Re: [PATCH] SecurityPkg\SmmTcg2PhysicalPresenceLib.c Handle reserved or unimplemented PP Operation

["Zeng, Star" <star.zeng@intel.com>]

Reviewed-by: Star Zeng <star.zeng@intel.com>

-----Original Message-----
From: Zhang, Chao B 
Sent: Friday, September 22, 2017 2:54 PM
To: edk2-devel@lists.01.org
Cc: Yao, Jiewen <jiewen.yao@intel.com>; Zeng, Star <star.zeng@intel.com>; Zhang, Chao B <chao.b.zhang@intel.com>
Subject: [PATCH] SecurityPkg\SmmTcg2PhysicalPresenceLib.c Handle reserved or unimplemented PP Operation

Several PP operations < 128(Vendor Specific) are reserved or unimplemented.
Follow TCG PC Client Platform Physical Presence Interface Specification to return not implemented.
https://trustedcomputinggroup.org/wp-content/uploads/Physical-Presence-Interface_1-30_0-52.pdf

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chao Zhang <chao.b.zhang@intel.com>
---
 .../SmmTcg2PhysicalPresenceLib.c                           | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/SecurityPkg/Library/SmmTcg2PhysicalPresenceLib/SmmTcg2PhysicalPresenceLib.c b/SecurityPkg/Library/SmmTcg2PhysicalPresenceLib/SmmTcg2PhysicalPresenceLib.c
index ba4db11..6061453 100644
--- a/SecurityPkg/Library/SmmTcg2PhysicalPresenceLib/SmmTcg2PhysicalPresenceLib.c
+++ b/SecurityPkg/Library/SmmTcg2PhysicalPresenceLib/SmmTcg2PhysicalPres
+++ enceLib.c
@@ -10,7 +10,7 @@
   Tcg2PhysicalPresenceLibSubmitRequestToPreOSFunction() and Tcg2PhysicalPresenceLibGetUserConfirmationStatusFunction()
   will receive untrusted input and do validation.
 
-Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2015 - 2017, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials  are licensed and made available under the terms and conditions of the BSD License  which accompanies this distribution.  The full text of the license may be found at @@ -291,6 +291,7 @@ Tcg2PhysicalPresenceLibGetUserConfirmationStatusFunction (
       }
       break;
 
+    case TCG2_PHYSICAL_PRESENCE_NO_ACTION:
     case TCG2_PHYSICAL_PRESENCE_SET_PP_REQUIRED_FOR_CLEAR_TRUE:
       RequestConfirmed = TRUE;
       break;
@@ -336,12 +337,11 @@ Tcg2PhysicalPresenceLibGetUserConfirmationStatusFunction (
       break;
 
     default:
-      if (OperationRequest <= TCG2_PHYSICAL_PRESENCE_NO_ACTION_MAX) {
-        RequestConfirmed = TRUE;
-      } else {
-        if (OperationRequest < TCG2_PHYSICAL_PRESENCE_VENDOR_SPECIFIC_OPERATION) {
-          return TCG_PP_GET_USER_CONFIRMATION_NOT_IMPLEMENTED;
-        }
+      if (OperationRequest < TCG2_PHYSICAL_PRESENCE_VENDOR_SPECIFIC_OPERATION) {
+        //
+        // TCG PP spec defined operations that are reserved or un-implemented
+        //
+        return TCG_PP_GET_USER_CONFIRMATION_NOT_IMPLEMENTED;
       }
       break;
   }
--
1.9.5.msysgit.1