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virtio: split vhost user blk bits from virtio-pci
[qemu/kevin.git] / hw / virtio / virtio-pci.c
blob44cc022a289bd40159b0631a54eb5f4459dd249e
1 /*
2 * Virtio PCI Bindings
3 *
4 * Copyright IBM, Corp. 2007
5 * Copyright (c) 2009 CodeSourcery
6 *
7 * Authors:
8 * Anthony Liguori <aliguori@us.ibm.com>
9 * Paul Brook <paul@codesourcery.com>
10 *
11 * This work is licensed under the terms of the GNU GPL, version 2. See
12 * the COPYING file in the top-level directory.
13 *
14 * Contributions after 2012-01-13 are licensed under the terms of the
15 * GNU GPL, version 2 or (at your option) any later version.
16 */
17
18 #include "qemu/osdep.h"
19
20 #include "standard-headers/linux/virtio_pci.h"
21 #include "hw/virtio/virtio.h"
22 #include "hw/virtio/virtio-blk.h"
23 #include "hw/virtio/virtio-net.h"
24 #include "hw/virtio/virtio-serial.h"
25 #include "hw/virtio/virtio-scsi.h"
26 #include "hw/pci/pci.h"
27 #include "qapi/error.h"
28 #include "qemu/error-report.h"
29 #include "hw/pci/msi.h"
30 #include "hw/pci/msix.h"
31 #include "hw/loader.h"
32 #include "sysemu/kvm.h"
33 #include "virtio-pci.h"
34 #include "qemu/range.h"
35 #include "hw/virtio/virtio-bus.h"
36 #include "qapi/visitor.h"
37
38 #define VIRTIO_PCI_REGION_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_present(dev))
39
40 #undef VIRTIO_PCI_CONFIG
41
42 /* The remaining space is defined by each driver as the per-driver
43 * configuration space */
44 #define VIRTIO_PCI_CONFIG_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_enabled(dev))
45
46 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
47 VirtIOPCIProxy *dev);
48 static void virtio_pci_reset(DeviceState *qdev);
49
50 /* virtio device */
51 /* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */
52 static inline VirtIOPCIProxy *to_virtio_pci_proxy(DeviceState *d)
53 {
54 return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
55 }
56
57 /* DeviceState to VirtIOPCIProxy. Note: used on datapath,
58 * be careful and test performance if you change this.
59 */
60 static inline VirtIOPCIProxy *to_virtio_pci_proxy_fast(DeviceState *d)
61 {
62 return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
63 }
64
65 static void virtio_pci_notify(DeviceState *d, uint16_t vector)
66 {
67 VirtIOPCIProxy *proxy = to_virtio_pci_proxy_fast(d);
68
69 if (msix_enabled(&proxy->pci_dev))
70 msix_notify(&proxy->pci_dev, vector);
71 else {
72 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
73 pci_set_irq(&proxy->pci_dev, atomic_read(&vdev->isr) & 1);
74 }
75 }
76
77 static void virtio_pci_save_config(DeviceState *d, QEMUFile *f)
78 {
79 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
80 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
81
82 pci_device_save(&proxy->pci_dev, f);
83 msix_save(&proxy->pci_dev, f);
84 if (msix_present(&proxy->pci_dev))
85 qemu_put_be16(f, vdev->config_vector);
86 }
87
88 static const VMStateDescription vmstate_virtio_pci_modern_queue_state = {
89 .name = "virtio_pci/modern_queue_state",
90 .version_id = 1,
91 .minimum_version_id = 1,
92 .fields = (VMStateField[]) {
93 VMSTATE_UINT16(num, VirtIOPCIQueue),
94 VMSTATE_UNUSED(1), /* enabled was stored as be16 */
95 VMSTATE_BOOL(enabled, VirtIOPCIQueue),
96 VMSTATE_UINT32_ARRAY(desc, VirtIOPCIQueue, 2),
97 VMSTATE_UINT32_ARRAY(avail, VirtIOPCIQueue, 2),
98 VMSTATE_UINT32_ARRAY(used, VirtIOPCIQueue, 2),
99 VMSTATE_END_OF_LIST()
100 }
101 };
102
103 static bool virtio_pci_modern_state_needed(void *opaque)
104 {
105 VirtIOPCIProxy *proxy = opaque;
106
107 return virtio_pci_modern(proxy);
108 }
109
110 static const VMStateDescription vmstate_virtio_pci_modern_state_sub = {
111 .name = "virtio_pci/modern_state",
112 .version_id = 1,
113 .minimum_version_id = 1,
114 .needed = &virtio_pci_modern_state_needed,
115 .fields = (VMStateField[]) {
116 VMSTATE_UINT32(dfselect, VirtIOPCIProxy),
117 VMSTATE_UINT32(gfselect, VirtIOPCIProxy),
118 VMSTATE_UINT32_ARRAY(guest_features, VirtIOPCIProxy, 2),
119 VMSTATE_STRUCT_ARRAY(vqs, VirtIOPCIProxy, VIRTIO_QUEUE_MAX, 0,
120 vmstate_virtio_pci_modern_queue_state,
121 VirtIOPCIQueue),
122 VMSTATE_END_OF_LIST()
123 }
124 };
125
126 static const VMStateDescription vmstate_virtio_pci = {
127 .name = "virtio_pci",
128 .version_id = 1,
129 .minimum_version_id = 1,
130 .minimum_version_id_old = 1,
131 .fields = (VMStateField[]) {
132 VMSTATE_END_OF_LIST()
133 },
134 .subsections = (const VMStateDescription*[]) {
135 &vmstate_virtio_pci_modern_state_sub,
136 NULL
137 }
138 };
139
140 static bool virtio_pci_has_extra_state(DeviceState *d)
141 {
142 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
143
144 return proxy->flags & VIRTIO_PCI_FLAG_MIGRATE_EXTRA;
145 }
146
147 static void virtio_pci_save_extra_state(DeviceState *d, QEMUFile *f)
148 {
149 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
150
151 vmstate_save_state(f, &vmstate_virtio_pci, proxy, NULL);
152 }
153
154 static int virtio_pci_load_extra_state(DeviceState *d, QEMUFile *f)
155 {
156 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
157
158 return vmstate_load_state(f, &vmstate_virtio_pci, proxy, 1);
159 }
160
161 static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f)
162 {
163 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
164 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
165
166 if (msix_present(&proxy->pci_dev))
167 qemu_put_be16(f, virtio_queue_vector(vdev, n));
168 }
169
170 static int virtio_pci_load_config(DeviceState *d, QEMUFile *f)
171 {
172 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
173 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
174
175 int ret;
176 ret = pci_device_load(&proxy->pci_dev, f);
177 if (ret) {
178 return ret;
179 }
180 msix_unuse_all_vectors(&proxy->pci_dev);
181 msix_load(&proxy->pci_dev, f);
182 if (msix_present(&proxy->pci_dev)) {
183 qemu_get_be16s(f, &vdev->config_vector);
184 } else {
185 vdev->config_vector = VIRTIO_NO_VECTOR;
186 }
187 if (vdev->config_vector != VIRTIO_NO_VECTOR) {
188 return msix_vector_use(&proxy->pci_dev, vdev->config_vector);
189 }
190 return 0;
191 }
192
193 static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f)
194 {
195 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
196 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
197
198 uint16_t vector;
199 if (msix_present(&proxy->pci_dev)) {
200 qemu_get_be16s(f, &vector);
201 } else {
202 vector = VIRTIO_NO_VECTOR;
203 }
204 virtio_queue_set_vector(vdev, n, vector);
205 if (vector != VIRTIO_NO_VECTOR) {
206 return msix_vector_use(&proxy->pci_dev, vector);
207 }
208
209 return 0;
210 }
211
212 static bool virtio_pci_ioeventfd_enabled(DeviceState *d)
213 {
214 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
215
216 return (proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) != 0;
217 }
218
219 #define QEMU_VIRTIO_PCI_QUEUE_MEM_MULT 0x1000
220
221 static inline int virtio_pci_queue_mem_mult(struct VirtIOPCIProxy *proxy)
222 {
223 return (proxy->flags & VIRTIO_PCI_FLAG_PAGE_PER_VQ) ?
224 QEMU_VIRTIO_PCI_QUEUE_MEM_MULT : 4;
225 }
226
227 static int virtio_pci_ioeventfd_assign(DeviceState *d, EventNotifier *notifier,
228 int n, bool assign)
229 {
230 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
231 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
232 VirtQueue *vq = virtio_get_queue(vdev, n);
233 bool legacy = virtio_pci_legacy(proxy);
234 bool modern = virtio_pci_modern(proxy);
235 bool fast_mmio = kvm_ioeventfd_any_length_enabled();
236 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
237 MemoryRegion *modern_mr = &proxy->notify.mr;
238 MemoryRegion *modern_notify_mr = &proxy->notify_pio.mr;
239 MemoryRegion *legacy_mr = &proxy->bar;
240 hwaddr modern_addr = virtio_pci_queue_mem_mult(proxy) *
241 virtio_get_queue_index(vq);
242 hwaddr legacy_addr = VIRTIO_PCI_QUEUE_NOTIFY;
243
244 if (assign) {
245 if (modern) {
246 if (fast_mmio) {
247 memory_region_add_eventfd(modern_mr, modern_addr, 0,
248 false, n, notifier);
249 } else {
250 memory_region_add_eventfd(modern_mr, modern_addr, 2,
251 false, n, notifier);
252 }
253 if (modern_pio) {
254 memory_region_add_eventfd(modern_notify_mr, 0, 2,
255 true, n, notifier);
256 }
257 }
258 if (legacy) {
259 memory_region_add_eventfd(legacy_mr, legacy_addr, 2,
260 true, n, notifier);
261 }
262 } else {
263 if (modern) {
264 if (fast_mmio) {
265 memory_region_del_eventfd(modern_mr, modern_addr, 0,
266 false, n, notifier);
267 } else {
268 memory_region_del_eventfd(modern_mr, modern_addr, 2,
269 false, n, notifier);
270 }
271 if (modern_pio) {
272 memory_region_del_eventfd(modern_notify_mr, 0, 2,
273 true, n, notifier);
274 }
275 }
276 if (legacy) {
277 memory_region_del_eventfd(legacy_mr, legacy_addr, 2,
278 true, n, notifier);
279 }
280 }
281 return 0;
282 }
283
284 static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy)
285 {
286 virtio_bus_start_ioeventfd(&proxy->bus);
287 }
288
289 static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy)
290 {
291 virtio_bus_stop_ioeventfd(&proxy->bus);
292 }
293
294 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
295 {
296 VirtIOPCIProxy *proxy = opaque;
297 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
298 hwaddr pa;
299
300 switch (addr) {
301 case VIRTIO_PCI_GUEST_FEATURES:
302 /* Guest does not negotiate properly? We have to assume nothing. */
303 if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
304 val = virtio_bus_get_vdev_bad_features(&proxy->bus);
305 }
306 virtio_set_features(vdev, val);
307 break;
308 case VIRTIO_PCI_QUEUE_PFN:
309 pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
310 if (pa == 0) {
311 virtio_pci_reset(DEVICE(proxy));
312 }
313 else
314 virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
315 break;
316 case VIRTIO_PCI_QUEUE_SEL:
317 if (val < VIRTIO_QUEUE_MAX)
318 vdev->queue_sel = val;
319 break;
320 case VIRTIO_PCI_QUEUE_NOTIFY:
321 if (val < VIRTIO_QUEUE_MAX) {
322 virtio_queue_notify(vdev, val);
323 }
324 break;
325 case VIRTIO_PCI_STATUS:
326 if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
327 virtio_pci_stop_ioeventfd(proxy);
328 }
329
330 virtio_set_status(vdev, val & 0xFF);
331
332 if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
333 virtio_pci_start_ioeventfd(proxy);
334 }
335
336 if (vdev->status == 0) {
337 virtio_pci_reset(DEVICE(proxy));
338 }
339
340 /* Linux before 2.6.34 drives the device without enabling
341 the PCI device bus master bit. Enable it automatically
342 for the guest. This is a PCI spec violation but so is
343 initiating DMA with bus master bit clear. */
344 if (val == (VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER)) {
345 pci_default_write_config(&proxy->pci_dev, PCI_COMMAND,
346 proxy->pci_dev.config[PCI_COMMAND] |
347 PCI_COMMAND_MASTER, 1);
348 }
349 break;
350 case VIRTIO_MSI_CONFIG_VECTOR:
351 msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
352 /* Make it possible for guest to discover an error took place. */
353 if (msix_vector_use(&proxy->pci_dev, val) < 0)
354 val = VIRTIO_NO_VECTOR;
355 vdev->config_vector = val;
356 break;
357 case VIRTIO_MSI_QUEUE_VECTOR:
358 msix_vector_unuse(&proxy->pci_dev,
359 virtio_queue_vector(vdev, vdev->queue_sel));
360 /* Make it possible for guest to discover an error took place. */
361 if (msix_vector_use(&proxy->pci_dev, val) < 0)
362 val = VIRTIO_NO_VECTOR;
363 virtio_queue_set_vector(vdev, vdev->queue_sel, val);
364 break;
365 default:
366 error_report("%s: unexpected address 0x%x value 0x%x",
367 __func__, addr, val);
368 break;
369 }
370 }
371
372 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
373 {
374 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
375 uint32_t ret = 0xFFFFFFFF;
376
377 switch (addr) {
378 case VIRTIO_PCI_HOST_FEATURES:
379 ret = vdev->host_features;
380 break;
381 case VIRTIO_PCI_GUEST_FEATURES:
382 ret = vdev->guest_features;
383 break;
384 case VIRTIO_PCI_QUEUE_PFN:
385 ret = virtio_queue_get_addr(vdev, vdev->queue_sel)
386 >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
387 break;
388 case VIRTIO_PCI_QUEUE_NUM:
389 ret = virtio_queue_get_num(vdev, vdev->queue_sel);
390 break;
391 case VIRTIO_PCI_QUEUE_SEL:
392 ret = vdev->queue_sel;
393 break;
394 case VIRTIO_PCI_STATUS:
395 ret = vdev->status;
396 break;
397 case VIRTIO_PCI_ISR:
398 /* reading from the ISR also clears it. */
399 ret = atomic_xchg(&vdev->isr, 0);
400 pci_irq_deassert(&proxy->pci_dev);
401 break;
402 case VIRTIO_MSI_CONFIG_VECTOR:
403 ret = vdev->config_vector;
404 break;
405 case VIRTIO_MSI_QUEUE_VECTOR:
406 ret = virtio_queue_vector(vdev, vdev->queue_sel);
407 break;
408 default:
409 break;
410 }
411
412 return ret;
413 }
414
415 static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr,
416 unsigned size)
417 {
418 VirtIOPCIProxy *proxy = opaque;
419 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
420 uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev);
421 uint64_t val = 0;
422 if (addr < config) {
423 return virtio_ioport_read(proxy, addr);
424 }
425 addr -= config;
426
427 switch (size) {
428 case 1:
429 val = virtio_config_readb(vdev, addr);
430 break;
431 case 2:
432 val = virtio_config_readw(vdev, addr);
433 if (virtio_is_big_endian(vdev)) {
434 val = bswap16(val);
435 }
436 break;
437 case 4:
438 val = virtio_config_readl(vdev, addr);
439 if (virtio_is_big_endian(vdev)) {
440 val = bswap32(val);
441 }
442 break;
443 }
444 return val;
445 }
446
447 static void virtio_pci_config_write(void *opaque, hwaddr addr,
448 uint64_t val, unsigned size)
449 {
450 VirtIOPCIProxy *proxy = opaque;
451 uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev);
452 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
453 if (addr < config) {
454 virtio_ioport_write(proxy, addr, val);
455 return;
456 }
457 addr -= config;
458 /*
459 * Virtio-PCI is odd. Ioports are LE but config space is target native
460 * endian.
461 */
462 switch (size) {
463 case 1:
464 virtio_config_writeb(vdev, addr, val);
465 break;
466 case 2:
467 if (virtio_is_big_endian(vdev)) {
468 val = bswap16(val);
469 }
470 virtio_config_writew(vdev, addr, val);
471 break;
472 case 4:
473 if (virtio_is_big_endian(vdev)) {
474 val = bswap32(val);
475 }
476 virtio_config_writel(vdev, addr, val);
477 break;
478 }
479 }
480
481 static const MemoryRegionOps virtio_pci_config_ops = {
482 .read = virtio_pci_config_read,
483 .write = virtio_pci_config_write,
484 .impl = {
485 .min_access_size = 1,
486 .max_access_size = 4,
487 },
488 .endianness = DEVICE_LITTLE_ENDIAN,
489 };
490
491 static MemoryRegion *virtio_address_space_lookup(VirtIOPCIProxy *proxy,
492 hwaddr *off, int len)
493 {
494 int i;
495 VirtIOPCIRegion *reg;
496
497 for (i = 0; i < ARRAY_SIZE(proxy->regs); ++i) {
498 reg = &proxy->regs[i];
499 if (*off >= reg->offset &&
500 *off + len <= reg->offset + reg->size) {
501 *off -= reg->offset;
502 return &reg->mr;
503 }
504 }
505
506 return NULL;
507 }
508
509 /* Below are generic functions to do memcpy from/to an address space,
510 * without byteswaps, with input validation.
511 *
512 * As regular address_space_* APIs all do some kind of byteswap at least for
513 * some host/target combinations, we are forced to explicitly convert to a
514 * known-endianness integer value.
515 * It doesn't really matter which endian format to go through, so the code
516 * below selects the endian that causes the least amount of work on the given
517 * host.
518 *
519 * Note: host pointer must be aligned.
520 */
521 static
522 void virtio_address_space_write(VirtIOPCIProxy *proxy, hwaddr addr,
523 const uint8_t *buf, int len)
524 {
525 uint64_t val;
526 MemoryRegion *mr;
527
528 /* address_space_* APIs assume an aligned address.
529 * As address is under guest control, handle illegal values.
530 */
531 addr &= ~(len - 1);
532
533 mr = virtio_address_space_lookup(proxy, &addr, len);
534 if (!mr) {
535 return;
536 }
537
538 /* Make sure caller aligned buf properly */
539 assert(!(((uintptr_t)buf) & (len - 1)));
540
541 switch (len) {
542 case 1:
543 val = pci_get_byte(buf);
544 break;
545 case 2:
546 val = cpu_to_le16(pci_get_word(buf));
547 break;
548 case 4:
549 val = cpu_to_le32(pci_get_long(buf));
550 break;
551 default:
552 /* As length is under guest control, handle illegal values. */
553 return;
554 }
555 memory_region_dispatch_write(mr, addr, val, len, MEMTXATTRS_UNSPECIFIED);
556 }
557
558 static void
559 virtio_address_space_read(VirtIOPCIProxy *proxy, hwaddr addr,
560 uint8_t *buf, int len)
561 {
562 uint64_t val;
563 MemoryRegion *mr;
564
565 /* address_space_* APIs assume an aligned address.
566 * As address is under guest control, handle illegal values.
567 */
568 addr &= ~(len - 1);
569
570 mr = virtio_address_space_lookup(proxy, &addr, len);
571 if (!mr) {
572 return;
573 }
574
575 /* Make sure caller aligned buf properly */
576 assert(!(((uintptr_t)buf) & (len - 1)));
577
578 memory_region_dispatch_read(mr, addr, &val, len, MEMTXATTRS_UNSPECIFIED);
579 switch (len) {
580 case 1:
581 pci_set_byte(buf, val);
582 break;
583 case 2:
584 pci_set_word(buf, le16_to_cpu(val));
585 break;
586 case 4:
587 pci_set_long(buf, le32_to_cpu(val));
588 break;
589 default:
590 /* As length is under guest control, handle illegal values. */
591 break;
592 }
593 }
594
595 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
596 uint32_t val, int len)
597 {
598 VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
599 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
600 struct virtio_pci_cfg_cap *cfg;
601
602 pci_default_write_config(pci_dev, address, val, len);
603
604 if (range_covers_byte(address, len, PCI_COMMAND) &&
605 !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
606 virtio_pci_stop_ioeventfd(proxy);
607 virtio_set_status(vdev, vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
608 }
609
610 if (proxy->config_cap &&
611 ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap,
612 pci_cfg_data),
613 sizeof cfg->pci_cfg_data)) {
614 uint32_t off;
615 uint32_t len;
616
617 cfg = (void *)(proxy->pci_dev.config + proxy->config_cap);
618 off = le32_to_cpu(cfg->cap.offset);
619 len = le32_to_cpu(cfg->cap.length);
620
621 if (len == 1 || len == 2 || len == 4) {
622 assert(len <= sizeof cfg->pci_cfg_data);
623 virtio_address_space_write(proxy, off, cfg->pci_cfg_data, len);
624 }
625 }
626 }
627
628 static uint32_t virtio_read_config(PCIDevice *pci_dev,
629 uint32_t address, int len)
630 {
631 VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
632 struct virtio_pci_cfg_cap *cfg;
633
634 if (proxy->config_cap &&
635 ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap,
636 pci_cfg_data),
637 sizeof cfg->pci_cfg_data)) {
638 uint32_t off;
639 uint32_t len;
640
641 cfg = (void *)(proxy->pci_dev.config + proxy->config_cap);
642 off = le32_to_cpu(cfg->cap.offset);
643 len = le32_to_cpu(cfg->cap.length);
644
645 if (len == 1 || len == 2 || len == 4) {
646 assert(len <= sizeof cfg->pci_cfg_data);
647 virtio_address_space_read(proxy, off, cfg->pci_cfg_data, len);
648 }
649 }
650
651 return pci_default_read_config(pci_dev, address, len);
652 }
653
654 static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy,
655 unsigned int queue_no,
656 unsigned int vector)
657 {
658 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
659 int ret;
660
661 if (irqfd->users == 0) {
662 ret = kvm_irqchip_add_msi_route(kvm_state, vector, &proxy->pci_dev);
663 if (ret < 0) {
664 return ret;
665 }
666 irqfd->virq = ret;
667 }
668 irqfd->users++;
669 return 0;
670 }
671
672 static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy,
673 unsigned int vector)
674 {
675 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
676 if (--irqfd->users == 0) {
677 kvm_irqchip_release_virq(kvm_state, irqfd->virq);
678 }
679 }
680
681 static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy,
682 unsigned int queue_no,
683 unsigned int vector)
684 {
685 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
686 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
687 VirtQueue *vq = virtio_get_queue(vdev, queue_no);
688 EventNotifier *n = virtio_queue_get_guest_notifier(vq);
689 return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, n, NULL, irqfd->virq);
690 }
691
692 static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy,
693 unsigned int queue_no,
694 unsigned int vector)
695 {
696 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
697 VirtQueue *vq = virtio_get_queue(vdev, queue_no);
698 EventNotifier *n = virtio_queue_get_guest_notifier(vq);
699 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
700 int ret;
701
702 ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, n, irqfd->virq);
703 assert(ret == 0);
704 }
705
706 static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
707 {
708 PCIDevice *dev = &proxy->pci_dev;
709 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
710 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
711 unsigned int vector;
712 int ret, queue_no;
713
714 for (queue_no = 0; queue_no < nvqs; queue_no++) {
715 if (!virtio_queue_get_num(vdev, queue_no)) {
716 break;
717 }
718 vector = virtio_queue_vector(vdev, queue_no);
719 if (vector >= msix_nr_vectors_allocated(dev)) {
720 continue;
721 }
722 ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector);
723 if (ret < 0) {
724 goto undo;
725 }
726 /* If guest supports masking, set up irqfd now.
727 * Otherwise, delay until unmasked in the frontend.
728 */
729 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
730 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
731 if (ret < 0) {
732 kvm_virtio_pci_vq_vector_release(proxy, vector);
733 goto undo;
734 }
735 }
736 }
737 return 0;
738
739 undo:
740 while (--queue_no >= 0) {
741 vector = virtio_queue_vector(vdev, queue_no);
742 if (vector >= msix_nr_vectors_allocated(dev)) {
743 continue;
744 }
745 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
746 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
747 }
748 kvm_virtio_pci_vq_vector_release(proxy, vector);
749 }
750 return ret;
751 }
752
753 static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
754 {
755 PCIDevice *dev = &proxy->pci_dev;
756 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
757 unsigned int vector;
758 int queue_no;
759 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
760
761 for (queue_no = 0; queue_no < nvqs; queue_no++) {
762 if (!virtio_queue_get_num(vdev, queue_no)) {
763 break;
764 }
765 vector = virtio_queue_vector(vdev, queue_no);
766 if (vector >= msix_nr_vectors_allocated(dev)) {
767 continue;
768 }
769 /* If guest supports masking, clean up irqfd now.
770 * Otherwise, it was cleaned when masked in the frontend.
771 */
772 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
773 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
774 }
775 kvm_virtio_pci_vq_vector_release(proxy, vector);
776 }
777 }
778
779 static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy,
780 unsigned int queue_no,
781 unsigned int vector,
782 MSIMessage msg)
783 {
784 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
785 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
786 VirtQueue *vq = virtio_get_queue(vdev, queue_no);
787 EventNotifier *n = virtio_queue_get_guest_notifier(vq);
788 VirtIOIRQFD *irqfd;
789 int ret = 0;
790
791 if (proxy->vector_irqfd) {
792 irqfd = &proxy->vector_irqfd[vector];
793 if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) {
794 ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg,
795 &proxy->pci_dev);
796 if (ret < 0) {
797 return ret;
798 }
799 kvm_irqchip_commit_routes(kvm_state);
800 }
801 }
802
803 /* If guest supports masking, irqfd is already setup, unmask it.
804 * Otherwise, set it up now.
805 */
806 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
807 k->guest_notifier_mask(vdev, queue_no, false);
808 /* Test after unmasking to avoid losing events. */
809 if (k->guest_notifier_pending &&
810 k->guest_notifier_pending(vdev, queue_no)) {
811 event_notifier_set(n);
812 }
813 } else {
814 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
815 }
816 return ret;
817 }
818
819 static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy,
820 unsigned int queue_no,
821 unsigned int vector)
822 {
823 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
824 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
825
826 /* If guest supports masking, keep irqfd but mask it.
827 * Otherwise, clean it up now.
828 */
829 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
830 k->guest_notifier_mask(vdev, queue_no, true);
831 } else {
832 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
833 }
834 }
835
836 static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector,
837 MSIMessage msg)
838 {
839 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
840 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
841 VirtQueue *vq = virtio_vector_first_queue(vdev, vector);
842 int ret, index, unmasked = 0;
843
844 while (vq) {
845 index = virtio_get_queue_index(vq);
846 if (!virtio_queue_get_num(vdev, index)) {
847 break;
848 }
849 if (index < proxy->nvqs_with_notifiers) {
850 ret = virtio_pci_vq_vector_unmask(proxy, index, vector, msg);
851 if (ret < 0) {
852 goto undo;
853 }
854 ++unmasked;
855 }
856 vq = virtio_vector_next_queue(vq);
857 }
858
859 return 0;
860
861 undo:
862 vq = virtio_vector_first_queue(vdev, vector);
863 while (vq && unmasked >= 0) {
864 index = virtio_get_queue_index(vq);
865 if (index < proxy->nvqs_with_notifiers) {
866 virtio_pci_vq_vector_mask(proxy, index, vector);
867 --unmasked;
868 }
869 vq = virtio_vector_next_queue(vq);
870 }
871 return ret;
872 }
873
874 static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector)
875 {
876 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
877 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
878 VirtQueue *vq = virtio_vector_first_queue(vdev, vector);
879 int index;
880
881 while (vq) {
882 index = virtio_get_queue_index(vq);
883 if (!virtio_queue_get_num(vdev, index)) {
884 break;
885 }
886 if (index < proxy->nvqs_with_notifiers) {
887 virtio_pci_vq_vector_mask(proxy, index, vector);
888 }
889 vq = virtio_vector_next_queue(vq);
890 }
891 }
892
893 static void virtio_pci_vector_poll(PCIDevice *dev,
894 unsigned int vector_start,
895 unsigned int vector_end)
896 {
897 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
898 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
899 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
900 int queue_no;
901 unsigned int vector;
902 EventNotifier *notifier;
903 VirtQueue *vq;
904
905 for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
906 if (!virtio_queue_get_num(vdev, queue_no)) {
907 break;
908 }
909 vector = virtio_queue_vector(vdev, queue_no);
910 if (vector < vector_start || vector >= vector_end ||
911 !msix_is_masked(dev, vector)) {
912 continue;
913 }
914 vq = virtio_get_queue(vdev, queue_no);
915 notifier = virtio_queue_get_guest_notifier(vq);
916 if (k->guest_notifier_pending) {
917 if (k->guest_notifier_pending(vdev, queue_no)) {
918 msix_set_pending(dev, vector);
919 }
920 } else if (event_notifier_test_and_clear(notifier)) {
921 msix_set_pending(dev, vector);
922 }
923 }
924 }
925
926 static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
927 bool with_irqfd)
928 {
929 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
930 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
931 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
932 VirtQueue *vq = virtio_get_queue(vdev, n);
933 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
934
935 if (assign) {
936 int r = event_notifier_init(notifier, 0);
937 if (r < 0) {
938 return r;
939 }
940 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
941 } else {
942 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
943 event_notifier_cleanup(notifier);
944 }
945
946 if (!msix_enabled(&proxy->pci_dev) &&
947 vdev->use_guest_notifier_mask &&
948 vdc->guest_notifier_mask) {
949 vdc->guest_notifier_mask(vdev, n, !assign);
950 }
951
952 return 0;
953 }
954
955 static bool virtio_pci_query_guest_notifiers(DeviceState *d)
956 {
957 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
958 return msix_enabled(&proxy->pci_dev);
959 }
960
961 static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
962 {
963 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
964 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
965 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
966 int r, n;
967 bool with_irqfd = msix_enabled(&proxy->pci_dev) &&
968 kvm_msi_via_irqfd_enabled();
969
970 nvqs = MIN(nvqs, VIRTIO_QUEUE_MAX);
971
972 /* When deassigning, pass a consistent nvqs value
973 * to avoid leaking notifiers.
974 */
975 assert(assign || nvqs == proxy->nvqs_with_notifiers);
976
977 proxy->nvqs_with_notifiers = nvqs;
978
979 /* Must unset vector notifier while guest notifier is still assigned */
980 if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) {
981 msix_unset_vector_notifiers(&proxy->pci_dev);
982 if (proxy->vector_irqfd) {
983 kvm_virtio_pci_vector_release(proxy, nvqs);
984 g_free(proxy->vector_irqfd);
985 proxy->vector_irqfd = NULL;
986 }
987 }
988
989 for (n = 0; n < nvqs; n++) {
990 if (!virtio_queue_get_num(vdev, n)) {
991 break;
992 }
993
994 r = virtio_pci_set_guest_notifier(d, n, assign, with_irqfd);
995 if (r < 0) {
996 goto assign_error;
997 }
998 }
999
1000 /* Must set vector notifier after guest notifier has been assigned */
1001 if ((with_irqfd || k->guest_notifier_mask) && assign) {
1002 if (with_irqfd) {
1003 proxy->vector_irqfd =
1004 g_malloc0(sizeof(*proxy->vector_irqfd) *
1005 msix_nr_vectors_allocated(&proxy->pci_dev));
1006 r = kvm_virtio_pci_vector_use(proxy, nvqs);
1007 if (r < 0) {
1008 goto assign_error;
1009 }
1010 }
1011 r = msix_set_vector_notifiers(&proxy->pci_dev,
1012 virtio_pci_vector_unmask,
1013 virtio_pci_vector_mask,
1014 virtio_pci_vector_poll);
1015 if (r < 0) {
1016 goto notifiers_error;
1017 }
1018 }
1019
1020 return 0;
1021
1022 notifiers_error:
1023 if (with_irqfd) {
1024 assert(assign);
1025 kvm_virtio_pci_vector_release(proxy, nvqs);
1026 }
1027
1028 assign_error:
1029 /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
1030 assert(assign);
1031 while (--n >= 0) {
1032 virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd);
1033 }
1034 return r;
1035 }
1036
1037 static int virtio_pci_set_host_notifier_mr(DeviceState *d, int n,
1038 MemoryRegion *mr, bool assign)
1039 {
1040 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
1041 int offset;
1042
1043 if (n >= VIRTIO_QUEUE_MAX || !virtio_pci_modern(proxy) ||
1044 virtio_pci_queue_mem_mult(proxy) != memory_region_size(mr)) {
1045 return -1;
1046 }
1047
1048 if (assign) {
1049 offset = virtio_pci_queue_mem_mult(proxy) * n;
1050 memory_region_add_subregion_overlap(&proxy->notify.mr, offset, mr, 1);
1051 } else {
1052 memory_region_del_subregion(&proxy->notify.mr, mr);
1053 }
1054
1055 return 0;
1056 }
1057
1058 static void virtio_pci_vmstate_change(DeviceState *d, bool running)
1059 {
1060 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
1061 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1062
1063 if (running) {
1064 /* Old QEMU versions did not set bus master enable on status write.
1065 * Detect DRIVER set and enable it.
1066 */
1067 if ((proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION) &&
1068 (vdev->status & VIRTIO_CONFIG_S_DRIVER) &&
1069 !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
1070 pci_default_write_config(&proxy->pci_dev, PCI_COMMAND,
1071 proxy->pci_dev.config[PCI_COMMAND] |
1072 PCI_COMMAND_MASTER, 1);
1073 }
1074 virtio_pci_start_ioeventfd(proxy);
1075 } else {
1076 virtio_pci_stop_ioeventfd(proxy);
1077 }
1078 }
1079
1080 /*
1081 * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
1082 */
1083
1084 static int virtio_pci_query_nvectors(DeviceState *d)
1085 {
1086 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1087
1088 return proxy->nvectors;
1089 }
1090
1091 static AddressSpace *virtio_pci_get_dma_as(DeviceState *d)
1092 {
1093 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1094 PCIDevice *dev = &proxy->pci_dev;
1095
1096 return pci_get_address_space(dev);
1097 }
1098
1099 static int virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy,
1100 struct virtio_pci_cap *cap)
1101 {
1102 PCIDevice *dev = &proxy->pci_dev;
1103 int offset;
1104
1105 offset = pci_add_capability(dev, PCI_CAP_ID_VNDR, 0,
1106 cap->cap_len, &error_abort);
1107
1108 assert(cap->cap_len >= sizeof *cap);
1109 memcpy(dev->config + offset + PCI_CAP_FLAGS, &cap->cap_len,
1110 cap->cap_len - PCI_CAP_FLAGS);
1111
1112 return offset;
1113 }
1114
1115 static uint64_t virtio_pci_common_read(void *opaque, hwaddr addr,
1116 unsigned size)
1117 {
1118 VirtIOPCIProxy *proxy = opaque;
1119 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1120 uint32_t val = 0;
1121 int i;
1122
1123 switch (addr) {
1124 case VIRTIO_PCI_COMMON_DFSELECT:
1125 val = proxy->dfselect;
1126 break;
1127 case VIRTIO_PCI_COMMON_DF:
1128 if (proxy->dfselect <= 1) {
1129 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
1130
1131 val = (vdev->host_features & ~vdc->legacy_features) >>
1132 (32 * proxy->dfselect);
1133 }
1134 break;
1135 case VIRTIO_PCI_COMMON_GFSELECT:
1136 val = proxy->gfselect;
1137 break;
1138 case VIRTIO_PCI_COMMON_GF:
1139 if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) {
1140 val = proxy->guest_features[proxy->gfselect];
1141 }
1142 break;
1143 case VIRTIO_PCI_COMMON_MSIX:
1144 val = vdev->config_vector;
1145 break;
1146 case VIRTIO_PCI_COMMON_NUMQ:
1147 for (i = 0; i < VIRTIO_QUEUE_MAX; ++i) {
1148 if (virtio_queue_get_num(vdev, i)) {
1149 val = i + 1;
1150 }
1151 }
1152 break;
1153 case VIRTIO_PCI_COMMON_STATUS:
1154 val = vdev->status;
1155 break;
1156 case VIRTIO_PCI_COMMON_CFGGENERATION:
1157 val = vdev->generation;
1158 break;
1159 case VIRTIO_PCI_COMMON_Q_SELECT:
1160 val = vdev->queue_sel;
1161 break;
1162 case VIRTIO_PCI_COMMON_Q_SIZE:
1163 val = virtio_queue_get_num(vdev, vdev->queue_sel);
1164 break;
1165 case VIRTIO_PCI_COMMON_Q_MSIX:
1166 val = virtio_queue_vector(vdev, vdev->queue_sel);
1167 break;
1168 case VIRTIO_PCI_COMMON_Q_ENABLE:
1169 val = proxy->vqs[vdev->queue_sel].enabled;
1170 break;
1171 case VIRTIO_PCI_COMMON_Q_NOFF:
1172 /* Simply map queues in order */
1173 val = vdev->queue_sel;
1174 break;
1175 case VIRTIO_PCI_COMMON_Q_DESCLO:
1176 val = proxy->vqs[vdev->queue_sel].desc[0];
1177 break;
1178 case VIRTIO_PCI_COMMON_Q_DESCHI:
1179 val = proxy->vqs[vdev->queue_sel].desc[1];
1180 break;
1181 case VIRTIO_PCI_COMMON_Q_AVAILLO:
1182 val = proxy->vqs[vdev->queue_sel].avail[0];
1183 break;
1184 case VIRTIO_PCI_COMMON_Q_AVAILHI:
1185 val = proxy->vqs[vdev->queue_sel].avail[1];
1186 break;
1187 case VIRTIO_PCI_COMMON_Q_USEDLO:
1188 val = proxy->vqs[vdev->queue_sel].used[0];
1189 break;
1190 case VIRTIO_PCI_COMMON_Q_USEDHI:
1191 val = proxy->vqs[vdev->queue_sel].used[1];
1192 break;
1193 default:
1194 val = 0;
1195 }
1196
1197 return val;
1198 }
1199
1200 static void virtio_pci_common_write(void *opaque, hwaddr addr,
1201 uint64_t val, unsigned size)
1202 {
1203 VirtIOPCIProxy *proxy = opaque;
1204 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1205
1206 switch (addr) {
1207 case VIRTIO_PCI_COMMON_DFSELECT:
1208 proxy->dfselect = val;
1209 break;
1210 case VIRTIO_PCI_COMMON_GFSELECT:
1211 proxy->gfselect = val;
1212 break;
1213 case VIRTIO_PCI_COMMON_GF:
1214 if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) {
1215 proxy->guest_features[proxy->gfselect] = val;
1216 virtio_set_features(vdev,
1217 (((uint64_t)proxy->guest_features[1]) << 32) |
1218 proxy->guest_features[0]);
1219 }
1220 break;
1221 case VIRTIO_PCI_COMMON_MSIX:
1222 msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
1223 /* Make it possible for guest to discover an error took place. */
1224 if (msix_vector_use(&proxy->pci_dev, val) < 0) {
1225 val = VIRTIO_NO_VECTOR;
1226 }
1227 vdev->config_vector = val;
1228 break;
1229 case VIRTIO_PCI_COMMON_STATUS:
1230 if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
1231 virtio_pci_stop_ioeventfd(proxy);
1232 }
1233
1234 virtio_set_status(vdev, val & 0xFF);
1235
1236 if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
1237 virtio_pci_start_ioeventfd(proxy);
1238 }
1239
1240 if (vdev->status == 0) {
1241 virtio_pci_reset(DEVICE(proxy));
1242 }
1243
1244 break;
1245 case VIRTIO_PCI_COMMON_Q_SELECT:
1246 if (val < VIRTIO_QUEUE_MAX) {
1247 vdev->queue_sel = val;
1248 }
1249 break;
1250 case VIRTIO_PCI_COMMON_Q_SIZE:
1251 proxy->vqs[vdev->queue_sel].num = val;
1252 break;
1253 case VIRTIO_PCI_COMMON_Q_MSIX:
1254 msix_vector_unuse(&proxy->pci_dev,
1255 virtio_queue_vector(vdev, vdev->queue_sel));
1256 /* Make it possible for guest to discover an error took place. */
1257 if (msix_vector_use(&proxy->pci_dev, val) < 0) {
1258 val = VIRTIO_NO_VECTOR;
1259 }
1260 virtio_queue_set_vector(vdev, vdev->queue_sel, val);
1261 break;
1262 case VIRTIO_PCI_COMMON_Q_ENABLE:
1263 virtio_queue_set_num(vdev, vdev->queue_sel,
1264 proxy->vqs[vdev->queue_sel].num);
1265 virtio_queue_set_rings(vdev, vdev->queue_sel,
1266 ((uint64_t)proxy->vqs[vdev->queue_sel].desc[1]) << 32 |
1267 proxy->vqs[vdev->queue_sel].desc[0],
1268 ((uint64_t)proxy->vqs[vdev->queue_sel].avail[1]) << 32 |
1269 proxy->vqs[vdev->queue_sel].avail[0],
1270 ((uint64_t)proxy->vqs[vdev->queue_sel].used[1]) << 32 |
1271 proxy->vqs[vdev->queue_sel].used[0]);
1272 proxy->vqs[vdev->queue_sel].enabled = 1;
1273 break;
1274 case VIRTIO_PCI_COMMON_Q_DESCLO:
1275 proxy->vqs[vdev->queue_sel].desc[0] = val;
1276 break;
1277 case VIRTIO_PCI_COMMON_Q_DESCHI:
1278 proxy->vqs[vdev->queue_sel].desc[1] = val;
1279 break;
1280 case VIRTIO_PCI_COMMON_Q_AVAILLO:
1281 proxy->vqs[vdev->queue_sel].avail[0] = val;
1282 break;
1283 case VIRTIO_PCI_COMMON_Q_AVAILHI:
1284 proxy->vqs[vdev->queue_sel].avail[1] = val;
1285 break;
1286 case VIRTIO_PCI_COMMON_Q_USEDLO:
1287 proxy->vqs[vdev->queue_sel].used[0] = val;
1288 break;
1289 case VIRTIO_PCI_COMMON_Q_USEDHI:
1290 proxy->vqs[vdev->queue_sel].used[1] = val;
1291 break;
1292 default:
1293 break;
1294 }
1295 }
1296
1297
1298 static uint64_t virtio_pci_notify_read(void *opaque, hwaddr addr,
1299 unsigned size)
1300 {
1301 return 0;
1302 }
1303
1304 static void virtio_pci_notify_write(void *opaque, hwaddr addr,
1305 uint64_t val, unsigned size)
1306 {
1307 VirtIODevice *vdev = opaque;
1308 VirtIOPCIProxy *proxy = VIRTIO_PCI(DEVICE(vdev)->parent_bus->parent);
1309 unsigned queue = addr / virtio_pci_queue_mem_mult(proxy);
1310
1311 if (queue < VIRTIO_QUEUE_MAX) {
1312 virtio_queue_notify(vdev, queue);
1313 }
1314 }
1315
1316 static void virtio_pci_notify_write_pio(void *opaque, hwaddr addr,
1317 uint64_t val, unsigned size)
1318 {
1319 VirtIODevice *vdev = opaque;
1320 unsigned queue = val;
1321
1322 if (queue < VIRTIO_QUEUE_MAX) {
1323 virtio_queue_notify(vdev, queue);
1324 }
1325 }
1326
1327 static uint64_t virtio_pci_isr_read(void *opaque, hwaddr addr,
1328 unsigned size)
1329 {
1330 VirtIOPCIProxy *proxy = opaque;
1331 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1332 uint64_t val = atomic_xchg(&vdev->isr, 0);
1333 pci_irq_deassert(&proxy->pci_dev);
1334
1335 return val;
1336 }
1337
1338 static void virtio_pci_isr_write(void *opaque, hwaddr addr,
1339 uint64_t val, unsigned size)
1340 {
1341 }
1342
1343 static uint64_t virtio_pci_device_read(void *opaque, hwaddr addr,
1344 unsigned size)
1345 {
1346 VirtIODevice *vdev = opaque;
1347 uint64_t val = 0;
1348
1349 switch (size) {
1350 case 1:
1351 val = virtio_config_modern_readb(vdev, addr);
1352 break;
1353 case 2:
1354 val = virtio_config_modern_readw(vdev, addr);
1355 break;
1356 case 4:
1357 val = virtio_config_modern_readl(vdev, addr);
1358 break;
1359 }
1360 return val;
1361 }
1362
1363 static void virtio_pci_device_write(void *opaque, hwaddr addr,
1364 uint64_t val, unsigned size)
1365 {
1366 VirtIODevice *vdev = opaque;
1367 switch (size) {
1368 case 1:
1369 virtio_config_modern_writeb(vdev, addr, val);
1370 break;
1371 case 2:
1372 virtio_config_modern_writew(vdev, addr, val);
1373 break;
1374 case 4:
1375 virtio_config_modern_writel(vdev, addr, val);
1376 break;
1377 }
1378 }
1379
1380 static void virtio_pci_modern_regions_init(VirtIOPCIProxy *proxy)
1381 {
1382 static const MemoryRegionOps common_ops = {
1383 .read = virtio_pci_common_read,
1384 .write = virtio_pci_common_write,
1385 .impl = {
1386 .min_access_size = 1,
1387 .max_access_size = 4,
1388 },
1389 .endianness = DEVICE_LITTLE_ENDIAN,
1390 };
1391 static const MemoryRegionOps isr_ops = {
1392 .read = virtio_pci_isr_read,
1393 .write = virtio_pci_isr_write,
1394 .impl = {
1395 .min_access_size = 1,
1396 .max_access_size = 4,
1397 },
1398 .endianness = DEVICE_LITTLE_ENDIAN,
1399 };
1400 static const MemoryRegionOps device_ops = {
1401 .read = virtio_pci_device_read,
1402 .write = virtio_pci_device_write,
1403 .impl = {
1404 .min_access_size = 1,
1405 .max_access_size = 4,
1406 },
1407 .endianness = DEVICE_LITTLE_ENDIAN,
1408 };
1409 static const MemoryRegionOps notify_ops = {
1410 .read = virtio_pci_notify_read,
1411 .write = virtio_pci_notify_write,
1412 .impl = {
1413 .min_access_size = 1,
1414 .max_access_size = 4,
1415 },
1416 .endianness = DEVICE_LITTLE_ENDIAN,
1417 };
1418 static const MemoryRegionOps notify_pio_ops = {
1419 .read = virtio_pci_notify_read,
1420 .write = virtio_pci_notify_write_pio,
1421 .impl = {
1422 .min_access_size = 1,
1423 .max_access_size = 4,
1424 },
1425 .endianness = DEVICE_LITTLE_ENDIAN,
1426 };
1427
1428
1429 memory_region_init_io(&proxy->common.mr, OBJECT(proxy),
1430 &common_ops,
1431 proxy,
1432 "virtio-pci-common",
1433 proxy->common.size);
1434
1435 memory_region_init_io(&proxy->isr.mr, OBJECT(proxy),
1436 &isr_ops,
1437 proxy,
1438 "virtio-pci-isr",
1439 proxy->isr.size);
1440
1441 memory_region_init_io(&proxy->device.mr, OBJECT(proxy),
1442 &device_ops,
1443 virtio_bus_get_device(&proxy->bus),
1444 "virtio-pci-device",
1445 proxy->device.size);
1446
1447 memory_region_init_io(&proxy->notify.mr, OBJECT(proxy),
1448 &notify_ops,
1449 virtio_bus_get_device(&proxy->bus),
1450 "virtio-pci-notify",
1451 proxy->notify.size);
1452
1453 memory_region_init_io(&proxy->notify_pio.mr, OBJECT(proxy),
1454 &notify_pio_ops,
1455 virtio_bus_get_device(&proxy->bus),
1456 "virtio-pci-notify-pio",
1457 proxy->notify_pio.size);
1458 }
1459
1460 static void virtio_pci_modern_region_map(VirtIOPCIProxy *proxy,
1461 VirtIOPCIRegion *region,
1462 struct virtio_pci_cap *cap,
1463 MemoryRegion *mr,
1464 uint8_t bar)
1465 {
1466 memory_region_add_subregion(mr, region->offset, &region->mr);
1467
1468 cap->cfg_type = region->type;
1469 cap->bar = bar;
1470 cap->offset = cpu_to_le32(region->offset);
1471 cap->length = cpu_to_le32(region->size);
1472 virtio_pci_add_mem_cap(proxy, cap);
1473
1474 }
1475
1476 static void virtio_pci_modern_mem_region_map(VirtIOPCIProxy *proxy,
1477 VirtIOPCIRegion *region,
1478 struct virtio_pci_cap *cap)
1479 {
1480 virtio_pci_modern_region_map(proxy, region, cap,
1481 &proxy->modern_bar, proxy->modern_mem_bar_idx);
1482 }
1483
1484 static void virtio_pci_modern_io_region_map(VirtIOPCIProxy *proxy,
1485 VirtIOPCIRegion *region,
1486 struct virtio_pci_cap *cap)
1487 {
1488 virtio_pci_modern_region_map(proxy, region, cap,
1489 &proxy->io_bar, proxy->modern_io_bar_idx);
1490 }
1491
1492 static void virtio_pci_modern_mem_region_unmap(VirtIOPCIProxy *proxy,
1493 VirtIOPCIRegion *region)
1494 {
1495 memory_region_del_subregion(&proxy->modern_bar,
1496 &region->mr);
1497 }
1498
1499 static void virtio_pci_modern_io_region_unmap(VirtIOPCIProxy *proxy,
1500 VirtIOPCIRegion *region)
1501 {
1502 memory_region_del_subregion(&proxy->io_bar,
1503 &region->mr);
1504 }
1505
1506 static void virtio_pci_pre_plugged(DeviceState *d, Error **errp)
1507 {
1508 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1509 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1510
1511 if (virtio_pci_modern(proxy)) {
1512 virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1);
1513 }
1514
1515 virtio_add_feature(&vdev->host_features, VIRTIO_F_BAD_FEATURE);
1516 }
1517
1518 /* This is called by virtio-bus just after the device is plugged. */
1519 static void virtio_pci_device_plugged(DeviceState *d, Error **errp)
1520 {
1521 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1522 VirtioBusState *bus = &proxy->bus;
1523 bool legacy = virtio_pci_legacy(proxy);
1524 bool modern;
1525 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
1526 uint8_t *config;
1527 uint32_t size;
1528 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1529
1530 /*
1531 * Virtio capabilities present without
1532 * VIRTIO_F_VERSION_1 confuses guests
1533 */
1534 if (!proxy->ignore_backend_features &&
1535 !virtio_has_feature(vdev->host_features, VIRTIO_F_VERSION_1)) {
1536 virtio_pci_disable_modern(proxy);
1537
1538 if (!legacy) {
1539 error_setg(errp, "Device doesn't support modern mode, and legacy"
1540 " mode is disabled");
1541 error_append_hint(errp, "Set disable-legacy to off\n");
1542
1543 return;
1544 }
1545 }
1546
1547 modern = virtio_pci_modern(proxy);
1548
1549 config = proxy->pci_dev.config;
1550 if (proxy->class_code) {
1551 pci_config_set_class(config, proxy->class_code);
1552 }
1553
1554 if (legacy) {
1555 if (virtio_host_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM)) {
1556 error_setg(errp, "VIRTIO_F_IOMMU_PLATFORM was supported by"
1557 " neither legacy nor transitional device");
1558 return ;
1559 }
1560 /*
1561 * Legacy and transitional devices use specific subsystem IDs.
1562 * Note that the subsystem vendor ID (config + PCI_SUBSYSTEM_VENDOR_ID)
1563 * is set to PCI_SUBVENDOR_ID_REDHAT_QUMRANET by default.
1564 */
1565 pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus));
1566 } else {
1567 /* pure virtio-1.0 */
1568 pci_set_word(config + PCI_VENDOR_ID,
1569 PCI_VENDOR_ID_REDHAT_QUMRANET);
1570 pci_set_word(config + PCI_DEVICE_ID,
1571 0x1040 + virtio_bus_get_vdev_id(bus));
1572 pci_config_set_revision(config, 1);
1573 }
1574 config[PCI_INTERRUPT_PIN] = 1;
1575
1576
1577 if (modern) {
1578 struct virtio_pci_cap cap = {
1579 .cap_len = sizeof cap,
1580 };
1581 struct virtio_pci_notify_cap notify = {
1582 .cap.cap_len = sizeof notify,
1583 .notify_off_multiplier =
1584 cpu_to_le32(virtio_pci_queue_mem_mult(proxy)),
1585 };
1586 struct virtio_pci_cfg_cap cfg = {
1587 .cap.cap_len = sizeof cfg,
1588 .cap.cfg_type = VIRTIO_PCI_CAP_PCI_CFG,
1589 };
1590 struct virtio_pci_notify_cap notify_pio = {
1591 .cap.cap_len = sizeof notify,
1592 .notify_off_multiplier = cpu_to_le32(0x0),
1593 };
1594
1595 struct virtio_pci_cfg_cap *cfg_mask;
1596
1597 virtio_pci_modern_regions_init(proxy);
1598
1599 virtio_pci_modern_mem_region_map(proxy, &proxy->common, &cap);
1600 virtio_pci_modern_mem_region_map(proxy, &proxy->isr, &cap);
1601 virtio_pci_modern_mem_region_map(proxy, &proxy->device, &cap);
1602 virtio_pci_modern_mem_region_map(proxy, &proxy->notify, &notify.cap);
1603
1604 if (modern_pio) {
1605 memory_region_init(&proxy->io_bar, OBJECT(proxy),
1606 "virtio-pci-io", 0x4);
1607
1608 pci_register_bar(&proxy->pci_dev, proxy->modern_io_bar_idx,
1609 PCI_BASE_ADDRESS_SPACE_IO, &proxy->io_bar);
1610
1611 virtio_pci_modern_io_region_map(proxy, &proxy->notify_pio,
1612 &notify_pio.cap);
1613 }
1614
1615 pci_register_bar(&proxy->pci_dev, proxy->modern_mem_bar_idx,
1616 PCI_BASE_ADDRESS_SPACE_MEMORY |
1617 PCI_BASE_ADDRESS_MEM_PREFETCH |
1618 PCI_BASE_ADDRESS_MEM_TYPE_64,
1619 &proxy->modern_bar);
1620
1621 proxy->config_cap = virtio_pci_add_mem_cap(proxy, &cfg.cap);
1622 cfg_mask = (void *)(proxy->pci_dev.wmask + proxy->config_cap);
1623 pci_set_byte(&cfg_mask->cap.bar, ~0x0);
1624 pci_set_long((uint8_t *)&cfg_mask->cap.offset, ~0x0);
1625 pci_set_long((uint8_t *)&cfg_mask->cap.length, ~0x0);
1626 pci_set_long(cfg_mask->pci_cfg_data, ~0x0);
1627 }
1628
1629 if (proxy->nvectors) {
1630 int err = msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors,
1631 proxy->msix_bar_idx, NULL);
1632 if (err) {
1633 /* Notice when a system that supports MSIx can't initialize it */
1634 if (err != -ENOTSUP) {
1635 warn_report("unable to init msix vectors to %" PRIu32,
1636 proxy->nvectors);
1637 }
1638 proxy->nvectors = 0;
1639 }
1640 }
1641
1642 proxy->pci_dev.config_write = virtio_write_config;
1643 proxy->pci_dev.config_read = virtio_read_config;
1644
1645 if (legacy) {
1646 size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev)
1647 + virtio_bus_get_vdev_config_len(bus);
1648 size = pow2ceil(size);
1649
1650 memory_region_init_io(&proxy->bar, OBJECT(proxy),
1651 &virtio_pci_config_ops,
1652 proxy, "virtio-pci", size);
1653
1654 pci_register_bar(&proxy->pci_dev, proxy->legacy_io_bar_idx,
1655 PCI_BASE_ADDRESS_SPACE_IO, &proxy->bar);
1656 }
1657 }
1658
1659 static void virtio_pci_device_unplugged(DeviceState *d)
1660 {
1661 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1662 bool modern = virtio_pci_modern(proxy);
1663 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
1664
1665 virtio_pci_stop_ioeventfd(proxy);
1666
1667 if (modern) {
1668 virtio_pci_modern_mem_region_unmap(proxy, &proxy->common);
1669 virtio_pci_modern_mem_region_unmap(proxy, &proxy->isr);
1670 virtio_pci_modern_mem_region_unmap(proxy, &proxy->device);
1671 virtio_pci_modern_mem_region_unmap(proxy, &proxy->notify);
1672 if (modern_pio) {
1673 virtio_pci_modern_io_region_unmap(proxy, &proxy->notify_pio);
1674 }
1675 }
1676 }
1677
1678 static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
1679 {
1680 VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
1681 VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev);
1682 bool pcie_port = pci_bus_is_express(pci_get_bus(pci_dev)) &&
1683 !pci_bus_is_root(pci_get_bus(pci_dev));
1684
1685 if (kvm_enabled() && !kvm_has_many_ioeventfds()) {
1686 proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
1687 }
1688
1689 /*
1690 * virtio pci bar layout used by default.
1691 * subclasses can re-arrange things if needed.
1692 *
1693 * region 0 -- virtio legacy io bar
1694 * region 1 -- msi-x bar
1695 * region 4+5 -- virtio modern memory (64bit) bar
1696 *
1697 */
1698 proxy->legacy_io_bar_idx = 0;
1699 proxy->msix_bar_idx = 1;
1700 proxy->modern_io_bar_idx = 2;
1701 proxy->modern_mem_bar_idx = 4;
1702
1703 proxy->common.offset = 0x0;
1704 proxy->common.size = 0x1000;
1705 proxy->common.type = VIRTIO_PCI_CAP_COMMON_CFG;
1706
1707 proxy->isr.offset = 0x1000;
1708 proxy->isr.size = 0x1000;
1709 proxy->isr.type = VIRTIO_PCI_CAP_ISR_CFG;
1710
1711 proxy->device.offset = 0x2000;
1712 proxy->device.size = 0x1000;
1713 proxy->device.type = VIRTIO_PCI_CAP_DEVICE_CFG;
1714
1715 proxy->notify.offset = 0x3000;
1716 proxy->notify.size = virtio_pci_queue_mem_mult(proxy) * VIRTIO_QUEUE_MAX;
1717 proxy->notify.type = VIRTIO_PCI_CAP_NOTIFY_CFG;
1718
1719 proxy->notify_pio.offset = 0x0;
1720 proxy->notify_pio.size = 0x4;
1721 proxy->notify_pio.type = VIRTIO_PCI_CAP_NOTIFY_CFG;
1722
1723 /* subclasses can enforce modern, so do this unconditionally */
1724 memory_region_init(&proxy->modern_bar, OBJECT(proxy), "virtio-pci",
1725 /* PCI BAR regions must be powers of 2 */
1726 pow2ceil(proxy->notify.offset + proxy->notify.size));
1727
1728 if (proxy->disable_legacy == ON_OFF_AUTO_AUTO) {
1729 proxy->disable_legacy = pcie_port ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF;
1730 }
1731
1732 if (!virtio_pci_modern(proxy) && !virtio_pci_legacy(proxy)) {
1733 error_setg(errp, "device cannot work as neither modern nor legacy mode"
1734 " is enabled");
1735 error_append_hint(errp, "Set either disable-modern or disable-legacy"
1736 " to off\n");
1737 return;
1738 }
1739
1740 if (pcie_port && pci_is_express(pci_dev)) {
1741 int pos;
1742
1743 pos = pcie_endpoint_cap_init(pci_dev, 0);
1744 assert(pos > 0);
1745
1746 pos = pci_add_capability(pci_dev, PCI_CAP_ID_PM, 0,
1747 PCI_PM_SIZEOF, errp);
1748 if (pos < 0) {
1749 return;
1750 }
1751
1752 pci_dev->exp.pm_cap = pos;
1753
1754 /*
1755 * Indicates that this function complies with revision 1.2 of the
1756 * PCI Power Management Interface Specification.
1757 */
1758 pci_set_word(pci_dev->config + pos + PCI_PM_PMC, 0x3);
1759
1760 if (proxy->flags & VIRTIO_PCI_FLAG_INIT_DEVERR) {
1761 /* Init error enabling flags */
1762 pcie_cap_deverr_init(pci_dev);
1763 }
1764
1765 if (proxy->flags & VIRTIO_PCI_FLAG_INIT_LNKCTL) {
1766 /* Init Link Control Register */
1767 pcie_cap_lnkctl_init(pci_dev);
1768 }
1769
1770 if (proxy->flags & VIRTIO_PCI_FLAG_INIT_PM) {
1771 /* Init Power Management Control Register */
1772 pci_set_word(pci_dev->wmask + pos + PCI_PM_CTRL,
1773 PCI_PM_CTRL_STATE_MASK);
1774 }
1775
1776 if (proxy->flags & VIRTIO_PCI_FLAG_ATS) {
1777 pcie_ats_init(pci_dev, 256);
1778 }
1779
1780 } else {
1781 /*
1782 * make future invocations of pci_is_express() return false
1783 * and pci_config_size() return PCI_CONFIG_SPACE_SIZE.
1784 */
1785 pci_dev->cap_present &= ~QEMU_PCI_CAP_EXPRESS;
1786 }
1787
1788 virtio_pci_bus_new(&proxy->bus, sizeof(proxy->bus), proxy);
1789 if (k->realize) {
1790 k->realize(proxy, errp);
1791 }
1792 }
1793
1794 static void virtio_pci_exit(PCIDevice *pci_dev)
1795 {
1796 msix_uninit_exclusive_bar(pci_dev);
1797 }
1798
1799 static void virtio_pci_reset(DeviceState *qdev)
1800 {
1801 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
1802 VirtioBusState *bus = VIRTIO_BUS(&proxy->bus);
1803 PCIDevice *dev = PCI_DEVICE(qdev);
1804 int i;
1805
1806 virtio_pci_stop_ioeventfd(proxy);
1807 virtio_bus_reset(bus);
1808 msix_unuse_all_vectors(&proxy->pci_dev);
1809
1810 for (i = 0; i < VIRTIO_QUEUE_MAX; i++) {
1811 proxy->vqs[i].enabled = 0;
1812 proxy->vqs[i].num = 0;
1813 proxy->vqs[i].desc[0] = proxy->vqs[i].desc[1] = 0;
1814 proxy->vqs[i].avail[0] = proxy->vqs[i].avail[1] = 0;
1815 proxy->vqs[i].used[0] = proxy->vqs[i].used[1] = 0;
1816 }
1817
1818 if (pci_is_express(dev)) {
1819 pcie_cap_deverr_reset(dev);
1820 pcie_cap_lnkctl_reset(dev);
1821
1822 pci_set_word(dev->config + dev->exp.pm_cap + PCI_PM_CTRL, 0);
1823 }
1824 }
1825
1826 static Property virtio_pci_properties[] = {
1827 DEFINE_PROP_BIT("virtio-pci-bus-master-bug-migration", VirtIOPCIProxy, flags,
1828 VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT, false),
1829 DEFINE_PROP_BIT("migrate-extra", VirtIOPCIProxy, flags,
1830 VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT, true),
1831 DEFINE_PROP_BIT("modern-pio-notify", VirtIOPCIProxy, flags,
1832 VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT, false),
1833 DEFINE_PROP_BIT("x-disable-pcie", VirtIOPCIProxy, flags,
1834 VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT, false),
1835 DEFINE_PROP_BIT("page-per-vq", VirtIOPCIProxy, flags,
1836 VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT, false),
1837 DEFINE_PROP_BOOL("x-ignore-backend-features", VirtIOPCIProxy,
1838 ignore_backend_features, false),
1839 DEFINE_PROP_BIT("ats", VirtIOPCIProxy, flags,
1840 VIRTIO_PCI_FLAG_ATS_BIT, false),
1841 DEFINE_PROP_BIT("x-pcie-deverr-init", VirtIOPCIProxy, flags,
1842 VIRTIO_PCI_FLAG_INIT_DEVERR_BIT, true),
1843 DEFINE_PROP_BIT("x-pcie-lnkctl-init", VirtIOPCIProxy, flags,
1844 VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT, true),
1845 DEFINE_PROP_BIT("x-pcie-pm-init", VirtIOPCIProxy, flags,
1846 VIRTIO_PCI_FLAG_INIT_PM_BIT, true),
1847 DEFINE_PROP_END_OF_LIST(),
1848 };
1849
1850 static void virtio_pci_dc_realize(DeviceState *qdev, Error **errp)
1851 {
1852 VirtioPCIClass *vpciklass = VIRTIO_PCI_GET_CLASS(qdev);
1853 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
1854 PCIDevice *pci_dev = &proxy->pci_dev;
1855
1856 if (!(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_PCIE) &&
1857 virtio_pci_modern(proxy)) {
1858 pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
1859 }
1860
1861 vpciklass->parent_dc_realize(qdev, errp);
1862 }
1863
1864 static void virtio_pci_class_init(ObjectClass *klass, void *data)
1865 {
1866 DeviceClass *dc = DEVICE_CLASS(klass);
1867 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1868 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
1869
1870 dc->props = virtio_pci_properties;
1871 k->realize = virtio_pci_realize;
1872 k->exit = virtio_pci_exit;
1873 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1874 k->revision = VIRTIO_PCI_ABI_VERSION;
1875 k->class_id = PCI_CLASS_OTHERS;
1876 device_class_set_parent_realize(dc, virtio_pci_dc_realize,
1877 &vpciklass->parent_dc_realize);
1878 dc->reset = virtio_pci_reset;
1879 }
1880
1881 static const TypeInfo virtio_pci_info = {
1882 .name = TYPE_VIRTIO_PCI,
1883 .parent = TYPE_PCI_DEVICE,
1884 .instance_size = sizeof(VirtIOPCIProxy),
1885 .class_init = virtio_pci_class_init,
1886 .class_size = sizeof(VirtioPCIClass),
1887 .abstract = true,
1888 };
1889
1890 static Property virtio_pci_generic_properties[] = {
1891 DEFINE_PROP_ON_OFF_AUTO("disable-legacy", VirtIOPCIProxy, disable_legacy,
1892 ON_OFF_AUTO_AUTO),
1893 DEFINE_PROP_BOOL("disable-modern", VirtIOPCIProxy, disable_modern, false),
1894 DEFINE_PROP_END_OF_LIST(),
1895 };
1896
1897 static void virtio_pci_base_class_init(ObjectClass *klass, void *data)
1898 {
1899 const VirtioPCIDeviceTypeInfo *t = data;
1900 if (t->class_init) {
1901 t->class_init(klass, NULL);
1902 }
1903 }
1904
1905 static void virtio_pci_generic_class_init(ObjectClass *klass, void *data)
1906 {
1907 DeviceClass *dc = DEVICE_CLASS(klass);
1908
1909 dc->props = virtio_pci_generic_properties;
1910 }
1911
1912 /* Used when the generic type and the base type is the same */
1913 static void virtio_pci_generic_base_class_init(ObjectClass *klass, void *data)
1914 {
1915 virtio_pci_base_class_init(klass, data);
1916 virtio_pci_generic_class_init(klass, NULL);
1917 }
1918
1919 static void virtio_pci_transitional_instance_init(Object *obj)
1920 {
1921 VirtIOPCIProxy *proxy = VIRTIO_PCI(obj);
1922
1923 proxy->disable_legacy = ON_OFF_AUTO_OFF;
1924 proxy->disable_modern = false;
1925 }
1926
1927 static void virtio_pci_non_transitional_instance_init(Object *obj)
1928 {
1929 VirtIOPCIProxy *proxy = VIRTIO_PCI(obj);
1930
1931 proxy->disable_legacy = ON_OFF_AUTO_ON;
1932 proxy->disable_modern = false;
1933 }
1934
1935 void virtio_pci_types_register(const VirtioPCIDeviceTypeInfo *t)
1936 {
1937 TypeInfo base_type_info = {
1938 .name = t->base_name,
1939 .parent = t->parent ? t->parent : TYPE_VIRTIO_PCI,
1940 .instance_size = t->instance_size,
1941 .instance_init = t->instance_init,
1942 .class_init = virtio_pci_base_class_init,
1943 .class_data = (void *)t,
1944 .abstract = true,
1945 };
1946 TypeInfo generic_type_info = {
1947 .name = t->generic_name,
1948 .parent = base_type_info.name,
1949 .class_init = virtio_pci_generic_class_init,
1950 .interfaces = (InterfaceInfo[]) {
1951 { INTERFACE_PCIE_DEVICE },
1952 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
1953 { }
1954 },
1955 };
1956
1957 if (!base_type_info.name) {
1958 /* No base type -> register a single generic device type */
1959 base_type_info.name = t->generic_name;
1960 base_type_info.class_init = virtio_pci_generic_base_class_init;
1961 base_type_info.interfaces = generic_type_info.interfaces;
1962 base_type_info.abstract = false;
1963 generic_type_info.name = NULL;
1964 assert(!t->non_transitional_name);
1965 assert(!t->transitional_name);
1966 }
1967
1968 type_register(&base_type_info);
1969 if (generic_type_info.name) {
1970 type_register(&generic_type_info);
1971 }
1972
1973 if (t->non_transitional_name) {
1974 const TypeInfo non_transitional_type_info = {
1975 .name = t->non_transitional_name,
1976 .parent = base_type_info.name,
1977 .instance_init = virtio_pci_non_transitional_instance_init,
1978 .interfaces = (InterfaceInfo[]) {
1979 { INTERFACE_PCIE_DEVICE },
1980 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
1981 { }
1982 },
1983 };
1984 type_register(&non_transitional_type_info);
1985 }
1986
1987 if (t->transitional_name) {
1988 const TypeInfo transitional_type_info = {
1989 .name = t->transitional_name,
1990 .parent = base_type_info.name,
1991 .instance_init = virtio_pci_transitional_instance_init,
1992 .interfaces = (InterfaceInfo[]) {
1993 /*
1994 * Transitional virtio devices work only as Conventional PCI
1995 * devices because they require PIO ports.
1996 */
1997 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
1998 { }
1999 },
2000 };
2001 type_register(&transitional_type_info);
2002 }
2003 }
2004
2005 /* virtio-blk-pci */
2006
2007 static Property virtio_blk_pci_properties[] = {
2008 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
2009 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
2010 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
2011 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
2012 DEV_NVECTORS_UNSPECIFIED),
2013 DEFINE_PROP_END_OF_LIST(),
2014 };
2015
2016 static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2017 {
2018 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
2019 DeviceState *vdev = DEVICE(&dev->vdev);
2020
2021 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2022 vpci_dev->nvectors = dev->vdev.conf.num_queues + 1;
2023 }
2024
2025 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2026 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2027 }
2028
2029 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
2030 {
2031 DeviceClass *dc = DEVICE_CLASS(klass);
2032 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2033 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2034
2035 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2036 dc->props = virtio_blk_pci_properties;
2037 k->realize = virtio_blk_pci_realize;
2038 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2039 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
2040 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
2041 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
2042 }
2043
2044 static void virtio_blk_pci_instance_init(Object *obj)
2045 {
2046 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
2047
2048 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2049 TYPE_VIRTIO_BLK);
2050 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
2051 "bootindex", &error_abort);
2052 }
2053
2054 static const VirtioPCIDeviceTypeInfo virtio_blk_pci_info = {
2055 .base_name = TYPE_VIRTIO_BLK_PCI,
2056 .generic_name = "virtio-blk-pci",
2057 .transitional_name = "virtio-blk-pci-transitional",
2058 .non_transitional_name = "virtio-blk-pci-non-transitional",
2059 .instance_size = sizeof(VirtIOBlkPCI),
2060 .instance_init = virtio_blk_pci_instance_init,
2061 .class_init = virtio_blk_pci_class_init,
2062 };
2063
2064 /* virtio-scsi-pci */
2065
2066 static Property virtio_scsi_pci_properties[] = {
2067 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
2068 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
2069 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
2070 DEV_NVECTORS_UNSPECIFIED),
2071 DEFINE_PROP_END_OF_LIST(),
2072 };
2073
2074 static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2075 {
2076 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev);
2077 DeviceState *vdev = DEVICE(&dev->vdev);
2078 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
2079 DeviceState *proxy = DEVICE(vpci_dev);
2080 char *bus_name;
2081
2082 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2083 vpci_dev->nvectors = vs->conf.num_queues + 3;
2084 }
2085
2086 /*
2087 * For command line compatibility, this sets the virtio-scsi-device bus
2088 * name as before.
2089 */
2090 if (proxy->id) {
2091 bus_name = g_strdup_printf("%s.0", proxy->id);
2092 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
2093 g_free(bus_name);
2094 }
2095
2096 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2097 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2098 }
2099
2100 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data)
2101 {
2102 DeviceClass *dc = DEVICE_CLASS(klass);
2103 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2104 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2105
2106 k->realize = virtio_scsi_pci_realize;
2107 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2108 dc->props = virtio_scsi_pci_properties;
2109 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2110 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
2111 pcidev_k->revision = 0x00;
2112 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
2113 }
2114
2115 static void virtio_scsi_pci_instance_init(Object *obj)
2116 {
2117 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
2118
2119 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2120 TYPE_VIRTIO_SCSI);
2121 }
2122
2123 static const VirtioPCIDeviceTypeInfo virtio_scsi_pci_info = {
2124 .base_name = TYPE_VIRTIO_SCSI_PCI,
2125 .generic_name = "virtio-scsi-pci",
2126 .transitional_name = "virtio-scsi-pci-transitional",
2127 .non_transitional_name = "virtio-scsi-pci-non-transitional",
2128 .instance_size = sizeof(VirtIOSCSIPCI),
2129 .instance_init = virtio_scsi_pci_instance_init,
2130 .class_init = virtio_scsi_pci_class_init,
2131 };
2132
2133 /* vhost-scsi-pci */
2134
2135 #ifdef CONFIG_VHOST_SCSI
2136 static Property vhost_scsi_pci_properties[] = {
2137 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
2138 DEV_NVECTORS_UNSPECIFIED),
2139 DEFINE_PROP_END_OF_LIST(),
2140 };
2141
2142 static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2143 {
2144 VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev);
2145 DeviceState *vdev = DEVICE(&dev->vdev);
2146 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
2147
2148 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2149 vpci_dev->nvectors = vs->conf.num_queues + 3;
2150 }
2151
2152 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2153 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2154 }
2155
2156 static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data)
2157 {
2158 DeviceClass *dc = DEVICE_CLASS(klass);
2159 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2160 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2161 k->realize = vhost_scsi_pci_realize;
2162 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2163 dc->props = vhost_scsi_pci_properties;
2164 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2165 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
2166 pcidev_k->revision = 0x00;
2167 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
2168 }
2169
2170 static void vhost_scsi_pci_instance_init(Object *obj)
2171 {
2172 VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj);
2173
2174 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2175 TYPE_VHOST_SCSI);
2176 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
2177 "bootindex", &error_abort);
2178 }
2179
2180 static const VirtioPCIDeviceTypeInfo vhost_scsi_pci_info = {
2181 .base_name = TYPE_VHOST_SCSI_PCI,
2182 .generic_name = "vhost-scsi-pci",
2183 .transitional_name = "vhost-scsi-pci-transitional",
2184 .non_transitional_name = "vhost-scsi-pci-non-transitional",
2185 .instance_size = sizeof(VHostSCSIPCI),
2186 .instance_init = vhost_scsi_pci_instance_init,
2187 .class_init = vhost_scsi_pci_class_init,
2188 };
2189 #endif
2190
2191 #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX)
2192 /* vhost-user-scsi-pci */
2193 static Property vhost_user_scsi_pci_properties[] = {
2194 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
2195 DEV_NVECTORS_UNSPECIFIED),
2196 DEFINE_PROP_END_OF_LIST(),
2197 };
2198
2199 static void vhost_user_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2200 {
2201 VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(vpci_dev);
2202 DeviceState *vdev = DEVICE(&dev->vdev);
2203 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
2204
2205 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2206 vpci_dev->nvectors = vs->conf.num_queues + 3;
2207 }
2208
2209 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2210 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2211 }
2212
2213 static void vhost_user_scsi_pci_class_init(ObjectClass *klass, void *data)
2214 {
2215 DeviceClass *dc = DEVICE_CLASS(klass);
2216 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2217 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2218 k->realize = vhost_user_scsi_pci_realize;
2219 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2220 dc->props = vhost_user_scsi_pci_properties;
2221 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2222 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
2223 pcidev_k->revision = 0x00;
2224 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
2225 }
2226
2227 static void vhost_user_scsi_pci_instance_init(Object *obj)
2228 {
2229 VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(obj);
2230
2231 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2232 TYPE_VHOST_USER_SCSI);
2233 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
2234 "bootindex", &error_abort);
2235 }
2236
2237 static const VirtioPCIDeviceTypeInfo vhost_user_scsi_pci_info = {
2238 .base_name = TYPE_VHOST_USER_SCSI_PCI,
2239 .generic_name = "vhost-user-scsi-pci",
2240 .transitional_name = "vhost-user-scsi-pci-transitional",
2241 .non_transitional_name = "vhost-user-scsi-pci-non-transitional",
2242 .instance_size = sizeof(VHostUserSCSIPCI),
2243 .instance_init = vhost_user_scsi_pci_instance_init,
2244 .class_init = vhost_user_scsi_pci_class_init,
2245 };
2246 #endif
2247
2248 /* virtio-serial-pci */
2249
2250 static void virtio_serial_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2251 {
2252 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev);
2253 DeviceState *vdev = DEVICE(&dev->vdev);
2254 DeviceState *proxy = DEVICE(vpci_dev);
2255 char *bus_name;
2256
2257 if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
2258 vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
2259 vpci_dev->class_code != PCI_CLASS_OTHERS) { /* qemu-kvm */
2260 vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER;
2261 }
2262
2263 /* backwards-compatibility with machines that were created with
2264 DEV_NVECTORS_UNSPECIFIED */
2265 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2266 vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1;
2267 }
2268
2269 /*
2270 * For command line compatibility, this sets the virtio-serial-device bus
2271 * name as before.
2272 */
2273 if (proxy->id) {
2274 bus_name = g_strdup_printf("%s.0", proxy->id);
2275 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
2276 g_free(bus_name);
2277 }
2278
2279 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2280 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2281 }
2282
2283 static Property virtio_serial_pci_properties[] = {
2284 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
2285 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
2286 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
2287 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
2288 DEFINE_PROP_END_OF_LIST(),
2289 };
2290
2291 static void virtio_serial_pci_class_init(ObjectClass *klass, void *data)
2292 {
2293 DeviceClass *dc = DEVICE_CLASS(klass);
2294 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2295 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2296 k->realize = virtio_serial_pci_realize;
2297 set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
2298 dc->props = virtio_serial_pci_properties;
2299 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2300 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE;
2301 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
2302 pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
2303 }
2304
2305 static void virtio_serial_pci_instance_init(Object *obj)
2306 {
2307 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj);
2308
2309 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2310 TYPE_VIRTIO_SERIAL);
2311 }
2312
2313 static const VirtioPCIDeviceTypeInfo virtio_serial_pci_info = {
2314 .base_name = TYPE_VIRTIO_SERIAL_PCI,
2315 .generic_name = "virtio-serial-pci",
2316 .transitional_name = "virtio-serial-pci-transitional",
2317 .non_transitional_name = "virtio-serial-pci-non-transitional",
2318 .instance_size = sizeof(VirtIOSerialPCI),
2319 .instance_init = virtio_serial_pci_instance_init,
2320 .class_init = virtio_serial_pci_class_init,
2321 };
2322
2323 /* virtio-net-pci */
2324
2325 static Property virtio_net_properties[] = {
2326 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
2327 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
2328 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
2329 DEFINE_PROP_END_OF_LIST(),
2330 };
2331
2332 static void virtio_net_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2333 {
2334 DeviceState *qdev = DEVICE(vpci_dev);
2335 VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev);
2336 DeviceState *vdev = DEVICE(&dev->vdev);
2337
2338 virtio_net_set_netclient_name(&dev->vdev, qdev->id,
2339 object_get_typename(OBJECT(qdev)));
2340 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2341 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2342 }
2343
2344 static void virtio_net_pci_class_init(ObjectClass *klass, void *data)
2345 {
2346 DeviceClass *dc = DEVICE_CLASS(klass);
2347 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
2348 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
2349
2350 k->romfile = "efi-virtio.rom";
2351 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2352 k->device_id = PCI_DEVICE_ID_VIRTIO_NET;
2353 k->revision = VIRTIO_PCI_ABI_VERSION;
2354 k->class_id = PCI_CLASS_NETWORK_ETHERNET;
2355 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
2356 dc->props = virtio_net_properties;
2357 vpciklass->realize = virtio_net_pci_realize;
2358 }
2359
2360 static void virtio_net_pci_instance_init(Object *obj)
2361 {
2362 VirtIONetPCI *dev = VIRTIO_NET_PCI(obj);
2363
2364 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2365 TYPE_VIRTIO_NET);
2366 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
2367 "bootindex", &error_abort);
2368 }
2369
2370 static const VirtioPCIDeviceTypeInfo virtio_net_pci_info = {
2371 .base_name = TYPE_VIRTIO_NET_PCI,
2372 .generic_name = "virtio-net-pci",
2373 .transitional_name = "virtio-net-pci-transitional",
2374 .non_transitional_name = "virtio-net-pci-non-transitional",
2375 .instance_size = sizeof(VirtIONetPCI),
2376 .instance_init = virtio_net_pci_instance_init,
2377 .class_init = virtio_net_pci_class_init,
2378 };
2379
2380 /* virtio-pci-bus */
2381
2382 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
2383 VirtIOPCIProxy *dev)
2384 {
2385 DeviceState *qdev = DEVICE(dev);
2386 char virtio_bus_name[] = "virtio-bus";
2387
2388 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_PCI_BUS, qdev,
2389 virtio_bus_name);
2390 }
2391
2392 static void virtio_pci_bus_class_init(ObjectClass *klass, void *data)
2393 {
2394 BusClass *bus_class = BUS_CLASS(klass);
2395 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
2396 bus_class->max_dev = 1;
2397 k->notify = virtio_pci_notify;
2398 k->save_config = virtio_pci_save_config;
2399 k->load_config = virtio_pci_load_config;
2400 k->save_queue = virtio_pci_save_queue;
2401 k->load_queue = virtio_pci_load_queue;
2402 k->save_extra_state = virtio_pci_save_extra_state;
2403 k->load_extra_state = virtio_pci_load_extra_state;
2404 k->has_extra_state = virtio_pci_has_extra_state;
2405 k->query_guest_notifiers = virtio_pci_query_guest_notifiers;
2406 k->set_guest_notifiers = virtio_pci_set_guest_notifiers;
2407 k->set_host_notifier_mr = virtio_pci_set_host_notifier_mr;
2408 k->vmstate_change = virtio_pci_vmstate_change;
2409 k->pre_plugged = virtio_pci_pre_plugged;
2410 k->device_plugged = virtio_pci_device_plugged;
2411 k->device_unplugged = virtio_pci_device_unplugged;
2412 k->query_nvectors = virtio_pci_query_nvectors;
2413 k->ioeventfd_enabled = virtio_pci_ioeventfd_enabled;
2414 k->ioeventfd_assign = virtio_pci_ioeventfd_assign;
2415 k->get_dma_as = virtio_pci_get_dma_as;
2416 }
2417
2418 static const TypeInfo virtio_pci_bus_info = {
2419 .name = TYPE_VIRTIO_PCI_BUS,
2420 .parent = TYPE_VIRTIO_BUS,
2421 .instance_size = sizeof(VirtioPCIBusState),
2422 .class_init = virtio_pci_bus_class_init,
2423 };
2424
2425 static void virtio_pci_register_types(void)
2426 {
2427 /* Base types: */
2428 type_register_static(&virtio_pci_bus_info);
2429 type_register_static(&virtio_pci_info);
2430
2431 /* Implementations: */
2432 virtio_pci_types_register(&virtio_blk_pci_info);
2433 virtio_pci_types_register(&virtio_scsi_pci_info);
2434 virtio_pci_types_register(&virtio_serial_pci_info);
2435 virtio_pci_types_register(&virtio_net_pci_info);
2436 #ifdef CONFIG_VHOST_SCSI
2437 virtio_pci_types_register(&vhost_scsi_pci_info);
2438 #endif
2439 #if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX)
2440 virtio_pci_types_register(&vhost_user_scsi_pci_info);
2441 #endif
2442 }
2443
2444 type_init(virtio_pci_register_types)
2445
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