/** @file | |
Set TPM device type | |
In SecurityPkg, this module initializes the TPM device type based on a UEFI | |
variable and/or hardware detection. In OvmfPkg, the module only performs TPM | |
hardware detection. | |
Copyright (c) 2015, Intel Corporation. All rights reserved.<BR> | |
Copyright (C) 2018, Red Hat, Inc. | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
#include <PiPei.h> | |
#include <Guid/TpmInstance.h> | |
#include <Library/DebugLib.h> | |
#include <Library/PeiServicesLib.h> | |
#include <Library/Tpm2DeviceLib.h> | |
#include <Ppi/TpmInitialized.h> | |
#include "Tpm12Support.h" | |
STATIC CONST EFI_PEI_PPI_DESCRIPTOR mTpmSelectedPpi = { | |
(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST), | |
&gEfiTpmDeviceSelectedGuid, | |
NULL | |
}; | |
STATIC CONST EFI_PEI_PPI_DESCRIPTOR mTpmInitializationDonePpiList = { | |
EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST, | |
&gPeiTpmInitializationDonePpiGuid, | |
NULL | |
}; | |
/** | |
The entry point for Tcg2 configuration driver. | |
@param FileHandle Handle of the file being invoked. | |
@param PeiServices Describes the list of possible PEI Services. | |
**/ | |
EFI_STATUS | |
EFIAPI | |
Tcg2ConfigPeimEntryPoint ( | |
IN EFI_PEI_FILE_HANDLE FileHandle, | |
IN CONST EFI_PEI_SERVICES **PeiServices | |
) | |
{ | |
UINTN Size; | |
EFI_STATUS Status; | |
DEBUG ((DEBUG_INFO, "%a\n", __func__)); | |
Status = InternalTpm12Detect (); | |
if (!EFI_ERROR (Status)) { | |
DEBUG ((DEBUG_INFO, "%a: TPM1.2 detected\n", __func__)); | |
Size = sizeof (gEfiTpmDeviceInstanceTpm12Guid); | |
Status = PcdSetPtrS ( | |
PcdTpmInstanceGuid, | |
&Size, | |
&gEfiTpmDeviceInstanceTpm12Guid | |
); | |
ASSERT_EFI_ERROR (Status); | |
} else { | |
Status = Tpm2RequestUseTpm (); | |
if (!EFI_ERROR (Status)) { | |
DEBUG ((DEBUG_INFO, "%a: TPM2 detected\n", __func__)); | |
Size = sizeof (gEfiTpmDeviceInstanceTpm20DtpmGuid); | |
Status = PcdSetPtrS ( | |
PcdTpmInstanceGuid, | |
&Size, | |
&gEfiTpmDeviceInstanceTpm20DtpmGuid | |
); | |
ASSERT_EFI_ERROR (Status); | |
} else { | |
DEBUG ((DEBUG_INFO, "%a: no TPM detected\n", __func__)); | |
// | |
// If no TPM2 was detected, we still need to install | |
// TpmInitializationDonePpi. Namely, Tcg2Pei will exit early upon seeing | |
// the default (all-bits-zero) contents of PcdTpmInstanceGuid, thus we have | |
// to install the PPI in its place, in order to unblock any dependent | |
// PEIMs. | |
// | |
Status = PeiServicesInstallPpi (&mTpmInitializationDonePpiList); | |
ASSERT_EFI_ERROR (Status); | |
} | |
} | |
// | |
// Selection done | |
// | |
Status = PeiServicesInstallPpi (&mTpmSelectedPpi); | |
ASSERT_EFI_ERROR (Status); | |
return Status; | |
} |