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-rw-r--r--tools/perf/tests/hwmon_pmu.c230
-rw-r--r--tools/perf/util/pmus.c7
-rw-r--r--tools/perf/util/pmus.h3
3 files changed, 240 insertions, 0 deletions
diff --git a/tools/perf/tests/hwmon_pmu.c b/tools/perf/tests/hwmon_pmu.c
index 111fc5c5618a..5c4114354c65 100644
--- a/tools/perf/tests/hwmon_pmu.c
+++ b/tools/perf/tests/hwmon_pmu.c
@@ -1,11 +1,239 @@
// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
#include "debug.h"
+#include "evlist.h"
#include "hwmon_pmu.h"
+#include "parse-events.h"
#include "tests.h"
+#include <fcntl.h>
+#include <sys/stat.h>
#include <linux/compiler.h>
#include <linux/kernel.h>
#include <linux/string.h>
+static const struct test_event {
+ const char *name;
+ const char *alias;
+ long config;
+} test_events[] = {
+ {
+ "temp_test_hwmon_event1",
+ "temp1",
+ 0xA0001,
+ },
+ {
+ "temp_test_hwmon_event2",
+ "temp2",
+ 0xA0002,
+ },
+};
+
+/* Cleanup test PMU directory. */
+static int test_pmu_put(const char *dir, struct perf_pmu *hwm)
+{
+ char buf[PATH_MAX + 20];
+ int ret;
+
+ if (scnprintf(buf, sizeof(buf), "rm -fr %s", dir) < 0) {
+ pr_err("Failure to set up buffer for \"%s\"\n", dir);
+ return -EINVAL;
+ }
+ ret = system(buf);
+ if (ret)
+ pr_err("Failure to \"%s\"\n", buf);
+
+ perf_pmu__delete(hwm);
+ return ret;
+}
+
+/*
+ * Prepare test PMU directory data, normally exported by kernel at
+ * /sys/class/hwmon/hwmon<number>/. Give as input a buffer to hold the file
+ * path, the result is PMU loaded using that directory.
+ */
+static struct perf_pmu *test_pmu_get(char *dir, size_t sz)
+{
+ const char *test_hwmon_name_nl = "A test hwmon PMU\n";
+ const char *test_hwmon_name = "A test hwmon PMU";
+ /* Simulated hwmon items. */
+ const struct test_item {
+ const char *name;
+ const char *value;
+ } test_items[] = {
+ { "temp1_label", "test hwmon event1\n", },
+ { "temp1_input", "40000\n", },
+ { "temp2_label", "test hwmon event2\n", },
+ { "temp2_input", "50000\n", },
+ };
+ int dirfd, file;
+ struct perf_pmu *hwm = NULL;
+ ssize_t len;
+
+ /* Create equivalent of sysfs mount point. */
+ scnprintf(dir, sz, "/tmp/perf-hwmon-pmu-test-XXXXXX");
+ if (!mkdtemp(dir)) {
+ pr_err("mkdtemp failed\n");
+ dir[0] = '\0';
+ return NULL;
+ }
+ dirfd = open(dir, O_DIRECTORY);
+ if (dirfd < 0) {
+ pr_err("Failed to open test directory \"%s\"\n", dir);
+ goto err_out;
+ }
+
+ /* Create the test hwmon directory and give it a name. */
+ if (mkdirat(dirfd, "hwmon1234", 0755) < 0) {
+ pr_err("Failed to mkdir hwmon directory\n");
+ goto err_out;
+ }
+ file = openat(dirfd, "hwmon1234/name", O_WRONLY | O_CREAT, 0600);
+ if (!file) {
+ pr_err("Failed to open for writing file \"name\"\n");
+ goto err_out;
+ }
+ len = strlen(test_hwmon_name_nl);
+ if (write(file, test_hwmon_name_nl, len) < len) {
+ close(file);
+ pr_err("Failed to write to 'name' file\n");
+ goto err_out;
+ }
+ close(file);
+
+ /* Create test hwmon files. */
+ for (size_t i = 0; i < ARRAY_SIZE(test_items); i++) {
+ const struct test_item *item = &test_items[i];
+
+ file = openat(dirfd, item->name, O_WRONLY | O_CREAT, 0600);
+ if (!file) {
+ pr_err("Failed to open for writing file \"%s\"\n", item->name);
+ goto err_out;
+ }
+
+ if (write(file, item->value, strlen(item->value)) < 0) {
+ pr_err("Failed to write to file \"%s\"\n", item->name);
+ close(file);
+ goto err_out;
+ }
+ close(file);
+ }
+
+ /* Make the PMU reading the files created above. */
+ hwm = perf_pmus__add_test_hwmon_pmu(dirfd, "hwmon1234", test_hwmon_name);
+ if (!hwm)
+ pr_err("Test hwmon creation failed\n");
+
+err_out:
+ if (!hwm) {
+ test_pmu_put(dir, hwm);
+ if (dirfd >= 0)
+ close(dirfd);
+ }
+ return hwm;
+}
+
+static int do_test(size_t i, bool with_pmu, bool with_alias)
+{
+ const char *test_event = with_alias ? test_events[i].alias : test_events[i].name;
+ struct evlist *evlist = evlist__new();
+ struct evsel *evsel;
+ struct parse_events_error err;
+ int ret;
+ char str[128];
+ bool found = false;
+
+ if (!evlist) {
+ pr_err("evlist allocation failed\n");
+ return TEST_FAIL;
+ }
+
+ if (with_pmu)
+ snprintf(str, sizeof(str), "/%s/", test_event);
+ else
+ strlcpy(str, test_event, sizeof(str));
+
+ pr_debug("Testing '%s'\n", str);
+ parse_events_error__init(&err);
+ ret = parse_events(evlist, str, &err);
+ if (ret) {
+ evlist__delete(evlist);
+
+ pr_debug("FAILED %s:%d failed to parse event '%s', err %d\n",
+ __FILE__, __LINE__, str, ret);
+ parse_events_error__print(&err, str);
+ ret = TEST_FAIL;
+ goto out;
+ }
+
+ ret = TEST_OK;
+ if (with_pmu ? (evlist->core.nr_entries != 1) : (evlist->core.nr_entries < 1)) {
+ pr_debug("FAILED %s:%d Unexpected number of events for '%s' of %d\n",
+ __FILE__, __LINE__, str, evlist->core.nr_entries);
+ ret = TEST_FAIL;
+ goto out;
+ }
+
+ evlist__for_each_entry(evlist, evsel) {
+ if (!perf_pmu__is_hwmon(evsel->pmu))
+ continue;
+
+ if (evsel->core.attr.config != (u64)test_events[i].config) {
+ pr_debug("FAILED %s:%d Unexpected config for '%s', %lld != %ld\n",
+ __FILE__, __LINE__, str,
+ evsel->core.attr.config,
+ test_events[i].config);
+ ret = TEST_FAIL;
+ goto out;
+ }
+ found = true;
+ }
+
+ if (!found) {
+ pr_debug("FAILED %s:%d Didn't find hwmon event '%s' in parsed evsels\n",
+ __FILE__, __LINE__, str);
+ ret = TEST_FAIL;
+ }
+
+out:
+ evlist__delete(evlist);
+ return ret;
+}
+
+static int test__hwmon_pmu(bool with_pmu)
+{
+ char dir[PATH_MAX];
+ struct perf_pmu *pmu = test_pmu_get(dir, sizeof(dir));
+ int ret = TEST_OK;
+
+ if (!pmu)
+ return TEST_FAIL;
+
+ for (size_t i = 0; i < ARRAY_SIZE(test_events); i++) {
+ ret = do_test(i, with_pmu, /*with_alias=*/false);
+
+ if (ret != TEST_OK)
+ break;
+
+ ret = do_test(i, with_pmu, /*with_alias=*/true);
+
+ if (ret != TEST_OK)
+ break;
+ }
+ test_pmu_put(dir, pmu);
+ return ret;
+}
+
+static int test__hwmon_pmu_without_pmu(struct test_suite *test __maybe_unused,
+ int subtest __maybe_unused)
+{
+ return test__hwmon_pmu(/*with_pmu=*/false);
+}
+
+static int test__hwmon_pmu_with_pmu(struct test_suite *test __maybe_unused,
+ int subtest __maybe_unused)
+{
+ return test__hwmon_pmu(/*with_pmu=*/false);
+}
+
static int test__parse_hwmon_filename(struct test_suite *test __maybe_unused,
int subtest __maybe_unused)
{
@@ -102,6 +330,8 @@ static int test__parse_hwmon_filename(struct test_suite *test __maybe_unused,
static struct test_case tests__hwmon_pmu[] = {
TEST_CASE("Basic parsing test", parse_hwmon_filename),
+ TEST_CASE("Parsing without PMU name", hwmon_pmu_without_pmu),
+ TEST_CASE("Parsing with PMU name", hwmon_pmu_with_pmu),
{ .name = NULL, }
};
diff --git a/tools/perf/util/pmus.c b/tools/perf/util/pmus.c
index 5c3e88adb9e6..451c6e00ad70 100644
--- a/tools/perf/util/pmus.c
+++ b/tools/perf/util/pmus.c
@@ -733,6 +733,13 @@ struct perf_pmu *perf_pmus__add_test_pmu(int test_sysfs_dirfd, const char *name)
return perf_pmu__lookup(&other_pmus, test_sysfs_dirfd, name, /*eager_load=*/true);
}
+struct perf_pmu *perf_pmus__add_test_hwmon_pmu(int hwmon_dir,
+ const char *sysfs_name,
+ const char *name)
+{
+ return hwmon_pmu__new(&other_pmus, hwmon_dir, sysfs_name, name);
+}
+
struct perf_pmu *perf_pmus__fake_pmu(void)
{
static struct perf_pmu fake = {
diff --git a/tools/perf/util/pmus.h b/tools/perf/util/pmus.h
index e1742b56eec7..a0cb0eb2ff97 100644
--- a/tools/perf/util/pmus.h
+++ b/tools/perf/util/pmus.h
@@ -30,6 +30,9 @@ bool perf_pmus__supports_extended_type(void);
char *perf_pmus__default_pmu_name(void);
struct perf_pmu *perf_pmus__add_test_pmu(int test_sysfs_dirfd, const char *name);
+struct perf_pmu *perf_pmus__add_test_hwmon_pmu(int hwmon_dir,
+ const char *sysfs_name,
+ const char *name);
struct perf_pmu *perf_pmus__fake_pmu(void);
#endif /* __PMUS_H */
generated by cgit (git 2.34.1) at 2025-07-15 09:56:18 +0000