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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 V4 4/7] cpufreq: Add a notification message that the highest perf has changed Date: Tue, 29 Aug 2023 14:43:37 +0800 Message-ID: <20230829064340.1136448-5-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: CO1PEPF000044F5:EE_|LV3PR12MB9401:EE_ X-MS-Office365-Filtering-Correlation-Id: 9068fe20-67d6-4d2a-9a0b-08dba85b64d1 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)(346002)(136003)(39860400002)(186009)(1800799009)(451199024)(82310400011)(40470700004)(36840700001)(46966006)(82740400003)(7696005)(70206006)(110136005)(6666004)(40480700001)(40460700003)(36756003)(86362001)(47076005)(81166007)(356005)(36860700001)(1076003)(2616005)(2906002)(336012)(426003)(16526019)(15650500001)(83380400001)(26005)(478600001)(70586007)(4326008)(5660300002)(966005)(8936002)(54906003)(41300700001)(6636002)(316002)(8676002)(226483002)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Aug 2023 06:44:28.8130 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9068fe20-67d6-4d2a-9a0b-08dba85b64d1 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: CO1PEPF000044F5.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV3PR12MB9401 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org ACPI 6.5 section 8.4.6.1.1.1 specifies that Notify event 0x85 can be emmitted to cause the the OSPM to re-evaluate the highest performance register. Add support for this event. 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/processor_driver.c | 6 ++++++ drivers/cpufreq/cpufreq.c | 13 +++++++++++++ include/linux/cpufreq.h | 4 ++++ 3 files changed, 23 insertions(+) diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c index 4bd16b3f0781..29b2fb68a35d 100644 --- a/drivers/acpi/processor_driver.c +++ b/drivers/acpi/processor_driver.c @@ -27,6 +27,7 @@ #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80 #define ACPI_PROCESSOR_NOTIFY_POWER 0x81 #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82 +#define ACPI_PROCESSOR_NOTIFY_HIGEST_PERF_CHANGED 0x85 MODULE_AUTHOR("Paul Diefenbaugh"); MODULE_DESCRIPTION("ACPI Processor Driver"); @@ -83,6 +84,11 @@ static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) acpi_bus_generate_netlink_event(device->pnp.device_class, dev_name(&device->dev), event, 0); break; + case ACPI_PROCESSOR_NOTIFY_HIGEST_PERF_CHANGED: + cpufreq_update_highest_perf(pr->id); + acpi_bus_generate_netlink_event(device->pnp.device_class, + dev_name(&device->dev), event, 0); + break; default: acpi_handle_debug(handle, "Unsupported event [0x%x]\n", event); break; diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 50bbc969ffe5..842357abfae6 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -2675,6 +2675,19 @@ void cpufreq_update_limits(unsigned int cpu) } EXPORT_SYMBOL_GPL(cpufreq_update_limits); +/** + * cpufreq_update_highest_perf - Update highest performance for a given CPU. + * @cpu: CPU to update the highest performance for. + * + * Invoke the driver's ->update_highest_perf callback if present + */ +void cpufreq_update_highest_perf(unsigned int cpu) +{ + if (cpufreq_driver->update_highest_perf) + cpufreq_driver->update_highest_perf(cpu); +} +EXPORT_SYMBOL_GPL(cpufreq_update_highest_perf); + /********************************************************************* * BOOST * *********************************************************************/ diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 9bf94ae08158..58106b3d9183 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -232,6 +232,7 @@ int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu); void refresh_frequency_limits(struct cpufreq_policy *policy); void cpufreq_update_policy(unsigned int cpu); void cpufreq_update_limits(unsigned int cpu); +void cpufreq_update_highest_perf(unsigned int cpu); bool have_governor_per_policy(void); bool cpufreq_supports_freq_invariance(void); struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy); @@ -377,6 +378,9 @@ struct cpufreq_driver { /* Called to update policy limits on firmware notifications. */ void (*update_limits)(unsigned int cpu); + /* Called to update highest performance on firmware notifications. */ + void (*update_highest_perf)(unsigned int cpu); + /* optional */ int (*bios_limit)(int cpu, unsigned int *limit);