1 /* 2 * Generic vhost-user-device implementation for any vhost-user-backend 3 * 4 * This is a concrete implementation of vhost-user-base which can be 5 * configured via properties. It is useful for development and 6 * prototyping. It expects configuration details (if any) to be 7 * handled by the vhost-user daemon itself. 8 * 9 * Copyright (c) 2023 Linaro Ltd 10 * Author: Alex Bennée <alex.bennee@linaro.org> 11 * 12 * SPDX-License-Identifier: GPL-2.0-or-later 13 */ 14 15 #include "qemu/osdep.h" 16 #include "qapi/error.h" 17 #include "hw/qdev-properties.h" 18 #include "hw/virtio/virtio-bus.h" 19 #include "hw/virtio/vhost-user-base.h" 20 #include "qemu/error-report.h" 21 22 /* 23 * The following is a concrete implementation of the base class which 24 * allows the user to define the key parameters via the command line. 25 */ 26 27 static const VMStateDescription vud_vmstate = { 28 .name = "vhost-user-device", 29 .unmigratable = 1, 30 }; 31 32 static const Property vud_properties[] = { 33 DEFINE_PROP_CHR("chardev", VHostUserBase, chardev), 34 DEFINE_PROP_UINT16("virtio-id", VHostUserBase, virtio_id, 0), 35 DEFINE_PROP_UINT32("vq_size", VHostUserBase, vq_size, 64), 36 DEFINE_PROP_UINT32("num_vqs", VHostUserBase, num_vqs, 1), 37 DEFINE_PROP_UINT32("config_size", VHostUserBase, config_size, 0), 38 }; 39 40 static void vud_class_init(ObjectClass *klass, const void *data) 41 { 42 DeviceClass *dc = DEVICE_CLASS(klass); 43 44 /* Reason: stop inexperienced users confusing themselves */ 45 dc->user_creatable = false; 46 47 device_class_set_props(dc, vud_properties); 48 dc->vmsd = &vud_vmstate; 49 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 50 } 51 52 static const TypeInfo vud_info = { 53 .name = TYPE_VHOST_USER_DEVICE, 54 .parent = TYPE_VHOST_USER_BASE, 55 .class_init = vud_class_init, 56 }; 57 58 static void vu_register_types(void) 59 { 60 type_register_static(&vud_info); 61 } 62 63 type_init(vu_register_types) 64