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Diffstat (limited to 'tools/testing/selftests/powerpc/pmu/ebb/reg_access_test.c')
-rw-r--r--tools/testing/selftests/powerpc/pmu/ebb/reg_access_test.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test.c b/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test.c
new file mode 100644
index 000000000000..0cae66f659a3
--- /dev/null
+++ b/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test.c
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "ebb.h"
+#include "reg.h"
+
+
+/*
+ * Test basic access to the EBB regs, they should be user accessible with no
+ * kernel interaction required.
+ */
+int reg_access(void)
+{
+ uint64_t val, expected;
+
+ expected = 0x8000000100000000ull;
+ mtspr(SPRN_BESCR, expected);
+ val = mfspr(SPRN_BESCR);
+
+ FAIL_IF(val != expected);
+
+ expected = 0x0000000001000000ull;
+ mtspr(SPRN_EBBHR, expected);
+ val = mfspr(SPRN_EBBHR);
+
+ FAIL_IF(val != expected);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(reg_access, "reg_access");
+}