From: Pierre Gondois <pierre.gondois@arm.com>
To: Sumit Gupta <sumitg@nvidia.com>,
rafael@kernel.org, viresh.kumar@linaro.org, lenb@kernel.org,
zhenglifeng1@huawei.com, zhanjie9@hisilicon.com,
mario.limonciello@amd.com, saket.dumbre@intel.com,
linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-pm@vger.kernel.org, acpica-devel@lists.linux.dev
Cc: treding@nvidia.com, jonathanh@nvidia.com, vsethi@nvidia.com,
ksitaraman@nvidia.com, sanjayc@nvidia.com, bbasu@nvidia.com,
Mario Limonciello <superm1@kernel.org>
Subject: Re: [PATCH v2 1/2] ACPI: CPPC: Add support for CPPC v4
Date: Thu, 30 Apr 2026 18:25:21 +0200 [thread overview]
Message-ID: <2eff2693-622a-4605-974a-ab138c75130f@arm.com> (raw)
In-Reply-To: <20260430142430.755437-2-sumitg@nvidia.com>
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@nvidia.com>
> Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: Pierre Gondois <pierre.gondois@arm.com>
next prev parent reply other threads:[~2026-04-30 16:26 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-30 14:24 [PATCH v2 0/2] ACPI: CPPC: Add CPPC v4 support (ACPI 6.6) Sumit Gupta
2026-04-30 14:24 ` [PATCH v2 1/2] ACPI: CPPC: Add support for CPPC v4 Sumit Gupta
2026-04-30 16:25 ` Pierre Gondois [this message]
2026-04-30 14:24 ` [PATCH v2 2/2] ACPI: CPPC: Add ospm_nominal_perf support Sumit Gupta
2026-04-30 14:57 ` Mario Limonciello
2026-04-30 16:25 ` Pierre Gondois
2026-05-07 21:03 ` Sumit Gupta
2026-05-13 15:43 ` Pierre Gondois
2026-05-14 19:15 ` Sumit Gupta
2026-05-08 19:01 ` [PATCH v2 0/2] ACPI: CPPC: Add CPPC v4 support (ACPI 6.6) Rafael J. Wysocki
2026-05-11 21:20 ` Sumit Gupta
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