Index: xen-3.2-testing/xen/arch/x86/x86_64/entry.S
===================================================================
--- xen-3.2-testing.orig/xen/arch/x86/x86_64/entry.S
+++ xen-3.2-testing/xen/arch/x86/x86_64/entry.S
@@ -93,6 +93,7 @@ failsafe_callback:
         jnc   1f
         orb   $TBF_INTERRUPT,TRAPBOUNCE_flags(%rdx)
 1:      call  create_bounce_frame
+        andl  $~X86_EFLAGS_DF,UREGS_eflags(%rsp)
         jmp   test_all_events
 .previous
 .section __pre_ex_table,"a"