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diff --git a/qemu/include/qapi/visitor-impl.h b/qemu/include/qapi/visitor-impl.h
new file mode 100644
index 000000000..f4a2f746c
--- /dev/null
+++ b/qemu/include/qapi/visitor-impl.h
@@ -0,0 +1,67 @@
+/*
+ * Core Definitions for QAPI Visitor implementations
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * Author: Paolo Bonizni <pbonzini@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ *
+ */
+#ifndef QAPI_VISITOR_IMPL_H
+#define QAPI_VISITOR_IMPL_H
+
+#include "qapi/error.h"
+#include "qapi/visitor.h"
+
+struct Visitor
+{
+    /* Must be set */
+    void (*start_struct)(Visitor *v, void **obj, const char *kind,
+                         const char *name, size_t size, Error **errp);
+    void (*end_struct)(Visitor *v, Error **errp);
+
+    void (*start_implicit_struct)(Visitor *v, void **obj, size_t size,
+                                  Error **errp);
+    void (*end_implicit_struct)(Visitor *v, Error **errp);
+
+    void (*start_list)(Visitor *v, const char *name, Error **errp);
+    GenericList *(*next_list)(Visitor *v, GenericList **list, Error **errp);
+    void (*end_list)(Visitor *v, Error **errp);
+
+    void (*type_enum)(Visitor *v, int *obj, const char * const strings[],
+                      const char *kind, const char *name, Error **errp);
+    void (*get_next_type)(Visitor *v, int *kind, const int *qobjects,
+                          const char *name, Error **errp);
+
+    void (*type_int)(Visitor *v, int64_t *obj, const char *name, Error **errp);
+    void (*type_bool)(Visitor *v, bool *obj, const char *name, Error **errp);
+    void (*type_str)(Visitor *v, char **obj, const char *name, Error **errp);
+    void (*type_number)(Visitor *v, double *obj, const char *name,
+                        Error **errp);
+
+    /* May be NULL */
+    void (*optional)(Visitor *v, bool *present, const char *name,
+                     Error **errp);
+
+    void (*type_uint8)(Visitor *v, uint8_t *obj, const char *name, Error **errp);
+    void (*type_uint16)(Visitor *v, uint16_t *obj, const char *name, Error **errp);
+    void (*type_uint32)(Visitor *v, uint32_t *obj, const char *name, Error **errp);
+    void (*type_uint64)(Visitor *v, uint64_t *obj, const char *name, Error **errp);
+    void (*type_int8)(Visitor *v, int8_t *obj, const char *name, Error **errp);
+    void (*type_int16)(Visitor *v, int16_t *obj, const char *name, Error **errp);
+    void (*type_int32)(Visitor *v, int32_t *obj, const char *name, Error **errp);
+    void (*type_int64)(Visitor *v, int64_t *obj, const char *name, Error **errp);
+    /* visit_type_size() falls back to (*type_uint64)() if type_size is unset */
+    void (*type_size)(Visitor *v, uint64_t *obj, const char *name, Error **errp);
+    bool (*start_union)(Visitor *v, bool data_present, Error **errp);
+    void (*end_union)(Visitor *v, bool data_present, Error **errp);
+};
+
+void input_type_enum(Visitor *v, int *obj, const char * const strings[],
+                     const char *kind, const char *name, Error **errp);
+void output_type_enum(Visitor *v, int *obj, const char * const strings[],
+                      const char *kind, const char *name, Error **errp);
+
+#endif