s390x/css: realize css_create_sch

The S390 virtual css support already has a mechanism to create a
virtual subchannel and provide it to the guest. However, to
pass-through subchannels to a guest, we need to introduce a new
mechanism to create the subchannel according to the real device
information. Thus we reconstruct css_create_virtual_sch to a new
css_create_sch function to handle all these cases and do allocation
and initialization of the subchannel according to the device type
and machine configuration.

Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Message-Id: <20170517004813.58227-6-bjsdjshi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/hw/s390x/css-bridge.c b/hw/s390x/css-bridge.c
index b54ac01d37..823747fcd7 100644
--- a/hw/s390x/css-bridge.c
+++ b/hw/s390x/css-bridge.c
@@ -17,6 +17,7 @@
 #include "hw/s390x/css.h"
 #include "ccw-device.h"
 #include "hw/s390x/css-bridge.h"
+#include "cpu.h"
 
 /*
  * Invoke device-specific unplug handler, disable the subchannel
@@ -103,6 +104,7 @@ VirtualCssBus *virtual_css_bus_init(void)
     /* Create bus on bridge device */
     bus = qbus_create(TYPE_VIRTUAL_CSS_BUS, dev, "virtual-css");
     cbus = VIRTUAL_CSS_BUS(bus);
+    cbus->squash_mcss = s390_get_squash_mcss();
 
     /* Enable hotplugging */
     qbus_set_hotplug_handler(bus, dev, &error_abort);