Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * The struct perf_event_attr test support.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * This test is embedded inside into perf directly and is governed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * by the PERF_TEST_ATTR environment variable and hook inside
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * sys_perf_event_open function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * The general idea is to store 'struct perf_event_attr' details for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * each event created within single perf command. Each event details
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * are stored into separate text file. Once perf command is finished
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * these files can be checked for values we expect for command.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * Besides 'struct perf_event_attr' values we also store 'fd' and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * 'group_fd' values to allow checking for groups created.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  * This all is triggered by setting PERF_TEST_ATTR environment variable.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  * It must contain name of existing directory with access and write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  * permissions. All the event text files are stored there.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <debug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <inttypes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include <sys/param.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include <sys/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #include <sys/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #include <subcmd/exec-cmd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #include "event.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #include "util.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #include "tests.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define ENV "PERF_TEST_ATTR"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) static char *dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) static bool ready;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) void test_attr__init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	dir = getenv(ENV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	test_attr__enabled = (dir != NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) #define BUFSIZE 1024
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) #define __WRITE_ASS(str, fmt, data)					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) do {									\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	char buf[BUFSIZE];						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	size_t size;							\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 									\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	size = snprintf(buf, BUFSIZE, #str "=%"fmt "\n", data);		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	if (1 != fwrite(buf, size, 1, file)) {				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		perror("test attr - failed to write event file");	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		fclose(file);						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		return -1;						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	}								\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 									\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) #define WRITE_ASS(field, fmt) __WRITE_ASS(field, fmt, attr->field)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) static int store_event(struct perf_event_attr *attr, pid_t pid, int cpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		       int fd, int group_fd, unsigned long flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	FILE *file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	char path[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	if (!ready)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	snprintf(path, PATH_MAX, "%s/event-%d-%llu-%d", dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		 attr->type, attr->config, fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	file = fopen(path, "w+");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	if (!file) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		perror("test attr - failed to open event file");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	if (fprintf(file, "[event-%d-%llu-%d]\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		    attr->type, attr->config, fd) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		perror("test attr - failed to write event file");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		fclose(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	/* syscall arguments */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	__WRITE_ASS(fd,       "d", fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	__WRITE_ASS(group_fd, "d", group_fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	__WRITE_ASS(cpu,      "d", cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	__WRITE_ASS(pid,      "d", pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	__WRITE_ASS(flags,   "lu", flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	/* struct perf_event_attr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	WRITE_ASS(type,   PRIu32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	WRITE_ASS(size,   PRIu32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	WRITE_ASS(config,  "llu");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	WRITE_ASS(sample_period, "llu");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	WRITE_ASS(sample_type,   "llu");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	WRITE_ASS(read_format,   "llu");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	WRITE_ASS(disabled,       "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	WRITE_ASS(inherit,        "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	WRITE_ASS(pinned,         "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	WRITE_ASS(exclusive,      "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	WRITE_ASS(exclude_user,   "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	WRITE_ASS(exclude_kernel, "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	WRITE_ASS(exclude_hv,     "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	WRITE_ASS(exclude_idle,   "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	WRITE_ASS(mmap,           "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	WRITE_ASS(comm,           "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	WRITE_ASS(freq,           "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	WRITE_ASS(inherit_stat,   "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	WRITE_ASS(enable_on_exec, "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	WRITE_ASS(task,           "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	WRITE_ASS(watermark,      "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	WRITE_ASS(precise_ip,     "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	WRITE_ASS(mmap_data,      "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	WRITE_ASS(sample_id_all,  "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	WRITE_ASS(exclude_host,   "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	WRITE_ASS(exclude_guest,  "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	WRITE_ASS(exclude_callchain_kernel, "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	WRITE_ASS(exclude_callchain_user, "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	WRITE_ASS(mmap2,	  "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	WRITE_ASS(comm_exec,	  "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	WRITE_ASS(context_switch, "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	WRITE_ASS(write_backward, "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	WRITE_ASS(namespaces,	  "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	WRITE_ASS(use_clockid,    "d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	WRITE_ASS(wakeup_events, PRIu32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	WRITE_ASS(bp_type, PRIu32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	WRITE_ASS(config1, "llu");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	WRITE_ASS(config2, "llu");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	WRITE_ASS(branch_sample_type, "llu");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	WRITE_ASS(sample_regs_user,   "llu");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	WRITE_ASS(sample_stack_user,  PRIu32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	fclose(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) void test_attr__open(struct perf_event_attr *attr, pid_t pid, int cpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		     int fd, int group_fd, unsigned long flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	int errno_saved = errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	if ((fd != -1) && store_event(attr, pid, cpu, fd, group_fd, flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		pr_err("test attr FAILED");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		exit(128);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	errno = errno_saved;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) void test_attr__ready(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	if (unlikely(test_attr__enabled) && !ready)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		ready = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static int run_dir(const char *d, const char *perf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	char v[] = "-vvvvv";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	int vcnt = min(verbose, (int) sizeof(v) - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	char cmd[3*PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	if (verbose > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		vcnt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	scnprintf(cmd, 3*PATH_MAX, PYTHON " %s/attr.py -d %s/attr/ -p %s %.*s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		  d, d, perf, vcnt, v);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	return system(cmd) ? TEST_FAIL : TEST_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) int test__attr(struct test *test __maybe_unused, int subtest __maybe_unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	struct stat st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	char path_perf[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	char path_dir[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	/* First try development tree tests. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	if (!lstat("./tests", &st))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		return run_dir("./tests", "./perf");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	/* Then installed path. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	snprintf(path_dir,  PATH_MAX, "%s/tests", get_argv_exec_path());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	snprintf(path_perf, PATH_MAX, "%s/perf", BINDIR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	if (!lstat(path_dir, &st) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	    !lstat(path_perf, &st))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		return run_dir(path_dir, path_perf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	return TEST_SKIP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }