There is a new hardware feature, which lets system software to set Energy Performance Preference. This is a opaque knob in the form of IA32_ENERGY_PERF_BIAS MSR, which has a 4 bit Energy Performance Preference Hint. The support for this feature is indicated by CPUID.06H.ECX.bit3. Refer to Intel Architectures Software Developer's Manual for more info. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@xxxxxxxxx> --- Modification from first version - Revised kernel parameter documentation. -- -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html