--- /dev/null
+#ifndef QEMU_HW_ACPI_MEMORY_HOTPLUG_H
+#define QEMU_HW_ACPI_MEMORY_HOTPLUG_H
+
+#include "hw/qdev-core.h"
+#include "hw/acpi/acpi.h"
+#include "migration/vmstate.h"
+
+/**
+ * MemStatus:
+ * @is_removing: the memory device in slot has been requested to be ejected.
+ *
+ * This structure stores memory device's status.
+ */
+typedef struct MemStatus {
+ DeviceState *dimm;
+ bool is_enabled;
+ bool is_inserting;
+ bool is_removing;
+ uint32_t ost_event;
+ uint32_t ost_status;
+} MemStatus;
+
+typedef struct MemHotplugState {
+ bool is_enabled; /* true if memory hotplug is supported */
+ MemoryRegion io;
+ uint32_t selector;
+ uint32_t dev_count;
+ MemStatus *devs;
+} MemHotplugState;
+
+void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner,
+ MemHotplugState *state);
+
+void acpi_memory_plug_cb(ACPIREGS *ar, qemu_irq irq, MemHotplugState *mem_st,
+ DeviceState *dev, Error **errp);
+void acpi_memory_unplug_request_cb(ACPIREGS *ar, qemu_irq irq,
+ MemHotplugState *mem_st,
+ DeviceState *dev, Error **errp);
+void acpi_memory_unplug_cb(MemHotplugState *mem_st,
+ DeviceState *dev, Error **errp);
+
+extern const VMStateDescription vmstate_memory_hotplug;
+#define VMSTATE_MEMORY_HOTPLUG(memhp, state) \
+ VMSTATE_STRUCT(memhp, state, 1, \
+ vmstate_memory_hotplug, MemHotplugState)
+
+void acpi_memory_ospm_status(MemHotplugState *mem_st, ACPIOSTInfoList ***list);
+#endif