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