summaryrefslogtreecommitdiffstats
path: root/SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.c
blob: 2dc6d11e39ad4aa3e2f5f7c9b5061e856e997902 (plain)
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
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
/** @file
  This module implements Tcg2 Protocol.

Copyright (c) 2015 - 2019, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include <PiDxe.h>
#include <IndustryStandard/Acpi.h>
#include <IndustryStandard/PeImage.h>
#include <IndustryStandard/TcpaAcpi.h>

#include <Guid/GlobalVariable.h>
#include <Guid/HobList.h>
#include <Guid/TcgEventHob.h>
#include <Guid/EventGroup.h>
#include <Guid/EventExitBootServiceFailed.h>
#include <Guid/ImageAuthentication.h>
#include <Guid/TpmInstance.h>

#include <Protocol/DevicePath.h>
#include <Protocol/MpService.h>
#include <Protocol/VariableWrite.h>
#include <Protocol/Tcg2Protocol.h>
#include <Protocol/TrEEProtocol.h>
#include <Protocol/ResetNotification.h>

#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/HobLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/BaseLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/PrintLib.h>
#include <Library/Tpm2CommandLib.h>
#include <Library/PcdLib.h>
#include <Library/UefiLib.h>
#include <Library/Tpm2DeviceLib.h>
#include <Library/HashLib.h>
#include <Library/PerformanceLib.h>
#include <Library/ReportStatusCodeLib.h>
#include <Library/Tcg2PhysicalPresenceLib.h>

#define PERF_ID_TCG2_DXE  0x3120

typedef struct {
  CHAR16                                 *VariableName;
  EFI_GUID                               *VendorGuid;
} VARIABLE_TYPE;

#define  TCG2_DEFAULT_MAX_COMMAND_SIZE        0x1000
#define  TCG2_DEFAULT_MAX_RESPONSE_SIZE       0x1000

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},
};

#define TCG_EVENT_LOG_AREA_COUNT_MAX   2

typedef struct {
  EFI_TCG2_EVENT_LOG_FORMAT         EventLogFormat;
  EFI_PHYSICAL_ADDRESS              Lasa;
  UINT64                            Laml;
  UINTN                             EventLogSize;
  UINT8                             *LastEvent;
  BOOLEAN                           EventLogStarted;
  BOOLEAN                           EventLogTruncated;
  UINTN                             Next800155EventOffset;
} TCG_EVENT_LOG_AREA_STRUCT;

typedef struct _TCG_DXE_DATA {
  EFI_TCG2_BOOT_SERVICE_CAPABILITY  BsCap;
  TCG_EVENT_LOG_AREA_STRUCT         EventLogAreaStruct[TCG_EVENT_LOG_AREA_COUNT_MAX];
  BOOLEAN                           GetEventLogCalled[TCG_EVENT_LOG_AREA_COUNT_MAX];
  TCG_EVENT_LOG_AREA_STRUCT         FinalEventLogAreaStruct[TCG_EVENT_LOG_AREA_COUNT_MAX];
  EFI_TCG2_FINAL_EVENTS_TABLE       *FinalEventsTable[TCG_EVENT_LOG_AREA_COUNT_MAX];
} TCG_DXE_DATA;

TCG_DXE_DATA                 mTcgDxeData = {
  {
    sizeof (EFI_TCG2_BOOT_SERVICE_CAPABILITY),     // Size
    { 1, 1 },                           // StructureVersion
    { 1, 1 },                           // ProtocolVersion
    EFI_TCG2_BOOT_HASH_ALG_SHA1,        // HashAlgorithmBitmap
    EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2,  // SupportedEventLogs
    TRUE,                               // TPMPresentFlag
    TCG2_DEFAULT_MAX_COMMAND_SIZE,      // MaxCommandSize
    TCG2_DEFAULT_MAX_RESPONSE_SIZE,     // MaxResponseSize
    0,                                  // ManufacturerID
    0,  // NumberOfPCRBanks
    0,  // ActivePcrBanks
  },
};

UINTN  mBootAttempts  = 0;
CHAR16 mBootVarName[] = L"BootOrder";

VARIABLE_TYPE  mVariableType[] = {
  {EFI_SECURE_BOOT_MODE_NAME,    &gEfiGlobalVariableGuid},
  {EFI_PLATFORM_KEY_NAME,        &gEfiGlobalVariableGuid},
  {EFI_KEY_EXCHANGE_KEY_NAME,    &gEfiGlobalVariableGuid},
  {EFI_IMAGE_SECURITY_DATABASE,  &gEfiImageSecurityDatabaseGuid},
  {EFI_IMAGE_SECURITY_DATABASE1, &gEfiImageSecurityDatabaseGuid},
};

EFI_HANDLE mImageHandle;

/**
  Measure PE image into TPM log based on the authenticode image hashing in
  PE/COFF Specification 8.0 Appendix A.

  Caution: This function may receive untrusted input.
  PE/COFF image is external input, so this function will validate its data structure
  within this image buffer before use.

  Notes: PE/COFF image is checked by BasePeCoffLib PeCoffLoaderGetImageInfo().

  @param[in]  PCRIndex       TPM PCR index
  @param[in]  ImageAddress   Start address of image buffer.
  @param[in]  ImageSize      Image size
  @param[out] DigestList     Digest list of this image.

  @retval EFI_SUCCESS            Successfully measure image.
  @retval EFI_OUT_OF_RESOURCES   No enough resource to measure image.
  @retval other error value
**/
EFI_STATUS
MeasurePeImageAndExtend (
  IN  UINT32                    PCRIndex,
  IN  EFI_PHYSICAL_ADDRESS      ImageAddress,
  IN  UINTN                     ImageSize,
  OUT TPML_DIGEST_VALUES        *DigestList
  );

/**

  This function dump raw data.

  @param  Data  raw data
  @param  Size  raw data size

**/
VOID
InternalDumpData (
  IN UINT8  *Data,
  IN UINTN  Size
  )
{
  UINTN  Index;
  for (Index = 0; Index < Size; Index++) {
    DEBUG ((DEBUG_INFO, "%02x", (UINTN)Data[Index]));
  }
}

/**

  This function initialize TCG_PCR_EVENT2_HDR for EV_NO_ACTION Event Type other than EFI Specification ID event
  The behavior is defined by TCG PC Client PFP Spec. Section 9.3.4 EV_NO_ACTION Event Types

  @param[in, out]   NoActionEvent  Event Header of EV_NO_ACTION Event
  @param[in]        EventSize      Event Size of the EV_NO_ACTION Event

**/
VOID
InitNoActionEvent (
  IN OUT TCG_PCR_EVENT2_HDR  *NoActionEvent,
  IN UINT32                  EventSize
 )
{
  UINT32          DigestListCount;
  TPMI_ALG_HASH   HashAlgId;
  UINT8           *DigestBuffer;

  DigestBuffer    = (UINT8 *)NoActionEvent->Digests.digests;
  DigestListCount = 0;

  NoActionEvent->PCRIndex  = 0;
  NoActionEvent->EventType = EV_NO_ACTION;

  //
  // Set Hash count & hashAlg accordingly, while Digest.digests[n].digest to all 0
  //
  ZeroMem (&NoActionEvent->Digests, sizeof(NoActionEvent->Digests));

  if ((mTcgDxeData.BsCap.ActivePcrBanks & EFI_TCG2_BOOT_HASH_ALG_SHA1) != 0) {
     HashAlgId = TPM_ALG_SHA1;
     CopyMem (DigestBuffer, &HashAlgId, sizeof(TPMI_ALG_HASH));
     DigestBuffer += sizeof(TPMI_ALG_HASH) + GetHashSizeFromAlgo (HashAlgId);
     DigestListCount++;
  }

  if ((mTcgDxeData.BsCap.ActivePcrBanks & EFI_TCG2_BOOT_HASH_ALG_SHA256) != 0) {
     HashAlgId = TPM_ALG_SHA256;
     CopyMem (DigestBuffer, &HashAlgId, sizeof(TPMI_ALG_HASH));
     DigestBuffer += sizeof(TPMI_ALG_HASH) + GetHashSizeFromAlgo (HashAlgId);
     DigestListCount++;
  }

  if ((mTcgDxeData.BsCap.ActivePcrBanks & EFI_TCG2_BOOT_HASH_ALG_SHA384) != 0) {
    HashAlgId = TPM_ALG_SHA384;
    CopyMem (DigestBuffer, &HashAlgId, sizeof(TPMI_ALG_HASH));
    DigestBuffer += sizeof(TPMI_ALG_HASH) + GetHashSizeFromAlgo (HashAlgId);
    DigestListCount++;
  }

  if ((mTcgDxeData.BsCap.ActivePcrBanks & EFI_TCG2_BOOT_HASH_ALG_SHA512) != 0) {
    HashAlgId = TPM_ALG_SHA512;
    CopyMem (DigestBuffer, &HashAlgId, sizeof(TPMI_ALG_HASH));
    DigestBuffer += sizeof(TPMI_ALG_HASH) + GetHashSizeFromAlgo (HashAlgId);
    DigestListCount++;
  }

  if ((mTcgDxeData.BsCap.ActivePcrBanks & EFI_TCG2_BOOT_HASH_ALG_SM3_256) != 0) {
    HashAlgId = TPM_ALG_SM3_256;
    CopyMem (DigestBuffer, &HashAlgId, sizeof(TPMI_ALG_HASH));
    DigestBuffer += sizeof(TPMI_ALG_HASH) + GetHashSizeFromAlgo (HashAlgId);
    DigestListCount++;
  }

  //
  // Set Digests Count
  //
  WriteUnaligned32 ((UINT32 *)&NoActionEvent->Digests.count, DigestListCount);

  //
  // Set Event Size
  //
  WriteUnaligned32((UINT32 *)DigestBuffer, EventSize);
}

/**

  This function dump raw data with colume format.

  @param  Data  raw data
  @param  Size  raw data size

**/
VOID
InternalDumpHex (
  IN UINT8  *Data,
  IN UINTN  Size
  )
{
  UINTN   Index;
  UINTN   Count;
  UINTN   Left;

#define COLUME_SIZE  (16 * 2)

  Count = Size / COLUME_SIZE;
  Left  = Size % COLUME_SIZE;
  for (Index = 0; Index < Count; Index++) {
    DEBUG ((DEBUG_INFO, "%04x: ", Index * COLUME_SIZE));
    InternalDumpData (Data + Index * COLUME_SIZE, COLUME_SIZE);
    DEBUG ((DEBUG_INFO, "\n"));
  }

  if (Left != 0) {
    DEBUG ((DEBUG_INFO, "%04x: ", Index * COLUME_SIZE));
    InternalDumpData (Data + Index * COLUME_SIZE, Left);
    DEBUG ((DEBUG_INFO, "\n"));
  }
}

/**
  Get All processors EFI_CPU_LOCATION in system. LocationBuf is allocated inside the function
  Caller is responsible to free LocationBuf.

  @param[out] LocationBuf          Returns Processor Location Buffer.
  @param[out] Num                  Returns processor number.

  @retval EFI_SUCCESS              Operation completed successfully.
  @retval EFI_UNSUPPORTED       MpService protocol not found.

**/
EFI_STATUS
GetProcessorsCpuLocation (
    OUT  EFI_CPU_PHYSICAL_LOCATION   **LocationBuf,
    OUT  UINTN                       *Num
  )
{
  EFI_STATUS                        Status;
  EFI_MP_SERVICES_PROTOCOL          *MpProtocol;
  UINTN                             ProcessorNum;
  UINTN                             EnabledProcessorNum;
  EFI_PROCESSOR_INFORMATION         ProcessorInfo;
  EFI_CPU_PHYSICAL_LOCATION         *ProcessorLocBuf;
  UINTN                             Index;

  Status = gBS->LocateProtocol (&gEfiMpServiceProtocolGuid, NULL, (VOID **) &MpProtocol);
  if (EFI_ERROR (Status)) {
    //
    // MP protocol is not installed
    //
    return EFI_UNSUPPORTED;
  }

  Status = MpProtocol->GetNumberOfProcessors(
                         MpProtocol,
                         &ProcessorNum,
                         &EnabledProcessorNum
                         );
  if (EFI_ERROR(Status)){
    return Status;
  }

  Status = gBS->AllocatePool(
                  EfiBootServicesData,
                  sizeof(EFI_CPU_PHYSICAL_LOCATION) * ProcessorNum,
                  (VOID **) &ProcessorLocBuf
                  );
  if (EFI_ERROR(Status)){
    return Status;
  }

  //
  // Get each processor Location info
  //
  for (Index = 0; Index < ProcessorNum; Index++) {
    Status = MpProtocol->GetProcessorInfo(
                           MpProtocol,
                           Index,
                           &ProcessorInfo
                           );
    if (EFI_ERROR(Status)){
      FreePool(ProcessorLocBuf);
      return Status;
    }

    //
    // Get all Processor Location info & measure
    //
    CopyMem(
      &ProcessorLocBuf[Index],
      &ProcessorInfo.Location,
      sizeof(EFI_CPU_PHYSICAL_LOCATION)
      );
  }

  *LocationBuf = ProcessorLocBuf;
  *Num = ProcessorNum;

  return Status;
}

/**
  The EFI_TCG2_PROTOCOL GetCapability function call provides protocol
  capability information and state information.

  @param[in]      This               Indicates the calling context
  @param[in, out] ProtocolCapability The caller allocates memory for a EFI_TCG2_BOOT_SERVICE_CAPABILITY
                                     structure and sets the size field to the size of the structure allocated.
                                     The callee fills in the fields with the EFI protocol capability information
                                     and the current EFI TCG2 state information up to the number of fields which
                                     fit within the size of the structure passed in.

  @retval EFI_SUCCESS            Operation completed successfully.
  @retval EFI_DEVICE_ERROR       The command was unsuccessful.
                                 The ProtocolCapability variable will not be populated.
  @retval EFI_INVALID_PARAMETER  One or more of the parameters are incorrect.
                                 The ProtocolCapability variable will not be populated.
  @retval EFI_BUFFER_TOO_SMALL   The ProtocolCapability variable is too small to hold the full response.
                                 It will be partially populated (required Size field will be set).
**/
EFI_STATUS
EFIAPI
Tcg2GetCapability (
  IN EFI_TCG2_PROTOCOL                    *This,
  IN OUT EFI_TCG2_BOOT_SERVICE_CAPABILITY *ProtocolCapability
  )
{
  DEBUG ((DEBUG_VERBOSE, "Tcg2GetCapability ...\n"));

  if ((This == NULL) || (ProtocolCapability == NULL)) {
    return EFI_INVALID_PARAMETER;
  }

  DEBUG ((DEBUG_VERBOSE, "Size - 0x%x\n", ProtocolCapability->Size));
  DEBUG ((DEBUG_VERBOSE, " 1.1 - 0x%x, 1.0 - 0x%x\n", sizeof(EFI_TCG2_BOOT_SERVICE_CAPABILITY), sizeof(TREE_BOOT_SERVICE_CAPABILITY_1_0)));

  if (ProtocolCapability->Size < mTcgDxeData.BsCap.Size) {
    //
    // Handle the case that firmware support 1.1 but OS only support 1.0.
    //
    if ((mTcgDxeData.BsCap.ProtocolVersion.Major > 0x01) ||
        ((mTcgDxeData.BsCap.ProtocolVersion.Major == 0x01) && ((mTcgDxeData.BsCap.ProtocolVersion.Minor > 0x00)))) {
      if (ProtocolCapability->Size >= sizeof(TREE_BOOT_SERVICE_CAPABILITY_1_0)) {
        CopyMem (ProtocolCapability, &mTcgDxeData.BsCap, sizeof(TREE_BOOT_SERVICE_CAPABILITY_1_0));
        ProtocolCapability->Size = sizeof(TREE_BOOT_SERVICE_CAPABILITY_1_0);
        ProtocolCapability->StructureVersion.Major = 1;
        ProtocolCapability->StructureVersion.Minor = 0;
        ProtocolCapability->ProtocolVersion.Major = 1;
        ProtocolCapability->ProtocolVersion.Minor = 0;
        DEBUG ((DEBUG_ERROR, "TreeGetCapability (Compatible) - %r\n", EFI_SUCCESS));
        return EFI_SUCCESS;
      }
    }
    ProtocolCapability->Size = mTcgDxeData.BsCap.Size;
    return EFI_BUFFER_TOO_SMALL;
  }

  CopyMem (ProtocolCapability, &mTcgDxeData.BsCap, mTcgDxeData.BsCap.Size);
  DEBUG ((DEBUG_VERBOSE, "Tcg2GetCapability - %r\n", EFI_SUCCESS));
  return EFI_SUCCESS;
}

/**
  This function dump PCR event.

  @param[in]  EventHdr     TCG PCR event structure.
**/
VOID
DumpEvent (
  IN TCG_PCR_EVENT_HDR         *EventHdr
  )
{
  UINTN                     Index;

  DEBUG ((DEBUG_INFO, "  Event:\n"));
  DEBUG ((DEBUG_INFO, "    PCRIndex  - %d\n", EventHdr->PCRIndex));
  DEBUG ((DEBUG_INFO, "    EventType - 0x%08x\n", EventHdr->EventType));
  DEBUG ((DEBUG_INFO, "    Digest    - "));
  for (Index = 0; Index < sizeof(TCG_DIGEST); Index++) {
    DEBUG ((DEBUG_INFO, "%02x ", EventHdr->Digest.digest[Index]));
  }
  DEBUG ((DEBUG_INFO, "\n"));
  DEBUG ((DEBUG_INFO, "    EventSize - 0x%08x\n", EventHdr->EventSize));
  InternalDumpHex ((UINT8 *)(EventHdr + 1), EventHdr->EventSize);
}

/**
  This function dump TCG_EfiSpecIDEventStruct.

  @param[in]  TcgEfiSpecIdEventStruct     A pointer to TCG_EfiSpecIDEventStruct.
**/
VOID
DumpTcgEfiSpecIdEventStruct (
  IN TCG_EfiSpecIDEventStruct   *TcgEfiSpecIdEventStruct
  )
{
  TCG_EfiSpecIdEventAlgorithmSize  *DigestSize;
  UINTN                            Index;
  UINT8                            *VendorInfoSize;
  UINT8                            *VendorInfo;
  UINT32                           NumberOfAlgorithms;

  DEBUG ((DEBUG_INFO, "  TCG_EfiSpecIDEventStruct:\n"));
  DEBUG ((DEBUG_INFO, "    signature          - '"));
  for (Index = 0; Index < sizeof(TcgEfiSpecIdEventStruct->signature); Index++) {
    DEBUG ((DEBUG_INFO, "%c", TcgEfiSpecIdEventStruct->signature[Index]));
  }
  DEBUG ((DEBUG_INFO, "'\n"));
  DEBUG ((DEBUG_INFO, "    platformClass      - 0x%08x\n", TcgEfiSpecIdEventStruct->platformClass));
  DEBUG ((DEBUG_INFO, "    specVersion        - %d.%d%d\n", TcgEfiSpecIdEventStruct->specVersionMajor, TcgEfiSpecIdEventStruct->specVersionMinor, TcgEfiSpecIdEventStruct->specErrata));
  DEBUG ((DEBUG_INFO, "    uintnSize          - 0x%02x\n", TcgEfiSpecIdEventStruct->uintnSize));

  CopyMem (&NumberOfAlgorithms, TcgEfiSpecIdEventStruct + 1, sizeof(NumberOfAlgorithms));
  DEBUG ((DEBUG_INFO, "    NumberOfAlgorithms - 0x%08x\n", NumberOfAlgorithms));

  DigestSize = (TCG_EfiSpecIdEventAlgorithmSize *)((UINT8 *)TcgEfiSpecIdEventStruct + sizeof(*TcgEfiSpecIdEventStruct) + sizeof(NumberOfAlgorithms));
  for (Index = 0; Index < NumberOfAlgorithms; Index++) {
    DEBUG ((DEBUG_INFO, "    digest(%d)\n", Index));
    DEBUG ((DEBUG_INFO, "      algorithmId      - 0x%04x\n", DigestSize[Index].algorithmId));
    DEBUG ((DEBUG_INFO, "      digestSize       - 0x%04x\n", DigestSize[Index].digestSize));
  }
  VendorInfoSize = (UINT8 *)&DigestSize[NumberOfAlgorithms];
  DEBUG ((DEBUG_INFO, "    VendorInfoSize     - 0x%02x\n", *VendorInfoSize));
  VendorInfo = VendorInfoSize + 1;
  DEBUG ((DEBUG_INFO, "    VendorInfo         - "));
  for (Index = 0; Index < *VendorInfoSize; Index++) {
    DEBUG ((DEBUG_INFO, "%02x ", VendorInfo[Index]));
  }
  DEBUG ((DEBUG_INFO, "\n"));
}

/**
  This function get size of TCG_EfiSpecIDEventStruct.

  @param[in]  TcgEfiSpecIdEventStruct     A pointer to TCG_EfiSpecIDEventStruct.
**/
UINTN
GetTcgEfiSpecIdEventStructSize (
  IN TCG_EfiSpecIDEventStruct   *TcgEfiSpecIdEventStruct
  )
{
  TCG_EfiSpecIdEventAlgorithmSize  *DigestSize;
  UINT8                            *VendorInfoSize;
  UINT32                           NumberOfAlgorithms;

  CopyMem (&NumberOfAlgorithms, TcgEfiSpecIdEventStruct + 1, sizeof(NumberOfAlgorithms));

  DigestSize = (TCG_EfiSpecIdEventAlgorithmSize *)((UINT8 *)TcgEfiSpecIdEventStruct + sizeof(*TcgEfiSpecIdEventStruct) + sizeof(NumberOfAlgorithms));
  VendorInfoSize = (UINT8 *)&DigestSize[NumberOfAlgorithms];
  return sizeof(TCG_EfiSpecIDEventStruct) + sizeof(UINT32) + (NumberOfAlgorithms * sizeof(TCG_EfiSpecIdEventAlgorithmSize)) + sizeof(UINT8) + (*VendorInfoSize);
}

/**
  This function dump PCR event 2.

  @param[in]  TcgPcrEvent2     TCG PCR event 2 structure.
**/
VOID
DumpEvent2 (
  IN TCG_PCR_EVENT2        *TcgPcrEvent2
  )
{
  UINTN                     Index;
  UINT32                    DigestIndex;
  UINT32                    DigestCount;
  TPMI_ALG_HASH             HashAlgo;
  UINT32                    DigestSize;
  UINT8                     *DigestBuffer;
  UINT32                    EventSize;
  UINT8                     *EventBuffer;

  DEBUG ((DEBUG_INFO, "  Event:\n"));
  DEBUG ((DEBUG_INFO, "    PCRIndex  - %d\n", TcgPcrEvent2->PCRIndex));
  DEBUG ((DEBUG_INFO, "    EventType - 0x%08x\n", TcgPcrEvent2->EventType));

  DEBUG ((DEBUG_INFO, "    DigestCount: 0x%08x\n", TcgPcrEvent2->Digest.count));

  DigestCount = TcgPcrEvent2->Digest.count;
  HashAlgo = TcgPcrEvent2->Digest.digests[0].hashAlg;
  DigestBuffer = (UINT8 *)&TcgPcrEvent2->Digest.digests[0].digest;
  for (DigestIndex = 0; DigestIndex < DigestCount; DigestIndex++) {
    DEBUG ((DEBUG_INFO, "      HashAlgo : 0x%04x\n", HashAlgo));
    DEBUG ((DEBUG_INFO, "      Digest(%d): ", DigestIndex));
    DigestSize = GetHashSizeFromAlgo (HashAlgo);
    for (Index = 0; Index < DigestSize; Index++) {
      DEBUG ((DEBUG_INFO, "%02x ", DigestBuffer[Index]));
    }
    DEBUG ((DEBUG_INFO, "\n"));
    //
    // Prepare next
    //
    CopyMem (&HashAlgo, DigestBuffer + DigestSize, sizeof(TPMI_ALG_HASH));
    DigestBuffer = DigestBuffer + DigestSize + sizeof(TPMI_ALG_HASH);
  }
  DEBUG ((DEBUG_INFO, "\n"));
  DigestBuffer = DigestBuffer - sizeof(TPMI_ALG_HASH);

  CopyMem (&EventSize, DigestBuffer, sizeof(TcgPcrEvent2->EventSize));
  DEBUG ((DEBUG_INFO, "    EventSize - 0x%08x\n", EventSize));
  EventBuffer = DigestBuffer + sizeof(TcgPcrEvent2->EventSize);
  InternalDumpHex (EventBuffer, EventSize);
}

/**
  This function returns size of TCG PCR event 2.

  @param[in]  TcgPcrEvent2     TCG PCR event 2 structure.

  @return size of TCG PCR event 2.
**/
UINTN
GetPcrEvent2Size (
  IN TCG_PCR_EVENT2        *TcgPcrEvent2
  )
{
  UINT32                    DigestIndex;
  UINT32                    DigestCount;
  TPMI_ALG_HASH             HashAlgo;
  UINT32                    DigestSize;
  UINT8                     *DigestBuffer;
  UINT32                    EventSize;
  UINT8                     *EventBuffer;

  DigestCount = TcgPcrEvent2->Digest.count;
  HashAlgo = TcgPcrEvent2->Digest.digests[0].hashAlg;
  DigestBuffer = (UINT8 *)&TcgPcrEvent2->Digest.digests[0].digest;
  for (DigestIndex = 0; DigestIndex < DigestCount; DigestIndex++) {
    DigestSize = GetHashSizeFromAlgo (HashAlgo);
    //
    // Prepare next
    //
    CopyMem (&HashAlgo, DigestBuffer + DigestSize, sizeof(TPMI_ALG_HASH));
    DigestBuffer = DigestBuffer + DigestSize + sizeof(TPMI_ALG_HASH);
  }
  DigestBuffer = DigestBuffer - sizeof(TPMI_ALG_HASH);

  CopyMem (&EventSize, DigestBuffer, sizeof(TcgPcrEvent2->EventSize));
  EventBuffer = DigestBuffer + sizeof(TcgPcrEvent2->EventSize);

  return (UINTN)EventBuffer + EventSize - (UINTN)TcgPcrEvent2;
}

/**
  This function dump event log.

  @param[in]  EventLogFormat     The type of the event log for which the information is requested.
  @param[in]  EventLogLocation   A pointer to the memory address of the event log.
  @param[in]  EventLogLastEntry  If the Event Log contains more than one entry, this is a pointer to the
                                 address of the start of the last entry in the event log in memory.
  @param[in]  FinalEventsTable   A pointer to the memory address of the final event table.
**/
VOID
DumpEventLog (
  IN EFI_TCG2_EVENT_LOG_FORMAT   EventLogFormat,
  IN EFI_PHYSICAL_ADDRESS        EventLogLocation,
  IN EFI_PHYSICAL_ADDRESS        EventLogLastEntry,
  IN EFI_TCG2_FINAL_EVENTS_TABLE *FinalEventsTable
  )
{
  TCG_PCR_EVENT_HDR         *EventHdr;
  TCG_PCR_EVENT2            *TcgPcrEvent2;
  TCG_EfiSpecIDEventStruct  *TcgEfiSpecIdEventStruct;
  UINTN                     NumberOfEvents;

  DEBUG ((DEBUG_INFO, "EventLogFormat: (0x%x)\n", EventLogFormat));

  switch (EventLogFormat) {
  case EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2:
    EventHdr = (TCG_PCR_EVENT_HDR *)(UINTN)EventLogLocation;
    while ((UINTN)EventHdr <= EventLogLastEntry) {
      DumpEvent (EventHdr);
      EventHdr = (TCG_PCR_EVENT_HDR *)((UINTN)EventHdr + sizeof(TCG_PCR_EVENT_HDR) + EventHdr->EventSize);
    }
    if (FinalEventsTable == NULL) {
      DEBUG ((DEBUG_INFO, "FinalEventsTable: NOT FOUND\n"));
    } else {
      DEBUG ((DEBUG_INFO, "FinalEventsTable:    (0x%x)\n", FinalEventsTable));
      DEBUG ((DEBUG_INFO, "  Version:           (0x%x)\n", FinalEventsTable->Version));
      DEBUG ((DEBUG_INFO, "  NumberOfEvents:    (0x%x)\n", FinalEventsTable->NumberOfEvents));

      EventHdr = (TCG_PCR_EVENT_HDR *)(UINTN)(FinalEventsTable + 1);
      for (NumberOfEvents = 0; NumberOfEvents < FinalEventsTable->NumberOfEvents; NumberOfEvents++) {
        DumpEvent (EventHdr);
        EventHdr = (TCG_PCR_EVENT_HDR *)((UINTN)EventHdr + sizeof(TCG_PCR_EVENT_HDR) + EventHdr->EventSize);
      }
    }
    break;
  case EFI_TCG2_EVENT_LOG_FORMAT_TCG_2:
    //
    // Dump first event
    //
    EventHdr = (TCG_PCR_EVENT_HDR *)(UINTN)EventLogLocation;
    DumpEvent (EventHdr);

    TcgEfiSpecIdEventStruct = (TCG_EfiSpecIDEventStruct *)(EventHdr + 1);
    DumpTcgEfiSpecIdEventStruct (TcgEfiSpecIdEventStruct);

    TcgPcrEvent2 = (TCG_PCR_EVENT2 *)((UINTN)TcgEfiSpecIdEventStruct + GetTcgEfiSpecIdEventStructSize (TcgEfiSpecIdEventStruct));
    while ((UINTN)TcgPcrEvent2 <= EventLogLastEntry) {
      DumpEvent2 (TcgPcrEvent2);
      TcgPcrEvent2 = (TCG_PCR_EVENT2 *)((UINTN)TcgPcrEvent2 + GetPcrEvent2Size (TcgPcrEvent2));
    }

    if (FinalEventsTable == NULL) {
      DEBUG ((DEBUG_INFO, "FinalEventsTable: NOT FOUND\n"));
    } else {
      DEBUG ((DEBUG_INFO, "FinalEventsTable:    (0x%x)\n", FinalEventsTable));
      DEBUG ((DEBUG_INFO, "  Version:           (0x%x)\n", FinalEventsTable->Version));
      DEBUG ((DEBUG_INFO, "  NumberOfEvents:    (0x%x)\n", FinalEventsTable->NumberOfEvents));

      TcgPcrEvent2 = (TCG_PCR_EVENT2 *)(UINTN)(FinalEventsTable + 1);
      for (NumberOfEvents = 0; NumberOfEvents < FinalEventsTable->NumberOfEvents; NumberOfEvents++) {
        DumpEvent2 (TcgPcrEvent2);
        TcgPcrEvent2 = (TCG_PCR_EVENT2 *)((UINTN)TcgPcrEvent2 + GetPcrEvent2Size (TcgPcrEvent2));
      }
    }
    break;
  }

  return ;
}

/**
  The EFI_TCG2_PROTOCOL Get Event Log function call allows a caller to
  retrieve the address of a given event log and its last entry.

  @param[in]  This               Indicates the calling context
  @param[in]  EventLogFormat     The type of the event log for which the information is requested.
  @param[out] EventLogLocation   A pointer to the memory address of the event log.
  @param[out] EventLogLastEntry  If the Event Log contains more than one entry, this is a pointer to the
                                 address of the start of the last entry in the event log in memory.
  @param[out] EventLogTruncated  If the Event Log is missing at least one entry because an event would
                                 have exceeded the area allocated for events, this value is set to TRUE.
                                 Otherwise, the value will be FALSE and the Event Log will be complete.

  @retval EFI_SUCCESS            Operation completed successfully.
  @retval EFI_INVALID_PARAMETER  One or more of the parameters are incorrect
                                 (e.g. asking for an event log whose format is not supported).
**/
EFI_STATUS
EFIAPI
Tcg2GetEventLog (
  IN EFI_TCG2_PROTOCOL         *This,
  IN EFI_TCG2_EVENT_LOG_FORMAT EventLogFormat,
  OUT EFI_PHYSICAL_ADDRESS     *EventLogLocation,
  OUT EFI_PHYSICAL_ADDRESS     *EventLogLastEntry,
  OUT BOOLEAN                  *EventLogTruncated
  )
{
  UINTN  Index;

  DEBUG ((DEBUG_INFO, "Tcg2GetEventLog ... (0x%x)\n", EventLogFormat));

  if (This == NULL) {
    return EFI_INVALID_PARAMETER;
  }

  for (Index = 0; Index < sizeof(mTcg2EventInfo)/sizeof(mTcg2EventInfo[0]); Index++) {
    if (EventLogFormat == mTcg2EventInfo[Index].LogFormat) {
      break;
    }
  }

  if (Index == sizeof(mTcg2EventInfo)/sizeof(mTcg2EventInfo[0])) {
    return EFI_INVALID_PARAMETER;
  }

  if ((mTcg2EventInfo[Index].LogFormat & mTcgDxeData.BsCap.SupportedEventLogs) == 0) {
    return EFI_INVALID_PARAMETER;
  }

  if (!mTcgDxeData.BsCap.TPMPresentFlag) {
    if (EventLogLocation != NULL) {
      *EventLogLocation = 0;
    }
    if (EventLogLastEntry != NULL) {
      *EventLogLastEntry = 0;
    }
    if (EventLogTruncated != NULL) {
      *EventLogTruncated = FALSE;
    }
    return EFI_SUCCESS;
  }

  if (EventLogLocation != NULL) {
    *EventLogLocation = mTcgDxeData.EventLogAreaStruct[Index].Lasa;
    DEBUG ((DEBUG_INFO, "Tcg2GetEventLog (EventLogLocation - %x)\n", *EventLogLocation));
  }

  if (EventLogLastEntry != NULL) {
    if (!mTcgDxeData.EventLogAreaStruct[Index].EventLogStarted) {
      *EventLogLastEntry = (EFI_PHYSICAL_ADDRESS)(UINTN)0;
    } else {
      *EventLogLastEntry = (EFI_PHYSICAL_ADDRESS)(UINTN)mTcgDxeData.EventLogAreaStruct[Index].LastEvent;
    }
    DEBUG ((DEBUG_INFO, "Tcg2GetEventLog (EventLogLastEntry - %x)\n", *EventLogLastEntry));
  }

  if (EventLogTruncated != NULL) {
    *EventLogTruncated = mTcgDxeData.EventLogAreaStruct[Index].EventLogTruncated;
    DEBUG ((DEBUG_INFO, "Tcg2GetEventLog (EventLogTruncated - %x)\n", *EventLogTruncated));
  }

  DEBUG ((DEBUG_INFO, "Tcg2GetEventLog - %r\n", EFI_SUCCESS));

  // Dump Event Log for debug purpose
  if ((EventLogLocation != NULL) && (EventLogLastEntry != NULL)) {
    DumpEventLog (EventLogFormat, *EventLogLocation, *EventLogLastEntry, mTcgDxeData.FinalEventsTable[Index]);
  }

  //
  // All events generated after the invocation of EFI_TCG2_GET_EVENT_LOG SHALL be stored
  // in an instance of an EFI_CONFIGURATION_TABLE named by the VendorGuid of EFI_TCG2_FINAL_EVENTS_TABLE_GUID.
  //
  mTcgDxeData.GetEventLogCalled[Index] = TRUE;

  return EFI_SUCCESS;
}

/**
  Return if this is a Tcg800155PlatformIdEvent.

  @param[in]      NewEventHdr         Pointer to a TCG_PCR_EVENT_HDR/TCG_PCR_EVENT_EX data structure.
  @param[in]      NewEventHdrSize     New event header size.
  @param[in]      NewEventData        Pointer to the new event data.
  @param[in]      NewEventSize        New event data size.

  @retval TRUE   This is a Tcg800155PlatformIdEvent.
  @retval FALSE  This is NOT a Tcg800155PlatformIdEvent.

**/
BOOLEAN
Is800155Event (
  IN      VOID                      *NewEventHdr,
  IN      UINT32                    NewEventHdrSize,
  IN      UINT8                     *NewEventData,
  IN      UINT32                    NewEventSize
  )
{
  if ((((TCG_PCR_EVENT2_HDR *)NewEventHdr)->EventType == EV_NO_ACTION) &&
      (NewEventSize >= sizeof(TCG_Sp800_155_PlatformId_Event2)) &&
      (CompareMem (NewEventData, TCG_Sp800_155_PlatformId_Event2_SIGNATURE,
        sizeof(TCG_Sp800_155_PlatformId_Event2_SIGNATURE) - 1) == 0)) {
    return TRUE;
  }
  return FALSE;
}

/**
  Add a new entry to the Event Log.

  @param[in, out] EventLogAreaStruct  The event log area data structure
  @param[in]      NewEventHdr         Pointer to a TCG_PCR_EVENT_HDR/TCG_PCR_EVENT_EX data structure.
  @param[in]      NewEventHdrSize     New event header size.
  @param[in]      NewEventData        Pointer to the new event data.
  @param[in]      NewEventSize        New event data size.

  @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
TcgCommLogEvent (
  IN OUT  TCG_EVENT_LOG_AREA_STRUCT *EventLogAreaStruct,
  IN      VOID                      *NewEventHdr,
  IN      UINT32                    NewEventHdrSize,
  IN      UINT8                     *NewEventData,
  IN      UINT32                    NewEventSize
  )
{
  UINTN                            NewLogSize;
  BOOLEAN                          Record800155Event;

  if (NewEventSize > MAX_ADDRESS -  NewEventHdrSize) {
    return EFI_OUT_OF_RESOURCES;
  }

  NewLogSize = NewEventHdrSize + NewEventSize;

  if (NewLogSize > MAX_ADDRESS -  EventLogAreaStruct->EventLogSize) {
    return EFI_OUT_OF_RESOURCES;
  }

  if (NewLogSize + EventLogAreaStruct->EventLogSize > EventLogAreaStruct->Laml) {
    DEBUG ((DEBUG_INFO, "  Laml       - 0x%x\n", EventLogAreaStruct->Laml));
    DEBUG ((DEBUG_INFO, "  NewLogSize - 0x%x\n", NewLogSize));
    DEBUG ((DEBUG_INFO, "  LogSize    - 0x%x\n", EventLogAreaStruct->EventLogSize));
    DEBUG ((DEBUG_INFO, "TcgCommLogEvent - %r\n", EFI_OUT_OF_RESOURCES));
    return EFI_OUT_OF_RESOURCES;
  }

  //
  // Check 800-155 event
  // Record to 800-155 event offset only.
  // If the offset is 0, no need to record.
  //
  Record800155Event = Is800155Event (NewEventHdr, NewEventHdrSize, NewEventData, NewEventSize);
  if (Record800155Event) {
    if (EventLogAreaStruct->Next800155EventOffset != 0) {
      CopyMem (
        (UINT8 *)(UINTN)EventLogAreaStruct->Lasa + EventLogAreaStruct->Next800155EventOffset + NewLogSize,
        (UINT8 *)(UINTN)EventLogAreaStruct->Lasa + EventLogAreaStruct->Next800155EventOffset,
        EventLogAreaStruct->EventLogSize - EventLogAreaStruct->Next800155EventOffset
        );

      CopyMem (
        (UINT8 *)(UINTN)EventLogAreaStruct->Lasa + EventLogAreaStruct->Next800155EventOffset,
        NewEventHdr,
        NewEventHdrSize
        );
      CopyMem (
        (UINT8 *)(UINTN)EventLogAreaStruct->Lasa + EventLogAreaStruct->Next800155EventOffset + NewEventHdrSize,
        NewEventData,
        NewEventSize
        );

      EventLogAreaStruct->Next800155EventOffset += NewLogSize;
      EventLogAreaStruct->LastEvent += NewLogSize;
      EventLogAreaStruct->EventLogSize += NewLogSize;
    }
    return EFI_SUCCESS;
  }

  EventLogAreaStruct->LastEvent = (UINT8 *)(UINTN)EventLogAreaStruct->Lasa + EventLogAreaStruct->EventLogSize;
  EventLogAreaStruct->EventLogSize += NewLogSize;
  CopyMem (EventLogAreaStruct->LastEvent, NewEventHdr, NewEventHdrSize);
  CopyMem (
    EventLogAreaStruct->LastEvent + NewEventHdrSize,
    NewEventData,
    NewEventSize
    );
  return EFI_SUCCESS;
}

/**
  Add a new entry to the Event Log.

  @param[in] EventLogFormat  The type of the event log for which the information is requested.
  @param[in] NewEventHdr     Pointer to a TCG_PCR_EVENT_HDR/TCG_PCR_EVENT_EX data structure.
  @param[in] NewEventHdrSize New event header size.
  @param[in] NewEventData    Pointer to the new event data.
  @param[in] NewEventSize    New event data size.

  @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
TcgDxeLogEvent (
  IN      EFI_TCG2_EVENT_LOG_FORMAT EventLogFormat,
  IN      VOID                      *NewEventHdr,
  IN      UINT32                    NewEventHdrSize,
  IN      UINT8                     *NewEventData,
  IN      UINT32                    NewEventSize
  )
{
  EFI_STATUS                Status;
  UINTN                     Index;
  TCG_EVENT_LOG_AREA_STRUCT *EventLogAreaStruct;

  for (Index = 0; Index < sizeof(mTcg2EventInfo)/sizeof(mTcg2EventInfo[0]); Index++) {
    if (EventLogFormat == mTcg2EventInfo[Index].LogFormat) {
      break;
    }
  }

  if (Index == sizeof(mTcg2EventInfo)/sizeof(mTcg2EventInfo[0])) {
    return EFI_INVALID_PARAMETER;
  }

  //
  // Record to normal event log
  //
  EventLogAreaStruct = &mTcgDxeData.EventLogAreaStruct[Index];

  if (EventLogAreaStruct->EventLogTruncated) {
    return EFI_VOLUME_FULL;
  }

  Status = TcgCommLogEvent (
             EventLogAreaStruct,
             NewEventHdr,
             NewEventHdrSize,
             NewEventData,
             NewEventSize
             );

  if (Status == EFI_OUT_OF_RESOURCES) {
    EventLogAreaStruct->EventLogTruncated = TRUE;
    return EFI_VOLUME_FULL;
  } else if (Status == EFI_SUCCESS) {
    EventLogAreaStruct->EventLogStarted = TRUE;
  }

  //
  // If GetEventLog is called, record to FinalEventsTable, too.
  //
  if (mTcgDxeData.GetEventLogCalled[Index]) {
    if (mTcgDxeData.FinalEventsTable[Index] == NULL) {
      //
      // no need for FinalEventsTable
      //
      return EFI_SUCCESS;
    }
    EventLogAreaStruct = &mTcgDxeData.FinalEventLogAreaStruct[Index];

    if (EventLogAreaStruct->EventLogTruncated) {
      return EFI_VOLUME_FULL;
    }

    Status = TcgCommLogEvent (
               EventLogAreaStruct,
               NewEventHdr,
               NewEventHdrSize,
               NewEventData,
               NewEventSize
               );
    if (Status == EFI_OUT_OF_RESOURCES) {
      EventLogAreaStruct->EventLogTruncated = TRUE;
      return EFI_VOLUME_FULL;
    } else if (Status == EFI_SUCCESS) {
      EventLogAreaStruct->EventLogStarted = TRUE;
      //
      // Increase the NumberOfEvents in FinalEventsTable
      //
      (mTcgDxeData.FinalEventsTable[Index])->NumberOfEvents ++;
      DEBUG ((DEBUG_INFO, "FinalEventsTable->NumberOfEvents - 0x%x\n", (mTcgDxeData.FinalEventsTable[Index])->NumberOfEvents));
      DEBUG ((DEBUG_INFO, "  Size - 0x%x\n", (UINTN)EventLogAreaStruct->EventLogSize));
    }
  }

  return Status;
}

/**
  Get TPML_DIGEST_VALUES compact binary buffer size.

  @param[in]     DigestListBin    TPML_DIGEST_VALUES compact binary buffer.

  @return TPML_DIGEST_VALUES compact binary buffer size.
**/
UINT32
GetDigestListBinSize (
  IN VOID   *DigestListBin
  )
{
  UINTN         Index;
  UINT16        DigestSize;
  UINT32        TotalSize;
  UINT32        Count;
  TPMI_ALG_HASH HashAlg;

  Count = ReadUnaligned32 (DigestListBin);
  TotalSize = sizeof(Count);
  DigestListBin = (UINT8 *)DigestListBin + sizeof(Count);
  for (Index = 0; Index < Count; Index++) {
    HashAlg = ReadUnaligned16 (DigestListBin);
    TotalSize += sizeof(HashAlg);
    DigestListBin = (UINT8 *)DigestListBin + sizeof(HashAlg);

    DigestSize = GetHashSizeFromAlgo (HashAlg);
    TotalSize += DigestSize;
    DigestListBin = (UINT8 *)DigestListBin + DigestSize;
  }

  return TotalSize;
}

/**
  Copy TPML_DIGEST_VALUES compact binary into a buffer

  @param[in,out]    Buffer                  Buffer to hold copied TPML_DIGEST_VALUES compact binary.
  @param[in]        DigestListBin           TPML_DIGEST_VALUES compact binary buffer.
  @param[in]        HashAlgorithmMask       HASH bits corresponding to the desired digests to copy.
  @param[out]       HashAlgorithmMaskCopied Pointer to HASH bits corresponding to the digests copied.

  @return The end of buffer to hold TPML_DIGEST_VALUES compact binary.
**/
VOID *
CopyDigestListBinToBuffer (
  IN OUT VOID                       *Buffer,
  IN VOID                           *DigestListBin,
  IN UINT32                         HashAlgorithmMask,
  OUT UINT32                        *HashAlgorithmMaskCopied
  )
{
  UINTN         Index;
  UINT16        DigestSize;
  UINT32        Count;
  TPMI_ALG_HASH HashAlg;
  UINT32        DigestListCount;
  UINT32        *DigestListCountPtr;

  DigestListCountPtr = (UINT32 *) Buffer;
  DigestListCount = 0;
  (*HashAlgorithmMaskCopied) = 0;

  Count = ReadUnaligned32 (DigestListBin);
  Buffer = (UINT8 *)Buffer + sizeof(Count);
  DigestListBin = (UINT8 *)DigestListBin + sizeof(Count);
  for (Index = 0; Index < Count; Index++) {
    HashAlg = ReadUnaligned16 (DigestListBin);
    DigestListBin = (UINT8 *)DigestListBin + sizeof(HashAlg);
    DigestSize = GetHashSizeFromAlgo (HashAlg);

    if (IsHashAlgSupportedInHashAlgorithmMask(HashAlg, HashAlgorithmMask)) {
      CopyMem (Buffer, &HashAlg, sizeof(HashAlg));
      Buffer = (UINT8 *)Buffer + sizeof(HashAlg);
      CopyMem (Buffer, DigestListBin, DigestSize);
      Buffer = (UINT8 *)Buffer + DigestSize;
      DigestListCount++;
      (*HashAlgorithmMaskCopied) |= GetHashMaskFromAlgo (HashAlg);
    } else {
      DEBUG ((DEBUG_ERROR, "WARNING: CopyDigestListBinToBuffer Event log has HashAlg unsupported by PCR bank (0x%x)\n", HashAlg));
    }
    DigestListBin = (UINT8 *)DigestListBin + DigestSize;
  }
  WriteUnaligned32 (DigestListCountPtr, DigestListCount);

  return Buffer;
}

/**
  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
TcgDxeLogHashEvent (
  IN TPML_DIGEST_VALUES             *DigestList,
  IN OUT  TCG_PCR_EVENT_HDR         *NewEventHdr,
  IN      UINT8                     *NewEventData
  )
{
  EFI_STATUS                        Status;
  EFI_TPL                           OldTpl;
  UINTN                             Index;
  EFI_STATUS                        RetStatus;
  TCG_PCR_EVENT2                    TcgPcrEvent2;
  UINT8                             *DigestBuffer;
  UINT32                            *EventSizePtr;

  DEBUG ((DEBUG_INFO, "SupportedEventLogs - 0x%08x\n", mTcgDxeData.BsCap.SupportedEventLogs));

  RetStatus = EFI_SUCCESS;
  for (Index = 0; Index < sizeof(mTcg2EventInfo)/sizeof(mTcg2EventInfo[0]); Index++) {
    if ((mTcgDxeData.BsCap.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)) {
          //
          // Enter critical region
          //
          OldTpl = gBS->RaiseTPL (TPL_HIGH_LEVEL);
          Status = TcgDxeLogEvent (
                     mTcg2EventInfo[Index].LogFormat,
                     NewEventHdr,
                     sizeof(TCG_PCR_EVENT_HDR),
                     NewEventData,
                     NewEventHdr->EventSize
                     );
          if (Status != EFI_SUCCESS) {
            RetStatus = Status;
          }
          gBS->RestoreTPL (OldTpl);
          //
          // Exit critical region
          //
        }
        break;
      case EFI_TCG2_EVENT_LOG_FORMAT_TCG_2:
        ZeroMem (&TcgPcrEvent2, sizeof(TcgPcrEvent2));
        TcgPcrEvent2.PCRIndex = NewEventHdr->PCRIndex;
        TcgPcrEvent2.EventType = NewEventHdr->EventType;
        DigestBuffer = (UINT8 *)&TcgPcrEvent2.Digest;
        EventSizePtr = CopyDigestListToBuffer (DigestBuffer, DigestList, mTcgDxeData.BsCap.ActivePcrBanks);
        CopyMem (EventSizePtr, &NewEventHdr->EventSize, sizeof(NewEventHdr->EventSize));

        //
        // Enter critical region
        //
        OldTpl = gBS->RaiseTPL (TPL_HIGH_LEVEL);
        Status = TcgDxeLogEvent (
                   mTcg2EventInfo[Index].LogFormat,
                   &TcgPcrEvent2,
                   sizeof(TcgPcrEvent2.PCRIndex) + sizeof(TcgPcrEvent2.EventType) + GetDigestListBinSize (DigestBuffer) + sizeof(TcgPcrEvent2.EventSize),
                   NewEventData,
                   NewEventHdr->EventSize
                   );
        if (Status != EFI_SUCCESS) {
          RetStatus = Status;
        }
        gBS->RestoreTPL (OldTpl);
        //
        // Exit critical region
        //
        break;
      }
    }
  }

  return RetStatus;
}

/**
  Do a hash operation on a data buffer, extend a specific TPM PCR with the hash result,
  and add an entry to the Event Log.

  @param[in]      Flags         Bitmap providing additional information.
  @param[in]      HashData      Physical address of the start of the data buffer
                                to be hashed, extended, and logged.
  @param[in]      HashDataLen   The length, in bytes, of the buffer referenced by HashData
  @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           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
TcgDxeHashLogExtendEvent (
  IN      UINT64                    Flags,
  IN      UINT8                     *HashData,
  IN      UINT64                    HashDataLen,
  IN OUT  TCG_PCR_EVENT_HDR         *NewEventHdr,
  IN      UINT8                     *NewEventData
  )
{
  EFI_STATUS                        Status;
  TPML_DIGEST_VALUES                DigestList;
  TCG_PCR_EVENT2_HDR                NoActionEvent;

  if (!mTcgDxeData.BsCap.TPMPresentFlag) {
    return EFI_DEVICE_ERROR;
  }

  if (NewEventHdr->EventType == EV_NO_ACTION) {
    //
    // Do not do TPM extend for EV_NO_ACTION
    //
    Status = EFI_SUCCESS;
    InitNoActionEvent (&NoActionEvent, NewEventHdr->EventSize);
    if ((Flags & EFI_TCG2_EXTEND_ONLY) == 0) {
      Status = TcgDxeLogHashEvent (&(NoActionEvent.Digests), NewEventHdr, NewEventData);
    }

    return Status;
  }

  Status = HashAndExtend (
             NewEventHdr->PCRIndex,
             HashData,
             (UINTN)HashDataLen,
             &DigestList
             );
  if (!EFI_ERROR (Status)) {
    if ((Flags & EFI_TCG2_EXTEND_ONLY) == 0) {
      Status = TcgDxeLogHashEvent (&DigestList, NewEventHdr, NewEventData);
    }
  }

  if (Status == EFI_DEVICE_ERROR) {
    DEBUG ((DEBUG_ERROR, "TcgDxeHashLogExtendEvent - %r. Disable TPM.\n", Status));
    mTcgDxeData.BsCap.TPMPresentFlag = FALSE;
    REPORT_STATUS_CODE (
      EFI_ERROR_CODE | EFI_ERROR_MINOR,
      (PcdGet32 (PcdStatusCodeSubClassTpmDevice) | EFI_P_EC_INTERFACE_ERROR)
      );
  }

  return Status;
}

/**
  The EFI_TCG2_PROTOCOL HashLogExtendEvent function call provides callers with
  an opportunity to extend and optionally log events without requiring
  knowledge of actual TPM commands.
  The extend operation will occur even if this function cannot create an event
  log entry (e.g. due to the event log being full).

  @param[in]  This               Indicates the calling context
  @param[in]  Flags              Bitmap providing additional information.
  @param[in]  DataToHash         Physical address of the start of the data buffer to be hashed.
  @param[in]  DataToHashLen      The length in bytes of the buffer referenced by DataToHash.
  @param[in]  Event              Pointer to data buffer containing information about the event.

  @retval EFI_SUCCESS            Operation completed successfully.
  @retval EFI_DEVICE_ERROR       The command was unsuccessful.
  @retval EFI_VOLUME_FULL        The extend operation occurred, but the event could not be written to one or more event logs.
  @retval EFI_INVALID_PARAMETER  One or more of the parameters are incorrect.
  @retval EFI_UNSUPPORTED        The PE/COFF image type is not supported.
**/
EFI_STATUS
EFIAPI
Tcg2HashLogExtendEvent (
  IN EFI_TCG2_PROTOCOL    *This,
  IN UINT64               Flags,
  IN EFI_PHYSICAL_ADDRESS DataToHash,
  IN UINT64               DataToHashLen,
  IN EFI_TCG2_EVENT       *Event
  )
{
  EFI_STATUS         Status;
  TCG_PCR_EVENT_HDR  NewEventHdr;
  TPML_DIGEST_VALUES DigestList;

  DEBUG ((DEBUG_VERBOSE, "Tcg2HashLogExtendEvent ...\n"));

  if ((This == NULL) || (Event == NULL)) {
    return EFI_INVALID_PARAMETER;
  }
  //
  // Do not check hash data size for EV_NO_ACTION event.
  //
  if ((Event->Header.EventType != EV_NO_ACTION) && (DataToHash == 0)) {
    return EFI_INVALID_PARAMETER;
  }

  if (!mTcgDxeData.BsCap.TPMPresentFlag) {
    return EFI_DEVICE_ERROR;
  }

  if (Event->Size < Event->Header.HeaderSize + sizeof(UINT32)) {
    return EFI_INVALID_PARAMETER;
  }

  if (Event->Header.PCRIndex > MAX_PCR_INDEX) {
    return EFI_INVALID_PARAMETER;
  }

  NewEventHdr.PCRIndex  = Event->Header.PCRIndex;
  NewEventHdr.EventType = Event->Header.EventType;
  NewEventHdr.EventSize = Event->Size - sizeof(UINT32) - Event->Header.HeaderSize;
  if ((Flags & PE_COFF_IMAGE) != 0) {
    Status = MeasurePeImageAndExtend (
               NewEventHdr.PCRIndex,
               DataToHash,
               (UINTN)DataToHashLen,
               &DigestList
               );
    if (!EFI_ERROR (Status)) {
      if ((Flags & EFI_TCG2_EXTEND_ONLY) == 0) {
        Status = TcgDxeLogHashEvent (&DigestList, &NewEventHdr, Event->Event);
      }
    }
    if (Status == EFI_DEVICE_ERROR) {
      DEBUG ((DEBUG_ERROR, "MeasurePeImageAndExtend - %r. Disable TPM.\n", Status));
      mTcgDxeData.BsCap.TPMPresentFlag = FALSE;
      REPORT_STATUS_CODE (
        EFI_ERROR_CODE | EFI_ERROR_MINOR,
        (PcdGet32 (PcdStatusCodeSubClassTpmDevice) | EFI_P_EC_INTERFACE_ERROR)
        );
    }
  } else {
    Status = TcgDxeHashLogExtendEvent (
               Flags,
               (UINT8 *) (UINTN) DataToHash,
               DataToHashLen,
               &NewEventHdr,
               Event->Event
               );
  }
  DEBUG ((DEBUG_VERBOSE, "Tcg2HashLogExtendEvent - %r\n", Status));
  return Status;
}

/**
  This service enables the sending of commands to the TPM.

  @param[in]  This                     Indicates the calling context
  @param[in]  InputParameterBlockSize  Size of the TPM input parameter block.
  @param[in]  InputParameterBlock      Pointer to the TPM input parameter block.
  @param[in]  OutputParameterBlockSize Size of the TPM output parameter block.
  @param[in]  OutputParameterBlock     Pointer to the TPM output parameter block.

  @retval EFI_SUCCESS            The command byte stream was successfully sent to the device and a response was successfully received.
  @retval EFI_DEVICE_ERROR       The command was not successfully sent to the device or a response was not successfully received from the device.
  @retval EFI_INVALID_PARAMETER  One or more of the parameters are incorrect.
  @retval EFI_BUFFER_TOO_SMALL   The output parameter block is too small.
**/
EFI_STATUS
EFIAPI
Tcg2SubmitCommand (
  IN EFI_TCG2_PROTOCOL *This,
  IN UINT32            InputParameterBlockSize,
  IN UINT8             *InputParameterBlock,
  IN UINT32            OutputParameterBlockSize,
  IN UINT8             *OutputParameterBlock
  )
{
  EFI_STATUS    Status;

  DEBUG ((DEBUG_INFO, "Tcg2SubmitCommand ...\n"));

  if ((This == NULL) ||
      (InputParameterBlockSize == 0) || (InputParameterBlock == NULL) ||
      (OutputParameterBlockSize == 0) || (OutputParameterBlock == NULL)) {
    return EFI_INVALID_PARAMETER;
  }

  if (!mTcgDxeData.BsCap.TPMPresentFlag) {
    return EFI_DEVICE_ERROR;
  }

  if (InputParameterBlockSize > mTcgDxeData.BsCap.MaxCommandSize) {
    return EFI_INVALID_PARAMETER;
  }
  if (OutputParameterBlockSize > mTcgDxeData.BsCap.MaxResponseSize) {
    return EFI_INVALID_PARAMETER;
  }

  Status = Tpm2SubmitCommand (
             InputParameterBlockSize,
             InputParameterBlock,
             &OutputParameterBlockSize,
             OutputParameterBlock
             );
  DEBUG ((DEBUG_INFO, "Tcg2SubmitCommand - %r\n", Status));
  return Status;
}

/**
  This service returns the currently active PCR banks.

  @param[in]  This            Indicates the calling context
  @param[out] ActivePcrBanks  Pointer to the variable receiving the bitmap of currently active PCR banks.

  @retval EFI_SUCCESS           The bitmap of active PCR banks was stored in the ActivePcrBanks parameter.
  @retval EFI_INVALID_PARAMETER One or more of the parameters are incorrect.
**/
EFI_STATUS
EFIAPI
Tcg2GetActivePCRBanks (
  IN  EFI_TCG2_PROTOCOL *This,
  OUT UINT32            *ActivePcrBanks
  )
{
  if (ActivePcrBanks == NULL) {
    return EFI_INVALID_PARAMETER;
  }
  *ActivePcrBanks = mTcgDxeData.BsCap.ActivePcrBanks;
  return EFI_SUCCESS;
}

/**
  This service sets the currently active PCR banks.

  @param[in]  This            Indicates the calling context
  @param[in]  ActivePcrBanks  Bitmap of the requested active PCR banks. At least one bit SHALL be set.

  @retval EFI_SUCCESS           The bitmap in ActivePcrBank parameter is already active.
  @retval EFI_INVALID_PARAMETER One or more of the parameters are incorrect.
**/
EFI_STATUS
EFIAPI
Tcg2SetActivePCRBanks (
  IN EFI_TCG2_PROTOCOL *This,
  IN UINT32            ActivePcrBanks
  )
{
  EFI_STATUS  Status;
  UINT32      ReturnCode;

  DEBUG ((DEBUG_INFO, "Tcg2SetActivePCRBanks ... (0x%x)\n", ActivePcrBanks));

  if (ActivePcrBanks == 0) {
    return EFI_INVALID_PARAMETER;
  }
  if ((ActivePcrBanks & (~mTcgDxeData.BsCap.HashAlgorithmBitmap)) != 0) {
    return EFI_INVALID_PARAMETER;
  }
  if (ActivePcrBanks == mTcgDxeData.BsCap.ActivePcrBanks) {
    //
    // Need clear previous SET_PCR_BANKS setting
    //
    ReturnCode = Tcg2PhysicalPresenceLibSubmitRequestToPreOSFunction (TCG2_PHYSICAL_PRESENCE_NO_ACTION, 0);
  } else {
    ReturnCode = Tcg2PhysicalPresenceLibSubmitRequestToPreOSFunction (TCG2_PHYSICAL_PRESENCE_SET_PCR_BANKS, ActivePcrBanks);
  }

  if (ReturnCode == TCG_PP_SUBMIT_REQUEST_TO_PREOS_SUCCESS) {
    Status = EFI_SUCCESS;
  } else if (ReturnCode == TCG_PP_SUBMIT_REQUEST_TO_PREOS_GENERAL_FAILURE) {
    Status = EFI_OUT_OF_RESOURCES;
  } else if (ReturnCode == TCG_PP_SUBMIT_REQUEST_TO_PREOS_NOT_IMPLEMENTED) {
    Status = EFI_UNSUPPORTED;
  } else {
    Status = EFI_DEVICE_ERROR;
  }

  DEBUG ((DEBUG_INFO, "Tcg2SetActivePCRBanks - %r\n", Status));

  return Status;
}

/**
  This service retrieves the result of a previous invocation of SetActivePcrBanks.

  @param[in]  This              Indicates the calling context
  @param[out] OperationPresent  Non-zero value to indicate a SetActivePcrBank operation was invoked during the last boot.
  @param[out] Response          The response from the SetActivePcrBank request.

  @retval EFI_SUCCESS           The result value could be returned.
  @retval EFI_INVALID_PARAMETER One or more of the parameters are incorrect.
**/
EFI_STATUS
EFIAPI
Tcg2GetResultOfSetActivePcrBanks (
  IN  EFI_TCG2_PROTOCOL  *This,
  OUT UINT32             *OperationPresent,
  OUT UINT32             *Response
  )
{
  UINT32  ReturnCode;

  if ((OperationPresent == NULL) || (Response == NULL)) {
    return EFI_INVALID_PARAMETER;
  }

  ReturnCode = Tcg2PhysicalPresenceLibReturnOperationResponseToOsFunction (OperationPresent, Response);
  if (ReturnCode == TCG_PP_RETURN_TPM_OPERATION_RESPONSE_SUCCESS) {
    return EFI_SUCCESS;
  } else {
    return EFI_UNSUPPORTED;
  }
}

EFI_TCG2_PROTOCOL mTcg2Protocol = {
    Tcg2GetCapability,
    Tcg2GetEventLog,
    Tcg2HashLogExtendEvent,
    Tcg2SubmitCommand,
    Tcg2GetActivePCRBanks,
    Tcg2SetActivePCRBanks,
    Tcg2GetResultOfSetActivePcrBanks,
};

/**
  Initialize the Event Log and log events passed from the PEI phase.

  @retval EFI_SUCCESS           Operation completed successfully.
  @retval EFI_OUT_OF_RESOURCES  Out of memory.

**/
EFI_STATUS
SetupEventLog (
  VOID
  )
{
  EFI_STATUS                      Status;
  VOID                            *TcgEvent;
  EFI_PEI_HOB_POINTERS            GuidHob;
  EFI_PHYSICAL_ADDRESS            Lasa;
  UINTN                           Index;
  VOID                            *DigestListBin;
  TPML_DIGEST_VALUES              TempDigestListBin;
  UINT32                          DigestListBinSize;
  UINT8                           *Event;
  UINT32                          EventSize;
  UINT32                          *EventSizePtr;
  UINT32                          HashAlgorithmMaskCopied;
  TCG_EfiSpecIDEventStruct        *TcgEfiSpecIdEventStruct;
  UINT8                           TempBuf[sizeof(TCG_EfiSpecIDEventStruct) + sizeof(UINT32) + (HASH_COUNT * sizeof(TCG_EfiSpecIdEventAlgorithmSize)) + sizeof(UINT8)];
  TCG_PCR_EVENT_HDR               SpecIdEvent;
  TCG_PCR_EVENT2_HDR              NoActionEvent;
  TCG_EfiSpecIdEventAlgorithmSize *DigestSize;
  TCG_EfiSpecIdEventAlgorithmSize *TempDigestSize;
  UINT8                           *VendorInfoSize;
  UINT32                          NumberOfAlgorithms;
  TCG_EfiStartupLocalityEvent     StartupLocalityEvent;

  DEBUG ((DEBUG_INFO, "SetupEventLog\n"));

  //
  // 1. Create Log Area
  //
  for (Index = 0; Index < sizeof(mTcg2EventInfo)/sizeof(mTcg2EventInfo[0]); Index++) {
    if ((mTcgDxeData.BsCap.SupportedEventLogs & mTcg2EventInfo[Index].LogFormat) != 0) {
      mTcgDxeData.EventLogAreaStruct[Index].EventLogFormat = mTcg2EventInfo[Index].LogFormat;
      if (PcdGet8(PcdTpm2AcpiTableRev) >= 4) {
        Status = gBS->AllocatePages (
                        AllocateAnyPages,
                        EfiACPIMemoryNVS,
                        EFI_SIZE_TO_PAGES (PcdGet32 (PcdTcgLogAreaMinLen)),
                        &Lasa
                        );
      } else {
        Status = gBS->AllocatePages (
                        AllocateAnyPages,
                        EfiBootServicesData,
                        EFI_SIZE_TO_PAGES (PcdGet32 (PcdTcgLogAreaMinLen)),
                        &Lasa
                        );
      }
      if (EFI_ERROR (Status)) {
        return Status;
      }
      mTcgDxeData.EventLogAreaStruct[Index].Lasa = Lasa;
      mTcgDxeData.EventLogAreaStruct[Index].Laml = PcdGet32 (PcdTcgLogAreaMinLen);
      mTcgDxeData.EventLogAreaStruct[Index].Next800155EventOffset = 0;

      if ((PcdGet8(PcdTpm2AcpiTableRev) >= 4) ||
          (mTcg2EventInfo[Index].LogFormat == EFI_TCG2_EVENT_LOG_FORMAT_TCG_2)) {
        //
        // Report TCG2 event log address and length, so that they can be reported in TPM2 ACPI table.
        // Ignore the return status, because those fields are optional.
        //
        PcdSet32S(PcdTpm2AcpiTableLaml, (UINT32)mTcgDxeData.EventLogAreaStruct[Index].Laml);
        PcdSet64S(PcdTpm2AcpiTableLasa, mTcgDxeData.EventLogAreaStruct[Index].Lasa);
      }

      //
      // To initialize them as 0xFF is recommended
      // because the OS can know the last entry for that.
      //
      SetMem ((VOID *)(UINTN)Lasa, PcdGet32 (PcdTcgLogAreaMinLen), 0xFF);
      //
      // Create first entry for Log Header Entry Data
      //
      if (mTcg2EventInfo[Index].LogFormat != EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2) {
        //
        // TcgEfiSpecIdEventStruct
        //
        TcgEfiSpecIdEventStruct = (TCG_EfiSpecIDEventStruct *)TempBuf;
        CopyMem (TcgEfiSpecIdEventStruct->signature, TCG_EfiSpecIDEventStruct_SIGNATURE_03, sizeof(TcgEfiSpecIdEventStruct->signature));
        TcgEfiSpecIdEventStruct->platformClass = PcdGet8 (PcdTpmPlatformClass);
        TcgEfiSpecIdEventStruct->specVersionMajor = TCG_EfiSpecIDEventStruct_SPEC_VERSION_MAJOR_TPM2;
        TcgEfiSpecIdEventStruct->specVersionMinor = TCG_EfiSpecIDEventStruct_SPEC_VERSION_MINOR_TPM2;
        TcgEfiSpecIdEventStruct->specErrata = (UINT8)PcdGet32(PcdTcgPfpMeasurementRevision);
        TcgEfiSpecIdEventStruct->uintnSize = sizeof(UINTN)/sizeof(UINT32);
        NumberOfAlgorithms = 0;
        DigestSize = (TCG_EfiSpecIdEventAlgorithmSize *)((UINT8 *)TcgEfiSpecIdEventStruct + sizeof(*TcgEfiSpecIdEventStruct) + sizeof(NumberOfAlgorithms));
        if ((mTcgDxeData.BsCap.ActivePcrBanks & EFI_TCG2_BOOT_HASH_ALG_SHA1) != 0) {
          TempDigestSize = DigestSize;
          TempDigestSize += NumberOfAlgorithms;
          TempDigestSize->algorithmId = TPM_ALG_SHA1;
          TempDigestSize->digestSize = SHA1_DIGEST_SIZE;
          NumberOfAlgorithms++;
        }
        if ((mTcgDxeData.BsCap.ActivePcrBanks & EFI_TCG2_BOOT_HASH_ALG_SHA256) != 0) {
          TempDigestSize = DigestSize;
          TempDigestSize += NumberOfAlgorithms;
          TempDigestSize->algorithmId = TPM_ALG_SHA256;
          TempDigestSize->digestSize = SHA256_DIGEST_SIZE;
          NumberOfAlgorithms++;
        }
        if ((mTcgDxeData.BsCap.ActivePcrBanks & EFI_TCG2_BOOT_HASH_ALG_SHA384) != 0) {
          TempDigestSize = DigestSize;
          TempDigestSize += NumberOfAlgorithms;
          TempDigestSize->algorithmId = TPM_ALG_SHA384;
          TempDigestSize->digestSize = SHA384_DIGEST_SIZE;
          NumberOfAlgorithms++;
        }
        if ((mTcgDxeData.BsCap.ActivePcrBanks & EFI_TCG2_BOOT_HASH_ALG_SHA512) != 0) {
          TempDigestSize = DigestSize;
          TempDigestSize += NumberOfAlgorithms;
          TempDigestSize->algorithmId = TPM_ALG_SHA512;
          TempDigestSize->digestSize = SHA512_DIGEST_SIZE;
          NumberOfAlgorithms++;
        }
        if ((mTcgDxeData.BsCap.ActivePcrBanks & EFI_TCG2_BOOT_HASH_ALG_SM3_256) != 0) {
          TempDigestSize = DigestSize;
          TempDigestSize += NumberOfAlgorithms;
          TempDigestSize->algorithmId = TPM_ALG_SM3_256;
          TempDigestSize->digestSize = SM3_256_DIGEST_SIZE;
          NumberOfAlgorithms++;
        }
        CopyMem (TcgEfiSpecIdEventStruct + 1, &NumberOfAlgorithms, sizeof(NumberOfAlgorithms));
        TempDigestSize = DigestSize;
        TempDigestSize += NumberOfAlgorithms;
        VendorInfoSize = (UINT8 *)TempDigestSize;
        *VendorInfoSize = 0;

        SpecIdEvent.PCRIndex = 0;
        SpecIdEvent.EventType = EV_NO_ACTION;
        ZeroMem (&SpecIdEvent.Digest, sizeof(SpecIdEvent.Digest));
        SpecIdEvent.EventSize = (UINT32)GetTcgEfiSpecIdEventStructSize (TcgEfiSpecIdEventStruct);

        //
        // Log TcgEfiSpecIdEventStruct as the first Event. Event format is TCG_PCR_EVENT.
        //   TCG EFI Protocol Spec. Section 5.3 Event Log Header
        //   TCG PC Client PFP spec. Section 9.2 Measurement Event Entries and Log
        //
        Status = TcgDxeLogEvent (
                   mTcg2EventInfo[Index].LogFormat,
                   &SpecIdEvent,
                   sizeof(SpecIdEvent),
                   (UINT8 *)TcgEfiSpecIdEventStruct,
                   SpecIdEvent.EventSize
                   );
        //
        // record the offset at the end of 800-155 event.
        // the future 800-155 event can be inserted here.
        //
        mTcgDxeData.EventLogAreaStruct[Index].Next800155EventOffset = \
          mTcgDxeData.EventLogAreaStruct[Index].EventLogSize;

        //
        // Tcg800155PlatformIdEvent. Event format is TCG_PCR_EVENT2
        //
        GuidHob.Guid = GetFirstGuidHob (&gTcg800155PlatformIdEventHobGuid);
        while (GuidHob.Guid != NULL) {
          InitNoActionEvent(&NoActionEvent, GET_GUID_HOB_DATA_SIZE (GuidHob.Guid));

          Status = TcgDxeLogEvent (
                     mTcg2EventInfo[Index].LogFormat,
                     &NoActionEvent,
                     sizeof(NoActionEvent.PCRIndex) + sizeof(NoActionEvent.EventType) + GetDigestListBinSize (&NoActionEvent.Digests) + sizeof(NoActionEvent.EventSize),
                     GET_GUID_HOB_DATA (GuidHob.Guid),
                     GET_GUID_HOB_DATA_SIZE (GuidHob.Guid)
                     );

          GuidHob.Guid = GET_NEXT_HOB (GuidHob);
          GuidHob.Guid = GetNextGuidHob (&gTcg800155PlatformIdEventHobGuid, GuidHob.Guid);
        }

        //
        // EfiStartupLocalityEvent. Event format is TCG_PCR_EVENT2
        //
        GuidHob.Guid = GetFirstGuidHob (&gTpm2StartupLocalityHobGuid);
        if (GuidHob.Guid != NULL) {
          //
          // Get Locality Indicator from StartupLocality HOB
          //
          StartupLocalityEvent.StartupLocality = *(UINT8 *)(GET_GUID_HOB_DATA (GuidHob.Guid));
          CopyMem (StartupLocalityEvent.Signature, TCG_EfiStartupLocalityEvent_SIGNATURE, sizeof(StartupLocalityEvent.Signature));
          DEBUG ((DEBUG_INFO, "SetupEventLog: Set Locality from HOB into StartupLocalityEvent 0x%02x\n", StartupLocalityEvent.StartupLocality));

          //
          // Initialize StartupLocalityEvent
          //
          InitNoActionEvent(&NoActionEvent, sizeof(StartupLocalityEvent));

          //
          // Log EfiStartupLocalityEvent as the second Event
          //   TCG PC Client PFP spec. Section 9.3.4.3 Startup Locality Event
          //
          Status = TcgDxeLogEvent (
                     mTcg2EventInfo[Index].LogFormat,
                     &NoActionEvent,
                     sizeof(NoActionEvent.PCRIndex) + sizeof(NoActionEvent.EventType) + GetDigestListBinSize (&NoActionEvent.Digests) + sizeof(NoActionEvent.EventSize),
                     (UINT8 *)&StartupLocalityEvent,
                     sizeof(StartupLocalityEvent)
                     );

        }
      }
    }
  }

  //
  // 2. Create Final Log Area
  //
  for (Index = 0; Index < sizeof(mTcg2EventInfo)/sizeof(mTcg2EventInfo[0]); Index++) {
    if ((mTcgDxeData.BsCap.SupportedEventLogs & mTcg2EventInfo[Index].LogFormat) != 0) {
      if (mTcg2EventInfo[Index].LogFormat == EFI_TCG2_EVENT_LOG_FORMAT_TCG_2) {
        Status = gBS->AllocatePages (
                        AllocateAnyPages,
                        EfiACPIMemoryNVS,
                        EFI_SIZE_TO_PAGES (PcdGet32 (PcdTcg2FinalLogAreaLen)),
                        &Lasa
                        );
        if (EFI_ERROR (Status)) {
          return Status;
        }
        SetMem ((VOID *)(UINTN)Lasa, PcdGet32 (PcdTcg2FinalLogAreaLen), 0xFF);

        //
        // Initialize
        //
        mTcgDxeData.FinalEventsTable[Index] = (VOID *)(UINTN)Lasa;
        (mTcgDxeData.FinalEventsTable[Index])->Version = EFI_TCG2_FINAL_EVENTS_TABLE_VERSION;
        (mTcgDxeData.FinalEventsTable[Index])->NumberOfEvents = 0;

        mTcgDxeData.FinalEventLogAreaStruct[Index].EventLogFormat = mTcg2EventInfo[Index].LogFormat;
        mTcgDxeData.FinalEventLogAreaStruct[Index].Lasa = Lasa + sizeof(EFI_TCG2_FINAL_EVENTS_TABLE);
        mTcgDxeData.FinalEventLogAreaStruct[Index].Laml = PcdGet32 (PcdTcg2FinalLogAreaLen) - sizeof(EFI_TCG2_FINAL_EVENTS_TABLE);
        mTcgDxeData.FinalEventLogAreaStruct[Index].EventLogSize = 0;
        mTcgDxeData.FinalEventLogAreaStruct[Index].LastEvent = (VOID *)(UINTN)mTcgDxeData.FinalEventLogAreaStruct[Index].Lasa;
        mTcgDxeData.FinalEventLogAreaStruct[Index].EventLogStarted = FALSE;
        mTcgDxeData.FinalEventLogAreaStruct[Index].EventLogTruncated = FALSE;
        mTcgDxeData.FinalEventLogAreaStruct[Index].Next800155EventOffset = 0;

        //
        // Install to configuration table for EFI_TCG2_EVENT_LOG_FORMAT_TCG_2
        //
        Status = gBS->InstallConfigurationTable (&gEfiTcg2FinalEventsTableGuid, (VOID *)mTcgDxeData.FinalEventsTable[Index]);
        if (EFI_ERROR (Status)) {
          return Status;
        }
      } else {
        //
        // No need to handle EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2
        //
        mTcgDxeData.FinalEventsTable[Index] = NULL;
        mTcgDxeData.FinalEventLogAreaStruct[Index].EventLogFormat = mTcg2EventInfo[Index].LogFormat;
        mTcgDxeData.FinalEventLogAreaStruct[Index].Lasa = 0;
        mTcgDxeData.FinalEventLogAreaStruct[Index].Laml = 0;
        mTcgDxeData.FinalEventLogAreaStruct[Index].EventLogSize = 0;
        mTcgDxeData.FinalEventLogAreaStruct[Index].LastEvent = 0;
        mTcgDxeData.FinalEventLogAreaStruct[Index].EventLogStarted = FALSE;
        mTcgDxeData.FinalEventLogAreaStruct[Index].EventLogTruncated = FALSE;
        mTcgDxeData.FinalEventLogAreaStruct[Index].Next800155EventOffset = 0;
      }
    }
  }

  //
  // 3. Sync data from PEI to DXE
  //
  Status = EFI_SUCCESS;
  for (Index = 0; Index < sizeof(mTcg2EventInfo)/sizeof(mTcg2EventInfo[0]); Index++) {
    if ((mTcgDxeData.BsCap.SupportedEventLogs & mTcg2EventInfo[Index].LogFormat) != 0) {
      GuidHob.Raw = GetHobList ();
      Status = EFI_SUCCESS;
      while (!EFI_ERROR (Status) &&
             (GuidHob.Raw = GetNextGuidHob (mTcg2EventInfo[Index].EventGuid, GuidHob.Raw)) != NULL) {
        TcgEvent    = AllocateCopyPool (GET_GUID_HOB_DATA_SIZE (GuidHob.Guid), GET_GUID_HOB_DATA (GuidHob.Guid));
        ASSERT (TcgEvent != NULL);
        GuidHob.Raw = GET_NEXT_HOB (GuidHob);
        switch (mTcg2EventInfo[Index].LogFormat) {
        case EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2:
          Status = TcgDxeLogEvent (
                     mTcg2EventInfo[Index].LogFormat,
                     TcgEvent,
                     sizeof(TCG_PCR_EVENT_HDR),
                     ((TCG_PCR_EVENT*)TcgEvent)->Event,
                     ((TCG_PCR_EVENT_HDR*)TcgEvent)->EventSize
                     );
          break;
        case EFI_TCG2_EVENT_LOG_FORMAT_TCG_2:
          DigestListBin = (UINT8 *)TcgEvent + sizeof(TCG_PCRINDEX) + sizeof(TCG_EVENTTYPE);
          DigestListBinSize = GetDigestListBinSize (DigestListBin);
          //
          // Save event size.
          //
          CopyMem (&EventSize, (UINT8 *)DigestListBin + DigestListBinSize, sizeof(UINT32));
          Event = (UINT8 *)DigestListBin + DigestListBinSize + sizeof(UINT32);
          //
          // Filter inactive digest in the event2 log from PEI HOB.
          //
          CopyMem (&TempDigestListBin, DigestListBin, GetDigestListBinSize (DigestListBin));
          EventSizePtr = CopyDigestListBinToBuffer (
                           DigestListBin,
                           &TempDigestListBin,
                           mTcgDxeData.BsCap.ActivePcrBanks,
                           &HashAlgorithmMaskCopied
                           );
          if (HashAlgorithmMaskCopied != mTcgDxeData.BsCap.ActivePcrBanks) {
            DEBUG ((
              DEBUG_ERROR,
              "ERROR: The event2 log includes digest hash mask 0x%x, but required digest hash mask is 0x%x\n",
              HashAlgorithmMaskCopied,
              mTcgDxeData.BsCap.ActivePcrBanks
              ));
          }
          //
          // Restore event size.
          //
          CopyMem (EventSizePtr, &EventSize, sizeof(UINT32));
          DigestListBinSize = GetDigestListBinSize (DigestListBin);

          Status = TcgDxeLogEvent (
                     mTcg2EventInfo[Index].LogFormat,
                     TcgEvent,
                     sizeof(TCG_PCRINDEX) + sizeof(TCG_EVENTTYPE) + DigestListBinSize + sizeof(UINT32),
                     Event,
                     EventSize
                     );
          break;
        }
        FreePool (TcgEvent);
      }
    }
  }

  return Status;
}

/**
  Measure and log an action string, and extend the measurement result into PCR[PCRIndex].

  @param[in] PCRIndex         PCRIndex to extend
  @param[in] String           A specific string that indicates an Action event.

  @retval EFI_SUCCESS         Operation completed successfully.
  @retval EFI_DEVICE_ERROR    The operation was unsuccessful.

**/
EFI_STATUS
TcgMeasureAction (
  IN      TPM_PCRINDEX       PCRIndex,
  IN      CHAR8              *String
  )
{
  TCG_PCR_EVENT_HDR                 TcgEvent;

  TcgEvent.PCRIndex  = PCRIndex;
  TcgEvent.EventType = EV_EFI_ACTION;
  TcgEvent.EventSize = (UINT32)AsciiStrLen (String);
  return TcgDxeHashLogExtendEvent (
           0,
           (UINT8*)String,
           TcgEvent.EventSize,
           &TcgEvent,
           (UINT8 *) String
           );
}

/**
  Measure and log EFI handoff tables, and extend the measurement result into PCR[1].

  @retval EFI_SUCCESS         Operation completed successfully.
  @retval EFI_DEVICE_ERROR    The operation was unsuccessful.

**/
EFI_STATUS
MeasureHandoffTables (
  VOID
  )
{
  EFI_STATUS                        Status;
  TCG_PCR_EVENT_HDR                 TcgEvent;
  EFI_HANDOFF_TABLE_POINTERS        HandoffTables;
  UINTN                             ProcessorNum;
  EFI_CPU_PHYSICAL_LOCATION         *ProcessorLocBuf;

  ProcessorLocBuf = NULL;
  Status = EFI_SUCCESS;

  if (PcdGet8 (PcdTpmPlatformClass) == TCG_PLATFORM_TYPE_SERVER) {
    //
    // Tcg Server spec.
    // Measure each processor EFI_CPU_PHYSICAL_LOCATION with EV_TABLE_OF_DEVICES to PCR[1]
    //
    Status = GetProcessorsCpuLocation(&ProcessorLocBuf, &ProcessorNum);

    if (!EFI_ERROR(Status)){
      TcgEvent.PCRIndex  = 1;
      TcgEvent.EventType = EV_TABLE_OF_DEVICES;
      TcgEvent.EventSize = sizeof (HandoffTables);

      HandoffTables.NumberOfTables = 1;
      HandoffTables.TableEntry[0].VendorGuid  = gEfiMpServiceProtocolGuid;
      HandoffTables.TableEntry[0].VendorTable = ProcessorLocBuf;

      Status = TcgDxeHashLogExtendEvent (
                 0,
                 (UINT8*)(UINTN)ProcessorLocBuf,
                 sizeof(EFI_CPU_PHYSICAL_LOCATION) * ProcessorNum,
                 &TcgEvent,
                 (UINT8*)&HandoffTables
                 );

      FreePool(ProcessorLocBuf);
    }
  }

  return Status;
}

/**
  Measure and log Separator event, 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
MeasureSeparatorEvent (
  IN      TPM_PCRINDEX              PCRIndex
  )
{
  TCG_PCR_EVENT_HDR                 TcgEvent;
  UINT32                            EventData;

  DEBUG ((DEBUG_INFO, "MeasureSeparatorEvent Pcr - %x\n", PCRIndex));

  EventData = 0;
  TcgEvent.PCRIndex  = PCRIndex;
  TcgEvent.EventType = EV_SEPARATOR;
  TcgEvent.EventSize = (UINT32)sizeof (EventData);
  return TcgDxeHashLogExtendEvent (
           0,
           (UINT8 *)&EventData,
           sizeof (EventData),
           &TcgEvent,
           (UINT8 *)&EventData
           );
}

/**
  Measure and log an EFI variable, and extend the measurement result into a specific PCR.

  @param[in]  PCRIndex          PCR Index.
  @param[in]  EventType         Event type.
  @param[in]  VarName           A Null-terminated string that is the name of the vendor's variable.
  @param[in]  VendorGuid        A unique identifier for the vendor.
  @param[in]  VarData           The content of the variable data.
  @param[in]  VarSize           The size of the variable data.

  @retval EFI_SUCCESS           Operation completed successfully.
  @retval EFI_OUT_OF_RESOURCES  Out of memory.
  @retval EFI_DEVICE_ERROR      The operation was unsuccessful.

**/
EFI_STATUS
MeasureVariable (
  IN      TPM_PCRINDEX              PCRIndex,
  IN      TCG_EVENTTYPE             EventType,
  IN      CHAR16                    *VarName,
  IN      EFI_GUID                  *VendorGuid,
  IN      VOID                      *VarData,
  IN      UINTN                     VarSize
  )
{
  EFI_STATUS                        Status;
  TCG_PCR_EVENT_HDR                 TcgEvent;
  UINTN                             VarNameLength;
  UEFI_VARIABLE_DATA                *VarLog;

  DEBUG ((DEBUG_INFO, "Tcg2Dxe: MeasureVariable (Pcr - %x, EventType - %x, ", (UINTN)PCRIndex, (UINTN)EventType));
  DEBUG ((DEBUG_INFO, "VariableName - %s, VendorGuid - %g)\n", VarName, VendorGuid));

  VarNameLength      = StrLen (VarName);
  TcgEvent.PCRIndex  = PCRIndex;
  TcgEvent.EventType = EventType;

  TcgEvent.EventSize = (UINT32)(sizeof (*VarLog) + VarNameLength * sizeof (*VarName) + VarSize
                        - sizeof (VarLog->UnicodeName) - sizeof (VarLog->VariableData));

  VarLog = (UEFI_VARIABLE_DATA *)AllocatePool (TcgEvent.EventSize);
  if (VarLog == NULL) {
    return EFI_OUT_OF_RESOURCES;
  }

  VarLog->VariableName       = *VendorGuid;
  VarLog->UnicodeNameLength  = VarNameLength;
  VarLog->VariableDataLength = VarSize;
  CopyMem (
     VarLog->UnicodeName,
     VarName,
     VarNameLength * sizeof (*VarName)
     );
  if (VarSize != 0 && VarData != NULL) {
    CopyMem (
       (CHAR16 *)VarLog->UnicodeName + VarNameLength,
       VarData,
       VarSize
       );
  }

  if (EventType == EV_EFI_VARIABLE_DRIVER_CONFIG) {
    //
    // Digest is the event data (UEFI_VARIABLE_DATA)
    //
    Status = TcgDxeHashLogExtendEvent (
               0,
               (UINT8*)VarLog,
               TcgEvent.EventSize,
               &TcgEvent,
               (UINT8*)VarLog
               );
  } else {
    ASSERT (VarData != NULL);
    Status = TcgDxeHashLogExtendEvent (
               0,
               (UINT8*)VarData,
               VarSize,
               &TcgEvent,
               (UINT8*)VarLog
               );
  }
  FreePool (VarLog);
  return Status;
}

/**
  Read then Measure and log an EFI variable, and extend the measurement result into a specific PCR.

  @param[in]  PCRIndex          PCR Index.
  @param[in]  EventType         Event type.
  @param[in]   VarName          A Null-terminated string that is the name of the vendor's variable.
  @param[in]   VendorGuid       A unique identifier for the vendor.
  @param[out]  VarSize          The size of the variable data.
  @param[out]  VarData          Pointer to the content of the variable.

  @retval EFI_SUCCESS           Operation completed successfully.
  @retval EFI_OUT_OF_RESOURCES  Out of memory.
  @retval EFI_DEVICE_ERROR      The operation was unsuccessful.

**/
EFI_STATUS
ReadAndMeasureVariable (
  IN      TPM_PCRINDEX              PCRIndex,
  IN      TCG_EVENTTYPE             EventType,
  IN      CHAR16                    *VarName,
  IN      EFI_GUID                  *VendorGuid,
  OUT     UINTN                     *VarSize,
  OUT     VOID                      **VarData
  )
{
  EFI_STATUS                        Status;

  Status = GetVariable2 (VarName, VendorGuid, VarData, VarSize);
  if (EventType == EV_EFI_VARIABLE_DRIVER_CONFIG) {
    if (EFI_ERROR (Status)) {
      //
      // It is valid case, so we need handle it.
      //
      *VarData = NULL;
      *VarSize = 0;
    }
  } else {
    //
    // if status error, VarData is freed and set NULL by GetVariable2
    //
    if (EFI_ERROR (Status)) {
      return EFI_NOT_FOUND;
    }
  }

  Status = MeasureVariable (
             PCRIndex,
             EventType,
             VarName,
             VendorGuid,
             *VarData,
             *VarSize
             );
  return Status;
}

/**
  Read then Measure and log an EFI boot variable, and extend the measurement result into PCR[1].
according to TCG PC Client PFP spec 0021 Section 2.4.4.2

  @param[in]   VarName          A Null-terminated string that is the name of the vendor's variable.
  @param[in]   VendorGuid       A unique identifier for the vendor.
  @param[out]  VarSize          The size of the variable data.
  @param[out]  VarData          Pointer to the content of the variable.

  @retval EFI_SUCCESS           Operation completed successfully.
  @retval EFI_OUT_OF_RESOURCES  Out of memory.
  @retval EFI_DEVICE_ERROR      The operation was unsuccessful.

**/
EFI_STATUS
ReadAndMeasureBootVariable (
  IN      CHAR16                    *VarName,
  IN      EFI_GUID                  *VendorGuid,
  OUT     UINTN                     *VarSize,
  OUT     VOID                      **VarData
  )
{
  return ReadAndMeasureVariable (
           1,
           EV_EFI_VARIABLE_BOOT,
           VarName,
           VendorGuid,
           VarSize,
           VarData
           );
}

/**
  Read then Measure and log an EFI Secure variable, and extend the measurement result into PCR[7].

  @param[in]   VarName          A Null-terminated string that is the name of the vendor's variable.
  @param[in]   VendorGuid       A unique identifier for the vendor.
  @param[out]  VarSize          The size of the variable data.
  @param[out]  VarData          Pointer to the content of the variable.

  @retval EFI_SUCCESS           Operation completed successfully.
  @retval EFI_OUT_OF_RESOURCES  Out of memory.
  @retval EFI_DEVICE_ERROR      The operation was unsuccessful.

**/
EFI_STATUS
ReadAndMeasureSecureVariable (
  IN      CHAR16                    *VarName,
  IN      EFI_GUID                  *VendorGuid,
  OUT     UINTN                     *VarSize,
  OUT     VOID                      **VarData
  )
{
  return ReadAndMeasureVariable (
           7,
           EV_EFI_VARIABLE_DRIVER_CONFIG,
           VarName,
           VendorGuid,
           VarSize,
           VarData
           );
}

/**
  Measure and log all EFI boot variables, and extend the measurement result into a specific PCR.

  The EFI boot variables are BootOrder and Boot#### variables.

  @retval EFI_SUCCESS           Operation completed successfully.
  @retval EFI_OUT_OF_RESOURCES  Out of memory.
  @retval EFI_DEVICE_ERROR      The operation was unsuccessful.

**/
EFI_STATUS
MeasureAllBootVariables (
  VOID
  )
{
  EFI_STATUS                        Status;
  UINT16                            *BootOrder;
  UINTN                             BootCount;
  UINTN                             Index;
  VOID                              *BootVarData;
  UINTN                             Size;

  Status = ReadAndMeasureBootVariable (
             mBootVarName,
             &gEfiGlobalVariableGuid,
             &BootCount,
             (VOID **) &BootOrder
             );
  if (Status == EFI_NOT_FOUND || BootOrder == NULL) {
    return EFI_SUCCESS;
  }

  if (EFI_ERROR (Status)) {
    //
    // BootOrder can't be NULL if status is not EFI_NOT_FOUND
    //
    FreePool (BootOrder);
    return Status;
  }

  BootCount /= sizeof (*BootOrder);
  for (Index = 0; Index < BootCount; Index++) {
    UnicodeSPrint (mBootVarName, sizeof (mBootVarName), L"Boot%04x", BootOrder[Index]);
    Status = ReadAndMeasureBootVariable (
               mBootVarName,
               &gEfiGlobalVariableGuid,
               &Size,
               &BootVarData
               );
    if (!EFI_ERROR (Status)) {
      FreePool (BootVarData);
    }
  }

  FreePool (BootOrder);
  return EFI_SUCCESS;
}

/**
  Measure and log all EFI Secure variables, and extend the measurement result into a specific PCR.

  The EFI boot variables are BootOrder and Boot#### variables.

  @retval EFI_SUCCESS           Operation completed successfully.
  @retval EFI_OUT_OF_RESOURCES  Out of memory.
  @retval EFI_DEVICE_ERROR      The operation was unsuccessful.

**/
EFI_STATUS
MeasureAllSecureVariables (
  VOID
  )
{
  EFI_STATUS                        Status;
  VOID                              *Data;
  UINTN                             DataSize;
  UINTN                             Index;

  Status = EFI_NOT_FOUND;
  for (Index = 0; Index < sizeof(mVariableType)/sizeof(mVariableType[0]); Index++) {
    Status = ReadAndMeasureSecureVariable (
               mVariableType[Index].VariableName,
               mVariableType[Index].VendorGuid,
               &DataSize,
               &Data
               );
    if (!EFI_ERROR (Status)) {
      if (Data != NULL) {
        FreePool (Data);
      }
    }
  }

  //
  // Measure DBT if present and not empty
  //
  Status = GetVariable2 (EFI_IMAGE_SECURITY_DATABASE2, &gEfiImageSecurityDatabaseGuid, &Data, &DataSize);
  if (!EFI_ERROR(Status)) {
    Status = MeasureVariable (
               7,
               EV_EFI_VARIABLE_DRIVER_CONFIG,
               EFI_IMAGE_SECURITY_DATABASE2,
               &gEfiImageSecurityDatabaseGuid,
               Data,
               DataSize
               );
    FreePool(Data);
  } else {
    DEBUG((DEBUG_INFO, "Skip measuring variable %s since it's deleted\n", EFI_IMAGE_SECURITY_DATABASE2));
  }

  return EFI_SUCCESS;
}

/**
  Measure and log launch of FirmwareDebugger, and extend the measurement result into a specific PCR.

  @retval EFI_SUCCESS           Operation completed successfully.
  @retval EFI_OUT_OF_RESOURCES  Out of memory.
  @retval EFI_DEVICE_ERROR      The operation was unsuccessful.

**/
EFI_STATUS
MeasureLaunchOfFirmwareDebugger (
  VOID
  )
{
  TCG_PCR_EVENT_HDR                 TcgEvent;

  TcgEvent.PCRIndex  = 7;
  TcgEvent.EventType = EV_EFI_ACTION;
  TcgEvent.EventSize = sizeof(FIRMWARE_DEBUGGER_EVENT_STRING) - 1;
  return TcgDxeHashLogExtendEvent (
           0,
           (UINT8 *)FIRMWARE_DEBUGGER_EVENT_STRING,
           sizeof(FIRMWARE_DEBUGGER_EVENT_STRING) - 1,
           &TcgEvent,
           (UINT8 *)FIRMWARE_DEBUGGER_EVENT_STRING
           );
}

/**
  Measure and log all Secure Boot Policy, and extend the measurement result into a specific PCR.

  Platform firmware adhering to the policy must therefore measure the following values into PCR[7]: (in order listed)
   - The contents of the SecureBoot variable
   - The contents of the PK variable
   - The contents of the KEK variable
   - The contents of the EFI_IMAGE_SECURITY_DATABASE variable
   - The contents of the EFI_IMAGE_SECURITY_DATABASE1 variable
   - Separator
   - Entries in the EFI_IMAGE_SECURITY_DATABASE that are used to validate EFI Drivers or EFI Boot Applications in the boot path

  NOTE: Because of the above, UEFI variables PK, KEK, EFI_IMAGE_SECURITY_DATABASE,
  EFI_IMAGE_SECURITY_DATABASE1 and SecureBoot SHALL NOT be measured into PCR[3].

  @param[in]  Event     Event whose notification function is being invoked
  @param[in]  Context   Pointer to the notification function's context
**/
VOID
EFIAPI
MeasureSecureBootPolicy (
  IN EFI_EVENT                      Event,
  IN VOID                           *Context
  )
{
  EFI_STATUS  Status;
  VOID        *Protocol;

  Status = gBS->LocateProtocol (&gEfiVariableWriteArchProtocolGuid, NULL, (VOID **)&Protocol);
  if (EFI_ERROR (Status)) {
    return;
  }

  if (PcdGetBool (PcdFirmwareDebuggerInitialized)) {
    Status = MeasureLaunchOfFirmwareDebugger ();
    DEBUG ((DEBUG_INFO, "MeasureLaunchOfFirmwareDebugger - %r\n", Status));
  }

  Status = MeasureAllSecureVariables ();
  DEBUG ((DEBUG_INFO, "MeasureAllSecureVariables - %r\n", Status));

  //
  // We need measure Separator(7) here, because this event must be between SecureBootPolicy (Configure)
  // and ImageVerification (Authority)
  // There might be a case that we need measure UEFI image from DriverOrder, besides BootOrder. So
  // the Authority measurement happen before ReadToBoot event.
  //
  Status = MeasureSeparatorEvent (7);
  DEBUG ((DEBUG_INFO, "MeasureSeparatorEvent - %r\n", Status));
  return ;
}

/**
  Ready to Boot Event notification handler.

  Sequence of OS boot events is measured in this event notification handler.

  @param[in]  Event     Event whose notification function is being invoked
  @param[in]  Context   Pointer to the notification function's context

**/
VOID
EFIAPI
OnReadyToBoot (
  IN      EFI_EVENT                 Event,
  IN      VOID                      *Context
  )
{
  EFI_STATUS                        Status;
  TPM_PCRINDEX                      PcrIndex;

  PERF_START_EX (mImageHandle, "EventRec", "Tcg2Dxe", 0, PERF_ID_TCG2_DXE);
  if (mBootAttempts == 0) {

    //
    // Measure handoff tables.
    //
    Status = MeasureHandoffTables ();
    if (EFI_ERROR (Status)) {
      DEBUG ((DEBUG_ERROR, "HOBs not Measured. Error!\n"));
    }

    //
    // Measure BootOrder & Boot#### variables.
    //
    Status = MeasureAllBootVariables ();
    if (EFI_ERROR (Status)) {
      DEBUG ((DEBUG_ERROR, "Boot Variables not Measured. Error!\n"));
    }

    //
    // 1. This is the first boot attempt.
    //
    Status = TcgMeasureAction (
               4,
               EFI_CALLING_EFI_APPLICATION
               );
    if (EFI_ERROR (Status)) {
      DEBUG ((DEBUG_ERROR, "%a not Measured. Error!\n", EFI_CALLING_EFI_APPLICATION));
    }

    //
    // 2. Draw a line between pre-boot env and entering post-boot env.
    // PCR[7] is already done.
    //
    for (PcrIndex = 0; PcrIndex < 7; PcrIndex++) {
      Status = MeasureSeparatorEvent (PcrIndex);
      if (EFI_ERROR (Status)) {
        DEBUG ((DEBUG_ERROR, "Separator Event not Measured. Error!\n"));
      }
    }

    //
    // 3. Measure GPT. It would be done in SAP driver.
    //

    //
    // 4. Measure PE/COFF OS loader. It would be done in SAP driver.
    //

    //
    // 5. Read & Measure variable. BootOrder already measured.
    //
  } else {
    //
    // 6. Not first attempt, meaning a return from last attempt
    //
    Status = TcgMeasureAction (
               4,
               EFI_RETURNING_FROM_EFI_APPLICATION
               );
    if (EFI_ERROR (Status)) {
      DEBUG ((DEBUG_ERROR, "%a not Measured. Error!\n", EFI_RETURNING_FROM_EFI_APPLICATION));
    }

    //
    // 7. Next boot attempt, measure "Calling EFI Application from Boot Option" again
    // TCG PC Client PFP spec Section 2.4.4.5 Step 4
    //
    Status = TcgMeasureAction (
               4,
               EFI_CALLING_EFI_APPLICATION
               );
    if (EFI_ERROR (Status)) {
      DEBUG ((DEBUG_ERROR, "%a not Measured. Error!\n", EFI_CALLING_EFI_APPLICATION));
    }
  }

  DEBUG ((DEBUG_INFO, "TPM2 Tcg2Dxe Measure Data when ReadyToBoot\n"));
  //
  // Increase boot attempt counter.
  //
  mBootAttempts++;
  PERF_END_EX (mImageHandle, "EventRec", "Tcg2Dxe", 0, PERF_ID_TCG2_DXE + 1);
}

/**
  Exit Boot Services Event notification handler.

  Measure invocation and success of ExitBootServices.

  @param[in]  Event     Event whose notification function is being invoked
  @param[in]  Context   Pointer to the notification function's context

**/
VOID
EFIAPI
OnExitBootServices (
  IN      EFI_EVENT                 Event,
  IN      VOID                      *Context
  )
{
  EFI_STATUS    Status;

  //
  // Measure invocation of ExitBootServices,
  //
  Status = TcgMeasureAction (
             5,
             EFI_EXIT_BOOT_SERVICES_INVOCATION
             );
  if (EFI_ERROR (Status)) {
    DEBUG ((DEBUG_ERROR, "%a not Measured. Error!\n", EFI_EXIT_BOOT_SERVICES_INVOCATION));
  }

  //
  // Measure success of ExitBootServices
  //
  Status = TcgMeasureAction (
             5,
             EFI_EXIT_BOOT_SERVICES_SUCCEEDED
             );
  if (EFI_ERROR (Status)) {
    DEBUG ((DEBUG_ERROR, "%a not Measured. Error!\n", EFI_EXIT_BOOT_SERVICES_SUCCEEDED));
  }
}

/**
  Exit Boot Services Failed Event notification handler.

  Measure Failure of ExitBootServices.

  @param[in]  Event     Event whose notification function is being invoked
  @param[in]  Context   Pointer to the notification function's context

**/
VOID
EFIAPI
OnExitBootServicesFailed (
  IN      EFI_EVENT                 Event,
  IN      VOID                      *Context
  )
{
  EFI_STATUS    Status;

  //
  // Measure Failure of ExitBootServices,
  //
  Status = TcgMeasureAction (
             5,
             EFI_EXIT_BOOT_SERVICES_FAILED
             );
  if (EFI_ERROR (Status)) {
    DEBUG ((DEBUG_ERROR, "%a not Measured. Error!\n", EFI_EXIT_BOOT_SERVICES_FAILED));
  }

}

/**
  This routine is called to properly shutdown the TPM before system reset.
  It follow chapter "12.2.3 Startup State" in Trusted Platform Module Library
  Part 1: Architecture, Revision 01.16.

  @param[in]  ResetType         The type of reset to perform.
  @param[in]  ResetStatus       The status code for the reset.
  @param[in]  DataSize          The size, in bytes, of ResetData.
  @param[in]  ResetData         For a ResetType of EfiResetCold, EfiResetWarm, or
                                EfiResetShutdown the data buffer starts with a Null-terminated
                                string, optionally followed by additional binary data.
                                The string is a description that the caller may use to further
                                indicate the reason for the system reset.
                                For a ResetType of EfiResetPlatformSpecific the data buffer
                                also starts with a Null-terminated string that is followed
                                by an EFI_GUID that describes the specific type of reset to perform.
**/
VOID
EFIAPI
ShutdownTpmOnReset (
  IN EFI_RESET_TYPE           ResetType,
  IN EFI_STATUS               ResetStatus,
  IN UINTN                    DataSize,
  IN VOID                     *ResetData OPTIONAL
  )
{
  EFI_STATUS                  Status;
  Status = Tpm2Shutdown (TPM_SU_CLEAR);
  DEBUG ((DEBUG_VERBOSE, "Tpm2Shutdown (SU_CLEAR) - %r\n", Status));
}

/**
  Hook the system reset to properly shutdown TPM.
  It follow chapter "12.2.3 Startup State" in Trusted Platform Module Library
  Part 1: Architecture, Revision 01.16.

  @param[in]  Event     Event whose notification function is being invoked
  @param[in]  Context   Pointer to the notification function's context
**/
VOID
EFIAPI
OnResetNotificationInstall (
  IN EFI_EVENT                      Event,
  IN VOID                           *Context
  )
{
  EFI_STATUS                        Status;
  EFI_RESET_NOTIFICATION_PROTOCOL   *ResetNotify;

  Status = gBS->LocateProtocol (&gEfiResetNotificationProtocolGuid, NULL, (VOID **) &ResetNotify);
  if (!EFI_ERROR (Status)) {
    Status = ResetNotify->RegisterResetNotify (ResetNotify, ShutdownTpmOnReset);
    ASSERT_EFI_ERROR (Status);
    DEBUG ((DEBUG_VERBOSE, "TCG2: Hook system reset to properly shutdown TPM.\n"));

    gBS->CloseEvent (Event);
  }
}

/**
  The function install Tcg2 protocol.

  @retval EFI_SUCCESS     Tcg2 protocol is installed.
  @retval other           Some error occurs.
**/
EFI_STATUS
InstallTcg2 (
  VOID
  )
{
  EFI_STATUS        Status;
  EFI_HANDLE        Handle;

  Handle = NULL;
  Status = gBS->InstallMultipleProtocolInterfaces (
                  &Handle,
                  &gEfiTcg2ProtocolGuid,
                  &mTcg2Protocol,
                  NULL
                  );
  return Status;
}

/**
  The driver's entry point. It publishes EFI Tcg2 Protocol.

  @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
DriverEntry (
  IN    EFI_HANDLE                  ImageHandle,
  IN    EFI_SYSTEM_TABLE            *SystemTable
  )
{
  EFI_STATUS                        Status;
  EFI_EVENT                         Event;
  VOID                              *Registration;
  UINT32                            MaxCommandSize;
  UINT32                            MaxResponseSize;
  UINTN                             Index;
  EFI_TCG2_EVENT_ALGORITHM_BITMAP   TpmHashAlgorithmBitmap;
  UINT32                            ActivePCRBanks;
  UINT32                            NumberOfPCRBanks;

  mImageHandle = ImageHandle;

  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 = Tpm2RequestUseTpm ();
  if (EFI_ERROR (Status)) {
    DEBUG ((DEBUG_ERROR, "TPM2 not detected!\n"));
    return Status;
  }

  //
  // Fill information
  //
  ASSERT (TCG_EVENT_LOG_AREA_COUNT_MAX == sizeof(mTcg2EventInfo)/sizeof(mTcg2EventInfo[0]));

  mTcgDxeData.BsCap.Size = sizeof(EFI_TCG2_BOOT_SERVICE_CAPABILITY);
  mTcgDxeData.BsCap.ProtocolVersion.Major = 1;
  mTcgDxeData.BsCap.ProtocolVersion.Minor = 1;
  mTcgDxeData.BsCap.StructureVersion.Major = 1;
  mTcgDxeData.BsCap.StructureVersion.Minor = 1;

  DEBUG ((DEBUG_INFO, "Tcg2.ProtocolVersion  - %02x.%02x\n", mTcgDxeData.BsCap.ProtocolVersion.Major, mTcgDxeData.BsCap.ProtocolVersion.Minor));
  DEBUG ((DEBUG_INFO, "Tcg2.StructureVersion - %02x.%02x\n", mTcgDxeData.BsCap.StructureVersion.Major, mTcgDxeData.BsCap.StructureVersion.Minor));

  Status = Tpm2GetCapabilityManufactureID (&mTcgDxeData.BsCap.ManufacturerID);
  if (EFI_ERROR (Status)) {
    DEBUG ((DEBUG_ERROR, "Tpm2GetCapabilityManufactureID fail!\n"));
  } else {
    DEBUG ((DEBUG_INFO, "Tpm2GetCapabilityManufactureID - %08x\n", mTcgDxeData.BsCap.ManufacturerID));
  }

  DEBUG_CODE_BEGIN ();
    UINT32                    FirmwareVersion1;
    UINT32                    FirmwareVersion2;

    Status = Tpm2GetCapabilityFirmwareVersion (&FirmwareVersion1, &FirmwareVersion2);
    if (EFI_ERROR (Status)) {
      DEBUG ((DEBUG_ERROR, "Tpm2GetCapabilityFirmwareVersion fail!\n"));
    } else {
      DEBUG ((DEBUG_INFO, "Tpm2GetCapabilityFirmwareVersion - %08x %08x\n", FirmwareVersion1, FirmwareVersion2));
    }
  DEBUG_CODE_END ();

  Status = Tpm2GetCapabilityMaxCommandResponseSize (&MaxCommandSize, &MaxResponseSize);
  if (EFI_ERROR (Status)) {
    DEBUG ((DEBUG_ERROR, "Tpm2GetCapabilityMaxCommandResponseSize fail!\n"));
  } else {
    mTcgDxeData.BsCap.MaxCommandSize  = (UINT16)MaxCommandSize;
    mTcgDxeData.BsCap.MaxResponseSize = (UINT16)MaxResponseSize;
    DEBUG ((DEBUG_INFO, "Tpm2GetCapabilityMaxCommandResponseSize - %08x, %08x\n", MaxCommandSize, MaxResponseSize));
  }

  //
  // Get supported PCR and current Active PCRs
  //
  Status = Tpm2GetCapabilitySupportedAndActivePcrs (&TpmHashAlgorithmBitmap, &ActivePCRBanks);
  ASSERT_EFI_ERROR (Status);

  mTcgDxeData.BsCap.HashAlgorithmBitmap = TpmHashAlgorithmBitmap & PcdGet32 (PcdTcg2HashAlgorithmBitmap);
  mTcgDxeData.BsCap.ActivePcrBanks = ActivePCRBanks & PcdGet32 (PcdTcg2HashAlgorithmBitmap);

  //
  // Need calculate NumberOfPCRBanks here, because HashAlgorithmBitmap might be removed by PCD.
  //
  NumberOfPCRBanks = 0;
  for (Index = 0; Index < 32; Index++) {
    if ((mTcgDxeData.BsCap.HashAlgorithmBitmap & (1u << Index)) != 0) {
      NumberOfPCRBanks++;
    }
  }

  if (PcdGet32 (PcdTcg2NumberOfPCRBanks) == 0) {
    mTcgDxeData.BsCap.NumberOfPCRBanks = NumberOfPCRBanks;
  } else {
    mTcgDxeData.BsCap.NumberOfPCRBanks = PcdGet32 (PcdTcg2NumberOfPCRBanks);
    if (PcdGet32 (PcdTcg2NumberOfPCRBanks) > NumberOfPCRBanks) {
      DEBUG ((DEBUG_ERROR, "ERROR: PcdTcg2NumberOfPCRBanks(0x%x) > NumberOfPCRBanks(0x%x)\n", PcdGet32 (PcdTcg2NumberOfPCRBanks), NumberOfPCRBanks));
      mTcgDxeData.BsCap.NumberOfPCRBanks = NumberOfPCRBanks;
    }
  }

  mTcgDxeData.BsCap.SupportedEventLogs = EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2 | EFI_TCG2_EVENT_LOG_FORMAT_TCG_2;
  if ((mTcgDxeData.BsCap.ActivePcrBanks & EFI_TCG2_BOOT_HASH_ALG_SHA1) == 0) {
    //
    // No need to expose TCG1.2 event log if SHA1 bank does not exist.
    //
    mTcgDxeData.BsCap.SupportedEventLogs &= ~EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2;
  }

  DEBUG ((DEBUG_INFO, "Tcg2.SupportedEventLogs - 0x%08x\n", mTcgDxeData.BsCap.SupportedEventLogs));
  DEBUG ((DEBUG_INFO, "Tcg2.HashAlgorithmBitmap - 0x%08x\n", mTcgDxeData.BsCap.HashAlgorithmBitmap));
  DEBUG ((DEBUG_INFO, "Tcg2.NumberOfPCRBanks      - 0x%08x\n", mTcgDxeData.BsCap.NumberOfPCRBanks));
  DEBUG ((DEBUG_INFO, "Tcg2.ActivePcrBanks        - 0x%08x\n", mTcgDxeData.BsCap.ActivePcrBanks));

  if (mTcgDxeData.BsCap.TPMPresentFlag) {
    //
    // Setup the log area and copy event log from hob list to it
    //
    Status = SetupEventLog ();
    ASSERT_EFI_ERROR (Status);

    //
    // Measure handoff tables, Boot#### variables etc.
    //
    Status = EfiCreateEventReadyToBootEx (
               TPL_CALLBACK,
               OnReadyToBoot,
               NULL,
               &Event
               );

    Status = gBS->CreateEventEx (
                    EVT_NOTIFY_SIGNAL,
                    TPL_NOTIFY,
                    OnExitBootServices,
                    NULL,
                    &gEfiEventExitBootServicesGuid,
                    &Event
                    );

    //
    // Measure Exit Boot Service failed
    //
    Status = gBS->CreateEventEx (
                    EVT_NOTIFY_SIGNAL,
                    TPL_NOTIFY,
                    OnExitBootServicesFailed,
                    NULL,
                    &gEventExitBootServicesFailedGuid,
                    &Event
                    );

    //
    // Create event callback, because we need access variable on SecureBootPolicyVariable
    // We should use VariableWriteArch instead of VariableArch, because Variable driver
    // may update SecureBoot value based on last setting.
    //
    EfiCreateProtocolNotifyEvent (&gEfiVariableWriteArchProtocolGuid, TPL_CALLBACK, MeasureSecureBootPolicy, NULL, &Registration);

    //
    // Hook the system reset to properly shutdown TPM.
    //
    EfiCreateProtocolNotifyEvent (&gEfiResetNotificationProtocolGuid, TPL_CALLBACK, OnResetNotificationInstall, NULL, &Registration);
  }

  //
  // Install Tcg2Protocol
  //
  Status = InstallTcg2 ();
  DEBUG ((DEBUG_INFO, "InstallTcg2 - %r\n", Status));

  return Status;
}