Make the diag288 watchdog useable via tcg as well.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
---
 target/s390x/misc_helper.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target/s390x/misc_helper.c b/target/s390x/misc_helper.c
index 5a1eba02ab..34d730ba73 100644
--- a/target/s390x/misc_helper.c
+++ b/target/s390x/misc_helper.c
@@ -103,6 +103,10 @@ void HELPER(diag)(CPUS390XState *env, uint32_t r1, uint32_t r3, uint32_t num)
         handle_diag_308(env, r1, r3);
         r = 0;
         break;
+    case 0x288:
+        /* time bomb (watchdog) */
+        r = handle_diag_288(env, r1, r3);
+        break;
     default:
         r = -1;
         break;
-- 
2.13.5