[PATCH v1 1/1] IntelSiliconPkg/ShadowMicrocodePei: Add PCD for shadowing all microcode.

["Aaron Li" <aaron.li@intel.com>]

This patch is to add a PCD PcdShadowAllMicrocode to support shadowing
all microcode patch to memory.

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2891

Signed-off-by: Aaron Li <aaron.li@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Rangasai V Chaganty <rangasai.v.chaganty@intel.com>
Cc: Siyuan Fu <siyuan.fu@intel.com>
---
 Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.c   | 4 ++++
 Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.inf | 3 +++
 Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec                            | 7 +++++++
 3 files changed, 14 insertions(+)

diff --git a/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.c b/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.c
index 8d6574f66794..5c7ee6910c8e 100644
--- a/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.c
+++ b/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.c
@@ -132,6 +132,10 @@ IsMicrocodePatchNeedLoad (
   CPU_MICROCODE_EXTENDED_TABLE           *ExtendedTable;
   UINTN                                  Index;
 
+  if (FeaturePcdGet (PcdShadowAllMicrocode)) {
+    return TRUE;
+  }
+
   //
   // Check the 'ProcessorSignature' and 'ProcessorFlags' in microcode patch header.
   //
diff --git a/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.inf b/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.inf
index 019400ab31da..581780add891 100644
--- a/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.inf
+++ b/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.inf
@@ -39,5 +39,8 @@ [Guids]
   gEdkiiMicrocodeShadowInfoHobGuid
   gEdkiiMicrocodeStorageTypeFlashGuid
 
+[Pcd]
+  gIntelSiliconPkgTokenSpaceGuid.PcdShadowAllMicrocode
+
 [Depex]
   TRUE
diff --git a/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec b/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec
index e4a7fec3a3ea..3a12fe99fac6 100644
--- a/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec
+++ b/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec
@@ -76,6 +76,13 @@ [Protocols]
   # Include/Protocol/PlatformDeviceSecurityPolicy.h
   gEdkiiDeviceSecurityPolicyProtocolGuid = {0x7ea41a99, 0x5e32, 0x4c97, {0x88, 0xc4, 0xd6, 0xe7, 0x46, 0x84, 0x9, 0xd4}}
 
+[PcdsFeatureFlag]
+  ## Indicates if all microcode update patches shall be shadowed to memory.
+  #   TRUE  - All microcode patches will be shadowed.<BR>
+  #   FALSE - Only the microcode for current present processors will be shadowed.<BR>
+  # @Prompt Shadow all microcode update patches.
+  gIntelSiliconPkgTokenSpaceGuid.PcdShadowAllMicrocode|FALSE|BOOLEAN|0x00000006
+
 [PcdsFixedAtBuild, PcdsPatchableInModule]
   ## Error code for VTd error.<BR><BR>
   #  EDKII_ERROR_CODE_VTD_ERROR = (EFI_IO_BUS_UNSPECIFIED | (EFI_OEM_SPECIFIC | 0x00000000)) = 0x02008000<BR>
-- 
2.23.0.windows.1