From patchwork Tue Jun 23 14:21:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Quentin Perret X-Patchwork-Id: 211762 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=-11.6 required=3.0 tests=DKIMWL_WL_MED, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT, USER_IN_DEF_DKIM_WL 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 E2E31C433DF for ; Tue, 23 Jun 2020 14:21:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BE75020716 for ; Tue, 23 Jun 2020 14:21:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="V94+StGW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732789AbgFWOVl (ORCPT ); Tue, 23 Jun 2020 10:21:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53302 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732723AbgFWOVk (ORCPT ); Tue, 23 Jun 2020 10:21:40 -0400 Received: from mail-qt1-x849.google.com (mail-qt1-x849.google.com [IPv6:2607:f8b0:4864:20::849]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C498EC061573 for ; Tue, 23 Jun 2020 07:21:40 -0700 (PDT) Received: by mail-qt1-x849.google.com with SMTP id l1so15753394qtv.13 for ; Tue, 23 Jun 2020 07:21:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:message-id:mime-version:subject:from:to:cc; bh=u1DDKlY4raUnYKBkmaNYPdbNtcYQKCadD73iqEHJ/Ig=; b=V94+StGWnc22eutcWvOiDbMPO3aIFCF/x/97/cKQYwcL/WynS+RlBLbo/0jwE0o2VA nvcw+BSjvTbunQrZHWvIddiZGzLt+QE7fYwP2NJT85uIfNyhClMJ0GenQppRmjarze6z 2hnxUwvjgKD1htigvr+jaLAzk5YWbRZazVdI5VsbCUZcBW5zbKBLmcIYmXECYtvgsdFh TeOvh+Mk+8ghcMYmeyMi+EaoYPyYRwGQ6dgf4tTU5PfGW12EanP3QAbZCAItTuSvaN1/ Pl5gtcWsGbr8nibe1a6JsDp9rUVV3xzkqErQBK1KEXyWT79IpUnkrtRyqmMJM8VDJumM FZ6A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=u1DDKlY4raUnYKBkmaNYPdbNtcYQKCadD73iqEHJ/Ig=; b=ZlHiURJIGVIUWtqpvhk+sXw+MfznwUyKhAsZdJneg8CUegWB0e1Jg84How67B0/Cez 9YAri5O6znO5AY/yFhXVvGXx95mc7pMFEfb5d5B5QtwS1MIFc/S9a/oiDWb3Ozvp1anI zufbSL3NedRwzlEgYPZN0lMiURv0jWZFt4MbHHXjOaep38CTsa3VLXHJf2DgXAeuUqSz BwzweUvQIdOq+wu00vuIPgbTiJuH7korN0fCp5H4hbeG4DhorPUfGuNVgxQllF6CFRjJ 1kupgcDB5DY45lu0FqgkiP8CY1oe2tl2NMfvtdDlXT7AGziOjaQaUXrLbqmq8Io1wXKk AoSw== X-Gm-Message-State: AOAM5307HSt1XoZdElZqU79P9HLpi/O1EYyW/EpCJd4meatgsQVg802p 6sfl2p6SUoCAaU8vp2K+pxJcEYdpmnBf X-Google-Smtp-Source: ABdhPJw/yysC+TJ6IjitCFw5yaXajcA+uMBI+rTC2wq1jjbjHR0l6X9AqIpGAMm6egmgBJibg/HvOHK7IZay X-Received: by 2002:ad4:56ac:: with SMTP id bd12mr26923271qvb.139.1592922099906; Tue, 23 Jun 2020 07:21:39 -0700 (PDT) Date: Tue, 23 Jun 2020 15:21:36 +0100 Message-Id: <20200623142138.209513-1-qperret@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.27.0.111.gc72c7da667-goog Subject: [PATCH v2 0/2] cpufreq: Specify the default governor on command line From: Quentin Perret To: rjw@rjwysocki.net, rafael@kernel.org, viresh.kumar@linaro.org Cc: arnd@arndb.de, mpe@ellerman.id.au, benh@kernel.crashing.org, paulus@samba.org, mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, kernel-team@android.com, qperret@google.com, tkjos@google.com, adharmap@codeaurora.org Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org This series enables users of prebuilt kernels (e.g. distro kernels) to specify their CPUfreq governor of choice using the kernel command line, instead of having to wait for the system to fully boot to userspace to switch using the sysfs interface. This is helpful for 2 reasons: 1. users get to choose the governor that runs during the actual boot; 2. it simplifies the userspace boot procedure a bit (one less thing to worry about). To enable this, the first patch moves all governor init calls to core_initcall, to make sure they are registered by the time the drivers probe. This should be relatively low impact as registering a governor is a simple procedure (it gets added to a llist), and all governors already load at core_initcall anyway when they're set as the default in Kconfig. This also allows to clean-up the governors' init/exit code, and reduces boilerplate. The second patch introduces the new command line parameter, inspired by its cpuidle counterpart. More details can be found in the respective patch headers. Changes in v2: - added Viresh's ack to patch 01 - moved the assignment of 'default_governor' in patch 02 to the governor registration path instead of the driver registration (Viresh) Thanks, Quentin Quentin Perret (2): cpufreq: Register governors at core_initcall cpufreq: Specify default governor on command line .../admin-guide/kernel-parameters.txt | 5 ++++ Documentation/admin-guide/pm/cpufreq.rst | 6 ++--- .../platforms/cell/cpufreq_spudemand.c | 26 ++----------------- drivers/cpufreq/cpufreq.c | 23 ++++++++++++---- drivers/cpufreq/cpufreq_conservative.c | 22 ++++------------ drivers/cpufreq/cpufreq_ondemand.c | 24 +++++------------ drivers/cpufreq/cpufreq_performance.c | 14 ++-------- drivers/cpufreq/cpufreq_powersave.c | 18 +++---------- drivers/cpufreq/cpufreq_userspace.c | 18 +++---------- include/linux/cpufreq.h | 14 ++++++++++ kernel/sched/cpufreq_schedutil.c | 6 +---- 11 files changed, 62 insertions(+), 114 deletions(-)