From f15cb995bb3880b77e15afe6facd3da05e599a17 Mon Sep 17 00:00:00 2001
From: "Zhang, Chao B" <chao.b.zhang@intel.com>
Date: Tue, 8 May 2018 14:51:57 +0800
Subject: SecurityPkg: Cache TPM interface type info

Cache TPM interface type info to avoid excessive interface ID register read

Cc: Long Qin <qin.long@intel.com>
Cc: Yao Jiewen <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Chao Zhang <chao.b.zhang@intel.com>
Reviewed-by: Long Qin <qin.long@intel.com>
---
 SecurityPkg/SecurityPkg.dec | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

(limited to 'SecurityPkg/SecurityPkg.dec')

diff --git a/SecurityPkg/SecurityPkg.dec b/SecurityPkg/SecurityPkg.dec
index 497354634b..60f1c0a0e3 100644
--- a/SecurityPkg/SecurityPkg.dec
+++ b/SecurityPkg/SecurityPkg.dec
@@ -463,6 +463,16 @@
   # linked, and the value of this PCD should be got in module entrypoint.
   # @Prompt Hash Algorithm bitmap.
   gEfiSecurityPkgTokenSpaceGuid.PcdTcg2HashAlgorithmBitmap|0xFFFFFFFF|UINT32|0x00010016
-  
+
+  ## This PCD indicates current active TPM interface type.
+  #  Accodingt to TCG PTP spec 1.3, there are 3 types defined in TPM2_PTP_INTERFACE_TYPE.<BR>
+  #  0x00 - FIFO interface as defined in TIS 1.3 is active.<BR>
+  #  0x01 - FIFO interface as defined in PTP for TPM 2.0 is active.<BR>
+  #  0x02 - CRB interface is active.<BR>
+  #  0xFF - Contains no current active TPM interface type.<BR>
+  #
+  # @Prompt current active TPM interface type.
+  gEfiSecurityPkgTokenSpaceGuid.PcdActiveTpmInterfaceType|0xFF|UINT8|0x0001001E
+
 [UserExtensions.TianoCore."ExtraFiles"]
   SecurityPkgExtra.uni
-- 
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