Cpuidle Driver for Intel Processors

modulename: intel_idle.ko

configname: CONFIG_INTEL_IDLE

Linux Kernel Configuration
└─>Power management and ACPI options
└─>Cpuidle Driver for Intel Processors
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Enable intel_idle, a cpuidle driver that includes knowledge of
native Intel hardware idle features. The acpi_idle driver
can be configured at the same time, in order to handle
processors intel_idle does not support.

source code: