On Thursday, January 16, 2014 10:40:08 AM Lukasz Majewski wrote: > Hi Rafael, > > > On Wed, 2014-01-08 at 01:35 +0100, Rafael J. Wysocki wrote: > > > On Tuesday, January 07, 2014 07:58:24 AM Lukasz Majewski wrote: > > > > Hi Rafael, > > > > > > Hi, > > > > > > > > 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-rc4 Linux > > > > > Intel Core i7-3770 3.13-rc4 Linux > > > > > > > > > > Above patches were posted on top of kernel_pm/bleeding-edge > > > > > (SHA1: bd0f3a5d9dce48a917ce1f1047534d79c725149) > > > > > > > > > > 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(-) > > > > > > > > > > > > > A gentle ping about BOOST patches. > > > > > > > > Its been already acked by Viresh and Eduardo. > > > > > > > > It applies on kernel_pm/bleeding_edge SHA1: > > > > 4836deb72c5e2a9af0cb2129c1149783a26d99ab > > > > > > It looks like Rui is still looking into this. > > > > > > Rui, are you fine with this series? > > > > > Yes, I'm okay with the thermal related parts of this patch set. > > > > Rafael, gentle reminder about BOOST patches ... :-) I'm about to take them for 3.14. Thanks! [PS: Please don't use the rjw@xxxxxxx address, that domain is gone.] -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
