From b95a0c02ada527b7cfc2e329d262324661fe30ce Mon Sep 17 00:00:00 2001 From: Changwoo Min Date: Tue, 21 Oct 2025 07:09:13 +0900 Subject: [PATCH] PM: EM: Implement em_notify_pd_created/updated() Implement two event notifications when a performance domain is created (EM_CMD_PD_CREATED) and updated (EM_CMD_PD_UPDATED). The message format of these two event notifications is the same as EM_CMD_GET_PD_TABLE -- containing the performance domain's ID and its energy model table. Signed-off-by: Changwoo Min Reviewed-by: Lukasz Luba Link: https://patch.msgid.link/20251020220914.320832-10-changwoo@igalia.com Signed-off-by: Rafael J. Wysocki --- kernel/power/em_netlink.c | 44 +++++++++++++++++++++++++++++++++++++++ kernel/power/em_netlink.h | 6 ++++++ 2 files changed, 50 insertions(+) diff --git a/kernel/power/em_netlink.c b/kernel/power/em_netlink.c index 43118b028bb6d..4b85da138a063 100644 --- a/kernel/power/em_netlink.c +++ b/kernel/power/em_netlink.c @@ -215,6 +215,50 @@ out_free_msg: /**************************** Event encoding *********************************/ +static void __em_notify_pd_table(const struct em_perf_domain *pd, int ntf_type) +{ + struct sk_buff *msg; + int msg_sz, ret = -EMSGSIZE; + void *hdr; + + if (!genl_has_listeners(&em_nl_family, &init_net, EM_NLGRP_EVENT)) + return; + + msg_sz = __em_nl_get_pd_table_size(pd); + + msg = genlmsg_new(msg_sz, GFP_KERNEL); + if (!msg) + return; + + hdr = genlmsg_put(msg, 0, 0, &em_nl_family, 0, ntf_type); + if (!hdr) + goto out_free_msg; + + ret = __em_nl_get_pd_table(msg, pd); + if (ret) + goto out_free_msg; + + genlmsg_end(msg, hdr); + + genlmsg_multicast(&em_nl_family, msg, 0, EM_NLGRP_EVENT, GFP_KERNEL); + + return; + +out_free_msg: + nlmsg_free(msg); + return; +} + +void em_notify_pd_created(const struct em_perf_domain *pd) +{ + __em_notify_pd_table(pd, EM_CMD_PD_CREATED); +} + +void em_notify_pd_updated(const struct em_perf_domain *pd) +{ + __em_notify_pd_table(pd, EM_CMD_PD_UPDATED); +} + static int __em_notify_pd_deleted_size(const struct em_perf_domain *pd) { int id_sz = nla_total_size(sizeof(u32)); /* EM_A_PD_TABLE_PD_ID */ diff --git a/kernel/power/em_netlink.h b/kernel/power/em_netlink.h index d56e5865e1ed4..583d7f1c39390 100644 --- a/kernel/power/em_netlink.h +++ b/kernel/power/em_netlink.h @@ -13,7 +13,9 @@ 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); +void em_notify_pd_created(const struct em_perf_domain *pd); void em_notify_pd_deleted(const struct em_perf_domain *pd); +void em_notify_pd_updated(const struct em_perf_domain *pd); #else static inline int for_each_em_perf_domain(int (*cb)(struct em_perf_domain*, void *), @@ -27,7 +29,11 @@ struct em_perf_domain *em_perf_domain_get_by_id(int id) return NULL; } +static inline void em_notify_pd_created(const struct em_perf_domain *pd) {} + static inline void em_notify_pd_deleted(const struct em_perf_domain *pd) {} + +static inline void em_notify_pd_updated(const struct em_perf_domain *pd) {} #endif #endif /* _EM_NETLINK_H */ -- 2.47.3