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Fri, 8 Mar 2024 10:36:50 GMT Received: from hu-sibis-blr.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Fri, 8 Mar 2024 02:36:45 -0800 From: Sibi Sankar To: , , , , CC: , , , , , , , Sibi Sankar Subject: [PATCH V2] cpufreq: Fix per-policy boost behavior on SoCs using cpufreq_boost_set_sw Date: Fri, 8 Mar 2024 16:06:30 +0530 Message-ID: <20240308103630.383371-1-quic_sibis@quicinc.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: 7YvgX_hv4skigzOnySS8XvpEfAVqega5 X-Proofpoint-GUID: 7YvgX_hv4skigzOnySS8XvpEfAVqega5 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-03-08_07,2024-03-06_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 adultscore=0 suspectscore=0 phishscore=0 bulkscore=0 lowpriorityscore=0 mlxlogscore=999 priorityscore=1501 clxscore=1015 impostorscore=0 mlxscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2402120000 definitions=main-2403080084 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240308_023748_347302_2E2652E6 X-CRM114-Status: GOOD ( 17.82 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org In the existing code, per-policy flags doesn't have any impact i.e. if cpufreq_driver boost is enabled and one or more of the per-policy boost is disabled, the cpufreq driver will behave as if boost is enabled. Fix this by incorporating per-policy boost flag in the policy->max calculus used in cpufreq_frequency_table_cpuinfo and setting the default per-policy boost to mirror the cpufreq_driver boost flag. Fixes: 218a06a79d9a ("cpufreq: Support per-policy performance boost") Reported-by: Dietmar Eggemann Signed-off-by: Sibi Sankar Reviewed-by: Viresh Kumar Reviewed-by: Dhruva Gole --- v2: * Enable per-policy boost flag in the core instead. [Viresh] * Add more details regarding the bug. [Viresh] * Drop cover-letter and patch 2. Logs reported-by Dietmar Eggemann: https://lore.kernel.org/lkml/265e5f2c-9b45-420f-89b1-44369aeb8418@arm.com/ drivers/cpufreq/cpufreq.c | 19 +++++++++++++------ drivers/cpufreq/freq_table.c | 2 +- 2 files changed, 14 insertions(+), 7 deletions(-) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index f6f8d7f450e7..c04b2ba2993a 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -653,14 +653,16 @@ static ssize_t store_local_boost(struct cpufreq_policy *policy, if (policy->boost_enabled == enable) return count; + policy->boost_enabled = enable; + cpus_read_lock(); ret = cpufreq_driver->set_boost(policy, enable); cpus_read_unlock(); - if (ret) + if (ret) { + policy->boost_enabled = !policy->boost_enabled; return ret; - - policy->boost_enabled = enable; + } return count; } @@ -1428,6 +1430,10 @@ static int cpufreq_online(unsigned int cpu) goto out_free_policy; } + /* Let the per-policy boost flag mirror the cpufreq_driver boost during init */ + if (cpufreq_driver->boost_enabled) + policy->boost_enabled = policy_has_boost_freq(policy) ? true : false; + /* * The initialization has succeeded and the policy is online. * If there is a problem with its frequency table, take it @@ -2769,11 +2775,12 @@ int cpufreq_boost_trigger_state(int state) cpus_read_lock(); for_each_active_policy(policy) { + policy->boost_enabled = state; ret = cpufreq_driver->set_boost(policy, state); - if (ret) + if (ret) { + policy->boost_enabled = !policy->boost_enabled; goto err_reset_state; - - policy->boost_enabled = state; + } } cpus_read_unlock(); diff --git a/drivers/cpufreq/freq_table.c b/drivers/cpufreq/freq_table.c index c4d4643b6ca6..c17dc51a5a02 100644 --- a/drivers/cpufreq/freq_table.c +++ b/drivers/cpufreq/freq_table.c @@ -40,7 +40,7 @@ int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, cpufreq_for_each_valid_entry(pos, table) { freq = pos->frequency; - if (!cpufreq_boost_enabled() + if ((!cpufreq_boost_enabled() || !policy->boost_enabled) && (pos->flags & CPUFREQ_BOOST_FREQ)) continue;