-
Notifications
You must be signed in to change notification settings - Fork 5.3k
/
helper.c
13847 lines (12637 loc) · 493 KB
/
helper.c
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
/*
* ARM generic helpers.
*
* This code is licensed under the GNU GPL v2 or later.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "qemu/log.h"
#include "target/arm/idau.h"
#include "trace.h"
#include "cpu.h"
#include "internals.h"
#include "exec/helper-proto.h"
#include "qemu/host-utils.h"
#include "qemu/main-loop.h"
#include "qemu/timer.h"
#include "qemu/bitops.h"
#include "qemu/crc32c.h"
#include "qemu/qemu-print.h"
#include "exec/exec-all.h"
#include <zlib.h> /* For crc32 */
#include "hw/irq.h"
#include "semihosting/semihost.h"
#include "sysemu/cpus.h"
#include "sysemu/cpu-timers.h"
#include "sysemu/kvm.h"
#include "qemu/range.h"
#include "qapi/qapi-commands-machine-target.h"
#include "qapi/error.h"
#include "qemu/guest-random.h"
#ifdef CONFIG_TCG
#include "arm_ldst.h"
#include "exec/cpu_ldst.h"
#include "semihosting/common-semi.h"
#endif
#define ARM_CPU_FREQ 1000000000 /* FIXME: 1 GHz, should be configurable */
#define PMCR_NUM_COUNTERS 4 /* QEMU IMPDEF choice */
#ifndef CONFIG_USER_ONLY
static bool get_phys_addr_lpae(CPUARMState *env, uint64_t address,
MMUAccessType access_type, ARMMMUIdx mmu_idx,
bool s1_is_el0,
hwaddr *phys_ptr, MemTxAttrs *txattrs, int *prot,
target_ulong *page_size_ptr,
ARMMMUFaultInfo *fi, ARMCacheAttrs *cacheattrs)
__attribute__((nonnull));
#endif
static void switch_mode(CPUARMState *env, int mode);
static int aa64_va_parameter_tbi(uint64_t tcr, ARMMMUIdx mmu_idx);
static uint64_t raw_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
assert(ri->fieldoffset);
if (cpreg_field_is_64bit(ri)) {
return CPREG_FIELD64(env, ri);
} else {
return CPREG_FIELD32(env, ri);
}
}
static void raw_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
assert(ri->fieldoffset);
if (cpreg_field_is_64bit(ri)) {
CPREG_FIELD64(env, ri) = value;
} else {
CPREG_FIELD32(env, ri) = value;
}
}
static void *raw_ptr(CPUARMState *env, const ARMCPRegInfo *ri)
{
return (char *)env + ri->fieldoffset;
}
uint64_t read_raw_cp_reg(CPUARMState *env, const ARMCPRegInfo *ri)
{
/* Raw read of a coprocessor register (as needed for migration, etc). */
if (ri->type & ARM_CP_CONST) {
return ri->resetvalue;
} else if (ri->raw_readfn) {
return ri->raw_readfn(env, ri);
} else if (ri->readfn) {
return ri->readfn(env, ri);
} else {
return raw_read(env, ri);
}
}
static void write_raw_cp_reg(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t v)
{
/* Raw write of a coprocessor register (as needed for migration, etc).
* Note that constant registers are treated as write-ignored; the
* caller should check for success by whether a readback gives the
* value written.
*/
if (ri->type & ARM_CP_CONST) {
return;
} else if (ri->raw_writefn) {
ri->raw_writefn(env, ri, v);
} else if (ri->writefn) {
ri->writefn(env, ri, v);
} else {
raw_write(env, ri, v);
}
}
static bool raw_accessors_invalid(const ARMCPRegInfo *ri)
{
/* Return true if the regdef would cause an assertion if you called
* read_raw_cp_reg() or write_raw_cp_reg() on it (ie if it is a
* program bug for it not to have the NO_RAW flag).
* NB that returning false here doesn't necessarily mean that calling
* read/write_raw_cp_reg() is safe, because we can't distinguish "has
* read/write access functions which are safe for raw use" from "has
* read/write access functions which have side effects but has forgotten
* to provide raw access functions".
* The tests here line up with the conditions in read/write_raw_cp_reg()
* and assertions in raw_read()/raw_write().
*/
if ((ri->type & ARM_CP_CONST) ||
ri->fieldoffset ||
((ri->raw_writefn || ri->writefn) && (ri->raw_readfn || ri->readfn))) {
return false;
}
return true;
}
bool write_cpustate_to_list(ARMCPU *cpu, bool kvm_sync)
{
/* Write the coprocessor state from cpu->env to the (index,value) list. */
int i;
bool ok = true;
for (i = 0; i < cpu->cpreg_array_len; i++) {
uint32_t regidx = kvm_to_cpreg_id(cpu->cpreg_indexes[i]);
const ARMCPRegInfo *ri;
uint64_t newval;
ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
if (!ri) {
ok = false;
continue;
}
if (ri->type & ARM_CP_NO_RAW) {
continue;
}
newval = read_raw_cp_reg(&cpu->env, ri);
if (kvm_sync) {
/*
* Only sync if the previous list->cpustate sync succeeded.
* Rather than tracking the success/failure state for every
* item in the list, we just recheck "does the raw write we must
* have made in write_list_to_cpustate() read back OK" here.
*/
uint64_t oldval = cpu->cpreg_values[i];
if (oldval == newval) {
continue;
}
write_raw_cp_reg(&cpu->env, ri, oldval);
if (read_raw_cp_reg(&cpu->env, ri) != oldval) {
continue;
}
write_raw_cp_reg(&cpu->env, ri, newval);
}
cpu->cpreg_values[i] = newval;
}
return ok;
}
bool write_list_to_cpustate(ARMCPU *cpu)
{
int i;
bool ok = true;
for (i = 0; i < cpu->cpreg_array_len; i++) {
uint32_t regidx = kvm_to_cpreg_id(cpu->cpreg_indexes[i]);
uint64_t v = cpu->cpreg_values[i];
const ARMCPRegInfo *ri;
ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
if (!ri) {
ok = false;
continue;
}
if (ri->type & ARM_CP_NO_RAW) {
continue;
}
/* Write value and confirm it reads back as written
* (to catch read-only registers and partially read-only
* registers where the incoming migration value doesn't match)
*/
write_raw_cp_reg(&cpu->env, ri, v);
if (read_raw_cp_reg(&cpu->env, ri) != v) {
ok = false;
}
}
return ok;
}
static void add_cpreg_to_list(gpointer key, gpointer opaque)
{
ARMCPU *cpu = opaque;
uint64_t regidx;
const ARMCPRegInfo *ri;
regidx = *(uint32_t *)key;
ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
if (!(ri->type & (ARM_CP_NO_RAW|ARM_CP_ALIAS))) {
cpu->cpreg_indexes[cpu->cpreg_array_len] = cpreg_to_kvm_id(regidx);
/* The value array need not be initialized at this point */
cpu->cpreg_array_len++;
}
}
static void count_cpreg(gpointer key, gpointer opaque)
{
ARMCPU *cpu = opaque;
uint64_t regidx;
const ARMCPRegInfo *ri;
regidx = *(uint32_t *)key;
ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
if (!(ri->type & (ARM_CP_NO_RAW|ARM_CP_ALIAS))) {
cpu->cpreg_array_len++;
}
}
static gint cpreg_key_compare(gconstpointer a, gconstpointer b)
{
uint64_t aidx = cpreg_to_kvm_id(*(uint32_t *)a);
uint64_t bidx = cpreg_to_kvm_id(*(uint32_t *)b);
if (aidx > bidx) {
return 1;
}
if (aidx < bidx) {
return -1;
}
return 0;
}
void init_cpreg_list(ARMCPU *cpu)
{
/* Initialise the cpreg_tuples[] array based on the cp_regs hash.
* Note that we require cpreg_tuples[] to be sorted by key ID.
*/
GList *keys;
int arraylen;
keys = g_hash_table_get_keys(cpu->cp_regs);
keys = g_list_sort(keys, cpreg_key_compare);
cpu->cpreg_array_len = 0;
g_list_foreach(keys, count_cpreg, cpu);
arraylen = cpu->cpreg_array_len;
cpu->cpreg_indexes = g_new(uint64_t, arraylen);
cpu->cpreg_values = g_new(uint64_t, arraylen);
cpu->cpreg_vmstate_indexes = g_new(uint64_t, arraylen);
cpu->cpreg_vmstate_values = g_new(uint64_t, arraylen);
cpu->cpreg_vmstate_array_len = cpu->cpreg_array_len;
cpu->cpreg_array_len = 0;
g_list_foreach(keys, add_cpreg_to_list, cpu);
assert(cpu->cpreg_array_len == arraylen);
g_list_free(keys);
}
/*
* Some registers are not accessible from AArch32 EL3 if SCR.NS == 0.
*/
static CPAccessResult access_el3_aa32ns(CPUARMState *env,
const ARMCPRegInfo *ri,
bool isread)
{
if (!is_a64(env) && arm_current_el(env) == 3 &&
arm_is_secure_below_el3(env)) {
return CP_ACCESS_TRAP_UNCATEGORIZED;
}
return CP_ACCESS_OK;
}
/* Some secure-only AArch32 registers trap to EL3 if used from
* Secure EL1 (but are just ordinary UNDEF in other non-EL3 contexts).
* Note that an access from Secure EL1 can only happen if EL3 is AArch64.
* We assume that the .access field is set to PL1_RW.
*/
static CPAccessResult access_trap_aa32s_el1(CPUARMState *env,
const ARMCPRegInfo *ri,
bool isread)
{
if (arm_current_el(env) == 3) {
return CP_ACCESS_OK;
}
if (arm_is_secure_below_el3(env)) {
if (env->cp15.scr_el3 & SCR_EEL2) {
return CP_ACCESS_TRAP_EL2;
}
return CP_ACCESS_TRAP_EL3;
}
/* This will be EL1 NS and EL2 NS, which just UNDEF */
return CP_ACCESS_TRAP_UNCATEGORIZED;
}
static uint64_t arm_mdcr_el2_eff(CPUARMState *env)
{
return arm_is_el2_enabled(env) ? env->cp15.mdcr_el2 : 0;
}
/* Check for traps to "powerdown debug" registers, which are controlled
* by MDCR.TDOSA
*/
static CPAccessResult access_tdosa(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
int el = arm_current_el(env);
uint64_t mdcr_el2 = arm_mdcr_el2_eff(env);
bool mdcr_el2_tdosa = (mdcr_el2 & MDCR_TDOSA) || (mdcr_el2 & MDCR_TDE) ||
(arm_hcr_el2_eff(env) & HCR_TGE);
if (el < 2 && mdcr_el2_tdosa) {
return CP_ACCESS_TRAP_EL2;
}
if (el < 3 && (env->cp15.mdcr_el3 & MDCR_TDOSA)) {
return CP_ACCESS_TRAP_EL3;
}
return CP_ACCESS_OK;
}
/* Check for traps to "debug ROM" registers, which are controlled
* by MDCR_EL2.TDRA for EL2 but by the more general MDCR_EL3.TDA for EL3.
*/
static CPAccessResult access_tdra(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
int el = arm_current_el(env);
uint64_t mdcr_el2 = arm_mdcr_el2_eff(env);
bool mdcr_el2_tdra = (mdcr_el2 & MDCR_TDRA) || (mdcr_el2 & MDCR_TDE) ||
(arm_hcr_el2_eff(env) & HCR_TGE);
if (el < 2 && mdcr_el2_tdra) {
return CP_ACCESS_TRAP_EL2;
}
if (el < 3 && (env->cp15.mdcr_el3 & MDCR_TDA)) {
return CP_ACCESS_TRAP_EL3;
}
return CP_ACCESS_OK;
}
/* Check for traps to general debug registers, which are controlled
* by MDCR_EL2.TDA for EL2 and MDCR_EL3.TDA for EL3.
*/
static CPAccessResult access_tda(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
int el = arm_current_el(env);
uint64_t mdcr_el2 = arm_mdcr_el2_eff(env);
bool mdcr_el2_tda = (mdcr_el2 & MDCR_TDA) || (mdcr_el2 & MDCR_TDE) ||
(arm_hcr_el2_eff(env) & HCR_TGE);
if (el < 2 && mdcr_el2_tda) {
return CP_ACCESS_TRAP_EL2;
}
if (el < 3 && (env->cp15.mdcr_el3 & MDCR_TDA)) {
return CP_ACCESS_TRAP_EL3;
}
return CP_ACCESS_OK;
}
/* Check for traps to performance monitor registers, which are controlled
* by MDCR_EL2.TPM for EL2 and MDCR_EL3.TPM for EL3.
*/
static CPAccessResult access_tpm(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
int el = arm_current_el(env);
uint64_t mdcr_el2 = arm_mdcr_el2_eff(env);
if (el < 2 && (mdcr_el2 & MDCR_TPM)) {
return CP_ACCESS_TRAP_EL2;
}
if (el < 3 && (env->cp15.mdcr_el3 & MDCR_TPM)) {
return CP_ACCESS_TRAP_EL3;
}
return CP_ACCESS_OK;
}
/* Check for traps from EL1 due to HCR_EL2.TVM and HCR_EL2.TRVM. */
static CPAccessResult access_tvm_trvm(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
if (arm_current_el(env) == 1) {
uint64_t trap = isread ? HCR_TRVM : HCR_TVM;
if (arm_hcr_el2_eff(env) & trap) {
return CP_ACCESS_TRAP_EL2;
}
}
return CP_ACCESS_OK;
}
/* Check for traps from EL1 due to HCR_EL2.TSW. */
static CPAccessResult access_tsw(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
if (arm_current_el(env) == 1 && (arm_hcr_el2_eff(env) & HCR_TSW)) {
return CP_ACCESS_TRAP_EL2;
}
return CP_ACCESS_OK;
}
/* Check for traps from EL1 due to HCR_EL2.TACR. */
static CPAccessResult access_tacr(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
if (arm_current_el(env) == 1 && (arm_hcr_el2_eff(env) & HCR_TACR)) {
return CP_ACCESS_TRAP_EL2;
}
return CP_ACCESS_OK;
}
/* Check for traps from EL1 due to HCR_EL2.TTLB. */
static CPAccessResult access_ttlb(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
if (arm_current_el(env) == 1 && (arm_hcr_el2_eff(env) & HCR_TTLB)) {
return CP_ACCESS_TRAP_EL2;
}
return CP_ACCESS_OK;
}
static void dacr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
{
ARMCPU *cpu = env_archcpu(env);
raw_write(env, ri, value);
tlb_flush(CPU(cpu)); /* Flush TLB as domain not tracked in TLB */
}
static void fcse_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
{
ARMCPU *cpu = env_archcpu(env);
if (raw_read(env, ri) != value) {
/* Unlike real hardware the qemu TLB uses virtual addresses,
* not modified virtual addresses, so this causes a TLB flush.
*/
tlb_flush(CPU(cpu));
raw_write(env, ri, value);
}
}
static void contextidr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
ARMCPU *cpu = env_archcpu(env);
if (raw_read(env, ri) != value && !arm_feature(env, ARM_FEATURE_PMSA)
&& !extended_addresses_enabled(env)) {
/* For VMSA (when not using the LPAE long descriptor page table
* format) this register includes the ASID, so do a TLB flush.
* For PMSA it is purely a process ID and no action is needed.
*/
tlb_flush(CPU(cpu));
}
raw_write(env, ri, value);
}
/* IS variants of TLB operations must affect all cores */
static void tlbiall_is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = env_cpu(env);
tlb_flush_all_cpus_synced(cs);
}
static void tlbiasid_is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = env_cpu(env);
tlb_flush_all_cpus_synced(cs);
}
static void tlbimva_is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = env_cpu(env);
tlb_flush_page_all_cpus_synced(cs, value & TARGET_PAGE_MASK);
}
static void tlbimvaa_is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = env_cpu(env);
tlb_flush_page_all_cpus_synced(cs, value & TARGET_PAGE_MASK);
}
/*
* Non-IS variants of TLB operations are upgraded to
* IS versions if we are at EL1 and HCR_EL2.FB is effectively set to
* force broadcast of these operations.
*/
static bool tlb_force_broadcast(CPUARMState *env)
{
return arm_current_el(env) == 1 && (arm_hcr_el2_eff(env) & HCR_FB);
}
static void tlbiall_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Invalidate all (TLBIALL) */
CPUState *cs = env_cpu(env);
if (tlb_force_broadcast(env)) {
tlb_flush_all_cpus_synced(cs);
} else {
tlb_flush(cs);
}
}
static void tlbimva_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Invalidate single TLB entry by MVA and ASID (TLBIMVA) */
CPUState *cs = env_cpu(env);
value &= TARGET_PAGE_MASK;
if (tlb_force_broadcast(env)) {
tlb_flush_page_all_cpus_synced(cs, value);
} else {
tlb_flush_page(cs, value);
}
}
static void tlbiasid_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Invalidate by ASID (TLBIASID) */
CPUState *cs = env_cpu(env);
if (tlb_force_broadcast(env)) {
tlb_flush_all_cpus_synced(cs);
} else {
tlb_flush(cs);
}
}
static void tlbimvaa_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* Invalidate single entry by MVA, all ASIDs (TLBIMVAA) */
CPUState *cs = env_cpu(env);
value &= TARGET_PAGE_MASK;
if (tlb_force_broadcast(env)) {
tlb_flush_page_all_cpus_synced(cs, value);
} else {
tlb_flush_page(cs, value);
}
}
static void tlbiall_nsnh_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = env_cpu(env);
tlb_flush_by_mmuidx(cs,
ARMMMUIdxBit_E10_1 |
ARMMMUIdxBit_E10_1_PAN |
ARMMMUIdxBit_E10_0);
}
static void tlbiall_nsnh_is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = env_cpu(env);
tlb_flush_by_mmuidx_all_cpus_synced(cs,
ARMMMUIdxBit_E10_1 |
ARMMMUIdxBit_E10_1_PAN |
ARMMMUIdxBit_E10_0);
}
static void tlbiall_hyp_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = env_cpu(env);
tlb_flush_by_mmuidx(cs, ARMMMUIdxBit_E2);
}
static void tlbiall_hyp_is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = env_cpu(env);
tlb_flush_by_mmuidx_all_cpus_synced(cs, ARMMMUIdxBit_E2);
}
static void tlbimva_hyp_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = env_cpu(env);
uint64_t pageaddr = value & ~MAKE_64BIT_MASK(0, 12);
tlb_flush_page_by_mmuidx(cs, pageaddr, ARMMMUIdxBit_E2);
}
static void tlbimva_hyp_is_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
CPUState *cs = env_cpu(env);
uint64_t pageaddr = value & ~MAKE_64BIT_MASK(0, 12);
tlb_flush_page_by_mmuidx_all_cpus_synced(cs, pageaddr,
ARMMMUIdxBit_E2);
}
static const ARMCPRegInfo cp_reginfo[] = {
/* Define the secure and non-secure FCSE identifier CP registers
* separately because there is no secure bank in V8 (no _EL3). This allows
* the secure register to be properly reset and migrated. There is also no
* v8 EL1 version of the register so the non-secure instance stands alone.
*/
{ .name = "FCSEIDR",
.cp = 15, .opc1 = 0, .crn = 13, .crm = 0, .opc2 = 0,
.access = PL1_RW, .secure = ARM_CP_SECSTATE_NS,
.fieldoffset = offsetof(CPUARMState, cp15.fcseidr_ns),
.resetvalue = 0, .writefn = fcse_write, .raw_writefn = raw_write, },
{ .name = "FCSEIDR_S",
.cp = 15, .opc1 = 0, .crn = 13, .crm = 0, .opc2 = 0,
.access = PL1_RW, .secure = ARM_CP_SECSTATE_S,
.fieldoffset = offsetof(CPUARMState, cp15.fcseidr_s),
.resetvalue = 0, .writefn = fcse_write, .raw_writefn = raw_write, },
/* Define the secure and non-secure context identifier CP registers
* separately because there is no secure bank in V8 (no _EL3). This allows
* the secure register to be properly reset and migrated. In the
* non-secure case, the 32-bit register will have reset and migration
* disabled during registration as it is handled by the 64-bit instance.
*/
{ .name = "CONTEXTIDR_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 13, .crm = 0, .opc2 = 1,
.access = PL1_RW, .accessfn = access_tvm_trvm,
.secure = ARM_CP_SECSTATE_NS,
.fieldoffset = offsetof(CPUARMState, cp15.contextidr_el[1]),
.resetvalue = 0, .writefn = contextidr_write, .raw_writefn = raw_write, },
{ .name = "CONTEXTIDR_S", .state = ARM_CP_STATE_AA32,
.cp = 15, .opc1 = 0, .crn = 13, .crm = 0, .opc2 = 1,
.access = PL1_RW, .accessfn = access_tvm_trvm,
.secure = ARM_CP_SECSTATE_S,
.fieldoffset = offsetof(CPUARMState, cp15.contextidr_s),
.resetvalue = 0, .writefn = contextidr_write, .raw_writefn = raw_write, },
REGINFO_SENTINEL
};
static const ARMCPRegInfo not_v8_cp_reginfo[] = {
/* NB: Some of these registers exist in v8 but with more precise
* definitions that don't use CP_ANY wildcards (mostly in v8_cp_reginfo[]).
*/
/* MMU Domain access control / MPU write buffer control */
{ .name = "DACR",
.cp = 15, .opc1 = CP_ANY, .crn = 3, .crm = CP_ANY, .opc2 = CP_ANY,
.access = PL1_RW, .accessfn = access_tvm_trvm, .resetvalue = 0,
.writefn = dacr_write, .raw_writefn = raw_write,
.bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.dacr_s),
offsetoflow32(CPUARMState, cp15.dacr_ns) } },
/* ARMv7 allocates a range of implementation defined TLB LOCKDOWN regs.
* For v6 and v5, these mappings are overly broad.
*/
{ .name = "TLB_LOCKDOWN", .cp = 15, .crn = 10, .crm = 0,
.opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_NOP },
{ .name = "TLB_LOCKDOWN", .cp = 15, .crn = 10, .crm = 1,
.opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_NOP },
{ .name = "TLB_LOCKDOWN", .cp = 15, .crn = 10, .crm = 4,
.opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_NOP },
{ .name = "TLB_LOCKDOWN", .cp = 15, .crn = 10, .crm = 8,
.opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_NOP },
/* Cache maintenance ops; some of this space may be overridden later. */
{ .name = "CACHEMAINT", .cp = 15, .crn = 7, .crm = CP_ANY,
.opc1 = 0, .opc2 = CP_ANY, .access = PL1_W,
.type = ARM_CP_NOP | ARM_CP_OVERRIDE },
REGINFO_SENTINEL
};
static const ARMCPRegInfo not_v6_cp_reginfo[] = {
/* Not all pre-v6 cores implemented this WFI, so this is slightly
* over-broad.
*/
{ .name = "WFI_v5", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = 2,
.access = PL1_W, .type = ARM_CP_WFI },
REGINFO_SENTINEL
};
static const ARMCPRegInfo not_v7_cp_reginfo[] = {
/* Standard v6 WFI (also used in some pre-v6 cores); not in v7 (which
* is UNPREDICTABLE; we choose to NOP as most implementations do).
*/
{ .name = "WFI_v6", .cp = 15, .crn = 7, .crm = 0, .opc1 = 0, .opc2 = 4,
.access = PL1_W, .type = ARM_CP_WFI },
/* L1 cache lockdown. Not architectural in v6 and earlier but in practice
* implemented in 926, 946, 1026, 1136, 1176 and 11MPCore. StrongARM and
* OMAPCP will override this space.
*/
{ .name = "DLOCKDOWN", .cp = 15, .crn = 9, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_data),
.resetvalue = 0 },
{ .name = "ILOCKDOWN", .cp = 15, .crn = 9, .crm = 0, .opc1 = 0, .opc2 = 1,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_insn),
.resetvalue = 0 },
/* v6 doesn't have the cache ID registers but Linux reads them anyway */
{ .name = "DUMMY", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = CP_ANY,
.access = PL1_R, .type = ARM_CP_CONST | ARM_CP_NO_RAW,
.resetvalue = 0 },
/* We don't implement pre-v7 debug but most CPUs had at least a DBGDIDR;
* implementing it as RAZ means the "debug architecture version" bits
* will read as a reserved value, which should cause Linux to not try
* to use the debug hardware.
*/
{ .name = "DBGDIDR", .cp = 14, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
/* MMU TLB control. Note that the wildcarding means we cover not just
* the unified TLB ops but also the dside/iside/inner-shareable variants.
*/
{ .name = "TLBIALL", .cp = 15, .crn = 8, .crm = CP_ANY,
.opc1 = CP_ANY, .opc2 = 0, .access = PL1_W, .writefn = tlbiall_write,
.type = ARM_CP_NO_RAW },
{ .name = "TLBIMVA", .cp = 15, .crn = 8, .crm = CP_ANY,
.opc1 = CP_ANY, .opc2 = 1, .access = PL1_W, .writefn = tlbimva_write,
.type = ARM_CP_NO_RAW },
{ .name = "TLBIASID", .cp = 15, .crn = 8, .crm = CP_ANY,
.opc1 = CP_ANY, .opc2 = 2, .access = PL1_W, .writefn = tlbiasid_write,
.type = ARM_CP_NO_RAW },
{ .name = "TLBIMVAA", .cp = 15, .crn = 8, .crm = CP_ANY,
.opc1 = CP_ANY, .opc2 = 3, .access = PL1_W, .writefn = tlbimvaa_write,
.type = ARM_CP_NO_RAW },
{ .name = "PRRR", .cp = 15, .crn = 10, .crm = 2,
.opc1 = 0, .opc2 = 0, .access = PL1_RW, .type = ARM_CP_NOP },
{ .name = "NMRR", .cp = 15, .crn = 10, .crm = 2,
.opc1 = 0, .opc2 = 1, .access = PL1_RW, .type = ARM_CP_NOP },
REGINFO_SENTINEL
};
static void cpacr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
uint32_t mask = 0;
/* In ARMv8 most bits of CPACR_EL1 are RES0. */
if (!arm_feature(env, ARM_FEATURE_V8)) {
/* ARMv7 defines bits for unimplemented coprocessors as RAZ/WI.
* ASEDIS [31] and D32DIS [30] are both UNK/SBZP without VFP.
* TRCDIS [28] is RAZ/WI since we do not implement a trace macrocell.
*/
if (cpu_isar_feature(aa32_vfp_simd, env_archcpu(env))) {
/* VFP coprocessor: cp10 & cp11 [23:20] */
mask |= (1 << 31) | (1 << 30) | (0xf << 20);
if (!arm_feature(env, ARM_FEATURE_NEON)) {
/* ASEDIS [31] bit is RAO/WI */
value |= (1 << 31);
}
/* VFPv3 and upwards with NEON implement 32 double precision
* registers (D0-D31).
*/
if (!cpu_isar_feature(aa32_simd_r32, env_archcpu(env))) {
/* D32DIS [30] is RAO/WI if D16-31 are not implemented. */
value |= (1 << 30);
}
}
value &= mask;
}
/*
* For A-profile AArch32 EL3 (but not M-profile secure mode), if NSACR.CP10
* is 0 then CPACR.{CP11,CP10} ignore writes and read as 0b00.
*/
if (arm_feature(env, ARM_FEATURE_EL3) && !arm_el_is_aa64(env, 3) &&
!arm_is_secure(env) && !extract32(env->cp15.nsacr, 10, 1)) {
value &= ~(0xf << 20);
value |= env->cp15.cpacr_el1 & (0xf << 20);
}
env->cp15.cpacr_el1 = value;
}
static uint64_t cpacr_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
/*
* For A-profile AArch32 EL3 (but not M-profile secure mode), if NSACR.CP10
* is 0 then CPACR.{CP11,CP10} ignore writes and read as 0b00.
*/
uint64_t value = env->cp15.cpacr_el1;
if (arm_feature(env, ARM_FEATURE_EL3) && !arm_el_is_aa64(env, 3) &&
!arm_is_secure(env) && !extract32(env->cp15.nsacr, 10, 1)) {
value &= ~(0xf << 20);
}
return value;
}
static void cpacr_reset(CPUARMState *env, const ARMCPRegInfo *ri)
{
/* Call cpacr_write() so that we reset with the correct RAO bits set
* for our CPU features.
*/
cpacr_write(env, ri, 0);
}
static CPAccessResult cpacr_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
if (arm_feature(env, ARM_FEATURE_V8)) {
/* Check if CPACR accesses are to be trapped to EL2 */
if (arm_current_el(env) == 1 && arm_is_el2_enabled(env) &&
(env->cp15.cptr_el[2] & CPTR_TCPAC)) {
return CP_ACCESS_TRAP_EL2;
/* Check if CPACR accesses are to be trapped to EL3 */
} else if (arm_current_el(env) < 3 &&
(env->cp15.cptr_el[3] & CPTR_TCPAC)) {
return CP_ACCESS_TRAP_EL3;
}
}
return CP_ACCESS_OK;
}
static CPAccessResult cptr_access(CPUARMState *env, const ARMCPRegInfo *ri,
bool isread)
{
/* Check if CPTR accesses are set to trap to EL3 */
if (arm_current_el(env) == 2 && (env->cp15.cptr_el[3] & CPTR_TCPAC)) {
return CP_ACCESS_TRAP_EL3;
}
return CP_ACCESS_OK;
}
static const ARMCPRegInfo v6_cp_reginfo[] = {
/* prefetch by MVA in v6, NOP in v7 */
{ .name = "MVA_prefetch",
.cp = 15, .crn = 7, .crm = 13, .opc1 = 0, .opc2 = 1,
.access = PL1_W, .type = ARM_CP_NOP },
/* We need to break the TB after ISB to execute self-modifying code
* correctly and also to take any pending interrupts immediately.
* So use arm_cp_write_ignore() function instead of ARM_CP_NOP flag.
*/
{ .name = "ISB", .cp = 15, .crn = 7, .crm = 5, .opc1 = 0, .opc2 = 4,
.access = PL0_W, .type = ARM_CP_NO_RAW, .writefn = arm_cp_write_ignore },
{ .name = "DSB", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 4,
.access = PL0_W, .type = ARM_CP_NOP },
{ .name = "DMB", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 5,
.access = PL0_W, .type = ARM_CP_NOP },
{ .name = "IFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 2,
.access = PL1_RW, .accessfn = access_tvm_trvm,
.bank_fieldoffsets = { offsetof(CPUARMState, cp15.ifar_s),
offsetof(CPUARMState, cp15.ifar_ns) },
.resetvalue = 0, },
/* Watchpoint Fault Address Register : should actually only be present
* for 1136, 1176, 11MPCore.
*/
{ .name = "WFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 1,
.access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0, },
{ .name = "CPACR", .state = ARM_CP_STATE_BOTH, .opc0 = 3,
.crn = 1, .crm = 0, .opc1 = 0, .opc2 = 2, .accessfn = cpacr_access,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.cpacr_el1),
.resetfn = cpacr_reset, .writefn = cpacr_write, .readfn = cpacr_read },
REGINFO_SENTINEL
};
typedef struct pm_event {
uint16_t number; /* PMEVTYPER.evtCount is 16 bits wide */
/* If the event is supported on this CPU (used to generate PMCEID[01]) */
bool (*supported)(CPUARMState *);
/*
* Retrieve the current count of the underlying event. The programmed
* counters hold a difference from the return value from this function
*/
uint64_t (*get_count)(CPUARMState *);
/*
* Return how many nanoseconds it will take (at a minimum) for count events
* to occur. A negative value indicates the counter will never overflow, or
* that the counter has otherwise arranged for the overflow bit to be set
* and the PMU interrupt to be raised on overflow.
*/
int64_t (*ns_per_count)(uint64_t);
} pm_event;
static bool event_always_supported(CPUARMState *env)
{
return true;
}
static uint64_t swinc_get_count(CPUARMState *env)
{
/*
* SW_INCR events are written directly to the pmevcntr's by writes to
* PMSWINC, so there is no underlying count maintained by the PMU itself
*/
return 0;
}
static int64_t swinc_ns_per(uint64_t ignored)
{
return -1;
}
/*
* Return the underlying cycle count for the PMU cycle counters. If we're in
* usermode, simply return 0.
*/
static uint64_t cycles_get_count(CPUARMState *env)
{
#ifndef CONFIG_USER_ONLY
return muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
ARM_CPU_FREQ, NANOSECONDS_PER_SECOND);
#else
return cpu_get_host_ticks();
#endif
}
#ifndef CONFIG_USER_ONLY
static int64_t cycles_ns_per(uint64_t cycles)
{
return (ARM_CPU_FREQ / NANOSECONDS_PER_SECOND) * cycles;
}
static bool instructions_supported(CPUARMState *env)
{
return icount_enabled() == 1; /* Precise instruction counting */
}
static uint64_t instructions_get_count(CPUARMState *env)
{
return (uint64_t)icount_get_raw();
}
static int64_t instructions_ns_per(uint64_t icount)
{
return icount_to_ns((int64_t)icount);
}
#endif
static bool pmu_8_1_events_supported(CPUARMState *env)
{
/* For events which are supported in any v8.1 PMU */
return cpu_isar_feature(any_pmu_8_1, env_archcpu(env));
}
static bool pmu_8_4_events_supported(CPUARMState *env)
{
/* For events which are supported in any v8.1 PMU */
return cpu_isar_feature(any_pmu_8_4, env_archcpu(env));
}
static uint64_t zero_event_get_count(CPUARMState *env)
{
/* For events which on QEMU never fire, so their count is always zero */
return 0;
}
static int64_t zero_event_ns_per(uint64_t cycles)
{
/* An event which never fires can never overflow */
return -1;
}
static const pm_event pm_events[] = {
{ .number = 0x000, /* SW_INCR */
.supported = event_always_supported,
.get_count = swinc_get_count,
.ns_per_count = swinc_ns_per,
},
#ifndef CONFIG_USER_ONLY
{ .number = 0x008, /* INST_RETIRED, Instruction architecturally executed */
.supported = instructions_supported,
.get_count = instructions_get_count,