From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752849Ab3LMQix (ORCPT ); Fri, 13 Dec 2013 11:38:53 -0500 Received: from mailout1.samsung.com ([203.254.224.24]:34290 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752463Ab3LMQiv (ORCPT ); Fri, 13 Dec 2013 11:38:51 -0500 X-AuditID: cbfee61b-b7fbf6d0000051a3-2e-52ab3819d148 From: Lukasz Majewski To: Viresh Kumar , "Rafael J. Wysocki" , Zhang Rui , Eduardo Valentin Cc: "cpufreq@vger.kernel.org" , Linux PM list , Jonghwa Lee , Lukasz Majewski , Lukasz Majewski , linux-kernel , Bartlomiej Zolnierkiewicz , Myungjoo Ham , durgadoss.r@intel.com, linux-samsung-soc@vger.kernel.org Subject: [PATCH v11 0/7] cpufreq:boost: CPU Boost mode support Date: Fri, 13 Dec 2013 17:38:30 +0100 Message-id: <1386952717-30947-1-git-send-email-l.majewski@samsung.com> X-Mailer: git-send-email 1.7.10.4 In-reply-to: <1370502472-7249-1-git-send-email-l.majewski@samsung.com> References: <1370502472-7249-1-git-send-email-l.majewski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrALMWRmVeSWpSXmKPExsVy+t9jQV0pi9VBBtdeMFtsnLGe1eJp0w92 i76fV5gt1uz/yWTRefYJs8WbR9wWbx5uZrS4vGsOm8Xn3iOMFjPO72OyuN24gs3izOlLrBZP HvaxWWz86uHA57F4z0smjzvX9rB5rJv2ltljy9V2Fo++LasYPY7f2M7k8XmTXAB7FJdNSmpO Zllqkb5dAlfGurUP2Ar+SFSs/1TfwLhPuIuRk0NCwETizKHbTBC2mMSFe+vZuhi5OIQEpjNK tD/YyQThdDFJnH69jg2kik1AT+Lz3adgCRGBJYwSr5sWsII4zAIbmSV2znwLViUsYCex/Mk+ MJtFQFVi+s1rzCA2r4CbxPHDj6H2KUp0P5sAVsMJFJ/76QWYLSTgKnHzw0qWCYy8CxgZVjGK phYkFxQnpeca6RUn5haX5qXrJefnbmIEh+sz6R2MqxosDjEKcDAq8fB69q4KEmJNLCuuzD3E KMHBrCTCG6K6OkiINyWxsiq1KD++qDQntfgQozQHi5I478FW60AhgfTEktTs1NSC1CKYLBMH p1QDo33Ge65jTjrVOk6h0xcplx9/PFnJL09YbO2UJyruy/bLzm1dY8VcEhN/e+XdKXPz5u3l 2FH7eEn58R3yGsmf10lzuLW/38y6uv2gsOS/RQI7DqY8uSRh9+rM99Ttk3ZbJr+f0LBxw56i leX+1+8Wb8rcW8wusWvO8zs/MpZ86HX9+a/C/UX6rU4lluKMREMt5qLiRAAAzTiEUwIAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch series introduces support for CPU overclocking technique called Boost. It is a follow up of a LAB governor proposal. Boost is a LAB component: http://thread.gmane.org/gmane.linux.kernel/1484746/match=cpufreq Boost unifies hardware based solution (e.g. Intel Nehalem) with software oriented one (like the one done at Exynos). For this reason cpufreq/freq_table code has been reorganized to include common code. Important design decisions: - Boost related code is compiled-in unconditionally to cpufreq core and disabled by default. The cpufreq_driver is responsibile for setting boost_supported flag and providing set_boost callback(if HW support is needed). For software managed boost, special Kconfig flag - CONFIG_CPU_FREQ_BOOST_SW has been defined. It will be selected only when a target platform has thermal framework properly configured. - struct cpufreq_driver has been extended with boost related fields: -- boost_supported - when driver supports boosting -- boost_enabled - boost state -- set_boost - callback to function, which is necessary to enable/disable boost - Boost sysfs attribute (/sys/devices/system/cpu/cpufreq/boost) is visible _only_ when cpufreq driver supports Boost. - No special spin_lock for Boost was created. The one from cpufreq core was reused. - The Boost code doesn't rely on any policy. When boost state is changed, then the policy list is iterated and proper adjustements are done. - To improve safety level, the thermal framework is also extended to disable software boosting, when thermal trip point is reached. After cooling down the boost can be enabled again. This emulates behaviour similar to HW managed boost (like x86) Tested at HW: Exynos 4412 3.13-rc3 Linux Intel Core i7-3770 3.13-rc3 Linux Above patches were posted on top of kernel_pm/bleeding-edge (SHA1: 2e4bc4515a6143c8c2af037236199eb95f834b40) Lukasz Majewski (7): cpufreq: Add boost frequency support in core cpufreq:acpi:x86: Adjust the acpi-cpufreq.c code to work with common boost solution cpufreq:boost:Kconfig: Provide support for software managed BOOST cpufreq:exynos:Extend Exynos cpufreq driver to support boost framework Documentation:cpufreq:boost: Update BOOST documentation cpufreq:exynos4x12: Change L0 driver data to CPUFREQ_BOOST_FREQ thermal:exynos:boost: Automatic enable/disable of BOOST feature (at Exynos4412) Documentation/cpu-freq/boost.txt | 26 +++---- drivers/cpufreq/Kconfig | 4 + drivers/cpufreq/Kconfig.arm | 15 ++++ drivers/cpufreq/acpi-cpufreq.c | 86 +++++++-------------- drivers/cpufreq/cpufreq.c | 118 ++++++++++++++++++++++++++++- drivers/cpufreq/exynos-cpufreq.c | 3 + drivers/cpufreq/exynos4x12-cpufreq.c | 2 +- drivers/cpufreq/freq_table.c | 56 ++++++++++++-- drivers/thermal/samsung/exynos_tmu_data.c | 12 +-- include/linux/cpufreq.h | 24 ++++++ 10 files changed, 261 insertions(+), 85 deletions(-) -- 1.7.10.4