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Wysocki" CC: , , , References: <20260504230141.484743-1-mario.limonciello@amd.com> Content-Language: en-US From: K Prateek Nayak In-Reply-To: <20260504230141.484743-1-mario.limonciello@amd.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Received-SPF: None (SATLEXMB03.amd.com: kprateek.nayak@amd.com does not designate permitted sender hosts) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF00002325:EE_|DM6PR12MB4339:EE_ X-MS-Office365-Filtering-Correlation-Id: 20587c8a-0519-43e8-de9a-08deac1bb75b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|376014|1800799024|82310400026|22082099003|56012099003|18002099003|13003099007; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb08.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(36860700016)(376014)(1800799024)(82310400026)(22082099003)(56012099003)(18002099003)(13003099007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: h6ArbLEdwXch8qVPz0sghwJemOZcZlI6H2DofRgTvAZ3GA3yoFbzGqwN6pROUstRii0Ab5UUByLOrzew2En1cEh7Qg8pVs5iLHCenrzkiK//QLHwye+Q5D7mIDCnGE8ldaVLXDVKyaaOsYhX7lostQL0Ej7e/d4NXrEasrKxsWpNt47pe0wpUAuCWjWLR0p4Ddd8bi2+4pzB8hJP0qSyoi6hR8q00uWte4qdSlgt1AChmNS+XmqS8Mw9eJiHmraPq/mQ9IRiddhUiU8dkmf7t9iCZw0S+mvUO+RnbL3AQPlQmu57bKZRSGFbp9NNWRdednmtJfxIWnhKC3vWD41fCNpWFiy26GGSGz0YAH2KSUTRO8EEpb8Uu3N3+v6bgNuOebLiKI/kI14aosst/M5I+kRPPk5a/kSdMc85WYeU/wpPc96ThnoOrkuBdz4ctN94 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 May 2026 09:33:37.2190 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 20587c8a-0519-43e8-de9a-08deac1bb75b X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb08.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00002325.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4339 Hello Mario, On 5/5/2026 4:31 AM, 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 brings the existing CPPC definitions up to ACPI 6.6 and then > adds support for the ACPI 6.7 proposal. > > --- > v2: > * Drop CPPC v4 patches, these are submitted separately by Sumit Gupta [1] > > Link: https://lore.kernel.org/linux-pm/20260430142430.755437-1-sumitg@nvidia.com/ [1] I tested the series on top of v7.1-rc2 + Sumit's patch with both amd-pstate and acpi-cpufreq on my 3rd Generation EPYC and everything seems to be in order. Feel free to include: Reviewed-by: K Prateek Nayak Tested-by: K Prateek Nayak -- Thanks and Regards, Prateek