1 // SPDX-License-Identifier: GPL-2.0
2 #include "cpumap.h"
3 #include "debug.h"
4 #include "env.h"
5 #include "util/header.h"
6 #include "linux/compiler.h"
7 #include <linux/ctype.h>
8 #include <linux/zalloc.h>
9 #include "cgroup.h"
10 #include <errno.h>
11 #include <sys/utsname.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include "pmus.h"
15 #include "strbuf.h"
16 #include "trace/beauty/beauty.h"
17
18 struct perf_env perf_env;
19
20 #ifdef HAVE_LIBBPF_SUPPORT
21 #include "bpf-event.h"
22 #include "bpf-utils.h"
23 #include <bpf/libbpf.h>
24
perf_env__insert_bpf_prog_info(struct perf_env * env,struct bpf_prog_info_node * info_node)25 void perf_env__insert_bpf_prog_info(struct perf_env *env,
26 struct bpf_prog_info_node *info_node)
27 {
28 down_write(&env->bpf_progs.lock);
29 __perf_env__insert_bpf_prog_info(env, info_node);
30 up_write(&env->bpf_progs.lock);
31 }
32
__perf_env__insert_bpf_prog_info(struct perf_env * env,struct bpf_prog_info_node * info_node)33 void __perf_env__insert_bpf_prog_info(struct perf_env *env, struct bpf_prog_info_node *info_node)
34 {
35 __u32 prog_id = info_node->info_linear->info.id;
36 struct bpf_prog_info_node *node;
37 struct rb_node *parent = NULL;
38 struct rb_node **p;
39
40 p = &env->bpf_progs.infos.rb_node;
41
42 while (*p != NULL) {
43 parent = *p;
44 node = rb_entry(parent, struct bpf_prog_info_node, rb_node);
45 if (prog_id < node->info_linear->info.id) {
46 p = &(*p)->rb_left;
47 } else if (prog_id > node->info_linear->info.id) {
48 p = &(*p)->rb_right;
49 } else {
50 pr_debug("duplicated bpf prog info %u\n", prog_id);
51 return;
52 }
53 }
54
55 rb_link_node(&info_node->rb_node, parent, p);
56 rb_insert_color(&info_node->rb_node, &env->bpf_progs.infos);
57 env->bpf_progs.infos_cnt++;
58 }
59
perf_env__find_bpf_prog_info(struct perf_env * env,__u32 prog_id)60 struct bpf_prog_info_node *perf_env__find_bpf_prog_info(struct perf_env *env,
61 __u32 prog_id)
62 {
63 struct bpf_prog_info_node *node = NULL;
64 struct rb_node *n;
65
66 down_read(&env->bpf_progs.lock);
67 n = env->bpf_progs.infos.rb_node;
68
69 while (n) {
70 node = rb_entry(n, struct bpf_prog_info_node, rb_node);
71 if (prog_id < node->info_linear->info.id)
72 n = n->rb_left;
73 else if (prog_id > node->info_linear->info.id)
74 n = n->rb_right;
75 else
76 goto out;
77 }
78 node = NULL;
79
80 out:
81 up_read(&env->bpf_progs.lock);
82 return node;
83 }
84
perf_env__insert_btf(struct perf_env * env,struct btf_node * btf_node)85 bool perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node)
86 {
87 bool ret;
88
89 down_write(&env->bpf_progs.lock);
90 ret = __perf_env__insert_btf(env, btf_node);
91 up_write(&env->bpf_progs.lock);
92 return ret;
93 }
94
__perf_env__insert_btf(struct perf_env * env,struct btf_node * btf_node)95 bool __perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node)
96 {
97 struct rb_node *parent = NULL;
98 __u32 btf_id = btf_node->id;
99 struct btf_node *node;
100 struct rb_node **p;
101
102 p = &env->bpf_progs.btfs.rb_node;
103
104 while (*p != NULL) {
105 parent = *p;
106 node = rb_entry(parent, struct btf_node, rb_node);
107 if (btf_id < node->id) {
108 p = &(*p)->rb_left;
109 } else if (btf_id > node->id) {
110 p = &(*p)->rb_right;
111 } else {
112 pr_debug("duplicated btf %u\n", btf_id);
113 return false;
114 }
115 }
116
117 rb_link_node(&btf_node->rb_node, parent, p);
118 rb_insert_color(&btf_node->rb_node, &env->bpf_progs.btfs);
119 env->bpf_progs.btfs_cnt++;
120 return true;
121 }
122
perf_env__find_btf(struct perf_env * env,__u32 btf_id)123 struct btf_node *perf_env__find_btf(struct perf_env *env, __u32 btf_id)
124 {
125 struct btf_node *res;
126
127 down_read(&env->bpf_progs.lock);
128 res = __perf_env__find_btf(env, btf_id);
129 up_read(&env->bpf_progs.lock);
130 return res;
131 }
132
__perf_env__find_btf(struct perf_env * env,__u32 btf_id)133 struct btf_node *__perf_env__find_btf(struct perf_env *env, __u32 btf_id)
134 {
135 struct btf_node *node = NULL;
136 struct rb_node *n;
137
138 n = env->bpf_progs.btfs.rb_node;
139
140 while (n) {
141 node = rb_entry(n, struct btf_node, rb_node);
142 if (btf_id < node->id)
143 n = n->rb_left;
144 else if (btf_id > node->id)
145 n = n->rb_right;
146 else
147 return node;
148 }
149 return NULL;
150 }
151
152 /* purge data in bpf_progs.infos tree */
perf_env__purge_bpf(struct perf_env * env)153 static void perf_env__purge_bpf(struct perf_env *env)
154 {
155 struct rb_root *root;
156 struct rb_node *next;
157
158 down_write(&env->bpf_progs.lock);
159
160 root = &env->bpf_progs.infos;
161 next = rb_first(root);
162
163 while (next) {
164 struct bpf_prog_info_node *node;
165
166 node = rb_entry(next, struct bpf_prog_info_node, rb_node);
167 next = rb_next(&node->rb_node);
168 rb_erase(&node->rb_node, root);
169 zfree(&node->info_linear);
170 free(node);
171 }
172
173 env->bpf_progs.infos_cnt = 0;
174
175 root = &env->bpf_progs.btfs;
176 next = rb_first(root);
177
178 while (next) {
179 struct btf_node *node;
180
181 node = rb_entry(next, struct btf_node, rb_node);
182 next = rb_next(&node->rb_node);
183 rb_erase(&node->rb_node, root);
184 free(node);
185 }
186
187 env->bpf_progs.btfs_cnt = 0;
188
189 up_write(&env->bpf_progs.lock);
190 }
191 #else // HAVE_LIBBPF_SUPPORT
perf_env__purge_bpf(struct perf_env * env __maybe_unused)192 static void perf_env__purge_bpf(struct perf_env *env __maybe_unused)
193 {
194 }
195 #endif // HAVE_LIBBPF_SUPPORT
196
perf_env__exit(struct perf_env * env)197 void perf_env__exit(struct perf_env *env)
198 {
199 int i, j;
200
201 perf_env__purge_bpf(env);
202 perf_env__purge_cgroups(env);
203 zfree(&env->hostname);
204 zfree(&env->os_release);
205 zfree(&env->version);
206 zfree(&env->arch);
207 zfree(&env->cpu_desc);
208 zfree(&env->cpuid);
209 zfree(&env->cmdline);
210 zfree(&env->cmdline_argv);
211 zfree(&env->sibling_dies);
212 zfree(&env->sibling_cores);
213 zfree(&env->sibling_threads);
214 zfree(&env->pmu_mappings);
215 zfree(&env->cpu);
216 for (i = 0; i < env->nr_cpu_pmu_caps; i++)
217 zfree(&env->cpu_pmu_caps[i]);
218 zfree(&env->cpu_pmu_caps);
219 zfree(&env->numa_map);
220
221 for (i = 0; i < env->nr_numa_nodes; i++)
222 perf_cpu_map__put(env->numa_nodes[i].map);
223 zfree(&env->numa_nodes);
224
225 for (i = 0; i < env->caches_cnt; i++)
226 cpu_cache_level__free(&env->caches[i]);
227 zfree(&env->caches);
228
229 for (i = 0; i < env->nr_memory_nodes; i++)
230 zfree(&env->memory_nodes[i].set);
231 zfree(&env->memory_nodes);
232
233 for (i = 0; i < env->nr_hybrid_nodes; i++) {
234 zfree(&env->hybrid_nodes[i].pmu_name);
235 zfree(&env->hybrid_nodes[i].cpus);
236 }
237 zfree(&env->hybrid_nodes);
238
239 for (i = 0; i < env->nr_pmus_with_caps; i++) {
240 for (j = 0; j < env->pmu_caps[i].nr_caps; j++)
241 zfree(&env->pmu_caps[i].caps[j]);
242 zfree(&env->pmu_caps[i].caps);
243 zfree(&env->pmu_caps[i].pmu_name);
244 }
245 zfree(&env->pmu_caps);
246 }
247
perf_env__init(struct perf_env * env)248 void perf_env__init(struct perf_env *env)
249 {
250 #ifdef HAVE_LIBBPF_SUPPORT
251 env->bpf_progs.infos = RB_ROOT;
252 env->bpf_progs.btfs = RB_ROOT;
253 init_rwsem(&env->bpf_progs.lock);
254 #endif
255 env->kernel_is_64_bit = -1;
256 }
257
perf_env__init_kernel_mode(struct perf_env * env)258 static void perf_env__init_kernel_mode(struct perf_env *env)
259 {
260 const char *arch = perf_env__raw_arch(env);
261
262 if (!strncmp(arch, "x86_64", 6) || !strncmp(arch, "aarch64", 7) ||
263 !strncmp(arch, "arm64", 5) || !strncmp(arch, "mips64", 6) ||
264 !strncmp(arch, "parisc64", 8) || !strncmp(arch, "riscv64", 7) ||
265 !strncmp(arch, "s390x", 5) || !strncmp(arch, "sparc64", 7))
266 env->kernel_is_64_bit = 1;
267 else
268 env->kernel_is_64_bit = 0;
269 }
270
perf_env__kernel_is_64_bit(struct perf_env * env)271 int perf_env__kernel_is_64_bit(struct perf_env *env)
272 {
273 if (env->kernel_is_64_bit == -1)
274 perf_env__init_kernel_mode(env);
275
276 return env->kernel_is_64_bit;
277 }
278
perf_env__set_cmdline(struct perf_env * env,int argc,const char * argv[])279 int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
280 {
281 int i;
282
283 /* do not include NULL termination */
284 env->cmdline_argv = calloc(argc, sizeof(char *));
285 if (env->cmdline_argv == NULL)
286 goto out_enomem;
287
288 /*
289 * Must copy argv contents because it gets moved around during option
290 * parsing:
291 */
292 for (i = 0; i < argc ; i++) {
293 env->cmdline_argv[i] = argv[i];
294 if (env->cmdline_argv[i] == NULL)
295 goto out_free;
296 }
297
298 env->nr_cmdline = argc;
299
300 return 0;
301 out_free:
302 zfree(&env->cmdline_argv);
303 out_enomem:
304 return -ENOMEM;
305 }
306
perf_env__read_cpu_topology_map(struct perf_env * env)307 int perf_env__read_cpu_topology_map(struct perf_env *env)
308 {
309 int idx, nr_cpus;
310
311 if (env->cpu != NULL)
312 return 0;
313
314 if (env->nr_cpus_avail == 0)
315 env->nr_cpus_avail = cpu__max_present_cpu().cpu;
316
317 nr_cpus = env->nr_cpus_avail;
318 if (nr_cpus == -1)
319 return -EINVAL;
320
321 env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
322 if (env->cpu == NULL)
323 return -ENOMEM;
324
325 for (idx = 0; idx < nr_cpus; ++idx) {
326 struct perf_cpu cpu = { .cpu = idx };
327
328 env->cpu[idx].core_id = cpu__get_core_id(cpu);
329 env->cpu[idx].socket_id = cpu__get_socket_id(cpu);
330 env->cpu[idx].die_id = cpu__get_die_id(cpu);
331 }
332
333 env->nr_cpus_avail = nr_cpus;
334 return 0;
335 }
336
perf_env__read_pmu_mappings(struct perf_env * env)337 int perf_env__read_pmu_mappings(struct perf_env *env)
338 {
339 struct perf_pmu *pmu = NULL;
340 u32 pmu_num = 0;
341 struct strbuf sb;
342
343 while ((pmu = perf_pmus__scan(pmu)))
344 pmu_num++;
345
346 if (!pmu_num) {
347 pr_debug("pmu mappings not available\n");
348 return -ENOENT;
349 }
350 env->nr_pmu_mappings = pmu_num;
351
352 if (strbuf_init(&sb, 128 * pmu_num) < 0)
353 return -ENOMEM;
354
355 while ((pmu = perf_pmus__scan(pmu))) {
356 if (strbuf_addf(&sb, "%u:%s", pmu->type, pmu->name) < 0)
357 goto error;
358 /* include a NULL character at the end */
359 if (strbuf_add(&sb, "", 1) < 0)
360 goto error;
361 }
362
363 env->pmu_mappings = strbuf_detach(&sb, NULL);
364
365 return 0;
366
367 error:
368 strbuf_release(&sb);
369 return -1;
370 }
371
perf_env__read_cpuid(struct perf_env * env)372 int perf_env__read_cpuid(struct perf_env *env)
373 {
374 char cpuid[128];
375 int err = get_cpuid(cpuid, sizeof(cpuid));
376
377 if (err)
378 return err;
379
380 free(env->cpuid);
381 env->cpuid = strdup(cpuid);
382 if (env->cpuid == NULL)
383 return ENOMEM;
384 return 0;
385 }
386
perf_env__read_arch(struct perf_env * env)387 static int perf_env__read_arch(struct perf_env *env)
388 {
389 struct utsname uts;
390
391 if (env->arch)
392 return 0;
393
394 if (!uname(&uts))
395 env->arch = strdup(uts.machine);
396
397 return env->arch ? 0 : -ENOMEM;
398 }
399
perf_env__read_nr_cpus_avail(struct perf_env * env)400 static int perf_env__read_nr_cpus_avail(struct perf_env *env)
401 {
402 if (env->nr_cpus_avail == 0)
403 env->nr_cpus_avail = cpu__max_present_cpu().cpu;
404
405 return env->nr_cpus_avail ? 0 : -ENOENT;
406 }
407
perf_env__raw_arch(struct perf_env * env)408 const char *perf_env__raw_arch(struct perf_env *env)
409 {
410 return env && !perf_env__read_arch(env) ? env->arch : "unknown";
411 }
412
perf_env__nr_cpus_avail(struct perf_env * env)413 int perf_env__nr_cpus_avail(struct perf_env *env)
414 {
415 return env && !perf_env__read_nr_cpus_avail(env) ? env->nr_cpus_avail : 0;
416 }
417
cpu_cache_level__free(struct cpu_cache_level * cache)418 void cpu_cache_level__free(struct cpu_cache_level *cache)
419 {
420 zfree(&cache->type);
421 zfree(&cache->map);
422 zfree(&cache->size);
423 }
424
425 /*
426 * Return architecture name in a normalized form.
427 * The conversion logic comes from the Makefile.
428 */
normalize_arch(char * arch)429 static const char *normalize_arch(char *arch)
430 {
431 if (!strcmp(arch, "x86_64"))
432 return "x86";
433 if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
434 return "x86";
435 if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
436 return "sparc";
437 if (!strncmp(arch, "aarch64", 7) || !strncmp(arch, "arm64", 5))
438 return "arm64";
439 if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
440 return "arm";
441 if (!strncmp(arch, "s390", 4))
442 return "s390";
443 if (!strncmp(arch, "parisc", 6))
444 return "parisc";
445 if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
446 return "powerpc";
447 if (!strncmp(arch, "mips", 4))
448 return "mips";
449 if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
450 return "sh";
451 if (!strncmp(arch, "loongarch", 9))
452 return "loongarch";
453
454 return arch;
455 }
456
perf_env__arch(struct perf_env * env)457 const char *perf_env__arch(struct perf_env *env)
458 {
459 char *arch_name;
460
461 if (!env || !env->arch) { /* Assume local operation */
462 static struct utsname uts = { .machine[0] = '\0', };
463 if (uts.machine[0] == '\0' && uname(&uts) < 0)
464 return NULL;
465 arch_name = uts.machine;
466 } else
467 arch_name = env->arch;
468
469 return normalize_arch(arch_name);
470 }
471
perf_env__arch_strerrno(struct perf_env * env __maybe_unused,int err __maybe_unused)472 const char *perf_env__arch_strerrno(struct perf_env *env __maybe_unused, int err __maybe_unused)
473 {
474 #if defined(HAVE_SYSCALL_TABLE_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
475 if (env->arch_strerrno == NULL)
476 env->arch_strerrno = arch_syscalls__strerrno_function(perf_env__arch(env));
477
478 return env->arch_strerrno ? env->arch_strerrno(err) : "no arch specific strerrno function";
479 #else
480 return "!(HAVE_SYSCALL_TABLE_SUPPORT && HAVE_LIBTRACEEVENT)";
481 #endif
482 }
483
perf_env__cpuid(struct perf_env * env)484 const char *perf_env__cpuid(struct perf_env *env)
485 {
486 int status;
487
488 if (!env->cpuid) { /* Assume local operation */
489 status = perf_env__read_cpuid(env);
490 if (status)
491 return NULL;
492 }
493
494 return env->cpuid;
495 }
496
perf_env__nr_pmu_mappings(struct perf_env * env)497 int perf_env__nr_pmu_mappings(struct perf_env *env)
498 {
499 int status;
500
501 if (!env->nr_pmu_mappings) { /* Assume local operation */
502 status = perf_env__read_pmu_mappings(env);
503 if (status)
504 return 0;
505 }
506
507 return env->nr_pmu_mappings;
508 }
509
perf_env__pmu_mappings(struct perf_env * env)510 const char *perf_env__pmu_mappings(struct perf_env *env)
511 {
512 int status;
513
514 if (!env->pmu_mappings) { /* Assume local operation */
515 status = perf_env__read_pmu_mappings(env);
516 if (status)
517 return NULL;
518 }
519
520 return env->pmu_mappings;
521 }
522
perf_env__numa_node(struct perf_env * env,struct perf_cpu cpu)523 int perf_env__numa_node(struct perf_env *env, struct perf_cpu cpu)
524 {
525 if (!env->nr_numa_map) {
526 struct numa_node *nn;
527 int i, nr = 0;
528
529 for (i = 0; i < env->nr_numa_nodes; i++) {
530 nn = &env->numa_nodes[i];
531 nr = max(nr, perf_cpu_map__max(nn->map).cpu);
532 }
533
534 nr++;
535
536 /*
537 * We initialize the numa_map array to prepare
538 * it for missing cpus, which return node -1
539 */
540 env->numa_map = malloc(nr * sizeof(int));
541 if (!env->numa_map)
542 return -1;
543
544 for (i = 0; i < nr; i++)
545 env->numa_map[i] = -1;
546
547 env->nr_numa_map = nr;
548
549 for (i = 0; i < env->nr_numa_nodes; i++) {
550 struct perf_cpu tmp;
551 int j;
552
553 nn = &env->numa_nodes[i];
554 perf_cpu_map__for_each_cpu(tmp, j, nn->map)
555 env->numa_map[tmp.cpu] = i;
556 }
557 }
558
559 return cpu.cpu >= 0 && cpu.cpu < env->nr_numa_map ? env->numa_map[cpu.cpu] : -1;
560 }
561
perf_env__has_pmu_mapping(struct perf_env * env,const char * pmu_name)562 bool perf_env__has_pmu_mapping(struct perf_env *env, const char *pmu_name)
563 {
564 char *pmu_mapping = env->pmu_mappings, *colon;
565
566 for (int i = 0; i < env->nr_pmu_mappings; ++i) {
567 if (strtoul(pmu_mapping, &colon, 0) == ULONG_MAX || *colon != ':')
568 goto out_error;
569
570 pmu_mapping = colon + 1;
571 if (strcmp(pmu_mapping, pmu_name) == 0)
572 return true;
573
574 pmu_mapping += strlen(pmu_mapping) + 1;
575 }
576 out_error:
577 return false;
578 }
579
perf_env__find_pmu_cap(struct perf_env * env,const char * pmu_name,const char * cap)580 char *perf_env__find_pmu_cap(struct perf_env *env, const char *pmu_name,
581 const char *cap)
582 {
583 char *cap_eq;
584 int cap_size;
585 char **ptr;
586 int i, j;
587
588 if (!pmu_name || !cap)
589 return NULL;
590
591 cap_size = strlen(cap);
592 cap_eq = zalloc(cap_size + 2);
593 if (!cap_eq)
594 return NULL;
595
596 memcpy(cap_eq, cap, cap_size);
597 cap_eq[cap_size] = '=';
598
599 if (!strcmp(pmu_name, "cpu")) {
600 for (i = 0; i < env->nr_cpu_pmu_caps; i++) {
601 if (!strncmp(env->cpu_pmu_caps[i], cap_eq, cap_size + 1)) {
602 free(cap_eq);
603 return &env->cpu_pmu_caps[i][cap_size + 1];
604 }
605 }
606 goto out;
607 }
608
609 for (i = 0; i < env->nr_pmus_with_caps; i++) {
610 if (strcmp(env->pmu_caps[i].pmu_name, pmu_name))
611 continue;
612
613 ptr = env->pmu_caps[i].caps;
614
615 for (j = 0; j < env->pmu_caps[i].nr_caps; j++) {
616 if (!strncmp(ptr[j], cap_eq, cap_size + 1)) {
617 free(cap_eq);
618 return &ptr[j][cap_size + 1];
619 }
620 }
621 }
622
623 out:
624 free(cap_eq);
625 return NULL;
626 }
627