Commit f02c20d9 authored by Natesh Sharma's avatar Natesh Sharma Committed by Jonathan Corbet
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docs: admin-guide: Add information about intel_pstate active mode 



Information about intel_pstate active mode is added in the doc.
This operation mode could be used to set on the hardware when it's
not activated. Status of the mode could be checked from sysfs file
i.e., /sys/devices/system/cpu/intel_pstate/status.
The information is already available in cpu-freq/intel-pstate.txt
documentation.

Signed-off-by: default avatarNatesh Sharma <nsharma@redhat.com>
Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
[jc: reformatted for width ]
Link: https://lore.kernel.org/r/20230427083706.49882-1-nsharma@redhat.com
parent bd415b5c

Documentation/admin-guide/kernel-parameters.txt

+10 −0
Original line number Diff line number Diff line
@@ -2117,6 +2117,16 @@ 
			disable

			  Do not enable intel_pstate as the default

			  scaling driver for the supported processors

                        active

                          Use intel_pstate driver to bypass the scaling

                          governors layer of cpufreq and provides it own

                          algorithms for p-state selection. There are two

                          P-state selection algorithms provided by

                          intel_pstate in the active mode: powersave and

                          performance.  The way they both operate depends

                          on whether or not the hardware managed P-states

                          (HWP) feature has been enabled in the processor

                          and possibly on the processor model.

			passive

			  Use intel_pstate as a scaling driver, but configure it

			  to work with generic cpufreq governors (instead of