diff --git a/arch/s390/hypfs/hypfs.h b/arch/s390/hypfs/hypfs.h
new file mode 100644
index 0000000..eecde50
--- /dev/null
+++ b/arch/s390/hypfs/hypfs.h
@@ -0,0 +1,76 @@
+/*
+ *    Hypervisor filesystem for Linux on s390.
+ *
+ *    Copyright IBM Corp. 2006
+ *    Author(s): Michael Holzheu <holzheu@de.ibm.com>
+ */
+
+#ifndef _HYPFS_H_
+#define _HYPFS_H_
+
+#include <linux/fs.h>
+#include <linux/types.h>
+#include <linux/debugfs.h>
+#include <linux/workqueue.h>
+#include <linux/kref.h>
+#include <asm/hypfs.h>
+
+#define REG_FILE_MODE    0440
+#define UPDATE_FILE_MODE 0220
+#define DIR_MODE         0550
+
+extern struct dentry *hypfs_mkdir(struct dentry *parent, const char *name);
+
+extern struct dentry *hypfs_create_u64(struct dentry *dir, const char *name,
+				       __u64 value);
+
+extern struct dentry *hypfs_create_str(struct dentry *dir, const char *name,
+				       char *string);
+
+/* LPAR Hypervisor */
+extern int hypfs_diag_init(void);
+extern void hypfs_diag_exit(void);
+extern int hypfs_diag_create_files(struct dentry *root);
+
+/* VM Hypervisor */
+extern int hypfs_vm_init(void);
+extern void hypfs_vm_exit(void);
+extern int hypfs_vm_create_files(struct dentry *root);
+
+/* VM diagnose 0c */
+int hypfs_diag0c_init(void);
+void hypfs_diag0c_exit(void);
+
+/* Set Partition-Resource Parameter */
+int hypfs_sprp_init(void);
+void hypfs_sprp_exit(void);
+
+/* debugfs interface */
+struct hypfs_dbfs_file;
+
+struct hypfs_dbfs_data {
+	void			*buf;
+	void			*buf_free_ptr;
+	size_t			size;
+	struct hypfs_dbfs_file	*dbfs_file;
+};
+
+struct hypfs_dbfs_file {
+	const char	*name;
+	int		(*data_create)(void **data, void **data_free_ptr,
+				       size_t *size);
+	void		(*data_free)(const void *buf_free_ptr);
+	long		(*unlocked_ioctl) (struct file *, unsigned int,
+					   unsigned long);
+
+	/* Private data for hypfs_dbfs.c */
+	struct mutex		lock;
+	struct dentry		*dentry;
+};
+
+extern int hypfs_dbfs_init(void);
+extern void hypfs_dbfs_exit(void);
+extern int hypfs_dbfs_create_file(struct hypfs_dbfs_file *df);
+extern void hypfs_dbfs_remove_file(struct hypfs_dbfs_file *df);
+
+#endif /* _HYPFS_H_ */