diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.c b/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.c
index 5afbb82298..2252235bce 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.c
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.c
@@ -284,7 +284,11 @@ PciBusDriverBindingStart (
           );
   }  
 
-  gFullEnumeration = (BOOLEAN) ((SearchHostBridgeHandle (Controller) ? FALSE : TRUE));
+  if (PcdGetBool (PcdPciDisableBusEnumeration)) {
+    gFullEnumeration = FALSE;
+  } else {
+    gFullEnumeration = (BOOLEAN) ((SearchHostBridgeHandle (Controller) ? FALSE : TRUE));
+  }
 
   //
   // Open Device Path Protocol for PCI root bridge
diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf b/MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf
index 34eb672df1..917889ca0a 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf
@@ -108,6 +108,7 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdSrIovSupport
   gEfiMdeModulePkgTokenSpaceGuid.PcdAriSupport
   gEfiMdeModulePkgTokenSpaceGuid.PcdMrIovSupport
+  gEfiMdeModulePkgTokenSpaceGuid.PcdPciDisableBusEnumeration
 
 # [Event]
 #   ##
diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index b627eb101c..51984510d6 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -878,6 +878,9 @@
   ## This PCD specified whether the S.M.A.R.T feature of attached ATA hard disks are enabled.
   gEfiMdeModulePkgTokenSpaceGuid.PcdAtaSmartEnable|TRUE|BOOLEAN|0x00010065
 
+  ## This PCD specifies whether full PCI enumeration is disabled.
+  gEfiMdeModulePkgTokenSpaceGuid.PcdPciDisableBusEnumeration|FALSE|BOOLEAN|0x10000048
+
 [PcdsPatchableInModule]
   ## Specify  memory size with page number for PEI code when 
   #  the feature of Loading Module at Fixed Address is enabled