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