linux-kernel - Re: [PATCH V5 5/7] cpufreq: amd-pstate: Update amd-pstate preferred core ranking dynamically

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Message-ID: <20230908132837.GJ19320@noisy.programming.kicks-ass.net>
Date:   Fri, 8 Sep 2023 15:28:37 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Meng Li <li.meng@....com>
Cc:     "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Huang Rui <ray.huang@....com>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, x86@...nel.org,
        linux-acpi@...r.kernel.org, Shuah Khan <skhan@...uxfoundation.org>,
        linux-kselftest@...r.kernel.org,
        Nathan Fontenot <nathan.fontenot@....com>,
        Deepak Sharma <deepak.sharma@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Mario Limonciello <mario.limonciello@....com>,
        Shimmer Huang <shimmer.huang@....com>,
        Perry Yuan <Perry.Yuan@....com>,
        Xiaojian Du <Xiaojian.Du@....com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Borislav Petkov <bp@...en8.de>, Wyes Karny <wyes.karny@....com>
Subject: Re: [PATCH V5 5/7] cpufreq: amd-pstate: Update amd-pstate preferred
 core ranking dynamically

On Tue, Sep 05, 2023 at 09:51:14AM +0800, Meng Li wrote:

> diff --git a/include/linux/amd-pstate.h b/include/linux/amd-pstate.h
> index 446394f84606..2159fd5693fe 100644
> --- a/include/linux/amd-pstate.h
> +++ b/include/linux/amd-pstate.h
> @@ -31,6 +31,11 @@ struct amd_aperf_mperf {
>  	u64 mperf;
>  	u64 tsc;
>  };
> +	/* For platforms that do not support the preferred core feature, the
> +	 * highest_pef may be configured with 166 or 255, to avoid max frequency
> +	 * calculated wrongly. we take the AMD_CPPC_HIGHEST_PERF(cap1) value as
> +	 * the default max perf.
> +	 */

Invalid comment style, also seems randomly (mis)placed.