diff options
| author | Changwoo Min <changwoo@igalia.com> | 2025-10-21 07:09:09 +0900 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2025-10-22 21:44:37 +0200 |
| commit | 7928339cfe7d80f35bca905f0a2358271a4e6aa7 (patch) | |
| tree | 437923c0596ae80d689c33f94b08da9d0f08d421 | |
| parent | e4ed8d26c5d320d9b9a6ee013a94b7ad73b4d243 (diff) | |
PM: EM: Add an iterator and accessor for the performance domain
Add an iterator function (for_each_em_perf_domain) that iterates all the
performance domains in the global list. A passed callback function (cb) is
called for each performance domain.
Additionally, add a lookup function (em_perf_domain_get_by_id) that
searches for a performance domain by matching the ID in the global list.
Signed-off-by: Changwoo Min <changwoo@igalia.com>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://patch.msgid.link/20251020220914.320832-6-changwoo@igalia.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | kernel/power/em_netlink.h | 14 | ||||
| -rw-r--r-- | kernel/power/energy_model.c | 38 |
2 files changed, 52 insertions, 0 deletions
diff --git a/kernel/power/em_netlink.h b/kernel/power/em_netlink.h index acd186c92d6b..8114b018c73b 100644 --- a/kernel/power/em_netlink.h +++ b/kernel/power/em_netlink.h @@ -10,7 +10,21 @@ #define _EM_NETLINK_H #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_NET) +int for_each_em_perf_domain(int (*cb)(struct em_perf_domain*, void *), + void *data); +struct em_perf_domain *em_perf_domain_get_by_id(int id); #else +static inline +int for_each_em_perf_domain(int (*cb)(struct em_perf_domain*, void *), + void *data) +{ + return -EINVAL; +} +static inline +struct em_perf_domain *em_perf_domain_get_by_id(int id) +{ + return NULL; +} #endif #endif /* _EM_NETLINK_H */ diff --git a/kernel/power/energy_model.c b/kernel/power/energy_model.c index 756debf5406a..9e35aba4b113 100644 --- a/kernel/power/energy_model.c +++ b/kernel/power/energy_model.c @@ -17,6 +17,8 @@ #include <linux/sched/topology.h> #include <linux/slab.h> +#include "em_netlink.h" + /* * Mutex serializing the registrations of performance domains and letting * callbacks defined by drivers sleep. @@ -998,3 +1000,39 @@ void em_rebuild_sched_domains(void) */ schedule_work(&rebuild_sd_work); } + +#if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_NET) +int for_each_em_perf_domain(int (*cb)(struct em_perf_domain*, void *), + void *data) +{ + struct em_perf_domain *pd; + + lockdep_assert_not_held(&em_pd_mutex); + guard(mutex)(&em_pd_list_mutex); + + list_for_each_entry(pd, &em_pd_list, node) { + int ret; + + ret = cb(pd, data); + if (ret) + return ret; + } + + return 0; +} + +struct em_perf_domain *em_perf_domain_get_by_id(int id) +{ + struct em_perf_domain *pd; + + lockdep_assert_not_held(&em_pd_mutex); + guard(mutex)(&em_pd_list_mutex); + + list_for_each_entry(pd, &em_pd_list, node) { + if (pd->id == id) + return pd; + } + + return NULL; +} +#endif |