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Merge tag 'pull-maintainer-may24-160524-2' of https://gitlab.com/stsquad/qemu into...
[mirror_qemu.git] / hw / virtio / vhost-user-rng.c
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1/*
2 * Vhost-user RNG virtio device
3 *
4 * Copyright (c) 2021 Mathieu Poirier <mathieu.poirier@linaro.org>
5 *
233412bf 6 * Simple wrapper of the generic vhost-user-device.
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7 *
8 * SPDX-License-Identifier: GPL-2.0-or-later
9 */
10
11#include "qemu/osdep.h"
12#include "qapi/error.h"
13#include "hw/qdev-properties.h"
14#include "hw/virtio/virtio-bus.h"
15#include "hw/virtio/vhost-user-rng.h"
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16#include "standard-headers/linux/virtio_ids.h"
17
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18static const VMStateDescription vu_rng_vmstate = {
19 .name = "vhost-user-rng",
20 .unmigratable = 1,
21};
22
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23static Property vrng_properties[] = {
24 DEFINE_PROP_CHR("chardev", VHostUserBase, chardev),
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25 DEFINE_PROP_END_OF_LIST(),
26};
27
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28static void vu_rng_base_realize(DeviceState *dev, Error **errp)
29{
30 VHostUserBase *vub = VHOST_USER_BASE(dev);
31 VHostUserBaseClass *vubs = VHOST_USER_BASE_GET_CLASS(dev);
32
33 /* Fixed for RNG */
34 vub->virtio_id = VIRTIO_ID_RNG;
35 vub->num_vqs = 1;
36 vub->vq_size = 4;
37
38 vubs->parent_realize(dev, errp);
39}
40
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41static void vu_rng_class_init(ObjectClass *klass, void *data)
42{
43 DeviceClass *dc = DEVICE_CLASS(klass);
233412bf 44 VHostUserBaseClass *vubc = VHOST_USER_BASE_CLASS(klass);
821d28b8 45
821d28b8 46 dc->vmsd = &vu_rng_vmstate;
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47 device_class_set_props(dc, vrng_properties);
48 device_class_set_parent_realize(dc, vu_rng_base_realize,
49 &vubc->parent_realize);
821d28b8 50
233412bf 51 set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
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52}
53
54static const TypeInfo vu_rng_info = {
55 .name = TYPE_VHOST_USER_RNG,
233412bf 56 .parent = TYPE_VHOST_USER_BASE,
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57 .instance_size = sizeof(VHostUserRNG),
58 .class_init = vu_rng_class_init,
59};
60
61static void vu_rng_register_types(void)
62{
63 type_register_static(&vu_rng_info);
64}
65
66type_init(vu_rng_register_types)