1 files changed, 107 insertions, 0 deletions
diff --git a/tools/perf/arch/x86/util/mem-events.c b/tools/perf/arch/x86/util/mem-events.c
new file mode 100644
index 000000000000..f683ac702247
--- /dev/null
+++ b/tools/perf/arch/x86/util/mem-events.c
@@ -0,0 +1,107 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "util/pmu.h"
+#include "util/env.h"
+#include "map_symbol.h"
+#include "mem-events.h"
+#include "linux/string.h"
+
+static char mem_loads_name[100];
+static bool mem_loads_name__init;
+static char mem_stores_name[100];
+
+#define MEM_LOADS_AUX		0x8203
+#define MEM_LOADS_AUX_NAME     "{%s/mem-loads-aux/,%s/mem-loads,ldlat=%u/}:P"
+
+#define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }
+
+static struct perf_mem_event perf_mem_events_intel[PERF_MEM_EVENTS__MAX] = {
+	E("ldlat-loads",	"%s/mem-loads,ldlat=%u/P",	"%s/events/mem-loads"),
+	E("ldlat-stores",	"%s/mem-stores/P",		"%s/events/mem-stores"),
+	E(NULL,			NULL,				NULL),
+};
+
+static struct perf_mem_event perf_mem_events_amd[PERF_MEM_EVENTS__MAX] = {
+	E(NULL,		NULL,		NULL),
+	E(NULL,		NULL,		NULL),
+	E("mem-ldst",	"ibs_op//",	"ibs_op"),
+};
+
+static int perf_mem_is_amd_cpu(void)
+{
+	struct perf_env env = { .total_mem = 0, };
+
+	perf_env__cpuid(&env);
+	if (env.cpuid && strstarts(env.cpuid, "AuthenticAMD"))
+		return 1;
+	return -1;
+}
+
+struct perf_mem_event *perf_mem_events__ptr(int i)
+{
+	/* 0: Uninitialized, 1: Yes, -1: No */
+	static int is_amd;
+
+	if (i >= PERF_MEM_EVENTS__MAX)
+		return NULL;
+
+	if (!is_amd)
+		is_amd = perf_mem_is_amd_cpu();
+
+	if (is_amd == 1)
+		return &perf_mem_events_amd[i];
+
+	return &perf_mem_events_intel[i];
+}
+
+bool is_mem_loads_aux_event(struct evsel *leader)
+{
+	if (perf_pmu__find("cpu")) {
+		if (!pmu_have_event("cpu", "mem-loads-aux"))
+			return false;
+	} else if (perf_pmu__find("cpu_core")) {
+		if (!pmu_have_event("cpu_core", "mem-loads-aux"))
+			return false;
+	}
+
+	return leader->core.attr.config == MEM_LOADS_AUX;
+}
+
+char *perf_mem_events__name(int i, char *pmu_name)
+{
+	struct perf_mem_event *e = perf_mem_events__ptr(i);
+
+	if (!e)
+		return NULL;
+
+	if (i == PERF_MEM_EVENTS__LOAD) {
+		if (mem_loads_name__init && !pmu_name)
+			return mem_loads_name;
+
+		if (!pmu_name) {
+			mem_loads_name__init = true;
+			pmu_name = (char *)"cpu";
+		}
+
+		if (pmu_have_event(pmu_name, "mem-loads-aux")) {
+			scnprintf(mem_loads_name, sizeof(mem_loads_name),
+				  MEM_LOADS_AUX_NAME, pmu_name, pmu_name,
+				  perf_mem_events__loads_ldlat);
+		} else {
+			scnprintf(mem_loads_name, sizeof(mem_loads_name),
+				  e->name, pmu_name,
+				  perf_mem_events__loads_ldlat);
+		}
+		return mem_loads_name;
+	}
+
+	if (i == PERF_MEM_EVENTS__STORE) {
+		if (!pmu_name)
+			pmu_name = (char *)"cpu";
+
+		scnprintf(mem_stores_name, sizeof(mem_stores_name),
+			  e->name, pmu_name);
+		return mem_stores_name;
+	}
+
+	return (char *)e->name;
+}