Handle TPM device error and avoid deadloop in BDS.

If TPM error happens, set TPM flag to NOT present, so that trusted boot patch is disabled.
Also report status code for failure, so that platform may register handler to apply policy like force system reset, or disable TPM permanently.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: "Yao, Jiewen" <jiewen.yao@intel.com>
Reviewed-by: "Dong, Guo" <guo.dong@intel.com>




git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16598 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 28 insertions, 8 deletions

diff --git a/SecurityPkg/Tcg/TcgDxe/TcgDxe.c b/SecurityPkg/Tcg/TcgDxe/TcgDxe.c
index 282505dbc7..ea05dc8433 100644
--- a/SecurityPkg/Tcg/TcgDxe/TcgDxe.c
+++ b/SecurityPkg/Tcg/TcgDxe/TcgDxe.c
@@ -8,7 +8,7 @@ buffer overflow, integer overflow.
 

 TcgDxePassThroughToTpm() will receive untrusted input and do basic validation.

 

-Copyright (c) 2005 - 2014, Intel Corporation. All rights reserved.<BR>

+Copyright (c) 2005 - 2015, 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 

@@ -51,6 +51,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #include <Library/TpmCommLib.h>

 #include <Library/PcdLib.h>

 #include <Library/UefiLib.h>

+#include <Library/ReportStatusCodeLib.h>

 

 #include "TpmComm.h"

 

@@ -264,7 +265,7 @@ TcgDxeStatusCheck (
   }

 

   if (EventLogLastEntry != NULL) {

-    if (TcgData->BsCap.TPMDeactivatedFlag) {

+    if (TcgData->BsCap.TPMDeactivatedFlag || (!ProtocolCapability.TPMPresentFlag)) {

       *EventLogLastEntry = (EFI_PHYSICAL_ADDRESS)(UINTN)0;

     } else {

       *EventLogLastEntry = (EFI_PHYSICAL_ADDRESS)(UINTN)TcgData->LastEvent;

@@ -411,7 +412,7 @@ TcgDxeLogEvent (
 

   TcgData = TCG_DXE_DATA_FROM_THIS (This);

   

-  if (TcgData->BsCap.TPMDeactivatedFlag) {

+  if (TcgData->BsCap.TPMDeactivatedFlag || (!ProtocolCapability.TPMPresentFlag)) {

     return EFI_DEVICE_ERROR;

   }

   return TcgDxeLogEventI (

@@ -495,8 +496,8 @@ TcgDxeHashLogExtendEventI (
 {

   EFI_STATUS                        Status;

 

-  if (HashData == NULL && HashDataLen > 0) {

-    return EFI_INVALID_PARAMETER;

+  if (!TcgData->BsCap.TPMPresentFlag) {

+    return EFI_DEVICE_ERROR;

   }

 

   if (HashDataLen > 0 || HashData != NULL) {

@@ -507,7 +508,7 @@ TcgDxeHashLogExtendEventI (
                );

     if (EFI_ERROR(Status)) {

       DEBUG ((DEBUG_ERROR, "TpmCommHashAll Failed. %x\n", Status));

-      return Status;

+      goto Done;

     }

   }

 

@@ -521,6 +522,17 @@ TcgDxeHashLogExtendEventI (
     Status = TcgDxeLogEventI (TcgData, NewEventHdr, NewEventData);

   }

 

+Done:

+  if ((Status == EFI_DEVICE_ERROR) || (Status == EFI_TIMEOUT)) {

+    DEBUG ((EFI_D_ERROR, "TcgDxeHashLogExtendEventI - %r. Disable TPM.\n", Status));

+    TcgData->BsCap.TPMPresentFlag = FALSE;

+    REPORT_STATUS_CODE (

+      EFI_ERROR_CODE | EFI_ERROR_MINOR,

+      (PcdGet32 (PcdStatusCodeSubClassTpmDevice) | EFI_P_EC_INTERFACE_ERROR)

+      );

+    Status = EFI_DEVICE_ERROR;

+  }

+

   return Status;

 }

 

@@ -569,13 +581,17 @@ TcgDxeHashLogExtendEvent (
 

   TcgData = TCG_DXE_DATA_FROM_THIS (This);

   

-  if (TcgData->BsCap.TPMDeactivatedFlag) {

+  if (TcgData->BsCap.TPMDeactivatedFlag || (!ProtocolCapability.TPMPresentFlag)) {

     return EFI_DEVICE_ERROR;

   }

     

   if (AlgorithmId != TPM_ALG_SHA) {

     return EFI_UNSUPPORTED;

   }

+  

+  if (HashData == NULL && HashDataLen > 0) {

+    return EFI_INVALID_PARAMETER;

+  }

 

   Status = TcgDxeHashLogExtendEventI (

              TcgData,

@@ -1346,6 +1362,10 @@ DriverEntry (
     return Status;

   }

 

+  if (GetFirstGuidHob (&gTpmErrorHobGuid) != NULL) {

+    mTcgDxeData.BsCap.TPMPresentFlag = FALSE;

+  }

+

   Status = GetTpmStatus (&mTcgDxeData.BsCap.TPMDeactivatedFlag);

   if (EFI_ERROR (Status)) {

     DEBUG ((

@@ -1363,7 +1383,7 @@ DriverEntry (
                   EFI_NATIVE_INTERFACE,

                   &mTcgDxeData.TcgProtocol

                   );

-  if (!EFI_ERROR (Status) && !mTcgDxeData.BsCap.TPMDeactivatedFlag) {

+  if (!EFI_ERROR (Status) && (!mTcgDxeData.BsCap.TPMDeactivatedFlag) && ProtocolCapability.TPMPresentFlag) {

     //

     // Setup the log area and copy event log from hob list to it

     //