Tpm12Support.c File Reference

#include <Library/BaseLib.h>
#include <Library/Tpm12DeviceLib.h>
#include "Tpm12Support.h"

Go to the source code of this file.

Data Structures
struct	TPM_RSP_GET_TICKS

Functions
STATIC EFI_STATUS	TestTpm12 ()
EFI_STATUS	InternalTpm12Detect (VOID)

Detailed Description

Implement the InternalTpm12Detect() function on top of the Tpm12DeviceLib class.

Copyright (C) 2020, Red Hat, Inc.

SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file Tpm12Support.c.

Function Documentation

InternalTpm12Detect()

EFI_STATUS InternalTpm12Detect

(

VOID

)

Detect the presence of a TPM with interface version 1.2.

Return values

EFI_SUCCESS

TPM-1.2 available. The Tpm12RequestUseTpm() and Tpm12SubmitCommand(TPM_ORD_GetTicks) operations (from the Tpm12DeviceLib class) have succeeded.

Returns

Error codes propagated from Tpm12RequestUseTpm() and Tpm12SubmitCommand().

Definition at line 71 of file Tpm12Support.c.

TestTpm12()

STATIC EFI_STATUS TestTpm12

(

)

Probe for the TPM for 1.2 version, by sending TPM1.2 GetTicks

Sending a TPM1.2 command to a TPM2 should return a TPM1.2 header (tag = 0xc4) and error code (TPM_BADTAG = 0x1e)

Return values

EFI_SUCCESS

TPM version 1.2 probing successful.

Returns

Error codes propagated from Tpm12SubmitCommand().

Definition at line 34 of file Tpm12Support.c.