TdxMeasurementHob.c File Reference

#include <PiPei.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <IndustryStandard/Tpm20.h>
#include <IndustryStandard/UefiTcgPlatform.h>
#include <Library/HobLib.h>
#include <Library/PrintLib.h>
#include <Library/TcgEventLogRecordLib.h>
#include <WorkArea.h>

Go to the source code of this file.

Data Structures
struct	TDX_HANDOFF_TABLE_POINTERS2

Macros
#define	HANDOFF_TABLE_DESC   "TdxTable"
#define	FV_HANDOFF_TABLE_DESC   "Fv(XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX)"
#define	TDX_DIGEST_VALUE_LEN   (sizeof (UINT32) + sizeof (TPMI_ALG_HASH) + SHA384_DIGEST_SIZE)

Typedefs
typedef PLATFORM_FIRMWARE_BLOB2_STRUCT	CFV_HANDOFF_TABLE_POINTERS2

Functions
STATIC EFI_STATUS	BuildTdxMeasurementGuidHob (UINT32 RtmrIndex, UINT32 EventType, UINT8 *EventData, UINT32 EventSize, UINT8 *HashValue, UINT32 HashSize)
VOID *	GetFvName (IN EFI_PHYSICAL_ADDRESS FvBase, IN UINT64 FvLength)
EFI_STATUS	InternalBuildGuidHobForTdxMeasurement (VOID)

Detailed Description

Build GuidHob for tdx measurement.

Copyright (c) 2022 - 2023, Intel Corporation. All rights reserved.

SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file TdxMeasurementHob.c.

Macro Definition Documentation

FV_HANDOFF_TABLE_DESC

#define FV_HANDOFF_TABLE_DESC   "Fv(XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX)"

Definition at line 33 of file TdxMeasurementHob.c.

HANDOFF_TABLE_DESC

#define HANDOFF_TABLE_DESC   "TdxTable"

Definition at line 23 of file TdxMeasurementHob.c.

Typedef Documentation

CFV_HANDOFF_TABLE_POINTERS2

typedef PLATFORM_FIRMWARE_BLOB2_STRUCT CFV_HANDOFF_TABLE_POINTERS2

Definition at line 34 of file TdxMeasurementHob.c.

Function Documentation

BuildTdxMeasurementGuidHob()

STATIC EFI_STATUS BuildTdxMeasurementGuidHob	(	UINT32	RtmrIndex,
		UINT32	EventType,
		UINT8 *	EventData,
		UINT32	EventSize,
		UINT8 *	HashValue,
		UINT32	HashSize
	)

Build GuidHob for Tdx measurement.

Tdx measurement includes the measurement of TdHob and CFV. They're measured and extended to RTMR registers in SEC phase. Because at that moment the Hob service are not available. So the values of the measurement are saved in workarea and will be built into GuidHob after the Hob service is ready.

Parameters

RtmrIndex	RTMR index
EventType	Event type
EventData	Event data
EventSize	Size of event data
HashValue	Hash value
HashSize	Size of hash

Return values

EFI_SUCCESS	Successfully build the GuidHobs
Others	Other error as indicated

Definition at line 56 of file TdxMeasurementHob.c.

GetFvName()

VOID * GetFvName	(	IN EFI_PHYSICAL_ADDRESS	FvBase,
		IN UINT64	FvLength
	)

Get the FvName from the FV header.

Causion: The FV is untrusted input.

Parameters

[in]	FvBase	Base address of FV image.
[in]	FvLength	Length of FV image.

Returns

FvName pointer

Return values

NULL	FvName is NOT found

Definition at line 131 of file TdxMeasurementHob.c.

InternalBuildGuidHobForTdxMeasurement()

EFI_STATUS InternalBuildGuidHobForTdxMeasurement

(

VOID

)

Build the GuidHob for tdx measurements which were done in SEC phase. The measurement values are stored in WorkArea.

Return values

EFI_SUCCESS	The GuidHob is built successfully
Others	Other errors as indicated

Definition at line 173 of file TdxMeasurementHob.c.