linux-kernel - Re: [PATCH v2 4/6] Documentation: amd_pstate: Move amd

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Date:   Thu, 12 Jan 2023 23:38:23 -0600
From:   Mario Limonciello <mario.limonciello@....com>
To:     Wyes Karny <wyes.karny@....com>,
        Rafael J Wysocki <rafael@...nel.org>,
        Huang Rui <ray.huang@....com>,
        Jonathan Corbet <corbet@....net>,
        Viresh Kumar <viresh.kumar@...aro.org>, Perry.Yuan@....com,
        Ananth Narayan <ananth.narayan@....com>, gautham.shenoy@....com
Cc:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, Bagas Sanjaya <bagasdotme@...il.com>,
        santosh.shukla@....com
Subject: Re: [PATCH v2 4/6] Documentation: amd_pstate: Move amd_pstate param
 to alphabetical order

On 1/12/23 23:21, Wyes Karny wrote:
> Move amd_pstate command line param description to correct alphabetical
> order.
> 
> Signed-off-by: Wyes Karny <wyes.karny@....com>

Reviewed-by: Mario Limonciello <mario.limonciello@....com>

> ---
>   .../admin-guide/kernel-parameters.txt         | 46 +++++++++----------
>   1 file changed, 23 insertions(+), 23 deletions(-)
> 
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 0d8486325c9a..5f6a3a34251e 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -339,6 +339,29 @@
>   			             This mode requires kvm-amd.avic=1.
>   			             (Default when IOMMU HW support is present.)
>   
> +	amd_pstate=	[X86]
> +			disable
> +			  Do not enable amd_pstate as the default
> +			  scaling driver for the supported processors
> +			passive
> +			  Use amd_pstate with passive mode as a scaling driver.
> +			  In this mode autonomous selection is disabled.
> +			  Driver requests a desired performance level and platform
> +			  tires to match the same performance level (if it is
> +			  satisfied by guaranteed performance level).
> +			active
> +			  Use amd_pstate_epp driver instance as the scaling driver,
> +			  driver provides a hint to the hardware if software wants
> +			  to bias toward performance (0x0) or energy efficiency (0xff)
> +			  to the CPPC firmware. then CPPC power algorithm will
> +			  calculate the runtime workload and adjust the realtime cores
> +			  frequency.
> +			guided
> +			  Activate guided autonomous mode. Driver requests minimum and
> +			  maximum performance level and the platform autonomously
> +			  selects a performance level in this range and appropriate
> +			  to the current workload.
> +
>   	amijoy.map=	[HW,JOY] Amiga joystick support
>   			Map of devices attached to JOY0DAT and JOY1DAT
>   			Format: <a>,<b>
> @@ -7009,26 +7032,3 @@
>   				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 with passive mode as a scaling driver.
> -			  In this mode autonomous selection is disabled.
> -			  Driver requests a desired performance level and platform
> -			  tires to match the same performance level (if it is
> -			  satisfied by guaranteed performance level).
> -			active
> -			  Use amd_pstate_epp driver instance as the scaling driver,
> -			  driver provides a hint to the hardware if software wants
> -			  to bias toward performance (0x0) or energy efficiency (0xff)
> -			  to the CPPC firmware. then CPPC power algorithm will
> -			  calculate the runtime workload and adjust the realtime cores
> -			  frequency.
> -			guided
> -			  Activate guided autonomous mode. Driver requests minimum and
> -			  maximum performance level and the platform autonomously
> -			  selects a performance level in this range and appropriate
> -			  to the current workload.