Merge zizzer:/bk/m5 into zed.eecs.umich.edu:/z/hsul/work/m5/pact05

--HG--
extra : convert_revision : a0a10fccc03edcc5164536ea853788b982e332d7

python/m5/config.py

@@ -897,6 +897,9 @@ class Value(object):
     def __str__(self):
         return str(self._getattr())
 
+    def __len__(self):
+        return len(self._getattr())
+
 # Regular parameter.
 class _Param(object):
     def __init__(self, ptype, *args, **kwargs):