diff options
| author | Lukasz Luba <lukasz.luba@arm.com> | 2024-02-08 11:55:45 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2024-02-08 15:00:30 +0100 |
| commit | 977230d5d50314f9920d3ee6348773d8babbfb58 (patch) | |
| tree | 547f238716210bdba51ec21b63c0c8fa58803c24 /include/linux/energy_model.h | |
| parent | ffcf9bce7af02a21fb73738999de1e3d4fde5aca (diff) | |
PM: EM: Introduce em_dev_update_perf_domain() for EM updates
Add API function em_dev_update_perf_domain() which allows the EM to be
changed safely.
Concurrent updaters are serialized with a mutex and the removal of memory
that will not be used any more is carried out with the help of RCU.
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/energy_model.h')
| -rw-r--r-- | include/linux/energy_model.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/energy_model.h b/include/linux/energy_model.h index 27911dc1887e..324a3a8e0a2d 100644 --- a/include/linux/energy_model.h +++ b/include/linux/energy_model.h @@ -183,6 +183,8 @@ struct em_data_callback { struct em_perf_domain *em_cpu_get(int cpu); struct em_perf_domain *em_pd_get(struct device *dev); +int em_dev_update_perf_domain(struct device *dev, + struct em_perf_table __rcu *new_table); int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states, struct em_data_callback *cb, cpumask_t *span, bool microwatts); @@ -376,6 +378,12 @@ struct em_perf_table __rcu *em_table_alloc(struct em_perf_domain *pd) return NULL; } static inline void em_table_free(struct em_perf_table __rcu *table) {} +static inline +int em_dev_update_perf_domain(struct device *dev, + struct em_perf_table __rcu *new_table) +{ + return -EINVAL; +} #endif #endif |