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 and disabled by default The cpufreq_driver is responsibile for setting boost_supported flag and providing enable_boost callback(if HW support is needed) - struct cpufreq_driver has been extended with boost related fields: -- boost_supported - when driver supports boosting -- enable_boost - callback to function, which is necessary to enable boost in the processor (like it is done at Intel) - Boost sysfs attribute (/sys/devices/system/cpu/cpufreq/boost) is always provided. It will be read only, until either cpufreq_driver defines boost_supported flag or device tree's cpufreq "boost_mode" attribute is defined. It is consistent with legacy acpi API. - 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. - Number of busy cpus (with load > 90%) is calculated and exported as a global sysfs attribute. - The SW based boost can be only enabled when up to one core is regarded as a "busy" one. For safety reasons boost is disabled when more cores comes into play. - To improve safety level, the thermal framework is also extended to disable software boosting, when thermal trip point is reached. New patches for v4: cpufreq: Store cpufreq policies in a list cpufreq: Calculate number of busy CPUs cpufreq: Enable software boost only when up to one busy core is running thermal:boost: Disable boost when trip point is reached Tested at: HW: Exynos 4412 3.10 linux Exynos 4210 3.10 linux Compile tested x86_64 defconfig (acpi) - help with HW (Intel Nehalem) test needed Lukasz Majewski (7): cpufreq: Store cpufreq policies in a list cpufreq: Add boost frequency support in core cpufreq:acpi:x86: Adjust the acpi-cpufreq.c code to work with common boost solution cpufreq:exynos:Extend Exynos cpufreq driver to support boost framework cpufreq: Calculate number of busy CPUs cpufreq: Enable software boost only when up to one busy core is running thermal:boost: Disable boost when trip point is reached drivers/cpufreq/acpi-cpufreq.c | 61 ++++++----------- drivers/cpufreq/cpufreq.c | 132 ++++++++++++++++++++++++++++++++++++ drivers/cpufreq/cpufreq_governor.c | 4 ++ drivers/cpufreq/exynos-cpufreq.c | 4 ++ drivers/cpufreq/freq_table.c | 43 ++++++++++-- drivers/thermal/cpu_cooling.c | 3 + include/linux/cpufreq.h | 15 ++++ 7 files changed, 215 insertions(+), 47 deletions(-) -- 1.7.10.4 -- 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
