From 313a4db7f3387608a3ab4531ac8c0509a3d7617f Mon Sep 17 00:00:00 2001
From: Cristian Marussi <cristian.marussi@arm.com>
Date: Fri, 25 Oct 2019 18:57:06 +0100
Subject: kselftest: arm64: extend toplevel skeleton Makefile

Modify KSFT arm64 toplevel Makefile to maintain arm64 kselftests organized
by subsystem, keeping them into distinct subdirectories under arm64 custom
KSFT directory: tools/testing/selftests/arm64/

Add to such toplevel Makefile a mechanism to guess the effective location
of Kernel headers as installed by KSFT framework.

Fit existing arm64 tags kselftest into this new schema moving them into
their own subdirectory (arm64/tags).

Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 tools/testing/selftests/arm64/tags/.gitignore      |  1 +
 tools/testing/selftests/arm64/tags/Makefile        |  7 +++++
 .../testing/selftests/arm64/tags/run_tags_test.sh  | 12 +++++++++
 tools/testing/selftests/arm64/tags/tags_test.c     | 31 ++++++++++++++++++++++
 4 files changed, 51 insertions(+)
 create mode 100644 tools/testing/selftests/arm64/tags/.gitignore
 create mode 100644 tools/testing/selftests/arm64/tags/Makefile
 create mode 100755 tools/testing/selftests/arm64/tags/run_tags_test.sh
 create mode 100644 tools/testing/selftests/arm64/tags/tags_test.c

(limited to 'tools/testing/selftests/arm64/tags')

diff --git a/tools/testing/selftests/arm64/tags/.gitignore b/tools/testing/selftests/arm64/tags/.gitignore
new file mode 100644
index 000000000000..e8fae8d61ed6
--- /dev/null
+++ b/tools/testing/selftests/arm64/tags/.gitignore
@@ -0,0 +1 @@
+tags_test
diff --git a/tools/testing/selftests/arm64/tags/Makefile b/tools/testing/selftests/arm64/tags/Makefile
new file mode 100644
index 000000000000..41cb75070511
--- /dev/null
+++ b/tools/testing/selftests/arm64/tags/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
+
+CFLAGS += -I../../../../../usr/include/
+TEST_GEN_PROGS := tags_test
+TEST_PROGS := run_tags_test.sh
+
+include ../../lib.mk
diff --git a/tools/testing/selftests/arm64/tags/run_tags_test.sh b/tools/testing/selftests/arm64/tags/run_tags_test.sh
new file mode 100755
index 000000000000..745f11379930
--- /dev/null
+++ b/tools/testing/selftests/arm64/tags/run_tags_test.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+echo "--------------------"
+echo "running tags test"
+echo "--------------------"
+./tags_test
+if [ $? -ne 0 ]; then
+	echo "[FAIL]"
+else
+	echo "[PASS]"
+fi
diff --git a/tools/testing/selftests/arm64/tags/tags_test.c b/tools/testing/selftests/arm64/tags/tags_test.c
new file mode 100644
index 000000000000..5701163460ef
--- /dev/null
+++ b/tools/testing/selftests/arm64/tags/tags_test.c
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <sys/prctl.h>
+#include <sys/utsname.h>
+
+#define SHIFT_TAG(tag)		((uint64_t)(tag) << 56)
+#define SET_TAG(ptr, tag)	(((uint64_t)(ptr) & ~SHIFT_TAG(0xff)) | \
+					SHIFT_TAG(tag))
+
+int main(void)
+{
+	static int tbi_enabled = 0;
+	unsigned long tag = 0;
+	struct utsname *ptr;
+	int err;
+
+	if (prctl(PR_SET_TAGGED_ADDR_CTRL, PR_TAGGED_ADDR_ENABLE, 0, 0, 0) == 0)
+		tbi_enabled = 1;
+	ptr = (struct utsname *)malloc(sizeof(*ptr));
+	if (tbi_enabled)
+		tag = 0x42;
+	ptr = (struct utsname *)SET_TAG(ptr, tag);
+	err = uname(ptr);
+	free(ptr);
+
+	return err;
+}
-- 
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