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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 V4 2/7] acpi: cppc: Add get the highest performance cppc control Date: Tue, 29 Aug 2023 14:43:35 +0800 Message-ID: <20230829064340.1136448-3-li.meng@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230829064340.1136448-1-li.meng@amd.com> References: <20230829064340.1136448-1-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: CO1PEPF000044EE:EE_|CY8PR12MB7707:EE_ X-MS-Office365-Filtering-Correlation-Id: 8efec217-cd65-4b2a-ca00-08dba85b5ef7 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)(451199024)(1800799009)(186009)(82310400011)(46966006)(36840700001)(40470700004)(82740400003)(6666004)(7696005)(36756003)(40460700003)(86362001)(356005)(81166007)(40480700001)(36860700001)(47076005)(2616005)(1076003)(2906002)(336012)(426003)(26005)(16526019)(966005)(478600001)(110136005)(41300700001)(70586007)(54906003)(70206006)(8936002)(8676002)(4326008)(5660300002)(6636002)(316002)(15583001)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Aug 2023 06:44:19.0126 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 8efec217-cd65-4b2a-ca00-08dba85b5ef7 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: CO1PEPF000044EE.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR12MB7707 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 Reviewed-by: Wyes Karny 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;