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/** @file
The module entry point for Tcg2 configuration module.
Copyright (c) 2018, Red Hat, Inc.
Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <PiPei.h>
#include <Guid/TpmInstance.h>
#include <Library/DebugLib.h>
#include <Library/PeiServicesLib.h>
#include <Library/Tpm2DeviceLib.h>
#include <Ppi/TpmInitialized.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", __FUNCTION__));
Status = Tpm2RequestUseTpm ();
if (!EFI_ERROR (Status)) {
DEBUG ((DEBUG_INFO, "%a: TPM2 detected\n", __FUNCTION__));
Size = sizeof(gEfiTpmDeviceInstanceTpm20DtpmGuid);
Status = PcdSetPtrS (
PcdTpmInstanceGuid,
&Size,
&gEfiTpmDeviceInstanceTpm20DtpmGuid
);
ASSERT_EFI_ERROR (Status);
} else {
DEBUG ((DEBUG_INFO, "%a: no TPM2 detected\n", __FUNCTION__));
// 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;
}
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