3 files changed, 43 insertions, 0 deletions
diff --git a/include/hw/xen/xen-backend.h b/include/hw/xen/xen-backend.h
new file mode 100644
index 0000000000..010d712638
--- /dev/null
+++ b/include/hw/xen/xen-backend.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2018  Citrix Systems Inc.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef HW_XEN_BACKEND_H
+#define HW_XEN_BACKEND_H
+
+#include "hw/xen/xen-bus.h"
+
+typedef struct XenBackendInstance XenBackendInstance;
+
+typedef void (*XenBackendDeviceCreate)(XenBackendInstance *backend,
+                                       QDict *opts, Error **errp);
+typedef void (*XenBackendDeviceDestroy)(XenBackendInstance *backend,
+                                        Error **errp);
+
+typedef struct XenBackendInfo {
+    const char *type;
+    XenBackendDeviceCreate create;
+    XenBackendDeviceDestroy destroy;
+} XenBackendInfo;
+
+XenBus *xen_backend_get_bus(XenBackendInstance *backend);
+const char *xen_backend_get_name(XenBackendInstance *backend);
+
+void xen_backend_set_device(XenBackendInstance *backend,
+                            XenDevice *xendevice);
+XenDevice *xen_backend_get_device(XenBackendInstance *backend);
+
+void xen_backend_register(const XenBackendInfo *info);
+
+void xen_backend_device_create(XenBus *xenbus, const char *type,
+                               const char *name, QDict *opts, Error **errp);
+bool xen_backend_try_device_destroy(XenDevice *xendev, Error **errp);
+
+#endif /* HW_XEN_BACKEND_H */
diff --git a/include/hw/xen/xen-bus.h b/include/hw/xen/xen-bus.h
index 8f39f88d35..3183f10e3c 100644
--- a/include/hw/xen/xen-bus.h
+++ b/include/hw/xen/xen-bus.h
@@ -64,6 +64,7 @@ typedef struct XenBus {
     domid_t backend_id;
     struct xs_handle *xsh;
     NotifierList watch_notifiers;
+    XenWatch *backend_watch;
 } XenBus;
 
 typedef struct XenBusClass {
diff --git a/include/qemu/module.h b/include/qemu/module.h
index 54300ab6e5..55dd2beea8 100644
--- a/include/qemu/module.h
+++ b/include/qemu/module.h
@@ -44,6 +44,7 @@ typedef enum {
     MODULE_INIT_OPTS,
     MODULE_INIT_QOM,
     MODULE_INIT_TRACE,
+    MODULE_INIT_XEN_BACKEND,
     MODULE_INIT_MAX
 } module_init_type;
 
@@ -51,6 +52,8 @@ typedef enum {
 #define opts_init(function) module_init(function, MODULE_INIT_OPTS)
 #define type_init(function) module_init(function, MODULE_INIT_QOM)
 #define trace_init(function) module_init(function, MODULE_INIT_TRACE)
+#define xen_backend_init(function) module_init(function, \
+                                               MODULE_INIT_XEN_BACKEND)
 
 #define block_module_load_one(lib) module_load_one("block-", lib)
 #define ui_module_load_one(lib) module_load_one("ui-", lib)