commit 2e17fe7f13225b879358183c509dda5f490dee95
Author: Pino Toscano <ptoscano@redhat.com>
Date:   Thu Nov 16 15:40:44 2017 +0100

    Use sclplmconsole for the second serial on s390x
    
    The default type of serial console is sclp, whose device (sclpconsole)
    can be used at most once.  Hence, use the second type of sclp, sclplm,
    for the second serial console.
    
    Signed-off-by: Pino Toscano <ptoscano@redhat.com>

diff --git oz/Guest.py oz/Guest.py
index 85580d4..e86a39c 100644
--- oz/Guest.py
+++ oz/Guest.py
@@ -419,7 +419,11 @@ class Guest(object):
         oz.ozutil.lxml_subelement(serial, "source", None,
                                   {'mode':'bind', 'host':'127.0.0.1', 'service':str(self.listen_port)})
         oz.ozutil.lxml_subelement(serial, "protocol", None, {'type':'raw'})
-        oz.ozutil.lxml_subelement(serial, "target", None, {'port':'1'})
+        target = oz.ozutil.lxml_subelement(serial, "target", None, {'port':'1'})
+        if self.tdl.arch == 's390x':
+            # use a different console, as sclp can be used as most once
+            target.set('type', 'sclp-serial')
+            oz.ozutil.lxml_subelement(target, "model", None, {'name':'sclplmconsole'})
 
     def _generate_virtio_channel(self, devices, name):
         virtio = oz.ozutil.lxml_subelement(devices, "channel", None, {'type': 'tcp'})