Merge remote-tracking branch 'remotes/stefanha/tags/tracing-pull-request' into staging
[qemu.git] / hw / virtio / virtio-pci.c
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 VMStateField *field)
113 {
114 VirtIOPCIProxy *proxy = pv;
115 int i;
116
117 proxy->dfselect = qemu_get_be32(f);
118 proxy->gfselect = qemu_get_be32(f);
119 proxy->guest_features[0] = qemu_get_be32(f);
120 proxy->guest_features[1] = qemu_get_be32(f);
121 for (i = 0; i < VIRTIO_QUEUE_MAX; i++) {
122 virtio_pci_load_modern_queue_state(&proxy->vqs[i], f);
123 }
124
125 return 0;
126 }
127
128 static void virtio_pci_save_modern_queue_state(VirtIOPCIQueue *vq,
129 QEMUFile *f)
130 {
131 qemu_put_be16(f, vq->num);
132 qemu_put_be16(f, vq->enabled);
133 qemu_put_be32(f, vq->desc[0]);
134 qemu_put_be32(f, vq->desc[1]);
135 qemu_put_be32(f, vq->avail[0]);
136 qemu_put_be32(f, vq->avail[1]);
137 qemu_put_be32(f, vq->used[0]);
138 qemu_put_be32(f, vq->used[1]);
139 }
140
141 static int put_virtio_pci_modern_state(QEMUFile *f, void *pv, size_t size,
142 VMStateField *field, QJSON *vmdesc)
143 {
144 VirtIOPCIProxy *proxy = pv;
145 int i;
146
147 qemu_put_be32(f, proxy->dfselect);
148 qemu_put_be32(f, proxy->gfselect);
149 qemu_put_be32(f, proxy->guest_features[0]);
150 qemu_put_be32(f, proxy->guest_features[1]);
151 for (i = 0; i < VIRTIO_QUEUE_MAX; i++) {
152 virtio_pci_save_modern_queue_state(&proxy->vqs[i], f);
153 }
154
155 return 0;
156 }
157
158 static const VMStateInfo vmstate_info_virtio_pci_modern_state = {
159 .name = "virtqueue_state",
160 .get = get_virtio_pci_modern_state,
161 .put = put_virtio_pci_modern_state,
162 };
163
164 static bool virtio_pci_modern_state_needed(void *opaque)
165 {
166 VirtIOPCIProxy *proxy = opaque;
167
168 return virtio_pci_modern(proxy);
169 }
170
171 static const VMStateDescription vmstate_virtio_pci_modern_state = {
172 .name = "virtio_pci/modern_state",
173 .version_id = 1,
174 .minimum_version_id = 1,
175 .needed = &virtio_pci_modern_state_needed,
176 .fields = (VMStateField[]) {
177 {
178 .name = "modern_state",
179 .version_id = 0,
180 .field_exists = NULL,
181 .size = 0,
182 .info = &vmstate_info_virtio_pci_modern_state,
183 .flags = VMS_SINGLE,
184 .offset = 0,
185 },
186 VMSTATE_END_OF_LIST()
187 }
188 };
189
190 static const VMStateDescription vmstate_virtio_pci = {
191 .name = "virtio_pci",
192 .version_id = 1,
193 .minimum_version_id = 1,
194 .minimum_version_id_old = 1,
195 .fields = (VMStateField[]) {
196 VMSTATE_END_OF_LIST()
197 },
198 .subsections = (const VMStateDescription*[]) {
199 &vmstate_virtio_pci_modern_state,
200 NULL
201 }
202 };
203
204 static void virtio_pci_save_extra_state(DeviceState *d, QEMUFile *f)
205 {
206 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
207
208 vmstate_save_state(f, &vmstate_virtio_pci, proxy, NULL);
209 }
210
211 static int virtio_pci_load_extra_state(DeviceState *d, QEMUFile *f)
212 {
213 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
214
215 return vmstate_load_state(f, &vmstate_virtio_pci, proxy, 1);
216 }
217
218 static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f)
219 {
220 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
221 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
222
223 if (msix_present(&proxy->pci_dev))
224 qemu_put_be16(f, virtio_queue_vector(vdev, n));
225 }
226
227 static int virtio_pci_load_config(DeviceState *d, QEMUFile *f)
228 {
229 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
230 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
231
232 int ret;
233 ret = pci_device_load(&proxy->pci_dev, f);
234 if (ret) {
235 return ret;
236 }
237 msix_unuse_all_vectors(&proxy->pci_dev);
238 msix_load(&proxy->pci_dev, f);
239 if (msix_present(&proxy->pci_dev)) {
240 qemu_get_be16s(f, &vdev->config_vector);
241 } else {
242 vdev->config_vector = VIRTIO_NO_VECTOR;
243 }
244 if (vdev->config_vector != VIRTIO_NO_VECTOR) {
245 return msix_vector_use(&proxy->pci_dev, vdev->config_vector);
246 }
247 return 0;
248 }
249
250 static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f)
251 {
252 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
253 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
254
255 uint16_t vector;
256 if (msix_present(&proxy->pci_dev)) {
257 qemu_get_be16s(f, &vector);
258 } else {
259 vector = VIRTIO_NO_VECTOR;
260 }
261 virtio_queue_set_vector(vdev, n, vector);
262 if (vector != VIRTIO_NO_VECTOR) {
263 return msix_vector_use(&proxy->pci_dev, vector);
264 }
265
266 return 0;
267 }
268
269 static bool virtio_pci_ioeventfd_enabled(DeviceState *d)
270 {
271 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
272
273 return (proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) != 0;
274 }
275
276 #define QEMU_VIRTIO_PCI_QUEUE_MEM_MULT 0x1000
277
278 static inline int virtio_pci_queue_mem_mult(struct VirtIOPCIProxy *proxy)
279 {
280 return (proxy->flags & VIRTIO_PCI_FLAG_PAGE_PER_VQ) ?
281 QEMU_VIRTIO_PCI_QUEUE_MEM_MULT : 4;
282 }
283
284 static int virtio_pci_ioeventfd_assign(DeviceState *d, EventNotifier *notifier,
285 int n, bool assign)
286 {
287 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
288 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
289 VirtQueue *vq = virtio_get_queue(vdev, n);
290 bool legacy = virtio_pci_legacy(proxy);
291 bool modern = virtio_pci_modern(proxy);
292 bool fast_mmio = kvm_ioeventfd_any_length_enabled();
293 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
294 MemoryRegion *modern_mr = &proxy->notify.mr;
295 MemoryRegion *modern_notify_mr = &proxy->notify_pio.mr;
296 MemoryRegion *legacy_mr = &proxy->bar;
297 hwaddr modern_addr = virtio_pci_queue_mem_mult(proxy) *
298 virtio_get_queue_index(vq);
299 hwaddr legacy_addr = VIRTIO_PCI_QUEUE_NOTIFY;
300
301 if (assign) {
302 if (modern) {
303 if (fast_mmio) {
304 memory_region_add_eventfd(modern_mr, modern_addr, 0,
305 false, n, notifier);
306 } else {
307 memory_region_add_eventfd(modern_mr, modern_addr, 2,
308 false, n, notifier);
309 }
310 if (modern_pio) {
311 memory_region_add_eventfd(modern_notify_mr, 0, 2,
312 true, n, notifier);
313 }
314 }
315 if (legacy) {
316 memory_region_add_eventfd(legacy_mr, legacy_addr, 2,
317 true, n, notifier);
318 }
319 } else {
320 if (modern) {
321 if (fast_mmio) {
322 memory_region_del_eventfd(modern_mr, modern_addr, 0,
323 false, n, notifier);
324 } else {
325 memory_region_del_eventfd(modern_mr, modern_addr, 2,
326 false, n, notifier);
327 }
328 if (modern_pio) {
329 memory_region_del_eventfd(modern_notify_mr, 0, 2,
330 true, n, notifier);
331 }
332 }
333 if (legacy) {
334 memory_region_del_eventfd(legacy_mr, legacy_addr, 2,
335 true, n, notifier);
336 }
337 }
338 return 0;
339 }
340
341 static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy)
342 {
343 virtio_bus_start_ioeventfd(&proxy->bus);
344 }
345
346 static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy)
347 {
348 virtio_bus_stop_ioeventfd(&proxy->bus);
349 }
350
351 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
352 {
353 VirtIOPCIProxy *proxy = opaque;
354 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
355 hwaddr pa;
356
357 switch (addr) {
358 case VIRTIO_PCI_GUEST_FEATURES:
359 /* Guest does not negotiate properly? We have to assume nothing. */
360 if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
361 val = virtio_bus_get_vdev_bad_features(&proxy->bus);
362 }
363 virtio_set_features(vdev, val);
364 break;
365 case VIRTIO_PCI_QUEUE_PFN:
366 pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
367 if (pa == 0) {
368 virtio_pci_reset(DEVICE(proxy));
369 }
370 else
371 virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
372 break;
373 case VIRTIO_PCI_QUEUE_SEL:
374 if (val < VIRTIO_QUEUE_MAX)
375 vdev->queue_sel = val;
376 break;
377 case VIRTIO_PCI_QUEUE_NOTIFY:
378 if (val < VIRTIO_QUEUE_MAX) {
379 virtio_queue_notify(vdev, val);
380 }
381 break;
382 case VIRTIO_PCI_STATUS:
383 if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
384 virtio_pci_stop_ioeventfd(proxy);
385 }
386
387 virtio_set_status(vdev, val & 0xFF);
388
389 if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
390 virtio_pci_start_ioeventfd(proxy);
391 }
392
393 if (vdev->status == 0) {
394 virtio_pci_reset(DEVICE(proxy));
395 }
396
397 /* Linux before 2.6.34 drives the device without enabling
398 the PCI device bus master bit. Enable it automatically
399 for the guest. This is a PCI spec violation but so is
400 initiating DMA with bus master bit clear. */
401 if (val == (VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER)) {
402 pci_default_write_config(&proxy->pci_dev, PCI_COMMAND,
403 proxy->pci_dev.config[PCI_COMMAND] |
404 PCI_COMMAND_MASTER, 1);
405 }
406 break;
407 case VIRTIO_MSI_CONFIG_VECTOR:
408 msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
409 /* Make it possible for guest to discover an error took place. */
410 if (msix_vector_use(&proxy->pci_dev, val) < 0)
411 val = VIRTIO_NO_VECTOR;
412 vdev->config_vector = val;
413 break;
414 case VIRTIO_MSI_QUEUE_VECTOR:
415 msix_vector_unuse(&proxy->pci_dev,
416 virtio_queue_vector(vdev, vdev->queue_sel));
417 /* Make it possible for guest to discover an error took place. */
418 if (msix_vector_use(&proxy->pci_dev, val) < 0)
419 val = VIRTIO_NO_VECTOR;
420 virtio_queue_set_vector(vdev, vdev->queue_sel, val);
421 break;
422 default:
423 error_report("%s: unexpected address 0x%x value 0x%x",
424 __func__, addr, val);
425 break;
426 }
427 }
428
429 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
430 {
431 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
432 uint32_t ret = 0xFFFFFFFF;
433
434 switch (addr) {
435 case VIRTIO_PCI_HOST_FEATURES:
436 ret = vdev->host_features;
437 break;
438 case VIRTIO_PCI_GUEST_FEATURES:
439 ret = vdev->guest_features;
440 break;
441 case VIRTIO_PCI_QUEUE_PFN:
442 ret = virtio_queue_get_addr(vdev, vdev->queue_sel)
443 >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
444 break;
445 case VIRTIO_PCI_QUEUE_NUM:
446 ret = virtio_queue_get_num(vdev, vdev->queue_sel);
447 break;
448 case VIRTIO_PCI_QUEUE_SEL:
449 ret = vdev->queue_sel;
450 break;
451 case VIRTIO_PCI_STATUS:
452 ret = vdev->status;
453 break;
454 case VIRTIO_PCI_ISR:
455 /* reading from the ISR also clears it. */
456 ret = atomic_xchg(&vdev->isr, 0);
457 pci_irq_deassert(&proxy->pci_dev);
458 break;
459 case VIRTIO_MSI_CONFIG_VECTOR:
460 ret = vdev->config_vector;
461 break;
462 case VIRTIO_MSI_QUEUE_VECTOR:
463 ret = virtio_queue_vector(vdev, vdev->queue_sel);
464 break;
465 default:
466 break;
467 }
468
469 return ret;
470 }
471
472 static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr,
473 unsigned size)
474 {
475 VirtIOPCIProxy *proxy = opaque;
476 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
477 uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev);
478 uint64_t val = 0;
479 if (addr < config) {
480 return virtio_ioport_read(proxy, addr);
481 }
482 addr -= config;
483
484 switch (size) {
485 case 1:
486 val = virtio_config_readb(vdev, addr);
487 break;
488 case 2:
489 val = virtio_config_readw(vdev, addr);
490 if (virtio_is_big_endian(vdev)) {
491 val = bswap16(val);
492 }
493 break;
494 case 4:
495 val = virtio_config_readl(vdev, addr);
496 if (virtio_is_big_endian(vdev)) {
497 val = bswap32(val);
498 }
499 break;
500 }
501 return val;
502 }
503
504 static void virtio_pci_config_write(void *opaque, hwaddr addr,
505 uint64_t val, unsigned size)
506 {
507 VirtIOPCIProxy *proxy = opaque;
508 uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev);
509 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
510 if (addr < config) {
511 virtio_ioport_write(proxy, addr, val);
512 return;
513 }
514 addr -= config;
515 /*
516 * Virtio-PCI is odd. Ioports are LE but config space is target native
517 * endian.
518 */
519 switch (size) {
520 case 1:
521 virtio_config_writeb(vdev, addr, val);
522 break;
523 case 2:
524 if (virtio_is_big_endian(vdev)) {
525 val = bswap16(val);
526 }
527 virtio_config_writew(vdev, addr, val);
528 break;
529 case 4:
530 if (virtio_is_big_endian(vdev)) {
531 val = bswap32(val);
532 }
533 virtio_config_writel(vdev, addr, val);
534 break;
535 }
536 }
537
538 static const MemoryRegionOps virtio_pci_config_ops = {
539 .read = virtio_pci_config_read,
540 .write = virtio_pci_config_write,
541 .impl = {
542 .min_access_size = 1,
543 .max_access_size = 4,
544 },
545 .endianness = DEVICE_LITTLE_ENDIAN,
546 };
547
548 /* Below are generic functions to do memcpy from/to an address space,
549 * without byteswaps, with input validation.
550 *
551 * As regular address_space_* APIs all do some kind of byteswap at least for
552 * some host/target combinations, we are forced to explicitly convert to a
553 * known-endianness integer value.
554 * It doesn't really matter which endian format to go through, so the code
555 * below selects the endian that causes the least amount of work on the given
556 * host.
557 *
558 * Note: host pointer must be aligned.
559 */
560 static
561 void virtio_address_space_write(AddressSpace *as, hwaddr addr,
562 const uint8_t *buf, int len)
563 {
564 uint32_t val;
565
566 /* address_space_* APIs assume an aligned address.
567 * As address is under guest control, handle illegal values.
568 */
569 addr &= ~(len - 1);
570
571 /* Make sure caller aligned buf properly */
572 assert(!(((uintptr_t)buf) & (len - 1)));
573
574 switch (len) {
575 case 1:
576 val = pci_get_byte(buf);
577 address_space_stb(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL);
578 break;
579 case 2:
580 val = pci_get_word(buf);
581 address_space_stw_le(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL);
582 break;
583 case 4:
584 val = pci_get_long(buf);
585 address_space_stl_le(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL);
586 break;
587 default:
588 /* As length is under guest control, handle illegal values. */
589 break;
590 }
591 }
592
593 static void
594 virtio_address_space_read(AddressSpace *as, hwaddr addr, uint8_t *buf, int len)
595 {
596 uint32_t val;
597
598 /* address_space_* APIs assume an aligned address.
599 * As address is under guest control, handle illegal values.
600 */
601 addr &= ~(len - 1);
602
603 /* Make sure caller aligned buf properly */
604 assert(!(((uintptr_t)buf) & (len - 1)));
605
606 switch (len) {
607 case 1:
608 val = address_space_ldub(as, addr, MEMTXATTRS_UNSPECIFIED, NULL);
609 pci_set_byte(buf, val);
610 break;
611 case 2:
612 val = address_space_lduw_le(as, addr, MEMTXATTRS_UNSPECIFIED, NULL);
613 pci_set_word(buf, val);
614 break;
615 case 4:
616 val = address_space_ldl_le(as, addr, MEMTXATTRS_UNSPECIFIED, NULL);
617 pci_set_long(buf, val);
618 break;
619 default:
620 /* As length is under guest control, handle illegal values. */
621 break;
622 }
623 }
624
625 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
626 uint32_t val, int len)
627 {
628 VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
629 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
630 struct virtio_pci_cfg_cap *cfg;
631
632 pci_default_write_config(pci_dev, address, val, len);
633
634 if (range_covers_byte(address, len, PCI_COMMAND) &&
635 !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
636 virtio_pci_stop_ioeventfd(proxy);
637 virtio_set_status(vdev, vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
638 }
639
640 if (proxy->config_cap &&
641 ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap,
642 pci_cfg_data),
643 sizeof cfg->pci_cfg_data)) {
644 uint32_t off;
645 uint32_t len;
646
647 cfg = (void *)(proxy->pci_dev.config + proxy->config_cap);
648 off = le32_to_cpu(cfg->cap.offset);
649 len = le32_to_cpu(cfg->cap.length);
650
651 if (len == 1 || len == 2 || len == 4) {
652 assert(len <= sizeof cfg->pci_cfg_data);
653 virtio_address_space_write(&proxy->modern_as, off,
654 cfg->pci_cfg_data, len);
655 }
656 }
657 }
658
659 static uint32_t virtio_read_config(PCIDevice *pci_dev,
660 uint32_t address, int len)
661 {
662 VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
663 struct virtio_pci_cfg_cap *cfg;
664
665 if (proxy->config_cap &&
666 ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap,
667 pci_cfg_data),
668 sizeof cfg->pci_cfg_data)) {
669 uint32_t off;
670 uint32_t len;
671
672 cfg = (void *)(proxy->pci_dev.config + proxy->config_cap);
673 off = le32_to_cpu(cfg->cap.offset);
674 len = le32_to_cpu(cfg->cap.length);
675
676 if (len == 1 || len == 2 || len == 4) {
677 assert(len <= sizeof cfg->pci_cfg_data);
678 virtio_address_space_read(&proxy->modern_as, off,
679 cfg->pci_cfg_data, len);
680 }
681 }
682
683 return pci_default_read_config(pci_dev, address, len);
684 }
685
686 static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy,
687 unsigned int queue_no,
688 unsigned int vector)
689 {
690 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
691 int ret;
692
693 if (irqfd->users == 0) {
694 ret = kvm_irqchip_add_msi_route(kvm_state, vector, &proxy->pci_dev);
695 if (ret < 0) {
696 return ret;
697 }
698 irqfd->virq = ret;
699 }
700 irqfd->users++;
701 return 0;
702 }
703
704 static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy,
705 unsigned int vector)
706 {
707 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
708 if (--irqfd->users == 0) {
709 kvm_irqchip_release_virq(kvm_state, irqfd->virq);
710 }
711 }
712
713 static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy,
714 unsigned int queue_no,
715 unsigned int vector)
716 {
717 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
718 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
719 VirtQueue *vq = virtio_get_queue(vdev, queue_no);
720 EventNotifier *n = virtio_queue_get_guest_notifier(vq);
721 return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, n, NULL, irqfd->virq);
722 }
723
724 static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy,
725 unsigned int queue_no,
726 unsigned int vector)
727 {
728 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
729 VirtQueue *vq = virtio_get_queue(vdev, queue_no);
730 EventNotifier *n = virtio_queue_get_guest_notifier(vq);
731 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
732 int ret;
733
734 ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, n, irqfd->virq);
735 assert(ret == 0);
736 }
737
738 static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
739 {
740 PCIDevice *dev = &proxy->pci_dev;
741 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
742 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
743 unsigned int vector;
744 int ret, queue_no;
745
746 for (queue_no = 0; queue_no < nvqs; queue_no++) {
747 if (!virtio_queue_get_num(vdev, queue_no)) {
748 break;
749 }
750 vector = virtio_queue_vector(vdev, queue_no);
751 if (vector >= msix_nr_vectors_allocated(dev)) {
752 continue;
753 }
754 ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector);
755 if (ret < 0) {
756 goto undo;
757 }
758 /* If guest supports masking, set up irqfd now.
759 * Otherwise, delay until unmasked in the frontend.
760 */
761 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
762 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
763 if (ret < 0) {
764 kvm_virtio_pci_vq_vector_release(proxy, vector);
765 goto undo;
766 }
767 }
768 }
769 return 0;
770
771 undo:
772 while (--queue_no >= 0) {
773 vector = virtio_queue_vector(vdev, queue_no);
774 if (vector >= msix_nr_vectors_allocated(dev)) {
775 continue;
776 }
777 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
778 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
779 }
780 kvm_virtio_pci_vq_vector_release(proxy, vector);
781 }
782 return ret;
783 }
784
785 static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
786 {
787 PCIDevice *dev = &proxy->pci_dev;
788 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
789 unsigned int vector;
790 int queue_no;
791 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
792
793 for (queue_no = 0; queue_no < nvqs; queue_no++) {
794 if (!virtio_queue_get_num(vdev, queue_no)) {
795 break;
796 }
797 vector = virtio_queue_vector(vdev, queue_no);
798 if (vector >= msix_nr_vectors_allocated(dev)) {
799 continue;
800 }
801 /* If guest supports masking, clean up irqfd now.
802 * Otherwise, it was cleaned when masked in the frontend.
803 */
804 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
805 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
806 }
807 kvm_virtio_pci_vq_vector_release(proxy, vector);
808 }
809 }
810
811 static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy,
812 unsigned int queue_no,
813 unsigned int vector,
814 MSIMessage msg)
815 {
816 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
817 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
818 VirtQueue *vq = virtio_get_queue(vdev, queue_no);
819 EventNotifier *n = virtio_queue_get_guest_notifier(vq);
820 VirtIOIRQFD *irqfd;
821 int ret = 0;
822
823 if (proxy->vector_irqfd) {
824 irqfd = &proxy->vector_irqfd[vector];
825 if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) {
826 ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg,
827 &proxy->pci_dev);
828 if (ret < 0) {
829 return ret;
830 }
831 kvm_irqchip_commit_routes(kvm_state);
832 }
833 }
834
835 /* If guest supports masking, irqfd is already setup, unmask it.
836 * Otherwise, set it up now.
837 */
838 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
839 k->guest_notifier_mask(vdev, queue_no, false);
840 /* Test after unmasking to avoid losing events. */
841 if (k->guest_notifier_pending &&
842 k->guest_notifier_pending(vdev, queue_no)) {
843 event_notifier_set(n);
844 }
845 } else {
846 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
847 }
848 return ret;
849 }
850
851 static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy,
852 unsigned int queue_no,
853 unsigned int vector)
854 {
855 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
856 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
857
858 /* If guest supports masking, keep irqfd but mask it.
859 * Otherwise, clean it up now.
860 */
861 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
862 k->guest_notifier_mask(vdev, queue_no, true);
863 } else {
864 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
865 }
866 }
867
868 static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector,
869 MSIMessage msg)
870 {
871 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
872 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
873 VirtQueue *vq = virtio_vector_first_queue(vdev, vector);
874 int ret, index, unmasked = 0;
875
876 while (vq) {
877 index = virtio_get_queue_index(vq);
878 if (!virtio_queue_get_num(vdev, index)) {
879 break;
880 }
881 if (index < proxy->nvqs_with_notifiers) {
882 ret = virtio_pci_vq_vector_unmask(proxy, index, vector, msg);
883 if (ret < 0) {
884 goto undo;
885 }
886 ++unmasked;
887 }
888 vq = virtio_vector_next_queue(vq);
889 }
890
891 return 0;
892
893 undo:
894 vq = virtio_vector_first_queue(vdev, vector);
895 while (vq && unmasked >= 0) {
896 index = virtio_get_queue_index(vq);
897 if (index < proxy->nvqs_with_notifiers) {
898 virtio_pci_vq_vector_mask(proxy, index, vector);
899 --unmasked;
900 }
901 vq = virtio_vector_next_queue(vq);
902 }
903 return ret;
904 }
905
906 static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector)
907 {
908 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
909 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
910 VirtQueue *vq = virtio_vector_first_queue(vdev, vector);
911 int index;
912
913 while (vq) {
914 index = virtio_get_queue_index(vq);
915 if (!virtio_queue_get_num(vdev, index)) {
916 break;
917 }
918 if (index < proxy->nvqs_with_notifiers) {
919 virtio_pci_vq_vector_mask(proxy, index, vector);
920 }
921 vq = virtio_vector_next_queue(vq);
922 }
923 }
924
925 static void virtio_pci_vector_poll(PCIDevice *dev,
926 unsigned int vector_start,
927 unsigned int vector_end)
928 {
929 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
930 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
931 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
932 int queue_no;
933 unsigned int vector;
934 EventNotifier *notifier;
935 VirtQueue *vq;
936
937 for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
938 if (!virtio_queue_get_num(vdev, queue_no)) {
939 break;
940 }
941 vector = virtio_queue_vector(vdev, queue_no);
942 if (vector < vector_start || vector >= vector_end ||
943 !msix_is_masked(dev, vector)) {
944 continue;
945 }
946 vq = virtio_get_queue(vdev, queue_no);
947 notifier = virtio_queue_get_guest_notifier(vq);
948 if (k->guest_notifier_pending) {
949 if (k->guest_notifier_pending(vdev, queue_no)) {
950 msix_set_pending(dev, vector);
951 }
952 } else if (event_notifier_test_and_clear(notifier)) {
953 msix_set_pending(dev, vector);
954 }
955 }
956 }
957
958 static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
959 bool with_irqfd)
960 {
961 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
962 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
963 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
964 VirtQueue *vq = virtio_get_queue(vdev, n);
965 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
966
967 if (assign) {
968 int r = event_notifier_init(notifier, 0);
969 if (r < 0) {
970 return r;
971 }
972 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
973 } else {
974 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
975 event_notifier_cleanup(notifier);
976 }
977
978 if (!msix_enabled(&proxy->pci_dev) &&
979 vdev->use_guest_notifier_mask &&
980 vdc->guest_notifier_mask) {
981 vdc->guest_notifier_mask(vdev, n, !assign);
982 }
983
984 return 0;
985 }
986
987 static bool virtio_pci_query_guest_notifiers(DeviceState *d)
988 {
989 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
990 return msix_enabled(&proxy->pci_dev);
991 }
992
993 static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
994 {
995 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
996 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
997 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
998 int r, n;
999 bool with_irqfd = msix_enabled(&proxy->pci_dev) &&
1000 kvm_msi_via_irqfd_enabled();
1001
1002 nvqs = MIN(nvqs, VIRTIO_QUEUE_MAX);
1003
1004 /* When deassigning, pass a consistent nvqs value
1005 * to avoid leaking notifiers.
1006 */
1007 assert(assign || nvqs == proxy->nvqs_with_notifiers);
1008
1009 proxy->nvqs_with_notifiers = nvqs;
1010
1011 /* Must unset vector notifier while guest notifier is still assigned */
1012 if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) {
1013 msix_unset_vector_notifiers(&proxy->pci_dev);
1014 if (proxy->vector_irqfd) {
1015 kvm_virtio_pci_vector_release(proxy, nvqs);
1016 g_free(proxy->vector_irqfd);
1017 proxy->vector_irqfd = NULL;
1018 }
1019 }
1020
1021 for (n = 0; n < nvqs; n++) {
1022 if (!virtio_queue_get_num(vdev, n)) {
1023 break;
1024 }
1025
1026 r = virtio_pci_set_guest_notifier(d, n, assign, with_irqfd);
1027 if (r < 0) {
1028 goto assign_error;
1029 }
1030 }
1031
1032 /* Must set vector notifier after guest notifier has been assigned */
1033 if ((with_irqfd || k->guest_notifier_mask) && assign) {
1034 if (with_irqfd) {
1035 proxy->vector_irqfd =
1036 g_malloc0(sizeof(*proxy->vector_irqfd) *
1037 msix_nr_vectors_allocated(&proxy->pci_dev));
1038 r = kvm_virtio_pci_vector_use(proxy, nvqs);
1039 if (r < 0) {
1040 goto assign_error;
1041 }
1042 }
1043 r = msix_set_vector_notifiers(&proxy->pci_dev,
1044 virtio_pci_vector_unmask,
1045 virtio_pci_vector_mask,
1046 virtio_pci_vector_poll);
1047 if (r < 0) {
1048 goto notifiers_error;
1049 }
1050 }
1051
1052 return 0;
1053
1054 notifiers_error:
1055 if (with_irqfd) {
1056 assert(assign);
1057 kvm_virtio_pci_vector_release(proxy, nvqs);
1058 }
1059
1060 assign_error:
1061 /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
1062 assert(assign);
1063 while (--n >= 0) {
1064 virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd);
1065 }
1066 return r;
1067 }
1068
1069 static void virtio_pci_vmstate_change(DeviceState *d, bool running)
1070 {
1071 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
1072 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1073
1074 if (running) {
1075 /* Old QEMU versions did not set bus master enable on status write.
1076 * Detect DRIVER set and enable it.
1077 */
1078 if ((proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION) &&
1079 (vdev->status & VIRTIO_CONFIG_S_DRIVER) &&
1080 !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
1081 pci_default_write_config(&proxy->pci_dev, PCI_COMMAND,
1082 proxy->pci_dev.config[PCI_COMMAND] |
1083 PCI_COMMAND_MASTER, 1);
1084 }
1085 virtio_pci_start_ioeventfd(proxy);
1086 } else {
1087 virtio_pci_stop_ioeventfd(proxy);
1088 }
1089 }
1090
1091 #ifdef CONFIG_VIRTFS
1092 static void virtio_9p_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
1093 {
1094 V9fsPCIState *dev = VIRTIO_9P_PCI(vpci_dev);
1095 DeviceState *vdev = DEVICE(&dev->vdev);
1096
1097 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1098 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
1099 }
1100
1101 static Property virtio_9p_pci_properties[] = {
1102 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1103 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1104 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
1105 DEFINE_PROP_END_OF_LIST(),
1106 };
1107
1108 static void virtio_9p_pci_class_init(ObjectClass *klass, void *data)
1109 {
1110 DeviceClass *dc = DEVICE_CLASS(klass);
1111 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1112 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1113
1114 k->realize = virtio_9p_pci_realize;
1115 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1116 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_9P;
1117 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1118 pcidev_k->class_id = 0x2;
1119 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1120 dc->props = virtio_9p_pci_properties;
1121 }
1122
1123 static void virtio_9p_pci_instance_init(Object *obj)
1124 {
1125 V9fsPCIState *dev = VIRTIO_9P_PCI(obj);
1126
1127 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1128 TYPE_VIRTIO_9P);
1129 }
1130
1131 static const TypeInfo virtio_9p_pci_info = {
1132 .name = TYPE_VIRTIO_9P_PCI,
1133 .parent = TYPE_VIRTIO_PCI,
1134 .instance_size = sizeof(V9fsPCIState),
1135 .instance_init = virtio_9p_pci_instance_init,
1136 .class_init = virtio_9p_pci_class_init,
1137 };
1138 #endif /* CONFIG_VIRTFS */
1139
1140 /*
1141 * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
1142 */
1143
1144 static int virtio_pci_query_nvectors(DeviceState *d)
1145 {
1146 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1147
1148 return proxy->nvectors;
1149 }
1150
1151 static AddressSpace *virtio_pci_get_dma_as(DeviceState *d)
1152 {
1153 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1154 PCIDevice *dev = &proxy->pci_dev;
1155
1156 return pci_get_address_space(dev);
1157 }
1158
1159 static int virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy,
1160 struct virtio_pci_cap *cap)
1161 {
1162 PCIDevice *dev = &proxy->pci_dev;
1163 int offset;
1164
1165 offset = pci_add_capability(dev, PCI_CAP_ID_VNDR, 0, cap->cap_len);
1166 assert(offset > 0);
1167
1168 assert(cap->cap_len >= sizeof *cap);
1169 memcpy(dev->config + offset + PCI_CAP_FLAGS, &cap->cap_len,
1170 cap->cap_len - PCI_CAP_FLAGS);
1171
1172 return offset;
1173 }
1174
1175 static uint64_t virtio_pci_common_read(void *opaque, hwaddr addr,
1176 unsigned size)
1177 {
1178 VirtIOPCIProxy *proxy = opaque;
1179 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1180 uint32_t val = 0;
1181 int i;
1182
1183 switch (addr) {
1184 case VIRTIO_PCI_COMMON_DFSELECT:
1185 val = proxy->dfselect;
1186 break;
1187 case VIRTIO_PCI_COMMON_DF:
1188 if (proxy->dfselect <= 1) {
1189 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
1190
1191 val = (vdev->host_features & ~vdc->legacy_features) >>
1192 (32 * proxy->dfselect);
1193 }
1194 break;
1195 case VIRTIO_PCI_COMMON_GFSELECT:
1196 val = proxy->gfselect;
1197 break;
1198 case VIRTIO_PCI_COMMON_GF:
1199 if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) {
1200 val = proxy->guest_features[proxy->gfselect];
1201 }
1202 break;
1203 case VIRTIO_PCI_COMMON_MSIX:
1204 val = vdev->config_vector;
1205 break;
1206 case VIRTIO_PCI_COMMON_NUMQ:
1207 for (i = 0; i < VIRTIO_QUEUE_MAX; ++i) {
1208 if (virtio_queue_get_num(vdev, i)) {
1209 val = i + 1;
1210 }
1211 }
1212 break;
1213 case VIRTIO_PCI_COMMON_STATUS:
1214 val = vdev->status;
1215 break;
1216 case VIRTIO_PCI_COMMON_CFGGENERATION:
1217 val = vdev->generation;
1218 break;
1219 case VIRTIO_PCI_COMMON_Q_SELECT:
1220 val = vdev->queue_sel;
1221 break;
1222 case VIRTIO_PCI_COMMON_Q_SIZE:
1223 val = virtio_queue_get_num(vdev, vdev->queue_sel);
1224 break;
1225 case VIRTIO_PCI_COMMON_Q_MSIX:
1226 val = virtio_queue_vector(vdev, vdev->queue_sel);
1227 break;
1228 case VIRTIO_PCI_COMMON_Q_ENABLE:
1229 val = proxy->vqs[vdev->queue_sel].enabled;
1230 break;
1231 case VIRTIO_PCI_COMMON_Q_NOFF:
1232 /* Simply map queues in order */
1233 val = vdev->queue_sel;
1234 break;
1235 case VIRTIO_PCI_COMMON_Q_DESCLO:
1236 val = proxy->vqs[vdev->queue_sel].desc[0];
1237 break;
1238 case VIRTIO_PCI_COMMON_Q_DESCHI:
1239 val = proxy->vqs[vdev->queue_sel].desc[1];
1240 break;
1241 case VIRTIO_PCI_COMMON_Q_AVAILLO:
1242 val = proxy->vqs[vdev->queue_sel].avail[0];
1243 break;
1244 case VIRTIO_PCI_COMMON_Q_AVAILHI:
1245 val = proxy->vqs[vdev->queue_sel].avail[1];
1246 break;
1247 case VIRTIO_PCI_COMMON_Q_USEDLO:
1248 val = proxy->vqs[vdev->queue_sel].used[0];
1249 break;
1250 case VIRTIO_PCI_COMMON_Q_USEDHI:
1251 val = proxy->vqs[vdev->queue_sel].used[1];
1252 break;
1253 default:
1254 val = 0;
1255 }
1256
1257 return val;
1258 }
1259
1260 static void virtio_pci_common_write(void *opaque, hwaddr addr,
1261 uint64_t val, unsigned size)
1262 {
1263 VirtIOPCIProxy *proxy = opaque;
1264 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1265
1266 switch (addr) {
1267 case VIRTIO_PCI_COMMON_DFSELECT:
1268 proxy->dfselect = val;
1269 break;
1270 case VIRTIO_PCI_COMMON_GFSELECT:
1271 proxy->gfselect = val;
1272 break;
1273 case VIRTIO_PCI_COMMON_GF:
1274 if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) {
1275 proxy->guest_features[proxy->gfselect] = val;
1276 virtio_set_features(vdev,
1277 (((uint64_t)proxy->guest_features[1]) << 32) |
1278 proxy->guest_features[0]);
1279 }
1280 break;
1281 case VIRTIO_PCI_COMMON_MSIX:
1282 msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
1283 /* Make it possible for guest to discover an error took place. */
1284 if (msix_vector_use(&proxy->pci_dev, val) < 0) {
1285 val = VIRTIO_NO_VECTOR;
1286 }
1287 vdev->config_vector = val;
1288 break;
1289 case VIRTIO_PCI_COMMON_STATUS:
1290 if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
1291 virtio_pci_stop_ioeventfd(proxy);
1292 }
1293
1294 virtio_set_status(vdev, val & 0xFF);
1295
1296 if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
1297 virtio_pci_start_ioeventfd(proxy);
1298 }
1299
1300 if (vdev->status == 0) {
1301 virtio_pci_reset(DEVICE(proxy));
1302 }
1303
1304 break;
1305 case VIRTIO_PCI_COMMON_Q_SELECT:
1306 if (val < VIRTIO_QUEUE_MAX) {
1307 vdev->queue_sel = val;
1308 }
1309 break;
1310 case VIRTIO_PCI_COMMON_Q_SIZE:
1311 proxy->vqs[vdev->queue_sel].num = val;
1312 break;
1313 case VIRTIO_PCI_COMMON_Q_MSIX:
1314 msix_vector_unuse(&proxy->pci_dev,
1315 virtio_queue_vector(vdev, vdev->queue_sel));
1316 /* Make it possible for guest to discover an error took place. */
1317 if (msix_vector_use(&proxy->pci_dev, val) < 0) {
1318 val = VIRTIO_NO_VECTOR;
1319 }
1320 virtio_queue_set_vector(vdev, vdev->queue_sel, val);
1321 break;
1322 case VIRTIO_PCI_COMMON_Q_ENABLE:
1323 virtio_queue_set_num(vdev, vdev->queue_sel,
1324 proxy->vqs[vdev->queue_sel].num);
1325 virtio_queue_set_rings(vdev, vdev->queue_sel,
1326 ((uint64_t)proxy->vqs[vdev->queue_sel].desc[1]) << 32 |
1327 proxy->vqs[vdev->queue_sel].desc[0],
1328 ((uint64_t)proxy->vqs[vdev->queue_sel].avail[1]) << 32 |
1329 proxy->vqs[vdev->queue_sel].avail[0],
1330 ((uint64_t)proxy->vqs[vdev->queue_sel].used[1]) << 32 |
1331 proxy->vqs[vdev->queue_sel].used[0]);
1332 proxy->vqs[vdev->queue_sel].enabled = 1;
1333 break;
1334 case VIRTIO_PCI_COMMON_Q_DESCLO:
1335 proxy->vqs[vdev->queue_sel].desc[0] = val;
1336 break;
1337 case VIRTIO_PCI_COMMON_Q_DESCHI:
1338 proxy->vqs[vdev->queue_sel].desc[1] = val;
1339 break;
1340 case VIRTIO_PCI_COMMON_Q_AVAILLO:
1341 proxy->vqs[vdev->queue_sel].avail[0] = val;
1342 break;
1343 case VIRTIO_PCI_COMMON_Q_AVAILHI:
1344 proxy->vqs[vdev->queue_sel].avail[1] = val;
1345 break;
1346 case VIRTIO_PCI_COMMON_Q_USEDLO:
1347 proxy->vqs[vdev->queue_sel].used[0] = val;
1348 break;
1349 case VIRTIO_PCI_COMMON_Q_USEDHI:
1350 proxy->vqs[vdev->queue_sel].used[1] = val;
1351 break;
1352 default:
1353 break;
1354 }
1355 }
1356
1357
1358 static uint64_t virtio_pci_notify_read(void *opaque, hwaddr addr,
1359 unsigned size)
1360 {
1361 return 0;
1362 }
1363
1364 static void virtio_pci_notify_write(void *opaque, hwaddr addr,
1365 uint64_t val, unsigned size)
1366 {
1367 VirtIODevice *vdev = opaque;
1368 VirtIOPCIProxy *proxy = VIRTIO_PCI(DEVICE(vdev)->parent_bus->parent);
1369 unsigned queue = addr / virtio_pci_queue_mem_mult(proxy);
1370
1371 if (queue < VIRTIO_QUEUE_MAX) {
1372 virtio_queue_notify(vdev, queue);
1373 }
1374 }
1375
1376 static void virtio_pci_notify_write_pio(void *opaque, hwaddr addr,
1377 uint64_t val, unsigned size)
1378 {
1379 VirtIODevice *vdev = opaque;
1380 unsigned queue = val;
1381
1382 if (queue < VIRTIO_QUEUE_MAX) {
1383 virtio_queue_notify(vdev, queue);
1384 }
1385 }
1386
1387 static uint64_t virtio_pci_isr_read(void *opaque, hwaddr addr,
1388 unsigned size)
1389 {
1390 VirtIOPCIProxy *proxy = opaque;
1391 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1392 uint64_t val = atomic_xchg(&vdev->isr, 0);
1393 pci_irq_deassert(&proxy->pci_dev);
1394
1395 return val;
1396 }
1397
1398 static void virtio_pci_isr_write(void *opaque, hwaddr addr,
1399 uint64_t val, unsigned size)
1400 {
1401 }
1402
1403 static uint64_t virtio_pci_device_read(void *opaque, hwaddr addr,
1404 unsigned size)
1405 {
1406 VirtIODevice *vdev = opaque;
1407 uint64_t val = 0;
1408
1409 switch (size) {
1410 case 1:
1411 val = virtio_config_modern_readb(vdev, addr);
1412 break;
1413 case 2:
1414 val = virtio_config_modern_readw(vdev, addr);
1415 break;
1416 case 4:
1417 val = virtio_config_modern_readl(vdev, addr);
1418 break;
1419 }
1420 return val;
1421 }
1422
1423 static void virtio_pci_device_write(void *opaque, hwaddr addr,
1424 uint64_t val, unsigned size)
1425 {
1426 VirtIODevice *vdev = opaque;
1427 switch (size) {
1428 case 1:
1429 virtio_config_modern_writeb(vdev, addr, val);
1430 break;
1431 case 2:
1432 virtio_config_modern_writew(vdev, addr, val);
1433 break;
1434 case 4:
1435 virtio_config_modern_writel(vdev, addr, val);
1436 break;
1437 }
1438 }
1439
1440 static void virtio_pci_modern_regions_init(VirtIOPCIProxy *proxy)
1441 {
1442 static const MemoryRegionOps common_ops = {
1443 .read = virtio_pci_common_read,
1444 .write = virtio_pci_common_write,
1445 .impl = {
1446 .min_access_size = 1,
1447 .max_access_size = 4,
1448 },
1449 .endianness = DEVICE_LITTLE_ENDIAN,
1450 };
1451 static const MemoryRegionOps isr_ops = {
1452 .read = virtio_pci_isr_read,
1453 .write = virtio_pci_isr_write,
1454 .impl = {
1455 .min_access_size = 1,
1456 .max_access_size = 4,
1457 },
1458 .endianness = DEVICE_LITTLE_ENDIAN,
1459 };
1460 static const MemoryRegionOps device_ops = {
1461 .read = virtio_pci_device_read,
1462 .write = virtio_pci_device_write,
1463 .impl = {
1464 .min_access_size = 1,
1465 .max_access_size = 4,
1466 },
1467 .endianness = DEVICE_LITTLE_ENDIAN,
1468 };
1469 static const MemoryRegionOps notify_ops = {
1470 .read = virtio_pci_notify_read,
1471 .write = virtio_pci_notify_write,
1472 .impl = {
1473 .min_access_size = 1,
1474 .max_access_size = 4,
1475 },
1476 .endianness = DEVICE_LITTLE_ENDIAN,
1477 };
1478 static const MemoryRegionOps notify_pio_ops = {
1479 .read = virtio_pci_notify_read,
1480 .write = virtio_pci_notify_write_pio,
1481 .impl = {
1482 .min_access_size = 1,
1483 .max_access_size = 4,
1484 },
1485 .endianness = DEVICE_LITTLE_ENDIAN,
1486 };
1487
1488
1489 memory_region_init_io(&proxy->common.mr, OBJECT(proxy),
1490 &common_ops,
1491 proxy,
1492 "virtio-pci-common",
1493 proxy->common.size);
1494
1495 memory_region_init_io(&proxy->isr.mr, OBJECT(proxy),
1496 &isr_ops,
1497 proxy,
1498 "virtio-pci-isr",
1499 proxy->isr.size);
1500
1501 memory_region_init_io(&proxy->device.mr, OBJECT(proxy),
1502 &device_ops,
1503 virtio_bus_get_device(&proxy->bus),
1504 "virtio-pci-device",
1505 proxy->device.size);
1506
1507 memory_region_init_io(&proxy->notify.mr, OBJECT(proxy),
1508 &notify_ops,
1509 virtio_bus_get_device(&proxy->bus),
1510 "virtio-pci-notify",
1511 proxy->notify.size);
1512
1513 memory_region_init_io(&proxy->notify_pio.mr, OBJECT(proxy),
1514 &notify_pio_ops,
1515 virtio_bus_get_device(&proxy->bus),
1516 "virtio-pci-notify-pio",
1517 proxy->notify_pio.size);
1518 }
1519
1520 static void virtio_pci_modern_region_map(VirtIOPCIProxy *proxy,
1521 VirtIOPCIRegion *region,
1522 struct virtio_pci_cap *cap,
1523 MemoryRegion *mr,
1524 uint8_t bar)
1525 {
1526 memory_region_add_subregion(mr, region->offset, &region->mr);
1527
1528 cap->cfg_type = region->type;
1529 cap->bar = bar;
1530 cap->offset = cpu_to_le32(region->offset);
1531 cap->length = cpu_to_le32(region->size);
1532 virtio_pci_add_mem_cap(proxy, cap);
1533
1534 }
1535
1536 static void virtio_pci_modern_mem_region_map(VirtIOPCIProxy *proxy,
1537 VirtIOPCIRegion *region,
1538 struct virtio_pci_cap *cap)
1539 {
1540 virtio_pci_modern_region_map(proxy, region, cap,
1541 &proxy->modern_bar, proxy->modern_mem_bar_idx);
1542 }
1543
1544 static void virtio_pci_modern_io_region_map(VirtIOPCIProxy *proxy,
1545 VirtIOPCIRegion *region,
1546 struct virtio_pci_cap *cap)
1547 {
1548 virtio_pci_modern_region_map(proxy, region, cap,
1549 &proxy->io_bar, proxy->modern_io_bar_idx);
1550 }
1551
1552 static void virtio_pci_modern_mem_region_unmap(VirtIOPCIProxy *proxy,
1553 VirtIOPCIRegion *region)
1554 {
1555 memory_region_del_subregion(&proxy->modern_bar,
1556 &region->mr);
1557 }
1558
1559 static void virtio_pci_modern_io_region_unmap(VirtIOPCIProxy *proxy,
1560 VirtIOPCIRegion *region)
1561 {
1562 memory_region_del_subregion(&proxy->io_bar,
1563 &region->mr);
1564 }
1565
1566 static void virtio_pci_pre_plugged(DeviceState *d, Error **errp)
1567 {
1568 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1569 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1570
1571 if (virtio_pci_modern(proxy)) {
1572 virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1);
1573 }
1574
1575 virtio_add_feature(&vdev->host_features, VIRTIO_F_BAD_FEATURE);
1576 }
1577
1578 /* This is called by virtio-bus just after the device is plugged. */
1579 static void virtio_pci_device_plugged(DeviceState *d, Error **errp)
1580 {
1581 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1582 VirtioBusState *bus = &proxy->bus;
1583 bool legacy = virtio_pci_legacy(proxy);
1584 bool modern;
1585 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
1586 uint8_t *config;
1587 uint32_t size;
1588 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1589
1590 /*
1591 * Virtio capabilities present without
1592 * VIRTIO_F_VERSION_1 confuses guests
1593 */
1594 if (!proxy->ignore_backend_features &&
1595 !virtio_has_feature(vdev->host_features, VIRTIO_F_VERSION_1)) {
1596 virtio_pci_disable_modern(proxy);
1597
1598 if (!legacy) {
1599 error_setg(errp, "Device doesn't support modern mode, and legacy"
1600 " mode is disabled");
1601 error_append_hint(errp, "Set disable-legacy to off\n");
1602
1603 return;
1604 }
1605 }
1606
1607 modern = virtio_pci_modern(proxy);
1608
1609 config = proxy->pci_dev.config;
1610 if (proxy->class_code) {
1611 pci_config_set_class(config, proxy->class_code);
1612 }
1613
1614 if (legacy) {
1615 if (virtio_host_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM)) {
1616 error_setg(errp, "VIRTIO_F_IOMMU_PLATFORM was supported by"
1617 "neither legacy nor transitional device.");
1618 return ;
1619 }
1620 /* legacy and transitional */
1621 pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID,
1622 pci_get_word(config + PCI_VENDOR_ID));
1623 pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus));
1624 } else {
1625 /* pure virtio-1.0 */
1626 pci_set_word(config + PCI_VENDOR_ID,
1627 PCI_VENDOR_ID_REDHAT_QUMRANET);
1628 pci_set_word(config + PCI_DEVICE_ID,
1629 0x1040 + virtio_bus_get_vdev_id(bus));
1630 pci_config_set_revision(config, 1);
1631 }
1632 config[PCI_INTERRUPT_PIN] = 1;
1633
1634
1635 if (modern) {
1636 struct virtio_pci_cap cap = {
1637 .cap_len = sizeof cap,
1638 };
1639 struct virtio_pci_notify_cap notify = {
1640 .cap.cap_len = sizeof notify,
1641 .notify_off_multiplier =
1642 cpu_to_le32(virtio_pci_queue_mem_mult(proxy)),
1643 };
1644 struct virtio_pci_cfg_cap cfg = {
1645 .cap.cap_len = sizeof cfg,
1646 .cap.cfg_type = VIRTIO_PCI_CAP_PCI_CFG,
1647 };
1648 struct virtio_pci_notify_cap notify_pio = {
1649 .cap.cap_len = sizeof notify,
1650 .notify_off_multiplier = cpu_to_le32(0x0),
1651 };
1652
1653 struct virtio_pci_cfg_cap *cfg_mask;
1654
1655 virtio_pci_modern_regions_init(proxy);
1656
1657 virtio_pci_modern_mem_region_map(proxy, &proxy->common, &cap);
1658 virtio_pci_modern_mem_region_map(proxy, &proxy->isr, &cap);
1659 virtio_pci_modern_mem_region_map(proxy, &proxy->device, &cap);
1660 virtio_pci_modern_mem_region_map(proxy, &proxy->notify, &notify.cap);
1661
1662 if (modern_pio) {
1663 memory_region_init(&proxy->io_bar, OBJECT(proxy),
1664 "virtio-pci-io", 0x4);
1665
1666 pci_register_bar(&proxy->pci_dev, proxy->modern_io_bar_idx,
1667 PCI_BASE_ADDRESS_SPACE_IO, &proxy->io_bar);
1668
1669 virtio_pci_modern_io_region_map(proxy, &proxy->notify_pio,
1670 &notify_pio.cap);
1671 }
1672
1673 pci_register_bar(&proxy->pci_dev, proxy->modern_mem_bar_idx,
1674 PCI_BASE_ADDRESS_SPACE_MEMORY |
1675 PCI_BASE_ADDRESS_MEM_PREFETCH |
1676 PCI_BASE_ADDRESS_MEM_TYPE_64,
1677 &proxy->modern_bar);
1678
1679 proxy->config_cap = virtio_pci_add_mem_cap(proxy, &cfg.cap);
1680 cfg_mask = (void *)(proxy->pci_dev.wmask + proxy->config_cap);
1681 pci_set_byte(&cfg_mask->cap.bar, ~0x0);
1682 pci_set_long((uint8_t *)&cfg_mask->cap.offset, ~0x0);
1683 pci_set_long((uint8_t *)&cfg_mask->cap.length, ~0x0);
1684 pci_set_long(cfg_mask->pci_cfg_data, ~0x0);
1685 }
1686
1687 if (proxy->nvectors) {
1688 int err = msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors,
1689 proxy->msix_bar_idx, NULL);
1690 if (err) {
1691 /* Notice when a system that supports MSIx can't initialize it */
1692 if (err != -ENOTSUP) {
1693 error_report("unable to init msix vectors to %" PRIu32,
1694 proxy->nvectors);
1695 }
1696 proxy->nvectors = 0;
1697 }
1698 }
1699
1700 proxy->pci_dev.config_write = virtio_write_config;
1701 proxy->pci_dev.config_read = virtio_read_config;
1702
1703 if (legacy) {
1704 size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev)
1705 + virtio_bus_get_vdev_config_len(bus);
1706 size = pow2ceil(size);
1707
1708 memory_region_init_io(&proxy->bar, OBJECT(proxy),
1709 &virtio_pci_config_ops,
1710 proxy, "virtio-pci", size);
1711
1712 pci_register_bar(&proxy->pci_dev, proxy->legacy_io_bar_idx,
1713 PCI_BASE_ADDRESS_SPACE_IO, &proxy->bar);
1714 }
1715 }
1716
1717 static void virtio_pci_device_unplugged(DeviceState *d)
1718 {
1719 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1720 bool modern = virtio_pci_modern(proxy);
1721 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
1722
1723 virtio_pci_stop_ioeventfd(proxy);
1724
1725 if (modern) {
1726 virtio_pci_modern_mem_region_unmap(proxy, &proxy->common);
1727 virtio_pci_modern_mem_region_unmap(proxy, &proxy->isr);
1728 virtio_pci_modern_mem_region_unmap(proxy, &proxy->device);
1729 virtio_pci_modern_mem_region_unmap(proxy, &proxy->notify);
1730 if (modern_pio) {
1731 virtio_pci_modern_io_region_unmap(proxy, &proxy->notify_pio);
1732 }
1733 }
1734 }
1735
1736 static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
1737 {
1738 VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
1739 VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev);
1740 bool pcie_port = pci_bus_is_express(pci_dev->bus) &&
1741 !pci_bus_is_root(pci_dev->bus);
1742
1743 if (!kvm_has_many_ioeventfds()) {
1744 proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
1745 }
1746
1747 /*
1748 * virtio pci bar layout used by default.
1749 * subclasses can re-arrange things if needed.
1750 *
1751 * region 0 -- virtio legacy io bar
1752 * region 1 -- msi-x bar
1753 * region 4+5 -- virtio modern memory (64bit) bar
1754 *
1755 */
1756 proxy->legacy_io_bar_idx = 0;
1757 proxy->msix_bar_idx = 1;
1758 proxy->modern_io_bar_idx = 2;
1759 proxy->modern_mem_bar_idx = 4;
1760
1761 proxy->common.offset = 0x0;
1762 proxy->common.size = 0x1000;
1763 proxy->common.type = VIRTIO_PCI_CAP_COMMON_CFG;
1764
1765 proxy->isr.offset = 0x1000;
1766 proxy->isr.size = 0x1000;
1767 proxy->isr.type = VIRTIO_PCI_CAP_ISR_CFG;
1768
1769 proxy->device.offset = 0x2000;
1770 proxy->device.size = 0x1000;
1771 proxy->device.type = VIRTIO_PCI_CAP_DEVICE_CFG;
1772
1773 proxy->notify.offset = 0x3000;
1774 proxy->notify.size = virtio_pci_queue_mem_mult(proxy) * VIRTIO_QUEUE_MAX;
1775 proxy->notify.type = VIRTIO_PCI_CAP_NOTIFY_CFG;
1776
1777 proxy->notify_pio.offset = 0x0;
1778 proxy->notify_pio.size = 0x4;
1779 proxy->notify_pio.type = VIRTIO_PCI_CAP_NOTIFY_CFG;
1780
1781 /* subclasses can enforce modern, so do this unconditionally */
1782 memory_region_init(&proxy->modern_bar, OBJECT(proxy), "virtio-pci",
1783 /* PCI BAR regions must be powers of 2 */
1784 pow2ceil(proxy->notify.offset + proxy->notify.size));
1785
1786 memory_region_init_alias(&proxy->modern_cfg,
1787 OBJECT(proxy),
1788 "virtio-pci-cfg",
1789 &proxy->modern_bar,
1790 0,
1791 memory_region_size(&proxy->modern_bar));
1792
1793 address_space_init(&proxy->modern_as, &proxy->modern_cfg, "virtio-pci-cfg-as");
1794
1795 if (proxy->disable_legacy == ON_OFF_AUTO_AUTO) {
1796 proxy->disable_legacy = pcie_port ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF;
1797 }
1798
1799 if (!virtio_pci_modern(proxy) && !virtio_pci_legacy(proxy)) {
1800 error_setg(errp, "device cannot work as neither modern nor legacy mode"
1801 " is enabled");
1802 error_append_hint(errp, "Set either disable-modern or disable-legacy"
1803 " to off\n");
1804 return;
1805 }
1806
1807 if (pcie_port && pci_is_express(pci_dev)) {
1808 int pos;
1809
1810 pos = pcie_endpoint_cap_init(pci_dev, 0);
1811 assert(pos > 0);
1812
1813 pos = pci_add_capability(pci_dev, PCI_CAP_ID_PM, 0, PCI_PM_SIZEOF);
1814 assert(pos > 0);
1815 pci_dev->exp.pm_cap = pos;
1816
1817 /*
1818 * Indicates that this function complies with revision 1.2 of the
1819 * PCI Power Management Interface Specification.
1820 */
1821 pci_set_word(pci_dev->config + pos + PCI_PM_PMC, 0x3);
1822
1823 if (proxy->flags & VIRTIO_PCI_FLAG_INIT_DEVERR) {
1824 /* Init error enabling flags */
1825 pcie_cap_deverr_init(pci_dev);
1826 }
1827
1828 if (proxy->flags & VIRTIO_PCI_FLAG_INIT_LNKCTL) {
1829 /* Init Link Control Register */
1830 pcie_cap_lnkctl_init(pci_dev);
1831 }
1832
1833 if (proxy->flags & VIRTIO_PCI_FLAG_INIT_PM) {
1834 /* Init Power Management Control Register */
1835 pci_set_word(pci_dev->wmask + pos + PCI_PM_CTRL,
1836 PCI_PM_CTRL_STATE_MASK);
1837 }
1838
1839 if (proxy->flags & VIRTIO_PCI_FLAG_ATS) {
1840 pcie_ats_init(pci_dev, 256);
1841 }
1842
1843 } else {
1844 /*
1845 * make future invocations of pci_is_express() return false
1846 * and pci_config_size() return PCI_CONFIG_SPACE_SIZE.
1847 */
1848 pci_dev->cap_present &= ~QEMU_PCI_CAP_EXPRESS;
1849 }
1850
1851 virtio_pci_bus_new(&proxy->bus, sizeof(proxy->bus), proxy);
1852 if (k->realize) {
1853 k->realize(proxy, errp);
1854 }
1855 }
1856
1857 static void virtio_pci_exit(PCIDevice *pci_dev)
1858 {
1859 VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
1860
1861 msix_uninit_exclusive_bar(pci_dev);
1862 address_space_destroy(&proxy->modern_as);
1863 }
1864
1865 static void virtio_pci_reset(DeviceState *qdev)
1866 {
1867 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
1868 VirtioBusState *bus = VIRTIO_BUS(&proxy->bus);
1869 PCIDevice *dev = PCI_DEVICE(qdev);
1870 int i;
1871
1872 virtio_pci_stop_ioeventfd(proxy);
1873 virtio_bus_reset(bus);
1874 msix_unuse_all_vectors(&proxy->pci_dev);
1875
1876 for (i = 0; i < VIRTIO_QUEUE_MAX; i++) {
1877 proxy->vqs[i].enabled = 0;
1878 proxy->vqs[i].num = 0;
1879 proxy->vqs[i].desc[0] = proxy->vqs[i].desc[1] = 0;
1880 proxy->vqs[i].avail[0] = proxy->vqs[i].avail[1] = 0;
1881 proxy->vqs[i].used[0] = proxy->vqs[i].used[1] = 0;
1882 }
1883
1884 if (pci_is_express(dev)) {
1885 pcie_cap_deverr_reset(dev);
1886 pcie_cap_lnkctl_reset(dev);
1887
1888 pci_set_word(dev->config + dev->exp.pm_cap + PCI_PM_CTRL, 0);
1889 }
1890 }
1891
1892 static Property virtio_pci_properties[] = {
1893 DEFINE_PROP_BIT("virtio-pci-bus-master-bug-migration", VirtIOPCIProxy, flags,
1894 VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT, false),
1895 DEFINE_PROP_ON_OFF_AUTO("disable-legacy", VirtIOPCIProxy, disable_legacy,
1896 ON_OFF_AUTO_AUTO),
1897 DEFINE_PROP_BOOL("disable-modern", VirtIOPCIProxy, disable_modern, false),
1898 DEFINE_PROP_BIT("migrate-extra", VirtIOPCIProxy, flags,
1899 VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT, true),
1900 DEFINE_PROP_BIT("modern-pio-notify", VirtIOPCIProxy, flags,
1901 VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT, false),
1902 DEFINE_PROP_BIT("x-disable-pcie", VirtIOPCIProxy, flags,
1903 VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT, false),
1904 DEFINE_PROP_BIT("page-per-vq", VirtIOPCIProxy, flags,
1905 VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT, false),
1906 DEFINE_PROP_BOOL("x-ignore-backend-features", VirtIOPCIProxy,
1907 ignore_backend_features, false),
1908 DEFINE_PROP_BIT("ats", VirtIOPCIProxy, flags,
1909 VIRTIO_PCI_FLAG_ATS_BIT, false),
1910 DEFINE_PROP_BIT("x-pcie-deverr-init", VirtIOPCIProxy, flags,
1911 VIRTIO_PCI_FLAG_INIT_DEVERR_BIT, true),
1912 DEFINE_PROP_BIT("x-pcie-lnkctl-init", VirtIOPCIProxy, flags,
1913 VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT, true),
1914 DEFINE_PROP_BIT("x-pcie-pm-init", VirtIOPCIProxy, flags,
1915 VIRTIO_PCI_FLAG_INIT_PM_BIT, true),
1916 DEFINE_PROP_END_OF_LIST(),
1917 };
1918
1919 static void virtio_pci_dc_realize(DeviceState *qdev, Error **errp)
1920 {
1921 VirtioPCIClass *vpciklass = VIRTIO_PCI_GET_CLASS(qdev);
1922 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
1923 PCIDevice *pci_dev = &proxy->pci_dev;
1924
1925 if (!(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_PCIE) &&
1926 virtio_pci_modern(proxy)) {
1927 pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
1928 }
1929
1930 vpciklass->parent_dc_realize(qdev, errp);
1931 }
1932
1933 static void virtio_pci_class_init(ObjectClass *klass, void *data)
1934 {
1935 DeviceClass *dc = DEVICE_CLASS(klass);
1936 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1937 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
1938
1939 dc->props = virtio_pci_properties;
1940 k->realize = virtio_pci_realize;
1941 k->exit = virtio_pci_exit;
1942 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1943 k->revision = VIRTIO_PCI_ABI_VERSION;
1944 k->class_id = PCI_CLASS_OTHERS;
1945 vpciklass->parent_dc_realize = dc->realize;
1946 dc->realize = virtio_pci_dc_realize;
1947 dc->reset = virtio_pci_reset;
1948 }
1949
1950 static const TypeInfo virtio_pci_info = {
1951 .name = TYPE_VIRTIO_PCI,
1952 .parent = TYPE_PCI_DEVICE,
1953 .instance_size = sizeof(VirtIOPCIProxy),
1954 .class_init = virtio_pci_class_init,
1955 .class_size = sizeof(VirtioPCIClass),
1956 .abstract = true,
1957 };
1958
1959 /* virtio-blk-pci */
1960
1961 static Property virtio_blk_pci_properties[] = {
1962 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
1963 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1964 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1965 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
1966 DEFINE_PROP_END_OF_LIST(),
1967 };
1968
1969 static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
1970 {
1971 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
1972 DeviceState *vdev = DEVICE(&dev->vdev);
1973
1974 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1975 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
1976 }
1977
1978 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
1979 {
1980 DeviceClass *dc = DEVICE_CLASS(klass);
1981 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1982 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1983
1984 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1985 dc->props = virtio_blk_pci_properties;
1986 k->realize = virtio_blk_pci_realize;
1987 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1988 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
1989 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1990 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
1991 }
1992
1993 static void virtio_blk_pci_instance_init(Object *obj)
1994 {
1995 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
1996
1997 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1998 TYPE_VIRTIO_BLK);
1999 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread",
2000 &error_abort);
2001 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
2002 "bootindex", &error_abort);
2003 }
2004
2005 static const TypeInfo virtio_blk_pci_info = {
2006 .name = TYPE_VIRTIO_BLK_PCI,
2007 .parent = TYPE_VIRTIO_PCI,
2008 .instance_size = sizeof(VirtIOBlkPCI),
2009 .instance_init = virtio_blk_pci_instance_init,
2010 .class_init = virtio_blk_pci_class_init,
2011 };
2012
2013 /* virtio-scsi-pci */
2014
2015 static Property virtio_scsi_pci_properties[] = {
2016 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
2017 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
2018 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
2019 DEV_NVECTORS_UNSPECIFIED),
2020 DEFINE_PROP_END_OF_LIST(),
2021 };
2022
2023 static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2024 {
2025 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev);
2026 DeviceState *vdev = DEVICE(&dev->vdev);
2027 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
2028 DeviceState *proxy = DEVICE(vpci_dev);
2029 char *bus_name;
2030
2031 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2032 vpci_dev->nvectors = vs->conf.num_queues + 3;
2033 }
2034
2035 /*
2036 * For command line compatibility, this sets the virtio-scsi-device bus
2037 * name as before.
2038 */
2039 if (proxy->id) {
2040 bus_name = g_strdup_printf("%s.0", proxy->id);
2041 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
2042 g_free(bus_name);
2043 }
2044
2045 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2046 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2047 }
2048
2049 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data)
2050 {
2051 DeviceClass *dc = DEVICE_CLASS(klass);
2052 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2053 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2054
2055 k->realize = virtio_scsi_pci_realize;
2056 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2057 dc->props = virtio_scsi_pci_properties;
2058 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2059 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
2060 pcidev_k->revision = 0x00;
2061 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
2062 }
2063
2064 static void virtio_scsi_pci_instance_init(Object *obj)
2065 {
2066 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
2067
2068 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2069 TYPE_VIRTIO_SCSI);
2070 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev), "iothread",
2071 &error_abort);
2072 }
2073
2074 static const TypeInfo virtio_scsi_pci_info = {
2075 .name = TYPE_VIRTIO_SCSI_PCI,
2076 .parent = TYPE_VIRTIO_PCI,
2077 .instance_size = sizeof(VirtIOSCSIPCI),
2078 .instance_init = virtio_scsi_pci_instance_init,
2079 .class_init = virtio_scsi_pci_class_init,
2080 };
2081
2082 /* vhost-scsi-pci */
2083
2084 #ifdef CONFIG_VHOST_SCSI
2085 static Property vhost_scsi_pci_properties[] = {
2086 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
2087 DEV_NVECTORS_UNSPECIFIED),
2088 DEFINE_PROP_END_OF_LIST(),
2089 };
2090
2091 static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2092 {
2093 VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev);
2094 DeviceState *vdev = DEVICE(&dev->vdev);
2095 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
2096
2097 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2098 vpci_dev->nvectors = vs->conf.num_queues + 3;
2099 }
2100
2101 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2102 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2103 }
2104
2105 static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data)
2106 {
2107 DeviceClass *dc = DEVICE_CLASS(klass);
2108 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2109 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2110 k->realize = vhost_scsi_pci_realize;
2111 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2112 dc->props = vhost_scsi_pci_properties;
2113 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2114 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
2115 pcidev_k->revision = 0x00;
2116 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
2117 }
2118
2119 static void vhost_scsi_pci_instance_init(Object *obj)
2120 {
2121 VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj);
2122
2123 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2124 TYPE_VHOST_SCSI);
2125 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
2126 "bootindex", &error_abort);
2127 }
2128
2129 static const TypeInfo vhost_scsi_pci_info = {
2130 .name = TYPE_VHOST_SCSI_PCI,
2131 .parent = TYPE_VIRTIO_PCI,
2132 .instance_size = sizeof(VHostSCSIPCI),
2133 .instance_init = vhost_scsi_pci_instance_init,
2134 .class_init = vhost_scsi_pci_class_init,
2135 };
2136 #endif
2137
2138 /* vhost-vsock-pci */
2139
2140 #ifdef CONFIG_VHOST_VSOCK
2141 static Property vhost_vsock_pci_properties[] = {
2142 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
2143 DEFINE_PROP_END_OF_LIST(),
2144 };
2145
2146 static void vhost_vsock_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2147 {
2148 VHostVSockPCI *dev = VHOST_VSOCK_PCI(vpci_dev);
2149 DeviceState *vdev = DEVICE(&dev->vdev);
2150
2151 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2152 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2153 }
2154
2155 static void vhost_vsock_pci_class_init(ObjectClass *klass, void *data)
2156 {
2157 DeviceClass *dc = DEVICE_CLASS(klass);
2158 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2159 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2160 k->realize = vhost_vsock_pci_realize;
2161 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
2162 dc->props = vhost_vsock_pci_properties;
2163 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2164 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_VSOCK;
2165 pcidev_k->revision = 0x00;
2166 pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
2167 }
2168
2169 static void vhost_vsock_pci_instance_init(Object *obj)
2170 {
2171 VHostVSockPCI *dev = VHOST_VSOCK_PCI(obj);
2172
2173 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2174 TYPE_VHOST_VSOCK);
2175 }
2176
2177 static const TypeInfo vhost_vsock_pci_info = {
2178 .name = TYPE_VHOST_VSOCK_PCI,
2179 .parent = TYPE_VIRTIO_PCI,
2180 .instance_size = sizeof(VHostVSockPCI),
2181 .instance_init = vhost_vsock_pci_instance_init,
2182 .class_init = vhost_vsock_pci_class_init,
2183 };
2184 #endif
2185
2186 /* virtio-balloon-pci */
2187
2188 static Property virtio_balloon_pci_properties[] = {
2189 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
2190 DEFINE_PROP_END_OF_LIST(),
2191 };
2192
2193 static void virtio_balloon_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2194 {
2195 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev);
2196 DeviceState *vdev = DEVICE(&dev->vdev);
2197
2198 if (vpci_dev->class_code != PCI_CLASS_OTHERS &&
2199 vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */
2200 vpci_dev->class_code = PCI_CLASS_OTHERS;
2201 }
2202
2203 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2204 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2205 }
2206
2207 static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data)
2208 {
2209 DeviceClass *dc = DEVICE_CLASS(klass);
2210 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2211 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2212 k->realize = virtio_balloon_pci_realize;
2213 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
2214 dc->props = virtio_balloon_pci_properties;
2215 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2216 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON;
2217 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
2218 pcidev_k->class_id = PCI_CLASS_OTHERS;
2219 }
2220
2221 static void virtio_balloon_pci_instance_init(Object *obj)
2222 {
2223 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj);
2224
2225 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2226 TYPE_VIRTIO_BALLOON);
2227 object_property_add_alias(obj, "guest-stats", OBJECT(&dev->vdev),
2228 "guest-stats", &error_abort);
2229 object_property_add_alias(obj, "guest-stats-polling-interval",
2230 OBJECT(&dev->vdev),
2231 "guest-stats-polling-interval", &error_abort);
2232 }
2233
2234 static const TypeInfo virtio_balloon_pci_info = {
2235 .name = TYPE_VIRTIO_BALLOON_PCI,
2236 .parent = TYPE_VIRTIO_PCI,
2237 .instance_size = sizeof(VirtIOBalloonPCI),
2238 .instance_init = virtio_balloon_pci_instance_init,
2239 .class_init = virtio_balloon_pci_class_init,
2240 };
2241
2242 /* virtio-serial-pci */
2243
2244 static void virtio_serial_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2245 {
2246 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev);
2247 DeviceState *vdev = DEVICE(&dev->vdev);
2248 DeviceState *proxy = DEVICE(vpci_dev);
2249 char *bus_name;
2250
2251 if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
2252 vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
2253 vpci_dev->class_code != PCI_CLASS_OTHERS) { /* qemu-kvm */
2254 vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER;
2255 }
2256
2257 /* backwards-compatibility with machines that were created with
2258 DEV_NVECTORS_UNSPECIFIED */
2259 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2260 vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1;
2261 }
2262
2263 /*
2264 * For command line compatibility, this sets the virtio-serial-device bus
2265 * name as before.
2266 */
2267 if (proxy->id) {
2268 bus_name = g_strdup_printf("%s.0", proxy->id);
2269 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
2270 g_free(bus_name);
2271 }
2272
2273 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2274 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2275 }
2276
2277 static Property virtio_serial_pci_properties[] = {
2278 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
2279 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
2280 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
2281 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
2282 DEFINE_PROP_END_OF_LIST(),
2283 };
2284
2285 static void virtio_serial_pci_class_init(ObjectClass *klass, void *data)
2286 {
2287 DeviceClass *dc = DEVICE_CLASS(klass);
2288 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2289 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2290 k->realize = virtio_serial_pci_realize;
2291 set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
2292 dc->props = virtio_serial_pci_properties;
2293 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2294 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE;
2295 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
2296 pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
2297 }
2298
2299 static void virtio_serial_pci_instance_init(Object *obj)
2300 {
2301 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj);
2302
2303 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2304 TYPE_VIRTIO_SERIAL);
2305 }
2306
2307 static const TypeInfo virtio_serial_pci_info = {
2308 .name = TYPE_VIRTIO_SERIAL_PCI,
2309 .parent = TYPE_VIRTIO_PCI,
2310 .instance_size = sizeof(VirtIOSerialPCI),
2311 .instance_init = virtio_serial_pci_instance_init,
2312 .class_init = virtio_serial_pci_class_init,
2313 };
2314
2315 /* virtio-net-pci */
2316
2317 static Property virtio_net_properties[] = {
2318 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
2319 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
2320 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
2321 DEFINE_PROP_END_OF_LIST(),
2322 };
2323
2324 static void virtio_net_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2325 {
2326 DeviceState *qdev = DEVICE(vpci_dev);
2327 VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev);
2328 DeviceState *vdev = DEVICE(&dev->vdev);
2329
2330 virtio_net_set_netclient_name(&dev->vdev, qdev->id,
2331 object_get_typename(OBJECT(qdev)));
2332 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2333 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2334 }
2335
2336 static void virtio_net_pci_class_init(ObjectClass *klass, void *data)
2337 {
2338 DeviceClass *dc = DEVICE_CLASS(klass);
2339 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
2340 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
2341
2342 k->romfile = "efi-virtio.rom";
2343 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2344 k->device_id = PCI_DEVICE_ID_VIRTIO_NET;
2345 k->revision = VIRTIO_PCI_ABI_VERSION;
2346 k->class_id = PCI_CLASS_NETWORK_ETHERNET;
2347 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
2348 dc->props = virtio_net_properties;
2349 vpciklass->realize = virtio_net_pci_realize;
2350 }
2351
2352 static void virtio_net_pci_instance_init(Object *obj)
2353 {
2354 VirtIONetPCI *dev = VIRTIO_NET_PCI(obj);
2355
2356 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2357 TYPE_VIRTIO_NET);
2358 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
2359 "bootindex", &error_abort);
2360 }
2361
2362 static const TypeInfo virtio_net_pci_info = {
2363 .name = TYPE_VIRTIO_NET_PCI,
2364 .parent = TYPE_VIRTIO_PCI,
2365 .instance_size = sizeof(VirtIONetPCI),
2366 .instance_init = virtio_net_pci_instance_init,
2367 .class_init = virtio_net_pci_class_init,
2368 };
2369
2370 /* virtio-rng-pci */
2371
2372 static void virtio_rng_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2373 {
2374 VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev);
2375 DeviceState *vdev = DEVICE(&vrng->vdev);
2376 Error *err = NULL;
2377
2378 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2379 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
2380 if (err) {
2381 error_propagate(errp, err);
2382 return;
2383 }
2384
2385 object_property_set_link(OBJECT(vrng),
2386 OBJECT(vrng->vdev.conf.rng), "rng",
2387 NULL);
2388 }
2389
2390 static void virtio_rng_pci_class_init(ObjectClass *klass, void *data)
2391 {
2392 DeviceClass *dc = DEVICE_CLASS(klass);
2393 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2394 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2395
2396 k->realize = virtio_rng_pci_realize;
2397 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
2398
2399 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2400 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG;
2401 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
2402 pcidev_k->class_id = PCI_CLASS_OTHERS;
2403 }
2404
2405 static void virtio_rng_initfn(Object *obj)
2406 {
2407 VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj);
2408
2409 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2410 TYPE_VIRTIO_RNG);
2411 object_property_add_alias(obj, "rng", OBJECT(&dev->vdev), "rng",
2412 &error_abort);
2413 }
2414
2415 static const TypeInfo virtio_rng_pci_info = {
2416 .name = TYPE_VIRTIO_RNG_PCI,
2417 .parent = TYPE_VIRTIO_PCI,
2418 .instance_size = sizeof(VirtIORngPCI),
2419 .instance_init = virtio_rng_initfn,
2420 .class_init = virtio_rng_pci_class_init,
2421 };
2422
2423 /* virtio-input-pci */
2424
2425 static Property virtio_input_pci_properties[] = {
2426 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
2427 DEFINE_PROP_END_OF_LIST(),
2428 };
2429
2430 static void virtio_input_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2431 {
2432 VirtIOInputPCI *vinput = VIRTIO_INPUT_PCI(vpci_dev);
2433 DeviceState *vdev = DEVICE(&vinput->vdev);
2434
2435 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2436 virtio_pci_force_virtio_1(vpci_dev);
2437 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2438 }
2439
2440 static void virtio_input_pci_class_init(ObjectClass *klass, void *data)
2441 {
2442 DeviceClass *dc = DEVICE_CLASS(klass);
2443 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2444 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2445
2446 dc->props = virtio_input_pci_properties;
2447 k->realize = virtio_input_pci_realize;
2448 set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
2449
2450 pcidev_k->class_id = PCI_CLASS_INPUT_OTHER;
2451 }
2452
2453 static void virtio_input_hid_kbd_pci_class_init(ObjectClass *klass, void *data)
2454 {
2455 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2456
2457 pcidev_k->class_id = PCI_CLASS_INPUT_KEYBOARD;
2458 }
2459
2460 static void virtio_input_hid_mouse_pci_class_init(ObjectClass *klass,
2461 void *data)
2462 {
2463 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2464
2465 pcidev_k->class_id = PCI_CLASS_INPUT_MOUSE;
2466 }
2467
2468 static void virtio_keyboard_initfn(Object *obj)
2469 {
2470 VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj);
2471
2472 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2473 TYPE_VIRTIO_KEYBOARD);
2474 }
2475
2476 static void virtio_mouse_initfn(Object *obj)
2477 {
2478 VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj);
2479
2480 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2481 TYPE_VIRTIO_MOUSE);
2482 }
2483
2484 static void virtio_tablet_initfn(Object *obj)
2485 {
2486 VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj);
2487
2488 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2489 TYPE_VIRTIO_TABLET);
2490 }
2491
2492 static const TypeInfo virtio_input_pci_info = {
2493 .name = TYPE_VIRTIO_INPUT_PCI,
2494 .parent = TYPE_VIRTIO_PCI,
2495 .instance_size = sizeof(VirtIOInputPCI),
2496 .class_init = virtio_input_pci_class_init,
2497 .abstract = true,
2498 };
2499
2500 static const TypeInfo virtio_input_hid_pci_info = {
2501 .name = TYPE_VIRTIO_INPUT_HID_PCI,
2502 .parent = TYPE_VIRTIO_INPUT_PCI,
2503 .instance_size = sizeof(VirtIOInputHIDPCI),
2504 .abstract = true,
2505 };
2506
2507 static const TypeInfo virtio_keyboard_pci_info = {
2508 .name = TYPE_VIRTIO_KEYBOARD_PCI,
2509 .parent = TYPE_VIRTIO_INPUT_HID_PCI,
2510 .class_init = virtio_input_hid_kbd_pci_class_init,
2511 .instance_size = sizeof(VirtIOInputHIDPCI),
2512 .instance_init = virtio_keyboard_initfn,
2513 };
2514
2515 static const TypeInfo virtio_mouse_pci_info = {
2516 .name = TYPE_VIRTIO_MOUSE_PCI,
2517 .parent = TYPE_VIRTIO_INPUT_HID_PCI,
2518 .class_init = virtio_input_hid_mouse_pci_class_init,
2519 .instance_size = sizeof(VirtIOInputHIDPCI),
2520 .instance_init = virtio_mouse_initfn,
2521 };
2522
2523 static const TypeInfo virtio_tablet_pci_info = {
2524 .name = TYPE_VIRTIO_TABLET_PCI,
2525 .parent = TYPE_VIRTIO_INPUT_HID_PCI,
2526 .instance_size = sizeof(VirtIOInputHIDPCI),
2527 .instance_init = virtio_tablet_initfn,
2528 };
2529
2530 #ifdef CONFIG_LINUX
2531 static void virtio_host_initfn(Object *obj)
2532 {
2533 VirtIOInputHostPCI *dev = VIRTIO_INPUT_HOST_PCI(obj);
2534
2535 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2536 TYPE_VIRTIO_INPUT_HOST);
2537 }
2538
2539 static const TypeInfo virtio_host_pci_info = {
2540 .name = TYPE_VIRTIO_INPUT_HOST_PCI,
2541 .parent = TYPE_VIRTIO_INPUT_PCI,
2542 .instance_size = sizeof(VirtIOInputHostPCI),
2543 .instance_init = virtio_host_initfn,
2544 };
2545 #endif
2546
2547 /* virtio-pci-bus */
2548
2549 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
2550 VirtIOPCIProxy *dev)
2551 {
2552 DeviceState *qdev = DEVICE(dev);
2553 char virtio_bus_name[] = "virtio-bus";
2554
2555 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_PCI_BUS, qdev,
2556 virtio_bus_name);
2557 }
2558
2559 static void virtio_pci_bus_class_init(ObjectClass *klass, void *data)
2560 {
2561 BusClass *bus_class = BUS_CLASS(klass);
2562 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
2563 bus_class->max_dev = 1;
2564 k->notify = virtio_pci_notify;
2565 k->save_config = virtio_pci_save_config;
2566 k->load_config = virtio_pci_load_config;
2567 k->save_queue = virtio_pci_save_queue;
2568 k->load_queue = virtio_pci_load_queue;
2569 k->save_extra_state = virtio_pci_save_extra_state;
2570 k->load_extra_state = virtio_pci_load_extra_state;
2571 k->has_extra_state = virtio_pci_has_extra_state;
2572 k->query_guest_notifiers = virtio_pci_query_guest_notifiers;
2573 k->set_guest_notifiers = virtio_pci_set_guest_notifiers;
2574 k->vmstate_change = virtio_pci_vmstate_change;
2575 k->pre_plugged = virtio_pci_pre_plugged;
2576 k->device_plugged = virtio_pci_device_plugged;
2577 k->device_unplugged = virtio_pci_device_unplugged;
2578 k->query_nvectors = virtio_pci_query_nvectors;
2579 k->ioeventfd_enabled = virtio_pci_ioeventfd_enabled;
2580 k->ioeventfd_assign = virtio_pci_ioeventfd_assign;
2581 k->get_dma_as = virtio_pci_get_dma_as;
2582 }
2583
2584 static const TypeInfo virtio_pci_bus_info = {
2585 .name = TYPE_VIRTIO_PCI_BUS,
2586 .parent = TYPE_VIRTIO_BUS,
2587 .instance_size = sizeof(VirtioPCIBusState),
2588 .class_init = virtio_pci_bus_class_init,
2589 };
2590
2591 static void virtio_pci_register_types(void)
2592 {
2593 type_register_static(&virtio_rng_pci_info);
2594 type_register_static(&virtio_input_pci_info);
2595 type_register_static(&virtio_input_hid_pci_info);
2596 type_register_static(&virtio_keyboard_pci_info);
2597 type_register_static(&virtio_mouse_pci_info);
2598 type_register_static(&virtio_tablet_pci_info);
2599 #ifdef CONFIG_LINUX
2600 type_register_static(&virtio_host_pci_info);
2601 #endif
2602 type_register_static(&virtio_pci_bus_info);
2603 type_register_static(&virtio_pci_info);
2604 #ifdef CONFIG_VIRTFS
2605 type_register_static(&virtio_9p_pci_info);
2606 #endif
2607 type_register_static(&virtio_blk_pci_info);
2608 type_register_static(&virtio_scsi_pci_info);
2609 type_register_static(&virtio_balloon_pci_info);
2610 type_register_static(&virtio_serial_pci_info);
2611 type_register_static(&virtio_net_pci_info);
2612 #ifdef CONFIG_VHOST_SCSI
2613 type_register_static(&vhost_scsi_pci_info);
2614 #endif
2615 #ifdef CONFIG_VHOST_VSOCK
2616 type_register_static(&vhost_vsock_pci_info);
2617 #endif
2618 }
2619
2620 type_init(virtio_pci_register_types)