| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20250529001315.233492-3-changwoo@igalia.com>
Date: Thu, 29 May 2025 09:13:06 +0900
From: Changwoo Min <changwoo@...lia.com>
To: lukasz.luba@....com,
rafael@...nel.org,
len.brown@...el.com,
pavel@...nel.org
Cc: christian.loehle@....com,
tj@...nel.org,
kernel-dev@...lia.com,
linux-pm@...r.kernel.org,
linux-kernel@...r.kernel.org,
Changwoo Min <changwoo@...lia.com>
Subject: [PATCH 02/11] PM: EM: Add a skeleton code for netlink notification.
Add a boilerplate code for netlink notification to register and unregister
the new protocol family. It defines the supported commands and event types
and adds the minimalistic code for the protocol family registration.
Signed-off-by: Changwoo Min <changwoo@...lia.com>
---
include/uapi/linux/energy_model.h | 40 ++++++++++++++++++
kernel/power/Makefile | 1 +
kernel/power/em_netlink.c | 69 +++++++++++++++++++++++++++++++
kernel/power/em_netlink.h | 26 ++++++++++++
4 files changed, 136 insertions(+)
create mode 100644 include/uapi/linux/energy_model.h
create mode 100644 kernel/power/em_netlink.c
create mode 100644 kernel/power/em_netlink.h
diff --git a/include/uapi/linux/energy_model.h b/include/uapi/linux/energy_model.h
new file mode 100644
index 000000000000..42a19e614c7d
--- /dev/null
+++ b/include/uapi/linux/energy_model.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI_LINUX_ENERGY_MODEL_H
+#define _UAPI_LINUX_ENERGY_MODEL_H
+
+/* Adding event notification support elements */
+#define EM_GENL_FAMILY_NAME "energy_model"
+#define EM_GENL_VERSION 0x01
+#define EM_GENL_EVENT_GROUP_NAME "event"
+
+/* Attributes of em_genl_family */
+enum em_genl_attr {
+ EM_GENL_ATTR_UNSPEC,
+ __EM_GENL_ATTR_MAX,
+};
+#define EM_GENL_ATTR_MAX (__EM_GENL_ATTR_MAX - 1)
+
+/* Events of em_genl_family */
+enum em_genl_event {
+ EM_GENL_EVENT_UNSPEC,
+ EM_GENL_EVENT_PD_CREATE, /* Performance domain creation */
+ EM_GENL_EVENT_PD_DELETE, /* Performance domain deletion */
+ EM_GENL_EVENT_PD_UPDATE, /* The runtime EM table for the
+ performance domain is updated */
+ __EM_GENL_EVENT_MAX,
+};
+#define EM_GENL_EVENT_MAX (__EM_GENL_EVENT_MAX - 1)
+
+/* Commands supported by the em_genl_family */
+enum em_genl_cmd {
+ EM_GENL_CMD_UNSPEC,
+ EM_GENL_CMD_PD_GET_ID, /* Get the list of information
+ for all performance domains */
+ EM_GENL_CMD_PD_GET_TBL, /* Get the energy model table
+ of a performance domain */
+ __EM_GENL_CMD_MAX,
+};
+#define EM_GENL_CMD_MAX (__EM_GENL_CMD_MAX - 1)
+
+
+#endif /* _UAPI_LINUX_ENERGY_MODEL_H */
diff --git a/kernel/power/Makefile b/kernel/power/Makefile
index 874ad834dc8d..6bf157b5fffd 100644
--- a/kernel/power/Makefile
+++ b/kernel/power/Makefile
@@ -22,3 +22,4 @@ obj-$(CONFIG_PM_WAKELOCKS) += wakelock.o
obj-$(CONFIG_MAGIC_SYSRQ) += poweroff.o
obj-$(CONFIG_ENERGY_MODEL) += energy_model.o
+obj-$(CONFIG_ENERGY_MODEL_NETLINK) += em_netlink.o
diff --git a/kernel/power/em_netlink.c b/kernel/power/em_netlink.c
new file mode 100644
index 000000000000..30d83fb5a3a8
--- /dev/null
+++ b/kernel/power/em_netlink.c
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *
+ * Generic netlink for energy model.
+ *
+ * Copyright (c) 2025 Valve Corporation.
+ * Author: Changwoo Min <changwoo@...lia.com>
+ */
+
+#define pr_fmt(fmt) "energy_model: " fmt
+
+#include <linux/energy_model.h>
+#include <net/sock.h>
+#include <net/genetlink.h>
+#include <uapi/linux/energy_model.h>
+
+#include "em_netlink.h"
+
+static const struct genl_multicast_group em_genl_mcgrps[] = {
+ [EM_GENL_EVENT_GROUP] = { .name = EM_GENL_EVENT_GROUP_NAME, },
+};
+
+static const struct nla_policy em_genl_policy[EM_GENL_ATTR_MAX + 1] = {
+};
+
+static struct genl_family em_genl_family;
+
+
+static int em_genl_cmd_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ return -ENOTSUPP;
+}
+
+static const struct genl_small_ops em_genl_ops[] = {
+ {
+ .cmd = EM_GENL_CMD_PD_GET_ID,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = em_genl_cmd_doit,
+ },
+ {
+ .cmd = EM_GENL_CMD_PD_GET_TBL,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = em_genl_cmd_doit,
+ },
+};
+
+static struct genl_family em_genl_family __ro_after_init = {
+ .hdrsize = 0,
+ .name = EM_GENL_FAMILY_NAME,
+ .version = EM_GENL_VERSION,
+ .maxattr = EM_GENL_ATTR_MAX,
+ .policy = em_genl_policy,
+ .small_ops = em_genl_ops,
+ .n_small_ops = ARRAY_SIZE(em_genl_ops),
+ .resv_start_op = __EM_GENL_CMD_MAX,
+ .mcgrps = em_genl_mcgrps,
+ .n_mcgrps = ARRAY_SIZE(em_genl_mcgrps),
+};
+
+int __init em_netlink_init(void)
+{
+ return genl_register_family(&em_genl_family);
+}
+
+void __init em_netlink_exit(void)
+{
+ genl_unregister_family(&em_genl_family);
+}
+
diff --git a/kernel/power/em_netlink.h b/kernel/power/em_netlink.h
new file mode 100644
index 000000000000..8cedc6495916
--- /dev/null
+++ b/kernel/power/em_netlink.h
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *
+ * Generic netlink for energy model.
+ *
+ * Copyright (c) 2025 Valve Corporation.
+ * Author: Changwoo Min <changwoo@...lia.com>
+ */
+
+enum em_genl_multicast_groups {
+ EM_GENL_EVENT_GROUP = 0,
+ EM_GENL_MAX_GROUP = EM_GENL_EVENT_GROUP,
+};
+
+/* Netlink notification function */
+#ifdef CONFIG_ENERGY_MODEL_NETLINK
+int __init em_netlink_init(void);
+void __init em_netlink_exit(void);
+#else
+static inline int em_netlink_init(void)
+{
+ return 0;
+}
+
+static inline void em_netlink_exit(void) {}
+#endif /* CONFIG_ENERGY_MODEL_NETLINK */
--
2.49.0
Powered by blists - more mailing lists