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, 5 insertions, 1 deletions

diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
index e7167e3d05..4e386e9781 100644
--- a/hw/s390x/virtio-ccw.c
+++ b/hw/s390x/virtio-ccw.c
@@ -680,9 +680,13 @@ static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp)
     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
     CcwDevice *ccw_dev = CCW_DEVICE(dev);
     CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev);
-    SubchDev *sch = css_create_virtual_sch(ccw_dev->devno, errp);
+    DeviceState *parent = DEVICE(ccw_dev);
+    BusState *qbus = qdev_get_parent_bus(parent);
+    VirtualCssBus *cbus = VIRTUAL_CSS_BUS(qbus);
+    SubchDev *sch;
     Error *err = NULL;
 
+    sch = css_create_sch(ccw_dev->devno, true, cbus->squash_mcss, errp);
     if (!sch) {
         return;
     }