docs: Adds VT-d testing combinations and lists OS which VT-d works on.

Signed-off-by: Weidong Han <weidong.han@intel.com>

diff --git a/docs/misc/vtd.txt b/docs/misc/vtd.txt
index 1d4e68ce5a42b88e662512e1fb26d4c15b78f5cb..32f1d45b78d86c046c2712d8e1907f5741c7947d 100644 (file)
--- a/docs/misc/vtd.txt
+++ b/docs/misc/vtd.txt
@@ -2,7 +2,7 @@ Title   : How to do PCI Passthrough with VT-d
 Authors : Allen Kay    <allen.m.kay@intel.com>
           Weidong Han  <weidong.han@intel.com>
 Created : October-24-2007
-Updated : December-11-2007
+Updated : December-13-2007
 
 How to turn on VT-d in Xen
 --------------------------
@@ -41,6 +41,22 @@ PCIe-to-PCI bridge have to be assigned to the same domain.
 PCIe devices do not have this restriction.
 
 
+VT-d Works on OS:
+-----------------
+
+1) Host OS: PAE, 64-bit
+2) Guest OS: 32-bit, PAE, 64-bit
+
+Because current Xen doesn't support MSI, for guest OS which uses MSI by default, need to add "pci=nomsi" option on its grub, e.g. RHEL5, FC6.
+
+
+Combinations Tested:
+--------------------
+
+1) 64-bit host: 32/PAE/64 Linux/XP/Win2003/Vista guests
+2) PAE host: 32/PAE Linux/XP/Win2003/Vista guests
+
+
 VT-d Enabled Systems
 --------------------