]> git.proxmox.com Git - mirror_edk2.git/blobdiff - MdeModulePkg/Core/Dxe/Dispatcher/Dispatcher.c
MdeModulePkg DxeCore: Fix issue to print GUID value %g without pointer
[mirror_edk2.git] / MdeModulePkg / Core / Dxe / Dispatcher / Dispatcher.c
index ba8734e1d6786f4bfe251fe5d40f5608fa5df107..5eee71bb2cd33ce6fd10dd72c183d76db9239b4d 100644 (file)
@@ -26,8 +26,8 @@
   Depex - Dependency Expresion.\r
   SOR   - Schedule On Request - Don't schedule if this bit is set.\r
 \r
-Copyright (c) 2006 - 2008, Intel Corporation. <BR>\r
-All rights reserved. This program and the accompanying materials\r
+Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>\r
+This program and the accompanying materials\r
 are licensed and made available under the terms and conditions of the BSD License\r
 which accompanies this distribution.  The full text of the license may be found at\r
 http://opensource.org/licenses/bsd-license.php\r
@@ -78,6 +78,7 @@ VOID            *mFwVolEventRegistration;
 //\r
 EFI_FV_FILETYPE mDxeFileTypes[] = {\r
   EFI_FV_FILETYPE_DRIVER,\r
+  EFI_FV_FILETYPE_COMBINED_SMM_DXE,\r
   EFI_FV_FILETYPE_COMBINED_PEIM_DRIVER,\r
   EFI_FV_FILETYPE_DXE_CORE,\r
   EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE\r
@@ -90,7 +91,6 @@ typedef struct {
 \r
 FV_FILEPATH_DEVICE_PATH mFvDevicePath;\r
 \r
-\r
 //\r
 // Function Prototypes\r
 //\r
@@ -167,6 +167,7 @@ CoreFvToDevicePath (
                                 EFI_CORE_DRIVER_ENTRY so that the PE image can be\r
                                 read out of the FV at a later time.\r
   @param  DriverName            Name of driver to add to mDiscoveredList.\r
+  @param  Type                  Fv File Type of file to add to mDiscoveredList.\r
 \r
   @retval EFI_SUCCESS           If driver was added to the mDiscoveredList.\r
   @retval EFI_ALREADY_STARTED   The driver has already been started. Only one\r
@@ -178,7 +179,8 @@ EFI_STATUS
 CoreAddToDriverList (\r
   IN  EFI_FIRMWARE_VOLUME2_PROTOCOL   *Fv,\r
   IN  EFI_HANDLE                      FvHandle,\r
-  IN  EFI_GUID                        *DriverName\r
+  IN  EFI_GUID                        *DriverName,\r
+  IN  EFI_FV_FILETYPE                 Type\r
   );\r
 \r
 /**\r
@@ -332,9 +334,14 @@ CoreSchedule (
       DriverEntry->Dependent    = TRUE;\r
       CoreReleaseDispatcherLock ();\r
 \r
+      DEBUG ((DEBUG_DISPATCH, "Schedule FFS(%g) - EFI_SUCCESS\n", DriverName));\r
+      \r
       return EFI_SUCCESS;\r
     }\r
   }\r
+  \r
+  DEBUG ((DEBUG_DISPATCH, "Schedule FFS(%g) - EFI_NOT_FOUND\n", DriverName));\r
+  \r
   return EFI_NOT_FOUND;\r
 }\r
 \r
@@ -385,8 +392,6 @@ CoreTrust (
   return EFI_NOT_FOUND;\r
 }\r
 \r
-\r
-\r
 /**\r
   This is the main Dispatcher for DXE and it exits when there are no more\r
   drivers to run. Drain the mScheduledQueue and load and start a PE\r
@@ -412,6 +417,8 @@ CoreDispatcher (
   LIST_ENTRY                      *Link;\r
   EFI_CORE_DRIVER_ENTRY           *DriverEntry;\r
   BOOLEAN                         ReadyToRun;\r
+  EFI_EVENT                       DxeDispatchEvent;\r
+  \r
 \r
   if (gDispatcherRunning) {\r
     //\r
@@ -422,6 +429,17 @@ CoreDispatcher (
 \r
   gDispatcherRunning = TRUE;\r
 \r
+  Status = CoreCreateEventEx (\r
+             EVT_NOTIFY_SIGNAL,\r
+             TPL_NOTIFY,\r
+             EfiEventEmptyFunction,\r
+             NULL,\r
+             &gEfiEventDxeDispatchGuid,\r
+             &DxeDispatchEvent\r
+             );\r
+  if (EFI_ERROR (Status)) {\r
+    return Status;\r
+  }\r
 \r
   ReturnStatus = EFI_NOT_FOUND;\r
   do {\r
@@ -441,7 +459,8 @@ CoreDispatcher (
       // Untrused to Scheduled it would have already been loaded so we may need to\r
       // skip the LoadImage\r
       //\r
-      if (DriverEntry->ImageHandle == NULL) {\r
+      if (DriverEntry->ImageHandle == NULL && !DriverEntry->IsFvImage) {\r
+        DEBUG ((DEBUG_INFO, "Loading driver %g\n", &DriverEntry->FileName));\r
         Status = CoreLoadImage (\r
                         FALSE,\r
                         gDxeCoreImageHandle,\r
@@ -492,19 +511,43 @@ CoreDispatcher (
 \r
       CoreReleaseDispatcherLock ();\r
 \r
-      CoreReportProgressCodeSpecific (\r
-        FixedPcdGet32(PcdStatusCodeValueDxeDriverBegin),\r
-        DriverEntry->ImageHandle\r
-        );\r
-      Status = CoreStartImage (DriverEntry->ImageHandle, NULL, NULL);\r
-      CoreReportProgressCodeSpecific (\r
-        FixedPcdGet32(PcdStatusCodeValueDxeDriverEnd),\r
-        DriverEntry->ImageHandle\r
-        );\r
\r
+      if (DriverEntry->IsFvImage) {\r
+        //\r
+        // Produce a firmware volume block protocol for FvImage so it gets dispatched from. \r
+        //\r
+        Status = CoreProcessFvImageFile (DriverEntry->Fv, DriverEntry->FvHandle, &DriverEntry->FileName);\r
+      } else {\r
+        REPORT_STATUS_CODE_WITH_EXTENDED_DATA (\r
+          EFI_PROGRESS_CODE,\r
+          (EFI_SOFTWARE_DXE_CORE | EFI_SW_PC_INIT_BEGIN),\r
+          &DriverEntry->ImageHandle,\r
+          sizeof (DriverEntry->ImageHandle)\r
+          );\r
+        ASSERT (DriverEntry->ImageHandle != NULL);\r
+  \r
+        Status = CoreStartImage (DriverEntry->ImageHandle, NULL, NULL);\r
+  \r
+        REPORT_STATUS_CODE_WITH_EXTENDED_DATA (\r
+          EFI_PROGRESS_CODE,\r
+          (EFI_SOFTWARE_DXE_CORE | EFI_SW_PC_INIT_END),\r
+          &DriverEntry->ImageHandle,\r
+          sizeof (DriverEntry->ImageHandle)\r
+          );\r
+      }\r
 \r
       ReturnStatus = EFI_SUCCESS;\r
     }\r
 \r
+    //\r
+    // Now DXE Dispatcher finished one round of dispatch, signal an event group\r
+    // so that SMM Dispatcher get chance to dispatch SMM Drivers which depend\r
+    // on UEFI protocols\r
+    //\r
+    if (!EFI_ERROR (ReturnStatus)) {\r
+      CoreSignalEvent (DxeDispatchEvent);\r
+    }\r
+\r
     //\r
     // Search DriverList for items to place on Scheduled Queue\r
     //\r
@@ -524,10 +567,21 @@ CoreDispatcher (
           CoreInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r
           ReadyToRun = TRUE;\r
         }\r
+      } else {\r
+        if (DriverEntry->Unrequested) {\r
+          DEBUG ((DEBUG_DISPATCH, "Evaluate DXE DEPEX for FFS(%g)\n", &DriverEntry->FileName));\r
+          DEBUG ((DEBUG_DISPATCH, "  SOR                                             = Not Requested\n"));\r
+          DEBUG ((DEBUG_DISPATCH, "  RESULT = FALSE\n"));\r
+        }\r
       }\r
     }\r
   } while (ReadyToRun);\r
 \r
+  //\r
+  // Close DXE dispatch Event\r
+  //\r
+  CoreCloseEvent (DxeDispatchEvent);\r
+\r
   gDispatcherRunning = FALSE;\r
 \r
   return ReturnStatus;\r
@@ -558,12 +612,17 @@ CoreInsertOnScheduledQueueWhileProcessingBeforeAndAfter (
   //\r
   for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r
     DriverEntry = CR(Link, EFI_CORE_DRIVER_ENTRY, Link, EFI_CORE_DRIVER_ENTRY_SIGNATURE);\r
-    if (DriverEntry->Before && DriverEntry->Dependent) {\r
+    if (DriverEntry->Before && DriverEntry->Dependent && DriverEntry != InsertedDriverEntry) {\r
+      DEBUG ((DEBUG_DISPATCH, "Evaluate DXE DEPEX for FFS(%g)\n", &DriverEntry->FileName));\r
+      DEBUG ((DEBUG_DISPATCH, "  BEFORE FFS(%g) = ", &DriverEntry->BeforeAfterGuid));\r
       if (CompareGuid (&InsertedDriverEntry->FileName, &DriverEntry->BeforeAfterGuid)) {\r
         //\r
         // Recursively process BEFORE\r
         //\r
+        DEBUG ((DEBUG_DISPATCH, "TRUE\n  END\n  RESULT = TRUE\n"));\r
         CoreInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r
+      } else {\r
+        DEBUG ((DEBUG_DISPATCH, "FALSE\n  END\n  RESULT = FALSE\n"));\r
       }\r
     }\r
   }\r
@@ -584,12 +643,17 @@ CoreInsertOnScheduledQueueWhileProcessingBeforeAndAfter (
   //\r
   for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r
     DriverEntry = CR(Link, EFI_CORE_DRIVER_ENTRY, Link, EFI_CORE_DRIVER_ENTRY_SIGNATURE);\r
-    if (DriverEntry->After && DriverEntry->Dependent) {\r
+    if (DriverEntry->After && DriverEntry->Dependent && DriverEntry != InsertedDriverEntry) {\r
+      DEBUG ((DEBUG_DISPATCH, "Evaluate DXE DEPEX for FFS(%g)\n", &DriverEntry->FileName));\r
+      DEBUG ((DEBUG_DISPATCH, "  AFTER FFS(%g) = ", &DriverEntry->BeforeAfterGuid));\r
       if (CompareGuid (&InsertedDriverEntry->FileName, &DriverEntry->BeforeAfterGuid)) {\r
         //\r
         // Recursively process AFTER\r
         //\r
+        DEBUG ((DEBUG_DISPATCH, "TRUE\n  END\n  RESULT = TRUE\n"));\r
         CoreInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r
+      } else {\r
+        DEBUG ((DEBUG_DISPATCH, "FALSE\n  END\n  RESULT = FALSE\n"));\r
       }\r
     }\r
   }\r
@@ -625,25 +689,106 @@ FvHasBeenProcessed (
 \r
 /**\r
   Remember that Fv protocol on FvHandle has had it's drivers placed on the\r
-  mDiscoveredList. This fucntion adds entries on the mFvHandleList. Items are\r
-  never removed/freed from the mFvHandleList.\r
+  mDiscoveredList. This fucntion adds entries on the mFvHandleList if new \r
+  entry is different from one in mFvHandleList by checking FvImage Guid.\r
+  Items are never removed/freed from the mFvHandleList.\r
 \r
   @param  FvHandle              The handle of a FV that has been processed\r
 \r
+  @return A point to new added FvHandle entry. If FvHandle with the same FvImage guid\r
+          has been added, NULL will return. \r
+\r
 **/\r
-VOID\r
+KNOWN_HANDLE * \r
 FvIsBeingProcesssed (\r
   IN  EFI_HANDLE    FvHandle\r
   )\r
 {\r
-  KNOWN_HANDLE  *KnownHandle;\r
+  EFI_STATUS                            Status;\r
+  EFI_GUID                              FvNameGuid;\r
+  BOOLEAN                               FvNameGuidIsFound;\r
+  UINT32                                ExtHeaderOffset;\r
+  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL    *Fvb;\r
+  EFI_FIRMWARE_VOLUME_HEADER            *FwVolHeader;\r
+  EFI_FV_BLOCK_MAP_ENTRY                *BlockMap;\r
+  UINTN                                 LbaOffset;\r
+  UINTN                                 Index;\r
+  EFI_LBA                               LbaIndex;\r
+  LIST_ENTRY                            *Link;\r
+  KNOWN_HANDLE                          *KnownHandle;\r
+\r
+  FwVolHeader = NULL;\r
+\r
+  //\r
+  // Get the FirmwareVolumeBlock protocol on that handle\r
+  //\r
+  FvNameGuidIsFound = FALSE;\r
+  Status = CoreHandleProtocol (FvHandle, &gEfiFirmwareVolumeBlockProtocolGuid, (VOID **)&Fvb);\r
+  if (!EFI_ERROR (Status)) {\r
+    //\r
+    // Get the full FV header based on FVB protocol.\r
+    //\r
+    ASSERT (Fvb != NULL);\r
+    Status = GetFwVolHeader (Fvb, &FwVolHeader);\r
+    if (!EFI_ERROR (Status)) {\r
+      ASSERT (FwVolHeader != NULL);\r
+      if (VerifyFvHeaderChecksum (FwVolHeader) && FwVolHeader->ExtHeaderOffset != 0) {\r
+        ExtHeaderOffset = (UINT32) FwVolHeader->ExtHeaderOffset;\r
+        BlockMap  = FwVolHeader->BlockMap;\r
+        LbaIndex  = 0;\r
+        LbaOffset = 0;\r
+        //\r
+        // Find LbaIndex and LbaOffset for FV extension header based on BlockMap.\r
+        //\r
+        while ((BlockMap->NumBlocks != 0) || (BlockMap->Length != 0)) {\r
+          for (Index = 0; Index < BlockMap->NumBlocks && ExtHeaderOffset >= BlockMap->Length; Index ++) {\r
+            ExtHeaderOffset -= BlockMap->Length;\r
+            LbaIndex ++;\r
+          }\r
+          //\r
+          // Check whether FvExtHeader is crossing the multi block range.\r
+          //\r
+          if (Index < BlockMap->NumBlocks) {\r
+            LbaOffset = ExtHeaderOffset;\r
+            break;\r
+          }\r
+          BlockMap++;\r
+        }\r
+        //\r
+        // Read FvNameGuid from FV extension header.\r
+        //\r
+        Status = ReadFvbData (Fvb, &LbaIndex, &LbaOffset, sizeof (FvNameGuid), (UINT8 *) &FvNameGuid);\r
+        if (!EFI_ERROR (Status)) {\r
+          FvNameGuidIsFound = TRUE;\r
+        }\r
+      }\r
+      CoreFreePool (FwVolHeader);\r
+    }\r
+  }\r
 \r
-  KnownHandle = AllocatePool (sizeof (KNOWN_HANDLE));\r
+  if (FvNameGuidIsFound) {\r
+    //\r
+    // Check whether the FV image with the found FvNameGuid has been processed.\r
+    //\r
+    for (Link = mFvHandleList.ForwardLink; Link != &mFvHandleList; Link = Link->ForwardLink) {\r
+      KnownHandle = CR(Link, KNOWN_HANDLE, Link, KNOWN_HANDLE_SIGNATURE);\r
+      if (CompareGuid (&FvNameGuid, &KnownHandle->FvNameGuid)) {\r
+        DEBUG ((EFI_D_ERROR, "FvImage on FvHandle %p and %p has the same FvNameGuid %g.\n", FvHandle, KnownHandle->Handle, &FvNameGuid));\r
+        return NULL;\r
+      }\r
+    }\r
+  }\r
+\r
+  KnownHandle = AllocateZeroPool (sizeof (KNOWN_HANDLE));\r
   ASSERT (KnownHandle != NULL);\r
 \r
   KnownHandle->Signature = KNOWN_HANDLE_SIGNATURE;\r
   KnownHandle->Handle = FvHandle;\r
+  if (FvNameGuidIsFound) {\r
+    CopyGuid (&KnownHandle->FvNameGuid, &FvNameGuid);\r
+  }\r
   InsertTailList (&mFvHandleList, &KnownHandle->Link);\r
+  return KnownHandle;\r
 }\r
 \r
 \r
@@ -684,9 +829,7 @@ CoreFvToDevicePath (
     // Build a device path to the file in the FV to pass into gBS->LoadImage\r
     //\r
     EfiInitializeFwVolDevicepathNode (&mFvDevicePath.File, DriverName);\r
-    mFvDevicePath.End.Type = EFI_END_ENTIRE_DEVICE_PATH;\r
-    mFvDevicePath.End.SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;\r
-    SetDevicePathNodeLength (&mFvDevicePath.End, sizeof (EFI_DEVICE_PATH_PROTOCOL));\r
+    SetDevicePathEndNode (&mFvDevicePath.End);\r
 \r
     FileNameDevicePath = AppendDevicePath (\r
                             FvDevicePath,\r
@@ -712,6 +855,7 @@ CoreFvToDevicePath (
                                 EFI_CORE_DRIVER_ENTRY so that the PE image can be\r
                                 read out of the FV at a later time.\r
   @param  DriverName            Name of driver to add to mDiscoveredList.\r
+  @param  Type                  Fv File Type of file to add to mDiscoveredList.\r
 \r
   @retval EFI_SUCCESS           If driver was added to the mDiscoveredList.\r
   @retval EFI_ALREADY_STARTED   The driver has already been started. Only one\r
@@ -723,7 +867,8 @@ EFI_STATUS
 CoreAddToDriverList (\r
   IN  EFI_FIRMWARE_VOLUME2_PROTOCOL   *Fv,\r
   IN  EFI_HANDLE                      FvHandle,\r
-  IN  EFI_GUID                        *DriverName\r
+  IN  EFI_GUID                        *DriverName,\r
+  IN  EFI_FV_FILETYPE                 Type\r
   )\r
 {\r
   EFI_CORE_DRIVER_ENTRY               *DriverEntry;\r
@@ -735,6 +880,9 @@ CoreAddToDriverList (
   //\r
   DriverEntry = AllocateZeroPool (sizeof (EFI_CORE_DRIVER_ENTRY));\r
   ASSERT (DriverEntry != NULL);\r
+  if (Type == EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE) {\r
+    DriverEntry->IsFvImage = TRUE;\r
+  }\r
 \r
   DriverEntry->Signature        = EFI_CORE_DRIVER_ENTRY_SIGNATURE;\r
   CopyGuid (&DriverEntry->FileName, DriverName);\r
@@ -758,7 +906,7 @@ CoreAddToDriverList (
   Check if a FV Image type file (EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE) is\r
   described by a EFI_HOB_FIRMWARE_VOLUME2 Hob.\r
 \r
-  @param  FvHandle              The handle which FVB protocol installed on.\r
+  @param  FvNameGuid            The FV image guid specified.\r
   @param  DriverName            The driver guid specified.\r
 \r
   @retval TRUE                  This file is found in a EFI_HOB_FIRMWARE_VOLUME2\r
@@ -768,7 +916,7 @@ CoreAddToDriverList (
 **/\r
 BOOLEAN\r
 FvFoundInHobFv2 (\r
-  IN  EFI_HANDLE                      FvHandle,\r
+  IN  CONST EFI_GUID                  *FvNameGuid,\r
   IN  CONST EFI_GUID                  *DriverName\r
   )\r
 {\r
@@ -777,7 +925,11 @@ FvFoundInHobFv2 (
   HobFv2.Raw = GetHobList ();\r
 \r
   while ((HobFv2.Raw = GetNextHob (EFI_HOB_TYPE_FV2, HobFv2.Raw)) != NULL) {\r
-    if (CompareGuid (DriverName, &HobFv2.FirmwareVolume2->FileName)) {\r
+    //\r
+    // Compare parent FvNameGuid and FileGuid both.\r
+    //\r
+    if (CompareGuid (DriverName, &HobFv2.FirmwareVolume2->FileName) &&\r
+        CompareGuid (FvNameGuid, &HobFv2.FirmwareVolume2->FvName)) {\r
       return TRUE;\r
     }\r
     HobFv2.Raw = GET_NEXT_HOB (HobFv2);\r
@@ -815,6 +967,7 @@ CoreProcessFvImageFile (
   UINTN                               BufferSize;\r
   EFI_FIRMWARE_VOLUME_HEADER          *FvHeader;\r
   UINT32                              FvAlignment;\r
+  EFI_DEVICE_PATH_PROTOCOL            *FvFileDevicePath;\r
 \r
   //\r
   // Read the first (and only the first) firmware volume section\r
@@ -835,40 +988,79 @@ CoreProcessFvImageFile (
                  &AuthenticationStatus\r
                  );\r
   if (!EFI_ERROR (Status)) {\r
+     //\r
+    // Evaluate the authentication status of the Firmware Volume through\r
+    // Security Architectural Protocol\r
+    //\r
+    if (gSecurity != NULL) {\r
+      FvFileDevicePath = CoreFvToDevicePath (Fv, FvHandle, DriverName);\r
+      Status = gSecurity->FileAuthenticationState (\r
+                            gSecurity,\r
+                            AuthenticationStatus,\r
+                            FvFileDevicePath\r
+                            );\r
+      if (FvFileDevicePath != NULL) {\r
+        FreePool (FvFileDevicePath);\r
+      }\r
+\r
+      if (Status != EFI_SUCCESS) {\r
+        //\r
+        // Security check failed. The firmware volume should not be used for any purpose.\r
+        //\r
+        if (Buffer != NULL) {\r
+          FreePool (Buffer);\r
+        }\r
+        return Status;\r
+      }\r
+    }\r
+\r
     //\r
     // FvImage should be at its required alignment.\r
     //\r
     FvHeader = (EFI_FIRMWARE_VOLUME_HEADER *) Buffer;\r
-    FvAlignment = 1 << ((FvHeader->Attributes & EFI_FVB2_ALIGNMENT) >> 16);\r
-    //\r
-    // FvAlignment must be more than 8 bytes required by FvHeader structure.\r
     //\r
-    if (FvAlignment < 8) {\r
-      FvAlignment = 8;\r
-    }\r
+    // If EFI_FVB2_WEAK_ALIGNMENT is set in the volume header then the first byte of the volume\r
+    // can be aligned on any power-of-two boundary. A weakly aligned volume can not be moved from\r
+    // its initial linked location and maintain its alignment.\r
     //\r
-    // Allocate the aligned buffer for the FvImage.\r
-    //\r
-    AlignedBuffer = AllocateAlignedPages (EFI_SIZE_TO_PAGES (BufferSize), (UINTN) FvAlignment);\r
-    if (AlignedBuffer == NULL) {\r
-      Status = EFI_OUT_OF_RESOURCES;\r
-    } else {\r
+    if ((FvHeader->Attributes & EFI_FVB2_WEAK_ALIGNMENT) != EFI_FVB2_WEAK_ALIGNMENT) {\r
       //\r
-      // Move FvImage into the aligned buffer and release the original buffer.\r
+      // Get FvHeader alignment\r
       //\r
-      CopyMem (AlignedBuffer, Buffer, BufferSize);\r
-      CoreFreePool (Buffer);\r
-      Buffer = NULL;\r
+      FvAlignment = 1 << ((FvHeader->Attributes & EFI_FVB2_ALIGNMENT) >> 16);\r
       //\r
-      // Produce a FVB protocol for the file\r
+      // FvAlignment must be greater than or equal to 8 bytes of the minimum FFS alignment value.\r
       //\r
-      Status = ProduceFVBProtocolOnBuffer (\r
-                (EFI_PHYSICAL_ADDRESS) (UINTN) AlignedBuffer,\r
-                (UINT64)BufferSize,\r
-                FvHandle,\r
-                NULL\r
-                );\r
+      if (FvAlignment < 8) {\r
+        FvAlignment = 8;\r
+      }\r
+      //\r
+      // Allocate the aligned buffer for the FvImage.\r
+      //\r
+      AlignedBuffer = AllocateAlignedPages (EFI_SIZE_TO_PAGES (BufferSize), (UINTN) FvAlignment);\r
+      if (AlignedBuffer == NULL) {\r
+        FreePool (Buffer);\r
+        return EFI_OUT_OF_RESOURCES;\r
+      } else {\r
+        //\r
+        // Move FvImage into the aligned buffer and release the original buffer.\r
+        //\r
+        CopyMem (AlignedBuffer, Buffer, BufferSize);\r
+        FvHeader = (EFI_FIRMWARE_VOLUME_HEADER *) AlignedBuffer;\r
+        CoreFreePool (Buffer);\r
+        Buffer = NULL;\r
+      }\r
     }\r
+    //\r
+    // Produce a FVB protocol for the file\r
+    //\r
+    Status = ProduceFVBProtocolOnBuffer (\r
+              (EFI_PHYSICAL_ADDRESS) (UINTN) FvHeader,\r
+              (UINT64)BufferSize,\r
+              FvHandle,\r
+              AuthenticationStatus,\r
+              NULL\r
+              );\r
   }\r
 \r
   if (EFI_ERROR (Status)) {\r
@@ -914,7 +1106,6 @@ CoreFwVolEventProtocolNotify (
 {\r
   EFI_STATUS                    Status;\r
   EFI_STATUS                    GetNextFileStatus;\r
-  EFI_STATUS                    SecurityStatus;\r
   EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;\r
   EFI_DEVICE_PATH_PROTOCOL      *FvDevicePath;\r
   EFI_HANDLE                    FvHandle;\r
@@ -931,7 +1122,10 @@ CoreFwVolEventProtocolNotify (
   LIST_ENTRY                    *Link;\r
   UINT32                        AuthenticationStatus;\r
   UINTN                         SizeOfBuffer;\r
+  VOID                          *DepexBuffer;\r
+  KNOWN_HANDLE                  *KnownHandle;\r
 \r
+  FvHandle = NULL;\r
 \r
   while (TRUE) {\r
     BufferSize = sizeof (EFI_HANDLE);\r
@@ -956,25 +1150,22 @@ CoreFwVolEventProtocolNotify (
       continue;\r
     }\r
 \r
-    Status = CoreHandleProtocol (FvHandle, &gEfiFirmwareVolumeDispatchProtocolGuid, (VOID **)&Fv);\r
-    if (EFI_ERROR (Status)) {\r
+    //\r
+    // Since we are about to process this Fv mark it as processed.\r
+    //\r
+    KnownHandle = FvIsBeingProcesssed (FvHandle);\r
+    if (KnownHandle == NULL) {\r
       //\r
-      // If no dispatch protocol then skip, but do not marked as being processed as it\r
-      // may show up later.\r
+      // The FV with the same FV name guid has already been processed. \r
+      // So lets skip it!\r
       //\r
       continue;\r
     }\r
 \r
-    //\r
-    // Since we are about to process this Fv mark it as processed.\r
-    //\r
-    FvIsBeingProcesssed (FvHandle);\r
-\r
     Status = CoreHandleProtocol (FvHandle, &gEfiFirmwareVolume2ProtocolGuid, (VOID **)&Fv);\r
-    if (EFI_ERROR (Status)) {\r
+    if (EFI_ERROR (Status) || Fv == NULL) {\r
       //\r
-      // The Handle has a FirmwareVolumeDispatch protocol and should also contiain\r
-      // a FirmwareVolume protocol thus we should never get here.\r
+      // FvHandle must have Firmware Volume2 protocol thus we should never get here.\r
       //\r
       ASSERT (FALSE);\r
       continue;\r
@@ -988,24 +1179,6 @@ CoreFwVolEventProtocolNotify (
       continue;\r
     }\r
 \r
-    //\r
-    // Evaluate the authentication status of the Firmware Volume through\r
-    // Security Architectural Protocol\r
-    //\r
-    if (gSecurity != NULL) {\r
-      SecurityStatus = gSecurity->FileAuthenticationState (\r
-                                    gSecurity,\r
-                                    0,\r
-                                    FvDevicePath\r
-                                    );\r
-      if (SecurityStatus != EFI_SUCCESS) {\r
-        //\r
-        // Security check failed. The firmware volume should not be used for any purpose.\r
-        //\r
-        continue;\r
-      }\r
-    }\r
-\r
     //\r
     // Discover Drivers in FV and add them to the Discovered Driver List.\r
     // Process EFI_FV_FILETYPE_DRIVER type and then EFI_FV_FILETYPE_COMBINED_PEIM_DRIVER\r
@@ -1039,9 +1212,7 @@ CoreFwVolEventProtocolNotify (
                 // be initialized completely.\r
                 //\r
                 EfiInitializeFwVolDevicepathNode (&mFvDevicePath.File, &NameGuid);\r
-                mFvDevicePath.End.Type = EFI_END_ENTIRE_DEVICE_PATH;\r
-                mFvDevicePath.End.SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;\r
-                SetDevicePathNodeLength (&mFvDevicePath.End, sizeof (EFI_DEVICE_PATH_PROTOCOL));\r
+                SetDevicePathEndNode (&mFvDevicePath.End);\r
 \r
                 gDxeCoreLoadedImage->FilePath = DuplicateDevicePath (\r
                                                   (EFI_DEVICE_PATH_PROTOCOL *)&mFvDevicePath\r
@@ -1054,20 +1225,64 @@ CoreFwVolEventProtocolNotify (
             // Check if this EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE file has already\r
             // been extracted.\r
             //\r
-            if (FvFoundInHobFv2 (FvHandle, &NameGuid)) {\r
+            if (FvFoundInHobFv2 (&KnownHandle->FvNameGuid, &NameGuid)) {\r
               continue;\r
             }\r
+\r
             //\r
-            // Found a firmware volume image. Produce a firmware volume block\r
-            // protocol for it so it gets dispatched from. This is usually a\r
-            // capsule.\r
+            // Check if this EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE file has SMM depex section.\r
             //\r
-            CoreProcessFvImageFile (Fv, FvHandle, &NameGuid);\r
+            DepexBuffer  = NULL;\r
+            SizeOfBuffer = 0;\r
+            Status = Fv->ReadSection (\r
+                           Fv,\r
+                           &NameGuid,\r
+                           EFI_SECTION_SMM_DEPEX,\r
+                           0,\r
+                           &DepexBuffer,\r
+                           &SizeOfBuffer,\r
+                           &AuthenticationStatus\r
+                           );\r
+            if (!EFI_ERROR (Status)) {\r
+              //\r
+              // If SMM depex section is found, this FV image is invalid to be supported.\r
+              // ASSERT FALSE to report this FV image.  \r
+              //\r
+              FreePool (DepexBuffer);\r
+              ASSERT (FALSE);\r
+            }\r
+\r
+            //\r
+            // Check if this EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE file has DXE depex section.\r
+            //\r
+            DepexBuffer  = NULL;\r
+            SizeOfBuffer = 0;\r
+            Status = Fv->ReadSection (\r
+                           Fv,\r
+                           &NameGuid,\r
+                           EFI_SECTION_DXE_DEPEX,\r
+                           0,\r
+                           &DepexBuffer,\r
+                           &SizeOfBuffer,\r
+                           &AuthenticationStatus\r
+                           );\r
+            if (EFI_ERROR (Status)) {\r
+              //\r
+              // If no depex section, produce a firmware volume block protocol for it so it gets dispatched from. \r
+              //\r
+              CoreProcessFvImageFile (Fv, FvHandle, &NameGuid);\r
+            } else {\r
+              //\r
+              // If depex section is found, this FV image will be dispatched until its depex is evaluated to TRUE.\r
+              //\r
+              FreePool (DepexBuffer);\r
+              CoreAddToDriverList (Fv, FvHandle, &NameGuid, Type);\r
+            }\r
           } else {\r
             //\r
             // Transition driver from Undiscovered to Discovered state\r
             //\r
-            CoreAddToDriverList (Fv, FvHandle, &NameGuid);\r
+            CoreAddToDriverList (Fv, FvHandle, &NameGuid, Type);\r
           }\r
         }\r
       } while (!EFI_ERROR (GetNextFileStatus));\r
@@ -1097,23 +1312,24 @@ CoreFwVolEventProtocolNotify (
     // drivers not in the current FV and these must be skipped since the a priori list\r
     // is only valid for the FV that it resided in.\r
     //\r
-    CoreAcquireDispatcherLock ();\r
 \r
     for (Index = 0; Index < AprioriEntryCount; Index++) {\r
       for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r
         DriverEntry = CR(Link, EFI_CORE_DRIVER_ENTRY, Link, EFI_CORE_DRIVER_ENTRY_SIGNATURE);\r
         if (CompareGuid (&DriverEntry->FileName, &AprioriFile[Index]) &&\r
             (FvHandle == DriverEntry->FvHandle)) {\r
+          CoreAcquireDispatcherLock ();\r
           DriverEntry->Dependent = FALSE;\r
           DriverEntry->Scheduled = TRUE;\r
           InsertTailList (&mScheduledQueue, &DriverEntry->ScheduledLink);\r
+          CoreReleaseDispatcherLock ();\r
+          DEBUG ((DEBUG_DISPATCH, "Evaluate DXE DEPEX for FFS(%g)\n", &DriverEntry->FileName));\r
+          DEBUG ((DEBUG_DISPATCH, "  RESULT = TRUE (Apriori)\n"));\r
           break;\r
         }\r
       }\r
     }\r
 \r
-    CoreReleaseDispatcherLock ();\r
-\r
     //\r
     // Free data allocated by Fv->ReadSection ()\r
     //\r
@@ -1133,13 +1349,12 @@ CoreInitializeDispatcher (
   VOID\r
   )\r
 {\r
-  mFwVolEvent = CoreCreateProtocolNotifyEvent (\r
+  mFwVolEvent = EfiCreateProtocolNotifyEvent (\r
                   &gEfiFirmwareVolume2ProtocolGuid,\r
                   TPL_CALLBACK,\r
                   CoreFwVolEventProtocolNotify,\r
                   NULL,\r
-                  &mFwVolEventRegistration,\r
-                  TRUE\r
+                  &mFwVolEventRegistration\r
                   );\r
 }\r
 \r