[PATCH v5 7/8] cpufreq: Read inefficiencies from EM
From: Vincent Donnefort <hidden>
Date: 2021-08-26 08:36:36
Subsystem:
cpu frequency scaling framework, the rest · Maintainers:
"Rafael J. Wysocki", Viresh Kumar, Linus Torvalds
The Energy Model has a 1:1 mapping between OPPs and performance states (em_perf_state). If a CPUFreq driver registers an Energy Model, inefficiencies found by the latter can be applied to CPUFreq. This applies to all drivers using the generic callback cpufreq_register_em_with_opp() for .register_em. Signed-off-by: Vincent Donnefort <redacted>
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 2554dd1ec09d..50bf38ea2539 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h@@ -1104,9 +1104,38 @@ void cpufreq_generic_init(struct cpufreq_policy *policy, struct cpufreq_frequency_table *table, unsigned int transition_latency); +static inline void +cpufreq_read_inefficiencies_from_em(struct cpufreq_policy *policy, + struct em_perf_domain *em_pd) +{ + struct em_perf_state *em_table; + int i; + + if (!em_pd) + return; + + /* Inefficiencies support needs a sorted table */ + if (!policy->freq_table || + policy->freq_table_sorted == CPUFREQ_TABLE_UNSORTED) + return; + + em_table = em_pd->table; + + for (i = 0; i < em_pd->nr_perf_states; i++) { + if (!(em_table[i].flags & EM_PERF_STATE_INEFFICIENT)) + continue; + + cpufreq_table_set_inefficient(policy, + em_table[i].frequency); + em_pd->flags |= EM_PERF_DOMAIN_SKIP_INEFFICIENCIES; + } +} + static inline void cpufreq_register_em_with_opp(struct cpufreq_policy *policy) { - dev_pm_opp_of_register_em(get_cpu_device(policy->cpu), - policy->related_cpus); + struct device *cpu_dev = get_cpu_device(policy->cpu); + + dev_pm_opp_of_register_em(cpu_dev, policy->related_cpus); + cpufreq_read_inefficiencies_from_em(policy, em_pd_get(cpu_dev)); } #endif /* _LINUX_CPUFREQ_H */
--
2.7.4