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Wysocki" , Viresh Kumar , Shuah Khan , "Borislav Petkov" , Peter Zijlstra , Ingo Molnar , Giovanni Gherdovich , CC: Deepak Sharma , Alex Deucher , Mario Limonciello , Steven Noonan , Nathan Fontenot , Jinzhou Su , Xiaojian Du , , , Huang Rui Subject: [PATCH v5 14/22] cpupower: add the function to check amd-pstate enabled Date: Tue, 30 Nov 2021 20:36:33 +0800 Message-ID: <20211130123641.1449041-15-ray.huang@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211130123641.1449041-1-ray.huang@amd.com> References: <20211130123641.1449041-1-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: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 39dc3321-c659-4562-421a-08d9b3fe41dd X-MS-TrafficTypeDiagnostic: BN6PR12MB1409: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:2733; 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:(4636009)(36840700001)(46966006)(40470700001)(86362001)(5660300002)(26005)(70586007)(6666004)(2616005)(47076005)(82310400004)(70206006)(186003)(356005)(336012)(426003)(110136005)(36756003)(81166007)(36860700001)(316002)(8936002)(7696005)(8676002)(7416002)(4326008)(1076003)(2906002)(54906003)(508600001)(16526019)(40460700001)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Nov 2021 12:38:05.7286 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 39dc3321-c659-4562-421a-08d9b3fe41dd 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: BN8NAM11FT018.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR12MB1409 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The processor with amd-pstate function also supports legacy ACPI hardware P-States feature as well. Once driver sets amd-pstate eanbled, the processor will respond the finer grain amd-pstate feature instead of legacy ACPI P-States. So it introduces the cpupower_amd_pstate_enabled() to check whether the current kernel enables amd-pstate or acpi-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..e03cc97297aa 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-States stuff **************************/ +extern bool cpupower_amd_pstate_enabled(void); + +/* AMD P-States 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