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