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