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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 "bpf-event.h"
9#include "cgroup.h"
10#include <errno.h>
11#include <sys/utsname.h>
12#include <bpf/libbpf.h>
13#include <stdlib.h>
14#include <string.h>
15
16struct perf_env perf_env;
17
18void perf_env__insert_bpf_prog_info(struct perf_env *env,
19 struct bpf_prog_info_node *info_node)
20{
21 __u32 prog_id = info_node->info_linear->info.id;
22 struct bpf_prog_info_node *node;
23 struct rb_node *parent = NULL;
24 struct rb_node **p;
25
26 down_write(&env->bpf_progs.lock);
27 p = &env->bpf_progs.infos.rb_node;
28
29 while (*p != NULL) {
30 parent = *p;
31 node = rb_entry(parent, struct bpf_prog_info_node, rb_node);
32 if (prog_id < node->info_linear->info.id) {
33 p = &(*p)->rb_left;
34 } else if (prog_id > node->info_linear->info.id) {
35 p = &(*p)->rb_right;
36 } else {
37 pr_debug("duplicated bpf prog info %u\n", prog_id);
38 goto out;
39 }
40 }
41
42 rb_link_node(&info_node->rb_node, parent, p);
43 rb_insert_color(&info_node->rb_node, &env->bpf_progs.infos);
44 env->bpf_progs.infos_cnt++;
45out:
46 up_write(&env->bpf_progs.lock);
47}
48
49struct bpf_prog_info_node *perf_env__find_bpf_prog_info(struct perf_env *env,
50 __u32 prog_id)
51{
52 struct bpf_prog_info_node *node = NULL;
53 struct rb_node *n;
54
55 down_read(&env->bpf_progs.lock);
56 n = env->bpf_progs.infos.rb_node;
57
58 while (n) {
59 node = rb_entry(n, struct bpf_prog_info_node, rb_node);
60 if (prog_id < node->info_linear->info.id)
61 n = n->rb_left;
62 else if (prog_id > node->info_linear->info.id)
63 n = n->rb_right;
64 else
65 goto out;
66 }
67 node = NULL;
68
69out:
70 up_read(&env->bpf_progs.lock);
71 return node;
72}
73
74void perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node)
75{
76 struct rb_node *parent = NULL;
77 __u32 btf_id = btf_node->id;
78 struct btf_node *node;
79 struct rb_node **p;
80
81 down_write(&env->bpf_progs.lock);
82 p = &env->bpf_progs.btfs.rb_node;
83
84 while (*p != NULL) {
85 parent = *p;
86 node = rb_entry(parent, struct btf_node, rb_node);
87 if (btf_id < node->id) {
88 p = &(*p)->rb_left;
89 } else if (btf_id > node->id) {
90 p = &(*p)->rb_right;
91 } else {
92 pr_debug("duplicated btf %u\n", btf_id);
93 goto out;
94 }
95 }
96
97 rb_link_node(&btf_node->rb_node, parent, p);
98 rb_insert_color(&btf_node->rb_node, &env->bpf_progs.btfs);
99 env->bpf_progs.btfs_cnt++;
100out:
101 up_write(&env->bpf_progs.lock);
102}
103
104struct btf_node *perf_env__find_btf(struct perf_env *env, __u32 btf_id)
105{
106 struct btf_node *node = NULL;
107 struct rb_node *n;
108
109 down_read(&env->bpf_progs.lock);
110 n = env->bpf_progs.btfs.rb_node;
111
112 while (n) {
113 node = rb_entry(n, struct btf_node, rb_node);
114 if (btf_id < node->id)
115 n = n->rb_left;
116 else if (btf_id > node->id)
117 n = n->rb_right;
118 else
119 goto out;
120 }
121 node = NULL;
122
123out:
124 up_read(&env->bpf_progs.lock);
125 return node;
126}
127
128/* purge data in bpf_progs.infos tree */
129static void perf_env__purge_bpf(struct perf_env *env)
130{
131 struct rb_root *root;
132 struct rb_node *next;
133
134 down_write(&env->bpf_progs.lock);
135
136 root = &env->bpf_progs.infos;
137 next = rb_first(root);
138
139 while (next) {
140 struct bpf_prog_info_node *node;
141
142 node = rb_entry(next, struct bpf_prog_info_node, rb_node);
143 next = rb_next(&node->rb_node);
144 rb_erase(&node->rb_node, root);
145 free(node);
146 }
147
148 env->bpf_progs.infos_cnt = 0;
149
150 root = &env->bpf_progs.btfs;
151 next = rb_first(root);
152
153 while (next) {
154 struct btf_node *node;
155
156 node = rb_entry(next, struct btf_node, rb_node);
157 next = rb_next(&node->rb_node);
158 rb_erase(&node->rb_node, root);
159 free(node);
160 }
161
162 env->bpf_progs.btfs_cnt = 0;
163
164 up_write(&env->bpf_progs.lock);
165}
166
167void perf_env__exit(struct perf_env *env)
168{
169 int i;
170
171 perf_env__purge_bpf(env);
172 perf_env__purge_cgroups(env);
173 zfree(&env->hostname);
174 zfree(&env->os_release);
175 zfree(&env->version);
176 zfree(&env->arch);
177 zfree(&env->cpu_desc);
178 zfree(&env->cpuid);
179 zfree(&env->cmdline);
180 zfree(&env->cmdline_argv);
181 zfree(&env->sibling_cores);
182 zfree(&env->sibling_threads);
183 zfree(&env->pmu_mappings);
184 zfree(&env->cpu);
185 zfree(&env->numa_map);
186
187 for (i = 0; i < env->nr_numa_nodes; i++)
188 perf_cpu_map__put(env->numa_nodes[i].map);
189 zfree(&env->numa_nodes);
190
191 for (i = 0; i < env->caches_cnt; i++)
192 cpu_cache_level__free(&env->caches[i]);
193 zfree(&env->caches);
194
195 for (i = 0; i < env->nr_memory_nodes; i++)
196 zfree(&env->memory_nodes[i].set);
197 zfree(&env->memory_nodes);
198}
199
200void perf_env__init(struct perf_env *env)
201{
202 env->bpf_progs.infos = RB_ROOT;
203 env->bpf_progs.btfs = RB_ROOT;
204 init_rwsem(&env->bpf_progs.lock);
205}
206
207int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
208{
209 int i;
210
211 /* do not include NULL termination */
212 env->cmdline_argv = calloc(argc, sizeof(char *));
213 if (env->cmdline_argv == NULL)
214 goto out_enomem;
215
216 /*
217 * Must copy argv contents because it gets moved around during option
218 * parsing:
219 */
220 for (i = 0; i < argc ; i++) {
221 env->cmdline_argv[i] = argv[i];
222 if (env->cmdline_argv[i] == NULL)
223 goto out_free;
224 }
225
226 env->nr_cmdline = argc;
227
228 return 0;
229out_free:
230 zfree(&env->cmdline_argv);
231out_enomem:
232 return -ENOMEM;
233}
234
235int perf_env__read_cpu_topology_map(struct perf_env *env)
236{
237 int cpu, nr_cpus;
238
239 if (env->cpu != NULL)
240 return 0;
241
242 if (env->nr_cpus_avail == 0)
243 env->nr_cpus_avail = cpu__max_present_cpu();
244
245 nr_cpus = env->nr_cpus_avail;
246 if (nr_cpus == -1)
247 return -EINVAL;
248
249 env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
250 if (env->cpu == NULL)
251 return -ENOMEM;
252
253 for (cpu = 0; cpu < nr_cpus; ++cpu) {
254 env->cpu[cpu].core_id = cpu_map__get_core_id(cpu);
255 env->cpu[cpu].socket_id = cpu_map__get_socket_id(cpu);
256 env->cpu[cpu].die_id = cpu_map__get_die_id(cpu);
257 }
258
259 env->nr_cpus_avail = nr_cpus;
260 return 0;
261}
262
263int perf_env__read_cpuid(struct perf_env *env)
264{
265 char cpuid[128];
266 int err = get_cpuid(cpuid, sizeof(cpuid));
267
268 if (err)
269 return err;
270
271 free(env->cpuid);
272 env->cpuid = strdup(cpuid);
273 if (env->cpuid == NULL)
274 return ENOMEM;
275 return 0;
276}
277
278static int perf_env__read_arch(struct perf_env *env)
279{
280 struct utsname uts;
281
282 if (env->arch)
283 return 0;
284
285 if (!uname(&uts))
286 env->arch = strdup(uts.machine);
287
288 return env->arch ? 0 : -ENOMEM;
289}
290
291static int perf_env__read_nr_cpus_avail(struct perf_env *env)
292{
293 if (env->nr_cpus_avail == 0)
294 env->nr_cpus_avail = cpu__max_present_cpu();
295
296 return env->nr_cpus_avail ? 0 : -ENOENT;
297}
298
299const char *perf_env__raw_arch(struct perf_env *env)
300{
301 return env && !perf_env__read_arch(env) ? env->arch : "unknown";
302}
303
304int perf_env__nr_cpus_avail(struct perf_env *env)
305{
306 return env && !perf_env__read_nr_cpus_avail(env) ? env->nr_cpus_avail : 0;
307}
308
309void cpu_cache_level__free(struct cpu_cache_level *cache)
310{
311 zfree(&cache->type);
312 zfree(&cache->map);
313 zfree(&cache->size);
314}
315
316/*
317 * Return architecture name in a normalized form.
318 * The conversion logic comes from the Makefile.
319 */
320static const char *normalize_arch(char *arch)
321{
322 if (!strcmp(arch, "x86_64"))
323 return "x86";
324 if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
325 return "x86";
326 if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
327 return "sparc";
328 if (!strcmp(arch, "aarch64") || !strcmp(arch, "arm64"))
329 return "arm64";
330 if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
331 return "arm";
332 if (!strncmp(arch, "s390", 4))
333 return "s390";
334 if (!strncmp(arch, "parisc", 6))
335 return "parisc";
336 if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
337 return "powerpc";
338 if (!strncmp(arch, "mips", 4))
339 return "mips";
340 if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
341 return "sh";
342
343 return arch;
344}
345
346const char *perf_env__arch(struct perf_env *env)
347{
348 char *arch_name;
349
350 if (!env || !env->arch) { /* Assume local operation */
351 static struct utsname uts = { .machine[0] = '\0', };
352 if (uts.machine[0] == '\0' && uname(&uts) < 0)
353 return NULL;
354 arch_name = uts.machine;
355 } else
356 arch_name = env->arch;
357
358 return normalize_arch(arch_name);
359}
360
361
362int perf_env__numa_node(struct perf_env *env, int cpu)
363{
364 if (!env->nr_numa_map) {
365 struct numa_node *nn;
366 int i, nr = 0;
367
368 for (i = 0; i < env->nr_numa_nodes; i++) {
369 nn = &env->numa_nodes[i];
370 nr = max(nr, perf_cpu_map__max(nn->map));
371 }
372
373 nr++;
374
375 /*
376 * We initialize the numa_map array to prepare
377 * it for missing cpus, which return node -1
378 */
379 env->numa_map = malloc(nr * sizeof(int));
380 if (!env->numa_map)
381 return -1;
382
383 for (i = 0; i < nr; i++)
384 env->numa_map[i] = -1;
385
386 env->nr_numa_map = nr;
387
388 for (i = 0; i < env->nr_numa_nodes; i++) {
389 int tmp, j;
390
391 nn = &env->numa_nodes[i];
392 perf_cpu_map__for_each_cpu(j, tmp, nn->map)
393 env->numa_map[j] = i;
394 }
395 }
396
397 return cpu >= 0 && cpu < env->nr_numa_map ? env->numa_map[cpu] : -1;
398}
1// SPDX-License-Identifier: GPL-2.0
2#include "cpumap.h"
3#include "env.h"
4#include "sane_ctype.h"
5#include "util.h"
6#include <errno.h>
7#include <sys/utsname.h>
8
9struct perf_env perf_env;
10
11void perf_env__exit(struct perf_env *env)
12{
13 int i;
14
15 zfree(&env->hostname);
16 zfree(&env->os_release);
17 zfree(&env->version);
18 zfree(&env->arch);
19 zfree(&env->cpu_desc);
20 zfree(&env->cpuid);
21 zfree(&env->cmdline);
22 zfree(&env->cmdline_argv);
23 zfree(&env->sibling_cores);
24 zfree(&env->sibling_threads);
25 zfree(&env->pmu_mappings);
26 zfree(&env->cpu);
27
28 for (i = 0; i < env->nr_numa_nodes; i++)
29 cpu_map__put(env->numa_nodes[i].map);
30 zfree(&env->numa_nodes);
31
32 for (i = 0; i < env->caches_cnt; i++)
33 cpu_cache_level__free(&env->caches[i]);
34 zfree(&env->caches);
35
36 for (i = 0; i < env->nr_memory_nodes; i++)
37 free(env->memory_nodes[i].set);
38 zfree(&env->memory_nodes);
39}
40
41int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
42{
43 int i;
44
45 /* do not include NULL termination */
46 env->cmdline_argv = calloc(argc, sizeof(char *));
47 if (env->cmdline_argv == NULL)
48 goto out_enomem;
49
50 /*
51 * Must copy argv contents because it gets moved around during option
52 * parsing:
53 */
54 for (i = 0; i < argc ; i++) {
55 env->cmdline_argv[i] = argv[i];
56 if (env->cmdline_argv[i] == NULL)
57 goto out_free;
58 }
59
60 env->nr_cmdline = argc;
61
62 return 0;
63out_free:
64 zfree(&env->cmdline_argv);
65out_enomem:
66 return -ENOMEM;
67}
68
69int perf_env__read_cpu_topology_map(struct perf_env *env)
70{
71 int cpu, nr_cpus;
72
73 if (env->cpu != NULL)
74 return 0;
75
76 if (env->nr_cpus_avail == 0)
77 env->nr_cpus_avail = cpu__max_present_cpu();
78
79 nr_cpus = env->nr_cpus_avail;
80 if (nr_cpus == -1)
81 return -EINVAL;
82
83 env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
84 if (env->cpu == NULL)
85 return -ENOMEM;
86
87 for (cpu = 0; cpu < nr_cpus; ++cpu) {
88 env->cpu[cpu].core_id = cpu_map__get_core_id(cpu);
89 env->cpu[cpu].socket_id = cpu_map__get_socket_id(cpu);
90 }
91
92 env->nr_cpus_avail = nr_cpus;
93 return 0;
94}
95
96void cpu_cache_level__free(struct cpu_cache_level *cache)
97{
98 free(cache->type);
99 free(cache->map);
100 free(cache->size);
101}
102
103/*
104 * Return architecture name in a normalized form.
105 * The conversion logic comes from the Makefile.
106 */
107static const char *normalize_arch(char *arch)
108{
109 if (!strcmp(arch, "x86_64"))
110 return "x86";
111 if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
112 return "x86";
113 if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
114 return "sparc";
115 if (!strcmp(arch, "aarch64") || !strcmp(arch, "arm64"))
116 return "arm64";
117 if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
118 return "arm";
119 if (!strncmp(arch, "s390", 4))
120 return "s390";
121 if (!strncmp(arch, "parisc", 6))
122 return "parisc";
123 if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
124 return "powerpc";
125 if (!strncmp(arch, "mips", 4))
126 return "mips";
127 if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
128 return "sh";
129
130 return arch;
131}
132
133const char *perf_env__arch(struct perf_env *env)
134{
135 struct utsname uts;
136 char *arch_name;
137
138 if (!env) { /* Assume local operation */
139 if (uname(&uts) < 0)
140 return NULL;
141 arch_name = uts.machine;
142 } else
143 arch_name = env->arch;
144
145 return normalize_arch(arch_name);
146}