hw/s390x/vhost-vsock-ccw.c

   1 /*
   2  * vhost vsock ccw implementation
   3  *
   4  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   5  * your option) any later version. See the COPYING file in the top-level
   6  * directory.
   7  */
   8
   9 #include "qemu/osdep.h"
  10 #include "hw/qdev-properties.h"
  11 #include "hw/virtio/virtio.h"
  12 #include "qapi/error.h"
  13 #include "qemu/module.h"
  14 #include "virtio-ccw.h"
  15 #include "hw/virtio/vhost-vsock.h"
  16
  17 #define TYPE_VHOST_VSOCK_CCW "vhost-vsock-ccw"
  18 OBJECT_DECLARE_SIMPLE_TYPE(VHostVSockCCWState, VHOST_VSOCK_CCW)
  19
  20 struct VHostVSockCCWState {
  21     VirtioCcwDevice parent_obj;
  22     VHostVSock vdev;
  23 };
  24
  25 static Property vhost_vsock_ccw_properties[] = {
  26     DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
  27                        VIRTIO_CCW_MAX_REV),
  28     DEFINE_PROP_END_OF_LIST(),
  29 };
  30
  31 static void vhost_vsock_ccw_realize(VirtioCcwDevice *ccw_dev, Error **errp)
  32 {
  33     VHostVSockCCWState *dev = VHOST_VSOCK_CCW(ccw_dev);
  34     DeviceState *vdev = DEVICE(&dev->vdev);
  35
  36     qdev_realize(vdev, BUS(&ccw_dev->bus), errp);
  37 }
  38
  39 static void vhost_vsock_ccw_class_init(ObjectClass *klass, void *data)
  40 {
  41     DeviceClass *dc = DEVICE_CLASS(klass);
  42     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
  43
  44     k->realize = vhost_vsock_ccw_realize;
  45     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
  46     device_class_set_props(dc, vhost_vsock_ccw_properties);
  47 }
  48
  49 static void vhost_vsock_ccw_instance_init(Object *obj)
  50 {
  51     VHostVSockCCWState *dev = VHOST_VSOCK_CCW(obj);
  52     VirtioCcwDevice *ccw_dev = VIRTIO_CCW_DEVICE(obj);
  53     VirtIODevice *virtio_dev;
  54
  55     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  56                                 TYPE_VHOST_VSOCK);
  57
  58     virtio_dev = VIRTIO_DEVICE(&dev->vdev);
  59
  60     /*
  61      * To avoid migration issues, we force virtio version 1 only when
  62      * legacy check is enabled in the new machine types (>= 5.1).
  63      */
  64     if (!virtio_legacy_check_disabled(virtio_dev)) {
  65         ccw_dev->force_revision_1 = true;
  66     }
  67 }
  68
  69 static const TypeInfo vhost_vsock_ccw_info = {
  70     .name          = TYPE_VHOST_VSOCK_CCW,
  71     .parent        = TYPE_VIRTIO_CCW_DEVICE,
  72     .instance_size = sizeof(VHostVSockCCWState),
  73     .instance_init = vhost_vsock_ccw_instance_init,
  74     .class_init    = vhost_vsock_ccw_class_init,
  75 };
  76
  77 static void vhost_vsock_ccw_register(void)
  78 {
  79     type_register_static(&vhost_vsock_ccw_info);
  80 }
  81
  82 type_init(vhost_vsock_ccw_register)