1821d28b8SMathieu Poirier /* 2821d28b8SMathieu Poirier * Vhost-user RNG virtio device 3821d28b8SMathieu Poirier * 4821d28b8SMathieu Poirier * Copyright (c) 2021 Mathieu Poirier <mathieu.poirier@linaro.org> 5821d28b8SMathieu Poirier * 6233412bfSAlex Bennée * Simple wrapper of the generic vhost-user-device. 7821d28b8SMathieu Poirier * 8821d28b8SMathieu Poirier * SPDX-License-Identifier: GPL-2.0-or-later 9821d28b8SMathieu Poirier */ 10821d28b8SMathieu Poirier 11821d28b8SMathieu Poirier #include "qemu/osdep.h" 12821d28b8SMathieu Poirier #include "qapi/error.h" 13821d28b8SMathieu Poirier #include "hw/qdev-properties.h" 14821d28b8SMathieu Poirier #include "hw/virtio/virtio-bus.h" 15821d28b8SMathieu Poirier #include "hw/virtio/vhost-user-rng.h" 16821d28b8SMathieu Poirier #include "standard-headers/linux/virtio_ids.h" 17821d28b8SMathieu Poirier 18821d28b8SMathieu Poirier static const VMStateDescription vu_rng_vmstate = { 19821d28b8SMathieu Poirier .name = "vhost-user-rng", 20821d28b8SMathieu Poirier .unmigratable = 1, 21821d28b8SMathieu Poirier }; 22821d28b8SMathieu Poirier 23*1577a918SRichard Henderson static const Property vrng_properties[] = { 24233412bfSAlex Bennée DEFINE_PROP_CHR("chardev", VHostUserBase, chardev), 25821d28b8SMathieu Poirier DEFINE_PROP_END_OF_LIST(), 26821d28b8SMathieu Poirier }; 27821d28b8SMathieu Poirier 28233412bfSAlex Bennée static void vu_rng_base_realize(DeviceState *dev, Error **errp) 29233412bfSAlex Bennée { 30233412bfSAlex Bennée VHostUserBase *vub = VHOST_USER_BASE(dev); 31233412bfSAlex Bennée VHostUserBaseClass *vubs = VHOST_USER_BASE_GET_CLASS(dev); 32233412bfSAlex Bennée 33233412bfSAlex Bennée /* Fixed for RNG */ 34233412bfSAlex Bennée vub->virtio_id = VIRTIO_ID_RNG; 35233412bfSAlex Bennée vub->num_vqs = 1; 36233412bfSAlex Bennée vub->vq_size = 4; 37233412bfSAlex Bennée 38233412bfSAlex Bennée vubs->parent_realize(dev, errp); 39233412bfSAlex Bennée } 40233412bfSAlex Bennée 41821d28b8SMathieu Poirier static void vu_rng_class_init(ObjectClass *klass, void *data) 42821d28b8SMathieu Poirier { 43821d28b8SMathieu Poirier DeviceClass *dc = DEVICE_CLASS(klass); 44233412bfSAlex Bennée VHostUserBaseClass *vubc = VHOST_USER_BASE_CLASS(klass); 45821d28b8SMathieu Poirier 46821d28b8SMathieu Poirier dc->vmsd = &vu_rng_vmstate; 47233412bfSAlex Bennée device_class_set_props(dc, vrng_properties); 48233412bfSAlex Bennée device_class_set_parent_realize(dc, vu_rng_base_realize, 49233412bfSAlex Bennée &vubc->parent_realize); 50821d28b8SMathieu Poirier 51233412bfSAlex Bennée set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 52821d28b8SMathieu Poirier } 53821d28b8SMathieu Poirier 54821d28b8SMathieu Poirier static const TypeInfo vu_rng_info = { 55821d28b8SMathieu Poirier .name = TYPE_VHOST_USER_RNG, 56233412bfSAlex Bennée .parent = TYPE_VHOST_USER_BASE, 57821d28b8SMathieu Poirier .instance_size = sizeof(VHostUserRNG), 58821d28b8SMathieu Poirier .class_init = vu_rng_class_init, 59821d28b8SMathieu Poirier }; 60821d28b8SMathieu Poirier 61821d28b8SMathieu Poirier static void vu_rng_register_types(void) 62821d28b8SMathieu Poirier { 63821d28b8SMathieu Poirier type_register_static(&vu_rng_info); 64821d28b8SMathieu Poirier } 65821d28b8SMathieu Poirier 66821d28b8SMathieu Poirier type_init(vu_rng_register_types) 67