MdeModulePkg: Notify BeforeExitBootServices in CoreExitBootServices

Location of notification is has been specified in UEFI v2.9. Cc: Gerd Hoffmann <[email protected]> Cc: James Bottomley <[email protected]> Cc: Jiewen Yao <[email protected]> Cc: Tom Lendacky <[email protected]> Cc: Ard Biesheuvel <[email protected]> Cc: "Min M. Xu" <[email protected]> Cc: Andrew Fish <[email protected]> Cc: "Michael D. Kinney" <[email protected]> Cc: Ray Ni <[email protected]> Acked-by: Jiewen Yao <[email protected]> Reviewed-by: Michael D Kinney <[email protected]> Signed-off-by: Dionna Glaze <[email protected]> Message-Id: <[email protected]>
cfernald · Jan 12, 2023 · 9d70d8f · 9d70d8f
1 parent 82b0ee8
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diff --git a/MdeModulePkg/Core/Dxe/DxeMain.inf b/MdeModulePkg/Core/Dxe/DxeMain.inf
@@ -100,6 +100,7 @@
   gEfiEventVirtualAddressChangeGuid             ## CONSUMES             ## Event
   ## CONSUMES   ## Event
   ## PRODUCES   ## Event
+  gEfiEventBeforeExitBootServicesGuid
   gEfiEventExitBootServicesGuid
   gEfiHobMemoryAllocModuleGuid                  ## SOMETIMES_CONSUMES   ## HOB
   gEfiFirmwareFileSystem2Guid                   ## CONSUMES             ## GUID # Used to compare with FV's file system guid and get the FV's file system format

diff --git a/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c b/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
@@ -763,6 +763,12 @@ CoreExitBootServices (
 {
   EFI_STATUS  Status;
 
+  //
+  // Notify other drivers of their last chance to use boot services
+  // before the memory map is terminated.
+  //
+  CoreNotifySignalList (&gEfiEventBeforeExitBootServicesGuid);
+
   //
   // Disable Timer
   //