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/** @file
Configure TPM 2 platform hierarchy on TPM state resume failure on S3 resume
Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
Copyright (c) Microsoft Corporation.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiPei.h>
#include <Library/PeiServicesLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/HobLib.h>
#include <Library/Tpm2CommandLib.h>
#include <Library/Tpm2DeviceLib.h>
#include <Library/TpmPlatformHierarchyLib.h>
#include <Library/RngLib.h>
#include <Ppi/EndOfPeiPhase.h>
#define MAX_NEW_AUTHORIZATION_SIZE SHA512_DIGEST_SIZE
/**
This function handles PlatformInit task at the end of PEI
@param[in] PeiServices Pointer to PEI Services Table.
@param[in] NotifyDescriptor Pointer to the descriptor for the Notification event that
caused this function to execute.
@param[in] Ppi Pointer to the PPI data associated with this function.
@retval EFI_SUCCESS The function completes successfully
@retval others
**/
EFI_STATUS
EFIAPI
PlatformInitEndOfPei (
IN CONST EFI_PEI_SERVICES **PeiServices,
IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,
IN VOID *Ppi
)
{
VOID *TcgEventLog;
//
// Try to get TcgEventLog in S3 to see if S3 error is reported.
//
TcgEventLog = GetFirstGuidHob(&gTcgEventEntryHobGuid);
if (TcgEventLog == NULL) {
TcgEventLog = GetFirstGuidHob(&gTcgEvent2EntryHobGuid);
}
if (TcgEventLog == NULL) {
//
// no S3 error reported
//
return EFI_SUCCESS;
}
//
// If there is S3 error on TPM_SU_STATE and success on TPM_SU_CLEAR,
// configure the TPM Platform Hierarchy.
//
ConfigureTpmPlatformHierarchy ();
return EFI_SUCCESS;
}
static EFI_PEI_NOTIFY_DESCRIPTOR mEndOfPeiNotifyList = {
(EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gEfiEndOfPeiSignalPpiGuid,
(EFI_PEIM_NOTIFY_ENTRY_POINT)PlatformInitEndOfPei
};
/**
Main entry
@param[in] FileHandle Handle of the file being invoked.
@param[in] PeiServices Pointer to PEI Services table.
@retval EFI_SUCCESS Install function successfully.
**/
EFI_STATUS
EFIAPI
Tcg2PlatformPeiEntryPoint (
IN EFI_PEI_FILE_HANDLE FileHandle,
IN CONST EFI_PEI_SERVICES **PeiServices
)
{
EFI_STATUS Status;
EFI_BOOT_MODE BootMode;
Status = PeiServicesGetBootMode (&BootMode);
ASSERT_EFI_ERROR(Status);
if (BootMode != BOOT_ON_S3_RESUME) {
return EFI_SUCCESS;
}
//
// Performing PlatformInitEndOfPei after EndOfPei PPI produced
//
Status = PeiServicesNotifyPpi (&mEndOfPeiNotifyList);
return Status;
}
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