[PATCH] cpufreq: intel_pstate: Support Emerald Rapids OOB mode

[PATCH] cpufreq: intel_pstate: Support Emerald Rapids OOB mode

[Srinivas Pandruvada]

Prevent intel_pstate to load when OOB (Out Of Band) P-states mode is
enabled in Emerald Rapids. The OOB identifying bits are same as the
prior generation CPUs like Sapphire Rapids servers. So, also add Emerald
Rapids to intel_pstate_cpu_oob_ids list.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
 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 4b986c044741..6b6d47d3ec02 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -2404,6 +2404,7 @@ static const struct x86_cpu_id intel_pstate_cpu_oob_ids[] __initconst = {
 	X86_MATCH(SKYLAKE_X,		core_funcs),
 	X86_MATCH(ICELAKE_X,		core_funcs),
 	X86_MATCH(SAPPHIRERAPIDS_X,	core_funcs),
+	X86_MATCH(EMERALDRAPIDS_X,	core_funcs),
 	{}
 };
 #endif
-- 
2.40.1

Re: [PATCH] cpufreq: intel_pstate: Support Emerald Rapids OOB mode

[Rafael J. Wysocki]

On Thu, May 30, 2024 at 7:53 AM Srinivas Pandruvada
<srinivas.pandruvada@linux.intel.com> wrote:
>
> Prevent intel_pstate to load when OOB (Out Of Band) P-states mode is
> enabled in Emerald Rapids. The OOB identifying bits are same as the
> prior generation CPUs like Sapphire Rapids servers. So, also add Emerald
> Rapids to intel_pstate_cpu_oob_ids list.
>
> Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
> ---
>  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 4b986c044741..6b6d47d3ec02 100644
> --- a/drivers/cpufreq/intel_pstate.c
> +++ b/drivers/cpufreq/intel_pstate.c
> @@ -2404,6 +2404,7 @@ static const struct x86_cpu_id intel_pstate_cpu_oob_ids[] __initconst = {
>         X86_MATCH(SKYLAKE_X,            core_funcs),
>         X86_MATCH(ICELAKE_X,            core_funcs),
>         X86_MATCH(SAPPHIRERAPIDS_X,     core_funcs),
> +       X86_MATCH(EMERALDRAPIDS_X,      core_funcs),
>         {}
>  };
>  #endif
> --

Rebased on top of the Tony's series:

https://lore.kernel.org/linux-acpi/20240528184720.56259-1-tony.luck@intel.com/

and applied as 6.11 material.

Thanks!