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Wysocki" , Viresh Kumar , Shuah Khan , "Borislav Petkov" , Ingo Molnar , CC: Deepak Sharma , Alex Deucher , Mario Limonciello , Nathan Fontenot , Jinzhou Su , Xiaojian Du , , , Huang Rui Subject: [PATCH 13/19] cpupower: add the function to check amd-pstate enabled Date: Wed, 8 Sep 2021 22:59:55 +0800 Message-ID: <20210908150001.3702552-14-ray.huang@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210908150001.3702552-1-ray.huang@amd.com> References: <20210908150001.3702552-1-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: 9de47605-7254-4efa-5d1f-08d972d99059 X-MS-TrafficTypeDiagnostic: BL1PR12MB5157: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:626; 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)(376002)(39860400002)(136003)(346002)(396003)(36840700001)(46966006)(82740400003)(356005)(81166007)(4326008)(186003)(426003)(1076003)(70586007)(36756003)(2616005)(36860700001)(86362001)(47076005)(6666004)(2906002)(5660300002)(26005)(478600001)(8676002)(8936002)(16526019)(7696005)(70206006)(110136005)(316002)(336012)(82310400003)(54906003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Sep 2021 15:01:40.3352 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9de47605-7254-4efa-5d1f-08d972d99059 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: CO1NAM11FT057.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR12MB5157 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Introduce the cpupower_amd_pstate_enabled() to check whether the kernel mode enables amd-pstate. Signed-off-by: Huang Rui --- tools/power/cpupower/utils/helpers/helpers.h | 5 +++++ tools/power/cpupower/utils/helpers/misc.c | 20 ++++++++++++++++++++ 2 files changed, 25 insertions(+) diff --git a/tools/power/cpupower/utils/helpers/helpers.h b/tools/power/cpupower/utils/helpers/helpers.h index b4813efdfb00..eb43c14d1728 100644 --- a/tools/power/cpupower/utils/helpers/helpers.h +++ b/tools/power/cpupower/utils/helpers/helpers.h @@ -136,6 +136,11 @@ 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 PSTATE enabling **************************/ + +extern unsigned long cpupower_amd_pstate_enabled(unsigned int cpu); + /* * CPUID functions returning a single datum */ diff --git a/tools/power/cpupower/utils/helpers/misc.c b/tools/power/cpupower/utils/helpers/misc.c index fc6e34511721..07d80775fb68 100644 --- a/tools/power/cpupower/utils/helpers/misc.c +++ b/tools/power/cpupower/utils/helpers/misc.c @@ -83,6 +83,26 @@ int cpupower_intel_set_perf_bias(unsigned int cpu, unsigned int val) return 0; } +unsigned long cpupower_amd_pstate_enabled(unsigned int cpu) +{ + char linebuf[MAX_LINE_LEN]; + char path[SYSFS_PATH_MAX]; + unsigned long val; + char *endp; + + snprintf(path, sizeof(path), + PATH_TO_CPU "cpu%u/cpufreq/is_amd_pstate_enabled", cpu); + + if (cpupower_read_sysfs(path, linebuf, MAX_LINE_LEN) == 0) + return 0; + + val = strtoul(linebuf, &endp, 0); + if (endp == linebuf || errno == ERANGE) + return 0; + + return val; +} + #endif /* #if defined(__i386__) || defined(__x86_64__) */ /* get_cpustate -- 2.25.1