v4.19.13 snapshot.
diff --git a/arch/sparc/kernel/sun4v_mcd.S b/arch/sparc/kernel/sun4v_mcd.S
new file mode 100644
index 0000000..d6c69eb
--- /dev/null
+++ b/arch/sparc/kernel/sun4v_mcd.S
@@ -0,0 +1,18 @@
+/* sun4v_mcd.S: Sun4v memory corruption detected precise exception handler
+ *
+ * Copyright (c) 2015 Oracle and/or its affiliates. All rights reserved.
+ * Authors: Bob Picco <bob.picco@oracle.com>,
+ * Khalid Aziz <khalid.aziz@oracle.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.
+ */
+ .text
+ .align 32
+
+sun4v_mcd_detect_precise:
+ mov %l4, %o1
+ mov %l5, %o2
+ call sun4v_mem_corrupt_detect_precise
+ add %sp, PTREGS_OFF, %o0
+ ba,a,pt %xcc, rtrap
+ nop