Index: /trunk/src/VBox/Devices/Bus/DevIommuAmd.cpp
===================================================================
--- /trunk/src/VBox/Devices/Bus/DevIommuAmd.cpp	(revision 84313)
+++ /trunk/src/VBox/Devices/Bus/DevIommuAmd.cpp	(revision 84314)
@@ -483,4 +483,16 @@
 /** The IOTLB entry magic. */
 #define IOMMU_IOTLBE_MAGIC                          0x10acce55
+/** The device-specific feature major revision. */
+#define IOMMU_DEVSPEC_FEAT_MAJOR_VERSION            0x1
+/** The device-specific feature minor revision. */
+#define IOMMU_DEVSPEC_FEAT_MINOR_VERSION            0x0
+/** The device-specific control major revision. */
+#define IOMMU_DEVSPEC_CTRL_MAJOR_VERSION            0x1
+/** The device-specific control minor revision. */
+#define IOMMU_DEVSPEC_CTRL_MINOR_VERSION            0x0
+/** The device-specific status major revision. */
+#define IOMMU_DEVSPEC_STATUS_MAJOR_VERSION          0x1
+/** The device-specific status minor revision. */
+#define IOMMU_DEVSPEC_STATUS_MINOR_VERSION          0x0
 /** @} */
 
@@ -5809,6 +5821,14 @@
 
     pThis->DevSpecificFeat.u64   = 0;
-    pThis->DevSpecificCtrl.u64   = 0;
+    pThis->DevSpecificFeat.n.u4RevMajor = IOMMU_DEVSPEC_FEAT_MAJOR_VERSION;
+    pThis->DevSpecificFeat.n.u4RevMinor = IOMMU_DEVSPEC_FEAT_MINOR_VERSION;
+
+    pThis->DevSpecificCtrl.u64 = 0;
+    pThis->DevSpecificCtrl.n.u4RevMajor = IOMMU_DEVSPEC_CTRL_MAJOR_VERSION;
+    pThis->DevSpecificCtrl.n.u4RevMinor = IOMMU_DEVSPEC_CTRL_MINOR_VERSION;
+
     pThis->DevSpecificStatus.u64 = 0;
+    pThis->DevSpecificStatus.n.u4RevMajor = IOMMU_DEVSPEC_STATUS_MAJOR_VERSION;
+    pThis->DevSpecificStatus.n.u4RevMinor = IOMMU_DEVSPEC_STATUS_MINOR_VERSION;
 
     /*