From: Madhavan Srinivasan <ma...@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <ma...@linux.ibm.com>
---
.../pmu/mem_counters/imc_global_lock_test.c | 49 ++++++++++++++++++-
1 file changed, 48 insertions(+), 1 deletion(-)
diff --git
a/tools/testing/selftests/powerpc/pmu/mem_counters/imc_global_lock_test.c
b/tools/testing/selftests/powerpc/pmu/mem_counters/imc_global_lock_test.c
index ea687ffc1990..f643dba8ecc0 100644
--- a/tools/testing/selftests/powerpc/pmu/mem_counters/imc_global_lock_test.c
+++ b/tools/testing/selftests/powerpc/pmu/mem_counters/imc_global_lock_test.c
@@ -5,9 +5,56 @@
#include "mem_counters.h"
+static bool check_imc_interface_glob_lck(void)
+{
+ if (!access("/sys/devices/thread_imc/interface/glob_lck", F_OK))
+ return true;
+
+ return false;
+}
+
static int testcase(void)
{
- return 0;
+ struct event events[2];
+
+ if (!check_imc_interface_glob_lck()) {
+ printf("Test not supported\n");
+ return MAGIC_SKIP_RETURN_VALUE;
+ }
+
+ if (!is_mem_counters_device_enabled(CORE) ||
!is_mem_counters_device_enabled(THREAD)) {
+ printf("%s: IMC device not found. So exiting the test\n",
__FUNCTION__);
+ return -1;
+ }
+
+ if (setup_mem_counters_event(THREAD, &events[0], 0xe0,
"thread_imc/cycles")) {
+ printf("%s setup_mem_counters_event for thread_imc failed\n",
__FUNCTION__);
+ return -1;
+ }
+
+ if (setup_mem_counters_event(CORE, &events[1], 0xe0,
"core_imc/cycles")) {
+ printf("%s setup_mem_counters_event for core_imc failed\n",
__FUNCTION__);
+ return -1;
+ }
+
+ if (event_open(&events[0])) {
+ perror("thread_imc: perf_event_open");
+ return -1;
+ }
+
+ /*
+ * If we have the Global lock patchset applied to kernel
+ * event_open for events[1] should fail with resource busy
+ */
+ if (event_open_with_cpu(&events[1], 0)) {
+ /*
+ * Check for the errno to certify the test result
+ */
+ if (errno == 16) // Resource busy (EBUSY)
+ return 0;
+ }
+
+ return -1;
}
static int imc_global_lock_test(void)
--
2.20.1
