On 1/26/2024 02:08, Perry Yuan wrote:
> From: Perry Yuan <Perry.Yuan@amd.com>
>
> Introduce AMD CPU frequency boosting control sysfs entry which userd for
> switching boost on and boost off.
Typo in this sentence.
>
> If core performance boost is disabled while a core is in a boosted P-state,
> the core automatically transitions to the highest performance non-boosted P-state
> The highest perf and frequency will be limited by the setting value.
>
> Signed-off-by: Perry Yuan <Perry.Yuan@amd.com>
> ---
> Documentation/admin-guide/pm/amd-pstate.rst | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/Documentation/admin-guide/pm/amd-pstate.rst b/Documentation/admin-guide/pm/amd-pstate.rst
> index 1cf40f69278c..d72dc407c4db 100644
> --- a/Documentation/admin-guide/pm/amd-pstate.rst
> +++ b/Documentation/admin-guide/pm/amd-pstate.rst
> @@ -385,6 +385,17 @@ control its functionality at the system level. They are located in the
> to the operation mode represented by that string - or to be
> unregistered in the "disable" case.
>
> +``cpb_boost``
> + Specifies whether core performance boost is requested to be enabled or disabled
> + If core performance boost is disabled while a core is in a boosted P-state, the
> + core automatically transitions to the highest performance non-boosted P-state.
> + AMD Core Performance Boost(CPB) is controlled by this new attribute file which
> + allow user to change all cores frequency boosting state. It supports both
> + ``active mode`` and ``passive mode`` control with below value write to it.
Does it also support guided mode?
> +
> + "0" Disable Core performance Boosting
> + "1" Enable Core performance Boosting
> +
> ``cpupower`` tool support for ``amd-pstate``
> ===============================================
>