Messages in this thread | | | Date | Thu, 17 Nov 2022 10:38:31 +0530 | Subject | Re: [PATCH 5/5] Documentation: add amd-pstate kernel command line options | From | Wyes Karny <> |
| |
On 11/17/2022 8:19 AM, Perry Yuan wrote: > 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. > > Signed-off-by: Perry Yuan <Perry.Yuan@amd.com>
Tested-by: Wyes Karny <wyes.karny@amd.com>
> --- > Documentation/admin-guide/kernel-parameters.txt | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt > index a465d5242774..42af9ca0127e 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt > @@ -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.)
-- Thanks & Regards, Wyes
| |