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client-ip=165.204.84.17; helo=satlexmb08.amd.com; pr=C Received: from satlexmb08.amd.com (165.204.84.17) by SN1PEPF000397B5.mail.protection.outlook.com (10.167.248.59) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.406.5 via Frontend Transport; Wed, 9 Sep 2026 03:36:48 +0000 Received: from Satlexmb09.amd.com (10.181.42.218) by satlexmb08.amd.com (10.181.42.217) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.46; Tue, 8 Sep 2026 22:36:45 -0500 Received: from aus0006770c4n-lx01.amd.com (10.180.168.240) by satlexmb09.amd.com (10.181.42.218) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.46; Tue, 8 Sep 2026 22:36:44 -0500 From: Mario Limonciello To: K Prateek Nayak CC: Perry Yuan , "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , "open list:CPU FREQUENCY SCALING FRAMEWORK" , "Mario Limonciello (AMD)" , Christian Ludloff Subject: [PATCH v3 3/3] cpufreq/amd-pstate: Show a warning if missing EPP tunings Date: Tue, 8 Sep 2026 22:36:23 -0500 Message-ID: <20260909033623.454449-4-mario.limonciello@amd.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260909033623.454449-1-mario.limonciello@amd.com> References: <20260909033623.454449-1-mario.limonciello@amd.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: satlexmb08.amd.com (10.181.42.217) To satlexmb09.amd.com (10.181.42.218) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF000397B5:EE_|SJ2PR12MB8690:EE_ X-MS-Office365-Filtering-Correlation-Id: 0c2b0759-dc4d-456d-03e5-08df0e239458 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|36860700016|1800799024|23010399003|376014|10067099003|56012099006|11063799006|22082099003|18002099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: QpgnWZw7p2gMzR+5hLwotbzBEaoYSl0PBitFVnQfoweoYUg3Cdu9bJXQNWj9F0yLvbqaBj8sFDsNlv4xOJF7IXikGsSUtU/rxTvi4WUaGN5xcUsKcYTEM+mJqfp+ttCs6fxWpKWySEwHzs/eRS9aBY/VdvRarJK1bJKrQXXIIQEKzObqJNJ9TaE2qcen1TgHof0OAqfgd2HWLPJAeBnrO6J/2RV1zg7xtjTxGkpIAZt6SUOhsAhggXskQ9yCj4x35EQGw0SO86OgYyTqxjBaQBRUeqtlP+1SgH+vgVWRsng2XEJ72zNLxNQhaFtZXk0qWjY8Fjes8hgIlKv1V6uECrJJC4RrkHbkThScCEalIrnx0K3XON2l4vAWAvd+PBOogxGCvRb3hmeRD+S+aSAI89LupjUxVrGmZ2VjZiv/9QIRMPNoLmUUBQFsEQ+X3FpJ X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Sep 2026 03:36:48.4722 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 0c2b0759-dc4d-456d-03e5-08df0e239458 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: SN1PEPF000397B5.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB8690 From: "Mario Limonciello (AMD)" EPP tunings are going to be more important going forward. Show a warning if on a heterogeneous platform without them. Suggested-by: Christian Ludloff Signed-off-by: Mario Limonciello (AMD) --- drivers/cpufreq/amd-pstate.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 380294bb56cd7..ae6caef389bd7 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -2376,8 +2376,12 @@ static void __init amd_pstate_init_epp_values(void) const struct x86_cpu_id *id = x86_match_cpu(amd_pstate_epp_soc_ids); const struct amd_pstate_epp_soc *soc; - if (!id || !id->driver_data) + if (!id || !id->driver_data) { + if (cpu_feature_enabled(X86_FEATURE_ZEN6) && + cpu_feature_enabled(X86_FEATURE_AMD_HTR_CORES)) + pr_warn_once("No EPP tunings found for platform\n"); return; + } soc = (const struct amd_pstate_epp_soc *)id->driver_data; -- 2.43.0