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967f97fa AL |
1 | /* |
2 | * Virtio Support | |
3 | * | |
4 | * Copyright IBM, Corp. 2007 | |
5 | * | |
6 | * Authors: | |
7 | * Anthony Liguori <aliguori@us.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
10 | * the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
2a6a4076 MA |
14 | #ifndef QEMU_VIRTIO_H |
15 | #define QEMU_VIRTIO_H | |
967f97fa | 16 | |
d4842052 | 17 | #include "exec/memory.h" |
a27bd6c7 | 18 | #include "hw/qdev-core.h" |
1422e32d | 19 | #include "net/net.h" |
d6454270 | 20 | #include "migration/vmstate.h" |
1de7afc9 | 21 | #include "qemu/event_notifier.h" |
e9600c6c MT |
22 | #include "standard-headers/linux/virtio_config.h" |
23 | #include "standard-headers/linux/virtio_ring.h" | |
db1015e9 | 24 | #include "qom/object.h" |
967f97fa | 25 | |
8eca6b1b AL |
26 | /* A guest should never accept this. It implies negotiation is broken. */ |
27 | #define VIRTIO_F_BAD_FEATURE 30 | |
967f97fa | 28 | |
5f456073 MT |
29 | #define VIRTIO_LEGACY_FEATURES ((0x1ULL << VIRTIO_F_BAD_FEATURE) | \ |
30 | (0x1ULL << VIRTIO_F_NOTIFY_ON_EMPTY) | \ | |
31 | (0x1ULL << VIRTIO_F_ANY_LAYOUT)) | |
32 | ||
967f97fa AL |
33 | struct VirtQueue; |
34 | ||
a8170e5e | 35 | static inline hwaddr vring_align(hwaddr addr, |
f46f15bc AL |
36 | unsigned long align) |
37 | { | |
b8adbc65 | 38 | return QEMU_ALIGN_UP(addr, align); |
f46f15bc AL |
39 | } |
40 | ||
ba550851 SG |
41 | typedef struct VirtIOFeature { |
42 | uint64_t flags; | |
43 | size_t end; | |
44 | } VirtIOFeature; | |
45 | ||
46 | size_t virtio_feature_get_config_size(VirtIOFeature *features, | |
47 | uint64_t host_features); | |
48 | ||
967f97fa | 49 | typedef struct VirtQueue VirtQueue; |
967f97fa AL |
50 | |
51 | #define VIRTQUEUE_MAX_SIZE 1024 | |
52 | ||
53 | typedef struct VirtQueueElement | |
54 | { | |
55 | unsigned int index; | |
86044b24 JW |
56 | unsigned int len; |
57 | unsigned int ndescs; | |
967f97fa AL |
58 | unsigned int out_num; |
59 | unsigned int in_num; | |
3724650d PB |
60 | hwaddr *in_addr; |
61 | hwaddr *out_addr; | |
62 | struct iovec *in_sg; | |
63 | struct iovec *out_sg; | |
967f97fa AL |
64 | } VirtQueueElement; |
65 | ||
b829c2a9 | 66 | #define VIRTIO_QUEUE_MAX 1024 |
967f97fa | 67 | |
7055e687 MT |
68 | #define VIRTIO_NO_VECTOR 0xffff |
69 | ||
8e05db92 | 70 | #define TYPE_VIRTIO_DEVICE "virtio-device" |
a489d195 | 71 | OBJECT_DECLARE_TYPE(VirtIODevice, VirtioDeviceClass, VIRTIO_DEVICE) |
8e05db92 | 72 | |
616a6552 GK |
73 | enum virtio_device_endian { |
74 | VIRTIO_DEVICE_ENDIAN_UNKNOWN, | |
75 | VIRTIO_DEVICE_ENDIAN_LITTLE, | |
76 | VIRTIO_DEVICE_ENDIAN_BIG, | |
77 | }; | |
78 | ||
967f97fa AL |
79 | struct VirtIODevice |
80 | { | |
8e05db92 | 81 | DeviceState parent_obj; |
967f97fa | 82 | const char *name; |
967f97fa AL |
83 | uint8_t status; |
84 | uint8_t isr; | |
85 | uint16_t queue_sel; | |
019a3edb GH |
86 | uint64_t guest_features; |
87 | uint64_t host_features; | |
75ebec11 | 88 | uint64_t backend_features; |
967f97fa AL |
89 | size_t config_len; |
90 | void *config; | |
7055e687 | 91 | uint16_t config_vector; |
b8f05908 | 92 | uint32_t generation; |
7055e687 | 93 | int nvectors; |
967f97fa | 94 | VirtQueue *vq; |
c611c764 | 95 | MemoryListener listener; |
53c25cea | 96 | uint16_t device_id; |
85cf2a8d | 97 | bool vm_running; |
f5ed3663 | 98 | bool broken; /* device in invalid state, needs reset */ |
9d7bd082 MR |
99 | bool use_disabled_flag; /* allow use of 'disable' flag when needed */ |
100 | bool disabled; /* device in temporarily disabled state */ | |
e57f2c31 | 101 | bool use_started; |
badaf79c | 102 | bool started; |
7abccd08 | 103 | bool start_on_kick; /* when virtio 1.0 feature has not been negotiated */ |
85cf2a8d | 104 | VMChangeStateEntry *vmstate; |
1034e9cf | 105 | char *bus_name; |
616a6552 | 106 | uint8_t device_endian; |
5669655a | 107 | bool use_guest_notifier_mask; |
8607f5c3 | 108 | AddressSpace *dma_as; |
850d0070 | 109 | QLIST_HEAD(, VirtQueue) *vector_queues; |
967f97fa AL |
110 | }; |
111 | ||
db1015e9 | 112 | struct VirtioDeviceClass { |
0ba94b6f | 113 | /*< private >*/ |
8e05db92 | 114 | DeviceClass parent; |
0ba94b6f | 115 | /*< public >*/ |
1d244b42 AF |
116 | |
117 | /* This is what a VirtioDevice must implement */ | |
1d244b42 | 118 | DeviceRealize realize; |
306ec6c3 | 119 | DeviceUnrealize unrealize; |
9d5b731d JW |
120 | uint64_t (*get_features)(VirtIODevice *vdev, |
121 | uint64_t requested_features, | |
122 | Error **errp); | |
019a3edb | 123 | uint64_t (*bad_features)(VirtIODevice *vdev); |
d5aaa1b0 | 124 | void (*set_features)(VirtIODevice *vdev, uint64_t val); |
0b352fd6 | 125 | int (*validate_features)(VirtIODevice *vdev); |
8e05db92 FK |
126 | void (*get_config)(VirtIODevice *vdev, uint8_t *config); |
127 | void (*set_config)(VirtIODevice *vdev, const uint8_t *config); | |
128 | void (*reset)(VirtIODevice *vdev); | |
129 | void (*set_status)(VirtIODevice *vdev, uint8_t val); | |
9b706dbb MT |
130 | /* For transitional devices, this is a bitmap of features |
131 | * that are only exposed on the legacy interface but not | |
132 | * the modern one. | |
133 | */ | |
134 | uint64_t legacy_features; | |
6a87acf7 FK |
135 | /* Test and clear event pending status. |
136 | * Should be called after unmask to avoid losing events. | |
137 | * If backend does not support masking, | |
138 | * must check in frontend instead. | |
139 | */ | |
140 | bool (*guest_notifier_pending)(VirtIODevice *vdev, int n); | |
141 | /* Mask/unmask events from this vq. Any events reported | |
142 | * while masked will become pending. | |
143 | * If backend does not support masking, | |
144 | * must mask in frontend instead. | |
145 | */ | |
146 | void (*guest_notifier_mask)(VirtIODevice *vdev, int n, bool mask); | |
ff4c07df PB |
147 | int (*start_ioeventfd)(VirtIODevice *vdev); |
148 | void (*stop_ioeventfd)(VirtIODevice *vdev); | |
ea43e259 DDAG |
149 | /* Saving and loading of a device; trying to deprecate save/load |
150 | * use vmsd for new devices. | |
151 | */ | |
1b5fc0de GK |
152 | void (*save)(VirtIODevice *vdev, QEMUFile *f); |
153 | int (*load)(VirtIODevice *vdev, QEMUFile *f, int version_id); | |
1dd71383 MT |
154 | /* Post load hook in vmsd is called early while device is processed, and |
155 | * when VirtIODevice isn't fully initialized. Devices should use this instead, | |
156 | * unless they specifically want to verify the migration stream as it's | |
157 | * processed, e.g. for bounds checking. | |
158 | */ | |
159 | int (*post_load)(VirtIODevice *vdev); | |
ea43e259 | 160 | const VMStateDescription *vmsd; |
9711cd0d | 161 | bool (*primary_unplug_pending)(void *opaque); |
db1015e9 | 162 | }; |
8e05db92 | 163 | |
c8075caf GA |
164 | void virtio_instance_init_common(Object *proxy_obj, void *data, |
165 | size_t vdev_size, const char *vdev_name); | |
166 | ||
8e05db92 FK |
167 | void virtio_init(VirtIODevice *vdev, const char *name, |
168 | uint16_t device_id, size_t config_size); | |
6a1a8cc7 | 169 | void virtio_cleanup(VirtIODevice *vdev); |
8e05db92 | 170 | |
f5ed3663 SH |
171 | void virtio_error(VirtIODevice *vdev, const char *fmt, ...) GCC_FMT_ATTR(2, 3); |
172 | ||
1034e9cf FK |
173 | /* Set the child bus name. */ |
174 | void virtio_device_set_child_bus_name(VirtIODevice *vdev, char *bus_name); | |
175 | ||
bf1780b0 | 176 | typedef void (*VirtIOHandleOutput)(VirtIODevice *, VirtQueue *); |
07931698 | 177 | typedef bool (*VirtIOHandleAIOOutput)(VirtIODevice *, VirtQueue *); |
bf1780b0 | 178 | |
967f97fa | 179 | VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size, |
bf1780b0 | 180 | VirtIOHandleOutput handle_output); |
967f97fa | 181 | |
f23fd811 JW |
182 | void virtio_del_queue(VirtIODevice *vdev, int n); |
183 | ||
722f8c51 MT |
184 | void virtio_delete_queue(VirtQueue *vq); |
185 | ||
967f97fa AL |
186 | void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem, |
187 | unsigned int len); | |
188 | void virtqueue_flush(VirtQueue *vq, unsigned int count); | |
2640d2a5 SH |
189 | void virtqueue_detach_element(VirtQueue *vq, const VirtQueueElement *elem, |
190 | unsigned int len); | |
27e57efe LP |
191 | void virtqueue_unpop(VirtQueue *vq, const VirtQueueElement *elem, |
192 | unsigned int len); | |
297a75e6 | 193 | bool virtqueue_rewind(VirtQueue *vq, unsigned int num); |
967f97fa AL |
194 | void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem, |
195 | unsigned int len, unsigned int idx); | |
196 | ||
8607f5c3 | 197 | void virtqueue_map(VirtIODevice *vdev, VirtQueueElement *elem); |
51b19ebe | 198 | void *virtqueue_pop(VirtQueue *vq, size_t sz); |
54e17709 | 199 | unsigned int virtqueue_drop_all(VirtQueue *vq); |
8607f5c3 | 200 | void *qemu_get_virtqueue_element(VirtIODevice *vdev, QEMUFile *f, size_t sz); |
86044b24 JW |
201 | void qemu_put_virtqueue_element(VirtIODevice *vdev, QEMUFile *f, |
202 | VirtQueueElement *elem); | |
0d8d7690 AS |
203 | int virtqueue_avail_bytes(VirtQueue *vq, unsigned int in_bytes, |
204 | unsigned int out_bytes); | |
205 | void virtqueue_get_avail_bytes(VirtQueue *vq, unsigned int *in_bytes, | |
e1f7b481 MT |
206 | unsigned int *out_bytes, |
207 | unsigned max_in_bytes, unsigned max_out_bytes); | |
967f97fa | 208 | |
83d768b5 | 209 | void virtio_notify_irqfd(VirtIODevice *vdev, VirtQueue *vq); |
967f97fa AL |
210 | void virtio_notify(VirtIODevice *vdev, VirtQueue *vq); |
211 | ||
2f168d07 | 212 | int virtio_save(VirtIODevice *vdev, QEMUFile *f); |
5943124c | 213 | |
1a665855 HP |
214 | extern const VMStateInfo virtio_vmstate_info; |
215 | ||
1a665855 HP |
216 | #define VMSTATE_VIRTIO_DEVICE \ |
217 | { \ | |
218 | .name = "virtio", \ | |
219 | .info = &virtio_vmstate_info, \ | |
220 | .flags = VMS_SINGLE, \ | |
221 | } | |
222 | ||
1b5fc0de | 223 | int virtio_load(VirtIODevice *vdev, QEMUFile *f, int version_id); |
967f97fa AL |
224 | |
225 | void virtio_notify_config(VirtIODevice *vdev); | |
226 | ||
d0435bc5 | 227 | bool virtio_queue_get_notification(VirtQueue *vq); |
967f97fa AL |
228 | void virtio_queue_set_notification(VirtQueue *vq, int enable); |
229 | ||
230 | int virtio_queue_ready(VirtQueue *vq); | |
231 | ||
232 | int virtio_queue_empty(VirtQueue *vq); | |
233 | ||
53c25cea PB |
234 | /* Host binding interface. */ |
235 | ||
53c25cea PB |
236 | uint32_t virtio_config_readb(VirtIODevice *vdev, uint32_t addr); |
237 | uint32_t virtio_config_readw(VirtIODevice *vdev, uint32_t addr); | |
238 | uint32_t virtio_config_readl(VirtIODevice *vdev, uint32_t addr); | |
239 | void virtio_config_writeb(VirtIODevice *vdev, uint32_t addr, uint32_t data); | |
240 | void virtio_config_writew(VirtIODevice *vdev, uint32_t addr, uint32_t data); | |
241 | void virtio_config_writel(VirtIODevice *vdev, uint32_t addr, uint32_t data); | |
adfb743c MT |
242 | uint32_t virtio_config_modern_readb(VirtIODevice *vdev, uint32_t addr); |
243 | uint32_t virtio_config_modern_readw(VirtIODevice *vdev, uint32_t addr); | |
244 | uint32_t virtio_config_modern_readl(VirtIODevice *vdev, uint32_t addr); | |
245 | void virtio_config_modern_writeb(VirtIODevice *vdev, | |
246 | uint32_t addr, uint32_t data); | |
247 | void virtio_config_modern_writew(VirtIODevice *vdev, | |
248 | uint32_t addr, uint32_t data); | |
249 | void virtio_config_modern_writel(VirtIODevice *vdev, | |
250 | uint32_t addr, uint32_t data); | |
a8170e5e AK |
251 | void virtio_queue_set_addr(VirtIODevice *vdev, int n, hwaddr addr); |
252 | hwaddr virtio_queue_get_addr(VirtIODevice *vdev, int n); | |
e63c0ba1 | 253 | void virtio_queue_set_num(VirtIODevice *vdev, int n, int num); |
53c25cea | 254 | int virtio_queue_get_num(VirtIODevice *vdev, int n); |
8c797e75 | 255 | int virtio_queue_get_max_num(VirtIODevice *vdev, int n); |
8ad176aa | 256 | int virtio_get_num_queues(VirtIODevice *vdev); |
ab223c95 CH |
257 | void virtio_queue_set_rings(VirtIODevice *vdev, int n, hwaddr desc, |
258 | hwaddr avail, hwaddr used); | |
259 | void virtio_queue_update_rings(VirtIODevice *vdev, int n); | |
6ce69d1c | 260 | void virtio_queue_set_align(VirtIODevice *vdev, int n, int align); |
53c25cea | 261 | void virtio_queue_notify(VirtIODevice *vdev, int n); |
7055e687 MT |
262 | uint16_t virtio_queue_vector(VirtIODevice *vdev, int n); |
263 | void virtio_queue_set_vector(VirtIODevice *vdev, int n, uint16_t vector); | |
6f80e617 TB |
264 | int virtio_queue_set_host_notifier_mr(VirtIODevice *vdev, int n, |
265 | MemoryRegion *mr, bool assign); | |
0b352fd6 | 266 | int virtio_set_status(VirtIODevice *vdev, uint8_t val); |
53c25cea PB |
267 | void virtio_reset(void *opaque); |
268 | void virtio_update_irq(VirtIODevice *vdev); | |
d5aaa1b0 | 269 | int virtio_set_features(VirtIODevice *vdev, uint64_t val); |
53c25cea | 270 | |
53c25cea | 271 | /* Base devices. */ |
12c5674b | 272 | typedef struct VirtIOBlkConf VirtIOBlkConf; |
f0c07c7c | 273 | struct virtio_net_conf; |
6b331efb | 274 | typedef struct virtio_serial_conf virtio_serial_conf; |
f73ddbad | 275 | typedef struct virtio_input_conf virtio_input_conf; |
973abc7f | 276 | typedef struct VirtIOSCSIConf VirtIOSCSIConf; |
16c915ba | 277 | typedef struct VirtIORNGConf VirtIORNGConf; |
97b15621 | 278 | |
8172539d | 279 | #define DEFINE_VIRTIO_COMMON_FEATURES(_state, _field) \ |
019a3edb GH |
280 | DEFINE_PROP_BIT64("indirect_desc", _state, _field, \ |
281 | VIRTIO_RING_F_INDIRECT_DESC, true), \ | |
282 | DEFINE_PROP_BIT64("event_idx", _state, _field, \ | |
283 | VIRTIO_RING_F_EVENT_IDX, true), \ | |
284 | DEFINE_PROP_BIT64("notify_on_empty", _state, _field, \ | |
09999a5f MT |
285 | VIRTIO_F_NOTIFY_ON_EMPTY, true), \ |
286 | DEFINE_PROP_BIT64("any_layout", _state, _field, \ | |
8607f5c3 JW |
287 | VIRTIO_F_ANY_LAYOUT, true), \ |
288 | DEFINE_PROP_BIT64("iommu_platform", _state, _field, \ | |
74b3e466 JW |
289 | VIRTIO_F_IOMMU_PLATFORM, false), \ |
290 | DEFINE_PROP_BIT64("packed", _state, _field, \ | |
291 | VIRTIO_F_RING_PACKED, false) | |
8172539d | 292 | |
a8170e5e | 293 | hwaddr virtio_queue_get_desc_addr(VirtIODevice *vdev, int n); |
0c9753eb | 294 | bool virtio_queue_enabled_legacy(VirtIODevice *vdev, int n); |
23bfaf77 | 295 | bool virtio_queue_enabled(VirtIODevice *vdev, int n); |
a8170e5e AK |
296 | hwaddr virtio_queue_get_avail_addr(VirtIODevice *vdev, int n); |
297 | hwaddr virtio_queue_get_used_addr(VirtIODevice *vdev, int n); | |
a8170e5e AK |
298 | hwaddr virtio_queue_get_desc_size(VirtIODevice *vdev, int n); |
299 | hwaddr virtio_queue_get_avail_size(VirtIODevice *vdev, int n); | |
300 | hwaddr virtio_queue_get_used_size(VirtIODevice *vdev, int n); | |
86044b24 JW |
301 | unsigned int virtio_queue_get_last_avail_idx(VirtIODevice *vdev, int n); |
302 | void virtio_queue_set_last_avail_idx(VirtIODevice *vdev, int n, | |
303 | unsigned int idx); | |
2d4ba6cc | 304 | void virtio_queue_restore_last_avail_idx(VirtIODevice *vdev, int n); |
6793dfd1 | 305 | void virtio_queue_invalidate_signalled_used(VirtIODevice *vdev, int n); |
312d3b35 | 306 | void virtio_queue_update_used_idx(VirtIODevice *vdev, int n); |
1cbdabe2 | 307 | VirtQueue *virtio_get_queue(VirtIODevice *vdev, int n); |
e78a2b42 | 308 | uint16_t virtio_get_queue_index(VirtQueue *vq); |
1cbdabe2 | 309 | EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq); |
15b2bd18 PB |
310 | void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign, |
311 | bool with_irqfd); | |
ff4c07df | 312 | int virtio_device_start_ioeventfd(VirtIODevice *vdev); |
310837de PB |
313 | int virtio_device_grab_ioeventfd(VirtIODevice *vdev); |
314 | void virtio_device_release_ioeventfd(VirtIODevice *vdev); | |
8e93cef1 | 315 | bool virtio_device_ioeventfd_enabled(VirtIODevice *vdev); |
1cbdabe2 | 316 | EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq); |
fcccb271 | 317 | void virtio_queue_set_host_notifier_enabled(VirtQueue *vq, bool enabled); |
fa283a4a | 318 | void virtio_queue_host_notifier_read(EventNotifier *n); |
a1afb606 | 319 | void virtio_queue_aio_set_host_notifier_handler(VirtQueue *vq, AioContext *ctx, |
07931698 | 320 | VirtIOHandleAIOOutput handle_output); |
e0d686bf JW |
321 | VirtQueue *virtio_vector_first_queue(VirtIODevice *vdev, uint16_t vector); |
322 | VirtQueue *virtio_vector_next_queue(VirtQueue *vq); | |
98ed8ecf | 323 | |
019a3edb | 324 | static inline void virtio_add_feature(uint64_t *features, unsigned int fbit) |
0cd09c3a | 325 | { |
019a3edb | 326 | assert(fbit < 64); |
d5aaa1b0 | 327 | *features |= (1ULL << fbit); |
0cd09c3a CH |
328 | } |
329 | ||
019a3edb | 330 | static inline void virtio_clear_feature(uint64_t *features, unsigned int fbit) |
0cd09c3a | 331 | { |
019a3edb | 332 | assert(fbit < 64); |
d5aaa1b0 | 333 | *features &= ~(1ULL << fbit); |
0cd09c3a CH |
334 | } |
335 | ||
95129d6f | 336 | static inline bool virtio_has_feature(uint64_t features, unsigned int fbit) |
ef546f12 | 337 | { |
019a3edb | 338 | assert(fbit < 64); |
d5aaa1b0 | 339 | return !!(features & (1ULL << fbit)); |
ef546f12 CH |
340 | } |
341 | ||
95129d6f CH |
342 | static inline bool virtio_vdev_has_feature(VirtIODevice *vdev, |
343 | unsigned int fbit) | |
ef546f12 | 344 | { |
95129d6f | 345 | return virtio_has_feature(vdev->guest_features, fbit); |
ef546f12 CH |
346 | } |
347 | ||
74aae7b2 JW |
348 | static inline bool virtio_host_has_feature(VirtIODevice *vdev, |
349 | unsigned int fbit) | |
350 | { | |
95129d6f | 351 | return virtio_has_feature(vdev->host_features, fbit); |
74aae7b2 JW |
352 | } |
353 | ||
616a6552 | 354 | static inline bool virtio_is_big_endian(VirtIODevice *vdev) |
98ed8ecf | 355 | { |
95129d6f | 356 | if (!virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1)) { |
3c185597 CH |
357 | assert(vdev->device_endian != VIRTIO_DEVICE_ENDIAN_UNKNOWN); |
358 | return vdev->device_endian == VIRTIO_DEVICE_ENDIAN_BIG; | |
359 | } | |
360 | /* Devices conforming to VIRTIO 1.0 or later are always LE. */ | |
361 | return false; | |
98ed8ecf | 362 | } |
e57f2c31 XY |
363 | |
364 | static inline bool virtio_device_started(VirtIODevice *vdev, uint8_t status) | |
365 | { | |
366 | if (vdev->use_started) { | |
367 | return vdev->started; | |
368 | } | |
369 | ||
370 | return status & VIRTIO_CONFIG_S_DRIVER_OK; | |
371 | } | |
372 | ||
373 | static inline void virtio_set_started(VirtIODevice *vdev, bool started) | |
374 | { | |
375 | if (started) { | |
376 | vdev->start_on_kick = false; | |
377 | } | |
378 | ||
379 | if (vdev->use_started) { | |
380 | vdev->started = started; | |
381 | } | |
382 | } | |
9d7bd082 MR |
383 | |
384 | static inline void virtio_set_disabled(VirtIODevice *vdev, bool disable) | |
385 | { | |
386 | if (vdev->use_disabled_flag) { | |
387 | vdev->disabled = disable; | |
388 | } | |
389 | } | |
390 | ||
391 | static inline bool virtio_device_disabled(VirtIODevice *vdev) | |
392 | { | |
393 | return unlikely(vdev->disabled || vdev->broken); | |
394 | } | |
395 | ||
7c78bdd7 CH |
396 | bool virtio_legacy_allowed(VirtIODevice *vdev); |
397 | ||
967f97fa | 398 | #endif |