From nobody Wed Dec 17 21:54:43 2025 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 C6E721EDA3C; Mon, 20 Oct 2025 22:10:02 +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=1760998204; cv=none; b=DT25YgH0EifA3oK8Mlj7tpneFVkh5m7y0x5fAql/6L8wLPB7oDN4i5AdvwKjTzt37PzvHDWK0ZVjDXqgYf4sAu8xxolKnc7zmmTkyCLgSSWA7mAMMSgX7YCnjMZV/lFKwrtLO8ovgX3m1e+jpJjk9r8rDWfqKiWfCj8j0to2FCo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760998204; c=relaxed/simple; bh=JNVEetGOOKimrvF3st8IszhQvE8f4KA5fZu+samorgI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FH887lIwzzOf2EgI8azJY24I+ybuPWi2+GlgNZb7IYUnGuCTVgbIDuuROp1P0kKGRU+jm95Vq63X66L8KXjAPnuiNtRZiQS6EL0XYEp96eLUsL0n1Yfov4QMSLmRUVSbmarjVvoYvK8MbE20cqL4S8LZeZNgT8XCjclCy0ynlls= 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=H/HJG07m; 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="H/HJG07m" 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=B0+I0amzo5CktDhZzZTK3wgcMJaYxUQ98kpofcboRSE=; b=H/HJG07mG3HWabPnfFLPAy8tIq HyY7cxHEcnzlwewzT+5l1CCcJtSMyNKAtk2oYmSkljMsMC/aREqRvwOxoSZVj8Jl4IYd90C2/QloU N3ENTCFjf/bbKJvMyTZbQ8LAm8StkZvSiTypCriaaF/plhyHPcIvajs4XUeqWRNPc8Deyn/2Rx9+/ CYjco5tzy/sUTnA7gqzEbiprHOWiyopSij2mR24kObtzPeJIvtnkKDSz6CdFKcnMyToQQWkp1wSOl G58OYT//f/xL6UOVLZsuVu7S86YvBfzTyxxTEC/yXVzzy5+66hapqhprcnjXMYOYAxVQO9EIoTgE2 8S/U8rWQ==; Received: from [58.29.143.236] (helo=localhost) by fanzine2.igalia.com with esmtpsa (Cipher TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1vAy4h-00CHYq-0j; Tue, 21 Oct 2025 00:09:56 +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 v6 04/10] PM: EM: Add a skeleton code for netlink notification Date: Tue, 21 Oct 2025 07:09:08 +0900 Message-ID: <20251020220914.320832-5-changwoo@igalia.com> X-Mailer: git-send-email 2.51.1.dirty In-Reply-To: <20251020220914.320832-1-changwoo@igalia.com> References: <20251020220914.320832-1-changwoo@igalia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add a boilerplate code for netlink notification to register the new protocol family. Also, initialize and register the netlink during booting. The initialization is called at the postcore level, which is late enough after the generic netlink is initialized. Finally, update MAINTAINERS to include new files. Signed-off-by: Changwoo Min --- MAINTAINERS | 2 +- kernel/power/Makefile | 5 ++++- kernel/power/em_netlink.c | 35 +++++++++++++++++++++++++++++++++++ kernel/power/em_netlink.h | 16 ++++++++++++++++ 4 files changed, 56 insertions(+), 2 deletions(-) create mode 100644 kernel/power/em_netlink.c create mode 100644 kernel/power/em_netlink.h diff --git a/MAINTAINERS b/MAINTAINERS index e6b3bab9dbeb..0d96aadb0d86 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -9183,7 +9183,7 @@ F: include/linux/energy_model.h F: Documentation/power/energy-model.rst F: Documentation/netlink/specs/em.yaml F: include/uapi/linux/energy_model.h -F: kernel/power/em_netlink_autogen.* +F: kernel/power/em_netlink*.* =20 EPAPR HYPERVISOR BYTE CHANNEL DEVICE DRIVER M: Laurentiu Tudor diff --git a/kernel/power/Makefile b/kernel/power/Makefile index 874ad834dc8d..284a760aade7 100644 --- a/kernel/power/Makefile +++ b/kernel/power/Makefile @@ -21,4 +21,7 @@ obj-$(CONFIG_PM_WAKELOCKS) +=3D wakelock.o =20 obj-$(CONFIG_MAGIC_SYSRQ) +=3D poweroff.o =20 -obj-$(CONFIG_ENERGY_MODEL) +=3D energy_model.o +obj-$(CONFIG_ENERGY_MODEL) +=3D em.o +em-y :=3D energy_model.o +em-$(CONFIG_NET) +=3D em_netlink_autogen.o em_netlink.o + diff --git a/kernel/power/em_netlink.c b/kernel/power/em_netlink.c new file mode 100644 index 000000000000..f3fbfeff29a4 --- /dev/null +++ b/kernel/power/em_netlink.c @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * + * Generic netlink for energy model. + * + * Copyright (c) 2025 Valve Corporation. + * Author: Changwoo Min + */ + +#define pr_fmt(fmt) "energy_model: " fmt + +#include +#include +#include +#include + +#include "em_netlink.h" +#include "em_netlink_autogen.h" + +int em_nl_get_pds_doit(struct sk_buff *skb, struct genl_info *info) +{ + return -EOPNOTSUPP; +} + +int em_nl_get_pd_table_doit(struct sk_buff *skb, struct genl_info *info) +{ + return -EOPNOTSUPP; +} + +static int __init em_netlink_init(void) +{ + return genl_register_family(&em_nl_family); +} +postcore_initcall(em_netlink_init); + diff --git a/kernel/power/em_netlink.h b/kernel/power/em_netlink.h new file mode 100644 index 000000000000..acd186c92d6b --- /dev/null +++ b/kernel/power/em_netlink.h @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * + * Generic netlink for energy model. + * + * Copyright (c) 2025 Valve Corporation. + * Author: Changwoo Min + */ +#ifndef _EM_NETLINK_H +#define _EM_NETLINK_H + +#if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_NET) +#else +#endif + +#endif /* _EM_NETLINK_H */ --=20 2.51.1.dirty