summaryrefslogtreecommitdiffstats
path: root/tools/perf/pmu-events/jevents.c
blob: 7422b0ea879017f0543515657e2b4b1902ae35b1 (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
#define  _XOPEN_SOURCE 500	/* needed for nftw() */
#define  _GNU_SOURCE		/* needed for asprintf() */

/* Parse event JSON files */

/*
 * Copyright (c) 2014, Intel Corporation
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <stdarg.h>
#include <libgen.h>
#include <limits.h>
#include <dirent.h>
#include <sys/time.h>			/* getrlimit */
#include <sys/resource.h>		/* getrlimit */
#include <ftw.h>
#include <sys/stat.h>
#include <linux/list.h>
#include "jsmn.h"
#include "json.h"
#include "pmu-events.h"

int verbose;
char *prog;

struct json_event {
	char *name;
	char *compat;
	char *event;
	char *desc;
	char *long_desc;
	char *pmu;
	char *unit;
	char *perpkg;
	char *aggr_mode;
	char *metric_expr;
	char *metric_name;
	char *metric_group;
	char *deprecated;
	char *metric_constraint;
};

enum aggr_mode_class convert(const char *aggr_mode)
{
	if (!strcmp(aggr_mode, "PerCore"))
		return PerCore;
	else if (!strcmp(aggr_mode, "PerChip"))
		return PerChip;

	pr_err("%s: Wrong AggregationMode value '%s'\n", prog, aggr_mode);
	return -1;
}

typedef int (*func)(void *data, struct json_event *je);

static LIST_HEAD(sys_event_tables);

struct sys_event_table {
	struct list_head list;
	char *soc_id;
};

static void free_sys_event_tables(void)
{
	struct sys_event_table *et, *next;

	list_for_each_entry_safe(et, next, &sys_event_tables, list) {
		free(et->soc_id);
		free(et);
	}
}

int eprintf(int level, int var, const char *fmt, ...)
{

	int ret;
	va_list args;

	if (var < level)
		return 0;

	va_start(args, fmt);

	ret = vfprintf(stderr, fmt, args);

	va_end(args);

	return ret;
}

static void addfield(char *map, char **dst, const char *sep,
		     const char *a, jsmntok_t *bt)
{
	unsigned int len = strlen(a) + 1 + strlen(sep);
	int olen = *dst ? strlen(*dst) : 0;
	int blen = bt ? json_len(bt) : 0;
	char *out;

	out = realloc(*dst, len + olen + blen);
	if (!out) {
		/* Don't add field in this case */
		return;
	}
	*dst = out;

	if (!olen)
		*(*dst) = 0;
	else
		strcat(*dst, sep);
	strcat(*dst, a);
	if (bt)
		strncat(*dst, map + bt->start, blen);
}

static void fixname(char *s)
{
	for (; *s; s++)
		*s = tolower(*s);
}

static void fixdesc(char *s)
{
	char *e = s + strlen(s);

	/* Remove trailing dots that look ugly in perf list */
	--e;
	while (e >= s && isspace(*e))
		--e;
	if (*e == '.')
		*e = 0;
}

/* Add escapes for '\' so they are proper C strings. */
static char *fixregex(char *s)
{
	int len = 0;
	int esc_count = 0;
	char *fixed = NULL;
	char *p, *q;

	/* Count the number of '\' in string */
	for (p = s; *p; p++) {
		++len;
		if (*p == '\\')
			++esc_count;
	}

	if (esc_count == 0)
		return s;

	/* allocate space for a new string */
	fixed = (char *) malloc(len + esc_count + 1);
	if (!fixed)
		return NULL;

	/* copy over the characters */
	q = fixed;
	for (p = s; *p; p++) {
		if (*p == '\\') {
			*q = '\\';
			++q;
		}
		*q = *p;
		++q;
	}
	*q = '\0';
	return fixed;
}

static struct msrmap {
	const char *num;
	const char *pname;
} msrmap[] = {
	{ "0x3F6", "ldlat=" },
	{ "0x1A6", "offcore_rsp=" },
	{ "0x1A7", "offcore_rsp=" },
	{ "0x3F7", "frontend=" },
	{ NULL, NULL }
};

static struct field {
	const char *field;
	const char *kernel;
} fields[] = {
	{ "UMask",	"umask=" },
	{ "CounterMask", "cmask=" },
	{ "Invert",	"inv=" },
	{ "AnyThread",	"any=" },
	{ "EdgeDetect",	"edge=" },
	{ "SampleAfterValue", "period=" },
	{ "FCMask",	"fc_mask=" },
	{ "PortMask",	"ch_mask=" },
	{ NULL, NULL }
};

static void cut_comma(char *map, jsmntok_t *newval)
{
	int i;

	/* Cut off everything after comma */
	for (i = newval->start; i < newval->end; i++) {
		if (map[i] == ',')
			newval->end = i;
	}
}

static int match_field(char *map, jsmntok_t *field, int nz,
		       char **event, jsmntok_t *val)
{
	struct field *f;
	jsmntok_t newval = *val;

	for (f = fields; f->field; f++)
		if (json_streq(map, field, f->field) && nz) {
			cut_comma(map, &newval);
			addfield(map, event, ",", f->kernel, &newval);
			return 1;
		}
	return 0;
}

static struct msrmap *lookup_msr(char *map, jsmntok_t *val)
{
	jsmntok_t newval = *val;
	static bool warned;
	int i;

	cut_comma(map, &newval);
	for (i = 0; msrmap[i].num; i++)
		if (json_streq(map, &newval, msrmap[i].num))
			return &msrmap[i];
	if (!warned) {
		warned = true;
		pr_err("%s: Unknown MSR in event file %.*s\n", prog,
			json_len(val), map + val->start);
	}
	return NULL;
}

static struct map {
	const char *json;
	const char *perf;
} unit_to_pmu[] = {
	{ "CBO", "uncore_cbox" },
	{ "QPI LL", "uncore_qpi" },
	{ "SBO", "uncore_sbox" },
	{ "iMPH-U", "uncore_arb" },
	{ "CPU-M-CF", "cpum_cf" },
	{ "CPU-M-SF", "cpum_sf" },
	{ "UPI LL", "uncore_upi" },
	{ "hisi_sccl,ddrc", "hisi_sccl,ddrc" },
	{ "hisi_sccl,hha", "hisi_sccl,hha" },
	{ "hisi_sccl,l3c", "hisi_sccl,l3c" },
	/* it's not realistic to keep adding these, we need something more scalable ... */
	{ "imx8_ddr", "imx8_ddr" },
	{ "L3PMC", "amd_l3" },
	{ "DFPMC", "amd_df" },
	{ "cpu_core", "cpu_core" },
	{ "cpu_atom", "cpu_atom" },
	{}
};

static const char *field_to_perf(struct map *table, char *map, jsmntok_t *val)
{
	int i;

	for (i = 0; table[i].json; i++) {
		if (json_streq(map, val, table[i].json))
			return table[i].perf;
	}
	return NULL;
}

#define EXPECT(e, t, m) do { if (!(e)) {			\
	jsmntok_t *loc = (t);					\
	if (!(t)->start && (t) > tokens)			\
		loc = (t) - 1;					\
	pr_err("%s:%d: " m ", got %s\n", fn,			\
	       json_line(map, loc),				\
	       json_name(t));					\
	err = -EIO;						\
	goto out_free;						\
} } while (0)

static char *topic;

static char *get_topic(void)
{
	char *tp;
	int i;

	/* tp is free'd in process_one_file() */
	i = asprintf(&tp, "%s", topic);
	if (i < 0) {
		pr_info("%s: asprintf() error %s\n", prog);
		return NULL;
	}

	for (i = 0; i < (int) strlen(tp); i++) {
		char c = tp[i];

		if (c == '-')
			tp[i] = ' ';
		else if (c == '.') {
			tp[i] = '\0';
			break;
		}
	}

	return tp;
}

static int add_topic(char *bname)
{
	free(topic);
	topic = strdup(bname);
	if (!topic) {
		pr_info("%s: strdup() error %s for file %s\n", prog,
				strerror(errno), bname);
		return -ENOMEM;
	}
	return 0;
}

struct perf_entry_data {
	FILE *outfp;
	char *topic;
};

static int close_table;

static void print_events_table_prefix(FILE *fp, const char *tblname)
{
	fprintf(fp, "struct pmu_event %s[] = {\n", tblname);
	close_table = 1;
}

static int print_events_table_entry(void *data, struct json_event *je)
{
	struct perf_entry_data *pd = data;
	FILE *outfp = pd->outfp;
	char *topic = pd->topic;

	/*
	 * TODO: Remove formatting chars after debugging to reduce
	 *	 string lengths.
	 */
	fprintf(outfp, "{\n");

	if (je->name)
		fprintf(outfp, "\t.name = \"%s\",\n", je->name);
	if (je->event)
		fprintf(outfp, "\t.event = \"%s\",\n", je->event);
	fprintf(outfp, "\t.desc = \"%s\",\n", je->desc);
	if (je->compat)
		fprintf(outfp, "\t.compat = \"%s\",\n", je->compat);
	fprintf(outfp, "\t.topic = \"%s\",\n", topic);
	if (je->long_desc && je->long_desc[0])
		fprintf(outfp, "\t.long_desc = \"%s\",\n", je->long_desc);
	if (je->pmu)
		fprintf(outfp, "\t.pmu = \"%s\",\n", je->pmu);
	if (je->unit)
		fprintf(outfp, "\t.unit = \"%s\",\n", je->unit);
	if (je->perpkg)
		fprintf(outfp, "\t.perpkg = \"%s\",\n", je->perpkg);
	if (je->aggr_mode)
		fprintf(outfp, "\t.aggr_mode = \"%d\",\n", convert(je->aggr_mode));
	if (je->metric_expr)
		fprintf(outfp, "\t.metric_expr = \"%s\",\n", je->metric_expr);
	if (je->metric_name)
		fprintf(outfp, "\t.metric_name = \"%s\",\n", je->metric_name);
	if (je->metric_group)
		fprintf(outfp, "\t.metric_group = \"%s\",\n", je->metric_group);
	if (je->deprecated)
		fprintf(outfp, "\t.deprecated = \"%s\",\n", je->deprecated);
	if (je->metric_constraint)
		fprintf(outfp, "\t.metric_constraint = \"%s\",\n", je->metric_constraint);
	fprintf(outfp, "},\n");

	return 0;
}

struct event_struct {
	struct list_head list;
	char *name;
	char *event;
	char *compat;
	char *desc;
	char *long_desc;
	char *pmu;
	char *unit;
	char *perpkg;
	char *aggr_mode;
	char *metric_expr;
	char *metric_name;
	char *metric_group;
	char *deprecated;
	char *metric_constraint;
};

#define ADD_EVENT_FIELD(field) do { if (je->field) {		\
	es->field = strdup(je->field);				\
	if (!es->field)						\
		goto out_free;					\
} } while (0)

#define FREE_EVENT_FIELD(field) free(es->field)

#define TRY_FIXUP_FIELD(field) do { if (es->field && !je->field) {\
	je->field = strdup(es->field);				\
	if (!je->field)						\
		return -ENOMEM;					\
} } while (0)

#define FOR_ALL_EVENT_STRUCT_FIELDS(op) do {			\
	op(name);						\
	op(event);						\
	op(desc);						\
	op(long_desc);						\
	op(pmu);						\
	op(unit);						\
	op(perpkg);						\
	op(aggr_mode);						\
	op(metric_expr);					\
	op(metric_name);					\
	op(metric_group);					\
	op(deprecated);						\
} while (0)

static LIST_HEAD(arch_std_events);

static void free_arch_std_events(void)
{
	struct event_struct *es, *next;

	list_for_each_entry_safe(es, next, &arch_std_events, list) {
		FOR_ALL_EVENT_STRUCT_FIELDS(FREE_EVENT_FIELD);
		list_del_init(&es->list);
		free(es);
	}
}

static int save_arch_std_events(void *data, struct json_event *je)
{
	struct event_struct *es;

	es = malloc(sizeof(*es));
	if (!es)
		return -ENOMEM;
	memset(es, 0, sizeof(*es));
	FOR_ALL_EVENT_STRUCT_FIELDS(ADD_EVENT_FIELD);
	list_add_tail(&es->list, &arch_std_events);
	return 0;
out_free:
	FOR_ALL_EVENT_STRUCT_FIELDS(FREE_EVENT_FIELD);
	free(es);
	return -ENOMEM;
}

static void print_events_table_suffix(FILE *outfp)
{
	fprintf(outfp, "{\n");

	fprintf(outfp, "\t.name = 0,\n");
	fprintf(outfp, "\t.event = 0,\n");
	fprintf(outfp, "\t.desc = 0,\n");

	fprintf(outfp, "},\n");
	fprintf(outfp, "};\n");
	close_table = 0;
}

static struct fixed {
	const char *name;
	const char *event;
} fixed[] = {
	{ "inst_retired.any", "event=0xc0,period=2000003" },
	{ "inst_retired.any_p", "event=0xc0,period=2000003" },
	{ "cpu_clk_unhalted.ref", "event=0x0,umask=0x03,period=2000003" },
	{ "cpu_clk_unhalted.thread", "event=0x3c,period=2000003" },
	{ "cpu_clk_unhalted.core", "event=0x3c,period=2000003" },
	{ "cpu_clk_unhalted.thread_any", "event=0x3c,any=1,period=2000003" },
	{ NULL, NULL},
};

/*
 * Handle different fixed counter encodings between JSON and perf.
 */
static char *real_event(const char *name, char *event)
{
	int i;

	if (!name)
		return NULL;

	for (i = 0; fixed[i].name; i++)
		if (!strcasecmp(name, fixed[i].name))
			return (char *)fixed[i].event;
	return event;
}

static int
try_fixup(const char *fn, char *arch_std, struct json_event *je, char **event)
{
	/* try to find matching event from arch standard values */
	struct event_struct *es;

	list_for_each_entry(es, &arch_std_events, list) {
		if (!strcmp(arch_std, es->name)) {
			FOR_ALL_EVENT_STRUCT_FIELDS(TRY_FIXUP_FIELD);
			*event = je->event;
			return 0;
		}
	}

	pr_err("%s: could not find matching %s for %s\n",
					prog, arch_std, fn);
	return -1;
}

/* Call func with each event in the json file */
static int json_events(const char *fn,
		int (*func)(void *data, struct json_event *je),
			void *data)
{
	int err;
	size_t size;
	jsmntok_t *tokens, *tok;
	int i, j, len;
	char *map;
	char buf[128];

	if (!fn)
		return -ENOENT;

	tokens = parse_json(fn, &map, &size, &len);
	if (!tokens)
		return -EIO;
	EXPECT(tokens->type == JSMN_ARRAY, tokens, "expected top level array");
	tok = tokens + 1;
	for (i = 0; i < tokens->size; i++) {
		char *event = NULL;
		char *extra_desc = NULL;
		char *filter = NULL;
		struct json_event je = {};
		char *arch_std = NULL;
		unsigned long long eventcode = 0;
		struct msrmap *msr = NULL;
		jsmntok_t *msrval = NULL;
		jsmntok_t *precise = NULL;
		jsmntok_t *obj = tok++;

		EXPECT(obj->type == JSMN_OBJECT, obj, "expected object");
		for (j = 0; j < obj->size; j += 2) {
			jsmntok_t *field, *val;
			int nz;
			char *s;

			field = tok + j;
			EXPECT(field->type == JSMN_STRING, tok + j,
			       "Expected field name");
			val = tok + j + 1;
			EXPECT(val->type == JSMN_STRING, tok + j + 1,
			       "Expected string value");

			nz = !json_streq(map, val, "0");
			if (match_field(map, field, nz, &event, val)) {
				/* ok */
			} else if (json_streq(map, field, "EventCode")) {
				char *code = NULL;
				addfield(map, &code, "", "", val);
				eventcode |= strtoul(code, NULL, 0);
				free(code);
			} else if (json_streq(map, field, "ExtSel")) {
				char *code = NULL;
				addfield(map, &code, "", "", val);
				eventcode |= strtoul(code, NULL, 0) << 21;
				free(code);
			} else if (json_streq(map, field, "EventName")) {
				addfield(map, &je.name, "", "", val);
			} else if (json_streq(map, field, "Compat")) {
				addfield(map, &je.compat, "", "", val);
			} else if (json_streq(map, field, "BriefDescription")) {
				addfield(map, &je.desc, "", "", val);
				fixdesc(je.desc);
			} else if (json_streq(map, field,
					     "PublicDescription")) {
				addfield(map, &je.long_desc, "", "", val);
				fixdesc(je.long_desc);
			} else if (json_streq(map, field, "PEBS") && nz) {
				precise = val;
			} else if (json_streq(map, field, "MSRIndex") && nz) {
				msr = lookup_msr(map, val);
			} else if (json_streq(map, field, "MSRValue")) {
				msrval = val;
			} else if (json_streq(map, field, "Errata") &&
				   !json_streq(map, val, "null")) {
				addfield(map, &extra_desc, ". ",
					" Spec update: ", val);
			} else if (json_streq(map, field, "Data_LA") && nz) {
				addfield(map, &extra_desc, ". ",
					" Supports address when precise",
					NULL);
			} else if (json_streq(map, field, "Unit")) {
				const char *ppmu;

				ppmu = field_to_perf(unit_to_pmu, map, val);
				if (ppmu) {
					je.pmu = strdup(ppmu);
				} else {
					if (!je.pmu)
						je.pmu = strdup("uncore_");
					addfield(map, &je.pmu, "", "", val);
					for (s = je.pmu; *s; s++)
						*s = tolower(*s);
				}
				addfield(map, &je.desc, ". ", "Unit: ", NULL);
				addfield(map, &je.desc, "", je.pmu, NULL);
				addfield(map, &je.desc, "", " ", NULL);
			} else if (json_streq(map, field, "Filter")) {
				addfield(map, &filter, "", "", val);
			} else if (json_streq(map, field, "ScaleUnit")) {
				addfield(map, &je.unit, "", "", val);
			} else if (json_streq(map, field, "PerPkg")) {
				addfield(map, &je.perpkg, "", "", val);
			} else if (json_streq(map, field, "AggregationMode")) {
				addfield(map, &je.aggr_mode, "", "", val);
			} else if (json_streq(map, field, "Deprecated")) {
				addfield(map, &je.deprecated, "", "", val);
			} else if (json_streq(map, field, "MetricName")) {
				addfield(map, &je.metric_name, "", "", val);
			} else if (json_streq(map, field, "MetricGroup")) {
				addfield(map, &je.metric_group, "", "", val);
			} else if (json_streq(map, field, "MetricConstraint")) {
				addfield(map, &je.metric_constraint, "", "", val);
			} else if (json_streq(map, field, "MetricExpr")) {
				addfield(map, &je.metric_expr, "", "", val);
				for (s = je.metric_expr; *s; s++)
					*s = tolower(*s);
			} else if (json_streq(map, field, "ArchStdEvent")) {
				addfield(map, &arch_std, "", "", val);
				for (s = arch_std; *s; s++)
					*s = tolower(*s);
			}
			/* ignore unknown fields */
		}
		if (precise && je.desc && !strstr(je.desc, "(Precise Event)")) {
			if (json_streq(map, precise, "2"))
				addfield(map, &extra_desc, " ",
						"(Must be precise)", NULL);
			else
				addfield(map, &extra_desc, " ",
						"(Precise event)", NULL);
		}
		snprintf(buf, sizeof buf, "event=%#llx", eventcode);
		addfield(map, &event, ",", buf, NULL);
		if (je.desc && extra_desc)
			addfield(map, &je.desc, " ", extra_desc, NULL);
		if (je.long_desc && extra_desc)
			addfield(map, &je.long_desc, " ", extra_desc, NULL);
		if (filter)
			addfield(map, &event, ",", filter, NULL);
		if (msr != NULL)
			addfield(map, &event, ",", msr->pname, msrval);
		if (je.name)
			fixname(je.name);

		if (arch_std) {
			/*
			 * An arch standard event is referenced, so try to
			 * fixup any unassigned values.
			 */
			err = try_fixup(fn, arch_std, &je, &event);
			if (err)
				goto free_strings;
		}
		je.event = real_event(je.name, event);
		err = func(data, &je);
free_strings:
		free(event);
		free(je.desc);
		free(je.name);
		free(je.compat);
		free(je.long_desc);
		free(extra_desc);
		free(je.pmu);
		free(filter);
		free(je.perpkg);
		free(je.aggr_mode);
		free(je.deprecated);
		free(je.unit);
		free(je.metric_expr);
		free(je.metric_name);
		free(je.metric_group);
		free(je.metric_constraint);
		free(arch_std);

		if (err)
			break;
		tok += j;
	}
	EXPECT(tok - tokens == len, tok, "unexpected objects at end");
	err = 0;
out_free:
	free_json(map, size, tokens);
	return err;
}

static char *file_name_to_table_name(char *fname)
{
	unsigned int i;
	int n;
	int c;
	char *tblname;

	/*
	 * Ensure tablename starts with alphabetic character.
	 * Derive rest of table name from basename of the JSON file,
	 * replacing hyphens and stripping out .json suffix.
	 */
	n = asprintf(&tblname, "pme_%s", fname);
	if (n < 0) {
		pr_info("%s: asprintf() error %s for file %s\n", prog,
				strerror(errno), fname);
		return NULL;
	}

	for (i = 0; i < strlen(tblname); i++) {
		c = tblname[i];

		if (c == '-' || c == '/')
			tblname[i] = '_';
		else if (c == '.') {
			tblname[i] = '\0';
			break;
		} else if (!isalnum(c) && c != '_') {
			pr_err("%s: Invalid character '%c' in file name %s\n",
					prog, c, basename(fname));
			free(tblname);
			tblname = NULL;
			break;
		}
	}

	return tblname;
}

static bool is_sys_dir(char *fname)
{
	size_t len = strlen(fname), len2 = strlen("/sys");

	if (len2 > len)
		return false;
	return !strcmp(fname+len-len2, "/sys");
}

static void print_mapping_table_prefix(FILE *outfp)
{
	fprintf(outfp, "struct pmu_events_map pmu_events_map[] = {\n");
}

static void print_mapping_table_suffix(FILE *outfp)
{
	/*
	 * Print the terminating, NULL entry.
	 */
	fprintf(outfp, "{\n");
	fprintf(outfp, "\t.cpuid = 0,\n");
	fprintf(outfp, "\t.version = 0,\n");
	fprintf(outfp, "\t.type = 0,\n");
	fprintf(outfp, "\t.table = 0,\n");
	fprintf(outfp, "},\n");

	/* and finally, the closing curly bracket for the struct */
	fprintf(outfp, "};\n");
}

static void print_mapping_test_table(FILE *outfp)
{
	/*
	 * Print the terminating, NULL entry.
	 */
	fprintf(outfp, "{\n");
	fprintf(outfp, "\t.cpuid = \"testcpu\",\n");
	fprintf(outfp, "\t.version = \"v1\",\n");
	fprintf(outfp, "\t.type = \"core\",\n");
	fprintf(outfp, "\t.table = pme_test_cpu,\n");
	fprintf(outfp, "},\n");
}

static void print_system_event_mapping_table_prefix(FILE *outfp)
{
	fprintf(outfp, "\nstruct pmu_sys_events pmu_sys_event_tables[] = {");
}

static void print_system_event_mapping_table_suffix(FILE *outfp)
{
	fprintf(outfp, "\n\t{\n\t\t.table = 0\n\t},");
	fprintf(outfp, "\n};\n");
}

static int process_system_event_tables(FILE *outfp)
{
	struct sys_event_table *sys_event_table;

	print_system_event_mapping_table_prefix(outfp);

	list_for_each_entry(sys_event_table, &sys_event_tables, list) {
		fprintf(outfp, "\n\t{\n\t\t.table = %s,\n\t},",
			sys_event_table->soc_id);
	}

	print_system_event_mapping_table_suffix(outfp);

	return 0;
}

static int process_mapfile(FILE *outfp, char *fpath)
{
	int n = 16384;
	FILE *mapfp;
	char *save = NULL;
	char *line, *p;
	int line_num;
	char *tblname;
	int ret = 0;

	pr_info("%s: Processing mapfile %s\n", prog, fpath);

	line = malloc(n);
	if (!line)
		return -1;

	mapfp = fopen(fpath, "r");
	if (!mapfp) {
		pr_info("%s: Error %s opening %s\n", prog, strerror(errno),
				fpath);
		free(line);
		return -1;
	}

	print_mapping_table_prefix(outfp);

	/* Skip first line (header) */
	p = fgets(line, n, mapfp);
	if (!p)
		goto out;

	line_num = 1;
	while (1) {
		char *cpuid, *version, *type, *fname;

		line_num++;
		p = fgets(line, n, mapfp);
		if (!p)
			break;

		if (line[0] == '#' || line[0] == '\n')
			continue;

		if (line[strlen(line)-1] != '\n') {
			/* TODO Deal with lines longer than 16K */
			pr_info("%s: Mapfile %s: line %d too long, aborting\n",
					prog, fpath, line_num);
			ret = -1;
			goto out;
		}
		line[strlen(line)-1] = '\0';

		cpuid = fixregex(strtok_r(p, ",", &save));
		version = strtok_r(NULL, ",", &save);
		fname = strtok_r(NULL, ",", &save);
		type = strtok_r(NULL, ",", &save);

		tblname = file_name_to_table_name(fname);
		fprintf(outfp, "{\n");
		fprintf(outfp, "\t.cpuid = \"%s\",\n", cpuid);
		fprintf(outfp, "\t.version = \"%s\",\n", version);
		fprintf(outfp, "\t.type = \"%s\",\n", type);

		/*
		 * CHECK: We can't use the type (eg "core") field in the
		 * table name. For us to do that, we need to somehow tweak
		 * the other caller of file_name_to_table(), process_json()
		 * to determine the type. process_json() file has no way
		 * of knowing these are "core" events unless file name has
		 * core in it. If filename has core in it, we can safely
		 * ignore the type field here also.
		 */
		fprintf(outfp, "\t.table = %s\n", tblname);
		fprintf(outfp, "},\n");
	}

out:
	print_mapping_test_table(outfp);
	print_mapping_table_suffix(outfp);
	fclose(mapfp);
	free(line);
	return ret;
}

/*
 * If we fail to locate/process JSON and map files, create a NULL mapping
 * table. This would at least allow perf to build even if we can't find/use
 * the aliases.
 */
static void create_empty_mapping(const char *output_file)
{
	FILE *outfp;

	pr_info("%s: Creating empty pmu_events_map[] table\n", prog);

	/* Truncate file to clear any partial writes to it */
	outfp = fopen(output_file, "w");
	if (!outfp) {
		perror("fopen()");
		_Exit(1);
	}

	fprintf(outfp, "#include \"pmu-events/pmu-events.h\"\n");
	print_mapping_table_prefix(outfp);
	print_mapping_table_suffix(outfp);
	print_system_event_mapping_table_prefix(outfp);
	print_system_event_mapping_table_suffix(outfp);
	fclose(outfp);
}

static int get_maxfds(void)
{
	struct rlimit rlim;

	if (getrlimit(RLIMIT_NOFILE, &rlim) == 0)
		return min((int)rlim.rlim_max / 2, 512);

	return 512;
}

/*
 * nftw() doesn't let us pass an argument to the processing function,
 * so use a global variables.
 */
static FILE *eventsfp;
static char *mapfile;

static int is_leaf_dir(const char *fpath)
{
	DIR *d;
	struct dirent *dir;
	int res = 1;

	d = opendir(fpath);
	if (!d)
		return 0;

	while ((dir = readdir(d)) != NULL) {
		if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
			continue;

		if (dir->d_type == DT_DIR) {
			res = 0;
			break;
		} else if (dir->d_type == DT_UNKNOWN) {
			char path[PATH_MAX];
			struct stat st;

			sprintf(path, "%s/%s", fpath, dir->d_name);
			if (stat(path, &st))
				break;

			if (S_ISDIR(st.st_mode)) {
				res = 0;
				break;
			}
		}
	}

	closedir(d);

	return res;
}

static int is_json_file(const char *name)
{
	const char *suffix;

	if (strlen(name) < 5)
		return 0;

	suffix = name + strlen(name) - 5;

	if (strncmp(suffix, ".json", 5) == 0)
		return 1;
	return 0;
}

static int preprocess_arch_std_files(const char *fpath, const struct stat *sb,
				int typeflag, struct FTW *ftwbuf)
{
	int level = ftwbuf->level;
	int is_file = typeflag == FTW_F;

	if (level == 1 && is_file && is_json_file(fpath))
		return json_events(fpath, save_arch_std_events, (void *)sb);

	return 0;
}

static int process_one_file(const char *fpath, const struct stat *sb,
			    int typeflag, struct FTW *ftwbuf)
{
	char *tblname, *bname;
	int is_dir  = typeflag == FTW_D;
	int is_file = typeflag == FTW_F;
	int level   = ftwbuf->level;
	int err = 0;

	if (level >= 2 && is_dir) {
		int count = 0;
		/*
		 * For level 2 directory, bname will include parent name,
		 * like vendor/platform. So search back from platform dir
		 * to find this.
		 * Something similar for level 3 directory, but we're a PMU
		 * category folder, like vendor/platform/cpu.
		 */
		bname = (char *) fpath + ftwbuf->base - 2;
		for (;;) {
			if (*bname == '/')
				count++;
			if (count == level - 1)
				break;
			bname--;
		}
		bname++;
	} else
		bname = (char *) fpath + ftwbuf->base;

	pr_debug("%s %d %7jd %-20s %s\n",
		 is_file ? "f" : is_dir ? "d" : "x",
		 level, sb->st_size, bname, fpath);

	/* base dir or too deep */
	if (level == 0 || level > 4)
		return 0;


	/* model directory, reset topic */
	if ((level == 1 && is_dir && is_leaf_dir(fpath)) ||
	    (level >= 2 && is_dir && is_leaf_dir(fpath))) {
		if (close_table)
			print_events_table_suffix(eventsfp);

		/*
		 * Drop file name suffix. Replace hyphens with underscores.
		 * Fail if file name contains any alphanum characters besides
		 * underscores.
		 */
		tblname = file_name_to_table_name(bname);
		if (!tblname) {
			pr_info("%s: Error determining table name for %s\n", prog,
				bname);
			return -1;
		}

		if (is_sys_dir(bname)) {
			struct sys_event_table *sys_event_table;

			sys_event_table = malloc(sizeof(*sys_event_table));
			if (!sys_event_table)
				return -1;

			sys_event_table->soc_id = strdup(tblname);
			if (!sys_event_table->soc_id) {
				free(sys_event_table);
				return -1;
			}
			list_add_tail(&sys_event_table->list,
				      &sys_event_tables);
		}

		print_events_table_prefix(eventsfp, tblname);
		return 0;
	}

	/*
	 * Save the mapfile name for now. We will process mapfile
	 * after processing all JSON files (so we can write out the
	 * mapping table after all PMU events tables).
	 *
	 */
	if (level == 1 && is_file) {
		if (!strcmp(bname, "mapfile.csv")) {
			mapfile = strdup(fpath);
			return 0;
		}
		if (is_json_file(bname))
			pr_debug("%s: ArchStd json is preprocessed %s\n", prog, fpath);
		else
			pr_info("%s: Ignoring file %s\n", prog, fpath);
		return 0;
	}

	/*
	 * If the file name does not have a .json extension,
	 * ignore it. It could be a readme.txt for instance.
	 */
	if (is_file) {
		if (!is_json_file(bname)) {
			pr_info("%s: Ignoring file without .json suffix %s\n", prog,
				fpath);
			return 0;
		}
	}

	if (level > 1 && add_topic(bname))
		return -ENOMEM;

	/*
	 * Assume all other files are JSON files.
	 *
	 * If mapfile refers to 'power7_core.json', we create a table
	 * named 'power7_core'. Any inconsistencies between the mapfile
	 * and directory tree could result in build failure due to table
	 * names not being found.
	 *
	 * At least for now, be strict with processing JSON file names.
	 * i.e. if JSON file name cannot be mapped to C-style table name,
	 * fail.
	 */
	if (is_file) {
		struct perf_entry_data data = {
			.topic = get_topic(),
			.outfp = eventsfp,
		};

		err = json_events(fpath, print_events_table_entry, &data);

		free(data.topic);
	}

	return err;
}

#ifndef PATH_MAX
#define PATH_MAX	4096
#endif

/*
 * Starting in directory 'start_dirname', find the "mapfile.csv" and
 * the set of JSON files for the architecture 'arch'.
 *
 * From each JSON file, create a C-style "PMU events table" from the
 * JSON file (see struct pmu_event).
 *
 * From the mapfile, create a mapping between the CPU revisions and
 * PMU event tables (see struct pmu_events_map).
 *
 * Write out the PMU events tables and the mapping table to pmu-event.c.
 */
int main(int argc, char *argv[])
{
	int rc, ret = 0, empty_map = 0;
	int maxfds;
	char ldirname[PATH_MAX];
	const char *arch;
	const char *output_file;
	const char *start_dirname;
	char *err_string_ext = "";
	struct stat stbuf;

	prog = basename(argv[0]);
	if (argc < 4) {
		pr_err("Usage: %s <arch> <starting_dir> <output_file>\n", prog);
		return 1;
	}

	arch = argv[1];
	start_dirname = argv[2];
	output_file = argv[3];

	if (argc > 4)
		verbose = atoi(argv[4]);

	eventsfp = fopen(output_file, "w");
	if (!eventsfp) {
		pr_err("%s Unable to create required file %s (%s)\n",
				prog, output_file, strerror(errno));
		return 2;
	}

	sprintf(ldirname, "%s/%s", start_dirname, arch);

	/* If architecture does not have any event lists, bail out */
	if (stat(ldirname, &stbuf) < 0) {
		pr_info("%s: Arch %s has no PMU event lists\n", prog, arch);
		empty_map = 1;
		goto err_close_eventsfp;
	}

	/* Include pmu-events.h first */
	fprintf(eventsfp, "#include \"pmu-events/pmu-events.h\"\n");

	/*
	 * The mapfile allows multiple CPUids to point to the same JSON file,
	 * so, not sure if there is a need for symlinks within the pmu-events
	 * directory.
	 *
	 * For now, treat symlinks of JSON files as regular files and create
	 * separate tables for each symlink (presumably, each symlink refers
	 * to specific version of the CPU).
	 */

	maxfds = get_maxfds();
	rc = nftw(ldirname, preprocess_arch_std_files, maxfds, 0);
	if (rc)
		goto err_processing_std_arch_event_dir;

	rc = nftw(ldirname, process_one_file, maxfds, 0);
	if (rc)
		goto err_processing_dir;

	sprintf(ldirname, "%s/test", start_dirname);

	rc = nftw(ldirname, preprocess_arch_std_files, maxfds, 0);
	if (rc)
		goto err_processing_std_arch_event_dir;

	rc = nftw(ldirname, process_one_file, maxfds, 0);
	if (rc)
		goto err_processing_dir;

	if (close_table)
		print_events_table_suffix(eventsfp);

	if (!mapfile) {
		pr_info("%s: No CPU->JSON mapping?\n", prog);
		empty_map = 1;
		goto err_close_eventsfp;
	}

	rc = process_mapfile(eventsfp, mapfile);
	if (rc) {
		pr_info("%s: Error processing mapfile %s\n", prog, mapfile);
		/* Make build fail */
		ret = 1;
		goto err_close_eventsfp;
	}

	rc = process_system_event_tables(eventsfp);
	fclose(eventsfp);
	if (rc) {
		ret = 1;
		goto err_out;
	}

	free_arch_std_events();
	free(mapfile);
	return 0;

err_processing_std_arch_event_dir:
	err_string_ext = " for std arch event";
err_processing_dir:
	if (verbose) {
		pr_info("%s: Error walking file tree %s%s\n", prog, ldirname,
			err_string_ext);
		empty_map = 1;
	} else if (rc < 0) {
		ret = 1;
	} else {
		empty_map = 1;
	}
err_close_eventsfp:
	fclose(eventsfp);
	if (empty_map)
		create_empty_mapping(output_file);
err_out:
	free_arch_std_events();
	free(mapfile);
	return ret;
}