Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / tools / testing / selftests / powerpc / pmu / ebb / no_handler_test.c

diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/no_handler_test.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/no_handler_test.c
new file mode 100644 (file)
index 0000000..2f9bf8e
--- /dev/null
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/no_handler_test.c
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <setjmp.h>
+#include <signal.h>
+
+#include "ebb.h"
+
+
+/* Test that things work sanely if we have no handler */
+
+static int no_handler_test(void)
+{
+       struct event event;
+       u64 val;
+       int i;
+
+       event_init_named(&event, 0x1001e, "cycles");
+       event_leader_ebb_init(&event);
+
+       event.attr.exclude_kernel = 1;
+       event.attr.exclude_hv = 1;
+       event.attr.exclude_idle = 1;
+
+       FAIL_IF(event_open(&event));
+       FAIL_IF(ebb_event_enable(&event));
+
+       val = mfspr(SPRN_EBBHR);
+       FAIL_IF(val != 0);
+
+       /* Make sure it overflows quickly */
+       sample_period = 1000;
+       mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
+
+       /* Spin to make sure the event has time to overflow */
+       for (i = 0; i < 1000; i++)
+               mb();
+
+       dump_ebb_state();
+
+       /* We expect to see the PMU frozen & PMAO set */
+       val = mfspr(SPRN_MMCR0);
+       FAIL_IF(val != 0x0000000080000080);
+
+       event_close(&event);
+
+       dump_ebb_state();
+
+       /* The real test is that we never took an EBB at 0x0 */
+
+       return 0;
+}
+
+int main(void)
+{
+       return test_harness(no_handler_test,"no_handler_test");
+}