korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-11 12:28:41 +08:00
Code Issues Packages Projects Releases Wiki Activity

Documentation: add amd-pstate kernel command line options

Browse Source 
Add a new amd pstate driver command line option to enable driver passive
working mode via MSR and shared memory interface to request desired
performance within abstract scale and the power management firmware
(SMU) convert the perf requests into actual hardware pstates.

Also the `disable` parameter can disable the pstate driver loading by
adding `amd_pstate=disable` to kernel command line.

Acked-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Tested-by: Wyes Karny <wyes.karny@amd.com>
Signed-off-by: Perry Yuan <Perry.Yuan@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Perry Yuan 2022-11-17 15:35:41 +08:00 committed by Rafael J. Wysocki
parent 8a2cbf72a4
commit 1056d31470
1 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
Documentation/admin-guide/kernel-parameters.txt
View File

@ -6959,3 +6959,14 @@
memory, and other data can't be written using
xmon commands.
off xmon is disabled.
amd_pstate= [X86]
disable
Do not enable amd_pstate as the default
scaling driver for the supported processors
passive
Use amd_pstate as a scaling driver, driver requests a
desired performance on this abstract scale and the power
management firmware translates the requests into actual
hardware states (core frequency, data fabric and memory
clocks etc.)