SecrutiyPkg/Tcg: Import Tcg2PlatformDxe from edk2-platforms

[mirror_edk2.git] / SecurityPkg / Tcg / Tcg2PlatformDxe / Tcg2PlatformDxe.c

/** @file\r
  Platform specific TPM2 component for configuring the Platform Hierarchy.\r
\r
  Copyright (c) 2017 - 2019, Intel Corporation. All rights reserved.<BR>\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <PiDxe.h>\r
\r
#include <Library/DebugLib.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
#include <Library/UefiLib.h>\r
#include <Library/TpmPlatformHierarchyLib.h>\r
#include <Protocol/DxeSmmReadyToLock.h>\r
\r
/**\r
   This callback function will run at the SmmReadyToLock event.\r
\r
   Configuration of the TPM's Platform Hierarchy Authorization Value (platformAuth)\r
   and Platform Hierarchy Authorization Policy (platformPolicy) can be defined through this function.\r
\r
  @param  Event   Pointer to this event\r
  @param  Context Event hanlder private data\r
 **/\r
VOID\r
EFIAPI\r
SmmReadyToLockEventCallBack (\r
  IN EFI_EVENT  Event,\r
  IN VOID       *Context\r
  )\r
{\r
  EFI_STATUS   Status;\r
  VOID         *Interface;\r
\r
  //\r
  // Try to locate it because EfiCreateProtocolNotifyEvent will trigger it once when registration.\r
  // Just return if it is not found.\r
  //\r
  Status = gBS->LocateProtocol (\r
                  &gEfiDxeSmmReadyToLockProtocolGuid,\r
                  NULL,\r
                  &Interface\r
                  );\r
  if (EFI_ERROR (Status)) {\r
    return ;\r
  }\r
\r
  ConfigureTpmPlatformHierarchy ();\r
\r
  gBS->CloseEvent (Event);\r
}\r
\r
/**\r
   The driver's entry point. Will register a function for callback during SmmReadyToLock event to\r
   configure the TPM's platform authorization.\r
\r
   @param[in] ImageHandle  The firmware allocated handle for the EFI image.\r
   @param[in] SystemTable  A pointer to the EFI System Table.\r
\r
   @retval EFI_SUCCESS     The entry point is executed successfully.\r
   @retval other           Some error occurs when executing this entry point.\r
**/\r
EFI_STATUS\r
EFIAPI\r
Tcg2PlatformDxeEntryPoint (\r
  IN    EFI_HANDLE                  ImageHandle,\r
  IN    EFI_SYSTEM_TABLE            *SystemTable\r
  )\r
{\r
  VOID       *Registration;\r
  EFI_EVENT  Event;\r
\r
  Event = EfiCreateProtocolNotifyEvent (\r
            &gEfiDxeSmmReadyToLockProtocolGuid,\r
            TPL_CALLBACK,\r
            SmmReadyToLockEventCallBack,\r
            NULL,\r
            &Registration\r
            );\r
\r
  ASSERT (Event != NULL);\r
\r
  return EFI_SUCCESS;\r
}\r