Index: xen-unstable/tools/python/xen/xend/XendBootloader.py
===================================================================
--- xen-unstable.orig/tools/python/xen/xend/XendBootloader.py
+++ xen-unstable/tools/python/xen/xend/XendBootloader.py
@@ -25,7 +25,7 @@ import pty, termios, fcntl
 from xen.lowlevel import ptsname
 
 def bootloader(blexec, disk, dom, quiet = False, blargs = '', kernel = '',
-               ramdisk = '', kernel_args = ''):
+               ramdisk = '', kernel_args = '', dryrun = False):
     """Run the boot loader executable on the given disk and return a
     config image.
     @param blexec  Binary to use as the boot loader
@@ -91,6 +91,8 @@ def bootloader(blexec, disk, dom, quiet 
             args.append("--args=%s" % kernel_args)
         if quiet:
             args.append("-q")
+        if dryrun:
+            args.append("--dryrun")
         args.append("--output=%s" % fifo)
         if blargs:
             args.extend(shlex.split(blargs))