From: John Garry john.garry@huawei.com
mainline inclusion from mainline-v5.15-rc1 commit 3bc4526b30f1 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I63VF5 CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
--------------------------------------------------------------------------
The current method to test uncore event aliasing is limited, as it relies on the uncore PMU being present in the host system to test.
As such, breakages of uncore PMU aliases goes unnoticed. To make this more robust, a new method of testing uncore PMUs with fake PMUs will be used in future. This will be separate to testing core PMU aliases.
So make the current test function core PMU only. Uncore PMU alias support will be re-added later.
Signed-off-by: John Garry john.garry@huawei.com Cc: Alexander Shishkin alexander.shishkin@linux.intel.com Cc: Ian Rogers irogers@google.com Cc: Ingo Molnar mingo@redhat.com Cc: Jin Yao yao.jin@linux.intel.com Cc: Jiri Olsa jolsa@redhat.com Cc: Mark Rutland mark.rutland@arm.com Cc: Namhyung Kim namhyung@kernel.org Cc: Peter Zijlstra peterz@infradead.org Cc: linuxarm@huawei.com Link: https //lore.kernel.org/r/1627566986-30605-6-git-send-email-john.garry@huawei.com Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Junhao He hejunhao3@huawei.com --- tools/perf/tests/pmu-events.c | 45 +++++++++++++---------------------- 1 file changed, 16 insertions(+), 29 deletions(-)
diff --git a/tools/perf/tests/pmu-events.c b/tools/perf/tests/pmu-events.c index 1b3a9b861aa1..7586f8a35fe7 100644 --- a/tools/perf/tests/pmu-events.c +++ b/tools/perf/tests/pmu-events.c @@ -350,26 +350,19 @@ static struct perf_pmu_alias *find_alias(const char *test_event, struct list_hea }
/* Verify aliases are as expected */ -static int __test__pmu_event_aliases(char *pmu_name, int *count) +static int __test_core_pmu_event_aliases(char *pmu_name, int *count) { struct perf_pmu_test_event const **test_event_table; struct perf_pmu *pmu; LIST_HEAD(aliases); int res = 0; - bool use_uncore_table; struct pmu_events_map *map = __test_pmu_get_events_map(); struct perf_pmu_alias *a, *tmp;
if (!map) return -1;
- if (is_pmu_core(pmu_name)) { - test_event_table = &core_events[0]; - use_uncore_table = false; - } else { - test_event_table = &uncore_events[0]; - use_uncore_table = true; - } + test_event_table = &core_events[0];
pmu = zalloc(sizeof(*pmu)); if (!pmu) @@ -382,20 +375,10 @@ static int __test__pmu_event_aliases(char *pmu_name, int *count) for (; *test_event_table; test_event_table++) { struct perf_pmu_test_event const *test_event = *test_event_table; struct pmu_event const *event = &test_event->event; - struct perf_pmu_alias *alias = find_alias(event->name, &aliases);
if (!alias) { - bool uncore_match = pmu_uncore_alias_match(pmu_name, - event->pmu); - - if (use_uncore_table && !uncore_match) { - pr_debug3("testing aliases PMU %s: skip matching alias %s\n", - pmu_name, event->name); - continue; - } - - pr_debug2("testing aliases PMU %s: no alias, alias_table->name=%s\n", + pr_debug("testing aliases core PMU %s: no alias, alias_table->name=%s\n", pmu_name, event->name); res = -1; break; @@ -407,7 +390,7 @@ static int __test__pmu_event_aliases(char *pmu_name, int *count) }
(*count)++; - pr_debug2("testing aliases PMU %s: matched event %s\n", + pr_debug2("testing aliases core PMU %s: matched event %s\n", pmu_name, alias->name); }
@@ -419,7 +402,6 @@ static int __test__pmu_event_aliases(char *pmu_name, int *count) return res; }
- /* Test that aliases generated are as expected */ static int test_aliases(void) { @@ -428,21 +410,26 @@ static int test_aliases(void) while ((pmu = perf_pmu__scan(pmu)) != NULL) { int count = 0;
+ if (!is_pmu_core(pmu->name)) + continue; + if (list_empty(&pmu->format)) { - pr_debug2("skipping testing PMU %s\n", pmu->name); + pr_debug2("skipping testing core PMU %s\n", pmu->name); continue; }
- if (__test__pmu_event_aliases(pmu->name, &count)) { - pr_debug("testing PMU %s aliases: failed\n", pmu->name); + if (__test_core_pmu_event_aliases(pmu->name, &count)) { + pr_debug("testing core PMU %s aliases: failed\n", pmu->name); return -1; }
- if (count == 0) - pr_debug3("testing PMU %s aliases: no events to match\n", + if (count == 0) { + pr_debug("testing core PMU %s aliases: no events to match\n", pmu->name); - else - pr_debug("testing PMU %s aliases: pass\n", pmu->name); + return -1; + } + + pr_debug("testing core PMU %s aliases: pass\n", pmu->name); }
return 0;