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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/ctype.h>
7#include <linux/zalloc.h>
8#include "cgroup.h"
9#include <errno.h>
10#include <sys/utsname.h>
11#include <stdlib.h>
12#include <string.h>
13
14struct perf_env perf_env;
15
16#ifdef HAVE_LIBBPF_SUPPORT
17#include "bpf-event.h"
18#include <bpf/libbpf.h>
19
20void perf_env__insert_bpf_prog_info(struct perf_env *env,
21 struct bpf_prog_info_node *info_node)
22{
23 __u32 prog_id = info_node->info_linear->info.id;
24 struct bpf_prog_info_node *node;
25 struct rb_node *parent = NULL;
26 struct rb_node **p;
27
28 down_write(&env->bpf_progs.lock);
29 p = &env->bpf_progs.infos.rb_node;
30
31 while (*p != NULL) {
32 parent = *p;
33 node = rb_entry(parent, struct bpf_prog_info_node, rb_node);
34 if (prog_id < node->info_linear->info.id) {
35 p = &(*p)->rb_left;
36 } else if (prog_id > node->info_linear->info.id) {
37 p = &(*p)->rb_right;
38 } else {
39 pr_debug("duplicated bpf prog info %u\n", prog_id);
40 goto out;
41 }
42 }
43
44 rb_link_node(&info_node->rb_node, parent, p);
45 rb_insert_color(&info_node->rb_node, &env->bpf_progs.infos);
46 env->bpf_progs.infos_cnt++;
47out:
48 up_write(&env->bpf_progs.lock);
49}
50
51struct bpf_prog_info_node *perf_env__find_bpf_prog_info(struct perf_env *env,
52 __u32 prog_id)
53{
54 struct bpf_prog_info_node *node = NULL;
55 struct rb_node *n;
56
57 down_read(&env->bpf_progs.lock);
58 n = env->bpf_progs.infos.rb_node;
59
60 while (n) {
61 node = rb_entry(n, struct bpf_prog_info_node, rb_node);
62 if (prog_id < node->info_linear->info.id)
63 n = n->rb_left;
64 else if (prog_id > node->info_linear->info.id)
65 n = n->rb_right;
66 else
67 goto out;
68 }
69 node = NULL;
70
71out:
72 up_read(&env->bpf_progs.lock);
73 return node;
74}
75
76void perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node)
77{
78 struct rb_node *parent = NULL;
79 __u32 btf_id = btf_node->id;
80 struct btf_node *node;
81 struct rb_node **p;
82
83 down_write(&env->bpf_progs.lock);
84 p = &env->bpf_progs.btfs.rb_node;
85
86 while (*p != NULL) {
87 parent = *p;
88 node = rb_entry(parent, struct btf_node, rb_node);
89 if (btf_id < node->id) {
90 p = &(*p)->rb_left;
91 } else if (btf_id > node->id) {
92 p = &(*p)->rb_right;
93 } else {
94 pr_debug("duplicated btf %u\n", btf_id);
95 goto out;
96 }
97 }
98
99 rb_link_node(&btf_node->rb_node, parent, p);
100 rb_insert_color(&btf_node->rb_node, &env->bpf_progs.btfs);
101 env->bpf_progs.btfs_cnt++;
102out:
103 up_write(&env->bpf_progs.lock);
104}
105
106struct btf_node *perf_env__find_btf(struct perf_env *env, __u32 btf_id)
107{
108 struct btf_node *node = NULL;
109 struct rb_node *n;
110
111 down_read(&env->bpf_progs.lock);
112 n = env->bpf_progs.btfs.rb_node;
113
114 while (n) {
115 node = rb_entry(n, struct btf_node, rb_node);
116 if (btf_id < node->id)
117 n = n->rb_left;
118 else if (btf_id > node->id)
119 n = n->rb_right;
120 else
121 goto out;
122 }
123 node = NULL;
124
125out:
126 up_read(&env->bpf_progs.lock);
127 return node;
128}
129
130/* purge data in bpf_progs.infos tree */
131static void perf_env__purge_bpf(struct perf_env *env)
132{
133 struct rb_root *root;
134 struct rb_node *next;
135
136 down_write(&env->bpf_progs.lock);
137
138 root = &env->bpf_progs.infos;
139 next = rb_first(root);
140
141 while (next) {
142 struct bpf_prog_info_node *node;
143
144 node = rb_entry(next, struct bpf_prog_info_node, rb_node);
145 next = rb_next(&node->rb_node);
146 rb_erase(&node->rb_node, root);
147 free(node->info_linear);
148 free(node);
149 }
150
151 env->bpf_progs.infos_cnt = 0;
152
153 root = &env->bpf_progs.btfs;
154 next = rb_first(root);
155
156 while (next) {
157 struct btf_node *node;
158
159 node = rb_entry(next, struct btf_node, rb_node);
160 next = rb_next(&node->rb_node);
161 rb_erase(&node->rb_node, root);
162 free(node);
163 }
164
165 env->bpf_progs.btfs_cnt = 0;
166
167 up_write(&env->bpf_progs.lock);
168}
169#else // HAVE_LIBBPF_SUPPORT
170static void perf_env__purge_bpf(struct perf_env *env __maybe_unused)
171{
172}
173#endif // HAVE_LIBBPF_SUPPORT
174
175void perf_env__exit(struct perf_env *env)
176{
177 int i;
178
179 perf_env__purge_bpf(env);
180 perf_env__purge_cgroups(env);
181 zfree(&env->hostname);
182 zfree(&env->os_release);
183 zfree(&env->version);
184 zfree(&env->arch);
185 zfree(&env->cpu_desc);
186 zfree(&env->cpuid);
187 zfree(&env->cmdline);
188 zfree(&env->cmdline_argv);
189 zfree(&env->sibling_dies);
190 zfree(&env->sibling_cores);
191 zfree(&env->sibling_threads);
192 zfree(&env->pmu_mappings);
193 zfree(&env->cpu);
194 zfree(&env->cpu_pmu_caps);
195 zfree(&env->numa_map);
196
197 for (i = 0; i < env->nr_numa_nodes; i++)
198 perf_cpu_map__put(env->numa_nodes[i].map);
199 zfree(&env->numa_nodes);
200
201 for (i = 0; i < env->caches_cnt; i++)
202 cpu_cache_level__free(&env->caches[i]);
203 zfree(&env->caches);
204
205 for (i = 0; i < env->nr_memory_nodes; i++)
206 zfree(&env->memory_nodes[i].set);
207 zfree(&env->memory_nodes);
208
209 for (i = 0; i < env->nr_hybrid_nodes; i++) {
210 zfree(&env->hybrid_nodes[i].pmu_name);
211 zfree(&env->hybrid_nodes[i].cpus);
212 }
213 zfree(&env->hybrid_nodes);
214
215 for (i = 0; i < env->nr_hybrid_cpc_nodes; i++) {
216 zfree(&env->hybrid_cpc_nodes[i].cpu_pmu_caps);
217 zfree(&env->hybrid_cpc_nodes[i].pmu_name);
218 }
219 zfree(&env->hybrid_cpc_nodes);
220}
221
222void perf_env__init(struct perf_env *env __maybe_unused)
223{
224#ifdef HAVE_LIBBPF_SUPPORT
225 env->bpf_progs.infos = RB_ROOT;
226 env->bpf_progs.btfs = RB_ROOT;
227 init_rwsem(&env->bpf_progs.lock);
228#endif
229}
230
231int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
232{
233 int i;
234
235 /* do not include NULL termination */
236 env->cmdline_argv = calloc(argc, sizeof(char *));
237 if (env->cmdline_argv == NULL)
238 goto out_enomem;
239
240 /*
241 * Must copy argv contents because it gets moved around during option
242 * parsing:
243 */
244 for (i = 0; i < argc ; i++) {
245 env->cmdline_argv[i] = argv[i];
246 if (env->cmdline_argv[i] == NULL)
247 goto out_free;
248 }
249
250 env->nr_cmdline = argc;
251
252 return 0;
253out_free:
254 zfree(&env->cmdline_argv);
255out_enomem:
256 return -ENOMEM;
257}
258
259int perf_env__read_cpu_topology_map(struct perf_env *env)
260{
261 int cpu, nr_cpus;
262
263 if (env->cpu != NULL)
264 return 0;
265
266 if (env->nr_cpus_avail == 0)
267 env->nr_cpus_avail = cpu__max_present_cpu();
268
269 nr_cpus = env->nr_cpus_avail;
270 if (nr_cpus == -1)
271 return -EINVAL;
272
273 env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
274 if (env->cpu == NULL)
275 return -ENOMEM;
276
277 for (cpu = 0; cpu < nr_cpus; ++cpu) {
278 env->cpu[cpu].core_id = cpu_map__get_core_id(cpu);
279 env->cpu[cpu].socket_id = cpu_map__get_socket_id(cpu);
280 env->cpu[cpu].die_id = cpu_map__get_die_id(cpu);
281 }
282
283 env->nr_cpus_avail = nr_cpus;
284 return 0;
285}
286
287int perf_env__read_cpuid(struct perf_env *env)
288{
289 char cpuid[128];
290 int err = get_cpuid(cpuid, sizeof(cpuid));
291
292 if (err)
293 return err;
294
295 free(env->cpuid);
296 env->cpuid = strdup(cpuid);
297 if (env->cpuid == NULL)
298 return ENOMEM;
299 return 0;
300}
301
302static int perf_env__read_arch(struct perf_env *env)
303{
304 struct utsname uts;
305
306 if (env->arch)
307 return 0;
308
309 if (!uname(&uts))
310 env->arch = strdup(uts.machine);
311
312 return env->arch ? 0 : -ENOMEM;
313}
314
315static int perf_env__read_nr_cpus_avail(struct perf_env *env)
316{
317 if (env->nr_cpus_avail == 0)
318 env->nr_cpus_avail = cpu__max_present_cpu();
319
320 return env->nr_cpus_avail ? 0 : -ENOENT;
321}
322
323const char *perf_env__raw_arch(struct perf_env *env)
324{
325 return env && !perf_env__read_arch(env) ? env->arch : "unknown";
326}
327
328int perf_env__nr_cpus_avail(struct perf_env *env)
329{
330 return env && !perf_env__read_nr_cpus_avail(env) ? env->nr_cpus_avail : 0;
331}
332
333void cpu_cache_level__free(struct cpu_cache_level *cache)
334{
335 zfree(&cache->type);
336 zfree(&cache->map);
337 zfree(&cache->size);
338}
339
340/*
341 * Return architecture name in a normalized form.
342 * The conversion logic comes from the Makefile.
343 */
344static const char *normalize_arch(char *arch)
345{
346 if (!strcmp(arch, "x86_64"))
347 return "x86";
348 if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
349 return "x86";
350 if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
351 return "sparc";
352 if (!strcmp(arch, "aarch64") || !strcmp(arch, "arm64"))
353 return "arm64";
354 if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
355 return "arm";
356 if (!strncmp(arch, "s390", 4))
357 return "s390";
358 if (!strncmp(arch, "parisc", 6))
359 return "parisc";
360 if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
361 return "powerpc";
362 if (!strncmp(arch, "mips", 4))
363 return "mips";
364 if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
365 return "sh";
366
367 return arch;
368}
369
370const char *perf_env__arch(struct perf_env *env)
371{
372 char *arch_name;
373
374 if (!env || !env->arch) { /* Assume local operation */
375 static struct utsname uts = { .machine[0] = '\0', };
376 if (uts.machine[0] == '\0' && uname(&uts) < 0)
377 return NULL;
378 arch_name = uts.machine;
379 } else
380 arch_name = env->arch;
381
382 return normalize_arch(arch_name);
383}
384
385
386int perf_env__numa_node(struct perf_env *env, int cpu)
387{
388 if (!env->nr_numa_map) {
389 struct numa_node *nn;
390 int i, nr = 0;
391
392 for (i = 0; i < env->nr_numa_nodes; i++) {
393 nn = &env->numa_nodes[i];
394 nr = max(nr, perf_cpu_map__max(nn->map));
395 }
396
397 nr++;
398
399 /*
400 * We initialize the numa_map array to prepare
401 * it for missing cpus, which return node -1
402 */
403 env->numa_map = malloc(nr * sizeof(int));
404 if (!env->numa_map)
405 return -1;
406
407 for (i = 0; i < nr; i++)
408 env->numa_map[i] = -1;
409
410 env->nr_numa_map = nr;
411
412 for (i = 0; i < env->nr_numa_nodes; i++) {
413 int tmp, j;
414
415 nn = &env->numa_nodes[i];
416 perf_cpu_map__for_each_cpu(j, tmp, nn->map)
417 env->numa_map[j] = i;
418 }
419 }
420
421 return cpu >= 0 && cpu < env->nr_numa_map ? env->numa_map[cpu] : -1;
422}