linux-kernel - Re: [PATCH] cpufreq: intel_pstate: Add Sapphire Rapids support in no-HWP mode

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Message-ID: <CAJZ5v0iFe-jeVw_VfqG+xgxN_VVWXHEx9r4S_dGERWsWDNPxPA@mail.gmail.com>
Date:   Wed, 30 Nov 2022 19:57:56 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Giovanni Gherdovich <ggherdovich@...e.cz>
Cc:     "Rafael J . Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Len Brown <lenb@...nel.org>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cpufreq: intel_pstate: Add Sapphire Rapids support in
 no-HWP mode

On Mon, Nov 21, 2022 at 4:35 PM Giovanni Gherdovich <ggherdovich@...e.cz> wrote:
>
> Users may disable HWP in firmware, in which case intel_pstate wouldn't load
> unless the CPU model is explicitly supported.
>
> See also the following past commits:
>
> commit d8de7a44e11f ("cpufreq: intel_pstate: Add Skylake servers support")
> commit 706c5328851d ("cpufreq: intel_pstate: Add Cometlake support in
> no-HWP mode")
> commit fbdc21e9b038 ("cpufreq: intel_pstate: Add Icelake servers support in
> no-HWP mode")
> commit 71bb5c82aaae ("cpufreq: intel_pstate: Add Tigerlake support in
> no-HWP mode")
>
> Signed-off-by: Giovanni Gherdovich <ggherdovich@...e.cz>
> ---
>  drivers/cpufreq/intel_pstate.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
> index 6ff73c30769f..181cd6b045ff 100644
> --- a/drivers/cpufreq/intel_pstate.c
> +++ b/drivers/cpufreq/intel_pstate.c
> @@ -2378,6 +2378,7 @@ static const struct x86_cpu_id intel_pstate_cpu_ids[] = {
>         X86_MATCH(COMETLAKE,            core_funcs),
>         X86_MATCH(ICELAKE_X,            core_funcs),
>         X86_MATCH(TIGERLAKE,            core_funcs),
> +       X86_MATCH(SAPPHIRERAPIDS_X,     core_funcs),
>         {}
>  };
>  MODULE_DEVICE_TABLE(x86cpu, intel_pstate_cpu_ids);
> --

Applied as 6.2 material, thanks!