linux/Documentation/admin-guide/pm
Rafael J. Wysocki b9c273babc PM / arch: x86: MSR_IA32_ENERGY_PERF_BIAS sysfs interface
The Performance and Energy Bias Hint (EPB) is expected to be set by
user space through the generic MSR interface, but that interface is
not particularly nice and there are security concerns regarding it,
so it is not always available.

For this reason, add a sysfs interface for reading and updating the
EPB, in the form of a new attribute, energy_perf_bias, located
under /sys/devices/system/cpu/cpu#/power/ for online CPUs that
support the EPB feature.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Acked-by: Borislav Petkov <bp@suse.de>
2019-04-07 22:33:42 +02:00
..
cpufreq.rst Documentation: cpufreq: Correct a typo 2018-11-07 13:32:34 +01:00
cpuidle.rst cpuidle: New timer events oriented governor for tickless systems 2019-01-16 23:07:30 +01:00
index.rst PM: docs: Describe high-level PM strategies and sleep states 2017-08-29 00:15:32 +02:00
intel_epb.rst PM / arch: x86: MSR_IA32_ENERGY_PERF_BIAS sysfs interface 2019-04-07 22:33:42 +02:00
intel_pstate.rst Documentation: intel_pstate: Clarify coordination of P-State limits 2018-11-29 22:31:58 +01:00
sleep-states.rst PM: docs: sleep-states: Fix a typo ("includig") 2018-05-09 12:15:13 +02:00
strategies.rst PM: docs: Describe high-level PM strategies and sleep states 2017-08-29 00:15:32 +02:00
system-wide.rst PM: docs: Describe high-level PM strategies and sleep states 2017-08-29 00:15:32 +02:00
working-state.rst PM / arch: x86: Rework the MSR_IA32_ENERGY_PERF_BIAS handling 2019-04-07 22:33:19 +02:00