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/virtio/virtio.h"
  14 #include "qapi/error.h"
  15 #include "virtio-ccw.h"
  16
  17 static void virtio_ccw_rng_realize(VirtioCcwDevice *ccw_dev, Error **errp)
  18 {
  19     VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev);
  20     DeviceState *vdev = DEVICE(&dev->vdev);
  21     Error *err = NULL;
  22
  23     qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
  24     object_property_set_bool(OBJECT(vdev), true, "realized", &err);
  25     if (err) {
  26         error_propagate(errp, err);
  27         return;
  28     }
  29
  30     object_property_set_link(OBJECT(dev),
  31                              OBJECT(dev->vdev.conf.rng), "rng",
  32                              NULL);
  33 }
  34
  35 static void virtio_ccw_rng_instance_init(Object *obj)
  36 {
  37     VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj);
  38
  39     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  40                                 TYPE_VIRTIO_RNG);
  41 }
  42
  43 static Property virtio_ccw_rng_properties[] = {
  44     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
  45                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
  46     DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
  47                        VIRTIO_CCW_MAX_REV),
  48     DEFINE_PROP_END_OF_LIST(),
  49 };
  50
  51 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data)
  52 {
  53     DeviceClass *dc = DEVICE_CLASS(klass);
  54     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
  55
  56     k->realize = virtio_ccw_rng_realize;
  57     dc->props = virtio_ccw_rng_properties;
  58     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
  59 }
  60
  61 static const TypeInfo virtio_ccw_rng = {
  62     .name          = TYPE_VIRTIO_RNG_CCW,
  63     .parent        = TYPE_VIRTIO_CCW_DEVICE,
  64     .instance_size = sizeof(VirtIORNGCcw),
  65     .instance_init = virtio_ccw_rng_instance_init,
  66     .class_init    = virtio_ccw_rng_class_init,
  67 };
  68
  69 static void virtio_ccw_rng_register(void)
  70 {
  71     type_register_static(&virtio_ccw_rng);
  72 }
  73
  74 type_init(virtio_ccw_rng_register)