[RFC PATCH v2 40/44] MdePkg: Add a finalization function to the CPU protocol

["Lendacky, Thomas" <thomas.lendacky@amd.com>]

From: Tom Lendacky <thomas.lendacky@amd.com>

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198

Expand the CPU protocol to include a finalization function that can be
used to perform any final AP processing or AP environment setup before
transferring control over to an OS.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
---
 MdePkg/Include/Protocol/Cpu.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/MdePkg/Include/Protocol/Cpu.h b/MdePkg/Include/Protocol/Cpu.h
index e392f4cd9a13..1603797edd1c 100644
--- a/MdePkg/Include/Protocol/Cpu.h
+++ b/MdePkg/Include/Protocol/Cpu.h
@@ -258,6 +258,22 @@ EFI_STATUS
   );
 
 
+/**
+  This function is used to perform any CPU finalization operations needed
+  before exiting boot services.
+
+  @param  This             The EFI_CPU_ARCH_PROTOCOL instance.
+
+  @return None
+
+**/
+typedef
+VOID
+(EFIAPI *EFI_CPU_FINALIZE)(
+  IN EFI_CPU_ARCH_PROTOCOL              *This
+  );
+
+
 ///
 /// The EFI_CPU_ARCH_PROTOCOL is used to abstract processor-specific functions from the DXE
 /// Foundation. This includes flushing caches, enabling and disabling interrupts, hooking interrupt
@@ -287,6 +303,8 @@ struct _EFI_CPU_ARCH_PROTOCOL {
   /// a read-only field.
   ///
   UINT32                              DmaBufferAlignment;
+
+  EFI_CPU_FINALIZE                    Finalize;
 };
 
 extern EFI_GUID gEfiCpuArchProtocolGuid;
-- 
2.17.1