selftests/powerpc: Add tests of PMU EBBs

The Power8 Performance Monitor Unit (PMU) has a new feature called Event
Based Branches (EBB). This commit adds tests of the kernel API for using
EBBs.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 26 insertions, 0 deletions

diff --git a/tools/testing/selftests/powerpc/pmu/event.c b/tools/testing/selftests/powerpc/pmu/event.c
index 2b2d11df2450..184b36807d48 100644
--- a/tools/testing/selftests/powerpc/pmu/event.c
+++ b/tools/testing/selftests/powerpc/pmu/event.c
@@ -39,7 +39,13 @@ void event_init_named(struct event *e, u64 config, char *name)
 	event_init_opts(e, config, PERF_TYPE_RAW, name);
 }
 
+void event_init(struct event *e, u64 config)
+{
+	event_init_opts(e, config, PERF_TYPE_RAW, "event");
+}
+
 #define PERF_CURRENT_PID	0
+#define PERF_NO_PID		-1
 #define PERF_NO_CPU		-1
 #define PERF_NO_GROUP		-1
 
@@ -59,6 +65,16 @@ int event_open_with_group(struct event *e, int group_fd)
 	return event_open_with_options(e, PERF_CURRENT_PID, PERF_NO_CPU, group_fd);
 }
 
+int event_open_with_pid(struct event *e, pid_t pid)
+{
+	return event_open_with_options(e, pid, PERF_NO_CPU, PERF_NO_GROUP);
+}
+
+int event_open_with_cpu(struct event *e, int cpu)
+{
+	return event_open_with_options(e, PERF_NO_PID, cpu, PERF_NO_GROUP);
+}
+
 int event_open(struct event *e)
 {
 	return event_open_with_options(e, PERF_CURRENT_PID, PERF_NO_CPU, PERF_NO_GROUP);
@@ -69,6 +85,16 @@ void event_close(struct event *e)
 	close(e->fd);
 }
 
+int event_enable(struct event *e)
+{
+	return ioctl(e->fd, PERF_EVENT_IOC_ENABLE);
+}
+
+int event_disable(struct event *e)
+{
+	return ioctl(e->fd, PERF_EVENT_IOC_DISABLE);
+}
+
 int event_reset(struct event *e)
 {
 	return ioctl(e->fd, PERF_EVENT_IOC_RESET);