hw/s390x/virtio-ccw-rng.c

   1 /*
   2  * virtio ccw random number generator implementation
   3  *
   4  * Copyright 2012, 2015 IBM Corp.
   5  * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   8  * your option) any later version. See the COPYING file in the top-level
   9  * directory.
  10  */
  11
  12 #include "qemu/osdep.h"
  13 #include "hw/qdev-properties.h"
  14 #include "hw/virtio/virtio.h"
  15 #include "qapi/error.h"
  16 #include "qemu/module.h"
  17 #include "virtio-ccw.h"
  18
  19 static void virtio_ccw_rng_realize(VirtioCcwDevice *ccw_dev, Error **errp)
  20 {
  21     VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev);
  22     DeviceState *vdev = DEVICE(&dev->vdev);
  23     Error *err = NULL;
  24
  25     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
  26     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
  27     if (err) {
  28         error_propagate(errp, err);
  29         return;
  30     }
  31
  32     object_property_set_link(OBJECT(dev),
  33                              OBJECT(dev->vdev.conf.rng), "rng",
  34                              NULL);
  35 }
  36
  37 static void virtio_ccw_rng_instance_init(Object *obj)
  38 {
  39     VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj);
  40
  41     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  42                                 TYPE_VIRTIO_RNG);
  43 }
  44
  45 static Property virtio_ccw_rng_properties[] = {
  46     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
  47                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
  48     DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
  49                        VIRTIO_CCW_MAX_REV),
  50     DEFINE_PROP_END_OF_LIST(),
  51 };
  52
  53 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data)
  54 {
  55     DeviceClass *dc = DEVICE_CLASS(klass);
  56     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
  57
  58     k->realize = virtio_ccw_rng_realize;
  59     dc->props = virtio_ccw_rng_properties;
  60     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
  61 }
  62
  63 static const TypeInfo virtio_ccw_rng = {
  64     .name          = TYPE_VIRTIO_RNG_CCW,
  65     .parent        = TYPE_VIRTIO_CCW_DEVICE,
  66     .instance_size = sizeof(VirtIORNGCcw),
  67     .instance_init = virtio_ccw_rng_instance_init,
  68     .class_init    = virtio_ccw_rng_class_init,
  69 };
  70
  71 static void virtio_ccw_rng_register(void)
  72 {
  73     type_register_static(&virtio_ccw_rng);
  74 }
  75
  76 type_init(virtio_ccw_rng_register)