1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
|
/** @file
Initialize TPM2 device and measure FVs before handing off control to DXE.
Copyright (c) 2015 - 2021, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2017, Microsoft Corporation. All rights reserved. <BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiPei.h>
#include <IndustryStandard/UefiTcgPlatform.h>
#include <Ppi/FirmwareVolumeInfo.h>
#include <Ppi/FirmwareVolumeInfo2.h>
#include <Ppi/TpmInitialized.h>
#include <Ppi/FirmwareVolume.h>
#include <Ppi/EndOfPeiPhase.h>
#include <Ppi/FirmwareVolumeInfoMeasurementExcluded.h>
#include <Ppi/FirmwareVolumeInfoPrehashedFV.h>
#include <Ppi/Tcg.h>
#include <Guid/TcgEventHob.h>
#include <Guid/MeasuredFvHob.h>
#include <Guid/TpmInstance.h>
#include <Guid/MigratedFvInfo.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/PeiServicesLib.h>
#include <Library/PeimEntryPoint.h>
#include <Library/Tpm2CommandLib.h>
#include <Library/Tpm2DeviceLib.h>
#include <Library/HashLib.h>
#include <Library/HobLib.h>
#include <Library/PcdLib.h>
#include <Library/PeiServicesTablePointerLib.h>
#include <Protocol/Tcg2Protocol.h>
#include <Library/PerformanceLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/ReportStatusCodeLib.h>
#include <Library/ResetSystemLib.h>
#include <Library/PrintLib.h>
#define PERF_ID_TCG2_PEI 0x3080
typedef struct {
EFI_GUID *EventGuid;
EFI_TCG2_EVENT_LOG_FORMAT LogFormat;
} TCG2_EVENT_INFO_STRUCT;
TCG2_EVENT_INFO_STRUCT mTcg2EventInfo[] = {
{ &gTcgEventEntryHobGuid, EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2 },
{ &gTcgEvent2EntryHobGuid, EFI_TCG2_EVENT_LOG_FORMAT_TCG_2 },
};
BOOLEAN mImageInMemory = FALSE;
EFI_PEI_FILE_HANDLE mFileHandle;
EFI_PEI_PPI_DESCRIPTOR mTpmInitializedPpiList = {
EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,
&gPeiTpmInitializedPpiGuid,
NULL
};
EFI_PEI_PPI_DESCRIPTOR mTpmInitializationDonePpiList = {
EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,
&gPeiTpmInitializationDonePpiGuid,
NULL
};
/**
Do a hash operation on a data buffer, extend a specific TPM PCR with the hash result,
and build a GUIDed HOB recording the event which will be passed to the DXE phase and
added into the Event Log.
@param[in] This Indicates the calling context
@param[in] Flags Bitmap providing additional information.
@param[in] HashData If BIT0 of Flags is 0, it is physical address of the
start of the data buffer to be hashed, extended, and logged.
If BIT0 of Flags is 1, it is physical address of the
start of the pre-hash data buffter to be extended, and logged.
The pre-hash data format is TPML_DIGEST_VALUES.
@param[in] HashDataLen The length, in bytes, of the buffer referenced by HashData.
@param[in] NewEventHdr Pointer to a TCG_PCR_EVENT_HDR data structure.
@param[in] NewEventData Pointer to the new event data.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES No enough memory to log the new event.
@retval EFI_DEVICE_ERROR The command was unsuccessful.
**/
EFI_STATUS
EFIAPI
HashLogExtendEvent (
IN EDKII_TCG_PPI *This,
IN UINT64 Flags,
IN UINT8 *HashData,
IN UINTN HashDataLen,
IN TCG_PCR_EVENT_HDR *NewEventHdr,
IN UINT8 *NewEventData
);
EDKII_TCG_PPI mEdkiiTcgPpi = {
HashLogExtendEvent
};
EFI_PEI_PPI_DESCRIPTOR mTcgPpiList = {
EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,
&gEdkiiTcgPpiGuid,
&mEdkiiTcgPpi
};
//
// Number of firmware blobs to grow by each time we run out of room
//
#define FIRMWARE_BLOB_GROWTH_STEP 4
EFI_PLATFORM_FIRMWARE_BLOB *mMeasuredBaseFvInfo;
UINT32 mMeasuredMaxBaseFvIndex = 0;
UINT32 mMeasuredBaseFvIndex = 0;
EFI_PLATFORM_FIRMWARE_BLOB *mMeasuredChildFvInfo;
UINT32 mMeasuredMaxChildFvIndex = 0;
UINT32 mMeasuredChildFvIndex = 0;
#pragma pack (1)
#define FV_HANDOFF_TABLE_DESC "Fv(XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX)"
typedef struct {
UINT8 BlobDescriptionSize;
UINT8 BlobDescription[sizeof (FV_HANDOFF_TABLE_DESC)];
EFI_PHYSICAL_ADDRESS BlobBase;
UINT64 BlobLength;
} FV_HANDOFF_TABLE_POINTERS2;
#pragma pack ()
/**
Measure and record the Firmware Volume Information once FvInfoPPI install.
@param[in] PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.
@param[in] NotifyDescriptor Address of the notification descriptor data structure.
@param[in] Ppi Address of the PPI that was installed.
@retval EFI_SUCCESS The FV Info is measured and recorded to TPM.
@return Others Fail to measure FV.
**/
EFI_STATUS
EFIAPI
FirmwareVolumeInfoPpiNotifyCallback (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,
IN VOID *Ppi
);
/**
Record all measured Firmware Volume Information into a Guid Hob
@param[in] PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.
@param[in] NotifyDescriptor Address of the notification descriptor data structure.
@param[in] Ppi Address of the PPI that was installed.
@retval EFI_SUCCESS The FV Info is measured and recorded to TPM.
@return Others Fail to measure FV.
**/
EFI_STATUS
EFIAPI
EndofPeiSignalNotifyCallBack (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,
IN VOID *Ppi
);
EFI_PEI_NOTIFY_DESCRIPTOR mNotifyList[] = {
{
EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK,
&gEfiPeiFirmwareVolumeInfoPpiGuid,
FirmwareVolumeInfoPpiNotifyCallback
},
{
EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK,
&gEfiPeiFirmwareVolumeInfo2PpiGuid,
FirmwareVolumeInfoPpiNotifyCallback
},
{
(EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gEfiEndOfPeiSignalPpiGuid,
EndofPeiSignalNotifyCallBack
}
};
/**
Record all measured Firmware Volume Information into a Guid Hob
Guid Hob payload layout is
UINT32 *************************** FIRMWARE_BLOB number
EFI_PLATFORM_FIRMWARE_BLOB******** BLOB Array
@param[in] PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.
@param[in] NotifyDescriptor Address of the notification descriptor data structure.
@param[in] Ppi Address of the PPI that was installed.
@retval EFI_SUCCESS The FV Info is measured and recorded to TPM.
@return Others Fail to measure FV.
**/
EFI_STATUS
EFIAPI
EndofPeiSignalNotifyCallBack (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,
IN VOID *Ppi
)
{
MEASURED_HOB_DATA *MeasuredHobData;
MeasuredHobData = NULL;
PERF_CALLBACK_BEGIN (&gEfiEndOfPeiSignalPpiGuid);
//
// Create a Guid hob to save all measured Fv
//
MeasuredHobData = BuildGuidHob (
&gMeasuredFvHobGuid,
sizeof (UINTN) + sizeof (EFI_PLATFORM_FIRMWARE_BLOB) * (mMeasuredBaseFvIndex + mMeasuredChildFvIndex)
);
if (MeasuredHobData != NULL) {
//
// Save measured FV info enty number
//
MeasuredHobData->Num = mMeasuredBaseFvIndex + mMeasuredChildFvIndex;
//
// Save measured base Fv info
//
CopyMem (MeasuredHobData->MeasuredFvBuf, mMeasuredBaseFvInfo, sizeof (EFI_PLATFORM_FIRMWARE_BLOB) * (mMeasuredBaseFvIndex));
//
// Save measured child Fv info
//
CopyMem (&MeasuredHobData->MeasuredFvBuf[mMeasuredBaseFvIndex], mMeasuredChildFvInfo, sizeof (EFI_PLATFORM_FIRMWARE_BLOB) * (mMeasuredChildFvIndex));
}
PERF_CALLBACK_END (&gEfiEndOfPeiSignalPpiGuid);
return EFI_SUCCESS;
}
/**
Make sure that the current PCR allocations, the TPM supported PCRs,
PcdTcg2HashAlgorithmBitmap and the PcdTpm2HashMask are all in agreement.
**/
VOID
SyncPcrAllocationsAndPcrMask (
VOID
)
{
EFI_STATUS Status;
EFI_TCG2_EVENT_ALGORITHM_BITMAP TpmHashAlgorithmBitmap;
EFI_TCG2_EVENT_ALGORITHM_BITMAP BiosHashAlgorithmBitmap;
UINT32 TpmActivePcrBanks;
UINT32 NewTpmActivePcrBanks;
UINT32 Tpm2PcrMask;
UINT32 NewTpm2PcrMask;
DEBUG ((DEBUG_ERROR, "SyncPcrAllocationsAndPcrMask!\n"));
//
// Determine the current TPM support and the Platform PCR mask.
//
Status = Tpm2GetCapabilitySupportedAndActivePcrs (&TpmHashAlgorithmBitmap, &TpmActivePcrBanks);
ASSERT_EFI_ERROR (Status);
DEBUG ((DEBUG_INFO, "Tpm2GetCapabilitySupportedAndActivePcrs - TpmHashAlgorithmBitmap: 0x%08x\n", TpmHashAlgorithmBitmap));
DEBUG ((DEBUG_INFO, "Tpm2GetCapabilitySupportedAndActivePcrs - TpmActivePcrBanks 0x%08x\n", TpmActivePcrBanks));
Tpm2PcrMask = PcdGet32 (PcdTpm2HashMask);
if (Tpm2PcrMask == 0) {
//
// If PcdTpm2HashMask is zero, use ActivePcr setting.
// Only when PcdTpm2HashMask is initialized to 0, will it be updated to current Active Pcrs.
//
PcdSet32S (PcdTpm2HashMask, TpmActivePcrBanks);
Tpm2PcrMask = TpmActivePcrBanks;
}
DEBUG ((DEBUG_INFO, "Tpm2PcrMask 0x%08x\n", Tpm2PcrMask));
//
// The Active PCRs in the TPM need to be a strict subset of the hashing algorithms supported by BIOS.
//
// * Find the intersection of Pcd support and TPM active PCRs. If banks are missing from the TPM support
// that are in the PCD, update the PCD.
// * Find intersection of TPM Active PCRs and BIOS supported algorithms. If there are active PCR banks
// that are not supported by the platform, update the TPM allocations and reboot.
// Note: When the HashLibBaseCryptoRouter solution is used, the hash algorithm support from BIOS is reported
// by Tcg2HashAlgorithmBitmap, which is populated by HashLib instances at runtime.
BiosHashAlgorithmBitmap = PcdGet32 (PcdTcg2HashAlgorithmBitmap);
DEBUG ((DEBUG_INFO, "Tcg2HashAlgorithmBitmap: 0x%08x\n", BiosHashAlgorithmBitmap));
if (((TpmActivePcrBanks & Tpm2PcrMask) != TpmActivePcrBanks) ||
((TpmActivePcrBanks & BiosHashAlgorithmBitmap) != TpmActivePcrBanks))
{
DEBUG ((DEBUG_INFO, "TpmActivePcrBanks & Tpm2PcrMask = 0x%08x\n", (TpmActivePcrBanks & Tpm2PcrMask)));
DEBUG ((DEBUG_INFO, "TpmActivePcrBanks & BiosHashAlgorithmBitmap = 0x%08x\n", (TpmActivePcrBanks & BiosHashAlgorithmBitmap)));
NewTpmActivePcrBanks = TpmActivePcrBanks;
NewTpmActivePcrBanks &= Tpm2PcrMask;
NewTpmActivePcrBanks &= BiosHashAlgorithmBitmap;
DEBUG ((DEBUG_INFO, "NewTpmActivePcrBanks 0x%08x\n", NewTpmActivePcrBanks));
DEBUG ((DEBUG_INFO, "%a - Reallocating PCR banks from 0x%X to 0x%X.\n", __FUNCTION__, TpmActivePcrBanks, NewTpmActivePcrBanks));
if (NewTpmActivePcrBanks == 0) {
DEBUG ((DEBUG_ERROR, "%a - No viable PCRs active! Please set a less restrictive value for PcdTpm2HashMask!\n", __FUNCTION__));
ASSERT (FALSE);
} else {
DEBUG ((DEBUG_ERROR, "Tpm2PcrAllocateBanks (TpmHashAlgorithmBitmap: 0x%08x, NewTpmActivePcrBanks: 0x%08x)\n", TpmHashAlgorithmBitmap, NewTpmActivePcrBanks));
Status = Tpm2PcrAllocateBanks (NULL, (UINT32)TpmHashAlgorithmBitmap, NewTpmActivePcrBanks);
if (EFI_ERROR (Status)) {
//
// We can't do much here, but we hope that this doesn't happen.
//
DEBUG ((DEBUG_ERROR, "%a - Failed to reallocate PCRs!\n", __FUNCTION__));
ASSERT_EFI_ERROR (Status);
}
//
// Need reset system, since we just called Tpm2PcrAllocateBanks().
//
ResetCold ();
}
}
//
// If there are any PCRs that claim support in the Platform mask that are
// not supported by the TPM, update the mask.
//
if ((Tpm2PcrMask & TpmHashAlgorithmBitmap) != Tpm2PcrMask) {
NewTpm2PcrMask = Tpm2PcrMask & TpmHashAlgorithmBitmap;
DEBUG ((DEBUG_INFO, "%a - Updating PcdTpm2HashMask from 0x%X to 0x%X.\n", __FUNCTION__, Tpm2PcrMask, NewTpm2PcrMask));
if (NewTpm2PcrMask == 0) {
DEBUG ((DEBUG_ERROR, "%a - No viable PCRs supported! Please set a less restrictive value for PcdTpm2HashMask!\n", __FUNCTION__));
ASSERT (FALSE);
}
Status = PcdSet32S (PcdTpm2HashMask, NewTpm2PcrMask);
DEBUG ((DEBUG_ERROR, "Set PcdTpm2Hash Mask to 0x%08x\n", NewTpm2PcrMask));
ASSERT_EFI_ERROR (Status);
}
}
/**
Add a new entry to the Event Log.
@param[in] DigestList A list of digest.
@param[in,out] NewEventHdr Pointer to a TCG_PCR_EVENT_HDR data structure.
@param[in] NewEventData Pointer to the new event data.
@retval EFI_SUCCESS The new event log entry was added.
@retval EFI_OUT_OF_RESOURCES No enough memory to log the new event.
**/
EFI_STATUS
LogHashEvent (
IN TPML_DIGEST_VALUES *DigestList,
IN OUT TCG_PCR_EVENT_HDR *NewEventHdr,
IN UINT8 *NewEventData
)
{
VOID *HobData;
EFI_STATUS Status;
UINTN Index;
EFI_STATUS RetStatus;
UINT32 SupportedEventLogs;
TCG_PCR_EVENT2 *TcgPcrEvent2;
UINT8 *DigestBuffer;
SupportedEventLogs = EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2 | EFI_TCG2_EVENT_LOG_FORMAT_TCG_2;
RetStatus = EFI_SUCCESS;
for (Index = 0; Index < sizeof (mTcg2EventInfo)/sizeof (mTcg2EventInfo[0]); Index++) {
if ((SupportedEventLogs & mTcg2EventInfo[Index].LogFormat) != 0) {
DEBUG ((DEBUG_INFO, " LogFormat - 0x%08x\n", mTcg2EventInfo[Index].LogFormat));
switch (mTcg2EventInfo[Index].LogFormat) {
case EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2:
Status = GetDigestFromDigestList (TPM_ALG_SHA1, DigestList, &NewEventHdr->Digest);
if (!EFI_ERROR (Status)) {
HobData = BuildGuidHob (
&gTcgEventEntryHobGuid,
sizeof (*NewEventHdr) + NewEventHdr->EventSize
);
if (HobData == NULL) {
RetStatus = EFI_OUT_OF_RESOURCES;
break;
}
CopyMem (HobData, NewEventHdr, sizeof (*NewEventHdr));
HobData = (VOID *)((UINT8 *)HobData + sizeof (*NewEventHdr));
CopyMem (HobData, NewEventData, NewEventHdr->EventSize);
}
break;
case EFI_TCG2_EVENT_LOG_FORMAT_TCG_2:
//
// Use GetDigestListSize (DigestList) in the GUID HOB DataLength calculation
// to reserve enough buffer to hold TPML_DIGEST_VALUES compact binary.
//
HobData = BuildGuidHob (
&gTcgEvent2EntryHobGuid,
sizeof (TcgPcrEvent2->PCRIndex) + sizeof (TcgPcrEvent2->EventType) + GetDigestListSize (DigestList) + sizeof (TcgPcrEvent2->EventSize) + NewEventHdr->EventSize
);
if (HobData == NULL) {
RetStatus = EFI_OUT_OF_RESOURCES;
break;
}
TcgPcrEvent2 = HobData;
TcgPcrEvent2->PCRIndex = NewEventHdr->PCRIndex;
TcgPcrEvent2->EventType = NewEventHdr->EventType;
DigestBuffer = (UINT8 *)&TcgPcrEvent2->Digest;
DigestBuffer = CopyDigestListToBuffer (DigestBuffer, DigestList, PcdGet32 (PcdTpm2HashMask));
CopyMem (DigestBuffer, &NewEventHdr->EventSize, sizeof (TcgPcrEvent2->EventSize));
DigestBuffer = DigestBuffer + sizeof (TcgPcrEvent2->EventSize);
CopyMem (DigestBuffer, NewEventData, NewEventHdr->EventSize);
break;
}
}
}
return RetStatus;
}
/**
Do a hash operation on a data buffer, extend a specific TPM PCR with the hash result,
and build a GUIDed HOB recording the event which will be passed to the DXE phase and
added into the Event Log.
@param[in] This Indicates the calling context
@param[in] Flags Bitmap providing additional information.
@param[in] HashData If BIT0 of Flags is 0, it is physical address of the
start of the data buffer to be hashed, extended, and logged.
If BIT0 of Flags is 1, it is physical address of the
start of the pre-hash data buffter to be extended, and logged.
The pre-hash data format is TPML_DIGEST_VALUES.
@param[in] HashDataLen The length, in bytes, of the buffer referenced by HashData.
@param[in] NewEventHdr Pointer to a TCG_PCR_EVENT_HDR data structure.
@param[in] NewEventData Pointer to the new event data.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES No enough memory to log the new event.
@retval EFI_DEVICE_ERROR The command was unsuccessful.
**/
EFI_STATUS
EFIAPI
HashLogExtendEvent (
IN EDKII_TCG_PPI *This,
IN UINT64 Flags,
IN UINT8 *HashData,
IN UINTN HashDataLen,
IN TCG_PCR_EVENT_HDR *NewEventHdr,
IN UINT8 *NewEventData
)
{
EFI_STATUS Status;
TPML_DIGEST_VALUES DigestList;
if (GetFirstGuidHob (&gTpmErrorHobGuid) != NULL) {
return EFI_DEVICE_ERROR;
}
if (((Flags & EDKII_TCG_PRE_HASH) != 0) || ((Flags & EDKII_TCG_PRE_HASH_LOG_ONLY) != 0)) {
ZeroMem (&DigestList, sizeof (DigestList));
CopyMem (&DigestList, HashData, sizeof (DigestList));
Status = EFI_SUCCESS;
if ((Flags & EDKII_TCG_PRE_HASH) != 0 ) {
Status = Tpm2PcrExtend (
NewEventHdr->PCRIndex,
&DigestList
);
}
} else {
Status = HashAndExtend (
NewEventHdr->PCRIndex,
HashData,
HashDataLen,
&DigestList
);
}
if (!EFI_ERROR (Status)) {
Status = LogHashEvent (&DigestList, NewEventHdr, NewEventData);
}
if (Status == EFI_DEVICE_ERROR) {
DEBUG ((DEBUG_ERROR, "HashLogExtendEvent - %r. Disable TPM.\n", Status));
BuildGuidHob (&gTpmErrorHobGuid, 0);
REPORT_STATUS_CODE (
EFI_ERROR_CODE | EFI_ERROR_MINOR,
(PcdGet32 (PcdStatusCodeSubClassTpmDevice) | EFI_P_EC_INTERFACE_ERROR)
);
}
return Status;
}
/**
Measure CRTM version.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES No enough memory to log the new event.
@retval EFI_DEVICE_ERROR The command was unsuccessful.
**/
EFI_STATUS
MeasureCRTMVersion (
VOID
)
{
TCG_PCR_EVENT_HDR TcgEventHdr;
//
// Use FirmwareVersion string to represent CRTM version.
// OEMs should get real CRTM version string and measure it.
//
TcgEventHdr.PCRIndex = 0;
TcgEventHdr.EventType = EV_S_CRTM_VERSION;
TcgEventHdr.EventSize = (UINT32)StrSize ((CHAR16 *)PcdGetPtr (PcdFirmwareVersionString));
return HashLogExtendEvent (
&mEdkiiTcgPpi,
0,
(UINT8 *)PcdGetPtr (PcdFirmwareVersionString),
TcgEventHdr.EventSize,
&TcgEventHdr,
(UINT8 *)PcdGetPtr (PcdFirmwareVersionString)
);
}
/**
Get the FvName from the FV header.
Causion: The FV is untrusted input.
@param[in] FvBase Base address of FV image.
@param[in] FvLength Length of FV image.
@return FvName pointer
@retval NULL FvName is NOT found
**/
VOID *
GetFvName (
IN EFI_PHYSICAL_ADDRESS FvBase,
IN UINT64 FvLength
)
{
EFI_FIRMWARE_VOLUME_HEADER *FvHeader;
EFI_FIRMWARE_VOLUME_EXT_HEADER *FvExtHeader;
if (FvBase >= MAX_ADDRESS) {
return NULL;
}
if (FvLength >= MAX_ADDRESS - FvBase) {
return NULL;
}
if (FvLength < sizeof (EFI_FIRMWARE_VOLUME_HEADER)) {
return NULL;
}
FvHeader = (EFI_FIRMWARE_VOLUME_HEADER *)(UINTN)FvBase;
if (FvHeader->ExtHeaderOffset < sizeof (EFI_FIRMWARE_VOLUME_HEADER)) {
return NULL;
}
if (FvHeader->ExtHeaderOffset + sizeof (EFI_FIRMWARE_VOLUME_EXT_HEADER) > FvLength) {
return NULL;
}
FvExtHeader = (EFI_FIRMWARE_VOLUME_EXT_HEADER *)(UINTN)(FvBase + FvHeader->ExtHeaderOffset);
return &FvExtHeader->FvName;
}
/**
Measure FV image.
Add it into the measured FV list after the FV is measured successfully.
@param[in] FvBase Base address of FV image.
@param[in] FvLength Length of FV image.
@retval EFI_SUCCESS Fv image is measured successfully
or it has been already measured.
@retval EFI_OUT_OF_RESOURCES No enough memory to log the new event.
@retval EFI_DEVICE_ERROR The command was unsuccessful.
**/
EFI_STATUS
MeasureFvImage (
IN EFI_PHYSICAL_ADDRESS FvBase,
IN UINT64 FvLength
)
{
UINT32 Index;
EFI_STATUS Status;
EFI_PLATFORM_FIRMWARE_BLOB FvBlob;
FV_HANDOFF_TABLE_POINTERS2 FvBlob2;
VOID *EventData;
VOID *FvName;
TCG_PCR_EVENT_HDR TcgEventHdr;
UINT32 Instance;
UINT32 Tpm2HashMask;
TPML_DIGEST_VALUES DigestList;
UINT32 DigestCount;
EFI_PEI_FIRMWARE_VOLUME_INFO_MEASUREMENT_EXCLUDED_PPI *MeasurementExcludedFvPpi;
EDKII_PEI_FIRMWARE_VOLUME_INFO_PREHASHED_FV_PPI *PrehashedFvPpi;
HASH_INFO *PreHashInfo;
UINT32 HashAlgoMask;
EFI_PHYSICAL_ADDRESS FvOrgBase;
EFI_PHYSICAL_ADDRESS FvDataBase;
EFI_PEI_HOB_POINTERS Hob;
EDKII_MIGRATED_FV_INFO *MigratedFvInfo;
//
// Check Excluded FV list
//
Instance = 0;
do {
Status = PeiServicesLocatePpi (
&gEfiPeiFirmwareVolumeInfoMeasurementExcludedPpiGuid,
Instance,
NULL,
(VOID **)&MeasurementExcludedFvPpi
);
if (!EFI_ERROR (Status)) {
for (Index = 0; Index < MeasurementExcludedFvPpi->Count; Index++) {
if ( (MeasurementExcludedFvPpi->Fv[Index].FvBase == FvBase)
&& (MeasurementExcludedFvPpi->Fv[Index].FvLength == FvLength))
{
DEBUG ((DEBUG_INFO, "The FV which is excluded by Tcg2Pei starts at: 0x%x\n", FvBase));
DEBUG ((DEBUG_INFO, "The FV which is excluded by Tcg2Pei has the size: 0x%x\n", FvLength));
return EFI_SUCCESS;
}
}
Instance++;
}
} while (!EFI_ERROR (Status));
//
// Check measured FV list
//
for (Index = 0; Index < mMeasuredBaseFvIndex; Index++) {
if ((mMeasuredBaseFvInfo[Index].BlobBase == FvBase) && (mMeasuredBaseFvInfo[Index].BlobLength == FvLength)) {
DEBUG ((DEBUG_INFO, "The FV which is already measured by Tcg2Pei starts at: 0x%x\n", FvBase));
DEBUG ((DEBUG_INFO, "The FV which is already measured by Tcg2Pei has the size: 0x%x\n", FvLength));
return EFI_SUCCESS;
}
}
//
// Check pre-hashed FV list
//
Instance = 0;
Tpm2HashMask = PcdGet32 (PcdTpm2HashMask);
do {
Status = PeiServicesLocatePpi (
&gEdkiiPeiFirmwareVolumeInfoPrehashedFvPpiGuid,
Instance,
NULL,
(VOID **)&PrehashedFvPpi
);
if (!EFI_ERROR (Status) && (PrehashedFvPpi->FvBase == FvBase) && (PrehashedFvPpi->FvLength == FvLength)) {
ZeroMem (&DigestList, sizeof (TPML_DIGEST_VALUES));
//
// The FV is prehashed, check against TPM hash mask
//
PreHashInfo = (HASH_INFO *)(PrehashedFvPpi + 1);
for (Index = 0, DigestCount = 0; Index < PrehashedFvPpi->Count; Index++) {
DEBUG ((DEBUG_INFO, "Hash Algo ID in PrehashedFvPpi=0x%x\n", PreHashInfo->HashAlgoId));
HashAlgoMask = GetHashMaskFromAlgo (PreHashInfo->HashAlgoId);
if ((Tpm2HashMask & HashAlgoMask) != 0 ) {
//
// Hash is required, copy it to DigestList
//
WriteUnaligned16 (&(DigestList.digests[DigestCount].hashAlg), PreHashInfo->HashAlgoId);
CopyMem (
&DigestList.digests[DigestCount].digest,
PreHashInfo + 1,
PreHashInfo->HashSize
);
DigestCount++;
//
// Clean the corresponding Hash Algo mask bit
//
Tpm2HashMask &= ~HashAlgoMask;
}
PreHashInfo = (HASH_INFO *)((UINT8 *)(PreHashInfo + 1) + PreHashInfo->HashSize);
}
WriteUnaligned32 (&DigestList.count, DigestCount);
break;
}
Instance++;
} while (!EFI_ERROR (Status));
//
// Search the matched migration FV info
//
FvOrgBase = FvBase;
FvDataBase = FvBase;
Hob.Raw = GetFirstGuidHob (&gEdkiiMigratedFvInfoGuid);
while (Hob.Raw != NULL) {
MigratedFvInfo = GET_GUID_HOB_DATA (Hob);
if ((MigratedFvInfo->FvNewBase == (UINT32)FvBase) && (MigratedFvInfo->FvLength == (UINT32)FvLength)) {
//
// Found the migrated FV info
//
FvOrgBase = (EFI_PHYSICAL_ADDRESS)(UINTN)MigratedFvInfo->FvOrgBase;
FvDataBase = (EFI_PHYSICAL_ADDRESS)(UINTN)MigratedFvInfo->FvDataBase;
break;
}
Hob.Raw = GET_NEXT_HOB (Hob);
Hob.Raw = GetNextGuidHob (&gEdkiiMigratedFvInfoGuid, Hob.Raw);
}
//
// Init the log event for FV measurement
//
if (PcdGet32 (PcdTcgPfpMeasurementRevision) >= TCG_EfiSpecIDEventStruct_SPEC_ERRATA_TPM2_REV_105) {
FvBlob2.BlobDescriptionSize = sizeof (FvBlob2.BlobDescription);
CopyMem (FvBlob2.BlobDescription, FV_HANDOFF_TABLE_DESC, sizeof (FvBlob2.BlobDescription));
FvName = GetFvName (FvBase, FvLength);
if (FvName != NULL) {
AsciiSPrint ((CHAR8 *)FvBlob2.BlobDescription, sizeof (FvBlob2.BlobDescription), "Fv(%g)", FvName);
}
FvBlob2.BlobBase = FvOrgBase;
FvBlob2.BlobLength = FvLength;
TcgEventHdr.PCRIndex = 0;
TcgEventHdr.EventType = EV_EFI_PLATFORM_FIRMWARE_BLOB2;
TcgEventHdr.EventSize = sizeof (FvBlob2);
EventData = &FvBlob2;
} else {
FvBlob.BlobBase = FvOrgBase;
FvBlob.BlobLength = FvLength;
TcgEventHdr.PCRIndex = 0;
TcgEventHdr.EventType = EV_EFI_PLATFORM_FIRMWARE_BLOB;
TcgEventHdr.EventSize = sizeof (FvBlob);
EventData = &FvBlob;
}
if (Tpm2HashMask == 0) {
//
// FV pre-hash algos comply with current TPM hash requirement
// Skip hashing step in measure, only extend DigestList to PCR and log event
//
Status = HashLogExtendEvent (
&mEdkiiTcgPpi,
EDKII_TCG_PRE_HASH,
(UINT8 *)&DigestList, // HashData
(UINTN)sizeof (DigestList), // HashDataLen
&TcgEventHdr, // EventHdr
EventData // EventData
);
DEBUG ((DEBUG_INFO, "The pre-hashed FV which is extended & logged by Tcg2Pei starts at: 0x%x\n", FvBase));
DEBUG ((DEBUG_INFO, "The pre-hashed FV which is extended & logged by Tcg2Pei has the size: 0x%x\n", FvLength));
} else {
//
// Hash the FV, extend digest to the TPM and log TCG event
//
Status = HashLogExtendEvent (
&mEdkiiTcgPpi,
0,
(UINT8 *)(UINTN)FvDataBase, // HashData
(UINTN)FvLength, // HashDataLen
&TcgEventHdr, // EventHdr
EventData // EventData
);
DEBUG ((DEBUG_INFO, "The FV which is measured by Tcg2Pei starts at: 0x%x\n", FvBase));
DEBUG ((DEBUG_INFO, "The FV which is measured by Tcg2Pei has the size: 0x%x\n", FvLength));
}
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "The FV which failed to be measured starts at: 0x%x\n", FvBase));
return Status;
}
//
// Add new FV into the measured FV list.
//
if (mMeasuredBaseFvIndex >= mMeasuredMaxBaseFvIndex) {
mMeasuredBaseFvInfo = ReallocatePool (
sizeof (EFI_PLATFORM_FIRMWARE_BLOB) * mMeasuredMaxBaseFvIndex,
sizeof (EFI_PLATFORM_FIRMWARE_BLOB) * (mMeasuredMaxBaseFvIndex + FIRMWARE_BLOB_GROWTH_STEP),
mMeasuredBaseFvInfo
);
ASSERT (mMeasuredBaseFvInfo != NULL);
mMeasuredMaxBaseFvIndex = mMeasuredMaxBaseFvIndex + FIRMWARE_BLOB_GROWTH_STEP;
}
mMeasuredBaseFvInfo[mMeasuredBaseFvIndex].BlobBase = FvBase;
mMeasuredBaseFvInfo[mMeasuredBaseFvIndex].BlobLength = FvLength;
mMeasuredBaseFvIndex++;
return Status;
}
/**
Measure main BIOS.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES No enough memory to log the new event.
@retval EFI_DEVICE_ERROR The command was unsuccessful.
**/
EFI_STATUS
MeasureMainBios (
VOID
)
{
EFI_STATUS Status;
EFI_PEI_FV_HANDLE VolumeHandle;
EFI_FV_INFO VolumeInfo;
EFI_PEI_FIRMWARE_VOLUME_PPI *FvPpi;
PERF_START_EX (mFileHandle, "EventRec", "Tcg2Pei", 0, PERF_ID_TCG2_PEI);
//
// Only measure BFV at the very beginning. Other parts of Static Core Root of
// Trust for Measurement(S-CRTM) will be measured later on FvInfoNotify.
// BFV is processed without installing FV Info Ppi. Other FVs either inside BFV or
// reported by platform will be installed with Fv Info Ppi
// This firmware volume measure policy can be modified/enhanced by special
// platform for special CRTM TPM measuring.
//
Status = PeiServicesFfsFindNextVolume (0, &VolumeHandle);
ASSERT_EFI_ERROR (Status);
//
// Measure and record the firmware volume that is dispatched by PeiCore
//
Status = PeiServicesFfsGetVolumeInfo (VolumeHandle, &VolumeInfo);
ASSERT_EFI_ERROR (Status);
//
// Locate the corresponding FV_PPI according to founded FV's format guid
//
Status = PeiServicesLocatePpi (
&VolumeInfo.FvFormat,
0,
NULL,
(VOID **)&FvPpi
);
ASSERT_EFI_ERROR (Status);
Status = MeasureFvImage ((EFI_PHYSICAL_ADDRESS)(UINTN)VolumeInfo.FvStart, VolumeInfo.FvSize);
PERF_END_EX (mFileHandle, "EventRec", "Tcg2Pei", 0, PERF_ID_TCG2_PEI + 1);
return Status;
}
/**
Measure and record the Firmware Volume Information once FvInfoPPI install.
@param[in] PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.
@param[in] NotifyDescriptor Address of the notification descriptor data structure.
@param[in] Ppi Address of the PPI that was installed.
@retval EFI_SUCCESS The FV Info is measured and recorded to TPM.
@return Others Fail to measure FV.
**/
EFI_STATUS
EFIAPI
FirmwareVolumeInfoPpiNotifyCallback (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,
IN VOID *Ppi
)
{
EFI_PEI_FIRMWARE_VOLUME_INFO_PPI *Fv;
EFI_STATUS Status;
EFI_PEI_FIRMWARE_VOLUME_PPI *FvPpi;
UINTN Index;
Fv = (EFI_PEI_FIRMWARE_VOLUME_INFO_PPI *)Ppi;
//
// The PEI Core can not dispatch or load files from memory mapped FVs that do not support FvPpi.
//
Status = PeiServicesLocatePpi (
&Fv->FvFormat,
0,
NULL,
(VOID **)&FvPpi
);
if (EFI_ERROR (Status)) {
return EFI_SUCCESS;
}
//
// This is an FV from an FFS file, and the parent FV must have already been measured,
// No need to measure twice, so just record the FV and return
//
if ((Fv->ParentFvName != NULL) || (Fv->ParentFileName != NULL)) {
if (mMeasuredChildFvIndex >= mMeasuredMaxChildFvIndex) {
mMeasuredChildFvInfo = ReallocatePool (
sizeof (EFI_PLATFORM_FIRMWARE_BLOB) * mMeasuredMaxChildFvIndex,
sizeof (EFI_PLATFORM_FIRMWARE_BLOB) * (mMeasuredMaxChildFvIndex + FIRMWARE_BLOB_GROWTH_STEP),
mMeasuredChildFvInfo
);
ASSERT (mMeasuredChildFvInfo != NULL);
mMeasuredMaxChildFvIndex = mMeasuredMaxChildFvIndex + FIRMWARE_BLOB_GROWTH_STEP;
}
//
// Check whether FV is in the measured child FV list.
//
for (Index = 0; Index < mMeasuredChildFvIndex; Index++) {
if (mMeasuredChildFvInfo[Index].BlobBase == (EFI_PHYSICAL_ADDRESS)(UINTN)Fv->FvInfo) {
return EFI_SUCCESS;
}
}
mMeasuredChildFvInfo[mMeasuredChildFvIndex].BlobBase = (EFI_PHYSICAL_ADDRESS)(UINTN)Fv->FvInfo;
mMeasuredChildFvInfo[mMeasuredChildFvIndex].BlobLength = Fv->FvInfoSize;
mMeasuredChildFvIndex++;
return EFI_SUCCESS;
}
return MeasureFvImage ((EFI_PHYSICAL_ADDRESS)(UINTN)Fv->FvInfo, Fv->FvInfoSize);
}
/**
Do measurement after memory is ready.
@param[in] PeiServices Describes the list of possible PEI Services.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_OUT_OF_RESOURCES No enough memory to log the new event.
@retval EFI_DEVICE_ERROR The command was unsuccessful.
**/
EFI_STATUS
PeimEntryMP (
IN EFI_PEI_SERVICES **PeiServices
)
{
EFI_STATUS Status;
//
// install Tcg Services
//
Status = PeiServicesInstallPpi (&mTcgPpiList);
ASSERT_EFI_ERROR (Status);
if (PcdGet8 (PcdTpm2ScrtmPolicy) == 1) {
Status = MeasureCRTMVersion ();
}
Status = MeasureMainBios ();
if (EFI_ERROR (Status)) {
return Status;
}
//
// Post callbacks:
// for the FvInfoPpi services to measure and record
// the additional Fvs to TPM
//
Status = PeiServicesNotifyPpi (&mNotifyList[0]);
ASSERT_EFI_ERROR (Status);
return Status;
}
/**
Measure and log Separator event with error, and extend the measurement result into a specific PCR.
@param[in] PCRIndex PCR index.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
MeasureSeparatorEventWithError (
IN TPM_PCRINDEX PCRIndex
)
{
TCG_PCR_EVENT_HDR TcgEvent;
UINT32 EventData;
//
// Use EventData 0x1 to indicate there is error.
//
EventData = 0x1;
TcgEvent.PCRIndex = PCRIndex;
TcgEvent.EventType = EV_SEPARATOR;
TcgEvent.EventSize = (UINT32)sizeof (EventData);
return HashLogExtendEvent (&mEdkiiTcgPpi, 0, (UINT8 *)&EventData, TcgEvent.EventSize, &TcgEvent, (UINT8 *)&EventData);
}
/**
Entry point of this module.
@param[in] FileHandle Handle of the file being invoked.
@param[in] PeiServices Describes the list of possible PEI Services.
@return Status.
**/
EFI_STATUS
EFIAPI
PeimEntryMA (
IN EFI_PEI_FILE_HANDLE FileHandle,
IN CONST EFI_PEI_SERVICES **PeiServices
)
{
EFI_STATUS Status;
EFI_STATUS Status2;
EFI_BOOT_MODE BootMode;
TPM_PCRINDEX PcrIndex;
BOOLEAN S3ErrorReport;
if (CompareGuid (PcdGetPtr (PcdTpmInstanceGuid), &gEfiTpmDeviceInstanceNoneGuid) ||
CompareGuid (PcdGetPtr (PcdTpmInstanceGuid), &gEfiTpmDeviceInstanceTpm12Guid))
{
DEBUG ((DEBUG_INFO, "No TPM2 instance required!\n"));
return EFI_UNSUPPORTED;
}
if (GetFirstGuidHob (&gTpmErrorHobGuid) != NULL) {
DEBUG ((DEBUG_ERROR, "TPM2 error!\n"));
return EFI_DEVICE_ERROR;
}
Status = PeiServicesGetBootMode (&BootMode);
ASSERT_EFI_ERROR (Status);
//
// In S3 path, skip shadow logic. no measurement is required
//
if (BootMode != BOOT_ON_S3_RESUME) {
Status = (**PeiServices).RegisterForShadow (FileHandle);
if (Status == EFI_ALREADY_STARTED) {
mImageInMemory = TRUE;
mFileHandle = FileHandle;
} else if (Status == EFI_NOT_FOUND) {
ASSERT_EFI_ERROR (Status);
}
}
if (!mImageInMemory) {
//
// Initialize TPM device
//
Status = Tpm2RequestUseTpm ();
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "TPM2 not detected!\n"));
goto Done;
}
S3ErrorReport = FALSE;
if (PcdGet8 (PcdTpm2InitializationPolicy) == 1) {
if (BootMode == BOOT_ON_S3_RESUME) {
Status = Tpm2Startup (TPM_SU_STATE);
if (EFI_ERROR (Status)) {
Status = Tpm2Startup (TPM_SU_CLEAR);
if (!EFI_ERROR (Status)) {
S3ErrorReport = TRUE;
}
}
} else {
Status = Tpm2Startup (TPM_SU_CLEAR);
}
if (EFI_ERROR (Status)) {
goto Done;
}
}
//
// Update Tpm2HashMask according to PCR bank.
//
SyncPcrAllocationsAndPcrMask ();
if (S3ErrorReport) {
//
// The system firmware that resumes from S3 MUST deal with a
// TPM2_Startup error appropriately.
// For example, issue a TPM2_Startup(TPM_SU_CLEAR) command and
// configuring the device securely by taking actions like extending a
// separator with an error digest (0x01) into PCRs 0 through 7.
//
for (PcrIndex = 0; PcrIndex < 8; PcrIndex++) {
Status = MeasureSeparatorEventWithError (PcrIndex);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Separator Event with Error not Measured. Error!\n"));
}
}
}
//
// TpmSelfTest is optional on S3 path, skip it to save S3 time
//
if (BootMode != BOOT_ON_S3_RESUME) {
if (PcdGet8 (PcdTpm2SelfTestPolicy) == 1) {
Status = Tpm2SelfTest (NO);
if (EFI_ERROR (Status)) {
goto Done;
}
}
}
DEBUG_CODE_BEGIN ();
//
// Peek into TPM PCR 00 before any BIOS measurement.
//
Tpm2PcrReadForActiveBank (00, NULL);
DEBUG_CODE_END ();
//
// Only install TpmInitializedPpi on success
//
Status = PeiServicesInstallPpi (&mTpmInitializedPpiList);
ASSERT_EFI_ERROR (Status);
}
if (mImageInMemory) {
Status = PeimEntryMP ((EFI_PEI_SERVICES **)PeiServices);
return Status;
}
Done:
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "TPM2 error! Build Hob\n"));
BuildGuidHob (&gTpmErrorHobGuid, 0);
REPORT_STATUS_CODE (
EFI_ERROR_CODE | EFI_ERROR_MINOR,
(PcdGet32 (PcdStatusCodeSubClassTpmDevice) | EFI_P_EC_INTERFACE_ERROR)
);
}
//
// Always install TpmInitializationDonePpi no matter success or fail.
// Other driver can know TPM initialization state by TpmInitializedPpi.
//
Status2 = PeiServicesInstallPpi (&mTpmInitializationDonePpiList);
ASSERT_EFI_ERROR (Status2);
return Status;
}
|