3 files changed, 7 insertions, 0 deletions
diff --git a/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c b/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c
index 07fa981..8758d7c 100644
--- a/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c
+++ b/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c
@@ -10,6 +10,7 @@
 #include <PiDxe.h>
 
 #include <IndustryStandard/Pci.h>
+#include <IndustryStandard/Q35MchIch9.h>
 
 #include <Protocol/PciHostBridgeResourceAllocation.h>
 #include <Protocol/PciRootBridgeIo.h>
@@ -151,6 +152,8 @@ PciHostBridgeGetRootBridges (
         Attributes,
         Attributes,
         AllocationAttributes,
+        FALSE,
+        PcdGet16 (PcdOvmfHostBridgePciDevId) != INTEL_Q35_MCH_DEVICE_ID,
         (UINT8) LastRootBridgeNumber,
         (UINT8) (RootBridgeNumber - 1),
         &Io,
@@ -176,6 +179,8 @@ PciHostBridgeGetRootBridges (
     Attributes,
     Attributes,
     AllocationAttributes,
+    FALSE,
+    PcdGet16 (PcdOvmfHostBridgePciDevId) != INTEL_Q35_MCH_DEVICE_ID,
     (UINT8) LastRootBridgeNumber,
     PCI_MAX_BUS,
     &Io,
diff --git a/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.inf b/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.inf
index 7944f94..7245826 100644
--- a/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.inf
+++ b/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.inf
@@ -50,4 +50,5 @@
   gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio32Size
   gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio64Base
   gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio64Size
+  gUefiOvmfPkgTokenSpaceGuid.PcdOvmfHostBridgePciDevId
   gEfiMdeModulePkgTokenSpaceGuid.PcdPciDisableBusEnumeration
diff --git a/OvmfPkg/Library/PciHostBridgeLib/XenSupport.c b/OvmfPkg/Library/PciHostBridgeLib/XenSupport.c
index 5dfeba0..9ef39f0 100644
--- a/OvmfPkg/Library/PciHostBridgeLib/XenSupport.c
+++ b/OvmfPkg/Library/PciHostBridgeLib/XenSupport.c
@@ -456,6 +456,7 @@ ScanForRootBridges (
       ASSERT (RootBridges != NULL);
       PciHostBridgeUtilityInitRootBridge (
         Attributes, Attributes, 0,
+        FALSE, PcdGet16 (PcdOvmfHostBridgePciDevId) != INTEL_Q35_MCH_DEVICE_ID,
         (UINT8) PrimaryBus, (UINT8) SubBus,
         &Io, &Mem, &MemAbove4G, &mNonExistAperture, &mNonExistAperture,
         &RootBridges[*NumberOfRootBridges]