platform/x86: asus-nb-wmi: Add quirk_asus_tablet_mode to other ROG Flow X13 models
[platform/kernel/linux-rpi.git] / samples / bpf / tracex6_user.c
1 // SPDX-License-Identifier: GPL-2.0
2 #define _GNU_SOURCE
3
4 #include <assert.h>
5 #include <fcntl.h>
6 #include <linux/perf_event.h>
7 #include <sched.h>
8 #include <stdio.h>
9 #include <stdlib.h>
10 #include <sys/ioctl.h>
11 #include <sys/time.h>
12 #include <sys/types.h>
13 #include <sys/wait.h>
14 #include <unistd.h>
15
16 #include <bpf/bpf.h>
17 #include <bpf/libbpf.h>
18 #include "perf-sys.h"
19
20 #define SAMPLE_PERIOD  0x7fffffffffffffffULL
21
22 /* counters, values, values2 */
23 static int map_fd[3];
24
25 static void check_on_cpu(int cpu, struct perf_event_attr *attr)
26 {
27         struct bpf_perf_event_value value2;
28         int pmu_fd, error = 0;
29         cpu_set_t set;
30         __u64 value;
31
32         /* Move to target CPU */
33         CPU_ZERO(&set);
34         CPU_SET(cpu, &set);
35         assert(sched_setaffinity(0, sizeof(set), &set) == 0);
36         /* Open perf event and attach to the perf_event_array */
37         pmu_fd = sys_perf_event_open(attr, -1/*pid*/, cpu/*cpu*/, -1/*group_fd*/, 0);
38         if (pmu_fd < 0) {
39                 fprintf(stderr, "sys_perf_event_open failed on CPU %d\n", cpu);
40                 error = 1;
41                 goto on_exit;
42         }
43         assert(bpf_map_update_elem(map_fd[0], &cpu, &pmu_fd, BPF_ANY) == 0);
44         assert(ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0) == 0);
45         /* Trigger the kprobe */
46         bpf_map_get_next_key(map_fd[1], &cpu, NULL);
47         /* Check the value */
48         if (bpf_map_lookup_elem(map_fd[1], &cpu, &value)) {
49                 fprintf(stderr, "Value missing for CPU %d\n", cpu);
50                 error = 1;
51                 goto on_exit;
52         } else {
53                 fprintf(stderr, "CPU %d: %llu\n", cpu, value);
54         }
55         /* The above bpf_map_lookup_elem should trigger the second kprobe */
56         if (bpf_map_lookup_elem(map_fd[2], &cpu, &value2)) {
57                 fprintf(stderr, "Value2 missing for CPU %d\n", cpu);
58                 error = 1;
59                 goto on_exit;
60         } else {
61                 fprintf(stderr, "CPU %d: counter: %llu, enabled: %llu, running: %llu\n", cpu,
62                         value2.counter, value2.enabled, value2.running);
63         }
64
65 on_exit:
66         assert(bpf_map_delete_elem(map_fd[0], &cpu) == 0 || error);
67         assert(ioctl(pmu_fd, PERF_EVENT_IOC_DISABLE, 0) == 0 || error);
68         assert(close(pmu_fd) == 0 || error);
69         assert(bpf_map_delete_elem(map_fd[1], &cpu) == 0 || error);
70         exit(error);
71 }
72
73 static void test_perf_event_array(struct perf_event_attr *attr,
74                                   const char *name)
75 {
76         int i, status, nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
77         pid_t pid[nr_cpus];
78         int err = 0;
79
80         printf("Test reading %s counters\n", name);
81
82         for (i = 0; i < nr_cpus; i++) {
83                 pid[i] = fork();
84                 assert(pid[i] >= 0);
85                 if (pid[i] == 0) {
86                         check_on_cpu(i, attr);
87                         exit(1);
88                 }
89         }
90
91         for (i = 0; i < nr_cpus; i++) {
92                 assert(waitpid(pid[i], &status, 0) == pid[i]);
93                 err |= status;
94         }
95
96         if (err)
97                 printf("Test: %s FAILED\n", name);
98 }
99
100 static void test_bpf_perf_event(void)
101 {
102         struct perf_event_attr attr_cycles = {
103                 .freq = 0,
104                 .sample_period = SAMPLE_PERIOD,
105                 .inherit = 0,
106                 .type = PERF_TYPE_HARDWARE,
107                 .read_format = 0,
108                 .sample_type = 0,
109                 .config = PERF_COUNT_HW_CPU_CYCLES,
110         };
111         struct perf_event_attr attr_clock = {
112                 .freq = 0,
113                 .sample_period = SAMPLE_PERIOD,
114                 .inherit = 0,
115                 .type = PERF_TYPE_SOFTWARE,
116                 .read_format = 0,
117                 .sample_type = 0,
118                 .config = PERF_COUNT_SW_CPU_CLOCK,
119         };
120         struct perf_event_attr attr_raw = {
121                 .freq = 0,
122                 .sample_period = SAMPLE_PERIOD,
123                 .inherit = 0,
124                 .type = PERF_TYPE_RAW,
125                 .read_format = 0,
126                 .sample_type = 0,
127                 /* Intel Instruction Retired */
128                 .config = 0xc0,
129         };
130         struct perf_event_attr attr_l1d_load = {
131                 .freq = 0,
132                 .sample_period = SAMPLE_PERIOD,
133                 .inherit = 0,
134                 .type = PERF_TYPE_HW_CACHE,
135                 .read_format = 0,
136                 .sample_type = 0,
137                 .config =
138                         PERF_COUNT_HW_CACHE_L1D |
139                         (PERF_COUNT_HW_CACHE_OP_READ << 8) |
140                         (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
141         };
142         struct perf_event_attr attr_llc_miss = {
143                 .freq = 0,
144                 .sample_period = SAMPLE_PERIOD,
145                 .inherit = 0,
146                 .type = PERF_TYPE_HW_CACHE,
147                 .read_format = 0,
148                 .sample_type = 0,
149                 .config =
150                         PERF_COUNT_HW_CACHE_LL |
151                         (PERF_COUNT_HW_CACHE_OP_READ << 8) |
152                         (PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
153         };
154         struct perf_event_attr attr_msr_tsc = {
155                 .freq = 0,
156                 .sample_period = 0,
157                 .inherit = 0,
158                 /* From /sys/bus/event_source/devices/msr/ */
159                 .type = 7,
160                 .read_format = 0,
161                 .sample_type = 0,
162                 .config = 0,
163         };
164
165         test_perf_event_array(&attr_cycles, "HARDWARE-cycles");
166         test_perf_event_array(&attr_clock, "SOFTWARE-clock");
167         test_perf_event_array(&attr_raw, "RAW-instruction-retired");
168         test_perf_event_array(&attr_l1d_load, "HW_CACHE-L1D-load");
169
170         /* below tests may fail in qemu */
171         test_perf_event_array(&attr_llc_miss, "HW_CACHE-LLC-miss");
172         test_perf_event_array(&attr_msr_tsc, "Dynamic-msr-tsc");
173 }
174
175 int main(int argc, char **argv)
176 {
177         struct bpf_link *links[2];
178         struct bpf_program *prog;
179         struct bpf_object *obj;
180         char filename[256];
181         int i = 0;
182
183         snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
184         obj = bpf_object__open_file(filename, NULL);
185         if (libbpf_get_error(obj)) {
186                 fprintf(stderr, "ERROR: opening BPF object file failed\n");
187                 return 0;
188         }
189
190         /* load BPF program */
191         if (bpf_object__load(obj)) {
192                 fprintf(stderr, "ERROR: loading BPF object file failed\n");
193                 goto cleanup;
194         }
195
196         map_fd[0] = bpf_object__find_map_fd_by_name(obj, "counters");
197         map_fd[1] = bpf_object__find_map_fd_by_name(obj, "values");
198         map_fd[2] = bpf_object__find_map_fd_by_name(obj, "values2");
199         if (map_fd[0] < 0 || map_fd[1] < 0 || map_fd[2] < 0) {
200                 fprintf(stderr, "ERROR: finding a map in obj file failed\n");
201                 goto cleanup;
202         }
203
204         bpf_object__for_each_program(prog, obj) {
205                 links[i] = bpf_program__attach(prog);
206                 if (libbpf_get_error(links[i])) {
207                         fprintf(stderr, "ERROR: bpf_program__attach failed\n");
208                         links[i] = NULL;
209                         goto cleanup;
210                 }
211                 i++;
212         }
213
214         test_bpf_perf_event();
215
216 cleanup:
217         for (i--; i >= 0; i--)
218                 bpf_link__destroy(links[i]);
219
220         bpf_object__close(obj);
221         return 0;
222 }