OvmfPkg/IntelTdx: Cache and measure FwCfg

Since OVMF would initialize the platform info with FwCfg,
TDVF needs to cache and measure the FwCfg at first.

Cc: Erdem Aktas <erdemaktas@google.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Min Xu <min.m.xu@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>
Signed-off-by: Ceping Sun <cepingx.sun@intel.com>

OvmfPkg/IntelTdx/IntelTdxX64.dsc

@@ -240,6 +240,7 @@
   PeilessStartupLib|OvmfPkg/Library/PeilessStartupLib/PeilessStartupLib.inf
   CcProbeLib|OvmfPkg/Library/CcProbeLib/SecPeiCcProbeLib.inf
   TdxMeasurementLib|OvmfPkg/IntelTdx/TdxMeasurementLib/SecPeiTdxMeasurementLib.inf
+  TpmMeasurementLib|SecurityPkg/Library/SecTpmMeasurementLib/SecTpmMeasurementLib.inf
 
 [LibraryClasses.common.DXE_CORE]
   HobLib|MdePkg/Library/DxeCoreHobLib/DxeCoreHobLib.inf

OvmfPkg/Library/PeilessStartupLib/PeilessStartup.c

@@ -7,6 +7,8 @@
 **/
 
 #include <PiPei.h>
+#include <Base.h>
+#include <Library/QemuFwCfgLib.h>
 #include <Library/HobLib.h>
 #include <Library/BaseLib.h>
 #include <Library/BaseMemoryLib.h>
@@ -48,6 +50,10 @@ InitializePlatform (
   DEBUG ((DEBUG_INFO, "InitializePlatform in Pei-less boot\n"));
   PlatformDebugDumpCmos ();
 
+  if (RETURN_ERROR (QemuFwCfgInitCache (PlatformInfoHob))) {
+    DEBUG ((DEBUG_ERROR, "QemuFwCfgInitCache failed !\n"));
+  }
+
   PlatformInfoHob->DefaultMaxCpuNumber = 64;
   PlatformInfoHob->PcdPciMmio64Size    = 0x800000000;