X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=SecurityPkg%2FTcg%2FTcg2Smm%2FTcg2Smm.c;h=5a1fd3e363c7202375b93c0feb389d4da1686ca1;hp=0c3b19ca74cc894fc94d30b840f47e2857d983bb;hb=bf3b7aae7100b60ff8a387f0b7604dbb6ff29fc9;hpb=713e4b007cb791829397522ad8f366dd1e08bee6

diff --git a/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.c b/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.c
index 0c3b19ca74..5a1fd3e363 100644
--- a/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.c
+++ b/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.c
@@ -512,6 +512,16 @@ PublishTpm2 (
   mTpm2AcpiTemplate.Header.Revision = PcdGet8(PcdTpm2AcpiTableRev);
   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
   //