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diff --git a/include/hw/acpi/generic_event_device.h b/include/hw/acpi/generic_event_device.h
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+++ b/include/hw/acpi/generic_event_device.h
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+/*
+ *
+ * Copyright (c) 2018 Intel Corporation
+ * Copyright (c) 2019 Huawei Technologies R & D (UK) Ltd
+ * Written by Samuel Ortiz, Shameer Kolothum
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * The ACPI Generic Event Device (GED) is a hardware-reduced specific
+ * device[ACPI v6.1 Section 5.6.9] that handles all platform events,
+ * including the hotplug ones. Generic Event Device allows platforms
+ * to handle interrupts in ACPI ASL statements. It follows a very
+ * similar approach like the _EVT method from GPIO events. All
+ * interrupts are listed in  _CRS and the handler is written in _EVT
+ * method. Here, we use a single interrupt for the GED device, relying
+ * on IO memory region to communicate the type of device affected by
+ * the interrupt. This way, we can support up to 32 events with a
+ * unique interrupt.
+ *
+ * Here is an example.
+ *
+ * Device (\_SB.GED)
+ * {
+ *     Name (_HID, "ACPI0013")
+ *     Name (_UID, Zero)
+ *     Name (_CRS, ResourceTemplate ()
+ *     {
+ *         Interrupt (ResourceConsumer, Edge, ActiveHigh, Exclusive, ,, )
+ *         {
+ *              0x00000029,
+ *         }
+ *     })
+ *     OperationRegion (EREG, SystemMemory, 0x09080000, 0x04)
+ *     Field (EREG, DWordAcc, NoLock, WriteAsZeros)
+ *     {
+ *         ESEL,   32
+ *     }
+ *
+ *     Method (_EVT, 1, Serialized)  // _EVT: Event
+ *     {
+ *         Local0 = ESEL // ESEL = IO memory region which specifies the
+ *                       // device type.
+ *         If (((Local0 & One) == One))
+ *         {
+ *             MethodEvent1()
+ *         }
+ *         If ((Local0 & 0x2) == 0x2)
+ *         {
+ *             MethodEvent2()
+ *         }
+ *         ...
+ *     }
+ * }
+ *
+ */
+
+#ifndef HW_ACPI_GED_H
+#define HW_ACPI_GED_H
+
+#include "hw/sysbus.h"
+#include "hw/acpi/memory_hotplug.h"
+
+#define ACPI_POWER_BUTTON_DEVICE "PWRB"
+
+#define TYPE_ACPI_GED "acpi-ged"
+#define ACPI_GED(obj) \
+    OBJECT_CHECK(AcpiGedState, (obj), TYPE_ACPI_GED)
+
+#define ACPI_GED_EVT_SEL_OFFSET    0x0
+#define ACPI_GED_EVT_SEL_LEN       0x4
+
+#define GED_DEVICE      "GED"
+#define AML_GED_EVT_REG "EREG"
+#define AML_GED_EVT_SEL "ESEL"
+
+/*
+ * Platforms need to specify the GED event bitmap
+ * to describe what kind of events they want to support
+ * through GED.
+ */
+#define ACPI_GED_MEM_HOTPLUG_EVT   0x1
+#define ACPI_GED_PWR_DOWN_EVT      0x2
+
+typedef struct GEDState {
+    MemoryRegion io;
+    uint32_t     sel;
+} GEDState;
+
+typedef struct AcpiGedState {
+    SysBusDevice parent_obj;
+    MemHotplugState memhp_state;
+    MemoryRegion container_memhp;
+    GEDState ged_state;
+    uint32_t ged_event_bitmap;
+    qemu_irq irq;
+} AcpiGedState;
+
+void build_ged_aml(Aml *table, const char* name, HotplugHandler *hotplug_dev,
+                   uint32_t ged_irq, AmlRegionSpace rs, hwaddr ged_base);
+
+#endif