feat(trbe): add trace buffer control registers access test
Added a test to read trace buffer control registers to ensure that
EL3 is giving permission to non-secure EL2 to access these registers.
Change-Id: I70faa5bb7e0bc648fbc3d14cb9c1b8da3470a201
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
diff --git a/tftf/tests/extensions/trbe/test_trbe.c b/tftf/tests/extensions/trbe/test_trbe.c
new file mode 100644
index 0000000..8ef9576
--- /dev/null
+++ b/tftf/tests/extensions/trbe/test_trbe.c
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2021, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <string.h>
+
+#include <test_helpers.h>
+#include <tftf_lib.h>
+#include <tftf.h>
+
+/*
+ * EL3 is expected to allow access to trace control registers from EL2.
+ * Reading these register will trap to EL3 and crash when EL3 has not
+ * allowed access.
+ */
+test_result_t test_trbe_enabled(void)
+{
+ SKIP_TEST_IF_AARCH32();
+
+#ifdef __aarch64__
+ SKIP_TEST_IF_TRBE_NOT_SUPPORTED();
+ read_trblimitr_el1();
+ read_trbptr_el1();
+ read_trbbaser_el1();
+ read_trbsr_el1();
+ read_trbmar_el1();
+ read_trbtrg_el1();
+ read_trbidr_el1();
+ return TEST_RESULT_SUCCESS;
+#endif /* __aarch64__ */
+}