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-rw-r--r--tools/testing/selftests/powerpc/benchmarks/Makefile1
-rw-r--r--tools/testing/selftests/powerpc/benchmarks/context_switch.c11
2 files changed, 9 insertions, 3 deletions
diff --git a/tools/testing/selftests/powerpc/benchmarks/Makefile b/tools/testing/selftests/powerpc/benchmarks/Makefile
index 912445ff7ce7..6816fc2140cb 100644
--- a/tools/testing/selftests/powerpc/benchmarks/Makefile
+++ b/tools/testing/selftests/powerpc/benchmarks/Makefile
@@ -7,6 +7,7 @@ all: $(TEST_PROGS)
$(TEST_PROGS): ../harness.c
context_switch: ../utils.c
+context_switch: CFLAGS += -maltivec -mvsx -mabi=altivec
context_switch: LDLIBS += -lpthread
include ../../lib.mk
diff --git a/tools/testing/selftests/powerpc/benchmarks/context_switch.c b/tools/testing/selftests/powerpc/benchmarks/context_switch.c
index e6af382a305a..a36883ad48a4 100644
--- a/tools/testing/selftests/powerpc/benchmarks/context_switch.c
+++ b/tools/testing/selftests/powerpc/benchmarks/context_switch.c
@@ -25,7 +25,9 @@
#include <sys/types.h>
#include <sys/shm.h>
#include <linux/futex.h>
-
+#ifdef __powerpc__
+#include <altivec.h>
+#endif
#include "../utils.h"
static unsigned int timeout = 30;
@@ -37,12 +39,15 @@ static int touch_fp = 1;
double fp;
static int touch_vector = 1;
-typedef int v4si __attribute__ ((vector_size (16)));
-v4si a, b, c;
+vector int a, b, c;
#ifdef __powerpc__
static int touch_altivec = 1;
+/*
+ * Note: LTO (Link Time Optimisation) doesn't play well with this function
+ * attribute. Be very careful enabling LTO for this test.
+ */
static void __attribute__((__target__("no-vsx"))) altivec_touch_fn(void)
{
c = a + b;