hw/arm/raspi: fix CPRMAN base address
[qemu.git] / hw / virtio / vhost-user-vsock.c
1 /*
2 * Vhost-user vsock virtio device
3 *
4 * Copyright 2020 Red Hat, Inc.
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2 or
7 * (at your option) any later version. See the COPYING file in the
8 * top-level directory.
9 */
10
11 #include "qemu/osdep.h"
12
13 #include "qapi/error.h"
14 #include "qemu/error-report.h"
15 #include "hw/qdev-properties.h"
16 #include "hw/virtio/vhost-user-vsock.h"
17
18 static const int user_feature_bits[] = {
19 VIRTIO_F_VERSION_1,
20 VIRTIO_RING_F_INDIRECT_DESC,
21 VIRTIO_RING_F_EVENT_IDX,
22 VIRTIO_F_NOTIFY_ON_EMPTY,
23 VHOST_INVALID_FEATURE_BIT
24 };
25
26 static void vuv_get_config(VirtIODevice *vdev, uint8_t *config)
27 {
28 VHostUserVSock *vsock = VHOST_USER_VSOCK(vdev);
29
30 memcpy(config, &vsock->vsockcfg, sizeof(struct virtio_vsock_config));
31 }
32
33 static int vuv_handle_config_change(struct vhost_dev *dev)
34 {
35 VHostUserVSock *vsock = VHOST_USER_VSOCK(dev->vdev);
36 int ret = vhost_dev_get_config(dev, (uint8_t *)&vsock->vsockcfg,
37 sizeof(struct virtio_vsock_config));
38 if (ret < 0) {
39 error_report("get config space failed");
40 return -1;
41 }
42
43 virtio_notify_config(dev->vdev);
44
45 return 0;
46 }
47
48 const VhostDevConfigOps vsock_ops = {
49 .vhost_dev_config_notifier = vuv_handle_config_change,
50 };
51
52 static void vuv_set_status(VirtIODevice *vdev, uint8_t status)
53 {
54 VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(vdev);
55 bool should_start = status & VIRTIO_CONFIG_S_DRIVER_OK;
56
57 if (!vdev->vm_running) {
58 should_start = false;
59 }
60
61 if (vvc->vhost_dev.started == should_start) {
62 return;
63 }
64
65 if (should_start) {
66 int ret = vhost_vsock_common_start(vdev);
67 if (ret < 0) {
68 return;
69 }
70 } else {
71 vhost_vsock_common_stop(vdev);
72 }
73 }
74
75 static uint64_t vuv_get_features(VirtIODevice *vdev,
76 uint64_t features,
77 Error **errp)
78 {
79 VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(vdev);
80
81 return vhost_get_features(&vvc->vhost_dev, user_feature_bits, features);
82 }
83
84 static const VMStateDescription vuv_vmstate = {
85 .name = "vhost-user-vsock",
86 .unmigratable = 1,
87 };
88
89 static void vuv_device_realize(DeviceState *dev, Error **errp)
90 {
91 VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(dev);
92 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
93 VHostUserVSock *vsock = VHOST_USER_VSOCK(dev);
94 int ret;
95
96 if (!vsock->conf.chardev.chr) {
97 error_setg(errp, "missing chardev");
98 return;
99 }
100
101 if (!vhost_user_init(&vsock->vhost_user, &vsock->conf.chardev, errp)) {
102 return;
103 }
104
105 vhost_vsock_common_realize(vdev, "vhost-user-vsock");
106
107 vhost_dev_set_config_notifier(&vvc->vhost_dev, &vsock_ops);
108
109 ret = vhost_dev_init(&vvc->vhost_dev, &vsock->vhost_user,
110 VHOST_BACKEND_TYPE_USER, 0);
111 if (ret < 0) {
112 error_setg_errno(errp, -ret, "vhost_dev_init failed");
113 goto err_virtio;
114 }
115
116 ret = vhost_dev_get_config(&vvc->vhost_dev, (uint8_t *)&vsock->vsockcfg,
117 sizeof(struct virtio_vsock_config));
118 if (ret < 0) {
119 error_setg_errno(errp, -ret, "get config space failed");
120 goto err_vhost_dev;
121 }
122
123 return;
124
125 err_vhost_dev:
126 vhost_dev_cleanup(&vvc->vhost_dev);
127 err_virtio:
128 vhost_vsock_common_unrealize(vdev);
129 vhost_user_cleanup(&vsock->vhost_user);
130 return;
131 }
132
133 static void vuv_device_unrealize(DeviceState *dev)
134 {
135 VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(dev);
136 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
137 VHostUserVSock *vsock = VHOST_USER_VSOCK(dev);
138
139 /* This will stop vhost backend if appropriate. */
140 vuv_set_status(vdev, 0);
141
142 vhost_dev_cleanup(&vvc->vhost_dev);
143
144 vhost_vsock_common_unrealize(vdev);
145
146 vhost_user_cleanup(&vsock->vhost_user);
147
148 }
149
150 static Property vuv_properties[] = {
151 DEFINE_PROP_CHR("chardev", VHostUserVSock, conf.chardev),
152 DEFINE_PROP_END_OF_LIST(),
153 };
154
155 static void vuv_class_init(ObjectClass *klass, void *data)
156 {
157 DeviceClass *dc = DEVICE_CLASS(klass);
158 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
159
160 device_class_set_props(dc, vuv_properties);
161 dc->vmsd = &vuv_vmstate;
162 vdc->realize = vuv_device_realize;
163 vdc->unrealize = vuv_device_unrealize;
164 vdc->get_features = vuv_get_features;
165 vdc->get_config = vuv_get_config;
166 vdc->set_status = vuv_set_status;
167 }
168
169 static const TypeInfo vuv_info = {
170 .name = TYPE_VHOST_USER_VSOCK,
171 .parent = TYPE_VHOST_VSOCK_COMMON,
172 .instance_size = sizeof(VHostUserVSock),
173 .class_init = vuv_class_init,
174 };
175
176 static void vuv_register_types(void)
177 {
178 type_register_static(&vuv_info);
179 }
180
181 type_init(vuv_register_types)