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Wysocki" , Huang Rui CC: , , , , Shuah Khan , , "Nathan Fontenot" , Deepak Sharma , Alex Deucher , Mario Limonciello , Shimmer Huang , "Perry Yuan" , Xiaojian Du , Viresh Kumar , Borislav Petkov , Meng Li Subject: [PATCH V3 2/7] acpi: cppc: Add get the highest performance cppc control Date: Thu, 24 Aug 2023 10:12:44 +0800 Message-ID: <20230824021249.271946-3-li.meng@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230824021249.271946-1-li.meng@amd.com> References: <20230824021249.271946-1-li.meng@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000EDD3:EE_|CH3PR12MB9026:EE_ X-MS-Office365-Filtering-Correlation-Id: c792e3c4-69ed-4631-85a0-08dba447c4f1 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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:CAL; SFV:NSPM; H:SATLEXMB04.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230031)(4636009)(376002)(396003)(39860400002)(346002)(136003)(186009)(1800799009)(82310400011)(451199024)(36840700001)(40470700004)(46966006)(1076003)(40460700003)(2616005)(5660300002)(4326008)(8676002)(8936002)(336012)(47076005)(426003)(36756003)(36860700001)(26005)(16526019)(40480700001)(82740400003)(356005)(6666004)(81166007)(70206006)(70586007)(54906003)(6636002)(316002)(110136005)(478600001)(966005)(41300700001)(2906002)(7696005)(86362001)(15583001)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Aug 2023 02:13:55.5290 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: c792e3c4-69ed-4631-85a0-08dba447c4f1 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EDD3.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB9026 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Add support for getting the highest performance to the generic CPPC driver. This enables downstream drivers such as amd-pstate to discover and use these values. Please refer to the ACPI_Spec for details on continuous performance control of CPPC. Signed-off-by: Meng Li Reviewed-by: Mario Limonciello Link: https://uefi.org/specs/ACPI/6.5/08_Processor_Configuration_and_Control.html?highlight=cppc#cpc-continuous-performance-control --- drivers/acpi/cppc_acpi.c | 13 +++++++++++++ include/acpi/cppc_acpi.h | 5 +++++ 2 files changed, 18 insertions(+) diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index 7ff269a78c20..ad388a0e8484 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -1154,6 +1154,19 @@ int cppc_get_nominal_perf(int cpunum, u64 *nominal_perf) return cppc_get_perf(cpunum, NOMINAL_PERF, nominal_perf); } +/** + * cppc_get_highest_perf - Get the highest performance register value. + * @cpunum: CPU from which to get highest performance. + * @highest_perf: Return address. + * + * Return: 0 for success, -EIO otherwise. + */ +int cppc_get_highest_perf(int cpunum, u64 *highest_perf) +{ + return cppc_get_perf(cpunum, HIGHEST_PERF, highest_perf); +} +EXPORT_SYMBOL_GPL(cppc_get_highest_perf); + /** * cppc_get_epp_perf - Get the epp register value. * @cpunum: CPU from which to get epp preference value. diff --git a/include/acpi/cppc_acpi.h b/include/acpi/cppc_acpi.h index 6126c977ece0..c0b69ffe7bdb 100644 --- a/include/acpi/cppc_acpi.h +++ b/include/acpi/cppc_acpi.h @@ -139,6 +139,7 @@ struct cppc_cpudata { #ifdef CONFIG_ACPI_CPPC_LIB extern int cppc_get_desired_perf(int cpunum, u64 *desired_perf); extern int cppc_get_nominal_perf(int cpunum, u64 *nominal_perf); +extern int cppc_get_highest_perf(int cpunum, u64 *highest_perf); extern int cppc_get_perf_ctrs(int cpu, struct cppc_perf_fb_ctrs *perf_fb_ctrs); extern int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls); extern int cppc_set_enable(int cpu, bool enable); @@ -165,6 +166,10 @@ static inline int cppc_get_nominal_perf(int cpunum, u64 *nominal_perf) { return -ENOTSUPP; } +static inline int cppc_get_highest_perf(int cpunum, u64 *highest_perf) +{ + return -ENOTSUPP; +} static inline int cppc_get_perf_ctrs(int cpu, struct cppc_perf_fb_ctrs *perf_fb_ctrs) { return -ENOTSUPP;