tests/migration: Enable the migration test on s390x, too

We can re-use the s390-ccw bios code to implement a small firmware
for a s390x guest which prints out the "A" and "B" characters and
modifies the memory, as required for the migration test.

[quintela: Converted the compile script to Makefile rules]
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1539078677-25396-1-git-send-email-thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
  Fixed up Makefile since the aarch patch sneaked in first

1 files changed, 36 insertions, 0 deletions

diff --git a/tests/migration/s390x/a-b-bios.c b/tests/migration/s390x/a-b-bios.c
new file mode 100644
index 0000000000..a0327cd153
--- /dev/null
+++ b/tests/migration/s390x/a-b-bios.c
@@ -0,0 +1,36 @@
+/*
+ * S390 guest code used in migration tests
+ *
+ * Copyright 2018 Thomas Huth, Red Hat Inc.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#define LOADPARM_LEN 8  /* Needed for sclp.h */
+
+#include <libc.h>
+#include <s390-ccw.h>
+#include <sclp.h>
+
+char stack[0x8000] __attribute__((aligned(4096)));
+
+#define START_ADDRESS  (1024 * 1024)
+#define END_ADDRESS    (100 * 1024 * 1024)
+
+void main(void)
+{
+    unsigned long addr;
+
+    sclp_setup();
+    sclp_print("A");
+
+    while (1) {
+        for (addr = START_ADDRESS; addr < END_ADDRESS; addr += 4096) {
+            *(volatile char *)addr += 1;  /* Change pages */
+        }
+        sclp_print("B");
+    }
+}