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Sat, 9 Jul 2022 09:19:10 -0500 From: Perry Yuan To: , , CC: , , , , , , , , , , Perry Yuan Subject: [PATCH v2 07/14] cpufreq: amd_pstate: map desired perf into pstate scope for powersave governor Date: Sat, 9 Jul 2022 10:19:01 -0400 Message-ID: <20220709141901.835903-1-Perry.Yuan@amd.com> X-Mailer: git-send-email 2.25.1 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: 438235ca-0842-4b47-70f7-08da61b60097 X-MS-TrafficTypeDiagnostic: DM4PR12MB6325:EE_ 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:(13230016)(4636009)(39860400002)(396003)(376002)(346002)(136003)(46966006)(40470700004)(36840700001)(110136005)(54906003)(86362001)(70586007)(316002)(6636002)(82310400005)(70206006)(8676002)(4326008)(26005)(16526019)(186003)(1076003)(426003)(336012)(47076005)(478600001)(82740400003)(356005)(40480700001)(81166007)(7696005)(40460700003)(41300700001)(6666004)(83380400001)(8936002)(5660300002)(36860700001)(34020700004)(4744005)(2906002)(36756003)(2616005)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Jul 2022 14:19:14.7276 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 438235ca-0842-4b47-70f7-08da61b60097 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: DM6NAM11FT035.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB6325 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,T_SCC_BODY_TEXT_LINE 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 The patch will fix the invalid desired perf value for powersave governor. This issue is found when testing on one AMD EPYC system, the actual des_perf is smaller than the min_perf value, that is invalid value. because the min_perf is the lowest_perf system can support in idle state. Signed-off-by: Perry Yuan --- drivers/cpufreq/amd-pstate.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 7c51f4125263..8a2b6ad9b8c0 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -265,6 +265,7 @@ static void amd_pstate_update(struct amd_cpudata *cpudata, u32 min_perf, u64 prev = READ_ONCE(cpudata->cppc_req_cached); u64 value = prev; + des_perf = clamp_t(unsigned long, des_perf, min_perf, max_perf); value &= ~AMD_CPPC_MIN_PERF(~0L); value |= AMD_CPPC_MIN_PERF(min_perf); -- 2.25.1