OvmfPkg: Enable 2 different CpuMpPei and CpuDxe drivers

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3918

In OvmfPkgX64 we enable 2 different CpuMpPei and CpuDxe drivers. The
difference between the drivers is the MpInitLib or MpInitLibUp. This is
acomplished by adding a MpInitLibDepLib.

In IntelTdxX64 we enable 2 versions of CpuDxe drivers. It is because PEI
is skipped in IntelTdxX64.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>
Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>

OvmfPkg/IntelTdx/IntelTdxX64.dsc

@@ -57,6 +57,11 @@
 !endif
 !endif
 
+  #
+  # Define the FILE_GUID of CpuDxe for unique-processor version.
+  #
+  DEFINE UP_CPU_DXE_GUID  = 6490f1c5-ebcc-4665-8892-0075b9bb49b7
+
 [BuildOptions]
   GCC:RELEASE_*_*_CC_FLAGS             = -DMDEPKG_NDEBUG
   INTEL:RELEASE_*_*_CC_FLAGS           = /D MDEPKG_NDEBUG
@@ -550,7 +555,30 @@
 
   MdeModulePkg/Universal/EbcDxe/EbcDxe.inf
   UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf
-  UefiCpuPkg/CpuDxe/CpuDxe.inf
+
+  UefiCpuPkg/CpuDxe/CpuDxe.inf {
+    <LibraryClasses>
+      #
+      # Directly use DxeMpInitLib. It depends on DxeMpInitLibMpDepLib which
+      # checks the Protocol of gEfiMpInitLibMpDepProtocolGuid.
+      #
+      MpInitLib|UefiCpuPkg/Library/MpInitLib/DxeMpInitLib.inf
+      NULL|OvmfPkg/Library/MpInitLibDepLib/DxeMpInitLibMpDepLib.inf
+  }
+
+  UefiCpuPkg/CpuDxe/CpuDxe.inf {
+    <Defines>
+      FILE_GUID = $(UP_CPU_DXE_GUID)
+
+    <LibraryClasses>
+      #
+      # Directly use MpInitLibUp. It depends on DxeMpInitLibUpDepLib which
+      # checks the Protocol of gEfiMpInitLibUpDepProtocolGuid.
+      #
+      MpInitLib|UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.inf
+      NULL|OvmfPkg/Library/MpInitLibDepLib/DxeMpInitLibUpDepLib.inf
+  }
+
   OvmfPkg/LocalApicTimerDxe/LocalApicTimerDxe.inf
   OvmfPkg/IncompatiblePciDeviceSupportDxe/IncompatiblePciDeviceSupport.inf
   OvmfPkg/PciHotPlugInitDxe/PciHotPlugInit.inf