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-rw-r--r--docs/misc/vtd.txt18
1 files changed, 17 insertions, 1 deletions
diff --git a/docs/misc/vtd.txt b/docs/misc/vtd.txt
index 1d4e68ce5a..32f1d45b78 100644
--- 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
--------------------