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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 , Wyes Karny Subject: [PATCH V5 2/7] acpi: cppc: Add get the highest performance cppc control Date: Tue, 5 Sep 2023 09:51:11 +0800 Message-ID: <20230905015116.2268926-3-li.meng@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230905015116.2268926-1-li.meng@amd.com> References: <20230905015116.2268926-1-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_|DM4PR12MB8558:EE_ X-MS-Office365-Filtering-Correlation-Id: 5d6848bc-7f2c-4300-c552-08dbadb2b031 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)(396003)(39860400002)(376002)(136003)(346002)(1800799009)(451199024)(186009)(82310400011)(46966006)(36840700001)(40470700004)(70206006)(316002)(6636002)(36756003)(110136005)(54906003)(86362001)(70586007)(2906002)(40480700001)(8936002)(5660300002)(8676002)(4326008)(40460700003)(41300700001)(1076003)(36860700001)(336012)(2616005)(426003)(16526019)(47076005)(26005)(966005)(478600001)(81166007)(356005)(82740400003)(7696005)(6666004)(15583001)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Sep 2023 01:51:57.3799 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5d6848bc-7f2c-4300-c552-08dbadb2b031 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: DM4PR12MB8558 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@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 Reviewed-by: Wyes Karny Link: https://uefi.org/specs/ACPI/6.5/08_Processor_Configuration_and_Control.html?highlight=cppc#cpc-continuous-performance-control Acked-by: Huang Rui --- 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;