1 files changed, 418 insertions, 0 deletions

diff --git a/tools/perf/util/env.c b/tools/perf/util/env.c
new file mode 100644
index 000000000..ed2a42abe
--- /dev/null
+++ b/tools/perf/util/env.c
@@ -0,0 +1,418 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "cpumap.h"
+#include "debug.h"
+#include "env.h"
+#include "util/header.h"
+#include <linux/ctype.h>
+#include <linux/zalloc.h>
+#include "bpf-event.h"
+#include "cgroup.h"
+#include <errno.h>
+#include <sys/utsname.h>
+#include <bpf/libbpf.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct perf_env perf_env;
+
+void perf_env__insert_bpf_prog_info(struct perf_env *env,
+				    struct bpf_prog_info_node *info_node)
+{
+	down_write(&env->bpf_progs.lock);
+	__perf_env__insert_bpf_prog_info(env, info_node);
+	up_write(&env->bpf_progs.lock);
+}
+
+void __perf_env__insert_bpf_prog_info(struct perf_env *env, struct bpf_prog_info_node *info_node)
+{
+	__u32 prog_id = info_node->info_linear->info.id;
+	struct bpf_prog_info_node *node;
+	struct rb_node *parent = NULL;
+	struct rb_node **p;
+
+	p = &env->bpf_progs.infos.rb_node;
+
+	while (*p != NULL) {
+		parent = *p;
+		node = rb_entry(parent, struct bpf_prog_info_node, rb_node);
+		if (prog_id < node->info_linear->info.id) {
+			p = &(*p)->rb_left;
+		} else if (prog_id > node->info_linear->info.id) {
+			p = &(*p)->rb_right;
+		} else {
+			pr_debug("duplicated bpf prog info %u\n", prog_id);
+			return;
+		}
+	}
+
+	rb_link_node(&info_node->rb_node, parent, p);
+	rb_insert_color(&info_node->rb_node, &env->bpf_progs.infos);
+	env->bpf_progs.infos_cnt++;
+}
+
+struct bpf_prog_info_node *perf_env__find_bpf_prog_info(struct perf_env *env,
+							__u32 prog_id)
+{
+	struct bpf_prog_info_node *node = NULL;
+	struct rb_node *n;
+
+	down_read(&env->bpf_progs.lock);
+	n = env->bpf_progs.infos.rb_node;
+
+	while (n) {
+		node = rb_entry(n, struct bpf_prog_info_node, rb_node);
+		if (prog_id < node->info_linear->info.id)
+			n = n->rb_left;
+		else if (prog_id > node->info_linear->info.id)
+			n = n->rb_right;
+		else
+			goto out;
+	}
+	node = NULL;
+
+out:
+	up_read(&env->bpf_progs.lock);
+	return node;
+}
+
+bool perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node)
+{
+	bool ret;
+
+	down_write(&env->bpf_progs.lock);
+	ret = __perf_env__insert_btf(env, btf_node);
+	up_write(&env->bpf_progs.lock);
+	return ret;
+}
+
+bool __perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node)
+{
+	struct rb_node *parent = NULL;
+	__u32 btf_id = btf_node->id;
+	struct btf_node *node;
+	struct rb_node **p;
+
+	p = &env->bpf_progs.btfs.rb_node;
+
+	while (*p != NULL) {
+		parent = *p;
+		node = rb_entry(parent, struct btf_node, rb_node);
+		if (btf_id < node->id) {
+			p = &(*p)->rb_left;
+		} else if (btf_id > node->id) {
+			p = &(*p)->rb_right;
+		} else {
+			pr_debug("duplicated btf %u\n", btf_id);
+			return false;
+		}
+	}
+
+	rb_link_node(&btf_node->rb_node, parent, p);
+	rb_insert_color(&btf_node->rb_node, &env->bpf_progs.btfs);
+	env->bpf_progs.btfs_cnt++;
+	return true;
+}
+
+struct btf_node *perf_env__find_btf(struct perf_env *env, __u32 btf_id)
+{
+	struct btf_node *res;
+
+	down_read(&env->bpf_progs.lock);
+	res = __perf_env__find_btf(env, btf_id);
+	up_read(&env->bpf_progs.lock);
+	return res;
+}
+
+struct btf_node *__perf_env__find_btf(struct perf_env *env, __u32 btf_id)
+{
+	struct btf_node *node = NULL;
+	struct rb_node *n;
+
+	n = env->bpf_progs.btfs.rb_node;
+
+	while (n) {
+		node = rb_entry(n, struct btf_node, rb_node);
+		if (btf_id < node->id)
+			n = n->rb_left;
+		else if (btf_id > node->id)
+			n = n->rb_right;
+		else
+			return node;
+	}
+	return NULL;
+}
+
+/* purge data in bpf_progs.infos tree */
+static void perf_env__purge_bpf(struct perf_env *env)
+{
+	struct rb_root *root;
+	struct rb_node *next;
+
+	down_write(&env->bpf_progs.lock);
+
+	root = &env->bpf_progs.infos;
+	next = rb_first(root);
+
+	while (next) {
+		struct bpf_prog_info_node *node;
+
+		node = rb_entry(next, struct bpf_prog_info_node, rb_node);
+		next = rb_next(&node->rb_node);
+		rb_erase(&node->rb_node, root);
+		free(node->info_linear);
+		free(node);
+	}
+
+	env->bpf_progs.infos_cnt = 0;
+
+	root = &env->bpf_progs.btfs;
+	next = rb_first(root);
+
+	while (next) {
+		struct btf_node *node;
+
+		node = rb_entry(next, struct btf_node, rb_node);
+		next = rb_next(&node->rb_node);
+		rb_erase(&node->rb_node, root);
+		free(node);
+	}
+
+	env->bpf_progs.btfs_cnt = 0;
+
+	up_write(&env->bpf_progs.lock);
+}
+
+void perf_env__exit(struct perf_env *env)
+{
+	int i;
+
+	perf_env__purge_bpf(env);
+	perf_env__purge_cgroups(env);
+	zfree(&env->hostname);
+	zfree(&env->os_release);
+	zfree(&env->version);
+	zfree(&env->arch);
+	zfree(&env->cpu_desc);
+	zfree(&env->cpuid);
+	zfree(&env->cmdline);
+	zfree(&env->cmdline_argv);
+	zfree(&env->sibling_dies);
+	zfree(&env->sibling_cores);
+	zfree(&env->sibling_threads);
+	zfree(&env->pmu_mappings);
+	zfree(&env->cpu);
+	zfree(&env->cpu_pmu_caps);
+	zfree(&env->numa_map);
+
+	for (i = 0; i < env->nr_numa_nodes; i++)
+		perf_cpu_map__put(env->numa_nodes[i].map);
+	zfree(&env->numa_nodes);
+
+	for (i = 0; i < env->caches_cnt; i++)
+		cpu_cache_level__free(&env->caches[i]);
+	zfree(&env->caches);
+
+	for (i = 0; i < env->nr_memory_nodes; i++)
+		zfree(&env->memory_nodes[i].set);
+	zfree(&env->memory_nodes);
+}
+
+void perf_env__init(struct perf_env *env)
+{
+	env->bpf_progs.infos = RB_ROOT;
+	env->bpf_progs.btfs = RB_ROOT;
+	init_rwsem(&env->bpf_progs.lock);
+}
+
+int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
+{
+	int i;
+
+	/* do not include NULL termination */
+	env->cmdline_argv = calloc(argc, sizeof(char *));
+	if (env->cmdline_argv == NULL)
+		goto out_enomem;
+
+	/*
+	 * Must copy argv contents because it gets moved around during option
+	 * parsing:
+	 */
+	for (i = 0; i < argc ; i++) {
+		env->cmdline_argv[i] = argv[i];
+		if (env->cmdline_argv[i] == NULL)
+			goto out_free;
+	}
+
+	env->nr_cmdline = argc;
+
+	return 0;
+out_free:
+	zfree(&env->cmdline_argv);
+out_enomem:
+	return -ENOMEM;
+}
+
+int perf_env__read_cpu_topology_map(struct perf_env *env)
+{
+	int cpu, nr_cpus;
+
+	if (env->cpu != NULL)
+		return 0;
+
+	if (env->nr_cpus_avail == 0)
+		env->nr_cpus_avail = cpu__max_present_cpu();
+
+	nr_cpus = env->nr_cpus_avail;
+	if (nr_cpus == -1)
+		return -EINVAL;
+
+	env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
+	if (env->cpu == NULL)
+		return -ENOMEM;
+
+	for (cpu = 0; cpu < nr_cpus; ++cpu) {
+		env->cpu[cpu].core_id	= cpu_map__get_core_id(cpu);
+		env->cpu[cpu].socket_id	= cpu_map__get_socket_id(cpu);
+		env->cpu[cpu].die_id	= cpu_map__get_die_id(cpu);
+	}
+
+	env->nr_cpus_avail = nr_cpus;
+	return 0;
+}
+
+int perf_env__read_cpuid(struct perf_env *env)
+{
+	char cpuid[128];
+	int err = get_cpuid(cpuid, sizeof(cpuid));
+
+	if (err)
+		return err;
+
+	free(env->cpuid);
+	env->cpuid = strdup(cpuid);
+	if (env->cpuid == NULL)
+		return ENOMEM;
+	return 0;
+}
+
+static int perf_env__read_arch(struct perf_env *env)
+{
+	struct utsname uts;
+
+	if (env->arch)
+		return 0;
+
+	if (!uname(&uts))
+		env->arch = strdup(uts.machine);
+
+	return env->arch ? 0 : -ENOMEM;
+}
+
+static int perf_env__read_nr_cpus_avail(struct perf_env *env)
+{
+	if (env->nr_cpus_avail == 0)
+		env->nr_cpus_avail = cpu__max_present_cpu();
+
+	return env->nr_cpus_avail ? 0 : -ENOENT;
+}
+
+const char *perf_env__raw_arch(struct perf_env *env)
+{
+	return env && !perf_env__read_arch(env) ? env->arch : "unknown";
+}
+
+int perf_env__nr_cpus_avail(struct perf_env *env)
+{
+	return env && !perf_env__read_nr_cpus_avail(env) ? env->nr_cpus_avail : 0;
+}
+
+void cpu_cache_level__free(struct cpu_cache_level *cache)
+{
+	zfree(&cache->type);
+	zfree(&cache->map);
+	zfree(&cache->size);
+}
+
+/*
+ * Return architecture name in a normalized form.
+ * The conversion logic comes from the Makefile.
+ */
+static const char *normalize_arch(char *arch)
+{
+	if (!strcmp(arch, "x86_64"))
+		return "x86";
+	if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
+		return "x86";
+	if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
+		return "sparc";
+	if (!strcmp(arch, "aarch64") || !strcmp(arch, "arm64"))
+		return "arm64";
+	if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
+		return "arm";
+	if (!strncmp(arch, "s390", 4))
+		return "s390";
+	if (!strncmp(arch, "parisc", 6))
+		return "parisc";
+	if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
+		return "powerpc";
+	if (!strncmp(arch, "mips", 4))
+		return "mips";
+	if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
+		return "sh";
+
+	return arch;
+}
+
+const char *perf_env__arch(struct perf_env *env)
+{
+	char *arch_name;
+
+	if (!env || !env->arch) { /* Assume local operation */
+		static struct utsname uts = { .machine[0] = '\0', };
+		if (uts.machine[0] == '\0' && uname(&uts) < 0)
+			return NULL;
+		arch_name = uts.machine;
+	} else
+		arch_name = env->arch;
+
+	return normalize_arch(arch_name);
+}
+
+
+int perf_env__numa_node(struct perf_env *env, int cpu)
+{
+	if (!env->nr_numa_map) {
+		struct numa_node *nn;
+		int i, nr = 0;
+
+		for (i = 0; i < env->nr_numa_nodes; i++) {
+			nn = &env->numa_nodes[i];
+			nr = max(nr, perf_cpu_map__max(nn->map));
+		}
+
+		nr++;
+
+		/*
+		 * We initialize the numa_map array to prepare
+		 * it for missing cpus, which return node -1
+		 */
+		env->numa_map = malloc(nr * sizeof(int));
+		if (!env->numa_map)
+			return -1;
+
+		for (i = 0; i < nr; i++)
+			env->numa_map[i] = -1;
+
+		env->nr_numa_map = nr;
+
+		for (i = 0; i < env->nr_numa_nodes; i++) {
+			int tmp, j;
+
+			nn = &env->numa_nodes[i];
+			perf_cpu_map__for_each_cpu(j, tmp, nn->map)
+				env->numa_map[j] = i;
+		}
+	}
+
+	return cpu >= 0 && cpu < env->nr_numa_map ? env->numa_map[cpu] : -1;
+}