disable
                         Do not enable intel_pstate as the default
                         scaling driver for the supported processors
++ +                   force
++ +                     Enable intel_pstate on systems that prohibit it by default
++ +                     in favor of acpi-cpufreq. Forcing the intel_pstate driver
++ +                     instead of acpi-cpufreq may disable platform features, such
++ +                     as thermal controls and power capping, that rely on ACPI
++ +                     P-States information being indicated to OSPM and therefore
++ +                     should be used with caution. This option does not work with
++ +                     processors that aren't supported by the intel_pstate driver
++ +                     or on platforms that use pcc-cpufreq instead of acpi-cpufreq.
 + +                   no_hwp
 + +                     Do not enable hardware P state control (HWP)
 + +                     if available.
    
        intremap=       [X86-64, Intel-IOMMU]
                        on      enable Interrupt Remapping (default)