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Fri, 6 Jan 2023 00:14:31 -0600 From: Perry Yuan To: , , , CC: , , , , , , , , Subject: [PATCH v10 01/12] ACPI: CPPC: Add AMD pstate energy performance preference cppc control Date: Fri, 6 Jan 2023 14:14:09 +0800 Message-ID: <20230106061420.95715-2-perry.yuan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230106061420.95715-1-perry.yuan@amd.com> References: <20230106061420.95715-1-perry.yuan@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: DS1PEPF0000E634:EE_|CH2PR12MB4955:EE_ X-MS-Office365-Filtering-Correlation-Id: 0189644b-3274-49b1-82b7-08daefad48ec 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:(13230022)(4636009)(136003)(346002)(39860400002)(396003)(376002)(451199015)(36840700001)(40470700004)(46966006)(47076005)(426003)(336012)(16526019)(186003)(2616005)(82310400005)(1076003)(26005)(7696005)(6666004)(83380400001)(40480700001)(86362001)(40460700003)(36756003)(36860700001)(356005)(82740400003)(81166007)(41300700001)(2906002)(8676002)(8936002)(70586007)(4326008)(5660300002)(44832011)(110136005)(478600001)(70206006)(54906003)(316002)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Jan 2023 06:14:35.7405 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 0189644b-3274-49b1-82b7-08daefad48ec 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: DS1PEPF0000E634.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR12MB4955 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1754252758491112783?= X-GMAIL-MSGID: =?utf-8?q?1754252758491112783?= From: Perry Yuan Add support for setting and querying EPP preferences to the generic CPPC driver. This enables downstream drivers such as amd-pstate to discover and use these values. Downstream drivers that want to use the new symbols cppc_get_epp_caps and cppc_set_epp_perf for querying and setting EPP preferences will need to call cppc_set_epp_perf to enable the EPP function firstly. Reviewed-by: Mario Limonciello Reviewed-by: Wyes Karny Signed-off-by: Perry Yuan Acked-by: Huang Rui --- drivers/acpi/cppc_acpi.c | 67 ++++++++++++++++++++++++++++++++++++++++ include/acpi/cppc_acpi.h | 12 +++++++ 2 files changed, 79 insertions(+) diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index 093675b1a1ff..0ce6c55a76ca 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -1153,6 +1153,19 @@ int cppc_get_nominal_perf(int cpunum, u64 *nominal_perf) return cppc_get_perf(cpunum, NOMINAL_PERF, nominal_perf); } +/** + * cppc_get_epp_perf - Get the epp register value. + * @cpunum: CPU from which to get epp preference value. + * @epp_perf: Return address. + * + * Return: 0 for success, -EIO otherwise. + */ +int cppc_get_epp_perf(int cpunum, u64 *epp_perf) +{ + return cppc_get_perf(cpunum, ENERGY_PERF, epp_perf); +} +EXPORT_SYMBOL_GPL(cppc_get_epp_perf); + /** * cppc_get_perf_caps - Get a CPU's performance capabilities. * @cpunum: CPU from which to get capabilities info. @@ -1365,6 +1378,60 @@ int cppc_get_perf_ctrs(int cpunum, struct cppc_perf_fb_ctrs *perf_fb_ctrs) } EXPORT_SYMBOL_GPL(cppc_get_perf_ctrs); +/* + * Set Energy Performance Preference Register value through + * Performance Controls Interface + */ +int cppc_set_epp_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls, bool enable) +{ + int pcc_ss_id = per_cpu(cpu_pcc_subspace_idx, cpu); + struct cpc_register_resource *epp_set_reg; + struct cpc_register_resource *auto_sel_reg; + struct cpc_desc *cpc_desc = per_cpu(cpc_desc_ptr, cpu); + struct cppc_pcc_data *pcc_ss_data = NULL; + int ret; + + if (!cpc_desc) { + pr_debug("No CPC descriptor for CPU:%d\n", cpu); + return -ENODEV; + } + + auto_sel_reg = &cpc_desc->cpc_regs[AUTO_SEL_ENABLE]; + epp_set_reg = &cpc_desc->cpc_regs[ENERGY_PERF]; + + if (CPC_IN_PCC(epp_set_reg) || CPC_IN_PCC(auto_sel_reg)) { + if (pcc_ss_id < 0) { + pr_debug("Invalid pcc_ss_id for CPU:%d\n", cpu); + return -ENODEV; + } + + if (CPC_SUPPORTED(auto_sel_reg)) { + ret = cpc_write(cpu, auto_sel_reg, enable); + if (ret) + return ret; + } + + if (CPC_SUPPORTED(epp_set_reg)) { + ret = cpc_write(cpu, epp_set_reg, perf_ctrls->energy_perf); + if (ret) + return ret; + } + + pcc_ss_data = pcc_data[pcc_ss_id]; + + down_write(&pcc_ss_data->pcc_lock); + /* after writing CPC, transfer the ownership of PCC to platform */ + ret = send_pcc_cmd(pcc_ss_id, CMD_WRITE); + up_write(&pcc_ss_data->pcc_lock); + } else { + ret = -ENOTSUPP; + pr_debug("_CPC in PCC is not supported\n"); + } + + return ret; +} +EXPORT_SYMBOL_GPL(cppc_set_epp_perf); + /** * cppc_set_enable - Set to enable CPPC on the processor by writing the * Continuous Performance Control package EnableRegister field. diff --git a/include/acpi/cppc_acpi.h b/include/acpi/cppc_acpi.h index c5614444031f..6b487a5bd638 100644 --- a/include/acpi/cppc_acpi.h +++ b/include/acpi/cppc_acpi.h @@ -108,12 +108,14 @@ struct cppc_perf_caps { u32 lowest_nonlinear_perf; u32 lowest_freq; u32 nominal_freq; + u32 energy_perf; }; struct cppc_perf_ctrls { u32 max_perf; u32 min_perf; u32 desired_perf; + u32 energy_perf; }; struct cppc_perf_fb_ctrs { @@ -149,6 +151,8 @@ extern bool cpc_ffh_supported(void); extern bool cpc_supported_by_cpu(void); extern int cpc_read_ffh(int cpunum, struct cpc_reg *reg, u64 *val); extern int cpc_write_ffh(int cpunum, struct cpc_reg *reg, u64 val); +extern int cppc_get_epp_perf(int cpunum, u64 *epp_perf); +extern int cppc_set_epp_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls, bool enable); #else /* !CONFIG_ACPI_CPPC_LIB */ static inline int cppc_get_desired_perf(int cpunum, u64 *desired_perf) { @@ -202,6 +206,14 @@ static inline int cpc_write_ffh(int cpunum, struct cpc_reg *reg, u64 val) { return -ENOTSUPP; } +static inline int cppc_set_epp_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls, bool enable) +{ + return -ENOTSUPP; +} +static inline int cppc_get_epp_perf(int cpunum, u64 *epp_perf) +{ + return -ENOTSUPP; +} #endif /* !CONFIG_ACPI_CPPC_LIB */ #endif /* _CPPC_ACPI_H*/ From patchwork Fri Jan 6 06:14:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Yuan, Perry" X-Patchwork-Id: 39953 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:4e01:0:0:0:0:0 with SMTP id p1csp668860wrt; 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Fri, 6 Jan 2023 00:14:35 -0600 From: Perry Yuan To: , , , CC: , , , , , , , , Subject: [PATCH v10 02/12] Documentation: amd-pstate: add EPP profiles introduction Date: Fri, 6 Jan 2023 14:14:10 +0800 Message-ID: <20230106061420.95715-3-perry.yuan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230106061420.95715-1-perry.yuan@amd.com> References: <20230106061420.95715-1-perry.yuan@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: DS1PEPF0000E633:EE_|SJ1PR12MB6265:EE_ X-MS-Office365-Filtering-Correlation-Id: c0a2a547-dfe9-431c-741a-08daefad4ec2 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:(13230022)(4636009)(346002)(376002)(136003)(396003)(39860400002)(451199015)(40470700004)(46966006)(36840700001)(36756003)(2906002)(5660300002)(8936002)(44832011)(41300700001)(47076005)(83380400001)(36860700001)(82740400003)(356005)(86362001)(426003)(70206006)(110136005)(70586007)(40460700003)(54906003)(81166007)(336012)(478600001)(7696005)(6666004)(40480700001)(82310400005)(16526019)(26005)(1076003)(4326008)(186003)(8676002)(2616005)(316002)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Jan 2023 06:14:45.5156 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: c0a2a547-dfe9-431c-741a-08daefad4ec2 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: DS1PEPF0000E633.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ1PR12MB6265 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1754252766030298478?= X-GMAIL-MSGID: =?utf-8?q?1754252766030298478?= From: Perry Yuan The amd-pstate driver supports a feature called energy performance preference (EPP). Add information to the documentation to explain how users can interact with the sysfs files for this feature. 1) See all EPP profiles $ sudo cat /sys/devices/system/cpu/cpu0/cpufreq/energy_performance_available_preferences default performance balance_performance balance_power power 2) Check current EPP profile $ sudo cat /sys/devices/system/cpu/cpu0/cpufreq/energy_performance_preference performance 3) Set new EPP profile $ sudo bash -c "echo power > /sys/devices/system/cpu/cpu0/cpufreq/energy_performance_preference" Reviewed-by: Mario Limonciello Signed-off-by: Perry Yuan Acked-by: Huang Rui --- Documentation/admin-guide/pm/amd-pstate.rst | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/Documentation/admin-guide/pm/amd-pstate.rst b/Documentation/admin-guide/pm/amd-pstate.rst index 06e23538f79c..33ab8ec8fc2f 100644 --- a/Documentation/admin-guide/pm/amd-pstate.rst +++ b/Documentation/admin-guide/pm/amd-pstate.rst @@ -262,6 +262,25 @@ lowest non-linear performance in `AMD CPPC Performance Capability `_.) This attribute is read-only. +``energy_performance_available_preferences`` + +A list of all the supported EPP preferences that could be used for +``energy_performance_preference`` on this system. +These profiles represent different hints that are provided +to the low-level firmware about the user's desired energy vs efficiency +tradeoff. ``default`` represents the epp value is set by platform +firmware. This attribute is read-only. + +``energy_performance_preference`` + +The current energy performance preference can be read from this attribute. +and user can change current preference according to energy or performance needs +Please get all support profiles list from +``energy_performance_available_preferences`` attribute, all the profiles are +integer values defined between 0 to 255 when EPP feature is enabled by platform +firmware, if EPP feature is disabled, driver will ignore the written value +This attribute is read-write. + Other performance and frequency values can be read back from ``/sys/devices/system/cpu/cpuX/acpi_cppc/``, see :ref:`cppc_sysfs`. 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Fri, 6 Jan 2023 00:14:44 -0600 From: Perry Yuan To: , , , CC: , , , , , , , , Subject: [PATCH v10 03/12] cpufreq: intel_pstate: use common macro definition for Energy Preference Performance(EPP) Date: Fri, 6 Jan 2023 14:14:11 +0800 Message-ID: <20230106061420.95715-4-perry.yuan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230106061420.95715-1-perry.yuan@amd.com> References: <20230106061420.95715-1-perry.yuan@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: DS1PEPF0000E633:EE_|SJ0PR12MB6808:EE_ X-MS-Office365-Filtering-Correlation-Id: 2565088e-1056-4d5d-e1b1-08daefad5118 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:(13230022)(4636009)(39860400002)(346002)(376002)(396003)(136003)(451199015)(46966006)(40470700004)(36840700001)(7696005)(186003)(40460700003)(26005)(40480700001)(36756003)(478600001)(16526019)(86362001)(41300700001)(316002)(336012)(81166007)(82740400003)(426003)(36860700001)(356005)(5660300002)(2906002)(44832011)(47076005)(110136005)(83380400001)(8936002)(8676002)(54906003)(1076003)(2616005)(82310400005)(70586007)(4326008)(70206006)(6666004)(36900700001);DIR:OUT;SFP:1101; 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This will simpify the intel_pstate and amd_pstate driver. Signed-off-by: Perry Yuan --- drivers/acpi/cppc_acpi.c | 29 +++++++++++++++++++++++++++ drivers/cpufreq/intel_pstate.c | 36 ---------------------------------- include/acpi/cppc_acpi.h | 10 ++++++++++ 3 files changed, 39 insertions(+), 36 deletions(-) diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index 0ce6c55a76ca..c7aa190ec2d2 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -42,6 +42,35 @@ #include +/* + * EPP/EPB display strings corresponding to EPP index in the + * energy_perf_strings[] + * index String + *------------------------------------- + * 0 default + * 1 performance + * 2 balance_performance + * 3 balance_power + * 4 power + */ + +const char * const energy_perf_strings[] = { + [EPP_INDEX_DEFAULT] = "default", + [EPP_INDEX_PERFORMANCE] = "performance", + [EPP_INDEX_BALANCE_PERFORMANCE] = "balance_performance", + [EPP_INDEX_BALANCE_POWERSAVE] = "balance_power", + [EPP_INDEX_POWERSAVE] = "power", + NULL +}; + +unsigned int epp_values[] = { + [EPP_INDEX_DEFAULT] = 0, /* Unused index */ + [EPP_INDEX_PERFORMANCE] = HWP_EPP_PERFORMANCE, + [EPP_INDEX_BALANCE_PERFORMANCE] = HWP_EPP_BALANCE_PERFORMANCE, + [EPP_INDEX_BALANCE_POWERSAVE] = HWP_EPP_BALANCE_POWERSAVE, + [EPP_INDEX_POWERSAVE] = HWP_EPP_POWERSAVE, +}; + struct cppc_pcc_data { struct pcc_mbox_chan *pcc_channel; void __iomem *pcc_comm_addr; diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index ad9be31753b6..01431e279be6 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -628,42 +628,6 @@ static int intel_pstate_set_epb(int cpu, s16 pref) return 0; } -/* - * EPP/EPB display strings corresponding to EPP index in the - * energy_perf_strings[] - * index String - *------------------------------------- - * 0 default - * 1 performance - * 2 balance_performance - * 3 balance_power - * 4 power - */ - -enum energy_perf_value_index { - EPP_INDEX_DEFAULT = 0, - EPP_INDEX_PERFORMANCE, - EPP_INDEX_BALANCE_PERFORMANCE, - EPP_INDEX_BALANCE_POWERSAVE, - EPP_INDEX_POWERSAVE, -}; - -static const char * const energy_perf_strings[] = { - [EPP_INDEX_DEFAULT] = "default", - [EPP_INDEX_PERFORMANCE] = "performance", - [EPP_INDEX_BALANCE_PERFORMANCE] = "balance_performance", - [EPP_INDEX_BALANCE_POWERSAVE] = "balance_power", - [EPP_INDEX_POWERSAVE] = "power", - NULL -}; -static unsigned int epp_values[] = { - [EPP_INDEX_DEFAULT] = 0, /* Unused index */ - [EPP_INDEX_PERFORMANCE] = HWP_EPP_PERFORMANCE, - [EPP_INDEX_BALANCE_PERFORMANCE] = HWP_EPP_BALANCE_PERFORMANCE, - [EPP_INDEX_BALANCE_POWERSAVE] = HWP_EPP_BALANCE_POWERSAVE, - [EPP_INDEX_POWERSAVE] = HWP_EPP_POWERSAVE, -}; - static int intel_pstate_get_energy_pref_index(struct cpudata *cpu_data, int *raw_epp) { s16 epp; diff --git a/include/acpi/cppc_acpi.h b/include/acpi/cppc_acpi.h index 6b487a5bd638..891e5add0e49 100644 --- a/include/acpi/cppc_acpi.h +++ b/include/acpi/cppc_acpi.h @@ -135,6 +135,16 @@ struct cppc_cpudata { cpumask_var_t shared_cpu_map; }; +enum energy_perf_value_index { + EPP_INDEX_DEFAULT = 0, + EPP_INDEX_PERFORMANCE, + EPP_INDEX_BALANCE_PERFORMANCE, + EPP_INDEX_BALANCE_POWERSAVE, + EPP_INDEX_POWERSAVE, +}; +extern const char * const energy_perf_strings[]; +extern unsigned int epp_values[]; + #ifdef CONFIG_ACPI_CPPC_LIB extern int cppc_get_desired_perf(int cpunum, u64 *desired_perf); 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Fri, 6 Jan 2023 00:14:49 -0600 From: Perry Yuan To: , , , CC: , , , , , , , , Subject: [PATCH v10 04/12] cpufreq: amd-pstate: optimize driver working mode selection in amd_pstate_param() Date: Fri, 6 Jan 2023 14:14:12 +0800 Message-ID: <20230106061420.95715-5-perry.yuan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230106061420.95715-1-perry.yuan@amd.com> References: <20230106061420.95715-1-perry.yuan@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: DS1PEPF0000E633:EE_|PH0PR12MB5450:EE_ X-MS-Office365-Filtering-Correlation-Id: f317e992-ea38-410b-eced-08daefad536c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: GkEiWJaxo9qShqDzO7HH3tDLz0ziisilBcULzMx5a1rdHTKUZ6cGEy0YcUcVYdmL3/ob6J9cx3S/91fZHG7mUys6xq0SWsXYLr6o1Rvxi71Ax3RrluBvj2epaeaiDnrJp2DURoxYA3b3NUK89psYb35zZ1lxXOumt+vAT3NvmnJcBlDhBs8V4Q0h6VtQpca2+CLl5wA4O06AqtX3mXDnzrHpA3Yvzyw+XBXuLoOIJRHuQjagKrU7ZMgVdvX6O1QI9d78un1mzNon4rUbRTmEzV1Ida497UwjOQsEbKo9jgBiqxJK/zIeD/XYU50YTzFaI0a4HHdW4RUsSy7swRnrv9k9kKKPVr2n5MlCMkfQ04DrfloNqcG8Nb92piOnK/QLhM/jjvystszXBZK1TsAP8Bj6OC7ILR++cke+xeXNXeOLmRSAgYHv8mZfFZza5R0MItux4QuzuvAvi3fZCqRc/ZZJCPkmdOXJCY37ZFrqy8mZLJ33JecMQ10thbvPuhfEZlyH68tNAIuNjm3ZQOJHN4FDtK3NOjNLnMEWyrHRehQos2g8asRqElhIRVw9lRzmMrf1fiKZcpoRIJxFLiT7ikLgiITwB0Sujs2vM3cE2dpaXIwoc+ywWMBirz8lJt2zCsc46o52AA3Sw/WtzGfaLReDDwaaljdUuV94XqTipvJE5VsUnsYOWVuvDYyD2POjS76gwW5TbeUKL5osUauqeQqAdDrG6X5OJDSoAZUO2dc= 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:(13230022)(4636009)(39860400002)(136003)(346002)(396003)(376002)(451199015)(36840700001)(40470700004)(46966006)(8936002)(83380400001)(5660300002)(44832011)(41300700001)(426003)(47076005)(2906002)(81166007)(40480700001)(40460700003)(356005)(82310400005)(86362001)(36756003)(82740400003)(26005)(110136005)(186003)(54906003)(16526019)(316002)(36860700001)(6666004)(7696005)(2616005)(1076003)(478600001)(4326008)(70206006)(336012)(8676002)(70586007)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Jan 2023 06:14:53.3593 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f317e992-ea38-410b-eced-08daefad536c 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: DS1PEPF0000E633.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR12MB5450 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1754252788412445636?= X-GMAIL-MSGID: =?utf-8?q?1754252788412445636?= From: Wyes Karny The amd-pstate driver may support multiple working modes. Introduce a variable to keep track of which mode is currently enabled. Here we use cppc_state var to indicate which mode is enabled. This change will help to simplify the the amd_pstate_param() to choose which mode used for the following driver registration. Reviewed-by: Mario Limonciello Signed-off-by: Perry Yuan Signed-off-by: Wyes Karny Acked-by: Huang Rui --- drivers/cpufreq/amd-pstate.c | 39 +++++++++++++++++++++++++++--------- include/linux/amd-pstate.h | 17 ++++++++++++++++ 2 files changed, 46 insertions(+), 10 deletions(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 204e39006dda..1a8b31277620 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -60,7 +60,18 @@ * module parameter to be able to enable it manually for debugging. */ static struct cpufreq_driver amd_pstate_driver; -static int cppc_load __initdata; +static int cppc_state = AMD_PSTATE_DISABLE; + +static inline int get_mode_idx_from_str(const char *str, size_t size) +{ + int i; + + for (i=0; i < AMD_PSTATE_MAX; i++) { + if (!strncmp(str, amd_pstate_mode_string[i], size)) + return i; + } + return -EINVAL; +} static inline int pstate_enable(bool enable) { @@ -625,10 +636,10 @@ static int __init amd_pstate_init(void) /* * by default the pstate driver is disabled to load * enable the amd_pstate passive mode driver explicitly - * with amd_pstate=passive in kernel command line + * with amd_pstate=passive or other modes in kernel command line */ - if (!cppc_load) { - pr_debug("driver load is disabled, boot with amd_pstate=passive to enable this\n"); + if (cppc_state == AMD_PSTATE_DISABLE) { + pr_debug("driver load is disabled, boot with specific mode to enable this\n"); return -ENODEV; } @@ -670,16 +681,24 @@ device_initcall(amd_pstate_init); static int __init amd_pstate_param(char *str) { + size_t size; + int mode_idx; + if (!str) return -EINVAL; - if (!strcmp(str, "disable")) { - cppc_load = 0; - pr_info("driver is explicitly disabled\n"); - } else if (!strcmp(str, "passive")) - cppc_load = 1; + size = strlen(str); + mode_idx = get_mode_idx_from_str(str, size); - return 0; + if (mode_idx >= AMD_PSTATE_DISABLE && mode_idx < AMD_PSTATE_MAX) { + cppc_state = mode_idx; + if (cppc_state == AMD_PSTATE_DISABLE) + pr_info("driver is explicitly disabled\n"); + + return 0; + } + + return -EINVAL; } early_param("amd_pstate", amd_pstate_param); diff --git a/include/linux/amd-pstate.h b/include/linux/amd-pstate.h index 1c4b8659f171..dae2ce0f6735 100644 --- a/include/linux/amd-pstate.h +++ b/include/linux/amd-pstate.h @@ -74,4 +74,21 @@ struct amd_cpudata { bool boost_supported; }; +/* + * enum amd_pstate_mode - driver working mode of amd pstate + */ +enum amd_pstate_mode { + AMD_PSTATE_DISABLE = 0, + AMD_PSTATE_PASSIVE, + AMD_PSTATE_ACTIVE, + AMD_PSTATE_MAX, +}; + +static const char * const amd_pstate_mode_string[] = { + [AMD_PSTATE_DISABLE] = "disable", + [AMD_PSTATE_PASSIVE] = "passive", + [AMD_PSTATE_ACTIVE] = "active", + NULL, +}; + #endif /* _LINUX_AMD_PSTATE_H */ From patchwork Fri Jan 6 06:14:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Yuan, Perry" X-Patchwork-Id: 39955 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:4e01:0:0:0:0:0 with SMTP id p1csp668974wrt; Thu, 5 Jan 2023 22:17:16 -0800 (PST) X-Google-Smtp-Source: AMrXdXvGv9WRwUncbe8T5oY72ZthzXnXc05EGbEVsvIBRxKm1hq/pvUQb+Ib7mSiNQWOiWjcc1Jp X-Received: by 2002:a17:907:6f18:b0:837:3ed3:9c2b with SMTP id sy24-20020a1709076f1800b008373ed39c2bmr51594856ejc.5.1672985836691; Thu, 05 Jan 2023 22:17:16 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1672985836; cv=pass; d=google.com; s=arc-20160816; b=t7tMBn9dzd9+yFiXH6d7jyyauPqYBFMPONPbCRV85thKc57r9Fi/vQMN6rT2VlltGk 9fQ/yoWB/oq+7FCGpwAIocQ1pDtXZsA0x8KKDsO8q+NAVHFW9xLCHkwX7MjE2nwNjopF uYoT8ki43O8CM9hnPJvSwPxB5GMgkBUvs1pE39COGdXMefs6InhovjexDGWQgmQu/fJj z1LtIg1EcJnOEskMOTUCE9HzcDOMyu6trTQZPYBHDt1NtSHsqYMHAo4JMg7FagCZfhBG pFwjIj0/mSpWUDacntmV/Moz3GQKOQzPKHT7kAATAwq223tmxToLZd3JYEHcCQYIqf7F +H6g== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=fjNk/Yg9cp/Hbs/emrPgDzuFqz8DhyuBJXkwlFZ3DAM=; b=oF9c+uah4qyDROcqnduqv9BEtZATcXbf7ArhdHpUkTF4ZG66gAbBWQOOo1/mxjy6Re 8DQP3MAyDObX0kGwfVjVJl/vCnAI4ksOZ977QrWTcLG65PUrG0PS9QpKFqKXGjV2Ql8e e+j4zWGCWf+2ZEKlK2xm/cMrZojmyEjRLJ27pyjVExstKLeqMRO/rkkla3SmkIj8AxUS VP3O35YasxCLhwUC8uSe1GnveH3X9CRuz0nzUmcbnza2tvNIFqshqExC34xFR9zk2Ys/ x8ld/zBhBu8sxNIkOxTwEV3TRiwucJyzx7z9CDxh6rWaKci0SuC6c/TIyND4uVtDheLB T6VA== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@amd.com header.s=selector1 header.b=Bqtq1mqQ; arc=pass (i=1 spf=pass spfdomain=amd.com dmarc=pass fromdomain=amd.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amd.com Received: from out1.vger.email (out1.vger.email. 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Fri, 6 Jan 2023 00:14:53 -0600 From: Perry Yuan To: , , , CC: , , , , , , , , Subject: [PATCH v10 05/12] cpufreq: amd-pstate: implement Pstate EPP support for the AMD processors Date: Fri, 6 Jan 2023 14:14:13 +0800 Message-ID: <20230106061420.95715-6-perry.yuan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230106061420.95715-1-perry.yuan@amd.com> References: <20230106061420.95715-1-perry.yuan@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: DS1PEPF0000E632:EE_|IA1PR12MB6258:EE_ X-MS-Office365-Filtering-Correlation-Id: e1517129-eb5f-4968-bd66-08daefad55df 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:(13230022)(4636009)(396003)(376002)(39860400002)(136003)(346002)(451199015)(36840700001)(40470700004)(46966006)(2906002)(5660300002)(44832011)(30864003)(8936002)(41300700001)(478600001)(4326008)(316002)(8676002)(54906003)(70206006)(110136005)(70586007)(6666004)(26005)(40480700001)(336012)(82310400005)(16526019)(83380400001)(426003)(47076005)(7696005)(1076003)(186003)(82740400003)(81166007)(356005)(2616005)(40460700003)(86362001)(36860700001)(36756003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Jan 2023 06:14:57.4516 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e1517129-eb5f-4968-bd66-08daefad55df 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: DS1PEPF0000E632.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB6258 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1754252796948987934?= X-GMAIL-MSGID: =?utf-8?q?1754252796948987934?= From: Perry Yuan Add EPP driver support for AMD SoCs which support a dedicated MSR for CPPC. EPP is used by the DPM controller to configure the frequency that a core operates at during short periods of activity. The SoC EPP targets are configured on a scale from 0 to 255 where 0 represents maximum performance and 255 represents maximum efficiency. The amd-pstate driver exports profile string names to userspace that are tied to specific EPP values. The balance_performance string (0x80) provides the best balance for efficiency versus power on most systems, but users can choose other strings to meet their needs as well. $ cat /sys/devices/system/cpu/cpufreq/policy0/energy_performance_available_preferences default performance balance_performance balance_power power $ cat /sys/devices/system/cpu/cpufreq/policy0/energy_performance_preference balance_performance To enable the driver,it needs to add `amd_pstate=active` to kernel command line and kernel will load the active mode epp driver Signed-off-by: Perry Yuan Acked-by: Huang Rui --- drivers/cpufreq/amd-pstate.c | 374 ++++++++++++++++++++++++++++++++++- include/linux/amd-pstate.h | 10 + 2 files changed, 378 insertions(+), 6 deletions(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 1a8b31277620..9a92c71af80f 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -59,7 +59,9 @@ * we disable it by default to go acpi-cpufreq on these processors and add a * module parameter to be able to enable it manually for debugging. */ +static struct cpufreq_driver *current_pstate_driver; static struct cpufreq_driver amd_pstate_driver; +static struct cpufreq_driver amd_pstate_epp_driver; static int cppc_state = AMD_PSTATE_DISABLE; static inline int get_mode_idx_from_str(const char *str, size_t size) @@ -73,6 +75,114 @@ static inline int get_mode_idx_from_str(const char *str, size_t size) return -EINVAL; } +static DEFINE_MUTEX(amd_pstate_limits_lock); +static DEFINE_MUTEX(amd_pstate_driver_lock); + +static s16 amd_pstate_get_epp(struct amd_cpudata *cpudata, u64 cppc_req_cached) +{ + u64 epp; + int ret; + + if (boot_cpu_has(X86_FEATURE_CPPC)) { + if (!cppc_req_cached) { + epp = rdmsrl_on_cpu(cpudata->cpu, MSR_AMD_CPPC_REQ, + &cppc_req_cached); + if (epp) + return epp; + } + epp = (cppc_req_cached >> 24) & 0xFF; + } else { + ret = cppc_get_epp_perf(cpudata->cpu, &epp); + if (ret < 0) { + pr_debug("Could not retrieve energy perf value (%d)\n", ret); + return -EIO; + } + } + + return (s16)(epp & 0xff); +} + +static int amd_pstate_get_energy_pref_index(struct amd_cpudata *cpudata) +{ + s16 epp; + int index = -EINVAL; + + epp = amd_pstate_get_epp(cpudata, 0); + if (epp < 0) + return epp; + + switch (epp) { + case HWP_EPP_PERFORMANCE: + index = EPP_INDEX_PERFORMANCE; + break; + case HWP_EPP_BALANCE_PERFORMANCE: + index = EPP_INDEX_BALANCE_PERFORMANCE; + break; + case HWP_EPP_BALANCE_POWERSAVE: + index = EPP_INDEX_BALANCE_POWERSAVE; + break; + case HWP_EPP_POWERSAVE: + index = EPP_INDEX_POWERSAVE; + break; + default: + break; + } + + return index; +} + +static int amd_pstate_set_epp(struct amd_cpudata *cpudata, u32 epp) +{ + int ret; + struct cppc_perf_ctrls perf_ctrls; + + if (boot_cpu_has(X86_FEATURE_CPPC)) { + u64 value = READ_ONCE(cpudata->cppc_req_cached); + + value &= ~GENMASK_ULL(31, 24); + value |= (u64)epp << 24; + WRITE_ONCE(cpudata->cppc_req_cached, value); + + ret = wrmsrl_on_cpu(cpudata->cpu, MSR_AMD_CPPC_REQ, value); + if (!ret) + cpudata->epp_cached = epp; + } else { + perf_ctrls.energy_perf = epp; + ret = cppc_set_epp_perf(cpudata->cpu, &perf_ctrls, 1); + if (ret) { + pr_debug("failed to set energy perf value (%d)\n", ret); + return ret; + } + cpudata->epp_cached = epp; + } + + return ret; +} + +static int amd_pstate_set_energy_pref_index(struct amd_cpudata *cpudata, + int pref_index) +{ + int epp = -EINVAL; + int ret; + + if (!pref_index) { + pr_debug("EPP pref_index is invalid\n"); + return -EINVAL; + } + + if (epp == -EINVAL) + epp = epp_values[pref_index]; + + if (epp > 0 && cpudata->policy == CPUFREQ_POLICY_PERFORMANCE) { + pr_debug("EPP cannot be set under performance policy\n"); + return -EBUSY; + } + + ret = amd_pstate_set_epp(cpudata, epp); + + return ret; +} + static inline int pstate_enable(bool enable) { return wrmsrl_safe(MSR_AMD_CPPC_ENABLE, enable); @@ -81,11 +191,21 @@ static inline int pstate_enable(bool enable) static int cppc_enable(bool enable) { int cpu, ret = 0; + struct cppc_perf_ctrls perf_ctrls; for_each_present_cpu(cpu) { ret = cppc_set_enable(cpu, enable); if (ret) return ret; + + /* Enable autonomous mode for EPP */ + if (cppc_state == AMD_PSTATE_ACTIVE) { + /* Set desired perf as zero to allow EPP firmware control */ + perf_ctrls.desired_perf = 0; + ret = cppc_set_perf(cpu, &perf_ctrls); + if (ret) + return ret; + } } return ret; @@ -428,7 +548,7 @@ static void amd_pstate_boost_init(struct amd_cpudata *cpudata) return; cpudata->boost_supported = true; - amd_pstate_driver.boost_enabled = true; + current_pstate_driver->boost_enabled = true; } static void amd_perf_ctl_reset(unsigned int cpu) @@ -602,10 +722,61 @@ static ssize_t show_amd_pstate_highest_perf(struct cpufreq_policy *policy, return sprintf(&buf[0], "%u\n", perf); } +static ssize_t show_energy_performance_available_preferences( + struct cpufreq_policy *policy, char *buf) +{ + int i = 0; + int offset = 0; + + while (energy_perf_strings[i] != NULL) + offset += sysfs_emit_at(buf, offset, "%s ", energy_perf_strings[i++]); + + sysfs_emit_at(buf, offset, "\n"); + + return offset; +} + +static ssize_t store_energy_performance_preference( + struct cpufreq_policy *policy, const char *buf, size_t count) +{ + struct amd_cpudata *cpudata = policy->driver_data; + char str_preference[21]; + ssize_t ret; + + ret = sscanf(buf, "%20s", str_preference); + if (ret != 1) + return -EINVAL; + + ret = match_string(energy_perf_strings, -1, str_preference); + if (ret < 0) + return -EINVAL; + + mutex_lock(&amd_pstate_limits_lock); + ret = amd_pstate_set_energy_pref_index(cpudata, ret); + mutex_unlock(&amd_pstate_limits_lock); + + return ret ?: count; +} + +static ssize_t show_energy_performance_preference( + struct cpufreq_policy *policy, char *buf) +{ + struct amd_cpudata *cpudata = policy->driver_data; + int preference; + + preference = amd_pstate_get_energy_pref_index(cpudata); + if (preference < 0) + return preference; + + return sysfs_emit(buf, "%s\n", energy_perf_strings[preference]); +} + cpufreq_freq_attr_ro(amd_pstate_max_freq); cpufreq_freq_attr_ro(amd_pstate_lowest_nonlinear_freq); cpufreq_freq_attr_ro(amd_pstate_highest_perf); +cpufreq_freq_attr_rw(energy_performance_preference); +cpufreq_freq_attr_ro(energy_performance_available_preferences); static struct freq_attr *amd_pstate_attr[] = { &amd_pstate_max_freq, @@ -614,6 +785,181 @@ static struct freq_attr *amd_pstate_attr[] = { NULL, }; +static struct freq_attr *amd_pstate_epp_attr[] = { + &amd_pstate_max_freq, + &amd_pstate_lowest_nonlinear_freq, + &amd_pstate_highest_perf, + &energy_performance_preference, + &energy_performance_available_preferences, + NULL, +}; + +static int amd_pstate_epp_cpu_init(struct cpufreq_policy *policy) +{ + int min_freq, max_freq, nominal_freq, lowest_nonlinear_freq, ret; + struct amd_cpudata *cpudata; + struct device *dev; + int rc; + u64 value; + + dev = get_cpu_device(policy->cpu); + if (!dev) + goto free_cpudata1; + + cpudata = kzalloc(sizeof(*cpudata), GFP_KERNEL); + if (!cpudata) + return -ENOMEM; + + cpudata->cpu = policy->cpu; + cpudata->epp_policy = 0; + + rc = amd_pstate_init_perf(cpudata); + if (rc) + goto free_cpudata1; + + min_freq = amd_get_min_freq(cpudata); + max_freq = amd_get_max_freq(cpudata); + nominal_freq = amd_get_nominal_freq(cpudata); + lowest_nonlinear_freq = amd_get_lowest_nonlinear_freq(cpudata); + if (min_freq < 0 || max_freq < 0 || min_freq > max_freq) { + dev_err(dev, "min_freq(%d) or max_freq(%d) value is incorrect\n", + min_freq, max_freq); + ret = -EINVAL; + goto free_cpudata1; + } + + policy->cpuinfo.min_freq = min_freq; + policy->cpuinfo.max_freq = max_freq; + /* It will be updated by governor */ + policy->cur = policy->cpuinfo.min_freq; + + /* Initial processor data capability frequencies */ + cpudata->max_freq = max_freq; + cpudata->min_freq = min_freq; + cpudata->nominal_freq = nominal_freq; + cpudata->lowest_nonlinear_freq = lowest_nonlinear_freq; + + policy->driver_data = cpudata; + + cpudata->epp_cached = amd_pstate_get_epp(cpudata, value); + + policy->min = policy->cpuinfo.min_freq; + policy->max = policy->cpuinfo.max_freq; + + /* + * Set the policy to powersave to provide a valid fallback value in case + * the default cpufreq governor is neither powersave nor performance. + */ + policy->policy = CPUFREQ_POLICY_POWERSAVE; + + if (boot_cpu_has(X86_FEATURE_CPPC)) { + policy->fast_switch_possible = true; + ret = rdmsrl_on_cpu(cpudata->cpu, MSR_AMD_CPPC_REQ, &value); + if (ret) + return ret; + WRITE_ONCE(cpudata->cppc_req_cached, value); + + ret = rdmsrl_on_cpu(cpudata->cpu, MSR_AMD_CPPC_CAP1, &value); + if (ret) + return ret; + WRITE_ONCE(cpudata->cppc_cap1_cached, value); + } + amd_pstate_boost_init(cpudata); + + return 0; + +free_cpudata1: + kfree(cpudata); + return ret; +} + +static int amd_pstate_epp_cpu_exit(struct cpufreq_policy *policy) +{ + pr_debug("CPU %d exiting\n", policy->cpu); + policy->fast_switch_possible = false; + return 0; +} + +static void amd_pstate_epp_init(unsigned int cpu) +{ + struct cpufreq_policy *policy = cpufreq_cpu_get(cpu); + struct amd_cpudata *cpudata = policy->driver_data; + u32 max_perf, min_perf; + u64 value; + s16 epp; + + max_perf = READ_ONCE(cpudata->highest_perf); + min_perf = READ_ONCE(cpudata->lowest_perf); + + value = READ_ONCE(cpudata->cppc_req_cached); + + if (cpudata->policy == CPUFREQ_POLICY_PERFORMANCE) + min_perf = max_perf; + + /* Initial min/max values for CPPC Performance Controls Register */ + value &= ~AMD_CPPC_MIN_PERF(~0L); + value |= AMD_CPPC_MIN_PERF(min_perf); + + value &= ~AMD_CPPC_MAX_PERF(~0L); + value |= AMD_CPPC_MAX_PERF(max_perf); + + /* CPPC EPP feature require to set zero to the desire perf bit */ + value &= ~AMD_CPPC_DES_PERF(~0L); + value |= AMD_CPPC_DES_PERF(0); + + if (cpudata->epp_policy == cpudata->policy) + goto skip_epp; + + cpudata->epp_policy = cpudata->policy; + + if (cpudata->policy == CPUFREQ_POLICY_PERFORMANCE) { + epp = amd_pstate_get_epp(cpudata, value); + if (epp < 0) + goto skip_epp; + /* force the epp value to be zero for performance policy */ + epp = 0; + } else { + /* Get BIOS pre-defined epp value */ + epp = amd_pstate_get_epp(cpudata, value); + if (epp) + goto skip_epp; + } + /* Set initial EPP value */ + if (boot_cpu_has(X86_FEATURE_CPPC)) { + value &= ~GENMASK_ULL(31, 24); + value |= (u64)epp << 24; + } + +skip_epp: + WRITE_ONCE(cpudata->cppc_req_cached, value); + amd_pstate_set_epp(cpudata, epp); + cpufreq_cpu_put(policy); +} + +static int amd_pstate_epp_set_policy(struct cpufreq_policy *policy) +{ + struct amd_cpudata *cpudata = policy->driver_data; + + if (!policy->cpuinfo.max_freq) + return -ENODEV; + + pr_debug("set_policy: cpuinfo.max %u policy->max %u\n", + policy->cpuinfo.max_freq, policy->max); + + cpudata->policy = policy->policy; + + amd_pstate_epp_init(policy->cpu); + + return 0; +} + +static int amd_pstate_epp_verify_policy(struct cpufreq_policy_data *policy) +{ + cpufreq_verify_within_cpu_limits(policy); + pr_debug("policy_max =%d, policy_min=%d\n", policy->max, policy->min); + return 0; +} + static struct cpufreq_driver amd_pstate_driver = { .flags = CPUFREQ_CONST_LOOPS | CPUFREQ_NEED_UPDATE_LIMITS, .verify = amd_pstate_verify, @@ -627,6 +973,16 @@ static struct cpufreq_driver amd_pstate_driver = { .attr = amd_pstate_attr, }; +static struct cpufreq_driver amd_pstate_epp_driver = { + .flags = CPUFREQ_CONST_LOOPS, + .verify = amd_pstate_epp_verify_policy, + .setpolicy = amd_pstate_epp_set_policy, + .init = amd_pstate_epp_cpu_init, + .exit = amd_pstate_epp_cpu_exit, + .name = "amd_pstate_epp", + .attr = amd_pstate_epp_attr, +}; + static int __init amd_pstate_init(void) { int ret; @@ -655,7 +1011,8 @@ static int __init amd_pstate_init(void) /* capability check */ if (boot_cpu_has(X86_FEATURE_CPPC)) { pr_debug("AMD CPPC MSR based functionality is supported\n"); - amd_pstate_driver.adjust_perf = amd_pstate_adjust_perf; + if (cppc_state == AMD_PSTATE_PASSIVE) + current_pstate_driver->adjust_perf = amd_pstate_adjust_perf; } else { pr_debug("AMD CPPC shared memory based functionality is supported\n"); static_call_update(amd_pstate_enable, cppc_enable); @@ -666,14 +1023,13 @@ static int __init amd_pstate_init(void) /* enable amd pstate feature */ ret = amd_pstate_enable(true); if (ret) { - pr_err("failed to enable amd-pstate with return %d\n", ret); + pr_err("failed to enable with return %d\n", ret); return ret; } - ret = cpufreq_register_driver(&amd_pstate_driver); + ret = cpufreq_register_driver(current_pstate_driver); if (ret) - pr_err("failed to register amd_pstate_driver with return %d\n", - ret); + pr_err("failed to register with return %d\n", ret); return ret; } @@ -695,6 +1051,12 @@ static int __init amd_pstate_param(char *str) if (cppc_state == AMD_PSTATE_DISABLE) pr_info("driver is explicitly disabled\n"); + if (cppc_state == AMD_PSTATE_ACTIVE) + current_pstate_driver = &amd_pstate_epp_driver; + + if (cppc_state == AMD_PSTATE_PASSIVE) + current_pstate_driver = &amd_pstate_driver; + return 0; } diff --git a/include/linux/amd-pstate.h b/include/linux/amd-pstate.h index dae2ce0f6735..8341a2a2948a 100644 --- a/include/linux/amd-pstate.h +++ b/include/linux/amd-pstate.h @@ -47,6 +47,10 @@ struct amd_aperf_mperf { * @prev: Last Aperf/Mperf/tsc count value read from register * @freq: current cpu frequency value * @boost_supported: check whether the Processor or SBIOS supports boost mode + * @epp_policy: Last saved policy used to set energy-performance preference + * @epp_cached: Cached CPPC energy-performance preference value + * @policy: Cpufreq policy value + * @cppc_cap1_cached Cached MSR_AMD_CPPC_CAP1 register value * * The amd_cpudata is key private data for each CPU thread in AMD P-State, and * represents all the attributes and goals that AMD P-State requests at runtime. @@ -72,6 +76,12 @@ struct amd_cpudata { u64 freq; bool boost_supported; + + /* EPP feature related attributes*/ + s16 epp_policy; + s16 epp_cached; + u32 policy; + u64 cppc_cap1_cached; }; /* From patchwork Fri Jan 6 06:14:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Yuan, Perry" X-Patchwork-Id: 39957 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:4e01:0:0:0:0:0 with SMTP id p1csp669100wrt; Thu, 5 Jan 2023 22:17:41 -0800 (PST) X-Google-Smtp-Source: AMrXdXtIJFx5NF2aJG91iVmqBl7SCYcXGa/1onWCYUOZNX5iFHr26Dx1yP65mQO5yYXVYP6OqnjX X-Received: by 2002:a05:6402:2a04:b0:463:9193:404a with SMTP id ey4-20020a0564022a0400b004639193404amr51898029edb.21.1672985861145; Thu, 05 Jan 2023 22:17:41 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1672985861; cv=pass; d=google.com; s=arc-20160816; b=dZMsrkQEDx559AnvaVdodi3Ocr1a3t6Ahv7Z9L9Ez0RhTv7qAMl8Mm9aRS96Isa2g3 BOkOzLD/8vzWeq7H37pClqMao9JttOS63sDCYkcRcv6TUaSoJm1TBj1/NjEq27RfYue9 6imdX+wfSgLVkGUzU0XUlK2iZtxjBK9xlGByiBg9U7gogptOd3k23R9Di6ZvWzSAMneg pSRkI7tA/2IqiBKAqmfV558/tEJm0e/yLehtXbuWuOGFOUWRXMj3uMW3zZvKmDdgfh+0 4eGWwkA0Eu+FIqG2+cviLgB6IXjkTVTbKVCAwl2IcTumsRtfh2ffpq+X1EI24Xcm29j7 ij1A== ARC-Message-Signature: i=2; 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Fri, 6 Jan 2023 00:14:57 -0600 From: Perry Yuan To: , , , CC: , , , , , , , , Subject: [PATCH v10 06/12] cpufreq: amd-pstate: implement amd pstate cpu online and offline callback Date: Fri, 6 Jan 2023 14:14:14 +0800 Message-ID: <20230106061420.95715-7-perry.yuan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230106061420.95715-1-perry.yuan@amd.com> References: <20230106061420.95715-1-perry.yuan@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: DS1PEPF0000E631:EE_|DM6PR12MB4075:EE_ X-MS-Office365-Filtering-Correlation-Id: 1156ae9c-3a90-4f41-4f54-08daefad6cd7 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:(13230022)(4636009)(396003)(136003)(39860400002)(346002)(376002)(451199015)(36840700001)(46966006)(40470700004)(81166007)(82740400003)(356005)(40480700001)(82310400005)(316002)(86362001)(40460700003)(36756003)(54906003)(1076003)(110136005)(2616005)(7696005)(478600001)(6666004)(16526019)(26005)(186003)(5660300002)(44832011)(83380400001)(2906002)(36860700001)(8676002)(70586007)(4326008)(70206006)(41300700001)(8936002)(336012)(47076005)(426003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Jan 2023 06:15:35.9995 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1156ae9c-3a90-4f41-4f54-08daefad6cd7 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: DS1PEPF0000E631.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4075 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1754252822659875260?= X-GMAIL-MSGID: =?utf-8?q?1754252822659875260?= From: Perry Yuan Adds online and offline driver callback support to allow cpu cores go offline and help to restore the previous working states when core goes back online later for EPP driver mode. Acked-by: Huang Rui Reviewed-by: Mario Limonciello Signed-off-by: Perry Yuan --- drivers/cpufreq/amd-pstate.c | 82 ++++++++++++++++++++++++++++++++++++ include/linux/amd-pstate.h | 1 + 2 files changed, 83 insertions(+) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 9a92c71af80f..ae6d2bf18e16 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -953,6 +953,86 @@ static int amd_pstate_epp_set_policy(struct cpufreq_policy *policy) return 0; } +static void amd_pstate_epp_reenable(struct amd_cpudata *cpudata) +{ + struct cppc_perf_ctrls perf_ctrls; + u64 value, max_perf; + int ret; + + ret = amd_pstate_enable(true); + if (ret) + pr_err("failed to enable amd pstate during resume, return %d\n", ret); + + value = READ_ONCE(cpudata->cppc_req_cached); + max_perf = READ_ONCE(cpudata->highest_perf); + + if (boot_cpu_has(X86_FEATURE_CPPC)) { + wrmsrl_on_cpu(cpudata->cpu, MSR_AMD_CPPC_REQ, value); + } else { + perf_ctrls.max_perf = max_perf; + perf_ctrls.energy_perf = AMD_CPPC_ENERGY_PERF_PREF(cpudata->epp_cached); + cppc_set_perf(cpudata->cpu, &perf_ctrls); + } +} + +static int amd_pstate_epp_cpu_online(struct cpufreq_policy *policy) +{ + struct amd_cpudata *cpudata = policy->driver_data; + + pr_debug("AMD CPU Core %d going online\n", cpudata->cpu); + + if (cppc_state == AMD_PSTATE_ACTIVE) { + amd_pstate_epp_reenable(cpudata); + cpudata->suspended = false; + } + + return 0; +} + +static void amd_pstate_epp_offline(struct cpufreq_policy *policy) +{ + struct amd_cpudata *cpudata = policy->driver_data; + struct cppc_perf_ctrls perf_ctrls; + int min_perf; + u64 value; + + min_perf = READ_ONCE(cpudata->lowest_perf); + value = READ_ONCE(cpudata->cppc_req_cached); + + mutex_lock(&amd_pstate_limits_lock); + if (boot_cpu_has(X86_FEATURE_CPPC)) { + cpudata->epp_policy = CPUFREQ_POLICY_UNKNOWN; + + /* Set max perf same as min perf */ + value &= ~AMD_CPPC_MAX_PERF(~0L); + value |= AMD_CPPC_MAX_PERF(min_perf); + value &= ~AMD_CPPC_MIN_PERF(~0L); + value |= AMD_CPPC_MIN_PERF(min_perf); + wrmsrl_on_cpu(cpudata->cpu, MSR_AMD_CPPC_REQ, value); + } else { + perf_ctrls.desired_perf = 0; + perf_ctrls.max_perf = min_perf; + perf_ctrls.energy_perf = AMD_CPPC_ENERGY_PERF_PREF(HWP_EPP_BALANCE_POWERSAVE); + cppc_set_perf(cpudata->cpu, &perf_ctrls); + } + mutex_unlock(&amd_pstate_limits_lock); +} + +static int amd_pstate_epp_cpu_offline(struct cpufreq_policy *policy) +{ + struct amd_cpudata *cpudata = policy->driver_data; + + pr_debug("AMD CPU Core %d going offline\n", cpudata->cpu); + + if (cpudata->suspended) + return 0; + + if (cppc_state == AMD_PSTATE_ACTIVE) + amd_pstate_epp_offline(policy); + + return 0; +} + static int amd_pstate_epp_verify_policy(struct cpufreq_policy_data *policy) { cpufreq_verify_within_cpu_limits(policy); @@ -979,6 +1059,8 @@ static struct cpufreq_driver amd_pstate_epp_driver = { .setpolicy = amd_pstate_epp_set_policy, .init = amd_pstate_epp_cpu_init, .exit = amd_pstate_epp_cpu_exit, + .offline = amd_pstate_epp_cpu_offline, + .online = amd_pstate_epp_cpu_online, .name = "amd_pstate_epp", .attr = amd_pstate_epp_attr, }; diff --git a/include/linux/amd-pstate.h b/include/linux/amd-pstate.h index 8341a2a2948a..15761a581e82 100644 --- a/include/linux/amd-pstate.h +++ b/include/linux/amd-pstate.h @@ -82,6 +82,7 @@ struct amd_cpudata { s16 epp_cached; u32 policy; u64 cppc_cap1_cached; + bool suspended; }; /* From patchwork Fri Jan 6 06:14:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Yuan, Perry" X-Patchwork-Id: 39956 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:4e01:0:0:0:0:0 with SMTP id p1csp669082wrt; Thu, 5 Jan 2023 22:17:38 -0800 (PST) X-Google-Smtp-Source: AMrXdXsfO0dCMoJM1Hmau1c/IuSMUcyy0DZsjEG9iWgOHzO8tDW+VLV1gBlkkRDyl/RAdDFi1OSn X-Received: by 2002:a17:906:fcdc:b0:84d:207d:c00f with SMTP id qx28-20020a170906fcdc00b0084d207dc00fmr382011ejb.36.1672985858076; Thu, 05 Jan 2023 22:17:38 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1672985858; cv=pass; d=google.com; s=arc-20160816; b=YE00fOotJvAvgfQj6LW5gKMvuxpR6YyBhQ+Q47WORm7qw4kzjzr8v6tIjDnzuTdGAv kWyiKnWBXeXWZKhYylFbUhPzwEIq0STL02eTixEO/ZEUThndRvlkkISCeOx6BZ95rq5N 3cPdHF9YFMgLPtXC+jG9l7tVgv2hDsclSHZg/swUTfkVSb0PszGCfUVjDGl8spxOlnzF qELkWt7bUihJusMDg53SSVU7YpphTT92eDNWu1OQ69VmaIds3vIckwoeGfcAuRoYvRic k++BhBSiyyXdTAfS4HEH3B0BUYQlya0IRIhQZ5hAaxe2Bxpdrifxacsu9iikeYeBQXhv RFJw== ARC-Message-Signature: i=2; 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Fri, 6 Jan 2023 00:15:33 -0600 From: Perry Yuan To: , , , CC: , , , , , , , , Subject: [PATCH v10 07/12] cpufreq: amd-pstate: implement suspend and resume callbacks Date: Fri, 6 Jan 2023 14:14:15 +0800 Message-ID: <20230106061420.95715-8-perry.yuan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230106061420.95715-1-perry.yuan@amd.com> References: <20230106061420.95715-1-perry.yuan@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: DS1PEPF0000E631:EE_|DM6PR12MB4330:EE_ X-MS-Office365-Filtering-Correlation-Id: d1b0c2c2-61c1-4187-fb16-08daefad6d44 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:(13230022)(4636009)(396003)(346002)(136003)(39860400002)(376002)(451199015)(36840700001)(40470700004)(46966006)(2616005)(83380400001)(1076003)(336012)(47076005)(40460700003)(426003)(36860700001)(86362001)(40480700001)(82310400005)(82740400003)(356005)(36756003)(316002)(81166007)(8936002)(15650500001)(70206006)(6666004)(16526019)(54906003)(4326008)(7696005)(70586007)(5660300002)(110136005)(8676002)(44832011)(2906002)(41300700001)(186003)(26005)(478600001)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Jan 2023 06:15:36.7183 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d1b0c2c2-61c1-4187-fb16-08daefad6d44 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: DS1PEPF0000E631.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4330 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1754252819293932103?= X-GMAIL-MSGID: =?utf-8?q?1754252819293932103?= From: Perry Yuan add suspend and resume support for the AMD processors by amd_pstate_epp driver instance. When the CPPC is suspended, EPP driver will set EPP profile to 'power' profile and set max/min perf to lowest perf value. When resume happens, it will restore the MSR registers with previous cached value. Acked-by: Huang Rui Reviewed-by: Mario Limonciello Signed-off-by: Perry Yuan --- drivers/cpufreq/amd-pstate.c | 40 ++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index ae6d2bf18e16..2c8b126cec5a 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -1040,6 +1040,44 @@ static int amd_pstate_epp_verify_policy(struct cpufreq_policy_data *policy) return 0; } +static int amd_pstate_epp_suspend(struct cpufreq_policy *policy) +{ + struct amd_cpudata *cpudata = policy->driver_data; + int ret; + + /* avoid suspending when EPP is not enabled */ + if (cppc_state != AMD_PSTATE_ACTIVE) + return 0; + + /* set this flag to avoid setting core offline*/ + cpudata->suspended = true; + + /* disable CPPC in lowlevel firmware */ + ret = amd_pstate_enable(false); + if (ret) + pr_err("failed to suspend, return %d\n", ret); + + return 0; +} + +static int amd_pstate_epp_resume(struct cpufreq_policy *policy) +{ + struct amd_cpudata *cpudata = policy->driver_data; + + if (cpudata->suspended) { + mutex_lock(&amd_pstate_limits_lock); + + /* enable amd pstate from suspend state*/ + amd_pstate_epp_reenable(cpudata); + + mutex_unlock(&amd_pstate_limits_lock); + + cpudata->suspended = false; + } + + return 0; +} + static struct cpufreq_driver amd_pstate_driver = { .flags = CPUFREQ_CONST_LOOPS | CPUFREQ_NEED_UPDATE_LIMITS, .verify = amd_pstate_verify, @@ -1061,6 +1099,8 @@ static struct cpufreq_driver amd_pstate_epp_driver = { .exit = amd_pstate_epp_cpu_exit, .offline = amd_pstate_epp_cpu_offline, .online = amd_pstate_epp_cpu_online, + .suspend = amd_pstate_epp_suspend, + .resume = amd_pstate_epp_resume, .name = "amd_pstate_epp", .attr = amd_pstate_epp_attr, }; From patchwork Fri Jan 6 06:14:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Yuan, Perry" X-Patchwork-Id: 39961 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:4e01:0:0:0:0:0 with SMTP id p1csp669613wrt; Thu, 5 Jan 2023 22:19:19 -0800 (PST) X-Google-Smtp-Source: AMrXdXsFvYJ60dJGJ7abdJt/IPfejX+FMexsIuAVSGJVjspgZAfcbx/6QroX36GtgOiJPXGQZRVv X-Received: by 2002:a05:6402:450a:b0:491:ac3e:41b5 with SMTP id ez10-20020a056402450a00b00491ac3e41b5mr4817466edb.33.1672985959480; Thu, 05 Jan 2023 22:19:19 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1672985959; cv=pass; d=google.com; s=arc-20160816; b=JnNxzv/xRZRJma2d9cPhk/1vutG1B7gf4j9ilFIF/lIgcSnvtvE6ZZQ231Iq9q9OZl zdVH3/V62xOvG/+dDI7czSYnrFoPm7n+mzoyewKcrJomVt8JjcwdfeTvjA2mIZ8Tiy2Z WsNsMHIDVqonjxo4VqRj3rlu1IwjtQLkBbqYZwkPu5Ggssumk8RLtmhrJZILf6iRYC3n lASXDCW3eD3wUF9tq0azd5bd0dhLRJEFEHipMQheRzsoJMq/6qDV1gkSg3ebDk0aaAbp cRgNA/9rxN7JiUdnxP2Cpz4G9AouTiL4iShlk2O4qqoNz8Ok0/50/3w8EYIyW3bAykxw jwNA== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=QXuMlKZVbEOxFGnVLZv8F2ZmQwVfBTRRHqvG1ikrJVE=; b=eTzLcEwdSl8oXZPpSv77LEdhYakTgordlhVxREUcVU/DVyPkzG0/sE3PgdtpaaiZoX 4nKeaiukSKoxi3YvD+HaZVVGoJygupeoi3Gw08neDR7VM83+zAwUNFxdm0CAWSo+ORfF F0Fh9GZwHM88jWgRo3rjcWelBjbykrxaSyKsTBoIzRc02A3s6Lswd8DOBiGs8oczgB7c Uv94y44Q3Z8vM+0odXIahgRk/TkFf4za80lBybj5aOGppbuYvtq4H3XC+F5bc4CflKjq qi56Tx+gbCjV2CEcKKaHIz6XjcSzdWSt6O8gIo1e0pAVoq/wPcAsXLRwZAb4wNq6AqDb pVRg== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@amd.com header.s=selector1 header.b="2qrkZC3/"; arc=pass (i=1 spf=pass spfdomain=amd.com dmarc=pass fromdomain=amd.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amd.com Received: from out1.vger.email (out1.vger.email. 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Fri, 6 Jan 2023 00:15:36 -0600 From: Perry Yuan To: , , , CC: , , , , , , , , Subject: [PATCH v10 08/12] cpufreq: amd-pstate: add driver working mode switch support Date: Fri, 6 Jan 2023 14:14:16 +0800 Message-ID: <20230106061420.95715-9-perry.yuan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230106061420.95715-1-perry.yuan@amd.com> References: <20230106061420.95715-1-perry.yuan@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: CY4PEPF0000C968:EE_|DM4PR12MB5937:EE_ X-MS-Office365-Filtering-Correlation-Id: 1a7e40ac-133d-4f28-b3d0-08daefad705d 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:(13230022)(4636009)(39860400002)(346002)(376002)(136003)(396003)(451199015)(46966006)(36840700001)(40470700004)(44832011)(70586007)(5660300002)(54906003)(8676002)(70206006)(316002)(2906002)(41300700001)(4326008)(8936002)(478600001)(36756003)(36860700001)(82310400005)(7696005)(110136005)(6666004)(426003)(2616005)(81166007)(186003)(47076005)(16526019)(1076003)(83380400001)(336012)(86362001)(356005)(40480700001)(40460700003)(82740400003)(26005)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Jan 2023 06:15:41.8822 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1a7e40ac-133d-4f28-b3d0-08daefad705d 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: CY4PEPF0000C968.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB5937 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1754252925619723717?= X-GMAIL-MSGID: =?utf-8?q?1754252925619723717?= From: Perry Yuan While amd-pstate driver was loaded with specific driver mode, it will need to check which mode is enabled for the pstate driver,add this sysfs entry to show the current status $ cat /sys/devices/system/cpu/amd-pstate/status active Meanwhile, user can switch the pstate driver mode with writing mode string to sysfs entry as below. Enable passive mode: $ sudo bash -c "echo passive > /sys/devices/system/cpu/amd-pstate/status" Enable active mode (EPP driver mode): $ sudo bash -c "echo active > /sys/devices/system/cpu/amd-pstate/status" Reviewed-by: Mario Limonciello Signed-off-by: Perry Yuan Reviewed-by: Wyes Karny --- drivers/cpufreq/amd-pstate.c | 118 +++++++++++++++++++++++++++++++++++ 1 file changed, 118 insertions(+) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 2c8b126cec5a..d3f4cdd803f3 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -63,6 +63,7 @@ static struct cpufreq_driver *current_pstate_driver; static struct cpufreq_driver amd_pstate_driver; static struct cpufreq_driver amd_pstate_epp_driver; static int cppc_state = AMD_PSTATE_DISABLE; +struct kobject *amd_pstate_kobj; static inline int get_mode_idx_from_str(const char *str, size_t size) { @@ -631,6 +632,8 @@ static int amd_pstate_cpu_init(struct cpufreq_policy *policy) policy->driver_data = cpudata; amd_pstate_boost_init(cpudata); + if (!current_pstate_driver->adjust_perf) + current_pstate_driver->adjust_perf = amd_pstate_adjust_perf; return 0; @@ -771,12 +774,99 @@ static ssize_t show_energy_performance_preference( return sysfs_emit(buf, "%s\n", energy_perf_strings[preference]); } +static ssize_t amd_pstate_show_status(char *buf) +{ + if (!current_pstate_driver) + return sysfs_emit(buf, "disable\n"); + + return sysfs_emit(buf, "%s\n", amd_pstate_mode_string[cppc_state]); +} + +static void amd_pstate_driver_cleanup(void) +{ + current_pstate_driver = NULL; +} + +static int amd_pstate_update_status(const char *buf, size_t size) +{ + int ret; + int mode_idx; + + if (size > 7 || size < 6) + return -EINVAL; + mode_idx = get_mode_idx_from_str(buf, size); + + switch(mode_idx) { + case AMD_PSTATE_DISABLE: + if (!current_pstate_driver) + return -EINVAL; + if (cppc_state == AMD_PSTATE_ACTIVE) + return -EBUSY; + ret = cpufreq_unregister_driver(current_pstate_driver); + amd_pstate_driver_cleanup(); + break; + case AMD_PSTATE_PASSIVE: + if (current_pstate_driver) { + if (current_pstate_driver == &amd_pstate_driver) + return 0; + cpufreq_unregister_driver(current_pstate_driver); + cppc_state = AMD_PSTATE_PASSIVE; + current_pstate_driver = &amd_pstate_driver; + } + + ret = cpufreq_register_driver(current_pstate_driver); + break; + case AMD_PSTATE_ACTIVE: + if (current_pstate_driver) { + if (current_pstate_driver == &amd_pstate_epp_driver) + return 0; + cpufreq_unregister_driver(current_pstate_driver); + current_pstate_driver = &amd_pstate_epp_driver; + cppc_state = AMD_PSTATE_ACTIVE; + } + + ret = cpufreq_register_driver(current_pstate_driver); + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static ssize_t show_status(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + ssize_t ret; + + mutex_lock(&amd_pstate_driver_lock); + ret = amd_pstate_show_status(buf); + mutex_unlock(&amd_pstate_driver_lock); + + return ret; +} + +static ssize_t store_status(struct kobject *a, struct kobj_attribute *b, + const char *buf, size_t count) +{ + char *p = memchr(buf, '\n', count); + int ret; + + mutex_lock(&amd_pstate_driver_lock); + ret = amd_pstate_update_status(buf, p ? p - buf : count); + mutex_unlock(&amd_pstate_driver_lock); + + return ret < 0 ? ret : count; +} + cpufreq_freq_attr_ro(amd_pstate_max_freq); cpufreq_freq_attr_ro(amd_pstate_lowest_nonlinear_freq); cpufreq_freq_attr_ro(amd_pstate_highest_perf); cpufreq_freq_attr_rw(energy_performance_preference); cpufreq_freq_attr_ro(energy_performance_available_preferences); +define_one_global_rw(status); static struct freq_attr *amd_pstate_attr[] = { &amd_pstate_max_freq, @@ -794,6 +884,15 @@ static struct freq_attr *amd_pstate_epp_attr[] = { NULL, }; +static struct attribute *pstate_global_attributes[] = { + &status.attr, + NULL +}; + +static const struct attribute_group amd_pstate_global_attr_group = { + .attrs = pstate_global_attributes, +}; + static int amd_pstate_epp_cpu_init(struct cpufreq_policy *policy) { int min_freq, max_freq, nominal_freq, lowest_nonlinear_freq, ret; @@ -1153,6 +1252,25 @@ static int __init amd_pstate_init(void) if (ret) pr_err("failed to register with return %d\n", ret); + amd_pstate_kobj = kobject_create_and_add("amd_pstate", &cpu_subsys.dev_root->kobj); + if (!amd_pstate_kobj) { + ret = -EINVAL; + pr_err("global sysfs registration failed.\n"); + goto kobject_free; + } + + ret = sysfs_create_group(amd_pstate_kobj, &amd_pstate_global_attr_group); + if (ret) { + pr_err("sysfs attribute export failed with error %d.\n", ret); + goto global_attr_free; + } + + return ret; + +global_attr_free: + kobject_put(amd_pstate_kobj); +kobject_free: + cpufreq_unregister_driver(current_pstate_driver); return ret; } device_initcall(amd_pstate_init); From patchwork Fri Jan 6 06:14:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Yuan, Perry" X-Patchwork-Id: 39958 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:4e01:0:0:0:0:0 with SMTP id p1csp669152wrt; Thu, 5 Jan 2023 22:17:51 -0800 (PST) X-Google-Smtp-Source: AMrXdXuR2zrMCcJbwkWDveMh/QCD/BXjK2Cpir1s4+6bzesyuO8vKjZLKZdwb+Hl93Fb+wgw7gMe X-Received: by 2002:a17:906:ccc7:b0:7c4:a773:4d72 with SMTP id ot7-20020a170906ccc700b007c4a7734d72mr48359073ejb.64.1672985870901; Thu, 05 Jan 2023 22:17:50 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1672985870; cv=pass; d=google.com; s=arc-20160816; b=F0j/a3h/WkrIMlWD6MbVBE07xIJscrAcbNFRkyDX0XYS9bV/oUARdd8jWRs3tU44gw pDJP4diMIv9GIozyx0YB4VWNd2pDWQCAGQ0z2l5SPWzn9MMLdlspUysHGb1nhwsAUByd DmgotP1CAjj8lEgaoSVfHtEPW32DT+dmLYSVX4kq+p60TjJwW9qu24D+RHVSRabwEe/i r4hp8gMbbUnhrYZUWxRPNGIA4Ghgwc6VS8kF3D2B6y5Sqsi10eKQ3WZHfHiGNNWzxK9f gQ5c4XQHf/E+0DvnoVvyUwbli8Q+JtZzVi6ig9Zp8zBpDpwjtBGA9Fki4JOP1L399inz aqEQ== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=iII+df8dnkVuEFvhtq5qZL88U36fP4G+zC7Ke47Rcp0=; b=aktoYt9ZLhmYhs/q41EBUT0QXCeWtTDFkXuEgKZ4PrxFUrlfm0hhwiJdrzd2B0fcfD h10LcKf1+aSv+91MPOdE8LpjW+bg0hfZxyEK0flqvkJLvwwF+/7W2UmUlIkbArqyn6S/ 9Y5jFkU6r169GUIRq9P00amPtDbgn/uwvfsOBOiCdgpPYIPT2QqXAhPz8GPEwundKSIm scd9Ru1CgwWCm3cM6kOjz3gDQuSD+sytW/EfZV1Pt3rLk/5JIv7NvjAYe3v1om8p2cyF bXNdLVgDbizjoduJVzPYPuZlqllBL5dHXcfb7eMV3Kb+8Xf1dGXDzHj/7pFqhyKTMeh8 uOSg== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@amd.com header.s=selector1 header.b=K1zDd6hb; arc=pass (i=1 spf=pass spfdomain=amd.com dmarc=pass fromdomain=amd.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amd.com Received: from out1.vger.email (out1.vger.email. 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Fri, 6 Jan 2023 00:15:40 -0600 From: Perry Yuan To: , , , CC: , , , , , , , , Subject: [PATCH v10 09/12] Documentation: amd-pstate: add amd pstate driver mode introduction Date: Fri, 6 Jan 2023 14:14:17 +0800 Message-ID: <20230106061420.95715-10-perry.yuan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230106061420.95715-1-perry.yuan@amd.com> References: <20230106061420.95715-1-perry.yuan@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: DS1PEPF0000E635:EE_|CY5PR12MB6624:EE_ X-MS-Office365-Filtering-Correlation-Id: d868b0f1-d82b-4e22-a66c-08daefad71d8 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:(13230022)(4636009)(39860400002)(346002)(376002)(396003)(136003)(451199015)(46966006)(36840700001)(40470700004)(70586007)(316002)(44832011)(5660300002)(2906002)(41300700001)(54906003)(8676002)(8936002)(4326008)(70206006)(83380400001)(36860700001)(110136005)(82310400005)(478600001)(36756003)(6666004)(336012)(26005)(186003)(1076003)(426003)(16526019)(47076005)(2616005)(81166007)(40480700001)(7696005)(82740400003)(86362001)(40460700003)(356005)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Jan 2023 06:15:44.3969 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d868b0f1-d82b-4e22-a66c-08daefad71d8 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: DS1PEPF0000E635.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY5PR12MB6624 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1754252832530812527?= X-GMAIL-MSGID: =?utf-8?q?1754252832530812527?= From: Perry Yuan The amd-pstate driver has two operation modes supported: * CPPC Autonomous (active) mode * CPPC non-autonomous (passive) mode. active mode and passive mode can be chosen by different kernel parameters. Reviewed-by: Mario Limonciello Signed-off-by: Perry Yuan --- Documentation/admin-guide/pm/amd-pstate.rst | 26 +++++++++++++++++++-- 1 file changed, 24 insertions(+), 2 deletions(-) diff --git a/Documentation/admin-guide/pm/amd-pstate.rst b/Documentation/admin-guide/pm/amd-pstate.rst index 33ab8ec8fc2f..62744dae3c5f 100644 --- a/Documentation/admin-guide/pm/amd-pstate.rst +++ b/Documentation/admin-guide/pm/amd-pstate.rst @@ -299,8 +299,30 @@ module which supports the new AMD P-States mechanism on most of the future AMD platforms. The AMD P-States mechanism is the more performance and energy efficiency frequency management method on AMD processors. -Kernel Module Options for ``amd-pstate`` -========================================= + +AMD Pstate Driver Operation Modes +================================= + +``amd_pstate`` CPPC has two operation modes: CPPC Autonomous(active) mode and +CPPC non-autonomous(passive) mode. +active mode and passive mode can be chosen by different kernel parameters. +When in Autonomous mode, CPPC ignores requests done in the Desired Performance +Target register and takes into account only the values set to the Minimum requested +performance, Maximum requested performance, and Energy Performance Preference +registers. When Autonomous is disabled, it only considers the Desired Performance Target. + +Active Mode +------------ + +``amd_pstate=active`` + +This is the low-level firmware control mode which is implemented by ``amd_pstate_epp`` +driver with ``amd_pstate=active`` passed to the kernel in the command line. +In this mode, ``amd_pstate_epp`` driver provides a hint to the hardware if software +wants to bias toward performance (0x0) or energy efficiency (0xff) to the CPPC firmware. +then CPPC power algorithm will calculate the runtime workload and adjust the realtime +cores frequency according to the power supply and thermal, core voltage and some other +hardware conditions. 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Fri, 6 Jan 2023 00:15:44 -0600 From: Perry Yuan To: , , , CC: , , , , , , , , Subject: [PATCH v10 10/12] Documentation: introduce amd pstate active mode kernel command line options Date: Fri, 6 Jan 2023 14:14:18 +0800 Message-ID: <20230106061420.95715-11-perry.yuan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230106061420.95715-1-perry.yuan@amd.com> References: <20230106061420.95715-1-perry.yuan@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: DS1PEPF0000E633:EE_|MN0PR12MB6054:EE_ X-MS-Office365-Filtering-Correlation-Id: d990c032-4419-499a-da54-08daefad88f7 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:(13230022)(4636009)(346002)(396003)(39860400002)(136003)(376002)(451199015)(36840700001)(40470700004)(46966006)(6666004)(70206006)(26005)(1076003)(54906003)(70586007)(2616005)(110136005)(186003)(16526019)(4326008)(8936002)(426003)(5660300002)(47076005)(83380400001)(41300700001)(8676002)(44832011)(2906002)(478600001)(336012)(36860700001)(316002)(356005)(81166007)(40480700001)(7696005)(40460700003)(36756003)(86362001)(82740400003)(82310400005)(36900700001);DIR:OUT;SFP:1101; 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In autonomous mode SMU firmware decides frequencies at runtime based on workload utilization, usage in other IPs, infrastructure limits such as power, thermals and so on. Reviewed-by: Mario Limonciello Signed-off-by: Perry Yuan --- Documentation/admin-guide/kernel-parameters.txt | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 42af9ca0127e..73a02816f6f8 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -6970,3 +6970,10 @@ management firmware translates the requests into actual hardware states (core frequency, data fabric and memory clocks etc.) + active + Use amd_pstate_epp driver instance as the scaling driver, + driver provides a hint to the hardware if software wants + to bias toward performance (0x0) or energy efficiency (0xff) + to the CPPC firmware. then CPPC power algorithm will + calculate the runtime workload and adjust the realtime cores + frequency. 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Fri, 6 Jan 2023 00:16:21 -0600 From: Perry Yuan To: , , , CC: , , , , , , , , Subject: [PATCH v10 11/12] cpufreq: amd-pstate: convert sprintf with sysfs_emit() Date: Fri, 6 Jan 2023 14:14:19 +0800 Message-ID: <20230106061420.95715-12-perry.yuan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230106061420.95715-1-perry.yuan@amd.com> References: <20230106061420.95715-1-perry.yuan@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: DS1PEPF0000E633:EE_|SJ0PR12MB5453:EE_ X-MS-Office365-Filtering-Correlation-Id: 97d27626-a396-439e-9bf0-08daefad8ae0 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:(13230022)(4636009)(136003)(376002)(39860400002)(396003)(346002)(451199015)(46966006)(36840700001)(40470700004)(44832011)(41300700001)(70206006)(8676002)(4326008)(54906003)(110136005)(2906002)(70586007)(8936002)(316002)(7696005)(478600001)(186003)(26005)(5660300002)(16526019)(2616005)(86362001)(40480700001)(426003)(83380400001)(1076003)(336012)(47076005)(36860700001)(82740400003)(356005)(36756003)(40460700003)(81166007)(82310400005)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Jan 2023 06:16:26.3921 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 97d27626-a396-439e-9bf0-08daefad8ae0 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: DS1PEPF0000E633.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB5453 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1754252947619997797?= X-GMAIL-MSGID: =?utf-8?q?1754252947619997797?= replace the sprintf with a more generic sysfs_emit function No intended potential function impact Acked-by: Huang Rui Reviewed-by: Mario Limonciello Signed-off-by: Perry Yuan --- drivers/cpufreq/amd-pstate.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index d3f4cdd803f3..ea4a4a0c80be 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -694,7 +694,7 @@ static ssize_t show_amd_pstate_max_freq(struct cpufreq_policy *policy, if (max_freq < 0) return max_freq; - return sprintf(&buf[0], "%u\n", max_freq); + return sysfs_emit(buf, "%u\n", max_freq); } static ssize_t show_amd_pstate_lowest_nonlinear_freq(struct cpufreq_policy *policy, @@ -707,7 +707,7 @@ static ssize_t show_amd_pstate_lowest_nonlinear_freq(struct cpufreq_policy *poli if (freq < 0) return freq; - return sprintf(&buf[0], "%u\n", freq); + return sysfs_emit(buf, "%u\n", freq); } /* @@ -722,7 +722,7 @@ static ssize_t show_amd_pstate_highest_perf(struct cpufreq_policy *policy, perf = READ_ONCE(cpudata->highest_perf); - return sprintf(&buf[0], "%u\n", perf); + return sysfs_emit(buf, "%u\n", perf); } static ssize_t show_energy_performance_available_preferences( From patchwork Fri Jan 6 06:14:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Yuan, Perry" X-Patchwork-Id: 39963 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:4e01:0:0:0:0:0 with SMTP id p1csp669739wrt; Thu, 5 Jan 2023 22:19:42 -0800 (PST) X-Google-Smtp-Source: AMrXdXvdjjDSCbn6byN3A4KEqyeo3oQTfFIKE5/2jalP4gvarQRhY7OMRUUnmW9Us+g67eXF5ibZ X-Received: by 2002:a05:6a20:d68f:b0:a2:edab:aa73 with SMTP id it15-20020a056a20d68f00b000a2edabaa73mr4627514pzb.25.1672985982294; 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Fri, 6 Jan 2023 00:16:26 -0600 From: Perry Yuan To: , , , CC: , , , , , , , , Subject: [PATCH v10 12/12] Documentation: amd-pstate: introduce new global sysfs attributes Date: Fri, 6 Jan 2023 14:14:20 +0800 Message-ID: <20230106061420.95715-13-perry.yuan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230106061420.95715-1-perry.yuan@amd.com> References: <20230106061420.95715-1-perry.yuan@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: DS1PEPF0000E633:EE_|BL1PR12MB5095:EE_ X-MS-Office365-Filtering-Correlation-Id: f5f1812f-9c07-463f-68ea-08daefad8d77 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:(13230022)(4636009)(136003)(396003)(39860400002)(346002)(376002)(451199015)(40470700004)(36840700001)(46966006)(5660300002)(4326008)(316002)(41300700001)(70586007)(8676002)(8936002)(54906003)(110136005)(44832011)(2906002)(6666004)(7696005)(26005)(478600001)(186003)(16526019)(70206006)(40480700001)(86362001)(36860700001)(83380400001)(1076003)(2616005)(336012)(47076005)(426003)(82740400003)(81166007)(36756003)(356005)(40460700003)(82310400005)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Jan 2023 06:16:30.7359 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f5f1812f-9c07-463f-68ea-08daefad8d77 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: DS1PEPF0000E633.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR12MB5095 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1754252949239964715?= X-GMAIL-MSGID: =?utf-8?q?1754252949239964715?= The amd-pstate driver supports switching working modes at runtime. Users can view and change modes by interacting with the "status" sysfs attribute. 1) check driver mode: $ cat /sys/devices/system/cpu/amd-pstate/status 2) switch mode: `# echo "passive" | sudo tee /sys/devices/system/cpu/amd-pstate/status` or `# echo "active" | sudo tee /sys/devices/system/cpu/amd-pstate/status` Reviewed-by: Mario Limonciello Signed-off-by: Perry Yuan --- Documentation/admin-guide/pm/amd-pstate.rst | 29 +++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/Documentation/admin-guide/pm/amd-pstate.rst b/Documentation/admin-guide/pm/amd-pstate.rst index 62744dae3c5f..df0637a49f47 100644 --- a/Documentation/admin-guide/pm/amd-pstate.rst +++ b/Documentation/admin-guide/pm/amd-pstate.rst @@ -339,6 +339,35 @@ processor must provide at least nominal performance requested and go higher if c operating conditions allow. +User Space Interface in ``sysfs`` +================================= + +Global Attributes +----------------- + +``amd-pstate`` exposes several global attributes (files) in ``sysfs`` to +control its functionality at the system level. They are located in the +``/sys/devices/system/cpu/amd-pstate/`` directory and affect all CPUs. + +``status`` + Operation mode of the driver: "active", "passive" or "disable". + + "active" + The driver is functional and in the ``active mode`` + + "passive" + The driver is functional and in the ``passive mode`` + + "disable" + The driver is unregistered and not functional now. + + This attribute can be written to in order to change the driver's + operation mode or to unregister it. The string written to it must be + one of the possible values of it and, if successful, writing one of + these values to the sysfs file will cause the driver to switch over + to the operation mode represented by that string - or to be + unregistered in the "disable" case. + ``cpupower`` tool support for ``amd-pstate`` ===============================================