Linux ACPI
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From: Mario Limonciello <mario.limonciello@amd.com>
To: "Rafael J . Wysocki" <rafael@kernel.org>
Cc: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-pm@vger.kernel.org,
	K Prateek Nayak <kprateek.nayak@amd.com>,
	x86@kernel.org
Subject: Re: [PATCH v3 0/4] Add CPPC HighestFreq support
Date: Wed, 27 May 2026 16:19:15 +0100	[thread overview]
Message-ID: <158d23ba-33b7-40c8-8d71-bc30f27e81f2@amd.com> (raw)
In-Reply-To: <20260514215626.35327-1-mario.limonciello@amd.com>



On 5/14/26 22:56, Mario Limonciello wrote:
> On some systems, the boost ratio cannot be accurately calculated
> using linear interpolation of CPPC performance values because the
> performance-to-frequency mapping is not linear across all cores.
> 
> This series introduces support for the CPPC HighestFreq register.  This
> register is under a proposal with ASWG at the moment and trending for
> inclusion in ACPI 6.7.
> 
> This optionally provides the actual highest frequency eliminating
> the need for interpolation. When available, this frequency value is used
> for more accurate CPU capacity calculations and boost ratio determination.
> 
> This series adds support for the ACPI 6.7 proposal. It require's Sumit's
> CPPC v4 patches.
> 

Hi Folks,

Sorry; due to some miscomunication this series jumped the gun a little 
bit as ACPI 6.7 hasn't been released and it should wait until that 
version of the spec is released.

I'll withdraw this series right now and re-post it after ACPI 6.7 is 
released.

Thanks!

      parent reply	other threads:[~2026-05-27 15:19 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-14 21:56 [PATCH v3 0/4] Add CPPC HighestFreq support Mario Limonciello
2026-05-14 21:56 ` [PATCH v3 1/4] ACPI: CPPC: Add support for reading HighestFreq Mario Limonciello
2026-05-14 21:56 ` [PATCH v3 2/4] ACPI: CPPC: Refactor boost ratio handling Mario Limonciello
2026-05-14 21:56 ` [PATCH v3 3/4] cpufreq/acpi-cpufreq: Use amd_get_boost_ratio() Mario Limonciello
2026-05-14 21:56 ` [PATCH v3 4/4] cpufreq/amd-pstate: Get highest freq from CPPC if available Mario Limonciello
2026-05-27 15:19 ` Mario Limonciello [this message]

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