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/** @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;
}
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