1 /* SPDX-License-Identifier: GPL-2.0 */
3 #include "perf-sys.h"
7 #include "util/parse-events.h"
14 static int perf_do_probe_api(setup_probe_fn_t fn, struct perf_cpu cpu, const char *str)  in perf_do_probe_api()  argument
19 	int err = -EAGAIN, fd;  in perf_do_probe_api()
20 	static pid_t pid = -1;  in perf_do_probe_api()
24 		return -ENOMEM;  in perf_do_probe_api()
32 		fd = sys_perf_event_open(&evsel->core.attr, pid, cpu.cpu, -1, flags);  in perf_do_probe_api()
34 			if (pid == -1 && errno == EACCES) {  in perf_do_probe_api()
46 	fd = sys_perf_event_open(&evsel->core.attr, pid, cpu.cpu, -1, flags);  in perf_do_probe_api()
49 			err = -EINVAL;  in perf_do_probe_api()
62 	const char *try[] = {"cycles:u", "instructions:u", "cpu-clock:u", NULL};  in perf_probe_api()
64 	struct perf_cpu cpu;  in perf_probe_api()  local
70 	cpu = perf_cpu_map__cpu(cpus, 0);  in perf_probe_api()
74 		ret = perf_do_probe_api(fn, cpu, try[i++]);  in perf_probe_api()
77 	} while (ret == -EAGAIN && try[i]);  in perf_probe_api()
84 	evsel->core.attr.sample_type |= PERF_SAMPLE_IDENTIFIER;  in perf_probe_sample_identifier()
89 	evsel->core.attr.comm_exec = 1;  in perf_probe_comm_exec()
94 	evsel->core.attr.context_switch = 1;  in perf_probe_context_switch()
99 	evsel->core.attr.text_poke = 1;  in perf_probe_text_poke()
104 	evsel->core.attr.build_id = 1;  in perf_probe_build_id()
109 	evsel->core.attr.cgroup = 1;  in perf_probe_cgroup()
140 	struct perf_cpu cpu;  in perf_can_record_cpu_wide()  local
147 	cpu = perf_cpu_map__cpu(cpus, 0);  in perf_can_record_cpu_wide()
150 	fd = sys_perf_event_open(&attr, -1, cpu.cpu, -1, 0);  in perf_can_record_cpu_wide()
168 		 * Non-zero value causes the kernel to calculate the effective  in perf_can_aux_sample()
175 	fd = sys_perf_event_open(&attr, -1, 0, -1, 0);  in perf_can_aux_sample()