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Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by SN1PEPF0002529D.mail.protection.outlook.com (10.167.242.4) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.7292.25 via Frontend Transport; Tue, 27 Feb 2024 07:12:12 +0000 Received: from jasmine-meng.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Tue, 27 Feb 2024 01:11:59 -0600 From: Meng Li To: "Rafael J . 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: fix setting policy current frequency value Date: Tue, 27 Feb 2024 15:11:33 +0800 Message-ID: <20240227071133.3405003-1-li.meng@amd.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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-TrafficTypeDiagnostic: SN1PEPF0002529D:EE_|CH3PR12MB8305:EE_ X-MS-Office365-Filtering-Correlation-Id: 8ac0c605-562c-4ba5-3903-08dc37636bda X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: qN+SPSzs6vncy/9fpOB2BpN0lgl7HTnjFwFDl5ma8+/0mxK/bCUwMDIFd4GSqqG/Z0ddUKFFFiAUd9zzNzo3BFlZ3pKrTNdiZGP7PqmjmU/6lBsP2Am6l/YKIyyigvzVw+t4+w/8jzqDRzQlKEojPYExd2kjiC5TIvGhIaJjktKJxogGHOT+olTzgRY3RUrasz3sfAGafdA8nXbD6VKKxq6zTNITNPkMzPrIYahUmLFIofV2l3pV58izuG4uMAn2A5hfOKHWnAw03VRxnwSj7JqHj75gh9FLA7t+1khEsSAsFX0tLEqfsAjvrwbxcxEKKtp1Bj+5E42yE9x/otGflSFFwmDav+Mgk55XHuolgCpvlJNGRfv/14MHvXRAcvrh8fUF4m+CHnJK2SJbidBIcL2BoN4+mI0YmMf3qEzPiGLl+t+DBnsr2haCMr4WKcGZHxkbyOm4//VgIb2APO3QehkoCxCzlJlIi3TY6SH8F9IB9cQ6SRKKGlC8gH1LnkNXYPGssmNZ+g0b/O2TpcmmcuCtK5DIBvFIcT/a8JI6VIeesVN075Pb3kRcBbvtUz50chAp/7vuOhta+an3iEJwrZ270gLdGk5GTmFW26Z8ItHED1c1tRT8z8nv0xZDnl49k70xThp058bsHKn40RyShxgZivSMriPuwp2VQ9aO14VP6uVCOr+rAYzw04B8LlzveBzW+bYLRWag/w8gmdDOMlov2R00KyGiCKVrDVFPN6qMc0IjT0f+o74/nR2saym/ 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 07:12:12.9896 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 8ac0c605-562c-4ba5-3903-08dc37636bda 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: SN1PEPF0002529D.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB8305 When scaling min/max freq values were being setted, the value of policy->cur need to update. Signed-off-by: Meng Li --- drivers/cpufreq/amd-pstate.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index aa5e57e27d2b..a1062bc06a60 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -437,6 +437,8 @@ static inline bool amd_pstate_sample(struct amd_cpudata *cpudata) static void amd_pstate_update(struct amd_cpudata *cpudata, u32 min_perf, u32 des_perf, u32 max_perf, bool fast_switch, int gov_flags) { + unsigned long max_freq; + struct cpufreq_policy *policy = cpufreq_cpu_get(cpudata->cpu); u64 prev = READ_ONCE(cpudata->cppc_req_cached); u64 value = prev; @@ -446,6 +448,9 @@ static void amd_pstate_update(struct amd_cpudata *cpudata, u32 min_perf, cpudata->max_limit_perf); des_perf = clamp_t(unsigned long, des_perf, min_perf, max_perf); + max_freq = READ_ONCE(cpudata->max_limit_freq); + policy->cur = div_u64(des_perf * max_freq, max_perf); + if ((cppc_state == AMD_PSTATE_GUIDED) && (gov_flags & CPUFREQ_GOV_DYNAMIC_SWITCHING)) { min_perf = des_perf; des_perf = 0; @@ -560,10 +565,9 @@ static void amd_pstate_adjust_perf(unsigned int cpu, unsigned long capacity) { unsigned long max_perf, min_perf, des_perf, - cap_perf, lowest_nonlinear_perf, max_freq; + cap_perf, lowest_nonlinear_perf; struct cpufreq_policy *policy = cpufreq_cpu_get(cpu); struct amd_cpudata *cpudata = policy->driver_data; - unsigned int target_freq; if (policy->min != cpudata->min_limit_freq || policy->max != cpudata->max_limit_freq) amd_pstate_update_min_max_limit(policy); @@ -571,7 +575,6 @@ static void amd_pstate_adjust_perf(unsigned int cpu, cap_perf = READ_ONCE(cpudata->highest_perf); lowest_nonlinear_perf = READ_ONCE(cpudata->lowest_nonlinear_perf); - max_freq = READ_ONCE(cpudata->max_freq); des_perf = cap_perf; if (target_perf < capacity) @@ -589,8 +592,6 @@ static void amd_pstate_adjust_perf(unsigned int cpu, max_perf = min_perf; des_perf = clamp_t(unsigned long, des_perf, min_perf, max_perf); - target_freq = div_u64(des_perf * max_freq, max_perf); - policy->cur = target_freq; amd_pstate_update(cpudata, min_perf, des_perf, max_perf, true, policy->governor->flags); @@ -1449,6 +1450,12 @@ static int amd_pstate_epp_set_policy(struct cpufreq_policy *policy) amd_pstate_epp_update_limit(policy); + /* + * policy->cur is never updated with the amd_pstate_epp driver, but it + * is used as a stale frequency value. So, keep it within limits. + */ + policy->cur = policy->min; + return 0; }