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86d5680817
This change introduces a `Tpm2DeviceLibFfa` library to support TPM over FF-A. The implementation follows the TPM over FF-A spec v1.0 BET: https://developer.arm.com/documentation/den0138/latest/ The change is tested on QEMU SBSA virtual platform and proprietary hardware platforms. Co-authored-by: Raymond Diaz <raymonddiaz@microsoft.com> Signed-off-by: Kun Qin <kun.qin@microsoft.com>
90 lines
2.1 KiB
C
90 lines
2.1 KiB
C
/** @file
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This library provides an implementation of Tpm2DeviceLib
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using ARM64 SMC calls to request TPM service.
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The implementation is only supporting the Command Response Buffer (CRB)
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for sharing data with the TPM.
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Copyright (c), Microsoft Corporation.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/BaseLib.h>
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#include <Library/Tpm2DeviceLib.h>
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#include <IndustryStandard/Tpm20.h>
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#include "Tpm2DeviceLibFfa.h"
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/**
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Send a command to TPM for execution and return response data.
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Used during boot only.
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@retval EFI_SUCCESS Command was successfully sent to the TPM
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and the response was copied to the Output buffer.
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@retval Other Some error occurred in communication with the TPM.
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**/
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EFI_STATUS
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EFIAPI
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Tpm2SubmitCommand (
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IN UINT32 InputParameterBlockSize,
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IN UINT8 *InputParameterBlock,
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IN OUT UINT32 *OutputParameterBlockSize,
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IN UINT8 *OutputParameterBlock
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)
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{
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return FfaTpm2SubmitCommand (
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InputParameterBlockSize,
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InputParameterBlock,
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OutputParameterBlockSize,
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OutputParameterBlock
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);
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}
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/**
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This service requests use TPM2.
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Since every communication with the TPM is blocking
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you are always good to start communicating with the TPM.
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@retval EFI_SUCCESS Get the control of TPM2 chip.
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**/
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EFI_STATUS
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EFIAPI
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Tpm2RequestUseTpm (
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VOID
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)
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{
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return FfaTpm2RequestUseTpm ();
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}
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/**
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This service register TPM2 device.
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@param Tpm2Device TPM2 device
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@retval EFI_UNSUPPORTED System does not support register this TPM2 device.
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**/
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EFI_STATUS
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EFIAPI
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Tpm2RegisterTpm2DeviceLib (
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IN TPM2_DEVICE_INTERFACE *Tpm2Device
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)
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{
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return EFI_UNSUPPORTED;
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}
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/**
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Check that we have an address for the CRB
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@retval EFI_SUCCESS The entry point is executed successfully.
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@retval EFI_NO_MAPPING The TPM base address is not set up.
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@retval EFI_UNSUPPORTED The TPM interface type is not supported.
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**/
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EFI_STATUS
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EFIAPI
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Tpm2DeviceLibFfaConstructor (
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VOID
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)
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{
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return InternalTpm2DeviceLibFfaConstructor ();
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}
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