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