1 // SPDX-License-Identifier: GPL-2.0
4 #include <linux/ctype.h>
5 #include <linux/zalloc.h>
8 #include <sys/utsname.h>
9 #include <bpf/libbpf.h>
12 struct perf_env perf_env;
14 void perf_env__insert_bpf_prog_info(struct perf_env *env,
15 struct bpf_prog_info_node *info_node)
17 __u32 prog_id = info_node->info_linear->info.id;
18 struct bpf_prog_info_node *node;
19 struct rb_node *parent = NULL;
22 down_write(&env->bpf_progs.lock);
23 p = &env->bpf_progs.infos.rb_node;
27 node = rb_entry(parent, struct bpf_prog_info_node, rb_node);
28 if (prog_id < node->info_linear->info.id) {
30 } else if (prog_id > node->info_linear->info.id) {
33 pr_debug("duplicated bpf prog info %u\n", prog_id);
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++;
42 up_write(&env->bpf_progs.lock);
45 struct bpf_prog_info_node *perf_env__find_bpf_prog_info(struct perf_env *env,
48 struct bpf_prog_info_node *node = NULL;
51 down_read(&env->bpf_progs.lock);
52 n = env->bpf_progs.infos.rb_node;
55 node = rb_entry(n, struct bpf_prog_info_node, rb_node);
56 if (prog_id < node->info_linear->info.id)
58 else if (prog_id > node->info_linear->info.id)
66 up_read(&env->bpf_progs.lock);
70 void perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node)
72 struct rb_node *parent = NULL;
73 __u32 btf_id = btf_node->id;
74 struct btf_node *node;
77 down_write(&env->bpf_progs.lock);
78 p = &env->bpf_progs.btfs.rb_node;
82 node = rb_entry(parent, struct btf_node, rb_node);
83 if (btf_id < node->id) {
85 } else if (btf_id > node->id) {
88 pr_debug("duplicated btf %u\n", btf_id);
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++;
97 up_write(&env->bpf_progs.lock);
100 struct btf_node *perf_env__find_btf(struct perf_env *env, __u32 btf_id)
102 struct btf_node *node = NULL;
105 down_read(&env->bpf_progs.lock);
106 n = env->bpf_progs.btfs.rb_node;
109 node = rb_entry(n, struct btf_node, rb_node);
110 if (btf_id < node->id)
112 else if (btf_id > node->id)
120 up_read(&env->bpf_progs.lock);
124 /* purge data in bpf_progs.infos tree */
125 static void perf_env__purge_bpf(struct perf_env *env)
127 struct rb_root *root;
128 struct rb_node *next;
130 down_write(&env->bpf_progs.lock);
132 root = &env->bpf_progs.infos;
133 next = rb_first(root);
136 struct bpf_prog_info_node *node;
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);
144 env->bpf_progs.infos_cnt = 0;
146 root = &env->bpf_progs.btfs;
147 next = rb_first(root);
150 struct btf_node *node;
152 node = rb_entry(next, struct btf_node, rb_node);
153 next = rb_next(&node->rb_node);
154 rb_erase(&node->rb_node, root);
158 env->bpf_progs.btfs_cnt = 0;
160 up_write(&env->bpf_progs.lock);
163 void perf_env__exit(struct perf_env *env)
167 perf_env__purge_bpf(env);
168 zfree(&env->hostname);
169 zfree(&env->os_release);
170 zfree(&env->version);
172 zfree(&env->cpu_desc);
174 zfree(&env->cmdline);
175 zfree(&env->cmdline_argv);
176 zfree(&env->sibling_cores);
177 zfree(&env->sibling_threads);
178 zfree(&env->pmu_mappings);
181 for (i = 0; i < env->nr_numa_nodes; i++)
182 cpu_map__put(env->numa_nodes[i].map);
183 zfree(&env->numa_nodes);
185 for (i = 0; i < env->caches_cnt; i++)
186 cpu_cache_level__free(&env->caches[i]);
189 for (i = 0; i < env->nr_memory_nodes; i++)
190 zfree(&env->memory_nodes[i].set);
191 zfree(&env->memory_nodes);
194 void perf_env__init(struct perf_env *env)
196 env->bpf_progs.infos = RB_ROOT;
197 env->bpf_progs.btfs = RB_ROOT;
198 init_rwsem(&env->bpf_progs.lock);
201 int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
205 /* do not include NULL termination */
206 env->cmdline_argv = calloc(argc, sizeof(char *));
207 if (env->cmdline_argv == NULL)
211 * Must copy argv contents because it gets moved around during option
214 for (i = 0; i < argc ; i++) {
215 env->cmdline_argv[i] = argv[i];
216 if (env->cmdline_argv[i] == NULL)
220 env->nr_cmdline = argc;
224 zfree(&env->cmdline_argv);
229 int perf_env__read_cpu_topology_map(struct perf_env *env)
233 if (env->cpu != NULL)
236 if (env->nr_cpus_avail == 0)
237 env->nr_cpus_avail = cpu__max_present_cpu();
239 nr_cpus = env->nr_cpus_avail;
243 env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
244 if (env->cpu == NULL)
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);
253 env->nr_cpus_avail = nr_cpus;
257 static int perf_env__read_arch(struct perf_env *env)
265 env->arch = strdup(uts.machine);
267 return env->arch ? 0 : -ENOMEM;
270 static int perf_env__read_nr_cpus_avail(struct perf_env *env)
272 if (env->nr_cpus_avail == 0)
273 env->nr_cpus_avail = cpu__max_present_cpu();
275 return env->nr_cpus_avail ? 0 : -ENOENT;
278 const char *perf_env__raw_arch(struct perf_env *env)
280 return env && !perf_env__read_arch(env) ? env->arch : "unknown";
283 int perf_env__nr_cpus_avail(struct perf_env *env)
285 return env && !perf_env__read_nr_cpus_avail(env) ? env->nr_cpus_avail : 0;
288 void cpu_cache_level__free(struct cpu_cache_level *cache)
296 * Return architecture name in a normalized form.
297 * The conversion logic comes from the Makefile.
299 static const char *normalize_arch(char *arch)
301 if (!strcmp(arch, "x86_64"))
303 if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
305 if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
307 if (!strcmp(arch, "aarch64") || !strcmp(arch, "arm64"))
309 if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
311 if (!strncmp(arch, "s390", 4))
313 if (!strncmp(arch, "parisc", 6))
315 if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
317 if (!strncmp(arch, "mips", 4))
319 if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
325 const char *perf_env__arch(struct perf_env *env)
330 if (!env || !env->arch) { /* Assume local operation */
333 arch_name = uts.machine;
335 arch_name = env->arch;
337 return normalize_arch(arch_name);