linux-kernel - [PATCH 0/5] cpufreq:boost: CPU Boost mode support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 06 Jun 2013 09:07:47 +0200
From:	Lukasz Majewski <l.majewski@...sung.com>
To:	Viresh Kumar <viresh.kumar@...aro.org>,
	"Rafael J. Wysocky" <rjw@...k.pl>
Cc:	"cpufreq@...r.kernel.org" <cpufreq@...r.kernel.org>,
	Linux PM list <linux-pm@...r.kernel.org>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Lukasz Majewski <l.majewski@...sung.com>,
	Jonghwa Lee <jonghwa3.lee@...sung.com>,
	Myungjoo Ham <myungjoo.ham@...sung.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Lukasz Majewski <l.majewski@...ess.pl>,
	Andre Przywara <andre.przywara@...aro.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>
Subject: [PATCH 0/5] cpufreq:boost: CPU Boost mode support

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 exclude
common code.

Important design decisions:

- Boost related code is compiled-in unconditionally. I wanted to avoid
situation when a lot of #ifdef CONFIG_CPU_FREQ_BOOST are scattered at
cpufreq code (especially cpufreq.c large file)

- Only one cpufreq_boost instance is created at cpufreq driver file. 

- Boost can manage overclocking when many policies are istalled in
the system (this is a preparation for b.L)

- Boost sysfs attributies are seen only when cpufreq driver supports them.
They will not show up until either CONFIG_CPU_FREQ_BOOST or device tree
cpufreq "boost_mode" attribute is defined.

- No special spin_lock for Boost was created. The one from cpufreq was
reused.

- Low level boost trigger function (*low_level_boost function callback) is
necessary to "glue" together acpi-cpufreq boost with software based one.



Tested at: HW: Exynos 4412 3.10 linux
	   Compile tested x86_64 defconfig (acpi) - help with HW test 
		needed

Lukasz Majewski (5):
  cpufreq: Define cpufreq_set_drv_attr_files() to add per CPU sysfs
    attributes
  cpufreq:boost: Add support for software based CPU frequency boost
  cpufreq:acpi:x86: Adjust the acpi-cpufreq.c code to work with common
    boost solution
  cpufreq:exynos:Extend exynos cpufreq driver to support boost
  cpufreq:boost:Kconfig: Enable boost support at Kconfig

 drivers/cpufreq/Kconfig          |    7 ++
 drivers/cpufreq/acpi-cpufreq.c   |   64 ++++++--------
 drivers/cpufreq/cpufreq.c        |  175 ++++++++++++++++++++++++++++++++++++--
 drivers/cpufreq/exynos-cpufreq.c |   48 +++++++++++
 drivers/cpufreq/freq_table.c     |   87 ++++++++++++++++++-
 include/linux/cpufreq.h          |   35 +++++++-
 6 files changed, 369 insertions(+), 47 deletions(-)

-- 
1.7.10.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/