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Wysocki" , Huang Rui CC: , , , , Shuah Khan , , "Nathan Fontenot" , Deepak Sharma , Alex Deucher , Mario Limonciello , Shimmer Huang , "Perry Yuan" , Xiaojian Du , Viresh Kumar , Borislav Petkov , Meng Li Subject: [PATCH] cpufreq: amd-pstate: adjust min/max limit perf Date: Tue, 27 Feb 2024 15:39:24 +0800 Message-ID: <20240227073924.3573398-1-li.meng@amd.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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-TrafficTypeDiagnostic: CY4PEPF0000EE37:EE_|SA3PR12MB9159:EE_ X-MS-Office365-Filtering-Correlation-Id: 1b4e8e8c-fd83-49d2-9c12-08dc37674a85 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:(13230031)(82310400014)(36860700004);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Feb 2024 07:39:55.0103 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1b4e8e8c-fd83-49d2-9c12-08dc37674a85 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: CY4PEPF0000EE37.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA3PR12MB9159 Content-Type: text/plain; charset="utf-8" The min/max limit perf values calculated based on frequency may exceed the reasonable range of perf(highest perf, lowest perf). Signed-off-by: Meng Li Reviewed-by: Mario Limonciello --- drivers/cpufreq/amd-pstate.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index aa5e57e27d2b..2015c9fcc3c9 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -484,12 +484,19 @@ static int amd_pstate_verify(struct cpufreq_policy_da= ta *policy) =20 static int amd_pstate_update_min_max_limit(struct cpufreq_policy *policy) { - u32 max_limit_perf, min_limit_perf; + u32 max_limit_perf, min_limit_perf, lowest_perf; struct amd_cpudata *cpudata =3D policy->driver_data; =20 max_limit_perf =3D div_u64(policy->max * cpudata->highest_perf, cpudata->= max_freq); min_limit_perf =3D div_u64(policy->min * cpudata->highest_perf, cpudata->= max_freq); =20 + lowest_perf =3D READ_ONCE(cpudata->lowest_perf); + if (min_limit_perf < lowest_perf) + min_limit_perf =3D lowest_perf; + + if (max_limit_perf < min_limit_perf) + max_limit_perf =3D min_limit_perf; + WRITE_ONCE(cpudata->max_limit_perf, max_limit_perf); WRITE_ONCE(cpudata->min_limit_perf, min_limit_perf); WRITE_ONCE(cpudata->max_limit_freq, policy->max); @@ -1387,6 +1394,12 @@ static void amd_pstate_epp_update_limit(struct cpufr= eq_policy *policy) max_limit_perf =3D div_u64(policy->max * cpudata->highest_perf, cpudata->= max_freq); min_limit_perf =3D div_u64(policy->min * cpudata->highest_perf, cpudata->= max_freq); =20 + if (min_limit_perf < min_perf) + min_limit_perf =3D min_perf; + + if (max_limit_perf < min_limit_perf) + max_limit_perf =3D min_limit_perf; + WRITE_ONCE(cpudata->max_limit_perf, max_limit_perf); WRITE_ONCE(cpudata->min_limit_perf, min_limit_perf); =20 --=20 2.34.1