Subject: [PATCH 3/3] selftest/powerpc: Add slb multihit selftest

From: Ganesh Goudar <[email-masked]>
Date: Wed, 16 Sep 2020 22:52:28 +0530

Add selftest to check if the system recovers from slb multihit
errors.

Signed-off-by: Ganesh Goudar <[email-masked]>
---
 tools/testing/selftests/powerpc/Makefile             | 3 ++-
 tools/testing/selftests/powerpc/mces/Makefile        | 6 ++++++
 tools/testing/selftests/powerpc/mces/slb_multihit.sh | 9 +++++++++
 3 files changed, 17 insertions(+), 1 deletion(-)
 create mode 100644 tools/testing/selftests/powerpc/mces/Makefile
 create mode 100755 tools/testing/selftests/powerpc/mces/slb_multihit.sh

diff --git a/tools/testing/selftests/powerpc/Makefile b/tools/testing/selftests/powerpc/Makefile
index 0830e63818c1..3c900b30da79 100644
--- a/tools/testing/selftests/powerpc/Makefile
+++ b/tools/testing/selftests/powerpc/Makefile
@@ -31,7 +31,8 @@ SUB_DIRS = alignment		\
 	   vphn         \
 	   math		\
 	   ptrace	\
-	   security
+	   security	\
+	   mces
 
 endif
 
diff --git a/tools/testing/selftests/powerpc/mces/Makefile b/tools/testing/selftests/powerpc/mces/Makefile
new file mode 100644
index 000000000000..5a356295e952
--- /dev/null
+++ b/tools/testing/selftests/powerpc/mces/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+# Makefile for machine check exceptions selftests
+
+TEST_PROGS := slb_multihit.sh
+
+include ../../lib.mk
diff --git a/tools/testing/selftests/powerpc/mces/slb_multihit.sh b/tools/testing/selftests/powerpc/mces/slb_multihit.sh
new file mode 100755
index 000000000000..35c17c619d0a
--- /dev/null
+++ b/tools/testing/selftests/powerpc/mces/slb_multihit.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+if [ ! -e "/sys/kernel/debug/powerpc/mce_error_inject/inject_slb_multihit" ] ; then
+        exit 0;
+fi
+
+echo 1 > /sys/kernel/debug/powerpc/mce_error_inject/inject_slb_multihit
+exit 0
-- 
2.26.2