[PATCH v2 07/14] perf mem: Support Arm SPE events

[Leo Yan]

This patch is to add Arm SPE events for perf memory profiling.  It
supports three Arm SPE events:

  - spe-load: memory event for only recording memory load ops;
  - spe-store: memory event for only recording memory store ops;
  - spe-ldst: memory event for recording memory load and store ops.

Signed-off-by: Leo Yan <leo.yan@xxxxxxxxxx>
---
 tools/perf/arch/arm64/util/Build        |  2 +-
 tools/perf/arch/arm64/util/mem-events.c | 46 +++++++++++++++++++++++++
 2 files changed, 47 insertions(+), 1 deletion(-)
 create mode 100644 tools/perf/arch/arm64/util/mem-events.c

diff --git a/tools/perf/arch/arm64/util/Build b/tools/perf/arch/arm64/util/Build
index 77f4d7b30932..df6c3d9ebaa6 100644
--- a/tools/perf/arch/arm64/util/Build
+++ b/tools/perf/arch/arm64/util/Build
@@ -9,4 +9,4 @@ perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
 perf-$(CONFIG_AUXTRACE) += ../../arm/util/pmu.o \
 			      ../../arm/util/auxtrace.o \
 			      ../../arm/util/cs-etm.o \
-			      arm-spe.o
+			      arm-spe.o mem-events.o
diff --git a/tools/perf/arch/arm64/util/mem-events.c b/tools/perf/arch/arm64/util/mem-events.c
new file mode 100644
index 000000000000..f23128db54fb
--- /dev/null
+++ b/tools/perf/arch/arm64/util/mem-events.c
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "map_symbol.h"
+#include "mem-events.h"
+
+#define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }
+
+static struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {
+	E("spe-load",	"arm_spe_0/ts_enable=1,load_filter=1,store_filter=0,min_latency=%u/",	"arm_spe_0"),
+	E("spe-store",	"arm_spe_0/ts_enable=1,load_filter=0,store_filter=1/",			"arm_spe_0"),
+	E("spe-ldst",	"arm_spe_0/ts_enable=1,load_filter=1,store_filter=1,min_latency=%u/",	"arm_spe_0"),
+};
+
+static char mem_ld_name[100];
+static char mem_st_name[100];
+static char mem_ldst_name[100];
+
+struct perf_mem_event *perf_mem_events__ptr(int i)
+{
+	if (i >= PERF_MEM_EVENTS__MAX)
+		return NULL;
+
+	return &perf_mem_events[i];
+}
+
+char *perf_mem_events__name(int i)
+{
+	struct perf_mem_event *e = perf_mem_events__ptr(i);
+
+	if (i >= PERF_MEM_EVENTS__MAX)
+		return NULL;
+
+	if (i == PERF_MEM_EVENTS__LOAD) {
+		scnprintf(mem_ld_name, sizeof(mem_ld_name),
+			  e->name, perf_mem_events__loads_ldlat);
+		return mem_ld_name;
+	}
+
+	if (i == PERF_MEM_EVENTS__STORE) {
+		scnprintf(mem_st_name, sizeof(mem_st_name), e->name);
+		return mem_st_name;
+	}
+
+	scnprintf(mem_ldst_name, sizeof(mem_ldst_name),
+		  e->name, perf_mem_events__loads_ldlat);
+	return mem_ldst_name;
+}
-- 
2.20.1