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Wysocki" , CC: Deepak Sharma , Alex Deucher , Mario Limonciello , Steven Noonan , Nathan Fontenot , Jinzhou Su , Xiaojian Du , Perry Yuan , Jassmine Meng , Borislav Petkov , Peter Zijlstra , Ingo Molnar , Viresh Kumar , Steven Rostedt , "Giovanni Gherdovich" , , Huang Rui Subject: [PATCH v7 02/10] cpupower: Add the function to check AMD P-State enabled Date: Tue, 22 Feb 2022 23:34:18 +0800 Message-ID: <20220222153426.2216974-3-ray.huang@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220222153426.2216974-1-ray.huang@amd.com> References: <20220222153426.2216974-1-ray.huang@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain 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-Office365-Filtering-Correlation-Id: 06af5af6-0287-4fd3-0561-08d9f618e351 X-MS-TrafficTypeDiagnostic: DM4PR12MB5373:EE_ X-Microsoft-Antispam-PRVS: 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:(13230001)(4636009)(46966006)(40470700004)(36840700001)(336012)(7696005)(70206006)(6666004)(316002)(186003)(110136005)(40460700003)(426003)(26005)(82310400004)(47076005)(86362001)(4326008)(36860700001)(8676002)(54906003)(36756003)(5660300002)(7416002)(2906002)(8936002)(2616005)(1076003)(81166007)(70586007)(508600001)(356005)(16526019)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Feb 2022 15:35:00.1927 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 06af5af6-0287-4fd3-0561-08d9f618e351 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: DM6NAM11FT031.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB5373 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The processor with AMD P-State function also supports legacy ACPI hardware P-States feature as well. Once driver sets AMD P-State eanbled, the processor will respond the finer grain AMD P-State feature instead of legacy ACPI P-States. So it introduces the cpupower_amd_pstate_enabled() to check whether the current kernel enables AMD P-State or AMD CPUFreq module. Signed-off-by: Huang Rui --- tools/power/cpupower/utils/helpers/helpers.h | 10 ++++++++++ tools/power/cpupower/utils/helpers/misc.c | 18 ++++++++++++++++++ 2 files changed, 28 insertions(+) diff --git a/tools/power/cpupower/utils/helpers/helpers.h b/tools/power/cpupower/utils/helpers/helpers.h index b4813efdfb00..62771a086871 100644 --- a/tools/power/cpupower/utils/helpers/helpers.h +++ b/tools/power/cpupower/utils/helpers/helpers.h @@ -11,6 +11,7 @@ #include #include +#include #include "helpers/bitmask.h" #include @@ -136,6 +137,12 @@ extern int decode_pstates(unsigned int cpu, int boost_states, extern int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active, int * states); + +/* AMD P-State stuff **************************/ +bool cpupower_amd_pstate_enabled(void); + +/* AMD P-State stuff **************************/ + /* * CPUID functions returning a single datum */ @@ -168,6 +175,9 @@ static inline int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active, int * states) { return -1; } +static inline bool cpupower_amd_pstate_enabled(void) +{ return false; } + /* cpuid and cpuinfo helpers **************************/ static inline unsigned int cpuid_eax(unsigned int op) { return 0; }; diff --git a/tools/power/cpupower/utils/helpers/misc.c b/tools/power/cpupower/utils/helpers/misc.c index fc6e34511721..0c483cdefcc2 100644 --- a/tools/power/cpupower/utils/helpers/misc.c +++ b/tools/power/cpupower/utils/helpers/misc.c @@ -3,9 +3,11 @@ #include #include #include +#include #include "helpers/helpers.h" #include "helpers/sysfs.h" +#include "cpufreq.h" #if defined(__i386__) || defined(__x86_64__) @@ -83,6 +85,22 @@ int cpupower_intel_set_perf_bias(unsigned int cpu, unsigned int val) return 0; } +bool cpupower_amd_pstate_enabled(void) +{ + char *driver = cpufreq_get_driver(0); + bool ret = false; + + if (!driver) + return ret; + + if (!strcmp(driver, "amd-pstate")) + ret = true; + + cpufreq_put_driver(driver); + + return ret; +} + #endif /* #if defined(__i386__) || defined(__x86_64__) */ /* get_cpustate -- 2.25.1