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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 V6 2/7] acpi: cppc: Add get the highest performance cppc control Date: Fri, 8 Sep 2023 15:46:48 +0800 Message-ID: <20230908074653.2799055-3-li.meng@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230908074653.2799055-1-li.meng@amd.com> References: <20230908074653.2799055-1-li.meng@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PEPF000044FD:EE_|DS7PR12MB6143:EE_ X-MS-Office365-Filtering-Correlation-Id: 372681d0-7925-4457-2f16-08dbb03fe413 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)(346002)(136003)(396003)(39860400002)(376002)(1800799009)(186009)(82310400011)(451199024)(40470700004)(36840700001)(46966006)(7696005)(966005)(478600001)(1076003)(2616005)(26005)(336012)(16526019)(426003)(2906002)(54906003)(6636002)(316002)(70586007)(70206006)(110136005)(41300700001)(5660300002)(4326008)(8676002)(8936002)(40460700003)(82740400003)(40480700001)(47076005)(36860700001)(36756003)(86362001)(356005)(81166007)(15583001)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Sep 2023 07:47:45.7385 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 372681d0-7925-4457-2f16-08dbb03fe413 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: CO1PEPF000044FD.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB6143 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. Reviewed-by: Mario Limonciello Reviewed-by: Wyes Karny Acked-by: Huang Rui Signed-off-by: Meng Li 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;