[PATCH] SecuritPkg: Tcg2Smm: Add PlatformClass to TPM2 Table

["Zhang, Chao B" <chao.b.zhang@intel.com>]

Add PlatformClass info into TPM2 ACPI table, it is only valid with table
Rev 4 and later.

Cc: Star Zeng <star.zeng@intel.com>
Cc: Yao Jiewen <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chao Zhang <chao.b.zhang@intel.com>
---
 SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.c   | 10 ++++++++++
 SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.inf |  1 +
 2 files changed, 11 insertions(+)

diff --git a/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.c b/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.c
index 0c3b19c..5a1fd3e 100644
--- a/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.c
+++ b/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.c
@@ -513,6 +513,16 @@ PublishTpm2 (
   DEBUG((DEBUG_INFO, "Tpm2 ACPI table revision is %d\n", mTpm2AcpiTemplate.Header.Revision));
 
   //
+  // PlatformClass is only valid for version 4 and above
+  //    BIT0~15:  PlatformClass 
+  //    BIT16~31: Reserved
+  //
+  if (mTpm2AcpiTemplate.Header.Revision >= EFI_TPM2_ACPI_TABLE_REVISION_4) {
+    mTpm2AcpiTemplate.Flags = (mTpm2AcpiTemplate.Flags & 0xFFFF0000) | PcdGet8(PcdTpmPlatformClass);
+    DEBUG((DEBUG_INFO, "Tpm2 ACPI table PlatformClass is %d\n", (mTpm2AcpiTemplate.Flags & 0x0000FFFF)));
+  }
+
+  //
   // Measure to PCR[0] with event EV_POST_CODE ACPI DATA
   //
   TpmMeasureAndLogData(
diff --git a/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.inf b/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.inf
index 2793242..7018474 100644
--- a/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.inf
+++ b/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.inf
@@ -74,6 +74,7 @@
   gEfiSecurityPkgTokenSpaceGuid.PcdTpmBaseAddress               ## CONSUMES
   gEfiSecurityPkgTokenSpaceGuid.PcdTcgPhysicalPresenceInterfaceVer  ## CONSUMES
   gEfiSecurityPkgTokenSpaceGuid.PcdTpm2AcpiTableRev                 ## CONSUMES
+  gEfiSecurityPkgTokenSpaceGuid.PcdTpmPlatformClass                 ## SOMETIMES_CONSUMES
 
 [Depex]
   gEfiAcpiTableProtocolGuid AND
-- 
1.9.5.msysgit.1