diff --git a/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c b/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c
index 738fdce9a1..cd09b2781e 100644
--- a/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c
+++ b/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c
@@ -723,10 +723,10 @@ PciInitialization (
   // Bus 0, Device 1, Function 0 - PCI to ISA Bridge
   //
   PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x3c), 0x00);
-  PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x60), 0x0b);
-  PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x61), 0x09);
-  PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x62), 0x0b);
-  PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x63), 0x09);
+  PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x60), 0x0b); // LNKA routing target
+  PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x61), 0x0b); // LNKB routing target
+  PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x62), 0x0a); // LNKC routing target
+  PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x63), 0x0a); // LNKD routing target
 
   //
   // Bus 0, Device 1, Function 1 - IDE Controller
@@ -737,8 +737,8 @@ PciInitialization (
   //
   // Bus 0, Device 1, Function 3 - Power Managment Controller
   //
-  PciWrite8 (PCI_LIB_ADDRESS (0, 1, 3, 0x3c), 0x0b);
-  PciWrite8 (PCI_LIB_ADDRESS (0, 1, 3, 0x3d), 0x01);
+  PciWrite8 (PCI_LIB_ADDRESS (0, 1, 3, 0x3c), 0x09);
+  PciWrite8 (PCI_LIB_ADDRESS (0, 1, 3, 0x3d), 0x01); // INTA
 
   //
   // Bus 0, Device 2, Function 0 - Video Controller
@@ -748,14 +748,14 @@ PciInitialization (
   //
   // Bus 0, Device 3, Function 0 - Network Controller
   //
-  PciWrite8 (PCI_LIB_ADDRESS (0, 3, 0, 0x3c), 0x0b);
-  PciWrite8 (PCI_LIB_ADDRESS (0, 3, 0, 0x3d), 0x01);
+  PciWrite8 (PCI_LIB_ADDRESS (0, 3, 0, 0x3c), 0x0a);
+  PciWrite8 (PCI_LIB_ADDRESS (0, 3, 0, 0x3d), 0x01); // INTA (-> LNKC)
 
   //
   // Bus 0, Device 5, Function 0 - RAM Memory
   //
-  PciWrite8 (PCI_LIB_ADDRESS (0, 5, 0, 0x3c), 0x09);
-  PciWrite8 (PCI_LIB_ADDRESS (0, 5, 0, 0x3d), 0x01);
+  PciWrite8 (PCI_LIB_ADDRESS (0, 5, 0, 0x3c), 0x0b);
+  PciWrite8 (PCI_LIB_ADDRESS (0, 5, 0, 0x3d), 0x01); // INTA (-> LNKA)
 }