/**
The handler for TPM physical presence function:
Submit TPM Operation Request to Pre-OS Environment and
Submit TPM Operation Request to Pre-OS Environment 2.
This API should be invoked in OS runtime phase to interface with ACPI method.
Caution: This function may receive untrusted input.
@param[in] OperationRequest TPM physical presence operation request.
@param[in] RequestParameter TPM physical presence operation request parameter.
@return Return Code for Submit TPM Operation Request to Pre-OS Environment and
Submit TPM Operation Request to Pre-OS Environment 2.
**/
UINT32
EFIAPI
Tcg2PhysicalPresenceLibSubmitRequestToPreOSFunction (
IN UINT32 OperationRequest,
IN UINT32 RequestParameter
)
{
EFI_STATUS Status;
UINTN DataSize;
EFI_TCG2_PHYSICAL_PRESENCE PpData;
EFI_TCG2_PHYSICAL_PRESENCE_FLAGS Flags;
DEBUG ((EFI_D_INFO, "[TPM2] SubmitRequestToPreOSFunction, Request = %x, %x\n", OperationRequest, RequestParameter));
//
// Get the Physical Presence variable
//
DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE);
Status = mTcg2PpSmmVariable->SmmGetVariable (
TCG2_PHYSICAL_PRESENCE_VARIABLE,
&gEfiTcg2PhysicalPresenceGuid,
NULL,
&DataSize,
&PpData
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "[TPM2] Get PP variable failure! Status = %r\n", Status));
return TCG_PP_SUBMIT_REQUEST_TO_PREOS_GENERAL_FAILURE;
}
if ((OperationRequest > TCG2_PHYSICAL_PRESENCE_NO_ACTION_MAX) &&
(OperationRequest < TCG2_PHYSICAL_PRESENCE_VENDOR_SPECIFIC_OPERATION) ) {
//
// This command requires UI to prompt user for Auth data.
//
return TCG_PP_SUBMIT_REQUEST_TO_PREOS_NOT_IMPLEMENTED;
}
if ((PpData.PPRequest != OperationRequest) ||
(PpData.PPRequestParameter != RequestParameter)) {
PpData.PPRequest = (UINT8)OperationRequest;
PpData.PPRequestParameter = RequestParameter;
DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE);
Status = mTcg2PpSmmVariable->SmmSetVariable (
TCG2_PHYSICAL_PRESENCE_VARIABLE,
&gEfiTcg2PhysicalPresenceGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
DataSize,
&PpData
);
}
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "[TPM2] Set PP variable failure! Status = %r\n", Status));
return TCG_PP_SUBMIT_REQUEST_TO_PREOS_GENERAL_FAILURE;
}
if (OperationRequest >= TCG2_PHYSICAL_PRESENCE_VENDOR_SPECIFIC_OPERATION) {
DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE_FLAGS);
Status = mTcg2PpSmmVariable->SmmGetVariable (
TCG2_PHYSICAL_PRESENCE_FLAGS_VARIABLE,
&gEfiTcg2PhysicalPresenceGuid,
NULL,
&DataSize,
&Flags
);
if (EFI_ERROR (Status)) {
Flags.PPFlags = TCG2_BIOS_TPM_MANAGEMENT_FLAG_DEFAULT;
}
return Tcg2PpVendorLibSubmitRequestToPreOSFunction (OperationRequest, Flags.PPFlags, RequestParameter);
}
return TCG_PP_SUBMIT_REQUEST_TO_PREOS_SUCCESS;
}
/**
The handler for TPM physical presence function:
Submit TPM Operation Request to Pre-OS Environment and
Submit TPM Operation Request to Pre-OS Environment 2.
This API should be invoked in OS runtime phase to interface with ACPI method.
Caution: This function may receive untrusted input.
@param[in, out] Pointer to OperationRequest TPM physical presence operation request.
@param[in, out] Pointer to RequestParameter TPM physical presence operation request parameter.
@return Return Code for Submit TPM Operation Request to Pre-OS Environment and
Submit TPM Operation Request to Pre-OS Environment 2.
**/
UINT32
Tcg2PhysicalPresenceLibSubmitRequestToPreOSFunctionEx (
IN OUT UINT32 *OperationRequest,
IN OUT UINT32 *RequestParameter
)
{
EFI_STATUS Status;
UINT32 ReturnCode;
UINTN DataSize;
EFI_TCG2_PHYSICAL_PRESENCE PpData;
EFI_TCG2_PHYSICAL_PRESENCE_FLAGS Flags;
DEBUG ((EFI_D_INFO, "[TPM2] SubmitRequestToPreOSFunction, Request = %x, %x\n", *OperationRequest, *RequestParameter));
ReturnCode = TCG_PP_SUBMIT_REQUEST_TO_PREOS_SUCCESS;
//
// Get the Physical Presence variable
//
DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE);
Status = mTcg2PpSmmVariable->SmmGetVariable (
TCG2_PHYSICAL_PRESENCE_VARIABLE,
&gEfiTcg2PhysicalPresenceGuid,
NULL,
&DataSize,
&PpData
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "[TPM2] Get PP variable failure! Status = %r\n", Status));
ReturnCode = TCG_PP_SUBMIT_REQUEST_TO_PREOS_GENERAL_FAILURE;
goto EXIT;
}
if ((*OperationRequest > TCG2_PHYSICAL_PRESENCE_NO_ACTION_MAX) &&
(*OperationRequest < TCG2_PHYSICAL_PRESENCE_VENDOR_SPECIFIC_OPERATION) ) {
//
// This command requires UI to prompt user for Auth data.
//
ReturnCode = TCG_PP_SUBMIT_REQUEST_TO_PREOS_NOT_IMPLEMENTED;
goto EXIT;
}
if ((PpData.PPRequest != *OperationRequest) ||
(PpData.PPRequestParameter != *RequestParameter)) {
PpData.PPRequest = (UINT8)*OperationRequest;
PpData.PPRequestParameter = *RequestParameter;
DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE);
Status = mTcg2PpSmmVariable->SmmSetVariable (
TCG2_PHYSICAL_PRESENCE_VARIABLE,
&gEfiTcg2PhysicalPresenceGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
DataSize,
&PpData
);
}
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "[TPM2] Set PP variable failure! Status = %r\n", Status));
ReturnCode = TCG_PP_SUBMIT_REQUEST_TO_PREOS_GENERAL_FAILURE;
goto EXIT;
}
if (*OperationRequest >= TCG2_PHYSICAL_PRESENCE_VENDOR_SPECIFIC_OPERATION) {
DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE_FLAGS);
Status = mTcg2PpSmmVariable->SmmGetVariable (
TCG2_PHYSICAL_PRESENCE_FLAGS_VARIABLE,
&gEfiTcg2PhysicalPresenceGuid,
NULL,
&DataSize,
&Flags
);
if (EFI_ERROR (Status)) {
Flags.PPFlags = TCG2_BIOS_TPM_MANAGEMENT_FLAG_DEFAULT;
}
ReturnCode = Tcg2PpVendorLibSubmitRequestToPreOSFunction (*OperationRequest, Flags.PPFlags, *RequestParameter);
}
EXIT:
//
// Sync PPRQ/PPRM from PP Variable if PP submission fails
//
if (ReturnCode != TCG_PP_SUBMIT_REQUEST_TO_PREOS_SUCCESS) {
DEBUG ((EFI_D_ERROR, "[TPM2] Submit PP Request failure! Sync PPRQ/PPRM with PP variable.\n", Status));
DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE);
ZeroMem(&PpData, DataSize);
Status = mTcg2PpSmmVariable->SmmGetVariable (
TCG2_PHYSICAL_PRESENCE_VARIABLE,
&gEfiTcg2PhysicalPresenceGuid,
NULL,
&DataSize,
&PpData
);
*OperationRequest = (UINT32)PpData.PPRequest;
*RequestParameter = PpData.PPRequestParameter;
}
return ReturnCode;
}