HhqjNN6dONyrsreSk= X-Google-Smtp-Source: AJdET5fHGvFw2W1hFj5pm+GF7fa8pN7yNozvtQ0B8/O/nASArwr1DH1sX7cTtCxejQBCMK/3ntkfvg== X-Received: by 2002:a37:9f87:: with SMTP id i129mr20883056qke.255.1542663885411; Mon, 19 Nov 2018 13:44:45 -0800 (PST) Received: from localhost.localdomain (c-73-69-118-222.hsd1.nh.comcast.net. [73.69.118.222]) by smtp.gmail.com with ESMTPSA id x5sm27493714qtc.43.2018.11.19.13.44.44 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 19 Nov 2018 13:44:44 -0800 (PST) From: Pavel Tatashin To: catalin.marinas@arm.com, will.deacon@arm.com, akpm@linux-foundation.org, rppt@linux.vnet.ibm.com, mhocko@suse.com, ard.biesheuvel@linaro.org, andrew.murray@arm.com, james.morse@arm.com, marc.zyngier@arm.com, sboyd@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, pasha.tatashin@soleen.com Subject: [PATCH v1 0/1] Early boot time stamps for arm64 Date: Mon, 19 Nov 2018 16:44:42 -0500 Message-Id: <20181119214443.25175-1-pasha.tatashin@soleen.com> X-Mailer: git-send-email 2.19.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I made early boot time stamps available for SPARC and X86. x86: https://lore.kernel.org/lkml/20180719205545.16512-1-pasha.tatashin@oracle.com sparc: https://www.spinics.net/lists/sparclinux/msg18063.html As discussed at plumbers, I would like to add the same for arm64. The implementation does not have to be perfect, and should work only when early clock is easy to determine. arm64 defines a clock register, and thus makes it easy, but on some platforms frequency register is broken, so if it is not known, simply don't initialize clock early. dmesg before: https://paste.ubuntu.com/p/3pJ5kgJHyN dmesg after: https://paste.ubuntu.com/p/RHKGVd9nSM As seen from the above with base smp_init is finished after 0.47s: [ 0.464585] SMP: Total of 8 processors activated. But, in reality, 3.2s is missing which is a quiet long considering this is only 60G domain. Pavel Tatashin (1): arm64: early boot clock for aarch64 arch/arm64/kernel/setup.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) -- 2.19.1