?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge remote-tracking branch 'qemu/master'
[qemu/ar7.git] / hw / virtio / virtio-pci.c
blob09230c05df3c755689661629a91e84b7408cf4b7
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/virtio/virtio-balloon.h"
27 #include "hw/virtio/virtio-input.h"
28 #include "hw/pci/pci.h"
29 #include "qapi/error.h"
30 #include "qemu/error-report.h"
31 #include "hw/pci/msi.h"
32 #include "hw/pci/msix.h"
33 #include "hw/loader.h"
34 #include "sysemu/kvm.h"
35 #include "sysemu/block-backend.h"
36 #include "virtio-pci.h"
37 #include "qemu/range.h"
38 #include "hw/virtio/virtio-bus.h"
39 #include "qapi/visitor.h"
40
41 #define VIRTIO_PCI_REGION_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_present(dev))
42
43 #undef VIRTIO_PCI_CONFIG
44
45 /* The remaining space is defined by each driver as the per-driver
46 * configuration space */
47 #define VIRTIO_PCI_CONFIG_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_enabled(dev))
48
49 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
50 VirtIOPCIProxy *dev);
51 static void virtio_pci_reset(DeviceState *qdev);
52
53 /* virtio device */
54 /* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */
55 static inline VirtIOPCIProxy *to_virtio_pci_proxy(DeviceState *d)
56 {
57 return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
58 }
59
60 /* DeviceState to VirtIOPCIProxy. Note: used on datapath,
61 * be careful and test performance if you change this.
62 */
63 static inline VirtIOPCIProxy *to_virtio_pci_proxy_fast(DeviceState *d)
64 {
65 return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
66 }
67
68 static void virtio_pci_notify(DeviceState *d, uint16_t vector)
69 {
70 VirtIOPCIProxy *proxy = to_virtio_pci_proxy_fast(d);
71
72 if (msix_enabled(&proxy->pci_dev))
73 msix_notify(&proxy->pci_dev, vector);
74 else {
75 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
76 pci_set_irq(&proxy->pci_dev, atomic_read(&vdev->isr) & 1);
77 }
78 }
79
80 static void virtio_pci_save_config(DeviceState *d, QEMUFile *f)
81 {
82 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
83 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
84
85 pci_device_save(&proxy->pci_dev, f);
86 msix_save(&proxy->pci_dev, f);
87 if (msix_present(&proxy->pci_dev))
88 qemu_put_be16(f, vdev->config_vector);
89 }
90
91 static void virtio_pci_load_modern_queue_state(VirtIOPCIQueue *vq,
92 QEMUFile *f)
93 {
94 vq->num = qemu_get_be16(f);
95 vq->enabled = qemu_get_be16(f);
96 vq->desc[0] = qemu_get_be32(f);
97 vq->desc[1] = qemu_get_be32(f);
98 vq->avail[0] = qemu_get_be32(f);
99 vq->avail[1] = qemu_get_be32(f);
100 vq->used[0] = qemu_get_be32(f);
101 vq->used[1] = qemu_get_be32(f);
102 }
103
104 static bool virtio_pci_has_extra_state(DeviceState *d)
105 {
106 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
107
108 return proxy->flags & VIRTIO_PCI_FLAG_MIGRATE_EXTRA;
109 }
110
111 static int get_virtio_pci_modern_state(QEMUFile *f, void *pv, size_t size)
112 {
113 VirtIOPCIProxy *proxy = pv;
114 int i;
115
116 proxy->dfselect = qemu_get_be32(f);
117 proxy->gfselect = qemu_get_be32(f);
118 proxy->guest_features[0] = qemu_get_be32(f);
119 proxy->guest_features[1] = qemu_get_be32(f);
120 for (i = 0; i < VIRTIO_QUEUE_MAX; i++) {
121 virtio_pci_load_modern_queue_state(&proxy->vqs[i], f);
122 }
123
124 return 0;
125 }
126
127 static void virtio_pci_save_modern_queue_state(VirtIOPCIQueue *vq,
128 QEMUFile *f)
129 {
130 qemu_put_be16(f, vq->num);
131 qemu_put_be16(f, vq->enabled);
132 qemu_put_be32(f, vq->desc[0]);
133 qemu_put_be32(f, vq->desc[1]);
134 qemu_put_be32(f, vq->avail[0]);
135 qemu_put_be32(f, vq->avail[1]);
136 qemu_put_be32(f, vq->used[0]);
137 qemu_put_be32(f, vq->used[1]);
138 }
139
140 static void put_virtio_pci_modern_state(QEMUFile *f, void *pv, size_t size)
141 {
142 VirtIOPCIProxy *proxy = pv;
143 int i;
144
145 qemu_put_be32(f, proxy->dfselect);
146 qemu_put_be32(f, proxy->gfselect);
147 qemu_put_be32(f, proxy->guest_features[0]);
148 qemu_put_be32(f, proxy->guest_features[1]);
149 for (i = 0; i < VIRTIO_QUEUE_MAX; i++) {
150 virtio_pci_save_modern_queue_state(&proxy->vqs[i], f);
151 }
152 }
153
154 static const VMStateInfo vmstate_info_virtio_pci_modern_state = {
155 .name = "virtqueue_state",
156 .get = get_virtio_pci_modern_state,
157 .put = put_virtio_pci_modern_state,
158 };
159
160 static bool virtio_pci_modern_state_needed(void *opaque)
161 {
162 VirtIOPCIProxy *proxy = opaque;
163
164 return virtio_pci_modern(proxy);
165 }
166
167 static const VMStateDescription vmstate_virtio_pci_modern_state = {
168 .name = "virtio_pci/modern_state",
169 .version_id = 1,
170 .minimum_version_id = 1,
171 .needed = &virtio_pci_modern_state_needed,
172 .fields = (VMStateField[]) {
173 {
174 .name = "modern_state",
175 .version_id = 0,
176 .field_exists = NULL,
177 .size = 0,
178 .info = &vmstate_info_virtio_pci_modern_state,
179 .flags = VMS_SINGLE,
180 .offset = 0,
181 },
182 VMSTATE_END_OF_LIST()
183 }
184 };
185
186 static const VMStateDescription vmstate_virtio_pci = {
187 .name = "virtio_pci",
188 .version_id = 1,
189 .minimum_version_id = 1,
190 .minimum_version_id_old = 1,
191 .fields = (VMStateField[]) {
192 VMSTATE_END_OF_LIST()
193 },
194 .subsections = (const VMStateDescription*[]) {
195 &vmstate_virtio_pci_modern_state,
196 NULL
197 }
198 };
199
200 static void virtio_pci_save_extra_state(DeviceState *d, QEMUFile *f)
201 {
202 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
203
204 vmstate_save_state(f, &vmstate_virtio_pci, proxy, NULL);
205 }
206
207 static int virtio_pci_load_extra_state(DeviceState *d, QEMUFile *f)
208 {
209 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
210
211 return vmstate_load_state(f, &vmstate_virtio_pci, proxy, 1);
212 }
213
214 static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f)
215 {
216 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
217 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
218
219 if (msix_present(&proxy->pci_dev))
220 qemu_put_be16(f, virtio_queue_vector(vdev, n));
221 }
222
223 static int virtio_pci_load_config(DeviceState *d, QEMUFile *f)
224 {
225 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
226 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
227
228 int ret;
229 ret = pci_device_load(&proxy->pci_dev, f);
230 if (ret) {
231 return ret;
232 }
233 msix_unuse_all_vectors(&proxy->pci_dev);
234 msix_load(&proxy->pci_dev, f);
235 if (msix_present(&proxy->pci_dev)) {
236 qemu_get_be16s(f, &vdev->config_vector);
237 } else {
238 vdev->config_vector = VIRTIO_NO_VECTOR;
239 }
240 if (vdev->config_vector != VIRTIO_NO_VECTOR) {
241 return msix_vector_use(&proxy->pci_dev, vdev->config_vector);
242 }
243 return 0;
244 }
245
246 static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f)
247 {
248 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
249 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
250
251 uint16_t vector;
252 if (msix_present(&proxy->pci_dev)) {
253 qemu_get_be16s(f, &vector);
254 } else {
255 vector = VIRTIO_NO_VECTOR;
256 }
257 virtio_queue_set_vector(vdev, n, vector);
258 if (vector != VIRTIO_NO_VECTOR) {
259 return msix_vector_use(&proxy->pci_dev, vector);
260 }
261
262 return 0;
263 }
264
265 static bool virtio_pci_ioeventfd_enabled(DeviceState *d)
266 {
267 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
268
269 return (proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) != 0;
270 }
271
272 #define QEMU_VIRTIO_PCI_QUEUE_MEM_MULT 0x1000
273
274 static inline int virtio_pci_queue_mem_mult(struct VirtIOPCIProxy *proxy)
275 {
276 return (proxy->flags & VIRTIO_PCI_FLAG_PAGE_PER_VQ) ?
277 QEMU_VIRTIO_PCI_QUEUE_MEM_MULT : 4;
278 }
279
280 static int virtio_pci_ioeventfd_assign(DeviceState *d, EventNotifier *notifier,
281 int n, bool assign)
282 {
283 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
284 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
285 VirtQueue *vq = virtio_get_queue(vdev, n);
286 bool legacy = virtio_pci_legacy(proxy);
287 bool modern = virtio_pci_modern(proxy);
288 bool fast_mmio = kvm_ioeventfd_any_length_enabled();
289 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
290 MemoryRegion *modern_mr = &proxy->notify.mr;
291 MemoryRegion *modern_notify_mr = &proxy->notify_pio.mr;
292 MemoryRegion *legacy_mr = &proxy->bar;
293 hwaddr modern_addr = virtio_pci_queue_mem_mult(proxy) *
294 virtio_get_queue_index(vq);
295 hwaddr legacy_addr = VIRTIO_PCI_QUEUE_NOTIFY;
296
297 if (assign) {
298 if (modern) {
299 if (fast_mmio) {
300 memory_region_add_eventfd(modern_mr, modern_addr, 0,
301 false, n, notifier);
302 } else {
303 memory_region_add_eventfd(modern_mr, modern_addr, 2,
304 false, n, notifier);
305 }
306 if (modern_pio) {
307 memory_region_add_eventfd(modern_notify_mr, 0, 2,
308 true, n, notifier);
309 }
310 }
311 if (legacy) {
312 memory_region_add_eventfd(legacy_mr, legacy_addr, 2,
313 true, n, notifier);
314 }
315 } else {
316 if (modern) {
317 if (fast_mmio) {
318 memory_region_del_eventfd(modern_mr, modern_addr, 0,
319 false, n, notifier);
320 } else {
321 memory_region_del_eventfd(modern_mr, modern_addr, 2,
322 false, n, notifier);
323 }
324 if (modern_pio) {
325 memory_region_del_eventfd(modern_notify_mr, 0, 2,
326 true, n, notifier);
327 }
328 }
329 if (legacy) {
330 memory_region_del_eventfd(legacy_mr, legacy_addr, 2,
331 true, n, notifier);
332 }
333 }
334 return 0;
335 }
336
337 static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy)
338 {
339 virtio_bus_start_ioeventfd(&proxy->bus);
340 }
341
342 static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy)
343 {
344 virtio_bus_stop_ioeventfd(&proxy->bus);
345 }
346
347 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
348 {
349 VirtIOPCIProxy *proxy = opaque;
350 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
351 hwaddr pa;
352
353 switch (addr) {
354 case VIRTIO_PCI_GUEST_FEATURES:
355 /* Guest does not negotiate properly? We have to assume nothing. */
356 if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
357 val = virtio_bus_get_vdev_bad_features(&proxy->bus);
358 }
359 virtio_set_features(vdev, val);
360 break;
361 case VIRTIO_PCI_QUEUE_PFN:
362 pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
363 if (pa == 0) {
364 virtio_pci_reset(DEVICE(proxy));
365 }
366 else
367 virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
368 break;
369 case VIRTIO_PCI_QUEUE_SEL:
370 if (val < VIRTIO_QUEUE_MAX)
371 vdev->queue_sel = val;
372 break;
373 case VIRTIO_PCI_QUEUE_NOTIFY:
374 if (val < VIRTIO_QUEUE_MAX) {
375 virtio_queue_notify(vdev, val);
376 }
377 break;
378 case VIRTIO_PCI_STATUS:
379 if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
380 virtio_pci_stop_ioeventfd(proxy);
381 }
382
383 virtio_set_status(vdev, val & 0xFF);
384
385 if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
386 virtio_pci_start_ioeventfd(proxy);
387 }
388
389 if (vdev->status == 0) {
390 virtio_pci_reset(DEVICE(proxy));
391 }
392
393 /* Linux before 2.6.34 drives the device without enabling
394 the PCI device bus master bit. Enable it automatically
395 for the guest. This is a PCI spec violation but so is
396 initiating DMA with bus master bit clear. */
397 if (val == (VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER)) {
398 pci_default_write_config(&proxy->pci_dev, PCI_COMMAND,
399 proxy->pci_dev.config[PCI_COMMAND] |
400 PCI_COMMAND_MASTER, 1);
401 }
402 break;
403 case VIRTIO_MSI_CONFIG_VECTOR:
404 msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
405 /* Make it possible for guest to discover an error took place. */
406 if (msix_vector_use(&proxy->pci_dev, val) < 0)
407 val = VIRTIO_NO_VECTOR;
408 vdev->config_vector = val;
409 break;
410 case VIRTIO_MSI_QUEUE_VECTOR:
411 msix_vector_unuse(&proxy->pci_dev,
412 virtio_queue_vector(vdev, vdev->queue_sel));
413 /* Make it possible for guest to discover an error took place. */
414 if (msix_vector_use(&proxy->pci_dev, val) < 0)
415 val = VIRTIO_NO_VECTOR;
416 virtio_queue_set_vector(vdev, vdev->queue_sel, val);
417 break;
418 default:
419 error_report("%s: unexpected address 0x%x value 0x%x",
420 __func__, addr, val);
421 break;
422 }
423 }
424
425 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
426 {
427 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
428 uint32_t ret = 0xFFFFFFFF;
429
430 switch (addr) {
431 case VIRTIO_PCI_HOST_FEATURES:
432 ret = vdev->host_features;
433 break;
434 case VIRTIO_PCI_GUEST_FEATURES:
435 ret = vdev->guest_features;
436 break;
437 case VIRTIO_PCI_QUEUE_PFN:
438 ret = virtio_queue_get_addr(vdev, vdev->queue_sel)
439 >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
440 break;
441 case VIRTIO_PCI_QUEUE_NUM:
442 ret = virtio_queue_get_num(vdev, vdev->queue_sel);
443 break;
444 case VIRTIO_PCI_QUEUE_SEL:
445 ret = vdev->queue_sel;
446 break;
447 case VIRTIO_PCI_STATUS:
448 ret = vdev->status;
449 break;
450 case VIRTIO_PCI_ISR:
451 /* reading from the ISR also clears it. */
452 ret = atomic_xchg(&vdev->isr, 0);
453 pci_irq_deassert(&proxy->pci_dev);
454 break;
455 case VIRTIO_MSI_CONFIG_VECTOR:
456 ret = vdev->config_vector;
457 break;
458 case VIRTIO_MSI_QUEUE_VECTOR:
459 ret = virtio_queue_vector(vdev, vdev->queue_sel);
460 break;
461 default:
462 break;
463 }
464
465 return ret;
466 }
467
468 static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr,
469 unsigned size)
470 {
471 VirtIOPCIProxy *proxy = opaque;
472 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
473 uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev);
474 uint64_t val = 0;
475 if (addr < config) {
476 return virtio_ioport_read(proxy, addr);
477 }
478 addr -= config;
479
480 switch (size) {
481 case 1:
482 val = virtio_config_readb(vdev, addr);
483 break;
484 case 2:
485 val = virtio_config_readw(vdev, addr);
486 if (virtio_is_big_endian(vdev)) {
487 val = bswap16(val);
488 }
489 break;
490 case 4:
491 val = virtio_config_readl(vdev, addr);
492 if (virtio_is_big_endian(vdev)) {
493 val = bswap32(val);
494 }
495 break;
496 }
497 return val;
498 }
499
500 static void virtio_pci_config_write(void *opaque, hwaddr addr,
501 uint64_t val, unsigned size)
502 {
503 VirtIOPCIProxy *proxy = opaque;
504 uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev);
505 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
506 if (addr < config) {
507 virtio_ioport_write(proxy, addr, val);
508 return;
509 }
510 addr -= config;
511 /*
512 * Virtio-PCI is odd. Ioports are LE but config space is target native
513 * endian.
514 */
515 switch (size) {
516 case 1:
517 virtio_config_writeb(vdev, addr, val);
518 break;
519 case 2:
520 if (virtio_is_big_endian(vdev)) {
521 val = bswap16(val);
522 }
523 virtio_config_writew(vdev, addr, val);
524 break;
525 case 4:
526 if (virtio_is_big_endian(vdev)) {
527 val = bswap32(val);
528 }
529 virtio_config_writel(vdev, addr, val);
530 break;
531 }
532 }
533
534 static const MemoryRegionOps virtio_pci_config_ops = {
535 .read = virtio_pci_config_read,
536 .write = virtio_pci_config_write,
537 .impl = {
538 .min_access_size = 1,
539 .max_access_size = 4,
540 },
541 .endianness = DEVICE_LITTLE_ENDIAN,
542 };
543
544 /* Below are generic functions to do memcpy from/to an address space,
545 * without byteswaps, with input validation.
546 *
547 * As regular address_space_* APIs all do some kind of byteswap at least for
548 * some host/target combinations, we are forced to explicitly convert to a
549 * known-endianness integer value.
550 * It doesn't really matter which endian format to go through, so the code
551 * below selects the endian that causes the least amount of work on the given
552 * host.
553 *
554 * Note: host pointer must be aligned.
555 */
556 static
557 void virtio_address_space_write(AddressSpace *as, hwaddr addr,
558 const uint8_t *buf, int len)
559 {
560 uint32_t val;
561
562 /* address_space_* APIs assume an aligned address.
563 * As address is under guest control, handle illegal values.
564 */
565 addr &= ~(len - 1);
566
567 /* Make sure caller aligned buf properly */
568 assert(!(((uintptr_t)buf) & (len - 1)));
569
570 switch (len) {
571 case 1:
572 val = pci_get_byte(buf);
573 address_space_stb(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL);
574 break;
575 case 2:
576 val = pci_get_word(buf);
577 address_space_stw_le(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL);
578 break;
579 case 4:
580 val = pci_get_long(buf);
581 address_space_stl_le(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL);
582 break;
583 default:
584 /* As length is under guest control, handle illegal values. */
585 break;
586 }
587 }
588
589 static void
590 virtio_address_space_read(AddressSpace *as, hwaddr addr, uint8_t *buf, int len)
591 {
592 uint32_t val;
593
594 /* address_space_* APIs assume an aligned address.
595 * As address is under guest control, handle illegal values.
596 */
597 addr &= ~(len - 1);
598
599 /* Make sure caller aligned buf properly */
600 assert(!(((uintptr_t)buf) & (len - 1)));
601
602 switch (len) {
603 case 1:
604 val = address_space_ldub(as, addr, MEMTXATTRS_UNSPECIFIED, NULL);
605 pci_set_byte(buf, val);
606 break;
607 case 2:
608 val = address_space_lduw_le(as, addr, MEMTXATTRS_UNSPECIFIED, NULL);
609 pci_set_word(buf, val);
610 break;
611 case 4:
612 val = address_space_ldl_le(as, addr, MEMTXATTRS_UNSPECIFIED, NULL);
613 pci_set_long(buf, val);
614 break;
615 default:
616 /* As length is under guest control, handle illegal values. */
617 break;
618 }
619 }
620
621 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
622 uint32_t val, int len)
623 {
624 VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
625 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
626 struct virtio_pci_cfg_cap *cfg;
627
628 pci_default_write_config(pci_dev, address, val, len);
629
630 if (range_covers_byte(address, len, PCI_COMMAND) &&
631 !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
632 virtio_pci_stop_ioeventfd(proxy);
633 virtio_set_status(vdev, vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
634 }
635
636 if (proxy->config_cap &&
637 ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap,
638 pci_cfg_data),
639 sizeof cfg->pci_cfg_data)) {
640 uint32_t off;
641 uint32_t len;
642
643 cfg = (void *)(proxy->pci_dev.config + proxy->config_cap);
644 off = le32_to_cpu(cfg->cap.offset);
645 len = le32_to_cpu(cfg->cap.length);
646
647 if (len == 1 || len == 2 || len == 4) {
648 assert(len <= sizeof cfg->pci_cfg_data);
649 virtio_address_space_write(&proxy->modern_as, off,
650 cfg->pci_cfg_data, len);
651 }
652 }
653 }
654
655 static uint32_t virtio_read_config(PCIDevice *pci_dev,
656 uint32_t address, int len)
657 {
658 VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
659 struct virtio_pci_cfg_cap *cfg;
660
661 if (proxy->config_cap &&
662 ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap,
663 pci_cfg_data),
664 sizeof cfg->pci_cfg_data)) {
665 uint32_t off;
666 uint32_t len;
667
668 cfg = (void *)(proxy->pci_dev.config + proxy->config_cap);
669 off = le32_to_cpu(cfg->cap.offset);
670 len = le32_to_cpu(cfg->cap.length);
671
672 if (len == 1 || len == 2 || len == 4) {
673 assert(len <= sizeof cfg->pci_cfg_data);
674 virtio_address_space_read(&proxy->modern_as, off,
675 cfg->pci_cfg_data, len);
676 }
677 }
678
679 return pci_default_read_config(pci_dev, address, len);
680 }
681
682 static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy,
683 unsigned int queue_no,
684 unsigned int vector)
685 {
686 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
687 int ret;
688
689 if (irqfd->users == 0) {
690 ret = kvm_irqchip_add_msi_route(kvm_state, vector, &proxy->pci_dev);
691 if (ret < 0) {
692 return ret;
693 }
694 irqfd->virq = ret;
695 }
696 irqfd->users++;
697 return 0;
698 }
699
700 static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy,
701 unsigned int vector)
702 {
703 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
704 if (--irqfd->users == 0) {
705 kvm_irqchip_release_virq(kvm_state, irqfd->virq);
706 }
707 }
708
709 static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy,
710 unsigned int queue_no,
711 unsigned int vector)
712 {
713 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
714 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
715 VirtQueue *vq = virtio_get_queue(vdev, queue_no);
716 EventNotifier *n = virtio_queue_get_guest_notifier(vq);
717 return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, n, NULL, irqfd->virq);
718 }
719
720 static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy,
721 unsigned int queue_no,
722 unsigned int vector)
723 {
724 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
725 VirtQueue *vq = virtio_get_queue(vdev, queue_no);
726 EventNotifier *n = virtio_queue_get_guest_notifier(vq);
727 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
728 int ret;
729
730 ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, n, irqfd->virq);
731 assert(ret == 0);
732 }
733
734 static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
735 {
736 PCIDevice *dev = &proxy->pci_dev;
737 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
738 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
739 unsigned int vector;
740 int ret, queue_no;
741
742 for (queue_no = 0; queue_no < nvqs; queue_no++) {
743 if (!virtio_queue_get_num(vdev, queue_no)) {
744 break;
745 }
746 vector = virtio_queue_vector(vdev, queue_no);
747 if (vector >= msix_nr_vectors_allocated(dev)) {
748 continue;
749 }
750 ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector);
751 if (ret < 0) {
752 goto undo;
753 }
754 /* If guest supports masking, set up irqfd now.
755 * Otherwise, delay until unmasked in the frontend.
756 */
757 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
758 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
759 if (ret < 0) {
760 kvm_virtio_pci_vq_vector_release(proxy, vector);
761 goto undo;
762 }
763 }
764 }
765 return 0;
766
767 undo:
768 while (--queue_no >= 0) {
769 vector = virtio_queue_vector(vdev, queue_no);
770 if (vector >= msix_nr_vectors_allocated(dev)) {
771 continue;
772 }
773 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
774 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
775 }
776 kvm_virtio_pci_vq_vector_release(proxy, vector);
777 }
778 return ret;
779 }
780
781 static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
782 {
783 PCIDevice *dev = &proxy->pci_dev;
784 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
785 unsigned int vector;
786 int queue_no;
787 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
788
789 for (queue_no = 0; queue_no < nvqs; queue_no++) {
790 if (!virtio_queue_get_num(vdev, queue_no)) {
791 break;
792 }
793 vector = virtio_queue_vector(vdev, queue_no);
794 if (vector >= msix_nr_vectors_allocated(dev)) {
795 continue;
796 }
797 /* If guest supports masking, clean up irqfd now.
798 * Otherwise, it was cleaned when masked in the frontend.
799 */
800 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
801 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
802 }
803 kvm_virtio_pci_vq_vector_release(proxy, vector);
804 }
805 }
806
807 static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy,
808 unsigned int queue_no,
809 unsigned int vector,
810 MSIMessage msg)
811 {
812 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
813 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
814 VirtQueue *vq = virtio_get_queue(vdev, queue_no);
815 EventNotifier *n = virtio_queue_get_guest_notifier(vq);
816 VirtIOIRQFD *irqfd;
817 int ret = 0;
818
819 if (proxy->vector_irqfd) {
820 irqfd = &proxy->vector_irqfd[vector];
821 if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) {
822 ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg,
823 &proxy->pci_dev);
824 if (ret < 0) {
825 return ret;
826 }
827 kvm_irqchip_commit_routes(kvm_state);
828 }
829 }
830
831 /* If guest supports masking, irqfd is already setup, unmask it.
832 * Otherwise, set it up now.
833 */
834 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
835 k->guest_notifier_mask(vdev, queue_no, false);
836 /* Test after unmasking to avoid losing events. */
837 if (k->guest_notifier_pending &&
838 k->guest_notifier_pending(vdev, queue_no)) {
839 event_notifier_set(n);
840 }
841 } else {
842 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
843 }
844 return ret;
845 }
846
847 static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy,
848 unsigned int queue_no,
849 unsigned int vector)
850 {
851 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
852 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
853
854 /* If guest supports masking, keep irqfd but mask it.
855 * Otherwise, clean it up now.
856 */
857 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
858 k->guest_notifier_mask(vdev, queue_no, true);
859 } else {
860 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
861 }
862 }
863
864 static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector,
865 MSIMessage msg)
866 {
867 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
868 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
869 VirtQueue *vq = virtio_vector_first_queue(vdev, vector);
870 int ret, index, unmasked = 0;
871
872 while (vq) {
873 index = virtio_get_queue_index(vq);
874 if (!virtio_queue_get_num(vdev, index)) {
875 break;
876 }
877 if (index < proxy->nvqs_with_notifiers) {
878 ret = virtio_pci_vq_vector_unmask(proxy, index, vector, msg);
879 if (ret < 0) {
880 goto undo;
881 }
882 ++unmasked;
883 }
884 vq = virtio_vector_next_queue(vq);
885 }
886
887 return 0;
888
889 undo:
890 vq = virtio_vector_first_queue(vdev, vector);
891 while (vq && unmasked >= 0) {
892 index = virtio_get_queue_index(vq);
893 if (index < proxy->nvqs_with_notifiers) {
894 virtio_pci_vq_vector_mask(proxy, index, vector);
895 --unmasked;
896 }
897 vq = virtio_vector_next_queue(vq);
898 }
899 return ret;
900 }
901
902 static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector)
903 {
904 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
905 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
906 VirtQueue *vq = virtio_vector_first_queue(vdev, vector);
907 int index;
908
909 while (vq) {
910 index = virtio_get_queue_index(vq);
911 if (!virtio_queue_get_num(vdev, index)) {
912 break;
913 }
914 if (index < proxy->nvqs_with_notifiers) {
915 virtio_pci_vq_vector_mask(proxy, index, vector);
916 }
917 vq = virtio_vector_next_queue(vq);
918 }
919 }
920
921 static void virtio_pci_vector_poll(PCIDevice *dev,
922 unsigned int vector_start,
923 unsigned int vector_end)
924 {
925 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
926 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
927 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
928 int queue_no;
929 unsigned int vector;
930 EventNotifier *notifier;
931 VirtQueue *vq;
932
933 for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
934 if (!virtio_queue_get_num(vdev, queue_no)) {
935 break;
936 }
937 vector = virtio_queue_vector(vdev, queue_no);
938 if (vector < vector_start || vector >= vector_end ||
939 !msix_is_masked(dev, vector)) {
940 continue;
941 }
942 vq = virtio_get_queue(vdev, queue_no);
943 notifier = virtio_queue_get_guest_notifier(vq);
944 if (k->guest_notifier_pending) {
945 if (k->guest_notifier_pending(vdev, queue_no)) {
946 msix_set_pending(dev, vector);
947 }
948 } else if (event_notifier_test_and_clear(notifier)) {
949 msix_set_pending(dev, vector);
950 }
951 }
952 }
953
954 static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
955 bool with_irqfd)
956 {
957 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
958 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
959 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
960 VirtQueue *vq = virtio_get_queue(vdev, n);
961 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
962
963 if (assign) {
964 int r = event_notifier_init(notifier, 0);
965 if (r < 0) {
966 return r;
967 }
968 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
969 } else {
970 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
971 event_notifier_cleanup(notifier);
972 }
973
974 if (!msix_enabled(&proxy->pci_dev) &&
975 vdev->use_guest_notifier_mask &&
976 vdc->guest_notifier_mask) {
977 vdc->guest_notifier_mask(vdev, n, !assign);
978 }
979
980 return 0;
981 }
982
983 static bool virtio_pci_query_guest_notifiers(DeviceState *d)
984 {
985 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
986 return msix_enabled(&proxy->pci_dev);
987 }
988
989 static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
990 {
991 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
992 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
993 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
994 int r, n;
995 bool with_irqfd = msix_enabled(&proxy->pci_dev) &&
996 kvm_msi_via_irqfd_enabled();
997
998 nvqs = MIN(nvqs, VIRTIO_QUEUE_MAX);
999
1000 /* When deassigning, pass a consistent nvqs value
1001 * to avoid leaking notifiers.
1002 */
1003 assert(assign || nvqs == proxy->nvqs_with_notifiers);
1004
1005 proxy->nvqs_with_notifiers = nvqs;
1006
1007 /* Must unset vector notifier while guest notifier is still assigned */
1008 if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) {
1009 msix_unset_vector_notifiers(&proxy->pci_dev);
1010 if (proxy->vector_irqfd) {
1011 kvm_virtio_pci_vector_release(proxy, nvqs);
1012 g_free(proxy->vector_irqfd);
1013 proxy->vector_irqfd = NULL;
1014 }
1015 }
1016
1017 for (n = 0; n < nvqs; n++) {
1018 if (!virtio_queue_get_num(vdev, n)) {
1019 break;
1020 }
1021
1022 r = virtio_pci_set_guest_notifier(d, n, assign, with_irqfd);
1023 if (r < 0) {
1024 goto assign_error;
1025 }
1026 }
1027
1028 /* Must set vector notifier after guest notifier has been assigned */
1029 if ((with_irqfd || k->guest_notifier_mask) && assign) {
1030 if (with_irqfd) {
1031 proxy->vector_irqfd =
1032 g_malloc0(sizeof(*proxy->vector_irqfd) *
1033 msix_nr_vectors_allocated(&proxy->pci_dev));
1034 r = kvm_virtio_pci_vector_use(proxy, nvqs);
1035 if (r < 0) {
1036 goto assign_error;
1037 }
1038 }
1039 r = msix_set_vector_notifiers(&proxy->pci_dev,
1040 virtio_pci_vector_unmask,
1041 virtio_pci_vector_mask,
1042 virtio_pci_vector_poll);
1043 if (r < 0) {
1044 goto notifiers_error;
1045 }
1046 }
1047
1048 return 0;
1049
1050 notifiers_error:
1051 if (with_irqfd) {
1052 assert(assign);
1053 kvm_virtio_pci_vector_release(proxy, nvqs);
1054 }
1055
1056 assign_error:
1057 /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
1058 assert(assign);
1059 while (--n >= 0) {
1060 virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd);
1061 }
1062 return r;
1063 }
1064
1065 static void virtio_pci_vmstate_change(DeviceState *d, bool running)
1066 {
1067 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
1068 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1069
1070 if (running) {
1071 /* Old QEMU versions did not set bus master enable on status write.
1072 * Detect DRIVER set and enable it.
1073 */
1074 if ((proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION) &&
1075 (vdev->status & VIRTIO_CONFIG_S_DRIVER) &&
1076 !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
1077 pci_default_write_config(&proxy->pci_dev, PCI_COMMAND,
1078 proxy->pci_dev.config[PCI_COMMAND] |
1079 PCI_COMMAND_MASTER, 1);
1080 }
1081 virtio_pci_start_ioeventfd(proxy);
1082 } else {
1083 virtio_pci_stop_ioeventfd(proxy);
1084 }
1085 }
1086
1087 #ifdef CONFIG_VIRTFS
1088 static void virtio_9p_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
1089 {
1090 V9fsPCIState *dev = VIRTIO_9P_PCI(vpci_dev);
1091 DeviceState *vdev = DEVICE(&dev->vdev);
1092
1093 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1094 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
1095 }
1096
1097 static Property virtio_9p_pci_properties[] = {
1098 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1099 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1100 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
1101 DEFINE_PROP_END_OF_LIST(),
1102 };
1103
1104 static void virtio_9p_pci_class_init(ObjectClass *klass, void *data)
1105 {
1106 DeviceClass *dc = DEVICE_CLASS(klass);
1107 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1108 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1109
1110 k->realize = virtio_9p_pci_realize;
1111 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1112 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_9P;
1113 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1114 pcidev_k->class_id = 0x2;
1115 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1116 dc->props = virtio_9p_pci_properties;
1117 }
1118
1119 static void virtio_9p_pci_instance_init(Object *obj)
1120 {
1121 V9fsPCIState *dev = VIRTIO_9P_PCI(obj);
1122
1123 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1124 TYPE_VIRTIO_9P);
1125 }
1126
1127 static const TypeInfo virtio_9p_pci_info = {
1128 .name = TYPE_VIRTIO_9P_PCI,
1129 .parent = TYPE_VIRTIO_PCI,
1130 .instance_size = sizeof(V9fsPCIState),
1131 .instance_init = virtio_9p_pci_instance_init,
1132 .class_init = virtio_9p_pci_class_init,
1133 };
1134 #endif /* CONFIG_VIRTFS */
1135
1136 /*
1137 * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
1138 */
1139
1140 static int virtio_pci_query_nvectors(DeviceState *d)
1141 {
1142 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1143
1144 return proxy->nvectors;
1145 }
1146
1147 static AddressSpace *virtio_pci_get_dma_as(DeviceState *d)
1148 {
1149 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1150 PCIDevice *dev = &proxy->pci_dev;
1151
1152 return pci_get_address_space(dev);
1153 }
1154
1155 static int virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy,
1156 struct virtio_pci_cap *cap)
1157 {
1158 PCIDevice *dev = &proxy->pci_dev;
1159 int offset;
1160
1161 offset = pci_add_capability(dev, PCI_CAP_ID_VNDR, 0, cap->cap_len);
1162 assert(offset > 0);
1163
1164 assert(cap->cap_len >= sizeof *cap);
1165 memcpy(dev->config + offset + PCI_CAP_FLAGS, &cap->cap_len,
1166 cap->cap_len - PCI_CAP_FLAGS);
1167
1168 return offset;
1169 }
1170
1171 static uint64_t virtio_pci_common_read(void *opaque, hwaddr addr,
1172 unsigned size)
1173 {
1174 VirtIOPCIProxy *proxy = opaque;
1175 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1176 uint32_t val = 0;
1177 int i;
1178
1179 switch (addr) {
1180 case VIRTIO_PCI_COMMON_DFSELECT:
1181 val = proxy->dfselect;
1182 break;
1183 case VIRTIO_PCI_COMMON_DF:
1184 if (proxy->dfselect <= 1) {
1185 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
1186
1187 val = (vdev->host_features & ~vdc->legacy_features) >>
1188 (32 * proxy->dfselect);
1189 }
1190 break;
1191 case VIRTIO_PCI_COMMON_GFSELECT:
1192 val = proxy->gfselect;
1193 break;
1194 case VIRTIO_PCI_COMMON_GF:
1195 if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) {
1196 val = proxy->guest_features[proxy->gfselect];
1197 }
1198 break;
1199 case VIRTIO_PCI_COMMON_MSIX:
1200 val = vdev->config_vector;
1201 break;
1202 case VIRTIO_PCI_COMMON_NUMQ:
1203 for (i = 0; i < VIRTIO_QUEUE_MAX; ++i) {
1204 if (virtio_queue_get_num(vdev, i)) {
1205 val = i + 1;
1206 }
1207 }
1208 break;
1209 case VIRTIO_PCI_COMMON_STATUS:
1210 val = vdev->status;
1211 break;
1212 case VIRTIO_PCI_COMMON_CFGGENERATION:
1213 val = vdev->generation;
1214 break;
1215 case VIRTIO_PCI_COMMON_Q_SELECT:
1216 val = vdev->queue_sel;
1217 break;
1218 case VIRTIO_PCI_COMMON_Q_SIZE:
1219 val = virtio_queue_get_num(vdev, vdev->queue_sel);
1220 break;
1221 case VIRTIO_PCI_COMMON_Q_MSIX:
1222 val = virtio_queue_vector(vdev, vdev->queue_sel);
1223 break;
1224 case VIRTIO_PCI_COMMON_Q_ENABLE:
1225 val = proxy->vqs[vdev->queue_sel].enabled;
1226 break;
1227 case VIRTIO_PCI_COMMON_Q_NOFF:
1228 /* Simply map queues in order */
1229 val = vdev->queue_sel;
1230 break;
1231 case VIRTIO_PCI_COMMON_Q_DESCLO:
1232 val = proxy->vqs[vdev->queue_sel].desc[0];
1233 break;
1234 case VIRTIO_PCI_COMMON_Q_DESCHI:
1235 val = proxy->vqs[vdev->queue_sel].desc[1];
1236 break;
1237 case VIRTIO_PCI_COMMON_Q_AVAILLO:
1238 val = proxy->vqs[vdev->queue_sel].avail[0];
1239 break;
1240 case VIRTIO_PCI_COMMON_Q_AVAILHI:
1241 val = proxy->vqs[vdev->queue_sel].avail[1];
1242 break;
1243 case VIRTIO_PCI_COMMON_Q_USEDLO:
1244 val = proxy->vqs[vdev->queue_sel].used[0];
1245 break;
1246 case VIRTIO_PCI_COMMON_Q_USEDHI:
1247 val = proxy->vqs[vdev->queue_sel].used[1];
1248 break;
1249 default:
1250 val = 0;
1251 }
1252
1253 return val;
1254 }
1255
1256 static void virtio_pci_common_write(void *opaque, hwaddr addr,
1257 uint64_t val, unsigned size)
1258 {
1259 VirtIOPCIProxy *proxy = opaque;
1260 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1261
1262 switch (addr) {
1263 case VIRTIO_PCI_COMMON_DFSELECT:
1264 proxy->dfselect = val;
1265 break;
1266 case VIRTIO_PCI_COMMON_GFSELECT:
1267 proxy->gfselect = val;
1268 break;
1269 case VIRTIO_PCI_COMMON_GF:
1270 if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) {
1271 proxy->guest_features[proxy->gfselect] = val;
1272 virtio_set_features(vdev,
1273 (((uint64_t)proxy->guest_features[1]) << 32) |
1274 proxy->guest_features[0]);
1275 }
1276 break;
1277 case VIRTIO_PCI_COMMON_MSIX:
1278 msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
1279 /* Make it possible for guest to discover an error took place. */
1280 if (msix_vector_use(&proxy->pci_dev, val) < 0) {
1281 val = VIRTIO_NO_VECTOR;
1282 }
1283 vdev->config_vector = val;
1284 break;
1285 case VIRTIO_PCI_COMMON_STATUS:
1286 if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
1287 virtio_pci_stop_ioeventfd(proxy);
1288 }
1289
1290 virtio_set_status(vdev, val & 0xFF);
1291
1292 if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
1293 virtio_pci_start_ioeventfd(proxy);
1294 }
1295
1296 if (vdev->status == 0) {
1297 virtio_pci_reset(DEVICE(proxy));
1298 }
1299
1300 break;
1301 case VIRTIO_PCI_COMMON_Q_SELECT:
1302 if (val < VIRTIO_QUEUE_MAX) {
1303 vdev->queue_sel = val;
1304 }
1305 break;
1306 case VIRTIO_PCI_COMMON_Q_SIZE:
1307 proxy->vqs[vdev->queue_sel].num = val;
1308 break;
1309 case VIRTIO_PCI_COMMON_Q_MSIX:
1310 msix_vector_unuse(&proxy->pci_dev,
1311 virtio_queue_vector(vdev, vdev->queue_sel));
1312 /* Make it possible for guest to discover an error took place. */
1313 if (msix_vector_use(&proxy->pci_dev, val) < 0) {
1314 val = VIRTIO_NO_VECTOR;
1315 }
1316 virtio_queue_set_vector(vdev, vdev->queue_sel, val);
1317 break;
1318 case VIRTIO_PCI_COMMON_Q_ENABLE:
1319 virtio_queue_set_num(vdev, vdev->queue_sel,
1320 proxy->vqs[vdev->queue_sel].num);
1321 virtio_queue_set_rings(vdev, vdev->queue_sel,
1322 ((uint64_t)proxy->vqs[vdev->queue_sel].desc[1]) << 32 |
1323 proxy->vqs[vdev->queue_sel].desc[0],
1324 ((uint64_t)proxy->vqs[vdev->queue_sel].avail[1]) << 32 |
1325 proxy->vqs[vdev->queue_sel].avail[0],
1326 ((uint64_t)proxy->vqs[vdev->queue_sel].used[1]) << 32 |
1327 proxy->vqs[vdev->queue_sel].used[0]);
1328 proxy->vqs[vdev->queue_sel].enabled = 1;
1329 break;
1330 case VIRTIO_PCI_COMMON_Q_DESCLO:
1331 proxy->vqs[vdev->queue_sel].desc[0] = val;
1332 break;
1333 case VIRTIO_PCI_COMMON_Q_DESCHI:
1334 proxy->vqs[vdev->queue_sel].desc[1] = val;
1335 break;
1336 case VIRTIO_PCI_COMMON_Q_AVAILLO:
1337 proxy->vqs[vdev->queue_sel].avail[0] = val;
1338 break;
1339 case VIRTIO_PCI_COMMON_Q_AVAILHI:
1340 proxy->vqs[vdev->queue_sel].avail[1] = val;
1341 break;
1342 case VIRTIO_PCI_COMMON_Q_USEDLO:
1343 proxy->vqs[vdev->queue_sel].used[0] = val;
1344 break;
1345 case VIRTIO_PCI_COMMON_Q_USEDHI:
1346 proxy->vqs[vdev->queue_sel].used[1] = val;
1347 break;
1348 default:
1349 break;
1350 }
1351 }
1352
1353
1354 static uint64_t virtio_pci_notify_read(void *opaque, hwaddr addr,
1355 unsigned size)
1356 {
1357 return 0;
1358 }
1359
1360 static void virtio_pci_notify_write(void *opaque, hwaddr addr,
1361 uint64_t val, unsigned size)
1362 {
1363 VirtIODevice *vdev = opaque;
1364 VirtIOPCIProxy *proxy = VIRTIO_PCI(DEVICE(vdev)->parent_bus->parent);
1365 unsigned queue = addr / virtio_pci_queue_mem_mult(proxy);
1366
1367 if (queue < VIRTIO_QUEUE_MAX) {
1368 virtio_queue_notify(vdev, queue);
1369 }
1370 }
1371
1372 static void virtio_pci_notify_write_pio(void *opaque, hwaddr addr,
1373 uint64_t val, unsigned size)
1374 {
1375 VirtIODevice *vdev = opaque;
1376 unsigned queue = val;
1377
1378 if (queue < VIRTIO_QUEUE_MAX) {
1379 virtio_queue_notify(vdev, queue);
1380 }
1381 }
1382
1383 static uint64_t virtio_pci_isr_read(void *opaque, hwaddr addr,
1384 unsigned size)
1385 {
1386 VirtIOPCIProxy *proxy = opaque;
1387 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1388 uint64_t val = atomic_xchg(&vdev->isr, 0);
1389 pci_irq_deassert(&proxy->pci_dev);
1390
1391 return val;
1392 }
1393
1394 static void virtio_pci_isr_write(void *opaque, hwaddr addr,
1395 uint64_t val, unsigned size)
1396 {
1397 }
1398
1399 static uint64_t virtio_pci_device_read(void *opaque, hwaddr addr,
1400 unsigned size)
1401 {
1402 VirtIODevice *vdev = opaque;
1403 uint64_t val = 0;
1404
1405 switch (size) {
1406 case 1:
1407 val = virtio_config_modern_readb(vdev, addr);
1408 break;
1409 case 2:
1410 val = virtio_config_modern_readw(vdev, addr);
1411 break;
1412 case 4:
1413 val = virtio_config_modern_readl(vdev, addr);
1414 break;
1415 }
1416 return val;
1417 }
1418
1419 static void virtio_pci_device_write(void *opaque, hwaddr addr,
1420 uint64_t val, unsigned size)
1421 {
1422 VirtIODevice *vdev = opaque;
1423 switch (size) {
1424 case 1:
1425 virtio_config_modern_writeb(vdev, addr, val);
1426 break;
1427 case 2:
1428 virtio_config_modern_writew(vdev, addr, val);
1429 break;
1430 case 4:
1431 virtio_config_modern_writel(vdev, addr, val);
1432 break;
1433 }
1434 }
1435
1436 static void virtio_pci_modern_regions_init(VirtIOPCIProxy *proxy)
1437 {
1438 static const MemoryRegionOps common_ops = {
1439 .read = virtio_pci_common_read,
1440 .write = virtio_pci_common_write,
1441 .impl = {
1442 .min_access_size = 1,
1443 .max_access_size = 4,
1444 },
1445 .endianness = DEVICE_LITTLE_ENDIAN,
1446 };
1447 static const MemoryRegionOps isr_ops = {
1448 .read = virtio_pci_isr_read,
1449 .write = virtio_pci_isr_write,
1450 .impl = {
1451 .min_access_size = 1,
1452 .max_access_size = 4,
1453 },
1454 .endianness = DEVICE_LITTLE_ENDIAN,
1455 };
1456 static const MemoryRegionOps device_ops = {
1457 .read = virtio_pci_device_read,
1458 .write = virtio_pci_device_write,
1459 .impl = {
1460 .min_access_size = 1,
1461 .max_access_size = 4,
1462 },
1463 .endianness = DEVICE_LITTLE_ENDIAN,
1464 };
1465 static const MemoryRegionOps notify_ops = {
1466 .read = virtio_pci_notify_read,
1467 .write = virtio_pci_notify_write,
1468 .impl = {
1469 .min_access_size = 1,
1470 .max_access_size = 4,
1471 },
1472 .endianness = DEVICE_LITTLE_ENDIAN,
1473 };
1474 static const MemoryRegionOps notify_pio_ops = {
1475 .read = virtio_pci_notify_read,
1476 .write = virtio_pci_notify_write_pio,
1477 .impl = {
1478 .min_access_size = 1,
1479 .max_access_size = 4,
1480 },
1481 .endianness = DEVICE_LITTLE_ENDIAN,
1482 };
1483
1484
1485 memory_region_init_io(&proxy->common.mr, OBJECT(proxy),
1486 &common_ops,
1487 proxy,
1488 "virtio-pci-common",
1489 proxy->common.size);
1490
1491 memory_region_init_io(&proxy->isr.mr, OBJECT(proxy),
1492 &isr_ops,
1493 proxy,
1494 "virtio-pci-isr",
1495 proxy->isr.size);
1496
1497 memory_region_init_io(&proxy->device.mr, OBJECT(proxy),
1498 &device_ops,
1499 virtio_bus_get_device(&proxy->bus),
1500 "virtio-pci-device",
1501 proxy->device.size);
1502
1503 memory_region_init_io(&proxy->notify.mr, OBJECT(proxy),
1504 &notify_ops,
1505 virtio_bus_get_device(&proxy->bus),
1506 "virtio-pci-notify",
1507 proxy->notify.size);
1508
1509 memory_region_init_io(&proxy->notify_pio.mr, OBJECT(proxy),
1510 &notify_pio_ops,
1511 virtio_bus_get_device(&proxy->bus),
1512 "virtio-pci-notify-pio",
1513 proxy->notify_pio.size);
1514 }
1515
1516 static void virtio_pci_modern_region_map(VirtIOPCIProxy *proxy,
1517 VirtIOPCIRegion *region,
1518 struct virtio_pci_cap *cap,
1519 MemoryRegion *mr,
1520 uint8_t bar)
1521 {
1522 memory_region_add_subregion(mr, region->offset, &region->mr);
1523
1524 cap->cfg_type = region->type;
1525 cap->bar = bar;
1526 cap->offset = cpu_to_le32(region->offset);
1527 cap->length = cpu_to_le32(region->size);
1528 virtio_pci_add_mem_cap(proxy, cap);
1529
1530 }
1531
1532 static void virtio_pci_modern_mem_region_map(VirtIOPCIProxy *proxy,
1533 VirtIOPCIRegion *region,
1534 struct virtio_pci_cap *cap)
1535 {
1536 virtio_pci_modern_region_map(proxy, region, cap,
1537 &proxy->modern_bar, proxy->modern_mem_bar_idx);
1538 }
1539
1540 static void virtio_pci_modern_io_region_map(VirtIOPCIProxy *proxy,
1541 VirtIOPCIRegion *region,
1542 struct virtio_pci_cap *cap)
1543 {
1544 virtio_pci_modern_region_map(proxy, region, cap,
1545 &proxy->io_bar, proxy->modern_io_bar_idx);
1546 }
1547
1548 static void virtio_pci_modern_mem_region_unmap(VirtIOPCIProxy *proxy,
1549 VirtIOPCIRegion *region)
1550 {
1551 memory_region_del_subregion(&proxy->modern_bar,
1552 &region->mr);
1553 }
1554
1555 static void virtio_pci_modern_io_region_unmap(VirtIOPCIProxy *proxy,
1556 VirtIOPCIRegion *region)
1557 {
1558 memory_region_del_subregion(&proxy->io_bar,
1559 &region->mr);
1560 }
1561
1562 static void virtio_pci_pre_plugged(DeviceState *d, Error **errp)
1563 {
1564 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1565 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1566
1567 if (virtio_pci_modern(proxy)) {
1568 virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1);
1569 }
1570
1571 virtio_add_feature(&vdev->host_features, VIRTIO_F_BAD_FEATURE);
1572 }
1573
1574 /* This is called by virtio-bus just after the device is plugged. */
1575 static void virtio_pci_device_plugged(DeviceState *d, Error **errp)
1576 {
1577 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1578 VirtioBusState *bus = &proxy->bus;
1579 bool legacy = virtio_pci_legacy(proxy);
1580 bool modern;
1581 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
1582 uint8_t *config;
1583 uint32_t size;
1584 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1585
1586 /*
1587 * Virtio capabilities present without
1588 * VIRTIO_F_VERSION_1 confuses guests
1589 */
1590 if (!proxy->ignore_backend_features &&
1591 !virtio_has_feature(vdev->host_features, VIRTIO_F_VERSION_1)) {
1592 virtio_pci_disable_modern(proxy);
1593
1594 if (!legacy) {
1595 error_setg(errp, "Device doesn't support modern mode, and legacy"
1596 " mode is disabled");
1597 error_append_hint(errp, "Set disable-legacy to off\n");
1598
1599 return;
1600 }
1601 }
1602
1603 modern = virtio_pci_modern(proxy);
1604
1605 config = proxy->pci_dev.config;
1606 if (proxy->class_code) {
1607 pci_config_set_class(config, proxy->class_code);
1608 }
1609
1610 if (legacy) {
1611 if (virtio_host_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM)) {
1612 error_setg(errp, "VIRTIO_F_IOMMU_PLATFORM was supported by"
1613 "neither legacy nor transitional device.");
1614 return ;
1615 }
1616 /* legacy and transitional */
1617 pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID,
1618 pci_get_word(config + PCI_VENDOR_ID));
1619 pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus));
1620 } else {
1621 /* pure virtio-1.0 */
1622 pci_set_word(config + PCI_VENDOR_ID,
1623 PCI_VENDOR_ID_REDHAT_QUMRANET);
1624 pci_set_word(config + PCI_DEVICE_ID,
1625 0x1040 + virtio_bus_get_vdev_id(bus));
1626 pci_config_set_revision(config, 1);
1627 }
1628 config[PCI_INTERRUPT_PIN] = 1;
1629
1630
1631 if (modern) {
1632 struct virtio_pci_cap cap = {
1633 .cap_len = sizeof cap,
1634 };
1635 struct virtio_pci_notify_cap notify = {
1636 .cap.cap_len = sizeof notify,
1637 .notify_off_multiplier =
1638 cpu_to_le32(virtio_pci_queue_mem_mult(proxy)),
1639 };
1640 struct virtio_pci_cfg_cap cfg = {
1641 .cap.cap_len = sizeof cfg,
1642 .cap.cfg_type = VIRTIO_PCI_CAP_PCI_CFG,
1643 };
1644 struct virtio_pci_notify_cap notify_pio = {
1645 .cap.cap_len = sizeof notify,
1646 .notify_off_multiplier = cpu_to_le32(0x0),
1647 };
1648
1649 struct virtio_pci_cfg_cap *cfg_mask;
1650
1651 virtio_pci_modern_regions_init(proxy);
1652
1653 virtio_pci_modern_mem_region_map(proxy, &proxy->common, &cap);
1654 virtio_pci_modern_mem_region_map(proxy, &proxy->isr, &cap);
1655 virtio_pci_modern_mem_region_map(proxy, &proxy->device, &cap);
1656 virtio_pci_modern_mem_region_map(proxy, &proxy->notify, &notify.cap);
1657
1658 if (modern_pio) {
1659 memory_region_init(&proxy->io_bar, OBJECT(proxy),
1660 "virtio-pci-io", 0x4);
1661
1662 pci_register_bar(&proxy->pci_dev, proxy->modern_io_bar_idx,
1663 PCI_BASE_ADDRESS_SPACE_IO, &proxy->io_bar);
1664
1665 virtio_pci_modern_io_region_map(proxy, &proxy->notify_pio,
1666 &notify_pio.cap);
1667 }
1668
1669 pci_register_bar(&proxy->pci_dev, proxy->modern_mem_bar_idx,
1670 PCI_BASE_ADDRESS_SPACE_MEMORY |
1671 PCI_BASE_ADDRESS_MEM_PREFETCH |
1672 PCI_BASE_ADDRESS_MEM_TYPE_64,
1673 &proxy->modern_bar);
1674
1675 proxy->config_cap = virtio_pci_add_mem_cap(proxy, &cfg.cap);
1676 cfg_mask = (void *)(proxy->pci_dev.wmask + proxy->config_cap);
1677 pci_set_byte(&cfg_mask->cap.bar, ~0x0);
1678 pci_set_long((uint8_t *)&cfg_mask->cap.offset, ~0x0);
1679 pci_set_long((uint8_t *)&cfg_mask->cap.length, ~0x0);
1680 pci_set_long(cfg_mask->pci_cfg_data, ~0x0);
1681 }
1682
1683 if (proxy->nvectors) {
1684 int err = msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors,
1685 proxy->msix_bar_idx);
1686 if (err) {
1687 /* Notice when a system that supports MSIx can't initialize it. */
1688 if (err != -ENOTSUP) {
1689 error_report("unable to init msix vectors to %" PRIu32,
1690 proxy->nvectors);
1691 }
1692 proxy->nvectors = 0;
1693 }
1694 }
1695
1696 proxy->pci_dev.config_write = virtio_write_config;
1697 proxy->pci_dev.config_read = virtio_read_config;
1698
1699 if (legacy) {
1700 size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev)
1701 + virtio_bus_get_vdev_config_len(bus);
1702 size = pow2ceil(size);
1703
1704 memory_region_init_io(&proxy->bar, OBJECT(proxy),
1705 &virtio_pci_config_ops,
1706 proxy, "virtio-pci", size);
1707
1708 pci_register_bar(&proxy->pci_dev, proxy->legacy_io_bar_idx,
1709 PCI_BASE_ADDRESS_SPACE_IO, &proxy->bar);
1710 }
1711 }
1712
1713 static void virtio_pci_device_unplugged(DeviceState *d)
1714 {
1715 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1716 bool modern = virtio_pci_modern(proxy);
1717 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
1718
1719 virtio_pci_stop_ioeventfd(proxy);
1720
1721 if (modern) {
1722 virtio_pci_modern_mem_region_unmap(proxy, &proxy->common);
1723 virtio_pci_modern_mem_region_unmap(proxy, &proxy->isr);
1724 virtio_pci_modern_mem_region_unmap(proxy, &proxy->device);
1725 virtio_pci_modern_mem_region_unmap(proxy, &proxy->notify);
1726 if (modern_pio) {
1727 virtio_pci_modern_io_region_unmap(proxy, &proxy->notify_pio);
1728 }
1729 }
1730 }
1731
1732 static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
1733 {
1734 VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
1735 VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev);
1736 bool pcie_port = pci_bus_is_express(pci_dev->bus) &&
1737 !pci_bus_is_root(pci_dev->bus);
1738
1739 if (!kvm_has_many_ioeventfds()) {
1740 proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
1741 }
1742
1743 /*
1744 * virtio pci bar layout used by default.
1745 * subclasses can re-arrange things if needed.
1746 *
1747 * region 0 -- virtio legacy io bar
1748 * region 1 -- msi-x bar
1749 * region 4+5 -- virtio modern memory (64bit) bar
1750 *
1751 */
1752 proxy->legacy_io_bar_idx = 0;
1753 proxy->msix_bar_idx = 1;
1754 proxy->modern_io_bar_idx = 2;
1755 proxy->modern_mem_bar_idx = 4;
1756
1757 proxy->common.offset = 0x0;
1758 proxy->common.size = 0x1000;
1759 proxy->common.type = VIRTIO_PCI_CAP_COMMON_CFG;
1760
1761 proxy->isr.offset = 0x1000;
1762 proxy->isr.size = 0x1000;
1763 proxy->isr.type = VIRTIO_PCI_CAP_ISR_CFG;
1764
1765 proxy->device.offset = 0x2000;
1766 proxy->device.size = 0x1000;
1767 proxy->device.type = VIRTIO_PCI_CAP_DEVICE_CFG;
1768
1769 proxy->notify.offset = 0x3000;
1770 proxy->notify.size = virtio_pci_queue_mem_mult(proxy) * VIRTIO_QUEUE_MAX;
1771 proxy->notify.type = VIRTIO_PCI_CAP_NOTIFY_CFG;
1772
1773 proxy->notify_pio.offset = 0x0;
1774 proxy->notify_pio.size = 0x4;
1775 proxy->notify_pio.type = VIRTIO_PCI_CAP_NOTIFY_CFG;
1776
1777 /* subclasses can enforce modern, so do this unconditionally */
1778 memory_region_init(&proxy->modern_bar, OBJECT(proxy), "virtio-pci",
1779 /* PCI BAR regions must be powers of 2 */
1780 pow2ceil(proxy->notify.offset + proxy->notify.size));
1781
1782 memory_region_init_alias(&proxy->modern_cfg,
1783 OBJECT(proxy),
1784 "virtio-pci-cfg",
1785 &proxy->modern_bar,
1786 0,
1787 memory_region_size(&proxy->modern_bar));
1788
1789 address_space_init(&proxy->modern_as, &proxy->modern_cfg, "virtio-pci-cfg-as");
1790
1791 if (proxy->disable_legacy == ON_OFF_AUTO_AUTO) {
1792 proxy->disable_legacy = pcie_port ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF;
1793 }
1794
1795 if (!virtio_pci_modern(proxy) && !virtio_pci_legacy(proxy)) {
1796 error_setg(errp, "device cannot work as neither modern nor legacy mode"
1797 " is enabled");
1798 error_append_hint(errp, "Set either disable-modern or disable-legacy"
1799 " to off\n");
1800 return;
1801 }
1802
1803 if (pcie_port && pci_is_express(pci_dev)) {
1804 int pos;
1805
1806 pos = pcie_endpoint_cap_init(pci_dev, 0);
1807 assert(pos > 0);
1808
1809 pos = pci_add_capability(pci_dev, PCI_CAP_ID_PM, 0, PCI_PM_SIZEOF);
1810 assert(pos > 0);
1811
1812 /*
1813 * Indicates that this function complies with revision 1.2 of the
1814 * PCI Power Management Interface Specification.
1815 */
1816 pci_set_word(pci_dev->config + pos + PCI_PM_PMC, 0x3);
1817
1818 if (proxy->flags & VIRTIO_PCI_FLAG_ATS) {
1819 pcie_ats_init(pci_dev, 256);
1820 }
1821
1822 } else {
1823 /*
1824 * make future invocations of pci_is_express() return false
1825 * and pci_config_size() return PCI_CONFIG_SPACE_SIZE.
1826 */
1827 pci_dev->cap_present &= ~QEMU_PCI_CAP_EXPRESS;
1828 }
1829
1830 virtio_pci_bus_new(&proxy->bus, sizeof(proxy->bus), proxy);
1831 if (k->realize) {
1832 k->realize(proxy, errp);
1833 }
1834 }
1835
1836 static void virtio_pci_exit(PCIDevice *pci_dev)
1837 {
1838 VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
1839
1840 msix_uninit_exclusive_bar(pci_dev);
1841 address_space_destroy(&proxy->modern_as);
1842 }
1843
1844 static void virtio_pci_reset(DeviceState *qdev)
1845 {
1846 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
1847 VirtioBusState *bus = VIRTIO_BUS(&proxy->bus);
1848 int i;
1849
1850 virtio_pci_stop_ioeventfd(proxy);
1851 virtio_bus_reset(bus);
1852 msix_unuse_all_vectors(&proxy->pci_dev);
1853
1854 for (i = 0; i < VIRTIO_QUEUE_MAX; i++) {
1855 proxy->vqs[i].enabled = 0;
1856 }
1857 }
1858
1859 static Property virtio_pci_properties[] = {
1860 DEFINE_PROP_BIT("virtio-pci-bus-master-bug-migration", VirtIOPCIProxy, flags,
1861 VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT, false),
1862 DEFINE_PROP_ON_OFF_AUTO("disable-legacy", VirtIOPCIProxy, disable_legacy,
1863 ON_OFF_AUTO_AUTO),
1864 DEFINE_PROP_BOOL("disable-modern", VirtIOPCIProxy, disable_modern, false),
1865 DEFINE_PROP_BIT("migrate-extra", VirtIOPCIProxy, flags,
1866 VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT, true),
1867 DEFINE_PROP_BIT("modern-pio-notify", VirtIOPCIProxy, flags,
1868 VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT, false),
1869 DEFINE_PROP_BIT("x-disable-pcie", VirtIOPCIProxy, flags,
1870 VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT, false),
1871 DEFINE_PROP_BIT("page-per-vq", VirtIOPCIProxy, flags,
1872 VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT, false),
1873 DEFINE_PROP_BOOL("x-ignore-backend-features", VirtIOPCIProxy,
1874 ignore_backend_features, false),
1875 DEFINE_PROP_BIT("ats", VirtIOPCIProxy, flags,
1876 VIRTIO_PCI_FLAG_ATS_BIT, false),
1877 DEFINE_PROP_END_OF_LIST(),
1878 };
1879
1880 static void virtio_pci_dc_realize(DeviceState *qdev, Error **errp)
1881 {
1882 VirtioPCIClass *vpciklass = VIRTIO_PCI_GET_CLASS(qdev);
1883 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
1884 PCIDevice *pci_dev = &proxy->pci_dev;
1885
1886 if (!(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_PCIE) &&
1887 virtio_pci_modern(proxy)) {
1888 pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
1889 }
1890
1891 vpciklass->parent_dc_realize(qdev, errp);
1892 }
1893
1894 static void virtio_pci_class_init(ObjectClass *klass, void *data)
1895 {
1896 DeviceClass *dc = DEVICE_CLASS(klass);
1897 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1898 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
1899
1900 dc->props = virtio_pci_properties;
1901 k->realize = virtio_pci_realize;
1902 k->exit = virtio_pci_exit;
1903 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1904 k->revision = VIRTIO_PCI_ABI_VERSION;
1905 k->class_id = PCI_CLASS_OTHERS;
1906 vpciklass->parent_dc_realize = dc->realize;
1907 dc->realize = virtio_pci_dc_realize;
1908 dc->reset = virtio_pci_reset;
1909 }
1910
1911 static const TypeInfo virtio_pci_info = {
1912 .name = TYPE_VIRTIO_PCI,
1913 .parent = TYPE_PCI_DEVICE,
1914 .instance_size = sizeof(VirtIOPCIProxy),
1915 .class_init = virtio_pci_class_init,
1916 .class_size = sizeof(VirtioPCIClass),
1917 .abstract = true,
1918 };
1919
1920 /* virtio-blk-pci */
1921
1922 static Property virtio_blk_pci_properties[] = {
1923 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
1924 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1925 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1926 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
1927 DEFINE_PROP_END_OF_LIST(),
1928 };
1929
1930 static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
1931 {
1932 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
1933 DeviceState *vdev = DEVICE(&dev->vdev);
1934
1935 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1936 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
1937 }
1938
1939 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
1940 {
1941 DeviceClass *dc = DEVICE_CLASS(klass);
1942 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1943 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1944
1945 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1946 dc->props = virtio_blk_pci_properties;
1947 k->realize = virtio_blk_pci_realize;
1948 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1949 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
1950 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1951 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
1952 }
1953
1954 static void virtio_blk_pci_instance_init(Object *obj)
1955 {
1956 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
1957
1958 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1959 TYPE_VIRTIO_BLK);
1960 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread",
1961 &error_abort);
1962 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
1963 "bootindex", &error_abort);
1964 }
1965
1966 static const TypeInfo virtio_blk_pci_info = {
1967 .name = TYPE_VIRTIO_BLK_PCI,
1968 .parent = TYPE_VIRTIO_PCI,
1969 .instance_size = sizeof(VirtIOBlkPCI),
1970 .instance_init = virtio_blk_pci_instance_init,
1971 .class_init = virtio_blk_pci_class_init,
1972 };
1973
1974 /* virtio-scsi-pci */
1975
1976 static Property virtio_scsi_pci_properties[] = {
1977 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1978 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1979 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
1980 DEV_NVECTORS_UNSPECIFIED),
1981 DEFINE_PROP_END_OF_LIST(),
1982 };
1983
1984 static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
1985 {
1986 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev);
1987 DeviceState *vdev = DEVICE(&dev->vdev);
1988 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
1989 DeviceState *proxy = DEVICE(vpci_dev);
1990 char *bus_name;
1991
1992 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
1993 vpci_dev->nvectors = vs->conf.num_queues + 3;
1994 }
1995
1996 /*
1997 * For command line compatibility, this sets the virtio-scsi-device bus
1998 * name as before.
1999 */
2000 if (proxy->id) {
2001 bus_name = g_strdup_printf("%s.0", proxy->id);
2002 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
2003 g_free(bus_name);
2004 }
2005
2006 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2007 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2008 }
2009
2010 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data)
2011 {
2012 DeviceClass *dc = DEVICE_CLASS(klass);
2013 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2014 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2015
2016 k->realize = virtio_scsi_pci_realize;
2017 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2018 dc->props = virtio_scsi_pci_properties;
2019 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2020 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
2021 pcidev_k->revision = 0x00;
2022 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
2023 }
2024
2025 static void virtio_scsi_pci_instance_init(Object *obj)
2026 {
2027 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
2028
2029 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2030 TYPE_VIRTIO_SCSI);
2031 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev), "iothread",
2032 &error_abort);
2033 }
2034
2035 static const TypeInfo virtio_scsi_pci_info = {
2036 .name = TYPE_VIRTIO_SCSI_PCI,
2037 .parent = TYPE_VIRTIO_PCI,
2038 .instance_size = sizeof(VirtIOSCSIPCI),
2039 .instance_init = virtio_scsi_pci_instance_init,
2040 .class_init = virtio_scsi_pci_class_init,
2041 };
2042
2043 /* vhost-scsi-pci */
2044
2045 #ifdef CONFIG_VHOST_SCSI
2046 static Property vhost_scsi_pci_properties[] = {
2047 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
2048 DEV_NVECTORS_UNSPECIFIED),
2049 DEFINE_PROP_END_OF_LIST(),
2050 };
2051
2052 static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2053 {
2054 VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev);
2055 DeviceState *vdev = DEVICE(&dev->vdev);
2056 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
2057
2058 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2059 vpci_dev->nvectors = vs->conf.num_queues + 3;
2060 }
2061
2062 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2063 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2064 }
2065
2066 static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data)
2067 {
2068 DeviceClass *dc = DEVICE_CLASS(klass);
2069 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2070 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2071 k->realize = vhost_scsi_pci_realize;
2072 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2073 dc->props = vhost_scsi_pci_properties;
2074 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2075 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
2076 pcidev_k->revision = 0x00;
2077 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
2078 }
2079
2080 static void vhost_scsi_pci_instance_init(Object *obj)
2081 {
2082 VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj);
2083
2084 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2085 TYPE_VHOST_SCSI);
2086 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
2087 "bootindex", &error_abort);
2088 }
2089
2090 static const TypeInfo vhost_scsi_pci_info = {
2091 .name = TYPE_VHOST_SCSI_PCI,
2092 .parent = TYPE_VIRTIO_PCI,
2093 .instance_size = sizeof(VHostSCSIPCI),
2094 .instance_init = vhost_scsi_pci_instance_init,
2095 .class_init = vhost_scsi_pci_class_init,
2096 };
2097 #endif
2098
2099 /* vhost-vsock-pci */
2100
2101 #ifdef CONFIG_VHOST_VSOCK
2102 static Property vhost_vsock_pci_properties[] = {
2103 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
2104 DEFINE_PROP_END_OF_LIST(),
2105 };
2106
2107 static void vhost_vsock_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2108 {
2109 VHostVSockPCI *dev = VHOST_VSOCK_PCI(vpci_dev);
2110 DeviceState *vdev = DEVICE(&dev->vdev);
2111
2112 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2113 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2114 }
2115
2116 static void vhost_vsock_pci_class_init(ObjectClass *klass, void *data)
2117 {
2118 DeviceClass *dc = DEVICE_CLASS(klass);
2119 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2120 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2121 k->realize = vhost_vsock_pci_realize;
2122 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
2123 dc->props = vhost_vsock_pci_properties;
2124 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2125 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_VSOCK;
2126 pcidev_k->revision = 0x00;
2127 pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
2128 }
2129
2130 static void vhost_vsock_pci_instance_init(Object *obj)
2131 {
2132 VHostVSockPCI *dev = VHOST_VSOCK_PCI(obj);
2133
2134 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2135 TYPE_VHOST_VSOCK);
2136 }
2137
2138 static const TypeInfo vhost_vsock_pci_info = {
2139 .name = TYPE_VHOST_VSOCK_PCI,
2140 .parent = TYPE_VIRTIO_PCI,
2141 .instance_size = sizeof(VHostVSockPCI),
2142 .instance_init = vhost_vsock_pci_instance_init,
2143 .class_init = vhost_vsock_pci_class_init,
2144 };
2145 #endif
2146
2147 /* virtio-balloon-pci */
2148
2149 static Property virtio_balloon_pci_properties[] = {
2150 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
2151 DEFINE_PROP_END_OF_LIST(),
2152 };
2153
2154 static void virtio_balloon_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2155 {
2156 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev);
2157 DeviceState *vdev = DEVICE(&dev->vdev);
2158
2159 if (vpci_dev->class_code != PCI_CLASS_OTHERS &&
2160 vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */
2161 vpci_dev->class_code = PCI_CLASS_OTHERS;
2162 }
2163
2164 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2165 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2166 }
2167
2168 static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data)
2169 {
2170 DeviceClass *dc = DEVICE_CLASS(klass);
2171 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2172 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2173 k->realize = virtio_balloon_pci_realize;
2174 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
2175 dc->props = virtio_balloon_pci_properties;
2176 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2177 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON;
2178 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
2179 pcidev_k->class_id = PCI_CLASS_OTHERS;
2180 }
2181
2182 static void virtio_balloon_pci_instance_init(Object *obj)
2183 {
2184 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj);
2185
2186 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2187 TYPE_VIRTIO_BALLOON);
2188 object_property_add_alias(obj, "guest-stats", OBJECT(&dev->vdev),
2189 "guest-stats", &error_abort);
2190 object_property_add_alias(obj, "guest-stats-polling-interval",
2191 OBJECT(&dev->vdev),
2192 "guest-stats-polling-interval", &error_abort);
2193 }
2194
2195 static const TypeInfo virtio_balloon_pci_info = {
2196 .name = TYPE_VIRTIO_BALLOON_PCI,
2197 .parent = TYPE_VIRTIO_PCI,
2198 .instance_size = sizeof(VirtIOBalloonPCI),
2199 .instance_init = virtio_balloon_pci_instance_init,
2200 .class_init = virtio_balloon_pci_class_init,
2201 };
2202
2203 /* virtio-serial-pci */
2204
2205 static void virtio_serial_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2206 {
2207 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev);
2208 DeviceState *vdev = DEVICE(&dev->vdev);
2209 DeviceState *proxy = DEVICE(vpci_dev);
2210 char *bus_name;
2211
2212 if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
2213 vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
2214 vpci_dev->class_code != PCI_CLASS_OTHERS) { /* qemu-kvm */
2215 vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER;
2216 }
2217
2218 /* backwards-compatibility with machines that were created with
2219 DEV_NVECTORS_UNSPECIFIED */
2220 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2221 vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1;
2222 }
2223
2224 /*
2225 * For command line compatibility, this sets the virtio-serial-device bus
2226 * name as before.
2227 */
2228 if (proxy->id) {
2229 bus_name = g_strdup_printf("%s.0", proxy->id);
2230 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
2231 g_free(bus_name);
2232 }
2233
2234 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2235 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2236 }
2237
2238 static Property virtio_serial_pci_properties[] = {
2239 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
2240 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
2241 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
2242 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
2243 DEFINE_PROP_END_OF_LIST(),
2244 };
2245
2246 static void virtio_serial_pci_class_init(ObjectClass *klass, void *data)
2247 {
2248 DeviceClass *dc = DEVICE_CLASS(klass);
2249 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2250 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2251 k->realize = virtio_serial_pci_realize;
2252 set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
2253 dc->props = virtio_serial_pci_properties;
2254 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2255 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE;
2256 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
2257 pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
2258 }
2259
2260 static void virtio_serial_pci_instance_init(Object *obj)
2261 {
2262 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj);
2263
2264 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2265 TYPE_VIRTIO_SERIAL);
2266 }
2267
2268 static const TypeInfo virtio_serial_pci_info = {
2269 .name = TYPE_VIRTIO_SERIAL_PCI,
2270 .parent = TYPE_VIRTIO_PCI,
2271 .instance_size = sizeof(VirtIOSerialPCI),
2272 .instance_init = virtio_serial_pci_instance_init,
2273 .class_init = virtio_serial_pci_class_init,
2274 };
2275
2276 /* virtio-net-pci */
2277
2278 static Property virtio_net_properties[] = {
2279 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
2280 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
2281 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
2282 DEFINE_PROP_END_OF_LIST(),
2283 };
2284
2285 static void virtio_net_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2286 {
2287 DeviceState *qdev = DEVICE(vpci_dev);
2288 VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev);
2289 DeviceState *vdev = DEVICE(&dev->vdev);
2290
2291 virtio_net_set_netclient_name(&dev->vdev, qdev->id,
2292 object_get_typename(OBJECT(qdev)));
2293 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2294 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2295 }
2296
2297 static void virtio_net_pci_class_init(ObjectClass *klass, void *data)
2298 {
2299 DeviceClass *dc = DEVICE_CLASS(klass);
2300 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
2301 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
2302
2303 k->romfile = "efi-virtio.rom";
2304 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2305 k->device_id = PCI_DEVICE_ID_VIRTIO_NET;
2306 k->revision = VIRTIO_PCI_ABI_VERSION;
2307 k->class_id = PCI_CLASS_NETWORK_ETHERNET;
2308 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
2309 dc->props = virtio_net_properties;
2310 vpciklass->realize = virtio_net_pci_realize;
2311 }
2312
2313 static void virtio_net_pci_instance_init(Object *obj)
2314 {
2315 VirtIONetPCI *dev = VIRTIO_NET_PCI(obj);
2316
2317 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2318 TYPE_VIRTIO_NET);
2319 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
2320 "bootindex", &error_abort);
2321 }
2322
2323 static const TypeInfo virtio_net_pci_info = {
2324 .name = TYPE_VIRTIO_NET_PCI,
2325 .parent = TYPE_VIRTIO_PCI,
2326 .instance_size = sizeof(VirtIONetPCI),
2327 .instance_init = virtio_net_pci_instance_init,
2328 .class_init = virtio_net_pci_class_init,
2329 };
2330
2331 /* virtio-rng-pci */
2332
2333 static void virtio_rng_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2334 {
2335 VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev);
2336 DeviceState *vdev = DEVICE(&vrng->vdev);
2337 Error *err = NULL;
2338
2339 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2340 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
2341 if (err) {
2342 error_propagate(errp, err);
2343 return;
2344 }
2345
2346 object_property_set_link(OBJECT(vrng),
2347 OBJECT(vrng->vdev.conf.rng), "rng",
2348 NULL);
2349 }
2350
2351 static void virtio_rng_pci_class_init(ObjectClass *klass, void *data)
2352 {
2353 DeviceClass *dc = DEVICE_CLASS(klass);
2354 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2355 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2356
2357 k->realize = virtio_rng_pci_realize;
2358 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
2359
2360 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2361 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG;
2362 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
2363 pcidev_k->class_id = PCI_CLASS_OTHERS;
2364 }
2365
2366 static void virtio_rng_initfn(Object *obj)
2367 {
2368 VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj);
2369
2370 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2371 TYPE_VIRTIO_RNG);
2372 object_property_add_alias(obj, "rng", OBJECT(&dev->vdev), "rng",
2373 &error_abort);
2374 }
2375
2376 static const TypeInfo virtio_rng_pci_info = {
2377 .name = TYPE_VIRTIO_RNG_PCI,
2378 .parent = TYPE_VIRTIO_PCI,
2379 .instance_size = sizeof(VirtIORngPCI),
2380 .instance_init = virtio_rng_initfn,
2381 .class_init = virtio_rng_pci_class_init,
2382 };
2383
2384 /* virtio-input-pci */
2385
2386 static Property virtio_input_pci_properties[] = {
2387 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
2388 DEFINE_PROP_END_OF_LIST(),
2389 };
2390
2391 static void virtio_input_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2392 {
2393 VirtIOInputPCI *vinput = VIRTIO_INPUT_PCI(vpci_dev);
2394 DeviceState *vdev = DEVICE(&vinput->vdev);
2395
2396 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2397 virtio_pci_force_virtio_1(vpci_dev);
2398 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2399 }
2400
2401 static void virtio_input_pci_class_init(ObjectClass *klass, void *data)
2402 {
2403 DeviceClass *dc = DEVICE_CLASS(klass);
2404 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2405 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2406
2407 dc->props = virtio_input_pci_properties;
2408 k->realize = virtio_input_pci_realize;
2409 set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
2410
2411 pcidev_k->class_id = PCI_CLASS_INPUT_OTHER;
2412 }
2413
2414 static void virtio_input_hid_kbd_pci_class_init(ObjectClass *klass, void *data)
2415 {
2416 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2417
2418 pcidev_k->class_id = PCI_CLASS_INPUT_KEYBOARD;
2419 }
2420
2421 static void virtio_input_hid_mouse_pci_class_init(ObjectClass *klass,
2422 void *data)
2423 {
2424 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2425
2426 pcidev_k->class_id = PCI_CLASS_INPUT_MOUSE;
2427 }
2428
2429 static void virtio_keyboard_initfn(Object *obj)
2430 {
2431 VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj);
2432
2433 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2434 TYPE_VIRTIO_KEYBOARD);
2435 }
2436
2437 static void virtio_mouse_initfn(Object *obj)
2438 {
2439 VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj);
2440
2441 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2442 TYPE_VIRTIO_MOUSE);
2443 }
2444
2445 static void virtio_tablet_initfn(Object *obj)
2446 {
2447 VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj);
2448
2449 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2450 TYPE_VIRTIO_TABLET);
2451 }
2452
2453 static const TypeInfo virtio_input_pci_info = {
2454 .name = TYPE_VIRTIO_INPUT_PCI,
2455 .parent = TYPE_VIRTIO_PCI,
2456 .instance_size = sizeof(VirtIOInputPCI),
2457 .class_init = virtio_input_pci_class_init,
2458 .abstract = true,
2459 };
2460
2461 static const TypeInfo virtio_input_hid_pci_info = {
2462 .name = TYPE_VIRTIO_INPUT_HID_PCI,
2463 .parent = TYPE_VIRTIO_INPUT_PCI,
2464 .instance_size = sizeof(VirtIOInputHIDPCI),
2465 .abstract = true,
2466 };
2467
2468 static const TypeInfo virtio_keyboard_pci_info = {
2469 .name = TYPE_VIRTIO_KEYBOARD_PCI,
2470 .parent = TYPE_VIRTIO_INPUT_HID_PCI,
2471 .class_init = virtio_input_hid_kbd_pci_class_init,
2472 .instance_size = sizeof(VirtIOInputHIDPCI),
2473 .instance_init = virtio_keyboard_initfn,
2474 };
2475
2476 static const TypeInfo virtio_mouse_pci_info = {
2477 .name = TYPE_VIRTIO_MOUSE_PCI,
2478 .parent = TYPE_VIRTIO_INPUT_HID_PCI,
2479 .class_init = virtio_input_hid_mouse_pci_class_init,
2480 .instance_size = sizeof(VirtIOInputHIDPCI),
2481 .instance_init = virtio_mouse_initfn,
2482 };
2483
2484 static const TypeInfo virtio_tablet_pci_info = {
2485 .name = TYPE_VIRTIO_TABLET_PCI,
2486 .parent = TYPE_VIRTIO_INPUT_HID_PCI,
2487 .instance_size = sizeof(VirtIOInputHIDPCI),
2488 .instance_init = virtio_tablet_initfn,
2489 };
2490
2491 #ifdef CONFIG_LINUX
2492 static void virtio_host_initfn(Object *obj)
2493 {
2494 VirtIOInputHostPCI *dev = VIRTIO_INPUT_HOST_PCI(obj);
2495
2496 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2497 TYPE_VIRTIO_INPUT_HOST);
2498 }
2499
2500 static const TypeInfo virtio_host_pci_info = {
2501 .name = TYPE_VIRTIO_INPUT_HOST_PCI,
2502 .parent = TYPE_VIRTIO_INPUT_PCI,
2503 .instance_size = sizeof(VirtIOInputHostPCI),
2504 .instance_init = virtio_host_initfn,
2505 };
2506 #endif
2507
2508 /* virtio-pci-bus */
2509
2510 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
2511 VirtIOPCIProxy *dev)
2512 {
2513 DeviceState *qdev = DEVICE(dev);
2514 char virtio_bus_name[] = "virtio-bus";
2515
2516 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_PCI_BUS, qdev,
2517 virtio_bus_name);
2518 }
2519
2520 static void virtio_pci_bus_class_init(ObjectClass *klass, void *data)
2521 {
2522 BusClass *bus_class = BUS_CLASS(klass);
2523 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
2524 bus_class->max_dev = 1;
2525 k->notify = virtio_pci_notify;
2526 k->save_config = virtio_pci_save_config;
2527 k->load_config = virtio_pci_load_config;
2528 k->save_queue = virtio_pci_save_queue;
2529 k->load_queue = virtio_pci_load_queue;
2530 k->save_extra_state = virtio_pci_save_extra_state;
2531 k->load_extra_state = virtio_pci_load_extra_state;
2532 k->has_extra_state = virtio_pci_has_extra_state;
2533 k->query_guest_notifiers = virtio_pci_query_guest_notifiers;
2534 k->set_guest_notifiers = virtio_pci_set_guest_notifiers;
2535 k->vmstate_change = virtio_pci_vmstate_change;
2536 k->pre_plugged = virtio_pci_pre_plugged;
2537 k->device_plugged = virtio_pci_device_plugged;
2538 k->device_unplugged = virtio_pci_device_unplugged;
2539 k->query_nvectors = virtio_pci_query_nvectors;
2540 k->ioeventfd_enabled = virtio_pci_ioeventfd_enabled;
2541 k->ioeventfd_assign = virtio_pci_ioeventfd_assign;
2542 k->get_dma_as = virtio_pci_get_dma_as;
2543 }
2544
2545 static const TypeInfo virtio_pci_bus_info = {
2546 .name = TYPE_VIRTIO_PCI_BUS,
2547 .parent = TYPE_VIRTIO_BUS,
2548 .instance_size = sizeof(VirtioPCIBusState),
2549 .class_init = virtio_pci_bus_class_init,
2550 };
2551
2552 static void virtio_pci_register_types(void)
2553 {
2554 type_register_static(&virtio_rng_pci_info);
2555 type_register_static(&virtio_input_pci_info);
2556 type_register_static(&virtio_input_hid_pci_info);
2557 type_register_static(&virtio_keyboard_pci_info);
2558 type_register_static(&virtio_mouse_pci_info);
2559 type_register_static(&virtio_tablet_pci_info);
2560 #ifdef CONFIG_LINUX
2561 type_register_static(&virtio_host_pci_info);
2562 #endif
2563 type_register_static(&virtio_pci_bus_info);
2564 type_register_static(&virtio_pci_info);
2565 #ifdef CONFIG_VIRTFS
2566 type_register_static(&virtio_9p_pci_info);
2567 #endif
2568 type_register_static(&virtio_blk_pci_info);
2569 type_register_static(&virtio_scsi_pci_info);
2570 type_register_static(&virtio_balloon_pci_info);
2571 type_register_static(&virtio_serial_pci_info);
2572 type_register_static(&virtio_net_pci_info);
2573 #ifdef CONFIG_VHOST_SCSI
2574 type_register_static(&vhost_scsi_pci_info);
2575 #endif
2576 #ifdef CONFIG_VHOST_VSOCK
2577 type_register_static(&vhost_vsock_pci_info);
2578 #endif
2579 }
2580
2581 type_init(virtio_pci_register_types)
AR7 emulation for QEMU