Re: [PATCH] cpufreq: intel_pstate: Add Ice Lake server to out-of-band IDs

[Rafael J. Wysocki]

On Fri, Nov 12, 2021 at 10:17 AM Adamos Ttofari <attofari@xxxxxxxxx> wrote:
>
> Commit fbdc21e9b038 ("cpufreq: intel_pstate: Add Icelake servers support in
> no-HWP mode") enabled the use of Intel P-State driver for Ice Lake servers.
> But it doesn't cover the case when OS can't control P-States.
>
> Therefore, for Ice Lake server, if MSR_MISC_PWR_MGMT bits 8 or 18 are
> enabled, then the Intel P-State driver should exit as OS can't control
> P-States.
>
> Fixes: fbdc21e9b038 ("cpufreq: intel_pstate: Add Icelake servers support in no-HWP mode")
>
> Signed-off-by: Adamos Ttofari <attofari@xxxxxxxxx>
> Cc: Hendrik Borghorst <hborghor@xxxxxxxxx>
> Cc: David Woodhouse <dwmw@xxxxxxxxxxxx>
> ---
>  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 815df3daae9d..1088ff350159 100644
> --- a/drivers/cpufreq/intel_pstate.c
> +++ b/drivers/cpufreq/intel_pstate.c
> @@ -2353,6 +2353,7 @@ static const struct x86_cpu_id intel_pstate_cpu_oob_ids[] __initconst = {
>         X86_MATCH(BROADWELL_D,          core_funcs),
>         X86_MATCH(BROADWELL_X,          core_funcs),
>         X86_MATCH(SKYLAKE_X,            core_funcs),
> +       X86_MATCH(ICELAKE_X,            core_funcs),
>         {}
>  };
>
> --

Applied as 5.16-rc material, thanks!