Re: [PATCH v2 1/2] ACPI: CPPC: Add support for CPPC v4

[Pierre Gondois]

Hello Sumit,

On 4/30/26 16:24, Sumit Gupta wrote:
> CPPC v4 (ACPI 6.6, Section 8.4.6) adds two optional entries to the
> _CPC package:
>
> 1. OSPM Nominal Performance (8.4.6.1.2.6): A write-only register that
>     lets OSPM inform the platform what it considers nominal performance.
>     The platform classifies performance above this level as boost and
>     below as throttle for its power/thermal decisions.
>
> 2. Resource Priority (8.4.6.1.2.7): A Package of Resource Priority
>     Register Descriptor sub-packages that allow OSPM to set relative
>     priority among processors for shared resources (boost, throttle,
>     L2/L3 cache, memory bandwidth). Parsing the full structure is not
>     yet supported; such entries are marked as unsupported.
>
> Add v4 _CPC table parsing (25 entries) and update REG_OPTIONAL to
> mark the two new registers as optional.
>
> Signed-off-by: Sumit Gupta <sumitg@xxxxxxxxxx>
> Reviewed-by: Mario Limonciello (AMD) <superm1@xxxxxxxxxx>

Reviewed-by: Pierre Gondois <pierre.gondois@xxxxxxx>