summaryrefslogtreecommitdiffstats
path: root/arch/x86/Kconfig
blob: 9332badb48ea0dc13166f35eda41fe55c15ced72 (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
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
# SPDX-License-Identifier: GPL-2.0
# Select 32 or 64 bit
config 64BIT
	bool "64-bit kernel" if "$(ARCH)" = "x86"
	default "$(ARCH)" != "i386"
	help
	  Say yes to build a 64-bit kernel - formerly known as x86_64
	  Say no to build a 32-bit kernel - formerly known as i386

config X86_32
	def_bool y
	depends on !64BIT
	# Options that are inherently 32-bit kernel only:
	select ARCH_WANT_IPC_PARSE_VERSION
	select CLKSRC_I8253
	select CLONE_BACKWARDS
	select GENERIC_VDSO_32
	select HAVE_DEBUG_STACKOVERFLOW
	select KMAP_LOCAL
	select MODULES_USE_ELF_REL
	select OLD_SIGACTION
	select ARCH_SPLIT_ARG64

config X86_64
	def_bool y
	depends on 64BIT
	# Options that are inherently 64-bit kernel only:
	select ARCH_HAS_GIGANTIC_PAGE
	select ARCH_SUPPORTS_INT128 if CC_HAS_INT128
	select ARCH_SUPPORTS_PER_VMA_LOCK
	select HAVE_ARCH_SOFT_DIRTY
	select MODULES_USE_ELF_RELA
	select NEED_DMA_MAP_STATE
	select SWIOTLB
	select ARCH_HAS_ELFCORE_COMPAT
	select ZONE_DMA32

config FORCE_DYNAMIC_FTRACE
	def_bool y
	depends on X86_32
	depends on FUNCTION_TRACER
	select DYNAMIC_FTRACE
	help
	  We keep the static function tracing (!DYNAMIC_FTRACE) around
	  in order to test the non static function tracing in the
	  generic code, as other architectures still use it. But we
	  only need to keep it around for x86_64. No need to keep it
	  for x86_32. For x86_32, force DYNAMIC_FTRACE.
#
# Arch settings
#
# ( Note that options that are marked 'if X86_64' could in principle be
#   ported to 32-bit as well. )
#
config X86
	def_bool y
	#
	# Note: keep this list sorted alphabetically
	#
	select ACPI_LEGACY_TABLES_LOOKUP	if ACPI
	select ACPI_SYSTEM_POWER_STATES_SUPPORT	if ACPI
	select ACPI_HOTPLUG_CPU			if ACPI_PROCESSOR && HOTPLUG_CPU
	select ARCH_32BIT_OFF_T			if X86_32
	select ARCH_CLOCKSOURCE_INIT
	select ARCH_CORRECT_STACKTRACE_ON_KRETPROBE
	select ARCH_ENABLE_HUGEPAGE_MIGRATION if X86_64 && HUGETLB_PAGE && MIGRATION
	select ARCH_ENABLE_MEMORY_HOTPLUG if X86_64
	select ARCH_ENABLE_MEMORY_HOTREMOVE if MEMORY_HOTPLUG
	select ARCH_ENABLE_SPLIT_PMD_PTLOCK if (PGTABLE_LEVELS > 2) && (X86_64 || X86_PAE)
	select ARCH_ENABLE_THP_MIGRATION if X86_64 && TRANSPARENT_HUGEPAGE
	select ARCH_HAS_ACPI_TABLE_UPGRADE	if ACPI
	select ARCH_HAS_CACHE_LINE_SIZE
	select ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION
	select ARCH_HAS_CPU_FINALIZE_INIT
	select ARCH_HAS_CPU_PASID		if IOMMU_SVA
	select ARCH_HAS_CURRENT_STACK_POINTER
	select ARCH_HAS_DEBUG_VIRTUAL
	select ARCH_HAS_DEBUG_VM_PGTABLE	if !X86_PAE
	select ARCH_HAS_DEVMEM_IS_ALLOWED
	select ARCH_HAS_EARLY_DEBUG		if KGDB
	select ARCH_HAS_ELF_RANDOMIZE
	select ARCH_HAS_FAST_MULTIPLIER
	select ARCH_HAS_FORTIFY_SOURCE
	select ARCH_HAS_GCOV_PROFILE_ALL
	select ARCH_HAS_KCOV			if X86_64
	select ARCH_HAS_MEM_ENCRYPT
	select ARCH_HAS_MEMBARRIER_SYNC_CORE
	select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
	select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
	select ARCH_HAS_PMEM_API		if X86_64
	select ARCH_HAS_PTE_DEVMAP		if X86_64
	select ARCH_HAS_PTE_SPECIAL
	select ARCH_HAS_HW_PTE_YOUNG
	select ARCH_HAS_NONLEAF_PMD_YOUNG	if PGTABLE_LEVELS > 2
	select ARCH_HAS_UACCESS_FLUSHCACHE	if X86_64
	select ARCH_HAS_COPY_MC			if X86_64
	select ARCH_HAS_SET_MEMORY
	select ARCH_HAS_SET_DIRECT_MAP
	select ARCH_HAS_STRICT_KERNEL_RWX
	select ARCH_HAS_STRICT_MODULE_RWX
	select ARCH_HAS_SYNC_CORE_BEFORE_USERMODE
	select ARCH_HAS_SYSCALL_WRAPPER
	select ARCH_HAS_UBSAN
	select ARCH_HAS_DEBUG_WX
	select ARCH_HAS_ZONE_DMA_SET if EXPERT
	select ARCH_HAVE_NMI_SAFE_CMPXCHG
	select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE
	select ARCH_MIGHT_HAVE_ACPI_PDC		if ACPI
	select ARCH_MIGHT_HAVE_PC_PARPORT
	select ARCH_MIGHT_HAVE_PC_SERIO
	select ARCH_STACKWALK
	select ARCH_SUPPORTS_ACPI
	select ARCH_SUPPORTS_ATOMIC_RMW
	select ARCH_SUPPORTS_DEBUG_PAGEALLOC
	select ARCH_SUPPORTS_PAGE_TABLE_CHECK	if X86_64
	select ARCH_SUPPORTS_NUMA_BALANCING	if X86_64
	select ARCH_SUPPORTS_KMAP_LOCAL_FORCE_MAP	if NR_CPUS <= 4096
	select ARCH_SUPPORTS_CFI_CLANG		if X86_64
	select ARCH_USES_CFI_TRAPS		if X86_64 && CFI_CLANG
	select ARCH_SUPPORTS_LTO_CLANG
	select ARCH_SUPPORTS_LTO_CLANG_THIN
	select ARCH_USE_BUILTIN_BSWAP
	select ARCH_USE_CMPXCHG_LOCKREF		if X86_CMPXCHG64
	select ARCH_USE_MEMTEST
	select ARCH_USE_QUEUED_RWLOCKS
	select ARCH_USE_QUEUED_SPINLOCKS
	select ARCH_USE_SYM_ANNOTATIONS
	select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
	select ARCH_WANT_DEFAULT_BPF_JIT	if X86_64
	select ARCH_WANTS_DYNAMIC_TASK_STRUCT
	select ARCH_WANTS_NO_INSTR
	select ARCH_WANT_GENERAL_HUGETLB
	select ARCH_WANT_HUGE_PMD_SHARE
	select ARCH_WANT_LD_ORPHAN_WARN
	select ARCH_WANT_OPTIMIZE_DAX_VMEMMAP	if X86_64
	select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP	if X86_64
	select ARCH_WANTS_THP_SWAP		if X86_64
	select ARCH_HAS_PARANOID_L1D_FLUSH
	select BUILDTIME_TABLE_SORT
	select CLKEVT_I8253
	select CLOCKSOURCE_VALIDATE_LAST_CYCLE
	select CLOCKSOURCE_WATCHDOG
	# Word-size accesses may read uninitialized data past the trailing \0
	# in strings and cause false KMSAN reports.
	select DCACHE_WORD_ACCESS		if !KMSAN
	select DYNAMIC_SIGFRAME
	select EDAC_ATOMIC_SCRUB
	select EDAC_SUPPORT
	select GENERIC_CLOCKEVENTS_BROADCAST	if X86_64 || (X86_32 && X86_LOCAL_APIC)
	select GENERIC_CLOCKEVENTS_BROADCAST_IDLE	if GENERIC_CLOCKEVENTS_BROADCAST
	select GENERIC_CLOCKEVENTS_MIN_ADJUST
	select GENERIC_CMOS_UPDATE
	select GENERIC_CPU_AUTOPROBE
	select GENERIC_CPU_DEVICES
	select GENERIC_CPU_VULNERABILITIES
	select GENERIC_EARLY_IOREMAP
	select GENERIC_ENTRY
	select GENERIC_IOMAP
	select GENERIC_IRQ_EFFECTIVE_AFF_MASK	if SMP
	select GENERIC_IRQ_MATRIX_ALLOCATOR	if X86_LOCAL_APIC
	select GENERIC_IRQ_MIGRATION		if SMP
	select GENERIC_IRQ_PROBE
	select GENERIC_IRQ_RESERVATION_MODE
	select GENERIC_IRQ_SHOW
	select GENERIC_PENDING_IRQ		if SMP
	select GENERIC_PTDUMP
	select GENERIC_SMP_IDLE_THREAD
	select GENERIC_TIME_VSYSCALL
	select GENERIC_GETTIMEOFDAY
	select GENERIC_VDSO_TIME_NS
	select GUP_GET_PXX_LOW_HIGH		if X86_PAE
	select HARDIRQS_SW_RESEND
	select HARDLOCKUP_CHECK_TIMESTAMP	if X86_64
	select HAS_IOPORT
	select HAVE_ACPI_APEI			if ACPI
	select HAVE_ACPI_APEI_NMI		if ACPI
	select HAVE_ALIGNED_STRUCT_PAGE
	select HAVE_ARCH_AUDITSYSCALL
	select HAVE_ARCH_HUGE_VMAP		if X86_64 || X86_PAE
	select HAVE_ARCH_HUGE_VMALLOC		if X86_64
	select HAVE_ARCH_JUMP_LABEL
	select HAVE_ARCH_JUMP_LABEL_RELATIVE
	select HAVE_ARCH_KASAN			if X86_64
	select HAVE_ARCH_KASAN_VMALLOC		if X86_64
	select HAVE_ARCH_KFENCE
	select HAVE_ARCH_KMSAN			if X86_64
	select HAVE_ARCH_KGDB
	select HAVE_ARCH_MMAP_RND_BITS		if MMU
	select HAVE_ARCH_MMAP_RND_COMPAT_BITS	if MMU && COMPAT
	select HAVE_ARCH_COMPAT_MMAP_BASES	if MMU && COMPAT
	select HAVE_ARCH_PREL32_RELOCATIONS
	select HAVE_ARCH_SECCOMP_FILTER
	select HAVE_ARCH_THREAD_STRUCT_WHITELIST
	select HAVE_ARCH_STACKLEAK
	select HAVE_ARCH_TRACEHOOK
	select HAVE_ARCH_TRANSPARENT_HUGEPAGE
	select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD if X86_64
	select HAVE_ARCH_USERFAULTFD_WP         if X86_64 && USERFAULTFD
	select HAVE_ARCH_USERFAULTFD_MINOR	if X86_64 && USERFAULTFD
	select HAVE_ARCH_VMAP_STACK		if X86_64
	select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
	select HAVE_ARCH_WITHIN_STACK_FRAMES
	select HAVE_ASM_MODVERSIONS
	select HAVE_CMPXCHG_DOUBLE
	select HAVE_CMPXCHG_LOCAL
	select HAVE_CONTEXT_TRACKING_USER		if X86_64
	select HAVE_CONTEXT_TRACKING_USER_OFFSTACK	if HAVE_CONTEXT_TRACKING_USER
	select HAVE_C_RECORDMCOUNT
	select HAVE_OBJTOOL_MCOUNT		if HAVE_OBJTOOL
	select HAVE_OBJTOOL_NOP_MCOUNT		if HAVE_OBJTOOL_MCOUNT
	select HAVE_BUILDTIME_MCOUNT_SORT
	select HAVE_DEBUG_KMEMLEAK
	select HAVE_DMA_CONTIGUOUS
	select HAVE_DYNAMIC_FTRACE
	select HAVE_DYNAMIC_FTRACE_WITH_REGS
	select HAVE_DYNAMIC_FTRACE_WITH_ARGS	if X86_64
	select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
	select HAVE_SAMPLE_FTRACE_DIRECT	if X86_64
	select HAVE_SAMPLE_FTRACE_DIRECT_MULTI	if X86_64
	select HAVE_EBPF_JIT
	select HAVE_EFFICIENT_UNALIGNED_ACCESS
	select HAVE_EISA
	select HAVE_EXIT_THREAD
	select HAVE_FAST_GUP
	select HAVE_FENTRY			if X86_64 || DYNAMIC_FTRACE
	select HAVE_FTRACE_MCOUNT_RECORD
	select HAVE_FUNCTION_GRAPH_RETVAL	if HAVE_FUNCTION_GRAPH_TRACER
	select HAVE_FUNCTION_GRAPH_TRACER	if X86_32 || (X86_64 && DYNAMIC_FTRACE)
	select HAVE_FUNCTION_TRACER
	select HAVE_GCC_PLUGINS
	select HAVE_HW_BREAKPOINT
	select HAVE_IOREMAP_PROT
	select HAVE_IRQ_EXIT_ON_IRQ_STACK	if X86_64
	select HAVE_IRQ_TIME_ACCOUNTING
	select HAVE_JUMP_LABEL_HACK		if HAVE_OBJTOOL
	select HAVE_KERNEL_BZIP2
	select HAVE_KERNEL_GZIP
	select HAVE_KERNEL_LZ4
	select HAVE_KERNEL_LZMA
	select HAVE_KERNEL_LZO
	select HAVE_KERNEL_XZ
	select HAVE_KERNEL_ZSTD
	select HAVE_KPROBES
	select HAVE_KPROBES_ON_FTRACE
	select HAVE_FUNCTION_ERROR_INJECTION
	select HAVE_KRETPROBES
	select HAVE_RETHOOK
	select HAVE_LIVEPATCH			if X86_64
	select HAVE_MIXED_BREAKPOINTS_REGS
	select HAVE_MOD_ARCH_SPECIFIC
	select HAVE_MOVE_PMD
	select HAVE_MOVE_PUD
	select HAVE_NOINSTR_HACK		if HAVE_OBJTOOL
	select HAVE_NMI
	select HAVE_NOINSTR_VALIDATION		if HAVE_OBJTOOL
	select HAVE_OBJTOOL			if X86_64
	select HAVE_OPTPROBES
	select HAVE_PAGE_SIZE_4KB
	select HAVE_PCSPKR_PLATFORM
	select HAVE_PERF_EVENTS
	select HAVE_PERF_EVENTS_NMI
	select HAVE_HARDLOCKUP_DETECTOR_PERF	if PERF_EVENTS && HAVE_PERF_EVENTS_NMI
	select HAVE_PCI
	select HAVE_PERF_REGS
	select HAVE_PERF_USER_STACK_DUMP
	select MMU_GATHER_RCU_TABLE_FREE	if PARAVIRT
	select MMU_GATHER_MERGE_VMAS
	select HAVE_POSIX_CPU_TIMERS_TASK_WORK
	select HAVE_REGS_AND_STACK_ACCESS_API
	select HAVE_RELIABLE_STACKTRACE		if UNWINDER_ORC || STACK_VALIDATION
	select HAVE_FUNCTION_ARG_ACCESS_API
	select HAVE_SETUP_PER_CPU_AREA
	select HAVE_SOFTIRQ_ON_OWN_STACK
	select HAVE_STACKPROTECTOR		if CC_HAS_SANE_STACKPROTECTOR
	select HAVE_STACK_VALIDATION		if HAVE_OBJTOOL
	select HAVE_STATIC_CALL
	select HAVE_STATIC_CALL_INLINE		if HAVE_OBJTOOL
	select HAVE_PREEMPT_DYNAMIC_CALL
	select HAVE_RSEQ
	select HAVE_RUST			if X86_64
	select HAVE_SYSCALL_TRACEPOINTS
	select HAVE_UACCESS_VALIDATION		if HAVE_OBJTOOL
	select HAVE_UNSTABLE_SCHED_CLOCK
	select HAVE_USER_RETURN_NOTIFIER
	select HAVE_GENERIC_VDSO
	select HOTPLUG_PARALLEL			if SMP && X86_64
	select HOTPLUG_SMT			if SMP
	select HOTPLUG_SPLIT_STARTUP		if SMP && X86_32
	select IRQ_FORCED_THREADING
	select LOCK_MM_AND_FIND_VMA
	select NEED_PER_CPU_EMBED_FIRST_CHUNK
	select NEED_PER_CPU_PAGE_FIRST_CHUNK
	select NEED_SG_DMA_LENGTH
	select PCI_DOMAINS			if PCI
	select PCI_LOCKLESS_CONFIG		if PCI
	select PERF_EVENTS
	select RTC_LIB
	select RTC_MC146818_LIB
	select SPARSE_IRQ
	select SYSCTL_EXCEPTION_TRACE
	select THREAD_INFO_IN_TASK
	select TRACE_IRQFLAGS_SUPPORT
	select TRACE_IRQFLAGS_NMI_SUPPORT
	select USER_STACKTRACE_SUPPORT
	select HAVE_ARCH_KCSAN			if X86_64
	select PROC_PID_ARCH_STATUS		if PROC_FS
	select HAVE_ARCH_NODE_DEV_GROUP		if X86_SGX
	select FUNCTION_ALIGNMENT_16B		if X86_64 || X86_ALIGNMENT_16
	select FUNCTION_ALIGNMENT_4B
	imply IMA_SECURE_AND_OR_TRUSTED_BOOT    if EFI
	select HAVE_DYNAMIC_FTRACE_NO_PATCHABLE

config INSTRUCTION_DECODER
	def_bool y
	depends on KPROBES || PERF_EVENTS || UPROBES

config OUTPUT_FORMAT
	string
	default "elf32-i386" if X86_32
	default "elf64-x86-64" if X86_64

config LOCKDEP_SUPPORT
	def_bool y

config STACKTRACE_SUPPORT
	def_bool y

config MMU
	def_bool y

config ARCH_MMAP_RND_BITS_MIN
	default 28 if 64BIT
	default 8

config ARCH_MMAP_RND_BITS_MAX
	default 32 if 64BIT
	default 16

config ARCH_MMAP_RND_COMPAT_BITS_MIN
	default 8

config ARCH_MMAP_RND_COMPAT_BITS_MAX
	default 16

config SBUS
	bool

config GENERIC_ISA_DMA
	def_bool y
	depends on ISA_DMA_API

config GENERIC_CSUM
	bool
	default y if KMSAN || KASAN

config GENERIC_BUG
	def_bool y
	depends on BUG
	select GENERIC_BUG_RELATIVE_POINTERS if X86_64

config GENERIC_BUG_RELATIVE_POINTERS
	bool

config ARCH_MAY_HAVE_PC_FDC
	def_bool y
	depends on ISA_DMA_API

config GENERIC_CALIBRATE_DELAY
	def_bool y

config ARCH_HAS_CPU_RELAX
	def_bool y

config ARCH_HIBERNATION_POSSIBLE
	def_bool y

config ARCH_SUSPEND_POSSIBLE
	def_bool y

config AUDIT_ARCH
	def_bool y if X86_64

config KASAN_SHADOW_OFFSET
	hex
	depends on KASAN
	default 0xdffffc0000000000

config HAVE_INTEL_TXT
	def_bool y
	depends on INTEL_IOMMU && ACPI

config X86_64_SMP
	def_bool y
	depends on X86_64 && SMP

config ARCH_SUPPORTS_UPROBES
	def_bool y

config FIX_EARLYCON_MEM
	def_bool y

config DYNAMIC_PHYSICAL_MASK
	bool

config PGTABLE_LEVELS
	int
	default 5 if X86_5LEVEL
	default 4 if X86_64
	default 3 if X86_PAE
	default 2

config CC_HAS_SANE_STACKPROTECTOR
	bool
	default $(success,$(srctree)/scripts/gcc-x86_64-has-stack-protector.sh $(CC) $(CLANG_FLAGS)) if 64BIT
	default $(success,$(srctree)/scripts/gcc-x86_32-has-stack-protector.sh $(CC) $(CLANG_FLAGS))
	help
	  We have to make sure stack protector is unconditionally disabled if
	  the compiler produces broken code or if it does not let us control
	  the segment on 32-bit kernels.

menu "Processor type and features"

config SMP
	bool "Symmetric multi-processing support"
	help
	  This enables support for systems with more than one CPU. If you have
	  a system with only one CPU, say N. If you have a system with more
	  than one CPU, say Y.

	  If you say N here, the kernel will run on uni- and multiprocessor
	  machines, but will use only one CPU of a multiprocessor machine. If
	  you say Y here, the kernel will run on many, but not all,
	  uniprocessor machines. On a uniprocessor machine, the kernel
	  will run faster if you say N here.

	  Note that if you say Y here and choose architecture "586" or
	  "Pentium" under "Processor family", the kernel will not work on 486
	  architectures. Similarly, multiprocessor kernels for the "PPro"
	  architecture may not work on all Pentium based boards.

	  People using multiprocessor machines who say Y here should also say
	  Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
	  Management" code will be disabled if you say Y here.

	  See also <file:Documentation/arch/x86/i386/IO-APIC.rst>,
	  <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO available at
	  <http://www.tldp.org/docs.html#howto>.

	  If you don't know what to do here, say N.

config X86_X2APIC
	bool "Support x2apic"
	depends on X86_LOCAL_APIC && X86_64 && (IRQ_REMAP || HYPERVISOR_GUEST)
	help
	  This enables x2apic support on CPUs that have this feature.

	  This allows 32-bit apic IDs (so it can support very large systems),
	  and accesses the local apic via MSRs not via mmio.

	  Some Intel systems circa 2022 and later are locked into x2APIC mode
	  and can not fall back to the legacy APIC modes if SGX or TDX are
	  enabled in the BIOS. They will boot with very reduced functionality
	  without enabling this option.

	  If you don't know what to do here, say N.

config X86_MPPARSE
	bool "Enable MPS table" if ACPI
	default y
	depends on X86_LOCAL_APIC
	help
	  For old smp systems that do not have proper acpi support. Newer systems
	  (esp with 64bit cpus) with acpi support, MADT and DSDT will override it

config X86_CPU_RESCTRL
	bool "x86 CPU resource control support"
	depends on X86 && (CPU_SUP_INTEL || CPU_SUP_AMD)
	select KERNFS
	select PROC_CPU_RESCTRL		if PROC_FS
	help
	  Enable x86 CPU resource control support.

	  Provide support for the allocation and monitoring of system resources
	  usage by the CPU.

	  Intel calls this Intel Resource Director Technology
	  (Intel(R) RDT). More information about RDT can be found in the
	  Intel x86 Architecture Software Developer Manual.

	  AMD calls this AMD Platform Quality of Service (AMD QoS).
	  More information about AMD QoS can be found in the AMD64 Technology
	  Platform Quality of Service Extensions manual.

	  Say N if unsure.

config X86_FRED
	bool "Flexible Return and Event Delivery"
	depends on X86_64
	help
	  When enabled, try to use Flexible Return and Event Delivery
	  instead of the legacy SYSCALL/SYSENTER/IDT architecture for
	  ring transitions and exception/interrupt handling if the
	  system supports.

if X86_32
config X86_BIGSMP
	bool "Support for big SMP systems with more than 8 CPUs"
	depends on SMP
	help
	  This option is needed for the systems that have more than 8 CPUs.

config X86_EXTENDED_PLATFORM
	bool "Support for extended (non-PC) x86 platforms"
	default y
	help
	  If you disable this option then the kernel will only support
	  standard PC platforms. (which covers the vast majority of
	  systems out there.)

	  If you enable this option then you'll be able to select support
	  for the following (non-PC) 32 bit x86 platforms:
		Goldfish (Android emulator)
		AMD Elan
		RDC R-321x SoC
		SGI 320/540 (Visual Workstation)
		STA2X11-based (e.g. Northville)
		Moorestown MID devices

	  If you have one of these systems, or if you want to build a
	  generic distribution kernel, say Y here - otherwise say N.
endif # X86_32

if X86_64
config X86_EXTENDED_PLATFORM
	bool "Support for extended (non-PC) x86 platforms"
	default y
	help
	  If you disable this option then the kernel will only support
	  standard PC platforms. (which covers the vast majority of
	  systems out there.)

	  If you enable this option then you'll be able to select support
	  for the following (non-PC) 64 bit x86 platforms:
		Numascale NumaChip
		ScaleMP vSMP
		SGI Ultraviolet

	  If you have one of these systems, or if you want to build a
	  generic distribution kernel, say Y here - otherwise say N.
endif # X86_64
# This is an alphabetically sorted list of 64 bit extended platforms
# Please maintain the alphabetic order if and when there are additions
config X86_NUMACHIP
	bool "Numascale NumaChip"
	depends on X86_64
	depends on X86_EXTENDED_PLATFORM
	depends on NUMA
	depends on SMP
	depends on X86_X2APIC
	depends on PCI_MMCONFIG
	help
	  Adds support for Numascale NumaChip large-SMP systems. Needed to
	  enable more than ~168 cores.
	  If you don't have one of these, you should say N here.

config X86_VSMP
	bool "ScaleMP vSMP"
	select HYPERVISOR_GUEST
	select PARAVIRT
	depends on X86_64 && PCI
	depends on X86_EXTENDED_PLATFORM
	depends on SMP
	help
	  Support for ScaleMP vSMP systems.  Say 'Y' here if this kernel is
	  supposed to run on these EM64T-based machines.  Only choose this option
	  if you have one of these machines.

config X86_UV
	bool "SGI Ultraviolet"
	depends on X86_64
	depends on X86_EXTENDED_PLATFORM
	depends on NUMA
	depends on EFI
	depends on KEXEC_CORE
	depends on X86_X2APIC
	depends on PCI
	help
	  This option is needed in order to support SGI Ultraviolet systems.
	  If you don't have one of these, you should say N here.

# Following is an alphabetically sorted list of 32 bit extended platforms
# Please maintain the alphabetic order if and when there are additions

config X86_GOLDFISH
	bool "Goldfish (Virtual Platform)"
	depends on X86_EXTENDED_PLATFORM
	help
	  Enable support for the Goldfish virtual platform used primarily
	  for Android development. Unless you are building for the Android
	  Goldfish emulator say N here.

config X86_INTEL_CE
	bool "CE4100 TV platform"
	depends on PCI
	depends on PCI_GODIRECT
	depends on X86_IO_APIC
	depends on X86_32
	depends on X86_EXTENDED_PLATFORM
	select X86_REBOOTFIXUPS
	select OF
	select OF_EARLY_FLATTREE
	help
	  Select for the Intel CE media processor (CE4100) SOC.
	  This option compiles in support for the CE4100 SOC for settop
	  boxes and media devices.

config X86_INTEL_MID
	bool "Intel MID platform support"
	depends on X86_EXTENDED_PLATFORM
	depends on X86_PLATFORM_DEVICES
	depends on PCI
	depends on X86_64 || (PCI_GOANY && X86_32)
	depends on X86_IO_APIC
	select I2C
	select DW_APB_TIMER
	select INTEL_SCU_PCI
	help
	  Select to build a kernel capable of supporting Intel MID (Mobile
	  Internet Device) platform systems which do not have the PCI legacy
	  interfaces. If you are building for a PC class system say N here.

	  Intel MID platforms are based on an Intel processor and chipset which
	  consume less power than most of the x86 derivatives.

config X86_INTEL_QUARK
	bool "Intel Quark platform support"
	depends on X86_32
	depends on X86_EXTENDED_PLATFORM
	depends on X86_PLATFORM_DEVICES
	depends on X86_TSC
	depends on PCI
	depends on PCI_GOANY
	depends on X86_IO_APIC
	select IOSF_MBI
	select INTEL_IMR
	select COMMON_CLK
	help
	  Select to include support for Quark X1000 SoC.
	  Say Y here if you have a Quark based system such as the Arduino
	  compatible Intel Galileo.

config X86_INTEL_LPSS
	bool "Intel Low Power Subsystem Support"
	depends on X86 && ACPI && PCI
	select COMMON_CLK
	select PINCTRL
	select IOSF_MBI
	help
	  Select to build support for Intel Low Power Subsystem such as
	  found on Intel Lynxpoint PCH. Selecting this option enables
	  things like clock tree (common clock framework) and pincontrol
	  which are needed by the LPSS peripheral drivers.

config X86_AMD_PLATFORM_DEVICE
	bool "AMD ACPI2Platform devices support"
	depends on ACPI
	select COMMON_CLK
	select PINCTRL
	help
	  Select to interpret AMD specific ACPI device to platform device
	  such as I2C, UART, GPIO found on AMD Carrizo and later chipsets.
	  I2C and UART depend on COMMON_CLK to set clock. GPIO driver is
	  implemented under PINCTRL subsystem.

config IOSF_MBI
	tristate "Intel SoC IOSF Sideband support for SoC platforms"
	depends on PCI
	help
	  This option enables sideband register access support for Intel SoC
	  platforms. On these platforms the IOSF sideband is used in lieu of
	  MSR's for some register accesses, mostly but not limited to thermal
	  and power. Drivers may query the availability of this device to
	  determine if they need the sideband in order to work on these
	  platforms. The sideband is available on the following SoC products.
	  This list is not meant to be exclusive.
	   - BayTrail
	   - Braswell
	   - Quark

	  You should say Y if you are running a kernel on one of these SoC's.

config IOSF_MBI_DEBUG
	bool "Enable IOSF sideband access through debugfs"
	depends on IOSF_MBI && DEBUG_FS
	help
	  Select this option to expose the IOSF sideband access registers (MCR,
	  MDR, MCRX) through debugfs to write and read register information from
	  different units on the SoC. This is most useful for obtaining device
	  state information for debug and analysis. As this is a general access
	  mechanism, users of this option would have specific knowledge of the
	  device they want to access.

	  If you don't require the option or are in doubt, say N.

config X86_RDC321X
	bool "RDC R-321x SoC"
	depends on X86_32
	depends on X86_EXTENDED_PLATFORM
	select M486
	select X86_REBOOTFIXUPS
	help
	  This option is needed for RDC R-321x system-on-chip, also known
	  as R-8610-(G).
	  If you don't have one of these chips, you should say N here.

config X86_32_NON_STANDARD
	bool "Support non-standard 32-bit SMP architectures"
	depends on X86_32 && SMP
	depends on X86_EXTENDED_PLATFORM
	help
	  This option compiles in the bigsmp and STA2X11 default
	  subarchitectures.  It is intended for a generic binary
	  kernel. If you select them all, kernel will probe it one by
	  one and will fallback to default.

# Alphabetically sorted list of Non standard 32 bit platforms

config X86_SUPPORTS_MEMORY_FAILURE
	def_bool y
	# MCE code calls memory_failure():
	depends on X86_MCE
	# On 32-bit this adds too big of NODES_SHIFT and we run out of page flags:
	# On 32-bit SPARSEMEM adds too big of SECTIONS_WIDTH:
	depends on X86_64 || !SPARSEMEM
	select ARCH_SUPPORTS_MEMORY_FAILURE

config STA2X11
	bool "STA2X11 Companion Chip Support"
	depends on X86_32_NON_STANDARD && PCI
	select SWIOTLB
	select MFD_STA2X11
	select GPIOLIB
	help
	  This adds support for boards based on the STA2X11 IO-Hub,
	  a.k.a. "ConneXt". The chip is used in place of the standard
	  PC chipset, so all "standard" peripherals are missing. If this
	  option is selected the kernel will still be able to boot on
	  standard PC machines.

config X86_32_IRIS
	tristate "Eurobraille/Iris poweroff module"
	depends on X86_32
	help
	  The Iris machines from EuroBraille do not have APM or ACPI support
	  to shut themselves down properly.  A special I/O sequence is
	  needed to do so, which is what this module does at
	  kernel shutdown.

	  This is only for Iris machines from EuroBraille.

	  If unused, say N.

config SCHED_OMIT_FRAME_POINTER
	def_bool y
	prompt "Single-depth WCHAN output"
	depends on X86
	help
	  Calculate simpler /proc/<PID>/wchan values. If this option
	  is disabled then wchan values will recurse back to the
	  caller function. This provides more accurate wchan values,
	  at the expense of slightly more scheduling overhead.

	  If in doubt, say "Y".

menuconfig HYPERVISOR_GUEST
	bool "Linux guest support"
	help
	  Say Y here to enable options for running Linux under various hyper-
	  visors. This option enables basic hypervisor detection and platform
	  setup.

	  If you say N, all options in this submenu will be skipped and
	  disabled, and Linux guest support won't be built in.

if HYPERVISOR_GUEST

config PARAVIRT
	bool "Enable paravirtualization code"
	depends on HAVE_STATIC_CALL
	help
	  This changes the kernel so it can modify itself when it is run
	  under a hypervisor, potentially improving performance significantly
	  over full virtualization.  However, when run without a hypervisor
	  the kernel is theoretically slower and slightly larger.

config PARAVIRT_XXL
	bool

config PARAVIRT_DEBUG
	bool "paravirt-ops debugging"
	depends on PARAVIRT && DEBUG_KERNEL
	help
	  Enable to debug paravirt_ops internals.  Specifically, BUG if
	  a paravirt_op is missing when it is called.

config PARAVIRT_SPINLOCKS
	bool "Paravirtualization layer for spinlocks"
	depends on PARAVIRT && SMP
	help
	  Paravirtualized spinlocks allow a pvops backend to replace the
	  spinlock implementation with something virtualization-friendly
	  (for example, block the virtual CPU rather than spinning).

	  It has a minimal impact on native kernels and gives a nice performance
	  benefit on paravirtualized KVM / Xen kernels.

	  If you are unsure how to answer this question, answer Y.

config X86_HV_CALLBACK_VECTOR
	def_bool n

source "arch/x86/xen/Kconfig"

config KVM_GUEST
	bool "KVM Guest support (including kvmclock)"
	depends on PARAVIRT
	select PARAVIRT_CLOCK
	select ARCH_CPUIDLE_HALTPOLL
	select X86_HV_CALLBACK_VECTOR
	default y
	help
	  This option enables various optimizations for running under the KVM
	  hypervisor. It includes a paravirtualized clock, so that instead
	  of relying on a PIT (or probably other) emulation by the
	  underlying device model, the host provides the guest with
	  timing infrastructure such as time of day, and system time

config ARCH_CPUIDLE_HALTPOLL
	def_bool n
	prompt "Disable host haltpoll when loading haltpoll driver"
	help
	  If virtualized under KVM, disable host haltpoll.

config PVH
	bool "Support for running PVH guests"
	help
	  This option enables the PVH entry point for guest virtual machines
	  as specified in the x86/HVM direct boot ABI.

config PARAVIRT_TIME_ACCOUNTING
	bool "Paravirtual steal time accounting"
	depends on PARAVIRT
	help
	  Select this option to enable fine granularity task steal time
	  accounting. Time spent executing other tasks in parallel with
	  the current vCPU is discounted from the vCPU power. To account for
	  that, there can be a small performance impact.

	  If in doubt, say N here.

config PARAVIRT_CLOCK
	bool

config JAILHOUSE_GUEST
	bool "Jailhouse non-root cell support"
	depends on X86_64 && PCI
	select X86_PM_TIMER
	help
	  This option allows to run Linux as guest in a Jailhouse non-root
	  cell. You can leave this option disabled if you only want to start
	  Jailhouse and run Linux afterwards in the root cell.

config ACRN_GUEST
	bool "ACRN Guest support"
	depends on X86_64
	select X86_HV_CALLBACK_VECTOR
	help
	  This option allows to run Linux as guest in the ACRN hypervisor. ACRN is
	  a flexible, lightweight reference open-source hypervisor, built with
	  real-time and safety-criticality in mind. It is built for embedded
	  IOT with small footprint and real-time features. More details can be
	  found in https://projectacrn.org/.

config INTEL_TDX_GUEST
	bool "Intel TDX (Trust Domain Extensions) - Guest Support"
	depends on X86_64 && CPU_SUP_INTEL
	depends on X86_X2APIC
	depends on EFI_STUB
	select ARCH_HAS_CC_PLATFORM
	select X86_MEM_ENCRYPT
	select X86_MCE
	select UNACCEPTED_MEMORY
	help
	  Support running as a guest under Intel TDX.  Without this support,
	  the guest kernel can not boot or run under TDX.
	  TDX includes memory encryption and integrity capabilities
	  which protect the confidentiality and integrity of guest
	  memory contents and CPU state. TDX guests are protected from
	  some attacks from the VMM.

endif # HYPERVISOR_GUEST

source "arch/x86/Kconfig.cpu"

config HPET_TIMER
	def_bool X86_64
	prompt "HPET Timer Support" if X86_32
	help
	  Use the IA-PC HPET (High Precision Event Timer) to manage
	  time in preference to the PIT and RTC, if a HPET is
	  present.
	  HPET is the next generation timer replacing legacy 8254s.
	  The HPET provides a stable time base on SMP
	  systems, unlike the TSC, but it is more expensive to access,
	  as it is off-chip.  The interface used is documented
	  in the HPET spec, revision 1.

	  You can safely choose Y here.  However, HPET will only be
	  activated if the platform and the BIOS support this feature.
	  Otherwise the 8254 will be used for timing services.

	  Choose N to continue using the legacy 8254 timer.

config HPET_EMULATE_RTC
	def_bool y
	depends on HPET_TIMER && (RTC_DRV_CMOS=m || RTC_DRV_CMOS=y)

# Mark as expert because too many people got it wrong.
# The code disables itself when not needed.
config DMI
	default y
	select DMI_SCAN_MACHINE_NON_EFI_FALLBACK
	bool "Enable DMI scanning" if EXPERT
	help
	  Enabled scanning of DMI to identify machine quirks. Say Y
	  here unless you have verified that your setup is not
	  affected by entries in the DMI blacklist. Required by PNP
	  BIOS code.

config GART_IOMMU
	bool "Old AMD GART IOMMU support"
	select DMA_OPS
	select IOMMU_HELPER
	select SWIOTLB
	depends on X86_64 && PCI && AMD_NB
	help
	  Provides a driver for older AMD Athlon64/Opteron/Turion/Sempron
	  GART based hardware IOMMUs.

	  The GART supports full DMA access for devices with 32-bit access
	  limitations, on systems with more than 3 GB. This is usually needed
	  for USB, sound, many IDE/SATA chipsets and some other devices.

	  Newer systems typically have a modern AMD IOMMU, supported via
	  the CONFIG_AMD_IOMMU=y config option.

	  In normal configurations this driver is only active when needed:
	  there's more than 3 GB of memory and the system contains a
	  32-bit limited device.

	  If unsure, say Y.

config BOOT_VESA_SUPPORT
	bool
	help
	  If true, at least one selected framebuffer driver can take advantage
	  of VESA video modes set at an early boot stage via the vga= parameter.

config MAXSMP
	bool "Enable Maximum number of SMP Processors and NUMA Nodes"
	depends on X86_64 && SMP && DEBUG_KERNEL
	select CPUMASK_OFFSTACK
	help
	  Enable maximum number of CPUS and NUMA Nodes for this architecture.
	  If unsure, say N.

#
# The maximum number of CPUs supported:
#
# The main config value is NR_CPUS, which defaults to NR_CPUS_DEFAULT,
# and which can be configured interactively in the
# [NR_CPUS_RANGE_BEGIN ... NR_CPUS_RANGE_END] range.
#
# The ranges are different on 32-bit and 64-bit kernels, depending on
# hardware capabilities and scalability features of the kernel.
#
# ( If MAXSMP is enabled we just use the highest possible value and disable
#   interactive configuration. )
#

config NR_CPUS_RANGE_BEGIN
	int
	default NR_CPUS_RANGE_END if MAXSMP
	default    1 if !SMP
	default    2

config NR_CPUS_RANGE_END
	int
	depends on X86_32
	default   64 if  SMP &&  X86_BIGSMP
	default    8 if  SMP && !X86_BIGSMP
	default    1 if !SMP

config NR_CPUS_RANGE_END
	int
	depends on X86_64
	default 8192 if  SMP && CPUMASK_OFFSTACK
	default  512 if  SMP && !CPUMASK_OFFSTACK
	default    1 if !SMP

config NR_CPUS_DEFAULT
	int
	depends on X86_32
	default   32 if  X86_BIGSMP
	default    8 if  SMP
	default    1 if !SMP

config NR_CPUS_DEFAULT
	int
	depends on X86_64
	default 8192 if  MAXSMP
	default   64 if  SMP
	default    1 if !SMP

config NR_CPUS
	int "Maximum number of CPUs" if SMP && !MAXSMP
	range NR_CPUS_RANGE_BEGIN NR_CPUS_RANGE_END
	default NR_CPUS_DEFAULT
	help
	  This allows you to specify the maximum number of CPUs which this
	  kernel will support.  If CPUMASK_OFFSTACK is enabled, the maximum
	  supported value is 8192, otherwise the maximum value is 512.  The
	  minimum value which makes sense is 2.

	  This is purely to save memory: each supported CPU adds about 8KB
	  to the kernel image.

config SCHED_CLUSTER
	bool "Cluster scheduler support"
	depends on SMP
	default y
	help
	  Cluster scheduler support improves the CPU scheduler's decision
	  making when dealing with machines that have clusters of CPUs.
	  Cluster usually means a couple of CPUs which are placed closely
	  by sharing mid-level caches, last-level cache tags or internal
	  busses.

config SCHED_SMT
	def_bool y if SMP

config SCHED_MC
	def_bool y
	prompt "Multi-core scheduler support"
	depends on SMP
	help
	  Multi-core scheduler support improves the CPU scheduler's decision
	  making when dealing with multi-core CPU chips at a cost of slightly
	  increased overhead in some places. If unsure say N here.

config SCHED_MC_PRIO
	bool "CPU core priorities scheduler support"
	depends on SCHED_MC
	select X86_INTEL_PSTATE if CPU_SUP_INTEL
	select X86_AMD_PSTATE if CPU_SUP_AMD && ACPI
	select CPU_FREQ
	default y
	help
	  Intel Turbo Boost Max Technology 3.0 enabled CPUs have a
	  core ordering determined at manufacturing time, which allows
	  certain cores to reach higher turbo frequencies (when running
	  single threaded workloads) than others.

	  Enabling this kernel feature teaches the scheduler about
	  the TBM3 (aka ITMT) priority order of the CPU cores and adjusts the
	  scheduler's CPU selection logic accordingly, so that higher
	  overall system performance can be achieved.

	  This feature will have no effect on CPUs without this feature.

	  If unsure say Y here.

config UP_LATE_INIT
	def_bool y
	depends on !SMP && X86_LOCAL_APIC

config X86_UP_APIC
	bool "Local APIC support on uniprocessors" if !PCI_MSI
	default PCI_MSI
	depends on X86_32 && !SMP && !X86_32_NON_STANDARD
	help
	  A local APIC (Advanced Programmable Interrupt Controller) is an
	  integrated interrupt controller in the CPU. If you have a single-CPU
	  system which has a processor with a local APIC, you can say Y here to
	  enable and use it. If you say Y here even though your machine doesn't
	  have a local APIC, then the kernel will still run with no slowdown at
	  all. The local APIC supports CPU-generated self-interrupts (timer,
	  performance counters), and the NMI watchdog which detects hard
	  lockups.

config X86_UP_IOAPIC
	bool "IO-APIC support on uniprocessors"
	depends on X86_UP_APIC
	help
	  An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
	  SMP-capable replacement for PC-style interrupt controllers. Most
	  SMP systems and many recent uniprocessor systems have one.

	  If you have a single-CPU system with an IO-APIC, you can say Y here
	  to use it. If you say Y here even though your machine doesn't have
	  an IO-APIC, then the kernel will still run with no slowdown at all.

config X86_LOCAL_APIC
	def_bool y
	depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC || PCI_MSI
	select IRQ_DOMAIN_HIERARCHY

config X86_IO_APIC
	def_bool y
	depends on X86_LOCAL_APIC || X86_UP_IOAPIC

config X86_REROUTE_FOR_BROKEN_BOOT_IRQS
	bool "Reroute for broken boot IRQs"
	depends on X86_IO_APIC
	help
	  This option enables a workaround that fixes a source of
	  spurious interrupts. This is recommended when threaded
	  interrupt handling is used on systems where the generation of
	  superfluous "boot interrupts" cannot be disabled.

	  Some chipsets generate a legacy INTx "boot IRQ" when the IRQ
	  entry in the chipset's IO-APIC is masked (as, e.g. the RT
	  kernel does during interrupt handling). On chipsets where this
	  boot IRQ generation cannot be disabled, this workaround keeps
	  the original IRQ line masked so that only the equivalent "boot
	  IRQ" is delivered to the CPUs. The workaround also tells the
	  kernel to set up the IRQ handler on the boot IRQ line. In this
	  way only one interrupt is delivered to the kernel. Otherwise
	  the spurious second interrupt may cause the kernel to bring
	  down (vital) interrupt lines.

	  Only affects "broken" chipsets. Interrupt sharing may be
	  increased on these systems.

config X86_MCE
	bool "Machine Check / overheating reporting"
	select GENERIC_ALLOCATOR
	default y
	help
	  Machine Check support allows the processor to notify the
	  kernel if it detects a problem (e.g. overheating, data corruption).
	  The action the kernel takes depends on the severity of the problem,
	  ranging from warning messages to halting the machine.

config X86_MCELOG_LEGACY
	bool "Support for deprecated /dev/mcelog character device"
	depends on X86_MCE
	help
	  Enable support for /dev/mcelog which is needed by the old mcelog
	  userspace logging daemon. Consider switching to the new generation
	  rasdaemon solution.

config X86_MCE_INTEL
	def_bool y
	prompt "Intel MCE features"
	depends on X86_MCE && X86_LOCAL_APIC
	help
	  Additional support for intel specific MCE features such as
	  the thermal monitor.

config X86_MCE_AMD
	def_bool y
	prompt "AMD MCE features"
	depends on X86_MCE && X86_LOCAL_APIC && AMD_NB
	help
	  Additional support for AMD specific MCE features such as
	  the DRAM Error Threshold.

config X86_ANCIENT_MCE
	bool "Support for old Pentium 5 / WinChip machine checks"
	depends on X86_32 && X86_MCE
	help
	  Include support for machine check handling on old Pentium 5 or WinChip
	  systems. These typically need to be enabled explicitly on the command
	  line.

config X86_MCE_THRESHOLD
	depends on X86_MCE_AMD || X86_MCE_INTEL
	def_bool y

config X86_MCE_INJECT
	depends on X86_MCE && X86_LOCAL_APIC && DEBUG_FS
	tristate "Machine check injector support"
	help
	  Provide support for injecting machine checks for testing purposes.
	  If you don't know what a machine check is and you don't do kernel
	  QA it is safe to say n.

source "arch/x86/events/Kconfig"

config X86_LEGACY_VM86
	bool "Legacy VM86 support"
	depends on X86_32
	help
	  This option allows user programs to put the CPU into V8086
	  mode, which is an 80286-era approximation of 16-bit real mode.

	  Some very old versions of X and/or vbetool require this option
	  for user mode setting.  Similarly, DOSEMU will use it if
	  available to accelerate real mode DOS programs.  However, any
	  recent version of DOSEMU, X, or vbetool should be fully
	  functional even without kernel VM86 support, as they will all
	  fall back to software emulation. Nevertheless, if you are using
	  a 16-bit DOS program where 16-bit performance matters, vm86
	  mode might be faster than emulation and you might want to
	  enable this option.

	  Note that any app that works on a 64-bit kernel is unlikely to
	  need this option, as 64-bit kernels don't, and can't, support
	  V8086 mode. This option is also unrelated to 16-bit protected
	  mode and is not needed to run most 16-bit programs under Wine.

	  Enabling this option increases the complexity of the kernel
	  and slows down exception handling a tiny bit.

	  If unsure, say N here.

config VM86
	bool
	default X86_LEGACY_VM86

config X86_16BIT
	bool "Enable support for 16-bit segments" if EXPERT
	default y
	depends on MODIFY_LDT_SYSCALL
	help
	  This option is required by programs like Wine to run 16-bit
	  protected mode legacy code on x86 processors.  Disabling
	  this option saves about 300 bytes on i386, or around 6K text
	  plus 16K runtime memory on x86-64,

config X86_ESPFIX32
	def_bool y
	depends on X86_16BIT && X86_32

config X86_ESPFIX64
	def_bool y
	depends on X86_16BIT && X86_64

config X86_VSYSCALL_EMULATION
	bool "Enable vsyscall emulation" if EXPERT
	default y
	depends on X86_64
	help
	  This enables emulation of the legacy vsyscall page.  Disabling
	  it is roughly equivalent to booting with vsyscall=none, except
	  that it will also disable the helpful warning if a program
	  tries to use a vsyscall.  With this option set to N, offending
	  programs will just segfault, citing addresses of the form
	  0xffffffffff600?00.

	  This option is required by many programs built before 2013, and
	  care should be used even with newer programs if set to N.

	  Disabling this option saves about 7K of kernel size and
	  possibly 4K of additional runtime pagetable memory.

config X86_IOPL_IOPERM
	bool "IOPERM and IOPL Emulation"
	default y
	help
	  This enables the ioperm() and iopl() syscalls which are necessary
	  for legacy applications.

	  Legacy IOPL support is an overbroad mechanism which allows user
	  space aside of accessing all 65536 I/O ports also to disable
	  interrupts. To gain this access the caller needs CAP_SYS_RAWIO
	  capabilities and permission from potentially active security
	  modules.

	  The emulation restricts the functionality of the syscall to
	  only allowing the full range I/O port access, but prevents the
	  ability to disable interrupts from user space which would be
	  granted if the hardware IOPL mechanism would be used.

config TOSHIBA
	tristate "Toshiba Laptop support"
	depends on X86_32
	help
	  This adds a driver to safely access the System Management Mode of
	  the CPU on Toshiba portables with a genuine Toshiba BIOS. It does
	  not work on models with a Phoenix BIOS. The System Management Mode
	  is used to set the BIOS and power saving options on Toshiba portables.

	  For information on utilities to make use of this driver see the
	  Toshiba Linux utilities web site at:
	  <http://www.buzzard.org.uk/toshiba/>.

	  Say Y if you intend to run this kernel on a Toshiba portable.
	  Say N otherwise.

config X86_REBOOTFIXUPS
	bool "Enable X86 board specific fixups for reboot"
	depends on X86_32
	help
	  This enables chipset and/or board specific fixups to be done
	  in order to get reboot to work correctly. This is only needed on
	  some combinations of hardware and BIOS. The symptom, for which
	  this config is intended, is when reboot ends with a stalled/hung
	  system.

	  Currently, the only fixup is for the Geode machines using
	  CS5530A and CS5536 chipsets and the RDC R-321x SoC.

	  Say Y if you want to enable the fixup. Currently, it's safe to
	  enable this option even if you don't need it.
	  Say N otherwise.

config MICROCODE
	def_bool y
	depends on CPU_SUP_AMD || CPU_SUP_INTEL

config MICROCODE_INITRD32
	def_bool y
	depends on MICROCODE && X86_32 && BLK_DEV_INITRD

config MICROCODE_LATE_LOADING
	bool "Late microcode loading (DANGEROUS)"
	default n
	depends on MICROCODE && SMP
	help
	  Loading microcode late, when the system is up and executing instructions
	  is a tricky business and should be avoided if possible. Just the sequence
	  of synchronizing all cores and SMT threads is one fragile dance which does
	  not guarantee that cores might not softlock after the loading. Therefore,
	  use this at your own risk. Late loading taints the kernel unless the
	  microcode header indicates that it is safe for late loading via the
	  minimal revision check. This minimal revision check can be enforced on
	  the kernel command line with "microcode.minrev=Y".

config MICROCODE_LATE_FORCE_MINREV
	bool "Enforce late microcode loading minimal revision check"
	default n
	depends on MICROCODE_LATE_LOADING
	help
	  To prevent that users load microcode late which modifies already
	  in use features, newer microcode patches have a minimum revision field
	  in the microcode header, which tells the kernel which minimum
	  revision must be active in the CPU to safely load that new microcode
	  late into the running system. If disabled the check will not
	  be enforced but the kernel will be tainted when the minimal
	  revision check fails.

	  This minimal revision check can also be controlled via the
	  "microcode.minrev" parameter on the kernel command line.

	  If unsure say Y.

config X86_MSR
	tristate "/dev/cpu/*/msr - Model-specific register support"
	help
	  This device gives privileged processes access to the x86
	  Model-Specific Registers (MSRs).  It is a character device with
	  major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr.
	  MSR accesses are directed to a specific CPU on multi-processor
	  systems.

config X86_CPUID
	tristate "/dev/cpu/*/cpuid - CPU information support"
	help
	  This device gives processes access to the x86 CPUID instruction to
	  be executed on a specific processor.  It is a character device
	  with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
	  /dev/cpu/31/cpuid.

choice
	prompt "High Memory Support"
	default HIGHMEM4G
	depends on X86_32

config NOHIGHMEM
	bool "off"
	help
	  Linux can use up to 64 Gigabytes of physical memory on x86 systems.
	  However, the address space of 32-bit x86 processors is only 4
	  Gigabytes large. That means that, if you have a large amount of
	  physical memory, not all of it can be "permanently mapped" by the
	  kernel. The physical memory that's not permanently mapped is called
	  "high memory".

	  If you are compiling a kernel which will never run on a machine with
	  more than 1 Gigabyte total physical RAM, answer "off" here (default
	  choice and suitable for most users). This will result in a "3GB/1GB"
	  split: 3GB are mapped so that each process sees a 3GB virtual memory
	  space and the remaining part of the 4GB virtual memory space is used
	  by the kernel to permanently map as much physical memory as
	  possible.

	  If the machine has between 1 and 4 Gigabytes physical RAM, then
	  answer "4GB" here.

	  If more than 4 Gigabytes is used then answer "64GB" here. This
	  selection turns Intel PAE (Physical Address Extension) mode on.
	  PAE implements 3-level paging on IA32 processors. PAE is fully
	  supported by Linux, PAE mode is implemented on all recent Intel
	  processors (Pentium Pro and better). NOTE: If you say "64GB" here,
	  then the kernel will not boot on CPUs that don't support PAE!

	  The actual amount of total physical memory will either be
	  auto detected or can be forced by using a kernel command line option
	  such as "mem=256M". (Try "man bootparam" or see the documentation of
	  your boot loader (lilo or loadlin) about how to pass options to the
	  kernel at boot time.)

	  If unsure, say "off".

config HIGHMEM4G
	bool "4GB"
	help
	  Select this if you have a 32-bit processor and between 1 and 4
	  gigabytes of physical RAM.

config HIGHMEM64G
	bool "64GB"
	depends on X86_HAVE_PAE
	select X86_PAE
	help
	  Select this if you have a 32-bit processor and more than 4
	  gigabytes of physical RAM.

endchoice

choice
	prompt "Memory split" if EXPERT
	default VMSPLIT_3G
	depends on X86_32
	help
	  Select the desired split between kernel and user memory.

	  If the address range available to the kernel is less than the
	  physical memory installed, the remaining memory will be available
	  as "high memory". Accessing high memory is a little more costly
	  than low memory, as it needs to be mapped into the kernel first.
	  Note that increasing the kernel address space limits the range
	  available to user programs, making the address space there
	  tighter.  Selecting anything other than the default 3G/1G split
	  will also likely make your kernel incompatible with binary-only
	  kernel modules.

	  If you are not absolutely sure what you are doing, leave this
	  option alone!

	config VMSPLIT_3G
		bool "3G/1G user/kernel split"
	config VMSPLIT_3G_OPT
		depends on !X86_PAE
		bool "3G/1G user/kernel split (for full 1G low memory)"
	config VMSPLIT_2G
		bool "2G/2G user/kernel split"
	config VMSPLIT_2G_OPT
		depends on !X86_PAE
		bool "2G/2G user/kernel split (for full 2G low memory)"
	config VMSPLIT_1G
		bool "1G/3G user/kernel split"
endchoice

config PAGE_OFFSET
	hex
	default 0xB0000000 if VMSPLIT_3G_OPT
	default 0x80000000 if VMSPLIT_2G
	default 0x78000000 if VMSPLIT_2G_OPT
	default 0x40000000 if VMSPLIT_1G
	default 0xC0000000
	depends on X86_32

config HIGHMEM
	def_bool y
	depends on X86_32 && (HIGHMEM64G || HIGHMEM4G)

config X86_PAE
	bool "PAE (Physical Address Extension) Support"
	depends on X86_32 && X86_HAVE_PAE
	select PHYS_ADDR_T_64BIT
	select SWIOTLB
	help
	  PAE is required for NX support, and furthermore enables
	  larger swapspace support for non-overcommit purposes. It
	  has the cost of more pagetable lookup overhead, and also
	  consumes more pagetable space per process.

config X86_5LEVEL
	bool "Enable 5-level page tables support"
	default y
	select DYNAMIC_MEMORY_LAYOUT
	select SPARSEMEM_VMEMMAP
	depends on X86_64
	help
	  5-level paging enables access to larger address space:
	  up to 128 PiB of virtual address space and 4 PiB of
	  physical address space.

	  It will be supported by future Intel CPUs.

	  A kernel with the option enabled can be booted on machines that
	  support 4- or 5-level paging.

	  See Documentation/arch/x86/x86_64/5level-paging.rst for more
	  information.

	  Say N if unsure.

config X86_DIRECT_GBPAGES
	def_bool y
	depends on X86_64
	help
	  Certain kernel features effectively disable kernel
	  linear 1 GB mappings (even if the CPU otherwise
	  supports them), so don't confuse the user by printing
	  that we have them enabled.

config X86_CPA_STATISTICS
	bool "Enable statistic for Change Page Attribute"
	depends on DEBUG_FS
	help
	  Expose statistics about the Change Page Attribute mechanism, which
	  helps to determine the effectiveness of preserving large and huge
	  page mappings when mapping protections are changed.

config X86_MEM_ENCRYPT
	select ARCH_HAS_FORCE_DMA_UNENCRYPTED
	select DYNAMIC_PHYSICAL_MASK
	def_bool n

config AMD_MEM_ENCRYPT
	bool "AMD Secure Memory Encryption (SME) support"
	depends on X86_64 && CPU_SUP_AMD
	depends on EFI_STUB
	select DMA_COHERENT_POOL
	select ARCH_USE_MEMREMAP_PROT
	select INSTRUCTION_DECODER
	select ARCH_HAS_CC_PLATFORM
	select X86_MEM_ENCRYPT
	select UNACCEPTED_MEMORY
	help
	  Say yes to enable support for the encryption of system memory.
	  This requires an AMD processor that supports Secure Memory
	  Encryption (SME).

# Common NUMA Features
config NUMA
	bool "NUMA Memory Allocation and Scheduler Support"
	depends on SMP
	depends on X86_64 || (X86_32 && HIGHMEM64G && X86_BIGSMP)
	default y if X86_BIGSMP
	select USE_PERCPU_NUMA_NODE_ID
	select OF_NUMA if OF
	help
	  Enable NUMA (Non-Uniform Memory Access) support.

	  The kernel will try to allocate memory used by a CPU on the
	  local memory controller of the CPU and add some more
	  NUMA awareness to the kernel.

	  For 64-bit this is recommended if the system is Intel Core i7
	  (or later), AMD Opteron, or EM64T NUMA.

	  For 32-bit this is only needed if you boot a 32-bit
	  kernel on a 64-bit NUMA platform.

	  Otherwise, you should say N.

config AMD_NUMA
	def_bool y
	prompt "Old style AMD Opteron NUMA detection"
	depends on X86_64 && NUMA && PCI
	help
	  Enable AMD NUMA node topology detection.  You should say Y here if
	  you have a multi processor AMD system. This uses an old method to
	  read the NUMA configuration directly from the builtin Northbridge
	  of Opteron. It is recommended to use X86_64_ACPI_NUMA instead,
	  which also takes priority if both are compiled in.

config X86_64_ACPI_NUMA
	def_bool y
	prompt "ACPI NUMA detection"
	depends on X86_64 && NUMA && ACPI && PCI
	select ACPI_NUMA
	help
	  Enable ACPI SRAT based node topology detection.

config NUMA_EMU
	bool "NUMA emulation"
	depends on NUMA
	help
	  Enable NUMA emulation. A flat machine will be split
	  into virtual nodes when booted with "numa=fake=N", where N is the
	  number of nodes. This is only useful for debugging.

config NODES_SHIFT
	int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP
	range 1 10
	default "10" if MAXSMP
	default "6" if X86_64
	default "3"
	depends on NUMA
	help
	  Specify the maximum number of NUMA Nodes available on the target
	  system.  Increases memory reserved to accommodate various tables.

config ARCH_FLATMEM_ENABLE
	def_bool y
	depends on X86_32 && !NUMA

config ARCH_SPARSEMEM_ENABLE
	def_bool y
	depends on X86_64 || NUMA || X86_32 || X86_32_NON_STANDARD
	select SPARSEMEM_STATIC if X86_32
	select SPARSEMEM_VMEMMAP_ENABLE if X86_64

config ARCH_SPARSEMEM_DEFAULT
	def_bool X86_64 || (NUMA && X86_32)

config ARCH_SELECT_MEMORY_MODEL
	def_bool y
	depends on ARCH_SPARSEMEM_ENABLE && ARCH_FLATMEM_ENABLE

config ARCH_MEMORY_PROBE
	bool "Enable sysfs memory/probe interface"
	depends on MEMORY_HOTPLUG
	help
	  This option enables a sysfs memory/probe interface for testing.
	  See Documentation/admin-guide/mm/memory-hotplug.rst for more information.
	  If you are unsure how to answer this question, answer N.

config ARCH_PROC_KCORE_TEXT
	def_bool y
	depends on X86_64 && PROC_KCORE

config ILLEGAL_POINTER_VALUE
	hex
	default 0 if X86_32
	default 0xdead000000000000 if X86_64

config X86_PMEM_LEGACY_DEVICE
	bool

config X86_PMEM_LEGACY
	tristate "Support non-standard NVDIMMs and ADR protected memory"
	depends on PHYS_ADDR_T_64BIT
	depends on BLK_DEV
	select X86_PMEM_LEGACY_DEVICE
	select NUMA_KEEP_MEMINFO if NUMA
	select LIBNVDIMM
	help
	  Treat memory marked using the non-standard e820 type of 12 as used
	  by the Intel Sandy Bridge-EP reference BIOS as protected memory.
	  The kernel will offer these regions to the 'pmem' driver so
	  they can be used for persistent storage.

	  Say Y if unsure.

config HIGHPTE
	bool "Allocate 3rd-level pagetables from highmem"
	depends on HIGHMEM
	help
	  The VM uses one page table entry for each page of physical memory.
	  For systems with a lot of RAM, this can be wasteful of precious
	  low memory.  Setting this option will put user-space page table
	  entries in high memory.

config X86_CHECK_BIOS_CORRUPTION
	bool "Check for low memory corruption"
	help
	  Periodically check for memory corruption in low memory, which
	  is suspected to be caused by BIOS.  Even when enabled in the
	  configuration, it is disabled at runtime.  Enable it by
	  setting "memory_corruption_check=1" on the kernel command
	  line.  By default it scans the low 64k of memory every 60
	  seconds; see the memory_corruption_check_size and
	  memory_corruption_check_period parameters in
	  Documentation/admin-guide/kernel-parameters.rst to adjust this.

	  When enabled with the default parameters, this option has
	  almost no overhead, as it reserves a relatively small amount
	  of memory and scans it infrequently.  It both detects corruption
	  and prevents it from affecting the running system.

	  It is, however, intended as a diagnostic tool; if repeatable
	  BIOS-originated corruption always affects the same memory,
	  you can use memmap= to prevent the kernel from using that
	  memory.

config X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK
	bool "Set the default setting of memory_corruption_check"
	depends on X86_CHECK_BIOS_CORRUPTION
	default y
	help
	  Set whether the default state of memory_corruption_check is
	  on or off.

config MATH_EMULATION
	bool
	depends on MODIFY_LDT_SYSCALL
	prompt "Math emulation" if X86_32 && (M486SX || MELAN)
	help
	  Linux can emulate a math coprocessor (used for floating point
	  operations) if you don't have one. 486DX and Pentium processors have
	  a math coprocessor built in, 486SX and 386 do not, unless you added
	  a 487DX or 387, respectively. (The messages during boot time can
	  give you some hints here ["man dmesg"].) Everyone needs either a
	  coprocessor or this emulation.

	  If you don't have a math coprocessor, you need to say Y here; if you
	  say Y here even though you have a coprocessor, the coprocessor will
	  be used nevertheless. (This behavior can be changed with the kernel
	  command line option "no387", which comes handy if your coprocessor
	  is broken. Try "man bootparam" or see the documentation of your boot
	  loader (lilo or loadlin) about how to pass options to the kernel at
	  boot time.) This means that it is a good idea to say Y here if you
	  intend to use this kernel on different machines.

	  More information about the internals of the Linux math coprocessor
	  emulation can be found in <file:arch/x86/math-emu/README>.

	  If you are not sure, say Y; apart from resulting in a 66 KB bigger
	  kernel, it won't hurt.

config MTRR
	def_bool y
	prompt "MTRR (Memory Type Range Register) support" if EXPERT
	help
	  On Intel P6 family processors (Pentium Pro, Pentium II and later)
	  the Memory Type Range Registers (MTRRs) may be used to control
	  processor access to memory ranges. This is most useful if you have
	  a video (VGA) card on a PCI or AGP bus. Enabling write-combining
	  allows bus write transfers to be combined into a larger transfer
	  before bursting over the PCI/AGP bus. This can increase performance
	  of image write operations 2.5 times or more. Saying Y here creates a
	  /proc/mtrr file which may be used to manipulate your processor's
	  MTRRs. Typically the X server should use this.

	  This code has a reasonably generic interface so that similar
	  control registers on other processors can be easily supported
	  as well:

	  The Cyrix 6x86, 6x86MX and M II processors have Address Range
	  Registers (ARRs) which provide a similar functionality to MTRRs. For
	  these, the ARRs are used to emulate the MTRRs.
	  The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
	  MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing
	  write-combining. All of these processors are supported by this code
	  and it makes sense to say Y here if you have one of them.

	  Saying Y here also fixes a problem with buggy SMP BIOSes which only
	  set the MTRRs for the boot CPU and not for the secondary CPUs. This
	  can lead to all sorts of problems, so it's good to say Y here.

	  You can safely say Y even if your machine doesn't have MTRRs, you'll
	  just add about 9 KB to your kernel.

	  See <file:Documentation/arch/x86/mtrr.rst> for more information.

config MTRR_SANITIZER
	def_bool y
	prompt "MTRR cleanup support"
	depends on MTRR
	help
	  Convert MTRR layout from continuous to discrete, so X drivers can
	  add writeback entries.

	  Can be disabled with disable_mtrr_cleanup on the kernel command line.
	  The largest mtrr entry size for a continuous block can be set with
	  mtrr_chunk_size.

	  If unsure, say Y.

config MTRR_SANITIZER_ENABLE_DEFAULT
	int "MTRR cleanup enable value (0-1)"
	range 0 1
	default "0"
	depends on MTRR_SANITIZER
	help
	  Enable mtrr cleanup default value

config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT
	int "MTRR cleanup spare reg num (0-7)"
	range 0 7
	default "1"
	depends on MTRR_SANITIZER
	help
	  mtrr cleanup spare entries default, it can be changed via
	  mtrr_spare_reg_nr=N on the kernel command line.

config X86_PAT
	def_bool y
	prompt "x86 PAT support" if EXPERT
	depends on MTRR
	help
	  Use PAT attributes to setup page level cache control.

	  PATs are the modern equivalents of MTRRs and are much more
	  flexible than MTRRs.

	  Say N here if you see bootup problems (boot crash, boot hang,
	  spontaneous reboots) or a non-working video driver.

	  If unsure, say Y.

config ARCH_USES_PG_UNCACHED
	def_bool y
	depends on X86_PAT

config X86_UMIP
	def_bool y
	prompt "User Mode Instruction Prevention" if EXPERT
	help
	  User Mode Instruction Prevention (UMIP) is a security feature in
	  some x86 processors. If enabled, a general protection fault is
	  issued if the SGDT, SLDT, SIDT, SMSW or STR instructions are
	  executed in user mode. These instructions unnecessarily expose
	  information about the hardware state.

	  The vast majority of applications do not use these instructions.
	  For the very few that do, software emulation is provided in
	  specific cases in protected and virtual-8086 modes. Emulated
	  results are dummy.

config CC_HAS_IBT
	# GCC >= 9 and binutils >= 2.29
	# Retpoline check to work around https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93654
	# Clang/LLVM >= 14
	# https://github.com/llvm/llvm-project/commit/e0b89df2e0f0130881bf6c39bf31d7f6aac00e0f
	# https://github.com/llvm/llvm-project/commit/dfcf69770bc522b9e411c66454934a37c1f35332
	def_bool ((CC_IS_GCC && $(cc-option, -fcf-protection=branch -mindirect-branch-register)) || \
		  (CC_IS_CLANG && CLANG_VERSION >= 140000)) && \
		  $(as-instr,endbr64)

config X86_CET
	def_bool n
	help
	  CET features configured (Shadow stack or IBT)

config X86_KERNEL_IBT
	prompt "Indirect Branch Tracking"
	def_bool y
	depends on X86_64 && CC_HAS_IBT && HAVE_OBJTOOL
	# https://github.com/llvm/llvm-project/commit/9d7001eba9c4cb311e03cd8cdc231f9e579f2d0f
	depends on !LD_IS_LLD || LLD_VERSION >= 140000
	select OBJTOOL
	select X86_CET
	help
	  Build the kernel with support for Indirect Branch Tracking, a
	  hardware support course-grain forward-edge Control Flow Integrity
	  protection. It enforces that all indirect calls must land on
	  an ENDBR instruction, as such, the compiler will instrument the
	  code with them to make this happen.

	  In addition to building the kernel with IBT, seal all functions that
	  are not indirect call targets, avoiding them ever becoming one.

	  This requires LTO like objtool runs and will slow down the build. It
	  does significantly reduce the number of ENDBR instructions in the
	  kernel image.

config X86_INTEL_MEMORY_PROTECTION_KEYS
	prompt "Memory Protection Keys"
	def_bool y
	# Note: only available in 64-bit mode
	depends on X86_64 && (CPU_SUP_INTEL || CPU_SUP_AMD)
	select ARCH_USES_HIGH_VMA_FLAGS
	select ARCH_HAS_PKEYS
	help
	  Memory Protection Keys provides a mechanism for enforcing
	  page-based protections, but without requiring modification of the
	  page tables when an application changes protection domains.

	  For details, see Documentation/core-api/protection-keys.rst

	  If unsure, say y.

choice
	prompt "TSX enable mode"
	depends on CPU_SUP_INTEL
	default X86_INTEL_TSX_MODE_OFF
	help
	  Intel's TSX (Transactional Synchronization Extensions) feature
	  allows to optimize locking protocols through lock elision which
	  can lead to a noticeable performance boost.

	  On the other hand it has been shown that TSX can be exploited
	  to form side channel attacks (e.g. TAA) and chances are there
	  will be more of those attacks discovered in the future.

	  Therefore TSX is not enabled by default (aka tsx=off). An admin
	  might override this decision by tsx=on the command line parameter.
	  Even with TSX enabled, the kernel will attempt to enable the best
	  possible TAA mitigation setting depending on the microcode available
	  for the particular machine.

	  This option allows to set the default tsx mode between tsx=on, =off
	  and =auto. See Documentation/admin-guide/kernel-parameters.txt for more
	  details.

	  Say off if not sure, auto if TSX is in use but it should be used on safe
	  platforms or on if TSX is in use and the security aspect of tsx is not
	  relevant.

config X86_INTEL_TSX_MODE_OFF
	bool "off"
	help
	  TSX is disabled if possible - equals to tsx=off command line parameter.

config X86_INTEL_TSX_MODE_ON
	bool "on"
	help
	  TSX is always enabled on TSX capable HW - equals the tsx=on command
	  line parameter.

config X86_INTEL_TSX_MODE_AUTO
	bool "auto"
	help
	  TSX is enabled on TSX capable HW that is believed to be safe against
	  side channel attacks- equals the tsx=auto command line parameter.
endchoice

config X86_SGX
	bool "Software Guard eXtensions (SGX)"
	depends on X86_64 && CPU_SUP_INTEL && X86_X2APIC
	depends on CRYPTO=y
	depends on CRYPTO_SHA256=y
	select MMU_NOTIFIER
	select NUMA_KEEP_MEMINFO if NUMA
	select XARRAY_MULTI
	help
	  Intel(R) Software Guard eXtensions (SGX) is a set of CPU instructions
	  that can be used by applications to set aside private regions of code
	  and data, referred to as enclaves. An enclave's private memory can
	  only be accessed by code running within the enclave. Accesses from
	  outside the enclave, including other enclaves, are disallowed by
	  hardware.

	  If unsure, say N.

config X86_USER_SHADOW_STACK
	bool "X86 userspace shadow stack"
	depends on AS_WRUSS
	depends on X86_64
	select ARCH_USES_HIGH_VMA_FLAGS
	select X86_CET
	help
	  Shadow stack protection is a hardware feature that detects function
	  return address corruption.  This helps mitigate ROP attacks.
	  Applications must be enabled to use it, and old userspace does not
	  get protection "for free".

	  CPUs supporting shadow stacks were first released in 2020.

	  See Documentation/arch/x86/shstk.rst for more information.

	  If unsure, say N.

config INTEL_TDX_HOST
	bool "Intel Trust Domain Extensions (TDX) host support"
	depends on CPU_SUP_INTEL
	depends on X86_64
	depends on KVM_INTEL
	depends on X86_X2APIC
	select ARCH_KEEP_MEMBLOCK
	depends on CONTIG_ALLOC
	depends on !KEXEC_CORE
	depends on X86_MCE
	help
	  Intel Trust Domain Extensions (TDX) protects guest VMs from malicious
	  host and certain physical attacks.  This option enables necessary TDX
	  support in the host kernel to run confidential VMs.

	  If unsure, say N.

config EFI
	bool "EFI runtime service support"
	depends on ACPI
	select UCS2_STRING
	select EFI_RUNTIME_WRAPPERS
	select ARCH_USE_MEMREMAP_PROT
	select EFI_RUNTIME_MAP if KEXEC_CORE
	help
	  This enables the kernel to use EFI runtime services that are
	  available (such as the EFI variable services).

	  This option is only useful on systems that have EFI firmware.
	  In addition, you should use the latest ELILO loader available
	  at <http://elilo.sourceforge.net> in order to take advantage
	  of EFI runtime services. However, even with this option, the
	  resultant kernel should continue to boot on existing non-EFI
	  platforms.

config EFI_STUB
	bool "EFI stub support"
	depends on EFI
	select RELOCATABLE
	help
	  This kernel feature allows a bzImage to be loaded directly
	  by EFI firmware without the use of a bootloader.

	  See Documentation/admin-guide/efi-stub.rst for more information.

config EFI_HANDOVER_PROTOCOL
	bool "EFI handover protocol (DEPRECATED)"
	depends on EFI_STUB
	default y
	help
	  Select this in order to include support for the deprecated EFI
	  handover protocol, which defines alternative entry points into the
	  EFI stub.  This is a practice that has no basis in the UEFI
	  specification, and requires a priori knowledge on the part of the
	  bootloader about Linux/x86 specific ways of passing the command line
	  and initrd, and where in memory those assets may be loaded.

	  If in doubt, say Y. Even though the corresponding support is not
	  present in upstream GRUB or other bootloaders, most distros build
	  GRUB with numerous downstream patches applied, and may rely on the
	  handover protocol as as result.

config EFI_MIXED
	bool "EFI mixed-mode support"
	depends on EFI_STUB && X86_64
	help
	  Enabling this feature allows a 64-bit kernel to be booted
	  on a 32-bit firmware, provided that your CPU supports 64-bit
	  mode.

	  Note that it is not possible to boot a mixed-mode enabled
	  kernel via the EFI boot stub - a bootloader that supports
	  the EFI handover protocol must be used.

	  If unsure, say N.

config EFI_FAKE_MEMMAP
	bool "Enable EFI fake memory map"
	depends on EFI
	help
	  Saying Y here will enable "efi_fake_mem" boot option.  By specifying
	  this parameter, you can add arbitrary attribute to specific memory
	  range by updating original (firmware provided) EFI memmap.  This is
	  useful for debugging of EFI memmap related feature, e.g., Address
	  Range Mirroring feature.

config EFI_MAX_FAKE_MEM
	int "maximum allowable number of ranges in efi_fake_mem boot option"
	depends on EFI_FAKE_MEMMAP
	range 1 128
	default 8
	help
	  Maximum allowable number of ranges in efi_fake_mem boot option.
	  Ranges can be set up to this value using comma-separated list.
	  The default value is 8.

config EFI_RUNTIME_MAP
	bool "Export EFI runtime maps to sysfs" if EXPERT
	depends on EFI
	help
	  Export EFI runtime memory regions to /sys/firmware/efi/runtime-map.
	  That memory map is required by the 2nd kernel to set up EFI virtual
	  mappings after kexec, but can also be used for debugging purposes.

	  See also Documentation/ABI/testing/sysfs-firmware-efi-runtime-map.

source "kernel/Kconfig.hz"

config ARCH_SUPPORTS_KEXEC
	def_bool y

config ARCH_SUPPORTS_KEXEC_FILE
	def_bool X86_64

config ARCH_SELECTS_KEXEC_FILE
	def_bool y
	depends on KEXEC_FILE
	select HAVE_IMA_KEXEC if IMA

config ARCH_SUPPORTS_KEXEC_PURGATORY
	def_bool y

config ARCH_SUPPORTS_KEXEC_SIG
	def_bool y

config ARCH_SUPPORTS_KEXEC_SIG_FORCE
	def_bool y

config ARCH_SUPPORTS_KEXEC_BZIMAGE_VERIFY_SIG
	def_bool y

config ARCH_SUPPORTS_KEXEC_JUMP
	def_bool y

config ARCH_SUPPORTS_CRASH_DUMP
	def_bool X86_64 || (X86_32 && HIGHMEM)

config ARCH_SUPPORTS_CRASH_HOTPLUG
	def_bool y

config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
	def_bool CRASH_RESERVE

config PHYSICAL_START
	hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
	default "0x1000000"
	help
	  This gives the physical address where the kernel is loaded.

	  If the kernel is not relocatable (CONFIG_RELOCATABLE=n) then bzImage
	  will decompress itself to above physical address and run from there.
	  Otherwise, bzImage will run from the address where it has been loaded
	  by the boot loader. The only exception is if it is loaded below the
	  above physical address, in which case it will relocate itself there.

	  In normal kdump cases one does not have to set/change this option
	  as now bzImage can be compiled as a completely relocatable image
	  (CONFIG_RELOCATABLE=y) and be used to load and run from a different
	  address. This option is mainly useful for the folks who don't want
	  to use a bzImage for capturing the crash dump and want to use a
	  vmlinux instead. vmlinux is not relocatable hence a kernel needs
	  to be specifically compiled to run from a specific memory area
	  (normally a reserved region) and this option comes handy.

	  So if you are using bzImage for capturing the crash dump,
	  leave the value here unchanged to 0x1000000 and set
	  CONFIG_RELOCATABLE=y.  Otherwise if you plan to use vmlinux
	  for capturing the crash dump change this value to start of
	  the reserved region.  In other words, it can be set based on
	  the "X" value as specified in the "crashkernel=YM@XM"
	  command line boot parameter passed to the panic-ed
	  kernel. Please take a look at Documentation/admin-guide/kdump/kdump.rst
	  for more details about crash dumps.

	  Usage of bzImage for capturing the crash dump is recommended as
	  one does not have to build two kernels. Same kernel can be used
	  as production kernel and capture kernel. Above option should have
	  gone away after relocatable bzImage support is introduced. But it
	  is present because there are users out there who continue to use
	  vmlinux for dump capture. This option should go away down the
	  line.

	  Don't change this unless you know what you are doing.

config RELOCATABLE
	bool "Build a relocatable kernel"
	default y
	help
	  This builds a kernel image that retains relocation information
	  so it can be loaded someplace besides the default 1MB.
	  The relocations tend to make the kernel binary about 10% larger,
	  but are discarded at runtime.

	  One use is for the kexec on panic case where the recovery kernel
	  must live at a different physical address than the primary
	  kernel.

	  Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
	  it has been loaded at and the compile time physical address
	  (CONFIG_PHYSICAL_START) is used as the minimum location.

config RANDOMIZE_BASE
	bool "Randomize the address of the kernel image (KASLR)"
	depends on RELOCATABLE
	default y
	help
	  In support of Kernel Address Space Layout Randomization (KASLR),
	  this randomizes the physical address at which the kernel image
	  is decompressed and the virtual address where the kernel
	  image is mapped, as a security feature that deters exploit
	  attempts relying on knowledge of the location of kernel
	  code internals.

	  On 64-bit, the kernel physical and virtual addresses are
	  randomized separately. The physical address will be anywhere
	  between 16MB and the top of physical memory (up to 64TB). The
	  virtual address will be randomized from 16MB up to 1GB (9 bits
	  of entropy). Note that this also reduces the memory space
	  available to kernel modules from 1.5GB to 1GB.

	  On 32-bit, the kernel physical and virtual addresses are
	  randomized together. They will be randomized from 16MB up to
	  512MB (8 bits of entropy).

	  Entropy is generated using the RDRAND instruction if it is
	  supported. If RDTSC is supported, its value is mixed into
	  the entropy pool as well. If neither RDRAND nor RDTSC are
	  supported, then entropy is read from the i8254 timer. The
	  usable entropy is limited by the kernel being built using
	  2GB addressing, and that PHYSICAL_ALIGN must be at a
	  minimum of 2MB. As a result, only 10 bits of entropy are
	  theoretically possible, but the implementations are further
	  limited due to memory layouts.

	  If unsure, say Y.

# Relocation on x86 needs some additional build support
config X86_NEED_RELOCS
	def_bool y
	depends on RANDOMIZE_BASE || (X86_32 && RELOCATABLE)

config PHYSICAL_ALIGN
	hex "Alignment value to which kernel should be aligned"
	default "0x200000"
	range 0x2000 0x1000000 if X86_32
	range 0x200000 0x1000000 if X86_64
	help
	  This value puts the alignment restrictions on physical address
	  where kernel is loaded and run from. Kernel is compiled for an
	  address which meets above alignment restriction.

	  If bootloader loads the kernel at a non-aligned address and
	  CONFIG_RELOCATABLE is set, kernel will move itself to nearest
	  address aligned to above value and run from there.

	  If bootloader loads the kernel at a non-aligned address and
	  CONFIG_RELOCATABLE is not set, kernel will ignore the run time
	  load address and decompress itself to the address it has been
	  compiled for and run from there. The address for which kernel is
	  compiled already meets above alignment restrictions. Hence the
	  end result is that kernel runs from a physical address meeting
	  above alignment restrictions.

	  On 32-bit this value must be a multiple of 0x2000. On 64-bit
	  this value must be a multiple of 0x200000.

	  Don't change this unless you know what you are doing.

config DYNAMIC_MEMORY_LAYOUT
	bool
	help
	  This option makes base addresses of vmalloc and vmemmap as well as
	  __PAGE_OFFSET movable during boot.

config RANDOMIZE_MEMORY
	bool "Randomize the kernel memory sections"
	depends on X86_64
	depends on RANDOMIZE_BASE
	select DYNAMIC_MEMORY_LAYOUT
	default RANDOMIZE_BASE
	help
	  Randomizes the base virtual address of kernel memory sections
	  (physical memory mapping, vmalloc & vmemmap). This security feature
	  makes exploits relying on predictable memory locations less reliable.

	  The order of allocations remains unchanged. Entropy is generated in
	  the same way as RANDOMIZE_BASE. Current implementation in the optimal
	  configuration have in average 30,000 different possible virtual
	  addresses for each memory section.

	  If unsure, say Y.

config RANDOMIZE_MEMORY_PHYSICAL_PADDING
	hex "Physical memory mapping padding" if EXPERT
	depends on RANDOMIZE_MEMORY
	default "0xa" if MEMORY_HOTPLUG
	default "0x0"
	range 0x1 0x40 if MEMORY_HOTPLUG
	range 0x0 0x40
	help
	  Define the padding in terabytes added to the existing physical
	  memory size during kernel memory randomization. It is useful
	  for memory hotplug support but reduces the entropy available for
	  address randomization.

	  If unsure, leave at the default value.

config ADDRESS_MASKING
	bool "Linear Address Masking support"
	depends on X86_64
	help
	  Linear Address Masking (LAM) modifies the checking that is applied
	  to 64-bit linear addresses, allowing software to use of the
	  untranslated address bits for metadata.

	  The capability can be used for efficient address sanitizers (ASAN)
	  implementation and for optimizations in JITs.

config HOTPLUG_CPU
	def_bool y
	depends on SMP

config COMPAT_VDSO
	def_bool n
	prompt "Disable the 32-bit vDSO (needed for glibc 2.3.3)"
	depends on COMPAT_32
	help
	  Certain buggy versions of glibc will crash if they are
	  presented with a 32-bit vDSO that is not mapped at the address
	  indicated in its segment table.

	  The bug was introduced by f866314b89d56845f55e6f365e18b31ec978ec3a
	  and fixed by 3b3ddb4f7db98ec9e912ccdf54d35df4aa30e04a and
	  49ad572a70b8aeb91e57483a11dd1b77e31c4468.  Glibc 2.3.3 is
	  the only released version with the bug, but OpenSUSE 9
	  contains a buggy "glibc 2.3.2".

	  The symptom of the bug is that everything crashes on startup, saying:
	  dl_main: Assertion `(void *) ph->p_vaddr == _rtld_local._dl_sysinfo_dso' failed!

	  Saying Y here changes the default value of the vdso32 boot
	  option from 1 to 0, which turns off the 32-bit vDSO entirely.
	  This works around the glibc bug but hurts performance.

	  If unsure, say N: if you are compiling your own kernel, you
	  are unlikely to be using a buggy version of glibc.

choice
	prompt "vsyscall table for legacy applications"
	depends on X86_64
	default LEGACY_VSYSCALL_XONLY
	help
	  Legacy user code that does not know how to find the vDSO expects
	  to be able to issue three syscalls by calling fixed addresses in
	  kernel space. Since this location is not randomized with ASLR,
	  it can be used to assist security vulnerability exploitation.

	  This setting can be changed at boot time via the kernel command
	  line parameter vsyscall=[emulate|xonly|none].  Emulate mode
	  is deprecated and can only be enabled using the kernel command
	  line.

	  On a system with recent enough glibc (2.14 or newer) and no
	  static binaries, you can say None without a performance penalty
	  to improve security.

	  If unsure, select "Emulate execution only".

	config LEGACY_VSYSCALL_XONLY
		bool "Emulate execution only"
		help
		  The kernel traps and emulates calls into the fixed vsyscall
		  address mapping and does not allow reads.  This
		  configuration is recommended when userspace might use the
		  legacy vsyscall area but support for legacy binary
		  instrumentation of legacy code is not needed.  It mitigates
		  certain uses of the vsyscall area as an ASLR-bypassing
		  buffer.

	config LEGACY_VSYSCALL_NONE
		bool "None"
		help
		  There will be no vsyscall mapping at all. This will
		  eliminate any risk of ASLR bypass due to the vsyscall
		  fixed address mapping. Attempts to use the vsyscalls
		  will be reported to dmesg, so that either old or
		  malicious userspace programs can be identified.

endchoice

config CMDLINE_BOOL
	bool "Built-in kernel command line"
	help
	  Allow for specifying boot arguments to the kernel at
	  build time.  On some systems (e.g. embedded ones), it is
	  necessary or convenient to provide some or all of the
	  kernel boot arguments with the kernel itself (that is,
	  to not rely on the boot loader to provide them.)

	  To compile command line arguments into the kernel,
	  set this option to 'Y', then fill in the
	  boot arguments in CONFIG_CMDLINE.

	  Systems with fully functional boot loaders (i.e. non-embedded)
	  should leave this option set to 'N'.

config CMDLINE
	string "Built-in kernel command string"
	depends on CMDLINE_BOOL
	default ""
	help
	  Enter arguments here that should be compiled into the kernel
	  image and used at boot time.  If the boot loader provides a
	  command line at boot time, it is appended to this string to
	  form the full kernel command line, when the system boots.

	  However, you can use the CONFIG_CMDLINE_OVERRIDE option to
	  change this behavior.

	  In most cases, the command line (whether built-in or provided
	  by the boot loader) should specify the device for the root
	  file system.

config CMDLINE_OVERRIDE
	bool "Built-in command line overrides boot loader arguments"
	depends on CMDLINE_BOOL && CMDLINE != ""
	help
	  Set this option to 'Y' to have the kernel ignore the boot loader
	  command line, and use ONLY the built-in command line.

	  This is used to work around broken boot loaders.  This should
	  be set to 'N' under normal conditions.

config MODIFY_LDT_SYSCALL
	bool "Enable the LDT (local descriptor table)" if EXPERT
	default y
	help
	  Linux can allow user programs to install a per-process x86
	  Local Descriptor Table (LDT) using the modify_ldt(2) system
	  call.  This is required to run 16-bit or segmented code such as
	  DOSEMU or some Wine programs.  It is also used by some very old
	  threading libraries.

	  Enabling this feature adds a small amount of overhead to
	  context switches and increases the low-level kernel attack
	  surface.  Disabling it removes the modify_ldt(2) system call.

	  Saying 'N' here may make sense for embedded or server kernels.

config STRICT_SIGALTSTACK_SIZE
	bool "Enforce strict size checking for sigaltstack"
	depends on DYNAMIC_SIGFRAME
	help
	  For historical reasons MINSIGSTKSZ is a constant which became
	  already too small with AVX512 support. Add a mechanism to
	  enforce strict checking of the sigaltstack size against the
	  real size of the FPU frame. This option enables the check
	  by default. It can also be controlled via the kernel command
	  line option 'strict_sas_size' independent of this config
	  switch. Enabling it might break existing applications which
	  allocate a too small sigaltstack but 'work' because they
	  never get a signal delivered.

	  Say 'N' unless you want to really enforce this check.

source "kernel/livepatch/Kconfig"

endmenu

config CC_HAS_NAMED_AS
	def_bool CC_IS_GCC && GCC_VERSION >= 90100

config CC_HAS_NAMED_AS_FIXED_SANITIZERS
	def_bool CC_IS_GCC && GCC_VERSION >= 130300

config USE_X86_SEG_SUPPORT
	def_bool y
	depends on CC_HAS_NAMED_AS
	#
	# -fsanitize=kernel-address (KASAN) and -fsanitize=thread
	# (KCSAN) are incompatible with named address spaces with
	# GCC < 13.3 - see GCC PR sanitizer/111736.
	#
	depends on !(KASAN || KCSAN) || CC_HAS_NAMED_AS_FIXED_SANITIZERS

config CC_HAS_SLS
	def_bool $(cc-option,-mharden-sls=all)

config CC_HAS_RETURN_THUNK
	def_bool $(cc-option,-mfunction-return=thunk-extern)

config CC_HAS_ENTRY_PADDING
	def_bool $(cc-option,-fpatchable-function-entry=16,16)

config FUNCTION_PADDING_CFI
	int
	default 59 if FUNCTION_ALIGNMENT_64B
	default 27 if FUNCTION_ALIGNMENT_32B
	default 11 if FUNCTION_ALIGNMENT_16B
	default  3 if FUNCTION_ALIGNMENT_8B
	default  0

# Basically: FUNCTION_ALIGNMENT - 5*CFI_CLANG
# except Kconfig can't do arithmetic :/
config FUNCTION_PADDING_BYTES
	int
	default FUNCTION_PADDING_CFI if CFI_CLANG
	default FUNCTION_ALIGNMENT

config CALL_PADDING
	def_bool n
	depends on CC_HAS_ENTRY_PADDING && OBJTOOL
	select FUNCTION_ALIGNMENT_16B

config FINEIBT
	def_bool y
	depends on X86_KERNEL_IBT && CFI_CLANG && MITIGATION_RETPOLINE
	select CALL_PADDING

config HAVE_CALL_THUNKS
	def_bool y
	depends on CC_HAS_ENTRY_PADDING && MITIGATION_RETHUNK && OBJTOOL

config CALL_THUNKS
	def_bool n
	select CALL_PADDING

config PREFIX_SYMBOLS
	def_bool y
	depends on CALL_PADDING && !CFI_CLANG

menuconfig SPECULATION_MITIGATIONS
	bool "Mitigations for speculative execution vulnerabilities"
	default y
	help
	  Say Y here to enable options which enable mitigations for
	  speculative execution hardware vulnerabilities.

	  If you say N, all mitigations will be disabled. You really
	  should know what you are doing to say so.

if SPECULATION_MITIGATIONS

config MITIGATION_PAGE_TABLE_ISOLATION
	bool "Remove the kernel mapping in user mode"
	default y
	depends on (X86_64 || X86_PAE)
	help
	  This feature reduces the number of hardware side channels by
	  ensuring that the majority of kernel addresses are not mapped
	  into userspace.

	  See Documentation/arch/x86/pti.rst for more details.

config MITIGATION_RETPOLINE
	bool "Avoid speculative indirect branches in kernel"
	select OBJTOOL if HAVE_OBJTOOL
	default y
	help
	  Compile kernel with the retpoline compiler options to guard against
	  kernel-to-user data leaks by avoiding speculative indirect
	  branches. Requires a compiler with -mindirect-branch=thunk-extern
	  support for full protection. The kernel may run slower.

config MITIGATION_RETHUNK
	bool "Enable return-thunks"
	depends on MITIGATION_RETPOLINE && CC_HAS_RETURN_THUNK
	select OBJTOOL if HAVE_OBJTOOL
	default y if X86_64
	help
	  Compile the kernel with the return-thunks compiler option to guard
	  against kernel-to-user data leaks by avoiding return speculation.
	  Requires a compiler with -mfunction-return=thunk-extern
	  support for full protection. The kernel may run slower.

config MITIGATION_UNRET_ENTRY
	bool "Enable UNRET on kernel entry"
	depends on CPU_SUP_AMD && MITIGATION_RETHUNK && X86_64
	default y
	help
	  Compile the kernel with support for the retbleed=unret mitigation.

config MITIGATION_CALL_DEPTH_TRACKING
	bool "Mitigate RSB underflow with call depth tracking"
	depends on CPU_SUP_INTEL && HAVE_CALL_THUNKS
	select HAVE_DYNAMIC_FTRACE_NO_PATCHABLE
	select CALL_THUNKS
	default y
	help
	  Compile the kernel with call depth tracking to mitigate the Intel
	  SKL Return-Speculation-Buffer (RSB) underflow issue. The
	  mitigation is off by default and needs to be enabled on the
	  kernel command line via the retbleed=stuff option. For
	  non-affected systems the overhead of this option is marginal as
	  the call depth tracking is using run-time generated call thunks
	  in a compiler generated padding area and call patching. This
	  increases text size by ~5%. For non affected systems this space
	  is unused. On affected SKL systems this results in a significant
	  performance gain over the IBRS mitigation.

config CALL_THUNKS_DEBUG
	bool "Enable call thunks and call depth tracking debugging"
	depends on MITIGATION_CALL_DEPTH_TRACKING
	select FUNCTION_ALIGNMENT_32B
	default n
	help
	  Enable call/ret counters for imbalance detection and build in
	  a noisy dmesg about callthunks generation and call patching for
	  trouble shooting. The debug prints need to be enabled on the
	  kernel command line with 'debug-callthunks'.
	  Only enable this when you are debugging call thunks as this
	  creates a noticeable runtime overhead. If unsure say N.

config MITIGATION_IBPB_ENTRY
	bool "Enable IBPB on kernel entry"
	depends on CPU_SUP_AMD && X86_64
	default y
	help
	  Compile the kernel with support for the retbleed=ibpb mitigation.

config MITIGATION_IBRS_ENTRY
	bool "Enable IBRS on kernel entry"
	depends on CPU_SUP_INTEL && X86_64
	default y
	help
	  Compile the kernel with support for the spectre_v2=ibrs mitigation.
	  This mitigates both spectre_v2 and retbleed at great cost to
	  performance.

config MITIGATION_SRSO
	bool "Mitigate speculative RAS overflow on AMD"
	depends on CPU_SUP_AMD && X86_64 && MITIGATION_RETHUNK
	default y
	help
	  Enable the SRSO mitigation needed on AMD Zen1-4 machines.

config MITIGATION_SLS
	bool "Mitigate Straight-Line-Speculation"
	depends on CC_HAS_SLS && X86_64
	select OBJTOOL if HAVE_OBJTOOL
	default n
	help
	  Compile the kernel with straight-line-speculation options to guard
	  against straight line speculation. The kernel image might be slightly
	  larger.

config MITIGATION_GDS_FORCE
	bool "Force GDS Mitigation"
	depends on CPU_SUP_INTEL
	default n
	help
	  Gather Data Sampling (GDS) is a hardware vulnerability which allows
	  unprivileged speculative access to data which was previously stored in
	  vector registers.

	  This option is equivalent to setting gather_data_sampling=force on the
	  command line. The microcode mitigation is used if present, otherwise
	  AVX is disabled as a mitigation. On affected systems that are missing
	  the microcode any userspace code that unconditionally uses AVX will
	  break with this option set.

	  Setting this option on systems not vulnerable to GDS has no effect.

	  If in doubt, say N.

config MITIGATION_RFDS
	bool "RFDS Mitigation"
	depends on CPU_SUP_INTEL
	default y
	help
	  Enable mitigation for Register File Data Sampling (RFDS) by default.
	  RFDS is a hardware vulnerability which affects Intel Atom CPUs. It
	  allows unprivileged speculative access to stale data previously
	  stored in floating point, vector and integer registers.
	  See also <file:Documentation/admin-guide/hw-vuln/reg-file-data-sampling.rst>

endif

config ARCH_HAS_ADD_PAGES
	def_bool y
	depends on ARCH_ENABLE_MEMORY_HOTPLUG

menu "Power management and ACPI options"

config ARCH_HIBERNATION_HEADER
	def_bool y
	depends on HIBERNATION

source "kernel/power/Kconfig"

source "drivers/acpi/Kconfig"

config X86_APM_BOOT
	def_bool y
	depends on APM

menuconfig APM
	tristate "APM (Advanced Power Management) BIOS support"
	depends on X86_32 && PM_SLEEP
	help
	  APM is a BIOS specification for saving power using several different
	  techniques. This is mostly useful for battery powered laptops with
	  APM compliant BIOSes. If you say Y here, the system time will be
	  reset after a RESUME operation, the /proc/apm device will provide
	  battery status information, and user-space programs will receive
	  notification of APM "events" (e.g. battery status change).

	  If you select "Y" here, you can disable actual use of the APM
	  BIOS by passing the "apm=off" option to the kernel at boot time.

	  Note that the APM support is almost completely disabled for
	  machines with more than one CPU.

	  In order to use APM, you will need supporting software. For location
	  and more information, read <file:Documentation/power/apm-acpi.rst>
	  and the Battery Powered Linux mini-HOWTO, available from
	  <http://www.tldp.org/docs.html#howto>.

	  This driver does not spin down disk drives (see the hdparm(8)
	  manpage ("man 8 hdparm") for that), and it doesn't turn off
	  VESA-compliant "green" monitors.

	  This driver does not support the TI 4000M TravelMate and the ACER
	  486/DX4/75 because they don't have compliant BIOSes. Many "green"
	  desktop machines also don't have compliant BIOSes, and this driver
	  may cause those machines to panic during the boot phase.

	  Generally, if you don't have a battery in your machine, there isn't
	  much point in using this driver and you should say N. If you get
	  random kernel OOPSes or reboots that don't seem to be related to
	  anything, try disabling/enabling this option (or disabling/enabling
	  APM in your BIOS).

	  Some other things you should try when experiencing seemingly random,
	  "weird" problems:

	  1) make sure that you have enough swap space and that it is
	  enabled.
	  2) pass the "idle=poll" option to the kernel
	  3) switch on floating point emulation in the kernel and pass
	  the "no387" option to the kernel
	  4) pass the "floppy=nodma" option to the kernel
	  5) pass the "mem=4M" option to the kernel (thereby disabling
	  all but the first 4 MB of RAM)
	  6) make sure that the CPU is not over clocked.
	  7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/>
	  8) disable the cache from your BIOS settings
	  9) install a fan for the video card or exchange video RAM
	  10) install a better fan for the CPU
	  11) exchange RAM chips
	  12) exchange the motherboard.

	  To compile this driver as a module, choose M here: the
	  module will be called apm.

if APM

config APM_IGNORE_USER_SUSPEND
	bool "Ignore USER SUSPEND"
	help
	  This option will ignore USER SUSPEND requests. On machines with a
	  compliant APM BIOS, you want to say N. However, on the NEC Versa M
	  series notebooks, it is necessary to say Y because of a BIOS bug.

config APM_DO_ENABLE
	bool "Enable PM at boot time"
	help
	  Enable APM features at boot time. From page 36 of the APM BIOS
	  specification: "When disabled, the APM BIOS does not automatically
	  power manage devices, enter the Standby State, enter the Suspend
	  State, or take power saving steps in response to CPU Idle calls."
	  This driver will make CPU Idle calls when Linux is idle (unless this
	  feature is turned off -- see "Do CPU IDLE calls", below). This
	  should always save battery power, but more complicated APM features
	  will be dependent on your BIOS implementation. You may need to turn
	  this option off if your computer hangs at boot time when using APM
	  support, or if it beeps continuously instead of suspending. Turn
	  this off if you have a NEC UltraLite Versa 33/C or a Toshiba
	  T400CDT. This is off by default since most machines do fine without
	  this feature.

config APM_CPU_IDLE
	depends on CPU_IDLE
	bool "Make CPU Idle calls when idle"
	help
	  Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
	  On some machines, this can activate improved power savings, such as
	  a slowed CPU clock rate, when the machine is idle. These idle calls
	  are made after the idle loop has run for some length of time (e.g.,
	  333 mS). On some machines, this will cause a hang at boot time or
	  whenever the CPU becomes idle. (On machines with more than one CPU,
	  this option does nothing.)

config APM_DISPLAY_BLANK
	bool "Enable console blanking using APM"
	help
	  Enable console blanking using the APM. Some laptops can use this to
	  turn off the LCD backlight when the screen blanker of the Linux
	  virtual console blanks the screen. Note that this is only used by
	  the virtual console screen blanker, and won't turn off the backlight
	  when using the X Window system. This also doesn't have anything to
	  do with your VESA-compliant power-saving monitor. Further, this
	  option doesn't work for all laptops -- it might not turn off your
	  backlight at all, or it might print a lot of errors to the console,
	  especially if you are using gpm.

config APM_ALLOW_INTS
	bool "Allow interrupts during APM BIOS calls"
	help
	  Normally we disable external interrupts while we are making calls to
	  the APM BIOS as a measure to lessen the effects of a badly behaving
	  BIOS implementation.  The BIOS should reenable interrupts if it
	  needs to.  Unfortunately, some BIOSes do not -- especially those in
	  many of the newer IBM Thinkpads.  If you experience hangs when you
	  suspend, try setting this to Y.  Otherwise, say N.

endif # APM

source "drivers/cpufreq/Kconfig"

source "drivers/cpuidle/Kconfig"

source "drivers/idle/Kconfig"

endmenu

menu "Bus options (PCI etc.)"

choice
	prompt "PCI access mode"
	depends on X86_32 && PCI
	default PCI_GOANY
	help
	  On PCI systems, the BIOS can be used to detect the PCI devices and
	  determine their configuration. However, some old PCI motherboards
	  have BIOS bugs and may crash if this is done. Also, some embedded
	  PCI-based systems don't have any BIOS at all. Linux can also try to
	  detect the PCI hardware directly without using the BIOS.

	  With this option, you can specify how Linux should detect the
	  PCI devices. If you choose "BIOS", the BIOS will be used,
	  if you choose "Direct", the BIOS won't be used, and if you
	  choose "MMConfig", then PCI Express MMCONFIG will be used.
	  If you choose "Any", the kernel will try MMCONFIG, then the
	  direct access method and falls back to the BIOS if that doesn't
	  work. If unsure, go with the default, which is "Any".

config PCI_GOBIOS
	bool "BIOS"

config PCI_GOMMCONFIG
	bool "MMConfig"

config PCI_GODIRECT
	bool "Direct"

config PCI_GOOLPC
	bool "OLPC XO-1"
	depends on OLPC

config PCI_GOANY
	bool "Any"

endchoice

config PCI_BIOS
	def_bool y
	depends on X86_32 && PCI && (PCI_GOBIOS || PCI_GOANY)

# x86-64 doesn't support PCI BIOS access from long mode so always go direct.
config PCI_DIRECT
	def_bool y
	depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC || PCI_GOMMCONFIG))

config PCI_MMCONFIG
	bool "Support mmconfig PCI config space access" if X86_64
	default y
	depends on PCI && (ACPI || JAILHOUSE_GUEST)
	depends on X86_64 || (PCI_GOANY || PCI_GOMMCONFIG)

config PCI_OLPC
	def_bool y
	depends on PCI && OLPC && (PCI_GOOLPC || PCI_GOANY)

config PCI_XEN
	def_bool y
	depends on PCI && XEN

config MMCONF_FAM10H
	def_bool y
	depends on X86_64 && PCI_MMCONFIG && ACPI

config PCI_CNB20LE_QUIRK
	bool "Read CNB20LE Host Bridge Windows" if EXPERT
	depends on PCI
	help
	  Read the PCI windows out of the CNB20LE host bridge. This allows
	  PCI hotplug to work on systems with the CNB20LE chipset which do
	  not have ACPI.

	  There's no public spec for this chipset, and this functionality
	  is known to be incomplete.

	  You should say N unless you know you need this.

config ISA_BUS
	bool "ISA bus support on modern systems" if EXPERT
	help
	  Expose ISA bus device drivers and options available for selection and
	  configuration. Enable this option if your target machine has an ISA
	  bus. ISA is an older system, displaced by PCI and newer bus
	  architectures -- if your target machine is modern, it probably does
	  not have an ISA bus.

	  If unsure, say N.

# x86_64 have no ISA slots, but can have ISA-style DMA.
config ISA_DMA_API
	bool "ISA-style DMA support" if (X86_64 && EXPERT)
	default y
	help
	  Enables ISA-style DMA support for devices requiring such controllers.
	  If unsure, say Y.

if X86_32

config ISA
	bool "ISA support"
	help
	  Find out whether you have ISA slots on your motherboard.  ISA is the
	  name of a bus system, i.e. the way the CPU talks to the other stuff
	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
	  newer boards don't support it.  If you have ISA, say Y, otherwise N.

config SCx200
	tristate "NatSemi SCx200 support"
	help
	  This provides basic support for National Semiconductor's
	  (now AMD's) Geode processors.  The driver probes for the
	  PCI-IDs of several on-chip devices, so its a good dependency
	  for other scx200_* drivers.

	  If compiled as a module, the driver is named scx200.

config SCx200HR_TIMER
	tristate "NatSemi SCx200 27MHz High-Resolution Timer Support"
	depends on SCx200
	default y
	help
	  This driver provides a clocksource built upon the on-chip
	  27MHz high-resolution timer.  Its also a workaround for
	  NSC Geode SC-1100's buggy TSC, which loses time when the
	  processor goes idle (as is done by the scheduler).  The
	  other workaround is idle=poll boot option.

config OLPC
	bool "One Laptop Per Child support"
	depends on !X86_PAE
	select GPIOLIB
	select OF
	select OF_PROMTREE
	select IRQ_DOMAIN
	select OLPC_EC
	help
	  Add support for detecting the unique features of the OLPC
	  XO hardware.

config OLPC_XO1_PM
	bool "OLPC XO-1 Power Management"
	depends on OLPC && MFD_CS5535=y && PM_SLEEP
	help
	  Add support for poweroff and suspend of the OLPC XO-1 laptop.

config OLPC_XO1_RTC
	bool "OLPC XO-1 Real Time Clock"
	depends on OLPC_XO1_PM && RTC_DRV_CMOS
	help
	  Add support for the XO-1 real time clock, which can be used as a
	  programmable wakeup source.

config OLPC_XO1_SCI
	bool "OLPC XO-1 SCI extras"
	depends on OLPC && OLPC_XO1_PM && GPIO_CS5535=y
	depends on INPUT=y
	select POWER_SUPPLY
	help
	  Add support for SCI-based features of the OLPC XO-1 laptop:
	   - EC-driven system wakeups
	   - Power button
	   - Ebook switch
	   - Lid switch
	   - AC adapter status updates
	   - Battery status updates

config OLPC_XO15_SCI
	bool "OLPC XO-1.5 SCI extras"
	depends on OLPC && ACPI
	select POWER_SUPPLY
	help
	  Add support for SCI-based features of the OLPC XO-1.5 laptop:
	   - EC-driven system wakeups
	   - AC adapter status updates
	   - Battery status updates

config ALIX
	bool "PCEngines ALIX System Support (LED setup)"
	select GPIOLIB
	help
	  This option enables system support for the PCEngines ALIX.
	  At present this just sets up LEDs for GPIO control on
	  ALIX2/3/6 boards.  However, other system specific setup should
	  get added here.

	  Note: You must still enable the drivers for GPIO and LED support
	  (GPIO_CS5535 & LEDS_GPIO) to actually use the LEDs

	  Note: You have to set alix.force=1 for boards with Award BIOS.

config NET5501
	bool "Soekris Engineering net5501 System Support (LEDS, GPIO, etc)"
	select GPIOLIB
	help
	  This option enables system support for the Soekris Engineering net5501.

config GEOS
	bool "Traverse Technologies GEOS System Support (LEDS, GPIO, etc)"
	select GPIOLIB
	depends on DMI
	help
	  This option enables system support for the Traverse Technologies GEOS.

config TS5500
	bool "Technologic Systems TS-5500 platform support"
	depends on MELAN
	select CHECK_SIGNATURE
	select NEW_LEDS
	select LEDS_CLASS
	help
	  This option enables system support for the Technologic Systems TS-5500.

endif # X86_32

config AMD_NB
	def_bool y
	depends on CPU_SUP_AMD && PCI

endmenu

menu "Binary Emulations"

config IA32_EMULATION
	bool "IA32 Emulation"
	depends on X86_64
	select ARCH_WANT_OLD_COMPAT_IPC
	select BINFMT_ELF
	select COMPAT_OLD_SIGACTION
	help
	  Include code to run legacy 32-bit programs under a
	  64-bit kernel. You should likely turn this on, unless you're
	  100% sure that you don't have any 32-bit programs left.

config IA32_EMULATION_DEFAULT_DISABLED
	bool "IA32 emulation disabled by default"
	default n
	depends on IA32_EMULATION
	help
	  Make IA32 emulation disabled by default. This prevents loading 32-bit
	  processes and access to 32-bit syscalls. If unsure, leave it to its
	  default value.

config X86_X32_ABI
	bool "x32 ABI for 64-bit mode"
	depends on X86_64
	# llvm-objcopy does not convert x86_64 .note.gnu.property or
	# compressed debug sections to x86_x32 properly:
	# https://github.com/ClangBuiltLinux/linux/issues/514
	# https://github.com/ClangBuiltLinux/linux/issues/1141
	depends on $(success,$(OBJCOPY) --version | head -n1 | grep -qv llvm)
	help
	  Include code to run binaries for the x32 native 32-bit ABI
	  for 64-bit processors.  An x32 process gets access to the
	  full 64-bit register file and wide data path while leaving
	  pointers at 32 bits for smaller memory footprint.

config COMPAT_32
	def_bool y
	depends on IA32_EMULATION || X86_32
	select HAVE_UID16
	select OLD_SIGSUSPEND3

config COMPAT
	def_bool y
	depends on IA32_EMULATION || X86_X32_ABI

config COMPAT_FOR_U64_ALIGNMENT
	def_bool y
	depends on COMPAT

endmenu

config HAVE_ATOMIC_IOMAP
	def_bool y
	depends on X86_32

source "arch/x86/kvm/Kconfig"

source "arch/x86/Kconfig.assembler"