Tcg2PlatformPei.c

Go to the documentation of this file.

 
#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
 
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
};
 
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;
}