diff --git a/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf b/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf
index ab5d87e..712497d 100644
--- a/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf
+++ b/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf
@@ -53,3 +53,6 @@ [Protocols]
 [Depex]
   gEfiCpuIo2ProtocolGuid AND
   gEfiMetronomeArchProtocolGuid
+
+[Pcd]
+  gEfiMdeModulePkgTokenSpaceGuid.PcdPciDisableBusEnumeration ## SOMETIMES_CONSUMES
diff --git a/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c b/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c
index cda9b49..31a8467 100644
--- a/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c
+++ b/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c
@@ -13,6 +13,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
 **/
 
+#include <Library/PcdLib.h>
 #include "PciHostBridge.h"
 #include "PciRootBridge.h"
 #include "PciHostResource.h"
@@ -1496,6 +1497,8 @@ RootBridgeIoConfiguration (
   EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Descriptor;
   EFI_ACPI_END_TAG_DESCRIPTOR       *End;
 
+  if (PcdGetBool (PcdPciDisableBusEnumeration))
+    return EFI_UNSUPPORTED;
   //
   // Get this instance of the Root Bridge.
   //