diff --git a/include/linux/sys_hotplug.h b/include/linux/sys_hotplug.h
new file mode 100644
index 0000000..86674dd
--- /dev/null
+++ b/include/linux/sys_hotplug.h
@@ -0,0 +1,181 @@
+/*
+ * sys_hotplug.h - System device hot-plug framework
+ *
+ * Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
+ *	Toshi Kani <toshi.kani@hp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _LINUX_SYS_HOTPLUG_H
+#define _LINUX_SYS_HOTPLUG_H
+
+#include <linux/list.h>
+#include <linux/device.h>
+
+/*
+ * System device hot-plug operation proceeds in the following order.
+ *   Validate phase -> Execute phase -> Commit phase
+ *
+ * The order values below define the calling sequence of platform
+ * neutral handlers for each phase in ascending order.  The order
+ * values of firmware-specific handlers are defined in sys_hotplug.h
+ * under firmware specific directories.
+ */
+
+/* All order values must be smaller than this value */
+#define SHP_ORDER_MAX				0xffffff
+
+/* Add Validate order values */
+
+/* Add Execute order values */
+#define SHP_MEM_ADD_EXECUTE_ORDER		100
+#define SHP_CPU_ADD_EXECUTE_ORDER		110
+
+/* Add Commit order values */
+
+/* Delete Validate order values */
+#define SHP_CPU_DEL_VALIDATE_ORDER		100
+#define SHP_MEM_DEL_VALIDATE_ORDER		110
+
+/* Delete Execute order values */
+#define SHP_CPU_DEL_EXECUTE_ORDER		10
+#define SHP_MEM_DEL_EXECUTE_ORDER		20
+
+/* Delete Commit order values */
+
+/*
+ * Hot-plug request types
+ */
+#define SHP_REQ_ADD		0x000000
+#define SHP_REQ_DELETE		0x000001
+#define SHP_REQ_MASK		0x0000ff
+
+/*
+ * Hot-plug phase types
+ */
+#define SHP_PH_VALIDATE		0x000000
+#define SHP_PH_EXECUTE		0x000100
+#define SHP_PH_COMMIT		0x000200
+#define SHP_PH_MASK		0x00ff00
+
+/*
+ * Hot-plug operation types
+ */
+#define SHP_OP_HOTPLUG		0x000000
+#define SHP_OP_ONLINE		0x010000
+#define SHP_OP_MASK		0xff0000
+
+/*
+ * Hot-plug phases
+ */
+enum shp_phase {
+	SHP_ADD_VALIDATE	= (SHP_REQ_ADD|SHP_PH_VALIDATE),
+	SHP_ADD_EXECUTE		= (SHP_REQ_ADD|SHP_PH_EXECUTE),
+	SHP_ADD_COMMIT		= (SHP_REQ_ADD|SHP_PH_COMMIT),
+	SHP_DEL_VALIDATE	= (SHP_REQ_DELETE|SHP_PH_VALIDATE),
+	SHP_DEL_EXECUTE		= (SHP_REQ_DELETE|SHP_PH_EXECUTE),
+	SHP_DEL_COMMIT		= (SHP_REQ_DELETE|SHP_PH_COMMIT)
+};
+
+/*
+ * Hot-plug operations
+ */
+enum shp_operation {
+	SHP_HOTPLUG_ADD		= (SHP_OP_HOTPLUG|SHP_REQ_ADD),
+	SHP_HOTPLUG_DEL		= (SHP_OP_HOTPLUG|SHP_REQ_DELETE),
+	SHP_ONLINE_ADD		= (SHP_OP_ONLINE|SHP_REQ_ADD),
+	SHP_ONLINE_DEL		= (SHP_OP_ONLINE|SHP_REQ_DELETE)
+};
+
+/*
+ * Hot-plug device classes
+ */
+enum shp_class {
+	SHP_CLS_INVALID		= 0,
+	SHP_CLS_CPU		= 1,
+	SHP_CLS_MEMORY		= 2,
+	SHP_CLS_HOSTBRIDGE	= 3,
+	SHP_CLS_CONTAINER	= 4,
+};
+
+/*
+ * Hot-plug device information
+ */
+union shp_dev_info {
+	struct shp_cpu {
+		u32		cpu_id;
+	} cpu;
+
+	struct shp_memory {
+		int		node;
+		u64		start_addr;
+		u64		length;
+	} mem;
+
+	struct shp_hostbridge {
+	} hb;
+
+	struct shp_node {
+	} node;
+};
+
+struct shp_device {
+	struct list_head	list;
+	struct device		*device;
+	enum shp_class		class;
+	union shp_dev_info	info;
+};
+
+/*
+ * Hot-plug request
+ */
+struct shp_request {
+	/* common info */
+	enum shp_operation	operation;	/* operation */
+
+	/* hot-plug event info: only valid for hot-plug operations */
+	void			*handle;	/* FW handle */
+	u32			event;		/* FW event */
+
+	/* device resource info */
+	struct list_head	dev_list;	/* shp_device list */
+};
+
+/*
+ * Inline Utility Functions
+ */
+static inline bool shp_is_hotplug_op(enum shp_operation operation)
+{
+	return (operation & SHP_OP_MASK) == SHP_OP_HOTPLUG;
+}
+
+static inline bool shp_is_online_op(enum shp_operation operation)
+{
+	return (operation & SHP_OP_MASK) == SHP_OP_ONLINE;
+}
+
+static inline bool shp_is_add_op(enum shp_operation operation)
+{
+	return (operation & SHP_REQ_MASK) == SHP_REQ_ADD;
+}
+
+static inline bool shp_is_add_phase(enum shp_phase phase)
+{
+	return (phase & SHP_REQ_MASK) == SHP_REQ_ADD;
+}
+
+/*
+ * Externs
+ */
+typedef int (*shp_func)(struct shp_request *req, int rollback);
+extern int shp_register_handler(enum shp_phase phase, shp_func func, u32 order);
+extern int shp_unregister_handler(enum shp_phase phase, shp_func func);
+extern int shp_submit_req(struct shp_request *req);
+extern struct shp_request *shp_alloc_request(enum shp_operation operation);
+extern void shp_add_dev_info(struct shp_request *shp_req,
+		struct shp_device *shp_dev);
+
+#endif	/* _LINUX_SYS_HOTPLUG_H */
