On 25 July 2013 22:03, Lukasz Majewski <l.majewski@xxxxxxxxxxx> wrote: > 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. > > - All available policies are now stored in a list. > > - 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. Then it starts > monitoring target temperature to evaluate if boost can be enabled > again. This emulates behaviour similar to HW managed boost (like x86) > > New patches for v6: > cpufreq:exynos4x12: Change L0 driver data to CPUFREQ_BOOST_FREQ > > Tested at HW: > Exynos 4412 3.11-rc1 Linux > Intel Core i7-3770 3.11-rc1 Linux I am done with review of this patchset now and should say pretty much comfortable with it now.. -- 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
