Add a test for Unknown SMC

The Unkonwn SMC path may get tested implicitly by other tests, but it's
good to have a directed one. This patch adds a test case that makes
an SMC calls with function identifier known to fall in the reserved
range, so the return value of 'unknown SMC' is expected.

Change-Id: I3e82d48b69ca7e6fea4367ae2d6b1d30e80a079e
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>

3 files changed, 59 insertions, 0 deletions

diff --git a/tests/runtime_services/standard_service/unknown_smc.c b/tests/runtime_services/standard_service/unknown_smc.c
new file mode 100644
index 0000000..6865af0
--- /dev/null
+++ b/tests/runtime_services/standard_service/unknown_smc.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <smc.h>
+#include <std_svc.h>
+#include <tftf_lib.h>
+#include <uuid_utils.h>
+
+/* Invalid SMC FID: chose an identifier that falls in the reserved space */
+#define INVALID_FID     (0x00ff0000 | (1u << 31))
+
+/**
+ * @Test_Aim@ Force an SMC_UNKNOWN return
+ */
+test_result_t test_unknown_smc(void)
+{
+	smc_args unk_smc;
+	smc_ret_values ret;
+
+	unk_smc.arg0 = INVALID_FID;
+	ret = tftf_smc(&unk_smc);
+
+	if (ret.ret0 != SMC_UNKNOWN) {
+		tftf_testcase_printf("Expected SMC_UNKNOWN, got %ld\n",
+				(long int) ret.ret0);
+		return TEST_RESULT_FAIL;
+	}
+
+	return TEST_RESULT_SUCCESS;
+}
diff --git a/tests/tests-psci.xml b/tests/tests-psci.xml
index 913f8b4..f2fd6b1 100644
--- a/tests/tests-psci.xml
+++ b/tests/tests-psci.xml
@@ -19,6 +19,7 @@
       nonetheless to avoid having it alone in a separate XML file.
   -->
   <testsuite name="Query runtime services" description="Generic queries as defined by the SMCCC">
+    <testcase name="Unknown SMC" function="test_unknown_smc" />
     <testcase name="Query Standard Service" function="test_query_std_svc" />
   </testsuite>
 
diff --git a/tests/tests.mk b/tests/tests.mk
index ec64b84..ede5add 100644
--- a/tests/tests.mk
+++ b/tests/tests.mk
@@ -36,6 +36,7 @@ TESTS_SOURCES	:=	tests/extensions/amu/test_amu.c					\
 			tests/runtime_services/standard_service/psci/api_tests/mem_protect_check/mem_protect_check.c \
 			tests/runtime_services/standard_service/psci/api_tests/reset2/reset2.c \
 			tests/runtime_services/standard_service/query_std_svc.c \
+			tests/runtime_services/standard_service/unknown_smc.c \
 			tests/runtime_services/standard_service/sdei/system_tests/sdei_entrypoint.S \
 			tests/runtime_services/standard_service/sdei/system_tests/test_sdei.c \
 			tests/runtime_services/standard_service/sdei/system_tests/test_sdei_state.c \