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