linux-kernel - RE: [PATCH v9 2/8] cpufreq: amd-pstate: Document the units for freq variables in amd

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Date: Fri, 22 Mar 2024 06:28:55 +0000
From: "Meng, Li (Jassmine)" <Li.Meng@....com>
To: "Yuan, Perry" <Perry.Yuan@....com>, "rafael.j.wysocki@...el.com"
	<rafael.j.wysocki@...el.com>, "Limonciello, Mario"
	<Mario.Limonciello@....com>, "viresh.kumar@...aro.org"
	<viresh.kumar@...aro.org>, "Shenoy, Gautham Ranjal" <gautham.shenoy@....com>,
	"Petkov, Borislav" <Borislav.Petkov@....com>, "Huang, Ray"
	<Ray.Huang@....com>
CC: "Deucher, Alexander" <Alexander.Deucher@....com>, "Huang, Shimmer"
	<Shimmer.Huang@....com>, "oleksandr@...alenko.name"
	<oleksandr@...alenko.name>, "Du, Xiaojian" <Xiaojian.Du@....com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v9 2/8] cpufreq: amd-pstate: Document the units for freq
 variables in amd_cpudata

[AMD Official Use Only - General]

> -----Original Message-----
> From: Yuan, Perry <Perry.Yuan@....com>
> Sent: Tuesday, March 19, 2024 4:29 PM
> To: rafael.j.wysocki@...el.com; Limonciello, Mario
> <Mario.Limonciello@....com>; viresh.kumar@...aro.org; Shenoy, Gautham
> Ranjal <gautham.shenoy@....com>; Petkov, Borislav
> <Borislav.Petkov@....com>; Huang, Ray <Ray.Huang@....com>
> Cc: Deucher, Alexander <Alexander.Deucher@....com>; Huang, Shimmer
> <Shimmer.Huang@....com>; oleksandr@...alenko.name; Du, Xiaojian
> <Xiaojian.Du@....com>; Meng, Li (Jassmine) <Li.Meng@....com>; linux-
> pm@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: [PATCH v9 2/8] cpufreq: amd-pstate: Document the units for freq
> variables in amd_cpudata
>
> From: "Gautham R. Shenoy" <gautham.shenoy@....com>
>
> The min_limit_freq, max_limit_freq, min_freq, max_freq, nominal_freq and
> the lowest_nominal_freq members of struct cpudata store the frequency
> value in khz to be consistent with the cpufreq core. Update the comment to
> document this.
>
> Signed-off-by: Gautham R. Shenoy <gautham.shenoy@....com>
> Signed-off-by: Perry Yuan <perry.yuan@....com>
> ---
>  include/linux/amd-pstate.h | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/include/linux/amd-pstate.h b/include/linux/amd-pstate.h index
> 212f377d615b..ab7e82533718 100644
> --- a/include/linux/amd-pstate.h
> +++ b/include/linux/amd-pstate.h
> @@ -51,15 +51,15 @@ struct amd_aperf_mperf {
>   *             priority.
>   * @min_limit_perf: Cached value of the perf corresponding to policy->min
>   * @max_limit_perf: Cached value of the perf corresponding to policy->max
> - * @min_limit_freq: Cached value of policy->min
> - * @max_limit_freq: Cached value of policy->max
> - * @max_freq: the frequency that mapped to highest_perf
> - * @min_freq: the frequency that mapped to lowest_perf
> - * @nominal_freq: the frequency that mapped to nominal_perf
> - * @lowest_nonlinear_freq: the frequency that mapped to
> lowest_nonlinear_perf
> + * @min_limit_freq: Cached value of policy->min (in khz)
> + * @max_limit_freq: Cached value of policy->max (in khz)
> + * @max_freq: the frequency (in khz) that mapped to highest_perf
> + * @min_freq: the frequency (in khz) that mapped to lowest_perf
> + * @nominal_freq: the frequency (in khz) that mapped to nominal_perf
> + * @lowest_nonlinear_freq: the frequency (in khz) that mapped to
> + lowest_nonlinear_perf
>   * @cur: Difference of Aperf/Mperf/tsc count between last and current
> sample
>   * @prev: Last Aperf/Mperf/tsc count value read from register
> - * @freq: current cpu frequency value
> + * @freq: current cpu frequency value (in khz)
>   * @boost_supported: check whether the Processor or SBIOS supports
> boost mode
>   * @hw_prefcore: check whether HW supports preferred core featue.
>   *             Only when hw_prefcore and early prefcore param are true,
> --
> 2.34.1
[Meng, Li (Jassmine)]
Reviewed-by: Li Meng < li.meng@....com>