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