英特尔速度选择驱动程序在哪里？

Question

根据

https://builders.intel.com/docs/networkbuilders/intel-speed-select-technology-base-Frequency-enhancing-performance.pdf

第11页，linux从4.20开始支持SST-BF

但我在github上找不到相关代码：

https://github.com/torvalds/linux

Answer 1

根据 https://github.com/intel/CommsPowerManagement/blob/master/sst_bf.py#L121

获取SST-BF基频

base_filename = "/sys/devices/system/cpu/cpu" + str(core) + "/cpufreq/base_frequency"

linux 4.20 intel pstate源代码：

https://elixir.bootlin.com/linux/v4.20/source/drivers/cpufreq/intel_pstate.c#L739

cpufreq_freq_attr_ro(base_frequency);

这行代码是4.20之后才添加的