perf mem: Support record for hybrid platform

Support 'perf mem record' for hybrid platform. On hybrid platform,
such as Alderlake, when executing 'perf mem record', it actually calls:

record -e {cpu_core/mem-loads-aux/,cpu_core/mem-loads,ldlat=30/}:P
       -e cpu_atom/mem-loads,ldlat=30/P
       -e cpu_core/mem-stores/P
       -e cpu_atom/mem-stores/P

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210527001610.10553-6-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 67 insertions, 0 deletions

diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
index 69dcac730ada..f38c0da9e698 100644
--- a/tools/perf/util/mem-events.c
+++ b/tools/perf/util/mem-events.c
@@ -166,6 +166,71 @@ void perf_mem_events__list(void)
 	}
 }
 
+static void perf_mem_events__print_unsupport_hybrid(struct perf_mem_event *e,
+						    int idx)
+{
+	const char *mnt = sysfs__mount();
+	char sysfs_name[100];
+	struct perf_pmu *pmu;
+
+	perf_pmu__for_each_hybrid_pmu(pmu) {
+		scnprintf(sysfs_name, sizeof(sysfs_name), e->sysfs_name,
+			  pmu->name);
+		if (!perf_mem_event__supported(mnt, sysfs_name)) {
+			pr_err("failed: event '%s' not supported\n",
+			       perf_mem_events__name(idx, pmu->name));
+		}
+	}
+}
+
+int perf_mem_events__record_args(const char **rec_argv, int *argv_nr,
+				 char **rec_tmp, int *tmp_nr)
+{
+	int i = *argv_nr, k = 0;
+	struct perf_mem_event *e;
+	struct perf_pmu *pmu;
+	char *s;
+
+	for (int j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
+		e = perf_mem_events__ptr(j);
+		if (!e->record)
+			continue;
+
+		if (!perf_pmu__has_hybrid()) {
+			if (!e->supported) {
+				pr_err("failed: event '%s' not supported\n",
+				       perf_mem_events__name(j, NULL));
+				return -1;
+			}
+
+			rec_argv[i++] = "-e";
+			rec_argv[i++] = perf_mem_events__name(j, NULL);
+		} else {
+			if (!e->supported) {
+				perf_mem_events__print_unsupport_hybrid(e, j);
+				return -1;
+			}
+
+			perf_pmu__for_each_hybrid_pmu(pmu) {
+				rec_argv[i++] = "-e";
+				s = perf_mem_events__name(j, pmu->name);
+				if (s) {
+					s = strdup(s);
+					if (!s)
+						return -1;
+
+					rec_argv[i++] = s;
+					rec_tmp[k++] = s;
+				}
+			}
+		}
+	}
+
+	*argv_nr = i;
+	*tmp_nr = k;
+	return 0;
+}
+
 static const char * const tlb_access[] = {
 	"N/A",
 	"HIT",
diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h
index a3fa19093fd2..916242f8020a 100644
--- a/tools/perf/util/mem-events.h
+++ b/tools/perf/util/mem-events.h
@@ -43,6 +43,8 @@ struct perf_mem_event *perf_mem_events__ptr(int i);
 bool is_mem_loads_aux_event(struct evsel *leader);
 
 void perf_mem_events__list(void);
+int perf_mem_events__record_args(const char **rec_argv, int *argv_nr,
+				 char **rec_tmp, int *tmp_nr);
 
 int perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
 int perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info);