From patchwork Fri Jun 13 09:44:26 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Changwoo Min X-Patchwork-Id: 896137 Received: from fanzine2.igalia.com (fanzine2.igalia.com [213.97.179.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7E5C82D662B; Fri, 13 Jun 2025 09:45:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.97.179.56 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749807929; cv=none; b=Er/wfuF/1ngCX7rlE8Zmy0J7NDt9N8yi8reUwzcFZq/z+311SQtNW3limeTWtGyGZZVJRR1HROxzJBi+0Xlqc03vExrYyKimj50kQpsVUuzmYFRFN5F3OnniyczKj2cLyYUnoRwZeYLoIj8CrR4rQSNjTj2yNdDJfzkEFXba7uA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749807929; c=relaxed/simple; bh=CqN/Qf8e2l9r//Sny9CQ0hyEa0CppQf8VAqiYlI4G4M=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=u9GkK/+BFuJqUIfunoDFdd9p4G40JaMolqt/6z448Y4muEMT2qbw659/DXWgxSgFg3lkZROuI0XPAlqndCw+MhEUmC+rOlCM2u8eCEMkoZAiOler742twM0O3q+hIdaImgH4xP83GJF7vbkoXBYmZXsfvh/dYLIf/JB8SSf7jAA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=igalia.com; spf=pass smtp.mailfrom=igalia.com; dkim=pass (2048-bit key) header.d=igalia.com header.i=@igalia.com header.b=ZIXgdUmt; arc=none smtp.client-ip=213.97.179.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=igalia.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=igalia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=igalia.com header.i=@igalia.com header.b="ZIXgdUmt" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=mks+65N2F057+f+zQWjwi4hlOABnU3KqPspxFC++ges=; b=ZIXgdUmtQ4IktBVe3dwzoDOGli P6E7YOQaqpl8UiSFAvmjylBxISp2vTefGLYf6PnWyjpUHtvqQWkgvZ+VCFuBjmQQaK+H5Iw4hb/+C pK+4eUZ3Zqk0dbrYyqFrEqtBKyUKLDHwYr7dRGd23+D9B9YLzsPR53EP2W6HPYzgCcaK3/L7Vp/oE SLRBL62tmuiQVayxSjtX6n0Kfc74hfU7zpUacYSTYU/PKeOyIayBdgLW8+EgRjwNBJjJmn19YoYn7 VCiiFb9jqhUmuitpVH+JLR4gbqljdHIFlFplukdH977X/sfCoE+5ZCuubBWE3EIjuFHyTemLVB1/y D0k+MGVw==; Received: from [58.29.143.236] (helo=localhost) by fanzine2.igalia.com with utf8esmtpsa (Cipher TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1uQ0yO-002xf3-1l; Fri, 13 Jun 2025 11:45:21 +0200 From: Changwoo Min To: lukasz.luba@arm.com, rafael@kernel.org, len.brown@intel.com, pavel@kernel.org Cc: christian.loehle@arm.com, tj@kernel.org, kernel-dev@igalia.com, linux-pm@vger.kernel.org, sched-ext@lists.linux.dev, linux-kernel@vger.kernel.org, Changwoo Min Subject: [PATCH v2 08/10] PM: EM: Implement em_notify_pd_deleted(). Date: Fri, 13 Jun 2025 18:44:26 +0900 Message-ID: <20250613094428.267791-9-changwoo@igalia.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250613094428.267791-1-changwoo@igalia.com> References: <20250613094428.267791-1-changwoo@igalia.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add the event notification infrastructure and implement the event notification for when a performance domain is deleted (EM_CMD_PD_DELETED). The event contains the ID of the performance domain (EM_A_PD_TABLE_PD_ID) so the userspace can identify the changed performance domain for further processing. Signed-off-by: Changwoo Min --- kernel/power/em_netlink.c | 56 +++++++++++++++++++++++++++++++++++++++ kernel/power/em_netlink.h | 18 +++++++++++++ 2 files changed, 74 insertions(+) diff --git a/kernel/power/em_netlink.c b/kernel/power/em_netlink.c index 981bbf1f9a2f..4e34799fd1f8 100644 --- a/kernel/power/em_netlink.c +++ b/kernel/power/em_netlink.c @@ -213,6 +213,62 @@ int em_nl_get_pd_table_doit(struct sk_buff *skb, struct genl_info *info) return -EMSGSIZE; } + +/**************************** Event encoding *********************************/ +int em_notify_pd_created(const struct em_perf_domain *pd) +{ + return -EOPNOTSUPP; +} + +int em_notify_pd_updated(const struct em_perf_domain *pd) +{ + return -EOPNOTSUPP; +} + +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 */ + + return nlmsg_total_size(genlmsg_msg_size(id_sz)); +} + +int em_notify_pd_deleted(const struct em_perf_domain *pd) +{ + struct sk_buff *msg; + int ret = -EMSGSIZE; + void *hdr; + int msg_sz; + + if (!genl_has_listeners(&em_nl_family, &init_net, EM_NLGRP_EVENT)) + return 0; + + msg_sz = __em_notify_pd_deleted_size(pd); + + msg = genlmsg_new(msg_sz, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + hdr = genlmsg_put(msg, 0, 0, &em_nl_family, 0, EM_CMD_PD_DELETED); + if (!hdr) + goto out_free_msg; + + if (nla_put_u32(msg, EM_A_PD_TABLE_PD_ID, pd->id)) { + ret = -EMSGSIZE; + goto out_free_msg; + } + + genlmsg_end(msg, hdr); + + genlmsg_multicast(&em_nl_family, msg, 0, EM_NLGRP_EVENT, GFP_KERNEL); + + return 0; + +out_free_msg: + nlmsg_free(msg); + return ret; +} + +/**************************** Initialization *********************************/ static int __init em_netlink_init(void) { return genl_register_family(&em_nl_family); diff --git a/kernel/power/em_netlink.h b/kernel/power/em_netlink.h index acd186c92d6b..938c84ca1f40 100644 --- a/kernel/power/em_netlink.h +++ b/kernel/power/em_netlink.h @@ -10,7 +10,25 @@ #define _EM_NETLINK_H #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_NET) +int em_notify_pd_created(const struct em_perf_domain *pd); +int em_notify_pd_deleted(const struct em_perf_domain *pd); +int em_notify_pd_updated(const struct em_perf_domain *pd); + #else +static inline int em_notify_pd_created(const struct em_perf_domain *pd) +{ + return 0; +} + +static inline int em_notify_pd_deleted(const struct em_perf_domain *pd) +{ + return 0; +} + +static inline int em_notify_pd_updated(const struct em_perf_domain *pd) +{ + return 0; +} #endif #endif /* _EM_NETLINK_H */