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PM: EM: Notify an event when the performance domain changes

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Send an event to userspace when a performance domain is created or deleted,
or its energy model is updated.

Signed-off-by: Changwoo Min <changwoo@igalia.com>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://patch.msgid.link/20251020220914.320832-11-changwoo@igalia.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Changwoo Min
2025-10-21 07:09:14 +09:00
committed by Rafael J. Wysocki
parent b95a0c02ad
commit a1b17c9ac8
1 changed files with 5 additions and 0 deletions
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5
kernel/power/energy_model.c
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@@ -352,6 +352,8 @@ int em_dev_update_perf_domain(struct device *dev,
em_table_free(old_table);
mutex_unlock(&em_pd_mutex);
em_notify_pd_updated(pd);
return 0;
}
EXPORT_SYMBOL_GPL(em_dev_update_perf_domain);
@@ -696,6 +698,7 @@ unlock:
list_add_tail(&dev->em_pd->node, &em_pd_list);
mutex_unlock(&em_pd_list_mutex);
em_notify_pd_created(dev->em_pd);
return ret;
}
EXPORT_SYMBOL_GPL(em_dev_register_pd_no_update);
@@ -718,6 +721,8 @@ void em_dev_unregister_perf_domain(struct device *dev)
list_del_init(&dev->em_pd->node);
mutex_unlock(&em_pd_list_mutex);
em_notify_pd_deleted(dev->em_pd);
/*
* The mutex separates all register/unregister requests and protects
* from potential clean-up/setup issues in the debugfs directories.