aboutsummaryrefslogtreecommitdiff
path: root/target/s390x/cpu_models.c
blob: 1434d153154bf29533d6ae4d232e3e771d75adc7 (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
/*
 * CPU models for s390x
 *
 * Copyright 2016 IBM Corp.
 *
 * Author(s): David Hildenbrand <dahi@linux.vnet.ibm.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or (at
 * your option) any later version. See the COPYING file in the top-level
 * directory.
 */

#include "qemu/osdep.h"
#include "cpu.h"
#include "gen-features.h"
#include "qapi/error.h"
#include "qapi/visitor.h"
#include "qemu/error-report.h"
#include "qapi/qmp/qerror.h"
#include "qapi/qobject-input-visitor.h"
#include "qapi/qmp/qbool.h"
#ifndef CONFIG_USER_ONLY
#include "sysemu/arch_init.h"
#endif

#define CPUDEF_INIT(_type, _gen, _ec_ga, _mha_pow, _hmfai, _name, _desc) \
    {                                                                    \
        .name = _name,                                                   \
        .type = _type,                                                   \
        .gen = _gen,                                                     \
        .ec_ga = _ec_ga,                                                 \
        .mha_pow = _mha_pow,                                             \
        .hmfai = _hmfai,                                                 \
        .desc = _desc,                                                   \
        .base_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _BASE },  \
        .default_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _DEFAULT },  \
        .full_init = { S390_FEAT_LIST_GEN ## _gen ## _GA ## _ec_ga ## _FULL },  \
    }

/*
 * CPU definiton list in order of release. For now, base features of a
 * following release are always a subset of base features of the previous
 * release. Same is correct for the other feature sets.
 * A BC release always follows the corresponding EC release.
 */
static S390CPUDef s390_cpu_defs[] = {
    CPUDEF_INIT(0x2064, 7, 1, 38, 0x00000000U, "z900", "IBM zSeries 900 GA1"),
    CPUDEF_INIT(0x2064, 7, 2, 38, 0x00000000U, "z900.2", "IBM zSeries 900 GA2"),
    CPUDEF_INIT(0x2064, 7, 3, 38, 0x00000000U, "z900.3", "IBM zSeries 900 GA3"),
    CPUDEF_INIT(0x2066, 7, 3, 38, 0x00000000U, "z800", "IBM zSeries 800 GA1"),
    CPUDEF_INIT(0x2084, 8, 1, 38, 0x00000000U, "z990", "IBM zSeries 990 GA1"),
    CPUDEF_INIT(0x2084, 8, 2, 38, 0x00000000U, "z990.2", "IBM zSeries 990 GA2"),
    CPUDEF_INIT(0x2084, 8, 3, 38, 0x00000000U, "z990.3", "IBM zSeries 990 GA3"),
    CPUDEF_INIT(0x2086, 8, 3, 38, 0x00000000U, "z890", "IBM zSeries 880 GA1"),
    CPUDEF_INIT(0x2084, 8, 4, 38, 0x00000000U, "z990.4", "IBM zSeries 990 GA4"),
    CPUDEF_INIT(0x2086, 8, 4, 38, 0x00000000U, "z890.2", "IBM zSeries 880 GA2"),
    CPUDEF_INIT(0x2084, 8, 5, 38, 0x00000000U, "z990.5", "IBM zSeries 990 GA5"),
    CPUDEF_INIT(0x2086, 8, 5, 38, 0x00000000U, "z890.3", "IBM zSeries 880 GA3"),
    CPUDEF_INIT(0x2094, 9, 1, 40, 0x00000000U, "z9EC", "IBM System z9 EC GA1"),
    CPUDEF_INIT(0x2094, 9, 2, 40, 0x00000000U, "z9EC.2", "IBM System z9 EC GA2"),
    CPUDEF_INIT(0x2096, 9, 2, 40, 0x00000000U, "z9BC", "IBM System z9 BC GA1"),
    CPUDEF_INIT(0x2094, 9, 3, 40, 0x00000000U, "z9EC.3", "IBM System z9 EC GA3"),
    CPUDEF_INIT(0x2096, 9, 3, 40, 0x00000000U, "z9BC.2", "IBM System z9 BC GA2"),
    CPUDEF_INIT(0x2097, 10, 1, 43, 0x00000000U, "z10EC", "IBM System z10 EC GA1"),
    CPUDEF_INIT(0x2097, 10, 2, 43, 0x00000000U, "z10EC.2", "IBM System z10 EC GA2"),
    CPUDEF_INIT(0x2098, 10, 2, 43, 0x00000000U, "z10BC", "IBM System z10 BC GA1"),
    CPUDEF_INIT(0x2097, 10, 3, 43, 0x00000000U, "z10EC.3", "IBM System z10 EC GA3"),
    CPUDEF_INIT(0x2098, 10, 3, 43, 0x00000000U, "z10BC.2", "IBM System z10 BC GA2"),
    CPUDEF_INIT(0x2817, 11, 1, 44, 0x08000000U, "z196", "IBM zEnterprise 196 GA1"),
    CPUDEF_INIT(0x2817, 11, 2, 44, 0x08000000U, "z196.2", "IBM zEnterprise 196 GA2"),
    CPUDEF_INIT(0x2818, 11, 2, 44, 0x08000000U, "z114", "IBM zEnterprise 114 GA1"),
    CPUDEF_INIT(0x2827, 12, 1, 44, 0x08000000U, "zEC12", "IBM zEnterprise EC12 GA1"),
    CPUDEF_INIT(0x2827, 12, 2, 44, 0x08000000U, "zEC12.2", "IBM zEnterprise EC12 GA2"),
    CPUDEF_INIT(0x2828, 12, 2, 44, 0x08000000U, "zBC12", "IBM zEnterprise BC12 GA1"),
    CPUDEF_INIT(0x2964, 13, 1, 47, 0x08000000U, "z13", "IBM z13 GA1"),
    CPUDEF_INIT(0x2964, 13, 2, 47, 0x08000000U, "z13.2", "IBM z13 GA2"),
    CPUDEF_INIT(0x2965, 13, 2, 47, 0x08000000U, "z13s", "IBM z13s GA1"),
};

uint32_t s390_get_hmfai(void)
{
    static S390CPU *cpu;

    if (!cpu) {
        cpu = S390_CPU(qemu_get_cpu(0));
    }

    if (!cpu || !cpu->model) {
        return 0;
    }
    return cpu->model->def->hmfai;
}

uint8_t s390_get_mha_pow(void)
{
    static S390CPU *cpu;

    if (!cpu) {
        cpu = S390_CPU(qemu_get_cpu(0));
    }

    if (!cpu || !cpu->model) {
        return 0;
    }
    return cpu->model->def->mha_pow;
}

uint32_t s390_get_ibc_val(void)
{
    uint16_t unblocked_ibc, lowest_ibc;
    static S390CPU *cpu;

    if (!cpu) {
        cpu = S390_CPU(qemu_get_cpu(0));
    }

    if (!cpu || !cpu->model) {
        return 0;
    }
    unblocked_ibc = s390_ibc_from_cpu_model(cpu->model);
    lowest_ibc = cpu->model->lowest_ibc;
    /* the lowest_ibc always has to be <= unblocked_ibc */
    if (!lowest_ibc || lowest_ibc > unblocked_ibc) {
        return 0;
    }
    return ((uint32_t) lowest_ibc << 16) | unblocked_ibc;
}

void s390_get_feat_block(S390FeatType type, uint8_t *data)
{
    static S390CPU *cpu;

    if (!cpu) {
        cpu = S390_CPU(qemu_get_cpu(0));
    }

    if (!cpu || !cpu->model) {
        return;
    }
    s390_fill_feat_block(cpu->model->features, type, data);
}

bool s390_has_feat(S390Feat feat)
{
    static S390CPU *cpu;

    if (!cpu) {
        cpu = S390_CPU(qemu_get_cpu(0));
    }

    if (!cpu || !cpu->model) {
#ifdef CONFIG_KVM
        if (kvm_enabled()) {
            if (feat == S390_FEAT_VECTOR) {
                return kvm_check_extension(kvm_state,
                                           KVM_CAP_S390_VECTOR_REGISTERS);
            }
            if (feat == S390_FEAT_RUNTIME_INSTRUMENTATION) {
                return kvm_s390_get_ri();
            }
            if (feat == S390_FEAT_MSA_EXT_3) {
                return true;
            }
        }
#endif
        return 0;
    }
    return test_bit(feat, cpu->model->features);
}

uint8_t s390_get_gen_for_cpu_type(uint16_t type)
{
    int i;

    for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
        if (s390_cpu_defs[i].type == type) {
            return s390_cpu_defs[i].gen;
        }
    }
    return 0;
}

const S390CPUDef *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga,
                                    S390FeatBitmap features)
{
    const S390CPUDef *last_compatible = NULL;
    int i;

    if (!gen) {
        ec_ga = 0;
    }
    if (!gen && type) {
        gen = s390_get_gen_for_cpu_type(type);
    }

    for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
        const S390CPUDef *def = &s390_cpu_defs[i];
        S390FeatBitmap missing;

        /* don't even try newer generations if we know the generation */
        if (gen) {
            if (def->gen > gen) {
                break;
            } else if (def->gen == gen && ec_ga && def->ec_ga > ec_ga) {
                break;
            }
        }

        if (features) {
            /* see if the model satisfies the minimum features */
            bitmap_andnot(missing, def->base_feat, features, S390_FEAT_MAX);
            if (!bitmap_empty(missing, S390_FEAT_MAX)) {
                break;
            }
        }

        /* stop the search if we found the exact model */
        if (def->type == type && def->ec_ga == ec_ga) {
            return def;
        }
        last_compatible = def;
    }
    return last_compatible;
}

struct S390PrintCpuListInfo {
    FILE *f;
    fprintf_function print;
};

static void print_cpu_model_list(ObjectClass *klass, void *opaque)
{
    struct S390PrintCpuListInfo *info = opaque;
    S390CPUClass *scc = S390_CPU_CLASS(klass);
    char *name = g_strdup(object_class_get_name(klass));
    const char *details = "";

    if (scc->is_static) {
        details = "(static, migration-safe)";
    } else if (scc->is_migration_safe) {
        details = "(migration-safe)";
    }

    /* strip off the -s390-cpu */
    g_strrstr(name, "-" TYPE_S390_CPU)[0] = 0;
    (*info->print)(info->f, "s390 %-15s %-35s %s\n", name, scc->desc,
                   details);
    g_free(name);
}

void s390_cpu_list(FILE *f, fprintf_function print)
{
    struct S390PrintCpuListInfo info = {
        .f = f,
        .print = print,
    };
    S390FeatGroup group;
    S390Feat feat;

    object_class_foreach(print_cpu_model_list, TYPE_S390_CPU, false, &info);

    (*print)(f, "\nRecognized feature flags:\n");
    for (feat = 0; feat < S390_FEAT_MAX; feat++) {
        const S390FeatDef *def = s390_feat_def(feat);

        (*print)(f, "%-20s %-50s\n", def->name, def->desc);
    }

    (*print)(f, "\nRecognized feature groups:\n");
    for (group = 0; group < S390_FEAT_GROUP_MAX; group++) {
        const S390FeatGroupDef *def = s390_feat_group_def(group);

        (*print)(f, "%-20s %-50s\n", def->name, def->desc);
    }
}

#ifndef CONFIG_USER_ONLY
static void create_cpu_model_list(ObjectClass *klass, void *opaque)
{
    CpuDefinitionInfoList **cpu_list = opaque;
    CpuDefinitionInfoList *entry;
    CpuDefinitionInfo *info;
    char *name = g_strdup(object_class_get_name(klass));
    S390CPUClass *scc = S390_CPU_CLASS(klass);

    /* strip off the -s390-cpu */
    g_strrstr(name, "-" TYPE_S390_CPU)[0] = 0;
    info = g_malloc0(sizeof(*info));
    info->name = name;
    info->has_migration_safe = true;
    info->migration_safe = scc->is_migration_safe;
    info->q_static = scc->is_static;
    info->q_typename = g_strdup(object_class_get_name(klass));


    entry = g_malloc0(sizeof(*entry));
    entry->value = info;
    entry->next = *cpu_list;
    *cpu_list = entry;
}

CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp)
{
    CpuDefinitionInfoList *list = NULL;

    object_class_foreach(create_cpu_model_list, TYPE_S390_CPU, false, &list);

    return list;
}

static void cpu_model_from_info(S390CPUModel *model, const CpuModelInfo *info,
                                Error **errp)
{
    const QDict *qdict = NULL;
    const QDictEntry *e;
    Visitor *visitor;
    ObjectClass *oc;
    S390CPU *cpu;
    Object *obj;

    if (info->props) {
        qdict = qobject_to_qdict(info->props);
        if (!qdict) {
            error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
            return;
        }
    }

    oc = cpu_class_by_name(TYPE_S390_CPU, info->name);
    if (!oc) {
        error_setg(errp, "The CPU definition \'%s\' is unknown.", info->name);
        return;
    }
    if (S390_CPU_CLASS(oc)->kvm_required && !kvm_enabled()) {
        error_setg(errp, "The CPU definition '%s' requires KVM", info->name);
        return;
    }
    obj = object_new(object_class_get_name(oc));
    cpu = S390_CPU(obj);

    if (!cpu->model) {
        error_setg(errp, "Details about the host CPU model are not available, "
                         "it cannot be used.");
        object_unref(obj);
        return;
    }

    if (qdict) {
        visitor = qobject_input_visitor_new(info->props);
        visit_start_struct(visitor, NULL, NULL, 0, errp);
        if (*errp) {
            object_unref(obj);
            return;
        }
        for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) {
            object_property_set(obj, visitor, e->key, errp);
            if (*errp) {
                break;
            }
        }
        if (!*errp) {
            visit_check_struct(visitor, errp);
        }
        visit_end_struct(visitor, NULL);
        visit_free(visitor);
        if (*errp) {
            object_unref(obj);
            return;
        }
    }

    /* copy the model and throw the cpu away */
    memcpy(model, cpu->model, sizeof(*model));
    object_unref(obj);
}

static void qdict_add_disabled_feat(const char *name, void *opaque)
{
    qdict_put((QDict *) opaque, name, qbool_from_bool(false));
}

static void qdict_add_enabled_feat(const char *name, void *opaque)
{
    qdict_put((QDict *) opaque, name, qbool_from_bool(true));
}

/* convert S390CPUDef into a static CpuModelInfo */
static void cpu_info_from_model(CpuModelInfo *info, const S390CPUModel *model,
                                bool delta_changes)
{
    QDict *qdict = qdict_new();
    S390FeatBitmap bitmap;

    /* always fallback to the static base model */
    info->name = g_strdup_printf("%s-base", model->def->name);

    if (delta_changes) {
        /* features deleted from the base feature set */
        bitmap_andnot(bitmap, model->def->base_feat, model->features,
                      S390_FEAT_MAX);
        if (!bitmap_empty(bitmap, S390_FEAT_MAX)) {
            s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_disabled_feat);
        }

        /* features added to the base feature set */
        bitmap_andnot(bitmap, model->features, model->def->base_feat,
                      S390_FEAT_MAX);
        if (!bitmap_empty(bitmap, S390_FEAT_MAX)) {
            s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_enabled_feat);
        }
    } else {
        /* expand all features */
        s390_feat_bitmap_to_ascii(model->features, qdict,
                                  qdict_add_enabled_feat);
        bitmap_complement(bitmap, model->features, S390_FEAT_MAX);
        s390_feat_bitmap_to_ascii(bitmap, qdict, qdict_add_disabled_feat);
    }

    if (!qdict_size(qdict)) {
        QDECREF(qdict);
    } else {
        info->props = QOBJECT(qdict);
        info->has_props = true;
    }
}

CpuModelExpansionInfo *arch_query_cpu_model_expansion(CpuModelExpansionType type,
                                                      CpuModelInfo *model,
                                                      Error **errp)
{
    CpuModelExpansionInfo *expansion_info = NULL;
    S390CPUModel s390_model;
    bool delta_changes = false;

    /* convert it to our internal representation */
    cpu_model_from_info(&s390_model, model, errp);
    if (*errp) {
        return NULL;
    }

    if (type == CPU_MODEL_EXPANSION_TYPE_STATIC) {
        delta_changes = true;
    } else if (type != CPU_MODEL_EXPANSION_TYPE_FULL) {
        error_setg(errp, "The requested expansion type is not supported.");
        return NULL;
    }

    /* convert it back to a static representation */
    expansion_info = g_malloc0(sizeof(*expansion_info));
    expansion_info->model = g_malloc0(sizeof(*expansion_info->model));
    cpu_info_from_model(expansion_info->model, &s390_model, delta_changes);
    return expansion_info;
}

static void list_add_feat(const char *name, void *opaque)
{
    strList **last = (strList **) opaque;
    strList *entry;

    entry = g_malloc0(sizeof(*entry));
    entry->value = g_strdup(name);
    entry->next = *last;
    *last = entry;
}

CpuModelCompareInfo *arch_query_cpu_model_comparison(CpuModelInfo *infoa,
                                                     CpuModelInfo *infob,
                                                     Error **errp)
{
    CpuModelCompareResult feat_result, gen_result;
    CpuModelCompareInfo *compare_info;
    S390FeatBitmap missing, added;
    S390CPUModel modela, modelb;

    /* convert both models to our internal representation */
    cpu_model_from_info(&modela, infoa, errp);
    if (*errp) {
        return NULL;
    }
    cpu_model_from_info(&modelb, infob, errp);
    if (*errp) {
        return NULL;
    }
    compare_info = g_malloc0(sizeof(*compare_info));

    /* check the cpu generation and ga level */
    if (modela.def->gen == modelb.def->gen) {
        if (modela.def->ec_ga == modelb.def->ec_ga) {
            /* ec and corresponding bc are identical */
            gen_result = CPU_MODEL_COMPARE_RESULT_IDENTICAL;
        } else if (modela.def->ec_ga < modelb.def->ec_ga) {
            gen_result = CPU_MODEL_COMPARE_RESULT_SUBSET;
        } else {
            gen_result = CPU_MODEL_COMPARE_RESULT_SUPERSET;
        }
    } else if (modela.def->gen < modelb.def->gen) {
        gen_result = CPU_MODEL_COMPARE_RESULT_SUBSET;
    } else {
        gen_result = CPU_MODEL_COMPARE_RESULT_SUPERSET;
    }
    if (gen_result != CPU_MODEL_COMPARE_RESULT_IDENTICAL) {
        /* both models cannot be made identical */
        list_add_feat("type", &compare_info->responsible_properties);
    }

    /* check the feature set */
    if (bitmap_equal(modela.features, modelb.features, S390_FEAT_MAX)) {
        feat_result = CPU_MODEL_COMPARE_RESULT_IDENTICAL;
    } else {
        bitmap_andnot(missing, modela.features, modelb.features, S390_FEAT_MAX);
        s390_feat_bitmap_to_ascii(missing,
                                  &compare_info->responsible_properties,
                                  list_add_feat);
        bitmap_andnot(added, modelb.features, modela.features, S390_FEAT_MAX);
        s390_feat_bitmap_to_ascii(added, &compare_info->responsible_properties,
                                  list_add_feat);
        if (bitmap_empty(missing, S390_FEAT_MAX)) {
            feat_result = CPU_MODEL_COMPARE_RESULT_SUBSET;
        } else if (bitmap_empty(added, S390_FEAT_MAX)) {
            feat_result = CPU_MODEL_COMPARE_RESULT_SUPERSET;
        } else {
            feat_result = CPU_MODEL_COMPARE_RESULT_INCOMPATIBLE;
        }
    }

    /* combine the results */
    if (gen_result == feat_result) {
        compare_info->result = gen_result;
    } else if (feat_result == CPU_MODEL_COMPARE_RESULT_IDENTICAL) {
        compare_info->result = gen_result;
    } else if (gen_result == CPU_MODEL_COMPARE_RESULT_IDENTICAL) {
        compare_info->result = feat_result;
    } else {
        compare_info->result = CPU_MODEL_COMPARE_RESULT_INCOMPATIBLE;
    }
    return compare_info;
}

CpuModelBaselineInfo *arch_query_cpu_model_baseline(CpuModelInfo *infoa,
                                                    CpuModelInfo *infob,
                                                    Error **errp)
{
    CpuModelBaselineInfo *baseline_info;
    S390CPUModel modela, modelb, model;
    uint16_t cpu_type;
    uint8_t max_gen_ga;
    uint8_t max_gen;

    /* convert both models to our internal representation */
    cpu_model_from_info(&modela, infoa, errp);
    if (*errp) {
        return NULL;
    }

    cpu_model_from_info(&modelb, infob, errp);
    if (*errp) {
        return NULL;
    }

    /* features both models support */
    bitmap_and(model.features, modela.features, modelb.features, S390_FEAT_MAX);

    /* detect the maximum model not regarding features */
    if (modela.def->gen == modelb.def->gen) {
        if (modela.def->type == modelb.def->type) {
            cpu_type = modela.def->type;
        } else {
            cpu_type = 0;
        }
        max_gen = modela.def->gen;
        max_gen_ga = MIN(modela.def->ec_ga, modelb.def->ec_ga);
    } else if (modela.def->gen > modelb.def->gen) {
        cpu_type = modelb.def->type;
        max_gen = modelb.def->gen;
        max_gen_ga = modelb.def->ec_ga;
    } else {
        cpu_type = modela.def->type;
        max_gen = modela.def->gen;
        max_gen_ga = modela.def->ec_ga;
    }

    model.def = s390_find_cpu_def(cpu_type, max_gen, max_gen_ga,
                                  model.features);
    /* strip off features not part of the max model */
    bitmap_and(model.features, model.features, model.def->full_feat,
               S390_FEAT_MAX);

    baseline_info = g_malloc0(sizeof(*baseline_info));
    baseline_info->model = g_malloc0(sizeof(*baseline_info->model));
    cpu_info_from_model(baseline_info->model, &model, true);
    return baseline_info;
}
#endif

static void check_consistency(const S390CPUModel *model)
{
    static int dep[][2] = {
        { S390_FEAT_IPTE_RANGE, S390_FEAT_DAT_ENH },
        { S390_FEAT_IDTE_SEGMENT, S390_FEAT_DAT_ENH },
        { S390_FEAT_IDTE_REGION, S390_FEAT_DAT_ENH },
        { S390_FEAT_IDTE_REGION, S390_FEAT_IDTE_SEGMENT },
        { S390_FEAT_LOCAL_TLB_CLEARING, S390_FEAT_DAT_ENH},
        { S390_FEAT_LONG_DISPLACEMENT_FAST, S390_FEAT_LONG_DISPLACEMENT },
        { S390_FEAT_DFP_FAST, S390_FEAT_DFP },
        { S390_FEAT_TRANSACTIONAL_EXE, S390_FEAT_STFLE_49 },
        { S390_FEAT_EDAT_2, S390_FEAT_EDAT},
        { S390_FEAT_MSA_EXT_5, S390_FEAT_KIMD_SHA_512 },
        { S390_FEAT_MSA_EXT_5, S390_FEAT_KLMD_SHA_512 },
        { S390_FEAT_MSA_EXT_4, S390_FEAT_MSA_EXT_3 },
        { S390_FEAT_SIE_CMMA, S390_FEAT_CMM },
        { S390_FEAT_SIE_CMMA, S390_FEAT_SIE_GSLS },
        { S390_FEAT_SIE_PFMFI, S390_FEAT_EDAT },
    };
    int i;

    for (i = 0; i < ARRAY_SIZE(dep); i++) {
        if (test_bit(dep[i][0], model->features) &&
            !test_bit(dep[i][1], model->features)) {
            error_report("Warning: \'%s\' requires \'%s\'.",
                         s390_feat_def(dep[i][0])->name,
                         s390_feat_def(dep[i][1])->name);
        }
    }
}

static void error_prepend_missing_feat(const char *name, void *opaque)
{
    error_prepend((Error **) opaque, "%s ", name);
}

static void check_compatibility(const S390CPUModel *max_model,
                                const S390CPUModel *model, Error **errp)
{
    S390FeatBitmap missing;

    if (model->def->gen > max_model->def->gen) {
        error_setg(errp, "Selected CPU generation is too new. Maximum "
                   "supported model in the configuration: \'%s\'",
                   max_model->def->name);
        return;
    } else if (model->def->gen == max_model->def->gen &&
               model->def->ec_ga > max_model->def->ec_ga) {
        error_setg(errp, "Selected CPU GA level is too new. Maximum "
                   "supported model in the configuration: \'%s\'",
                   max_model->def->name);
        return;
    }

    /* detect the missing features to properly report them */
    bitmap_andnot(missing, model->features, max_model->features, S390_FEAT_MAX);
    if (bitmap_empty(missing, S390_FEAT_MAX)) {
        return;
    }

    error_setg(errp, " ");
    s390_feat_bitmap_to_ascii(missing, errp, error_prepend_missing_feat);
    error_prepend(errp, "Some features requested in the CPU model are not "
                  "available in the configuration: ");
}

static S390CPUModel *get_max_cpu_model(Error **errp)
{
    static S390CPUModel max_model;
    static bool cached;

    if (cached) {
        return &max_model;
    }

    if (kvm_enabled()) {
        kvm_s390_get_host_cpu_model(&max_model, errp);
    } else {
        /* TCG emulates a z900 */
        max_model.def = &s390_cpu_defs[0];
        bitmap_copy(max_model.features, max_model.def->default_feat,
                    S390_FEAT_MAX);
    }
    if (!*errp) {
        cached = true;
        return &max_model;
    }
    return NULL;
}

static inline void apply_cpu_model(const S390CPUModel *model, Error **errp)
{
#ifndef CONFIG_USER_ONLY
    static S390CPUModel applied_model;
    static bool applied;

    /*
     * We have the same model for all VCPUs. KVM can only be configured before
     * any VCPUs are defined in KVM.
     */
    if (applied) {
        if (model && memcmp(&applied_model, model, sizeof(S390CPUModel))) {
            error_setg(errp, "Mixed CPU models are not supported on s390x.");
        }
        return;
    }

    if (kvm_enabled()) {
        kvm_s390_apply_cpu_model(model, errp);
    } else if (model) {
        /* FIXME TCG - use data for stdip/stfl */
    }

    if (!*errp) {
        applied = true;
        if (model) {
            applied_model = *model;
        }
    }
#endif
}

void s390_realize_cpu_model(CPUState *cs, Error **errp)
{
    S390CPUClass *xcc = S390_CPU_GET_CLASS(cs);
    S390CPU *cpu = S390_CPU(cs);
    const S390CPUModel *max_model;

    if (xcc->kvm_required && !kvm_enabled()) {
        error_setg(errp, "CPU definition requires KVM");
        return;
    }

    if (!cpu->model) {
        /* no host model support -> perform compatibility stuff */
        apply_cpu_model(NULL, errp);
        return;
    }

    max_model = get_max_cpu_model(errp);
    if (*errp) {
        error_prepend(errp, "CPU models are not available: ");
        return;
    }

    /* copy over properties that can vary */
    cpu->model->lowest_ibc = max_model->lowest_ibc;
    cpu->model->cpu_id = max_model->cpu_id;
    cpu->model->cpu_ver = max_model->cpu_ver;

    check_consistency(cpu->model);
    check_compatibility(max_model, cpu->model, errp);
    if (*errp) {
        return;
    }

    apply_cpu_model(cpu->model, errp);
}

static void get_feature(Object *obj, Visitor *v, const char *name,
                        void *opaque, Error **errp)
{
    S390Feat feat = (S390Feat) opaque;
    S390CPU *cpu = S390_CPU(obj);
    bool value;

    if (!cpu->model) {
        error_setg(errp, "Details about the host CPU model are not available, "
                         "features cannot be queried.");
        return;
    }

    value = test_bit(feat, cpu->model->features);
    visit_type_bool(v, name, &value, errp);
}

static void set_feature(Object *obj, Visitor *v, const char *name,
                        void *opaque, Error **errp)
{
    S390Feat feat = (S390Feat) opaque;
    DeviceState *dev = DEVICE(obj);
    S390CPU *cpu = S390_CPU(obj);
    bool value;

    if (dev->realized) {
        error_setg(errp, "Attempt to set property '%s' on '%s' after "
                   "it was realized", name, object_get_typename(obj));
        return;
    } else if (!cpu->model) {
        error_setg(errp, "Details about the host CPU model are not available, "
                         "features cannot be changed.");
        return;
    }

    visit_type_bool(v, name, &value, errp);
    if (*errp) {
        return;
    }
    if (value) {
        if (!test_bit(feat, cpu->model->def->full_feat)) {
            error_setg(errp, "Feature '%s' is not available for CPU model '%s',"
                       " it was introduced with later models.",
                       name, cpu->model->def->name);
            return;
        }
        set_bit(feat, cpu->model->features);
    } else {
        clear_bit(feat, cpu->model->features);
    }
}

static void get_feature_group(Object *obj, Visitor *v, const char *name,
                              void *opaque, Error **errp)
{
    S390FeatGroup group = (S390FeatGroup) opaque;
    const S390FeatGroupDef *def = s390_feat_group_def(group);
    S390CPU *cpu = S390_CPU(obj);
    S390FeatBitmap tmp;
    bool value;

    if (!cpu->model) {
        error_setg(errp, "Details about the host CPU model are not available, "
                         "features cannot be queried.");
        return;
    }

    /* a group is enabled if all features are enabled */
    bitmap_and(tmp, cpu->model->features, def->feat, S390_FEAT_MAX);
    value = bitmap_equal(tmp, def->feat, S390_FEAT_MAX);
    visit_type_bool(v, name, &value, errp);
}

static void set_feature_group(Object *obj, Visitor *v, const char *name,
                              void *opaque, Error **errp)
{
    S390FeatGroup group = (S390FeatGroup) opaque;
    const S390FeatGroupDef *def = s390_feat_group_def(group);
    DeviceState *dev = DEVICE(obj);
    S390CPU *cpu = S390_CPU(obj);
    bool value;

    if (dev->realized) {
        error_setg(errp, "Attempt to set property '%s' on '%s' after "
                   "it was realized", name, object_get_typename(obj));
        return;
    } else if (!cpu->model) {
        error_setg(errp, "Details about the host CPU model are not available, "
                         "features cannot be changed.");
        return;
    }

    visit_type_bool(v, name, &value, errp);
    if (*errp) {
        return;
    }
    if (value) {
        /* groups are added in one shot, so an intersect is sufficient */
        if (!bitmap_intersects(def->feat, cpu->model->def->full_feat,
                               S390_FEAT_MAX)) {
            error_setg(errp, "Group '%s' is not available for CPU model '%s',"
                       " it was introduced with later models.",
                       name, cpu->model->def->name);
            return;
        }
        bitmap_or(cpu->model->features, cpu->model->features, def->feat,
                  S390_FEAT_MAX);
    } else {
        bitmap_andnot(cpu->model->features, cpu->model->features, def->feat,
                      S390_FEAT_MAX);
    }
}

void s390_cpu_model_register_props(Object *obj)
{
    S390FeatGroup group;
    S390Feat feat;

    for (feat = 0; feat < S390_FEAT_MAX; feat++) {
        const S390FeatDef *def = s390_feat_def(feat);
        object_property_add(obj, def->name, "bool", get_feature,
                            set_feature, NULL, (void *) feat, NULL);
        object_property_set_description(obj, def->name, def->desc , NULL);
    }
    for (group = 0; group < S390_FEAT_GROUP_MAX; group++) {
        const S390FeatGroupDef *def = s390_feat_group_def(group);
        object_property_add(obj, def->name, "bool", get_feature_group,
                            set_feature_group, NULL, (void *) group, NULL);
        object_property_set_description(obj, def->name, def->desc , NULL);
    }
}

static void s390_cpu_model_initfn(Object *obj)
{
    S390CPU *cpu = S390_CPU(obj);
    S390CPUClass *xcc = S390_CPU_GET_CLASS(cpu);

    cpu->model = g_malloc0(sizeof(*cpu->model));
    /* copy the model, so we can modify it */
    cpu->model->def = xcc->cpu_def;
    if (xcc->is_static) {
        /* base model - features will never change */
        bitmap_copy(cpu->model->features, cpu->model->def->base_feat,
                    S390_FEAT_MAX);
    } else {
        /* latest model - features can change */
        bitmap_copy(cpu->model->features,
                    cpu->model->def->default_feat, S390_FEAT_MAX);
    }
}

#ifdef CONFIG_KVM
static void s390_host_cpu_model_initfn(Object *obj)
{
    S390CPU *cpu = S390_CPU(obj);
    Error *err = NULL;

    if (!kvm_enabled() || !kvm_s390_cpu_models_supported()) {
        return;
    }

    cpu->model = g_malloc0(sizeof(*cpu->model));
    kvm_s390_get_host_cpu_model(cpu->model, &err);
    if (err) {
        error_report_err(err);
        g_free(cpu->model);
        /* fallback to unsupported cpu models */
        cpu->model = NULL;
    }
}
#endif

static void s390_qemu_cpu_model_initfn(Object *obj)
{
    S390CPU *cpu = S390_CPU(obj);

    cpu->model = g_malloc0(sizeof(*cpu->model));
    /* TCG emulates a z900 */
    cpu->model->def = &s390_cpu_defs[0];
    bitmap_copy(cpu->model->features, cpu->model->def->default_feat,
                S390_FEAT_MAX);
}

static void s390_cpu_model_finalize(Object *obj)
{
    S390CPU *cpu = S390_CPU(obj);

    g_free(cpu->model);
    cpu->model = NULL;
}

static bool get_is_migration_safe(Object *obj, Error **errp)
{
    return S390_CPU_GET_CLASS(obj)->is_migration_safe;
}

static bool get_is_static(Object *obj, Error **errp)
{
    return S390_CPU_GET_CLASS(obj)->is_static;
}

static char *get_description(Object *obj, Error **errp)
{
    return g_strdup(S390_CPU_GET_CLASS(obj)->desc);
}

void s390_cpu_model_class_register_props(ObjectClass *oc)
{
    object_class_property_add_bool(oc, "migration-safe", get_is_migration_safe,
                                   NULL, NULL);
    object_class_property_add_bool(oc, "static", get_is_static,
                                   NULL, NULL);
    object_class_property_add_str(oc, "description", get_description, NULL,
                                  NULL);
}

#ifdef CONFIG_KVM
static void s390_host_cpu_model_class_init(ObjectClass *oc, void *data)
{
    S390CPUClass *xcc = S390_CPU_CLASS(oc);

    xcc->kvm_required = true;
    xcc->desc = "KVM only: All recognized features";
}
#endif

static void s390_base_cpu_model_class_init(ObjectClass *oc, void *data)
{
    S390CPUClass *xcc = S390_CPU_CLASS(oc);

    /* all base models are migration safe */
    xcc->cpu_def = (const S390CPUDef *) data;
    xcc->is_migration_safe = true;
    xcc->is_static = true;
    xcc->desc = xcc->cpu_def->desc;
}

static void s390_cpu_model_class_init(ObjectClass *oc, void *data)
{
    S390CPUClass *xcc = S390_CPU_CLASS(oc);

    /* model that can change between QEMU versions */
    xcc->cpu_def = (const S390CPUDef *) data;
    xcc->is_migration_safe = true;
    xcc->desc = xcc->cpu_def->desc;
}

static void s390_qemu_cpu_model_class_init(ObjectClass *oc, void *data)
{
    S390CPUClass *xcc = S390_CPU_CLASS(oc);

    xcc->is_migration_safe = true;
    xcc->desc = g_strdup_printf("QEMU Virtual CPU version %s",
                                qemu_hw_version());
}

#define S390_CPU_TYPE_SUFFIX "-" TYPE_S390_CPU
#define S390_CPU_TYPE_NAME(name) (name S390_CPU_TYPE_SUFFIX)

/* Generate type name for a cpu model. Caller has to free the string. */
static char *s390_cpu_type_name(const char *model_name)
{
    return g_strdup_printf(S390_CPU_TYPE_NAME("%s"), model_name);
}

/* Generate type name for a base cpu model. Caller has to free the string. */
static char *s390_base_cpu_type_name(const char *model_name)
{
    return g_strdup_printf(S390_CPU_TYPE_NAME("%s-base"), model_name);
}

ObjectClass *s390_cpu_class_by_name(const char *name)
{
    char *typename = s390_cpu_type_name(name);
    ObjectClass *oc;

    oc = object_class_by_name(typename);
    g_free(typename);
    return oc;
}

static const TypeInfo qemu_s390_cpu_type_info = {
    .name = S390_CPU_TYPE_NAME("qemu"),
    .parent = TYPE_S390_CPU,
    .instance_init = s390_qemu_cpu_model_initfn,
    .instance_finalize = s390_cpu_model_finalize,
    .class_init = s390_qemu_cpu_model_class_init,
};

#ifdef CONFIG_KVM
static const TypeInfo host_s390_cpu_type_info = {
    .name = S390_CPU_TYPE_NAME("host"),
    .parent = TYPE_S390_CPU,
    .instance_init = s390_host_cpu_model_initfn,
    .instance_finalize = s390_cpu_model_finalize,
    .class_init = s390_host_cpu_model_class_init,
};
#endif

static void register_types(void)
{
    int i;

    /* init all bitmaps from gnerated data initially */
    for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
        s390_init_feat_bitmap(s390_cpu_defs[i].base_init,
                              s390_cpu_defs[i].base_feat);
        s390_init_feat_bitmap(s390_cpu_defs[i].default_init,
                              s390_cpu_defs[i].default_feat);
        s390_init_feat_bitmap(s390_cpu_defs[i].full_init,
                              s390_cpu_defs[i].full_feat);
    }

    for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
        char *base_name = s390_base_cpu_type_name(s390_cpu_defs[i].name);
        TypeInfo ti_base = {
            .name = base_name,
            .parent = TYPE_S390_CPU,
            .instance_init = s390_cpu_model_initfn,
            .instance_finalize = s390_cpu_model_finalize,
            .class_init = s390_base_cpu_model_class_init,
            .class_data = (void *) &s390_cpu_defs[i],
        };
        char *name = s390_cpu_type_name(s390_cpu_defs[i].name);
        TypeInfo ti = {
            .name = name,
            .parent = TYPE_S390_CPU,
            .instance_init = s390_cpu_model_initfn,
            .instance_finalize = s390_cpu_model_finalize,
            .class_init = s390_cpu_model_class_init,
            .class_data = (void *) &s390_cpu_defs[i],
        };

        type_register_static(&ti_base);
        type_register_static(&ti);
        g_free(base_name);
        g_free(name);
    }

    type_register_static(&qemu_s390_cpu_type_info);
#ifdef CONFIG_KVM
    type_register_static(&host_s390_cpu_type_info);
#endif
}

type_init(register_types)