SecurityPkg: Tpm2DeviceLib: Enable CapCRBIdleBypass support

Directly transition from CMD completion to CMD Ready state if device
supports IdleByPass

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>

1 files changed, 19 insertions, 0 deletions

diff --git a/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2DeviceLibDTpm.c b/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2DeviceLibDTpm.c
index 3feb64df7e..e6fe563b40 100644
--- a/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2DeviceLibDTpm.c
+++ b/SecurityPkg/Library/Tpm2DeviceLibDTpm/Tpm2DeviceLibDTpm.c
@@ -32,6 +32,18 @@ Tpm2GetPtpInterface (
   );

 

 /**

+  Return PTP CRB interface IdleByPass state.

+

+  @param[in] Register                Pointer to PTP register.

+

+  @return PTP CRB interface IdleByPass state.

+**/

+UINT8

+Tpm2GetIdleByPass (

+  IN VOID *Register

+  );

+

+/**

   This service enables the sending of commands to the TPM2.

 

   @param[in]      InputParameterBlockSize  Size of the TPM2 input parameter block.

@@ -140,6 +152,7 @@ Tpm2DeviceLibConstructor (
   )

 {

   TPM2_PTP_INTERFACE_TYPE  PtpInterface;

+  UINT8                    IdleByPass;

 

   //

   // Cache current active TpmInterfaceType only when needed

@@ -148,5 +161,11 @@ Tpm2DeviceLibConstructor (
     PtpInterface = Tpm2GetPtpInterface ((VOID *) (UINTN) PcdGet64 (PcdTpmBaseAddress));

     PcdSet8S(PcdActiveTpmInterfaceType, PtpInterface);

   }

+

+  if (PcdGet8(PcdActiveTpmInterfaceType) == PtpInterfaceCrb && PcdGet8(PcdCRBIdleByPass) == 0xFF) {

+    IdleByPass = Tpm2GetIdleByPass((VOID *) (UINTN) PcdGet64 (PcdTpmBaseAddress));

+    PcdSet8S(PcdCRBIdleByPass, IdleByPass);

+  }

+

   return EFI_SUCCESS;

 }