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/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 Property vrng_properties[] = { 24 DEFINE_PROP_CHR("chardev", VHostUserBase, chardev), 25 DEFINE_PROP_END_OF_LIST(), 26 }; 27 28 static 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 41 static void vu_rng_class_init(ObjectClass *klass, void *data) 42 { 43 DeviceClass *dc = DEVICE_CLASS(klass); 44 VHostUserBaseClass *vubc = VHOST_USER_BASE_CLASS(klass); 45 46 dc->vmsd = &vu_rng_vmstate; 47 device_class_set_props(dc, vrng_properties); 48 device_class_set_parent_realize(dc, vu_rng_base_realize, 49 &vubc->parent_realize); 50 51 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 52 } 53 54 static const TypeInfo vu_rng_info = { 55 .name = TYPE_VHOST_USER_RNG, 56 .parent = TYPE_VHOST_USER_BASE, 57 .instance_size = sizeof(VHostUserRNG), 58 .class_init = vu_rng_class_init, 59 }; 60 61 static void vu_rng_register_types(void) 62 { 63 type_register_static(&vu_rng_info); 64 } 65 66 type_init(vu_rng_register_types) 67