Now we have extended the patch to support x86_64 domU as well. The

Now we have extended the patch to support x86_64 domU as well. The
shadow mode survived with the domU running lmbench, ltp, kernbench, etc.
by running a script that enables shadow LOGDIRTY mode, CLEAN, and
disables at 5-second intervals in an infinite loop. Thanks Ian for
providing the Python script. Tested x86 domU and VMX domains as well.
Big ones are all new, and are used for 64-bit only. Please apply.

We also verified that shadow_64.c and shadow_public.c could be built for
x86 and that they worked fine there. We can provide a small patch that
does it (once the code is in ;-).

Signed-off-by: Jun Nakajima <jun.nakajima@intel.com>
Signed-off-by: Chengyuan Li <chengyuan.li@intel.com>
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>