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Factor out the pmu_aliases_parse to allow this. Parse a test event and check it configures the attribute as expected. There is overlap with the parse-events tests, but this test is done with a PMU created in a temp directory and doesn't rely on PMUs in sysfs. Signed-off-by: Ian Rogers Reviewed-by: Kan Liang --- tools/perf/tests/pmu.c | 76 ++++++++++++++++++++++++++++++++++++++++++ tools/perf/util/pmu.c | 69 ++++++++++++++++++++++++++------------ 2 files changed, 124 insertions(+), 21 deletions(-) diff --git a/tools/perf/tests/pmu.c b/tools/perf/tests/pmu.c index 424ebdb0f09d..071cfc51b52c 100644 --- a/tools/perf/tests/pmu.c +++ b/tools/perf/tests/pmu.c @@ -1,4 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 +#include "evlist.h" +#include "evsel.h" #include "parse-events.h" #include "pmu.h" #include "tests.h" @@ -54,6 +56,9 @@ static struct perf_pmu *test_pmu_get(char *dir, size_t sz) { "krava22", "config2:8,18,48,58\n", }, { "krava23", "config2:28-29,38\n", }, }; + const char *test_event =3D "krava01=3D15,krava02=3D170,krava03=3D1,krava1= 1=3D27,krava12=3D1," + "krava13=3D2,krava21=3D119,krava22=3D11,krava23=3D2\n"; + char name[PATH_MAX]; int dirfd, file; struct perf_pmu *pmu =3D NULL; @@ -116,6 +121,24 @@ static struct perf_pmu *test_pmu_get(char *dir, size_t= sz) close(file); } =20 + /* Create test event. */ + if (mkdirat(dirfd, "perf-pmu-test/events", 0755) < 0) { + pr_err("Failed to mkdir PMU events directory\n"); + goto err_out; + } + file =3D openat(dirfd, "perf-pmu-test/events/test-event", O_WRONLY | O_CR= EAT, 0600); + if (!file) { + pr_err("Failed to open for writing file \"type\"\n"); + goto err_out; + } + len =3D strlen(test_event); + if (write(file, test_event, len) < len) { + close(file); + pr_err("Failed to write to 'test-event' file\n"); + goto err_out; + } + close(file); + /* Make the PMU reading the files created above. */ pmu =3D perf_pmus__add_test_pmu(dirfd, "perf-pmu-test"); if (!pmu) @@ -176,8 +199,61 @@ static int test__pmu_format(struct test_suite *test __= maybe_unused, int subtest return ret; } =20 +static int test__pmu_events(struct test_suite *test __maybe_unused, int su= btest __maybe_unused) +{ + char dir[PATH_MAX]; + struct parse_events_error err; + struct evlist *evlist; + struct evsel *evsel; + struct perf_event_attr *attr; + int ret =3D TEST_FAIL; + struct perf_pmu *pmu =3D test_pmu_get(dir, sizeof(dir)); + const char *event =3D "perf-pmu-test/test-event/"; + + + if (!pmu) + return TEST_FAIL; + + evlist =3D evlist__new(); + if (evlist =3D=3D NULL) { + pr_err("Failed allocation"); + goto err_out; + } + parse_events_error__init(&err); + ret =3D parse_events(evlist, event, &err); + if (ret) { + pr_debug("failed to parse event '%s', err %d\n", event, ret); + parse_events_error__print(&err, event); + if (parse_events_error__contains(&err, "can't access trace events")) + ret =3D TEST_SKIP; + goto err_out; + } + evsel =3D evlist__first(evlist); + attr =3D &evsel->core.attr; + if (attr->config !=3D 0xc00000000002a823) { + pr_err("Unexpected config value %llx\n", attr->config); + goto err_out; + } + if (attr->config1 !=3D 0x8000400000000145) { + pr_err("Unexpected config1 value %llx\n", attr->config1); + goto err_out; + } + if (attr->config2 !=3D 0x0400000020041d07) { + pr_err("Unexpected config2 value %llx\n", attr->config2); + goto err_out; + } + + ret =3D TEST_OK; +err_out: + parse_events_error__exit(&err); + evlist__delete(evlist); + test_pmu_put(dir, pmu); + return ret; +} + static struct test_case tests__pmu[] =3D { TEST_CASE("Parsing with PMU format directory", pmu_format), + TEST_CASE("Parsing with PMU event", pmu_events), { .name =3D NULL, } }; =20 diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index fbbc535ed93f..7849be4bfea1 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -597,33 +597,18 @@ static inline bool pmu_alias_info_file(const char *na= me) * Reading the pmu event aliases definition, which should be located at: * /sys/bus/event_source/devices//events as sysfs group attributes. */ -static int pmu_aliases_parse(struct perf_pmu *pmu) +static int __pmu_aliases_parse(struct perf_pmu *pmu, int events_dir_fd) { - char path[PATH_MAX]; struct dirent *evt_ent; DIR *event_dir; - size_t len; - int fd, dir_fd; =20 - len =3D perf_pmu__event_source_devices_scnprintf(path, sizeof(path)); - if (!len) - return 0; - scnprintf(path + len, sizeof(path) - len, "%s/events", pmu->name); - - dir_fd =3D open(path, O_DIRECTORY); - if (dir_fd =3D=3D -1) { - pmu->sysfs_aliases_loaded =3D true; - return 0; - } - - event_dir =3D fdopendir(dir_fd); - if (!event_dir){ - close (dir_fd); + event_dir =3D fdopendir(events_dir_fd); + if (!event_dir) return -EINVAL; - } =20 while ((evt_ent =3D readdir(event_dir))) { char *name =3D evt_ent->d_name; + int fd; FILE *file; =20 if (!strcmp(name, ".") || !strcmp(name, "..")) @@ -635,7 +620,7 @@ static int pmu_aliases_parse(struct perf_pmu *pmu) if (pmu_alias_info_file(name)) continue; =20 - fd =3D openat(dir_fd, name, O_RDONLY); + fd =3D openat(events_dir_fd, name, O_RDONLY); if (fd =3D=3D -1) { pr_debug("Cannot open %s\n", name); continue; @@ -653,11 +638,50 @@ static int pmu_aliases_parse(struct perf_pmu *pmu) } =20 closedir(event_dir); - close (dir_fd); pmu->sysfs_aliases_loaded =3D true; return 0; } =20 +static int pmu_aliases_parse(struct perf_pmu *pmu) +{ + char path[PATH_MAX]; + size_t len; + int events_dir_fd, ret; + + if (pmu->sysfs_aliases_loaded) + return 0; + + len =3D perf_pmu__event_source_devices_scnprintf(path, sizeof(path)); + if (!len) + return 0; + scnprintf(path + len, sizeof(path) - len, "%s/events", pmu->name); + + events_dir_fd =3D open(path, O_DIRECTORY); + if (events_dir_fd =3D=3D -1) { + pmu->sysfs_aliases_loaded =3D true; + return 0; + } + ret =3D __pmu_aliases_parse(pmu, events_dir_fd); + close(events_dir_fd); + return ret; +} + +static int pmu_aliases_parse_eager(struct perf_pmu *pmu, int sysfs_fd) +{ + char path[FILENAME_MAX + 7]; + int ret, events_dir_fd; + + scnprintf(path, sizeof(path), "%s/events", pmu->name); + events_dir_fd =3D openat(sysfs_fd, path, O_DIRECTORY, 0); + if (events_dir_fd =3D=3D -1) { + pmu->sysfs_aliases_loaded =3D true; + return 0; + } + ret =3D __pmu_aliases_parse(pmu, events_dir_fd); + close(events_dir_fd); + return ret; +} + static int pmu_alias_terms(struct perf_pmu_alias *alias, int err_loc, stru= ct list_head *terms) { struct parse_events_term *term, *cloned; @@ -1042,6 +1066,9 @@ struct perf_pmu *perf_pmu__lookup(struct list_head *p= mus, int dirfd, const char =20 perf_pmu__arch_init(pmu); =20 + if (eager_load) + pmu_aliases_parse_eager(pmu, dirfd); + return pmu; err: zfree(&pmu->name); --=20 2.45.0.rc1.225.g2a3ae87e7f-goog