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virtio: access ISR atomically
[qemu.git] / hw / virtio / virtio-pci.c
blob521ba0b41567dc1bae52e8ff56fe7e3609023e45
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 int virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy,
1148 struct virtio_pci_cap *cap)
1149 {
1150 PCIDevice *dev = &proxy->pci_dev;
1151 int offset;
1152
1153 offset = pci_add_capability(dev, PCI_CAP_ID_VNDR, 0, cap->cap_len);
1154 assert(offset > 0);
1155
1156 assert(cap->cap_len >= sizeof *cap);
1157 memcpy(dev->config + offset + PCI_CAP_FLAGS, &cap->cap_len,
1158 cap->cap_len - PCI_CAP_FLAGS);
1159
1160 return offset;
1161 }
1162
1163 static uint64_t virtio_pci_common_read(void *opaque, hwaddr addr,
1164 unsigned size)
1165 {
1166 VirtIOPCIProxy *proxy = opaque;
1167 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1168 uint32_t val = 0;
1169 int i;
1170
1171 switch (addr) {
1172 case VIRTIO_PCI_COMMON_DFSELECT:
1173 val = proxy->dfselect;
1174 break;
1175 case VIRTIO_PCI_COMMON_DF:
1176 if (proxy->dfselect <= 1) {
1177 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
1178
1179 val = (vdev->host_features & ~vdc->legacy_features) >>
1180 (32 * proxy->dfselect);
1181 }
1182 break;
1183 case VIRTIO_PCI_COMMON_GFSELECT:
1184 val = proxy->gfselect;
1185 break;
1186 case VIRTIO_PCI_COMMON_GF:
1187 if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) {
1188 val = proxy->guest_features[proxy->gfselect];
1189 }
1190 break;
1191 case VIRTIO_PCI_COMMON_MSIX:
1192 val = vdev->config_vector;
1193 break;
1194 case VIRTIO_PCI_COMMON_NUMQ:
1195 for (i = 0; i < VIRTIO_QUEUE_MAX; ++i) {
1196 if (virtio_queue_get_num(vdev, i)) {
1197 val = i + 1;
1198 }
1199 }
1200 break;
1201 case VIRTIO_PCI_COMMON_STATUS:
1202 val = vdev->status;
1203 break;
1204 case VIRTIO_PCI_COMMON_CFGGENERATION:
1205 val = vdev->generation;
1206 break;
1207 case VIRTIO_PCI_COMMON_Q_SELECT:
1208 val = vdev->queue_sel;
1209 break;
1210 case VIRTIO_PCI_COMMON_Q_SIZE:
1211 val = virtio_queue_get_num(vdev, vdev->queue_sel);
1212 break;
1213 case VIRTIO_PCI_COMMON_Q_MSIX:
1214 val = virtio_queue_vector(vdev, vdev->queue_sel);
1215 break;
1216 case VIRTIO_PCI_COMMON_Q_ENABLE:
1217 val = proxy->vqs[vdev->queue_sel].enabled;
1218 break;
1219 case VIRTIO_PCI_COMMON_Q_NOFF:
1220 /* Simply map queues in order */
1221 val = vdev->queue_sel;
1222 break;
1223 case VIRTIO_PCI_COMMON_Q_DESCLO:
1224 val = proxy->vqs[vdev->queue_sel].desc[0];
1225 break;
1226 case VIRTIO_PCI_COMMON_Q_DESCHI:
1227 val = proxy->vqs[vdev->queue_sel].desc[1];
1228 break;
1229 case VIRTIO_PCI_COMMON_Q_AVAILLO:
1230 val = proxy->vqs[vdev->queue_sel].avail[0];
1231 break;
1232 case VIRTIO_PCI_COMMON_Q_AVAILHI:
1233 val = proxy->vqs[vdev->queue_sel].avail[1];
1234 break;
1235 case VIRTIO_PCI_COMMON_Q_USEDLO:
1236 val = proxy->vqs[vdev->queue_sel].used[0];
1237 break;
1238 case VIRTIO_PCI_COMMON_Q_USEDHI:
1239 val = proxy->vqs[vdev->queue_sel].used[1];
1240 break;
1241 default:
1242 val = 0;
1243 }
1244
1245 return val;
1246 }
1247
1248 static void virtio_pci_common_write(void *opaque, hwaddr addr,
1249 uint64_t val, unsigned size)
1250 {
1251 VirtIOPCIProxy *proxy = opaque;
1252 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1253
1254 switch (addr) {
1255 case VIRTIO_PCI_COMMON_DFSELECT:
1256 proxy->dfselect = val;
1257 break;
1258 case VIRTIO_PCI_COMMON_GFSELECT:
1259 proxy->gfselect = val;
1260 break;
1261 case VIRTIO_PCI_COMMON_GF:
1262 if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) {
1263 proxy->guest_features[proxy->gfselect] = val;
1264 virtio_set_features(vdev,
1265 (((uint64_t)proxy->guest_features[1]) << 32) |
1266 proxy->guest_features[0]);
1267 }
1268 break;
1269 case VIRTIO_PCI_COMMON_MSIX:
1270 msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
1271 /* Make it possible for guest to discover an error took place. */
1272 if (msix_vector_use(&proxy->pci_dev, val) < 0) {
1273 val = VIRTIO_NO_VECTOR;
1274 }
1275 vdev->config_vector = val;
1276 break;
1277 case VIRTIO_PCI_COMMON_STATUS:
1278 if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
1279 virtio_pci_stop_ioeventfd(proxy);
1280 }
1281
1282 virtio_set_status(vdev, val & 0xFF);
1283
1284 if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
1285 virtio_pci_start_ioeventfd(proxy);
1286 }
1287
1288 if (vdev->status == 0) {
1289 virtio_pci_reset(DEVICE(proxy));
1290 }
1291
1292 break;
1293 case VIRTIO_PCI_COMMON_Q_SELECT:
1294 if (val < VIRTIO_QUEUE_MAX) {
1295 vdev->queue_sel = val;
1296 }
1297 break;
1298 case VIRTIO_PCI_COMMON_Q_SIZE:
1299 proxy->vqs[vdev->queue_sel].num = val;
1300 break;
1301 case VIRTIO_PCI_COMMON_Q_MSIX:
1302 msix_vector_unuse(&proxy->pci_dev,
1303 virtio_queue_vector(vdev, vdev->queue_sel));
1304 /* Make it possible for guest to discover an error took place. */
1305 if (msix_vector_use(&proxy->pci_dev, val) < 0) {
1306 val = VIRTIO_NO_VECTOR;
1307 }
1308 virtio_queue_set_vector(vdev, vdev->queue_sel, val);
1309 break;
1310 case VIRTIO_PCI_COMMON_Q_ENABLE:
1311 /* TODO: need a way to put num back on reset. */
1312 virtio_queue_set_num(vdev, vdev->queue_sel,
1313 proxy->vqs[vdev->queue_sel].num);
1314 virtio_queue_set_rings(vdev, vdev->queue_sel,
1315 ((uint64_t)proxy->vqs[vdev->queue_sel].desc[1]) << 32 |
1316 proxy->vqs[vdev->queue_sel].desc[0],
1317 ((uint64_t)proxy->vqs[vdev->queue_sel].avail[1]) << 32 |
1318 proxy->vqs[vdev->queue_sel].avail[0],
1319 ((uint64_t)proxy->vqs[vdev->queue_sel].used[1]) << 32 |
1320 proxy->vqs[vdev->queue_sel].used[0]);
1321 proxy->vqs[vdev->queue_sel].enabled = 1;
1322 break;
1323 case VIRTIO_PCI_COMMON_Q_DESCLO:
1324 proxy->vqs[vdev->queue_sel].desc[0] = val;
1325 break;
1326 case VIRTIO_PCI_COMMON_Q_DESCHI:
1327 proxy->vqs[vdev->queue_sel].desc[1] = val;
1328 break;
1329 case VIRTIO_PCI_COMMON_Q_AVAILLO:
1330 proxy->vqs[vdev->queue_sel].avail[0] = val;
1331 break;
1332 case VIRTIO_PCI_COMMON_Q_AVAILHI:
1333 proxy->vqs[vdev->queue_sel].avail[1] = val;
1334 break;
1335 case VIRTIO_PCI_COMMON_Q_USEDLO:
1336 proxy->vqs[vdev->queue_sel].used[0] = val;
1337 break;
1338 case VIRTIO_PCI_COMMON_Q_USEDHI:
1339 proxy->vqs[vdev->queue_sel].used[1] = val;
1340 break;
1341 default:
1342 break;
1343 }
1344 }
1345
1346
1347 static uint64_t virtio_pci_notify_read(void *opaque, hwaddr addr,
1348 unsigned size)
1349 {
1350 return 0;
1351 }
1352
1353 static void virtio_pci_notify_write(void *opaque, hwaddr addr,
1354 uint64_t val, unsigned size)
1355 {
1356 VirtIODevice *vdev = opaque;
1357 VirtIOPCIProxy *proxy = VIRTIO_PCI(DEVICE(vdev)->parent_bus->parent);
1358 unsigned queue = addr / virtio_pci_queue_mem_mult(proxy);
1359
1360 if (queue < VIRTIO_QUEUE_MAX) {
1361 virtio_queue_notify(vdev, queue);
1362 }
1363 }
1364
1365 static void virtio_pci_notify_write_pio(void *opaque, hwaddr addr,
1366 uint64_t val, unsigned size)
1367 {
1368 VirtIODevice *vdev = opaque;
1369 unsigned queue = val;
1370
1371 if (queue < VIRTIO_QUEUE_MAX) {
1372 virtio_queue_notify(vdev, queue);
1373 }
1374 }
1375
1376 static uint64_t virtio_pci_isr_read(void *opaque, hwaddr addr,
1377 unsigned size)
1378 {
1379 VirtIOPCIProxy *proxy = opaque;
1380 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1381 uint64_t val = atomic_xchg(&vdev->isr, 0);
1382 pci_irq_deassert(&proxy->pci_dev);
1383
1384 return val;
1385 }
1386
1387 static void virtio_pci_isr_write(void *opaque, hwaddr addr,
1388 uint64_t val, unsigned size)
1389 {
1390 }
1391
1392 static uint64_t virtio_pci_device_read(void *opaque, hwaddr addr,
1393 unsigned size)
1394 {
1395 VirtIODevice *vdev = opaque;
1396 uint64_t val = 0;
1397
1398 switch (size) {
1399 case 1:
1400 val = virtio_config_modern_readb(vdev, addr);
1401 break;
1402 case 2:
1403 val = virtio_config_modern_readw(vdev, addr);
1404 break;
1405 case 4:
1406 val = virtio_config_modern_readl(vdev, addr);
1407 break;
1408 }
1409 return val;
1410 }
1411
1412 static void virtio_pci_device_write(void *opaque, hwaddr addr,
1413 uint64_t val, unsigned size)
1414 {
1415 VirtIODevice *vdev = opaque;
1416 switch (size) {
1417 case 1:
1418 virtio_config_modern_writeb(vdev, addr, val);
1419 break;
1420 case 2:
1421 virtio_config_modern_writew(vdev, addr, val);
1422 break;
1423 case 4:
1424 virtio_config_modern_writel(vdev, addr, val);
1425 break;
1426 }
1427 }
1428
1429 static void virtio_pci_modern_regions_init(VirtIOPCIProxy *proxy)
1430 {
1431 static const MemoryRegionOps common_ops = {
1432 .read = virtio_pci_common_read,
1433 .write = virtio_pci_common_write,
1434 .impl = {
1435 .min_access_size = 1,
1436 .max_access_size = 4,
1437 },
1438 .endianness = DEVICE_LITTLE_ENDIAN,
1439 };
1440 static const MemoryRegionOps isr_ops = {
1441 .read = virtio_pci_isr_read,
1442 .write = virtio_pci_isr_write,
1443 .impl = {
1444 .min_access_size = 1,
1445 .max_access_size = 4,
1446 },
1447 .endianness = DEVICE_LITTLE_ENDIAN,
1448 };
1449 static const MemoryRegionOps device_ops = {
1450 .read = virtio_pci_device_read,
1451 .write = virtio_pci_device_write,
1452 .impl = {
1453 .min_access_size = 1,
1454 .max_access_size = 4,
1455 },
1456 .endianness = DEVICE_LITTLE_ENDIAN,
1457 };
1458 static const MemoryRegionOps notify_ops = {
1459 .read = virtio_pci_notify_read,
1460 .write = virtio_pci_notify_write,
1461 .impl = {
1462 .min_access_size = 1,
1463 .max_access_size = 4,
1464 },
1465 .endianness = DEVICE_LITTLE_ENDIAN,
1466 };
1467 static const MemoryRegionOps notify_pio_ops = {
1468 .read = virtio_pci_notify_read,
1469 .write = virtio_pci_notify_write_pio,
1470 .impl = {
1471 .min_access_size = 1,
1472 .max_access_size = 4,
1473 },
1474 .endianness = DEVICE_LITTLE_ENDIAN,
1475 };
1476
1477
1478 memory_region_init_io(&proxy->common.mr, OBJECT(proxy),
1479 &common_ops,
1480 proxy,
1481 "virtio-pci-common",
1482 proxy->common.size);
1483
1484 memory_region_init_io(&proxy->isr.mr, OBJECT(proxy),
1485 &isr_ops,
1486 proxy,
1487 "virtio-pci-isr",
1488 proxy->isr.size);
1489
1490 memory_region_init_io(&proxy->device.mr, OBJECT(proxy),
1491 &device_ops,
1492 virtio_bus_get_device(&proxy->bus),
1493 "virtio-pci-device",
1494 proxy->device.size);
1495
1496 memory_region_init_io(&proxy->notify.mr, OBJECT(proxy),
1497 &notify_ops,
1498 virtio_bus_get_device(&proxy->bus),
1499 "virtio-pci-notify",
1500 proxy->notify.size);
1501
1502 memory_region_init_io(&proxy->notify_pio.mr, OBJECT(proxy),
1503 &notify_pio_ops,
1504 virtio_bus_get_device(&proxy->bus),
1505 "virtio-pci-notify-pio",
1506 proxy->notify_pio.size);
1507 }
1508
1509 static void virtio_pci_modern_region_map(VirtIOPCIProxy *proxy,
1510 VirtIOPCIRegion *region,
1511 struct virtio_pci_cap *cap,
1512 MemoryRegion *mr,
1513 uint8_t bar)
1514 {
1515 memory_region_add_subregion(mr, region->offset, &region->mr);
1516
1517 cap->cfg_type = region->type;
1518 cap->bar = bar;
1519 cap->offset = cpu_to_le32(region->offset);
1520 cap->length = cpu_to_le32(region->size);
1521 virtio_pci_add_mem_cap(proxy, cap);
1522
1523 }
1524
1525 static void virtio_pci_modern_mem_region_map(VirtIOPCIProxy *proxy,
1526 VirtIOPCIRegion *region,
1527 struct virtio_pci_cap *cap)
1528 {
1529 virtio_pci_modern_region_map(proxy, region, cap,
1530 &proxy->modern_bar, proxy->modern_mem_bar_idx);
1531 }
1532
1533 static void virtio_pci_modern_io_region_map(VirtIOPCIProxy *proxy,
1534 VirtIOPCIRegion *region,
1535 struct virtio_pci_cap *cap)
1536 {
1537 virtio_pci_modern_region_map(proxy, region, cap,
1538 &proxy->io_bar, proxy->modern_io_bar_idx);
1539 }
1540
1541 static void virtio_pci_modern_mem_region_unmap(VirtIOPCIProxy *proxy,
1542 VirtIOPCIRegion *region)
1543 {
1544 memory_region_del_subregion(&proxy->modern_bar,
1545 &region->mr);
1546 }
1547
1548 static void virtio_pci_modern_io_region_unmap(VirtIOPCIProxy *proxy,
1549 VirtIOPCIRegion *region)
1550 {
1551 memory_region_del_subregion(&proxy->io_bar,
1552 &region->mr);
1553 }
1554
1555 static void virtio_pci_pre_plugged(DeviceState *d, Error **errp)
1556 {
1557 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1558 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1559
1560 if (virtio_pci_modern(proxy)) {
1561 virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1);
1562 }
1563
1564 virtio_add_feature(&vdev->host_features, VIRTIO_F_BAD_FEATURE);
1565 }
1566
1567 /* This is called by virtio-bus just after the device is plugged. */
1568 static void virtio_pci_device_plugged(DeviceState *d, Error **errp)
1569 {
1570 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1571 VirtioBusState *bus = &proxy->bus;
1572 bool legacy = virtio_pci_legacy(proxy);
1573 bool modern;
1574 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
1575 uint8_t *config;
1576 uint32_t size;
1577 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1578
1579 /*
1580 * Virtio capabilities present without
1581 * VIRTIO_F_VERSION_1 confuses guests
1582 */
1583 if (!virtio_has_feature(vdev->host_features, VIRTIO_F_VERSION_1)) {
1584 virtio_pci_disable_modern(proxy);
1585
1586 if (!legacy) {
1587 error_setg(errp, "Device doesn't support modern mode, and legacy"
1588 " mode is disabled");
1589 error_append_hint(errp, "Set disable-legacy to off\n");
1590
1591 return;
1592 }
1593 }
1594
1595 modern = virtio_pci_modern(proxy);
1596
1597 config = proxy->pci_dev.config;
1598 if (proxy->class_code) {
1599 pci_config_set_class(config, proxy->class_code);
1600 }
1601
1602 if (legacy) {
1603 /* legacy and transitional */
1604 pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID,
1605 pci_get_word(config + PCI_VENDOR_ID));
1606 pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus));
1607 } else {
1608 /* pure virtio-1.0 */
1609 pci_set_word(config + PCI_VENDOR_ID,
1610 PCI_VENDOR_ID_REDHAT_QUMRANET);
1611 pci_set_word(config + PCI_DEVICE_ID,
1612 0x1040 + virtio_bus_get_vdev_id(bus));
1613 pci_config_set_revision(config, 1);
1614 }
1615 config[PCI_INTERRUPT_PIN] = 1;
1616
1617
1618 if (modern) {
1619 struct virtio_pci_cap cap = {
1620 .cap_len = sizeof cap,
1621 };
1622 struct virtio_pci_notify_cap notify = {
1623 .cap.cap_len = sizeof notify,
1624 .notify_off_multiplier =
1625 cpu_to_le32(virtio_pci_queue_mem_mult(proxy)),
1626 };
1627 struct virtio_pci_cfg_cap cfg = {
1628 .cap.cap_len = sizeof cfg,
1629 .cap.cfg_type = VIRTIO_PCI_CAP_PCI_CFG,
1630 };
1631 struct virtio_pci_notify_cap notify_pio = {
1632 .cap.cap_len = sizeof notify,
1633 .notify_off_multiplier = cpu_to_le32(0x0),
1634 };
1635
1636 struct virtio_pci_cfg_cap *cfg_mask;
1637
1638 virtio_pci_modern_regions_init(proxy);
1639
1640 virtio_pci_modern_mem_region_map(proxy, &proxy->common, &cap);
1641 virtio_pci_modern_mem_region_map(proxy, &proxy->isr, &cap);
1642 virtio_pci_modern_mem_region_map(proxy, &proxy->device, &cap);
1643 virtio_pci_modern_mem_region_map(proxy, &proxy->notify, &notify.cap);
1644
1645 if (modern_pio) {
1646 memory_region_init(&proxy->io_bar, OBJECT(proxy),
1647 "virtio-pci-io", 0x4);
1648
1649 pci_register_bar(&proxy->pci_dev, proxy->modern_io_bar_idx,
1650 PCI_BASE_ADDRESS_SPACE_IO, &proxy->io_bar);
1651
1652 virtio_pci_modern_io_region_map(proxy, &proxy->notify_pio,
1653 &notify_pio.cap);
1654 }
1655
1656 pci_register_bar(&proxy->pci_dev, proxy->modern_mem_bar_idx,
1657 PCI_BASE_ADDRESS_SPACE_MEMORY |
1658 PCI_BASE_ADDRESS_MEM_PREFETCH |
1659 PCI_BASE_ADDRESS_MEM_TYPE_64,
1660 &proxy->modern_bar);
1661
1662 proxy->config_cap = virtio_pci_add_mem_cap(proxy, &cfg.cap);
1663 cfg_mask = (void *)(proxy->pci_dev.wmask + proxy->config_cap);
1664 pci_set_byte(&cfg_mask->cap.bar, ~0x0);
1665 pci_set_long((uint8_t *)&cfg_mask->cap.offset, ~0x0);
1666 pci_set_long((uint8_t *)&cfg_mask->cap.length, ~0x0);
1667 pci_set_long(cfg_mask->pci_cfg_data, ~0x0);
1668 }
1669
1670 if (proxy->nvectors) {
1671 int err = msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors,
1672 proxy->msix_bar_idx);
1673 if (err) {
1674 /* Notice when a system that supports MSIx can't initialize it. */
1675 if (err != -ENOTSUP) {
1676 error_report("unable to init msix vectors to %" PRIu32,
1677 proxy->nvectors);
1678 }
1679 proxy->nvectors = 0;
1680 }
1681 }
1682
1683 proxy->pci_dev.config_write = virtio_write_config;
1684 proxy->pci_dev.config_read = virtio_read_config;
1685
1686 if (legacy) {
1687 size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev)
1688 + virtio_bus_get_vdev_config_len(bus);
1689 size = pow2ceil(size);
1690
1691 memory_region_init_io(&proxy->bar, OBJECT(proxy),
1692 &virtio_pci_config_ops,
1693 proxy, "virtio-pci", size);
1694
1695 pci_register_bar(&proxy->pci_dev, proxy->legacy_io_bar_idx,
1696 PCI_BASE_ADDRESS_SPACE_IO, &proxy->bar);
1697 }
1698 }
1699
1700 static void virtio_pci_device_unplugged(DeviceState *d)
1701 {
1702 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1703 bool modern = virtio_pci_modern(proxy);
1704 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
1705
1706 virtio_pci_stop_ioeventfd(proxy);
1707
1708 if (modern) {
1709 virtio_pci_modern_mem_region_unmap(proxy, &proxy->common);
1710 virtio_pci_modern_mem_region_unmap(proxy, &proxy->isr);
1711 virtio_pci_modern_mem_region_unmap(proxy, &proxy->device);
1712 virtio_pci_modern_mem_region_unmap(proxy, &proxy->notify);
1713 if (modern_pio) {
1714 virtio_pci_modern_io_region_unmap(proxy, &proxy->notify_pio);
1715 }
1716 }
1717 }
1718
1719 static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
1720 {
1721 VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
1722 VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev);
1723 bool pcie_port = pci_bus_is_express(pci_dev->bus) &&
1724 !pci_bus_is_root(pci_dev->bus);
1725
1726 if (!kvm_has_many_ioeventfds()) {
1727 proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
1728 }
1729
1730 /*
1731 * virtio pci bar layout used by default.
1732 * subclasses can re-arrange things if needed.
1733 *
1734 * region 0 -- virtio legacy io bar
1735 * region 1 -- msi-x bar
1736 * region 4+5 -- virtio modern memory (64bit) bar
1737 *
1738 */
1739 proxy->legacy_io_bar_idx = 0;
1740 proxy->msix_bar_idx = 1;
1741 proxy->modern_io_bar_idx = 2;
1742 proxy->modern_mem_bar_idx = 4;
1743
1744 proxy->common.offset = 0x0;
1745 proxy->common.size = 0x1000;
1746 proxy->common.type = VIRTIO_PCI_CAP_COMMON_CFG;
1747
1748 proxy->isr.offset = 0x1000;
1749 proxy->isr.size = 0x1000;
1750 proxy->isr.type = VIRTIO_PCI_CAP_ISR_CFG;
1751
1752 proxy->device.offset = 0x2000;
1753 proxy->device.size = 0x1000;
1754 proxy->device.type = VIRTIO_PCI_CAP_DEVICE_CFG;
1755
1756 proxy->notify.offset = 0x3000;
1757 proxy->notify.size = virtio_pci_queue_mem_mult(proxy) * VIRTIO_QUEUE_MAX;
1758 proxy->notify.type = VIRTIO_PCI_CAP_NOTIFY_CFG;
1759
1760 proxy->notify_pio.offset = 0x0;
1761 proxy->notify_pio.size = 0x4;
1762 proxy->notify_pio.type = VIRTIO_PCI_CAP_NOTIFY_CFG;
1763
1764 /* subclasses can enforce modern, so do this unconditionally */
1765 memory_region_init(&proxy->modern_bar, OBJECT(proxy), "virtio-pci",
1766 /* PCI BAR regions must be powers of 2 */
1767 pow2ceil(proxy->notify.offset + proxy->notify.size));
1768
1769 memory_region_init_alias(&proxy->modern_cfg,
1770 OBJECT(proxy),
1771 "virtio-pci-cfg",
1772 &proxy->modern_bar,
1773 0,
1774 memory_region_size(&proxy->modern_bar));
1775
1776 address_space_init(&proxy->modern_as, &proxy->modern_cfg, "virtio-pci-cfg-as");
1777
1778 if (proxy->disable_legacy == ON_OFF_AUTO_AUTO) {
1779 proxy->disable_legacy = pcie_port ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF;
1780 }
1781
1782 if (!virtio_pci_modern(proxy) && !virtio_pci_legacy(proxy)) {
1783 error_setg(errp, "device cannot work as neither modern nor legacy mode"
1784 " is enabled");
1785 error_append_hint(errp, "Set either disable-modern or disable-legacy"
1786 " to off\n");
1787 return;
1788 }
1789
1790 if (pcie_port && pci_is_express(pci_dev)) {
1791 int pos;
1792
1793 pos = pcie_endpoint_cap_init(pci_dev, 0);
1794 assert(pos > 0);
1795
1796 pos = pci_add_capability(pci_dev, PCI_CAP_ID_PM, 0, PCI_PM_SIZEOF);
1797 assert(pos > 0);
1798
1799 /*
1800 * Indicates that this function complies with revision 1.2 of the
1801 * PCI Power Management Interface Specification.
1802 */
1803 pci_set_word(pci_dev->config + pos + PCI_PM_PMC, 0x3);
1804 } else {
1805 /*
1806 * make future invocations of pci_is_express() return false
1807 * and pci_config_size() return PCI_CONFIG_SPACE_SIZE.
1808 */
1809 pci_dev->cap_present &= ~QEMU_PCI_CAP_EXPRESS;
1810 }
1811
1812 virtio_pci_bus_new(&proxy->bus, sizeof(proxy->bus), proxy);
1813 if (k->realize) {
1814 k->realize(proxy, errp);
1815 }
1816 }
1817
1818 static void virtio_pci_exit(PCIDevice *pci_dev)
1819 {
1820 VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
1821
1822 msix_uninit_exclusive_bar(pci_dev);
1823 address_space_destroy(&proxy->modern_as);
1824 }
1825
1826 static void virtio_pci_reset(DeviceState *qdev)
1827 {
1828 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
1829 VirtioBusState *bus = VIRTIO_BUS(&proxy->bus);
1830 int i;
1831
1832 virtio_pci_stop_ioeventfd(proxy);
1833 virtio_bus_reset(bus);
1834 msix_unuse_all_vectors(&proxy->pci_dev);
1835
1836 for (i = 0; i < VIRTIO_QUEUE_MAX; i++) {
1837 proxy->vqs[i].enabled = 0;
1838 }
1839 }
1840
1841 static Property virtio_pci_properties[] = {
1842 DEFINE_PROP_BIT("virtio-pci-bus-master-bug-migration", VirtIOPCIProxy, flags,
1843 VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT, false),
1844 DEFINE_PROP_ON_OFF_AUTO("disable-legacy", VirtIOPCIProxy, disable_legacy,
1845 ON_OFF_AUTO_AUTO),
1846 DEFINE_PROP_BOOL("disable-modern", VirtIOPCIProxy, disable_modern, false),
1847 DEFINE_PROP_BIT("migrate-extra", VirtIOPCIProxy, flags,
1848 VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT, true),
1849 DEFINE_PROP_BIT("modern-pio-notify", VirtIOPCIProxy, flags,
1850 VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT, false),
1851 DEFINE_PROP_BIT("x-disable-pcie", VirtIOPCIProxy, flags,
1852 VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT, false),
1853 DEFINE_PROP_BIT("page-per-vq", VirtIOPCIProxy, flags,
1854 VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT, false),
1855 DEFINE_PROP_END_OF_LIST(),
1856 };
1857
1858 static void virtio_pci_dc_realize(DeviceState *qdev, Error **errp)
1859 {
1860 VirtioPCIClass *vpciklass = VIRTIO_PCI_GET_CLASS(qdev);
1861 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
1862 PCIDevice *pci_dev = &proxy->pci_dev;
1863
1864 if (!(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_PCIE) &&
1865 virtio_pci_modern(proxy)) {
1866 pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
1867 }
1868
1869 vpciklass->parent_dc_realize(qdev, errp);
1870 }
1871
1872 static void virtio_pci_class_init(ObjectClass *klass, void *data)
1873 {
1874 DeviceClass *dc = DEVICE_CLASS(klass);
1875 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1876 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
1877
1878 dc->props = virtio_pci_properties;
1879 k->realize = virtio_pci_realize;
1880 k->exit = virtio_pci_exit;
1881 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1882 k->revision = VIRTIO_PCI_ABI_VERSION;
1883 k->class_id = PCI_CLASS_OTHERS;
1884 vpciklass->parent_dc_realize = dc->realize;
1885 dc->realize = virtio_pci_dc_realize;
1886 dc->reset = virtio_pci_reset;
1887 }
1888
1889 static const TypeInfo virtio_pci_info = {
1890 .name = TYPE_VIRTIO_PCI,
1891 .parent = TYPE_PCI_DEVICE,
1892 .instance_size = sizeof(VirtIOPCIProxy),
1893 .class_init = virtio_pci_class_init,
1894 .class_size = sizeof(VirtioPCIClass),
1895 .abstract = true,
1896 };
1897
1898 /* virtio-blk-pci */
1899
1900 static Property virtio_blk_pci_properties[] = {
1901 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
1902 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1903 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1904 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
1905 DEFINE_PROP_END_OF_LIST(),
1906 };
1907
1908 static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
1909 {
1910 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
1911 DeviceState *vdev = DEVICE(&dev->vdev);
1912
1913 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1914 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
1915 }
1916
1917 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
1918 {
1919 DeviceClass *dc = DEVICE_CLASS(klass);
1920 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1921 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1922
1923 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1924 dc->props = virtio_blk_pci_properties;
1925 k->realize = virtio_blk_pci_realize;
1926 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1927 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
1928 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1929 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
1930 }
1931
1932 static void virtio_blk_pci_instance_init(Object *obj)
1933 {
1934 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
1935
1936 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
1937 TYPE_VIRTIO_BLK);
1938 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread",
1939 &error_abort);
1940 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
1941 "bootindex", &error_abort);
1942 }
1943
1944 static const TypeInfo virtio_blk_pci_info = {
1945 .name = TYPE_VIRTIO_BLK_PCI,
1946 .parent = TYPE_VIRTIO_PCI,
1947 .instance_size = sizeof(VirtIOBlkPCI),
1948 .instance_init = virtio_blk_pci_instance_init,
1949 .class_init = virtio_blk_pci_class_init,
1950 };
1951
1952 /* virtio-scsi-pci */
1953
1954 static Property virtio_scsi_pci_properties[] = {
1955 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1956 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1957 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
1958 DEV_NVECTORS_UNSPECIFIED),
1959 DEFINE_PROP_END_OF_LIST(),
1960 };
1961
1962 static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
1963 {
1964 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev);
1965 DeviceState *vdev = DEVICE(&dev->vdev);
1966 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
1967 DeviceState *proxy = DEVICE(vpci_dev);
1968 char *bus_name;
1969
1970 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
1971 vpci_dev->nvectors = vs->conf.num_queues + 3;
1972 }
1973
1974 /*
1975 * For command line compatibility, this sets the virtio-scsi-device bus
1976 * name as before.
1977 */
1978 if (proxy->id) {
1979 bus_name = g_strdup_printf("%s.0", proxy->id);
1980 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
1981 g_free(bus_name);
1982 }
1983
1984 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1985 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
1986 }
1987
1988 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data)
1989 {
1990 DeviceClass *dc = DEVICE_CLASS(klass);
1991 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1992 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1993
1994 k->realize = virtio_scsi_pci_realize;
1995 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1996 dc->props = virtio_scsi_pci_properties;
1997 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1998 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
1999 pcidev_k->revision = 0x00;
2000 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
2001 }
2002
2003 static void virtio_scsi_pci_instance_init(Object *obj)
2004 {
2005 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
2006
2007 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2008 TYPE_VIRTIO_SCSI);
2009 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev), "iothread",
2010 &error_abort);
2011 }
2012
2013 static const TypeInfo virtio_scsi_pci_info = {
2014 .name = TYPE_VIRTIO_SCSI_PCI,
2015 .parent = TYPE_VIRTIO_PCI,
2016 .instance_size = sizeof(VirtIOSCSIPCI),
2017 .instance_init = virtio_scsi_pci_instance_init,
2018 .class_init = virtio_scsi_pci_class_init,
2019 };
2020
2021 /* vhost-scsi-pci */
2022
2023 #ifdef CONFIG_VHOST_SCSI
2024 static Property vhost_scsi_pci_properties[] = {
2025 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
2026 DEV_NVECTORS_UNSPECIFIED),
2027 DEFINE_PROP_END_OF_LIST(),
2028 };
2029
2030 static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2031 {
2032 VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev);
2033 DeviceState *vdev = DEVICE(&dev->vdev);
2034 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
2035
2036 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2037 vpci_dev->nvectors = vs->conf.num_queues + 3;
2038 }
2039
2040 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2041 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2042 }
2043
2044 static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data)
2045 {
2046 DeviceClass *dc = DEVICE_CLASS(klass);
2047 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2048 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2049 k->realize = vhost_scsi_pci_realize;
2050 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2051 dc->props = vhost_scsi_pci_properties;
2052 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2053 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
2054 pcidev_k->revision = 0x00;
2055 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
2056 }
2057
2058 static void vhost_scsi_pci_instance_init(Object *obj)
2059 {
2060 VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj);
2061
2062 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2063 TYPE_VHOST_SCSI);
2064 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
2065 "bootindex", &error_abort);
2066 }
2067
2068 static const TypeInfo vhost_scsi_pci_info = {
2069 .name = TYPE_VHOST_SCSI_PCI,
2070 .parent = TYPE_VIRTIO_PCI,
2071 .instance_size = sizeof(VHostSCSIPCI),
2072 .instance_init = vhost_scsi_pci_instance_init,
2073 .class_init = vhost_scsi_pci_class_init,
2074 };
2075 #endif
2076
2077 /* vhost-vsock-pci */
2078
2079 #ifdef CONFIG_VHOST_VSOCK
2080 static Property vhost_vsock_pci_properties[] = {
2081 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
2082 DEFINE_PROP_END_OF_LIST(),
2083 };
2084
2085 static void vhost_vsock_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2086 {
2087 VHostVSockPCI *dev = VHOST_VSOCK_PCI(vpci_dev);
2088 DeviceState *vdev = DEVICE(&dev->vdev);
2089
2090 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2091 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2092 }
2093
2094 static void vhost_vsock_pci_class_init(ObjectClass *klass, void *data)
2095 {
2096 DeviceClass *dc = DEVICE_CLASS(klass);
2097 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2098 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2099 k->realize = vhost_vsock_pci_realize;
2100 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
2101 dc->props = vhost_vsock_pci_properties;
2102 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2103 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_VSOCK;
2104 pcidev_k->revision = 0x00;
2105 pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
2106 }
2107
2108 static void vhost_vsock_pci_instance_init(Object *obj)
2109 {
2110 VHostVSockPCI *dev = VHOST_VSOCK_PCI(obj);
2111
2112 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2113 TYPE_VHOST_VSOCK);
2114 }
2115
2116 static const TypeInfo vhost_vsock_pci_info = {
2117 .name = TYPE_VHOST_VSOCK_PCI,
2118 .parent = TYPE_VIRTIO_PCI,
2119 .instance_size = sizeof(VHostVSockPCI),
2120 .instance_init = vhost_vsock_pci_instance_init,
2121 .class_init = vhost_vsock_pci_class_init,
2122 };
2123 #endif
2124
2125 /* virtio-balloon-pci */
2126
2127 static Property virtio_balloon_pci_properties[] = {
2128 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
2129 DEFINE_PROP_END_OF_LIST(),
2130 };
2131
2132 static void virtio_balloon_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2133 {
2134 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev);
2135 DeviceState *vdev = DEVICE(&dev->vdev);
2136
2137 if (vpci_dev->class_code != PCI_CLASS_OTHERS &&
2138 vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */
2139 vpci_dev->class_code = PCI_CLASS_OTHERS;
2140 }
2141
2142 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2143 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2144 }
2145
2146 static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data)
2147 {
2148 DeviceClass *dc = DEVICE_CLASS(klass);
2149 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2150 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2151 k->realize = virtio_balloon_pci_realize;
2152 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
2153 dc->props = virtio_balloon_pci_properties;
2154 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2155 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON;
2156 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
2157 pcidev_k->class_id = PCI_CLASS_OTHERS;
2158 }
2159
2160 static void virtio_balloon_pci_instance_init(Object *obj)
2161 {
2162 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj);
2163
2164 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2165 TYPE_VIRTIO_BALLOON);
2166 object_property_add_alias(obj, "guest-stats", OBJECT(&dev->vdev),
2167 "guest-stats", &error_abort);
2168 object_property_add_alias(obj, "guest-stats-polling-interval",
2169 OBJECT(&dev->vdev),
2170 "guest-stats-polling-interval", &error_abort);
2171 }
2172
2173 static const TypeInfo virtio_balloon_pci_info = {
2174 .name = TYPE_VIRTIO_BALLOON_PCI,
2175 .parent = TYPE_VIRTIO_PCI,
2176 .instance_size = sizeof(VirtIOBalloonPCI),
2177 .instance_init = virtio_balloon_pci_instance_init,
2178 .class_init = virtio_balloon_pci_class_init,
2179 };
2180
2181 /* virtio-serial-pci */
2182
2183 static void virtio_serial_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2184 {
2185 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev);
2186 DeviceState *vdev = DEVICE(&dev->vdev);
2187 DeviceState *proxy = DEVICE(vpci_dev);
2188 char *bus_name;
2189
2190 if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
2191 vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
2192 vpci_dev->class_code != PCI_CLASS_OTHERS) { /* qemu-kvm */
2193 vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER;
2194 }
2195
2196 /* backwards-compatibility with machines that were created with
2197 DEV_NVECTORS_UNSPECIFIED */
2198 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
2199 vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1;
2200 }
2201
2202 /*
2203 * For command line compatibility, this sets the virtio-serial-device bus
2204 * name as before.
2205 */
2206 if (proxy->id) {
2207 bus_name = g_strdup_printf("%s.0", proxy->id);
2208 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
2209 g_free(bus_name);
2210 }
2211
2212 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2213 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2214 }
2215
2216 static Property virtio_serial_pci_properties[] = {
2217 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
2218 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
2219 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
2220 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
2221 DEFINE_PROP_END_OF_LIST(),
2222 };
2223
2224 static void virtio_serial_pci_class_init(ObjectClass *klass, void *data)
2225 {
2226 DeviceClass *dc = DEVICE_CLASS(klass);
2227 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2228 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2229 k->realize = virtio_serial_pci_realize;
2230 set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
2231 dc->props = virtio_serial_pci_properties;
2232 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2233 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE;
2234 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
2235 pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
2236 }
2237
2238 static void virtio_serial_pci_instance_init(Object *obj)
2239 {
2240 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj);
2241
2242 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2243 TYPE_VIRTIO_SERIAL);
2244 }
2245
2246 static const TypeInfo virtio_serial_pci_info = {
2247 .name = TYPE_VIRTIO_SERIAL_PCI,
2248 .parent = TYPE_VIRTIO_PCI,
2249 .instance_size = sizeof(VirtIOSerialPCI),
2250 .instance_init = virtio_serial_pci_instance_init,
2251 .class_init = virtio_serial_pci_class_init,
2252 };
2253
2254 /* virtio-net-pci */
2255
2256 static Property virtio_net_properties[] = {
2257 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
2258 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false),
2259 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
2260 DEFINE_PROP_END_OF_LIST(),
2261 };
2262
2263 static void virtio_net_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2264 {
2265 DeviceState *qdev = DEVICE(vpci_dev);
2266 VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev);
2267 DeviceState *vdev = DEVICE(&dev->vdev);
2268
2269 virtio_net_set_netclient_name(&dev->vdev, qdev->id,
2270 object_get_typename(OBJECT(qdev)));
2271 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2272 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2273 }
2274
2275 static void virtio_net_pci_class_init(ObjectClass *klass, void *data)
2276 {
2277 DeviceClass *dc = DEVICE_CLASS(klass);
2278 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
2279 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
2280
2281 k->romfile = "efi-virtio.rom";
2282 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2283 k->device_id = PCI_DEVICE_ID_VIRTIO_NET;
2284 k->revision = VIRTIO_PCI_ABI_VERSION;
2285 k->class_id = PCI_CLASS_NETWORK_ETHERNET;
2286 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
2287 dc->props = virtio_net_properties;
2288 vpciklass->realize = virtio_net_pci_realize;
2289 }
2290
2291 static void virtio_net_pci_instance_init(Object *obj)
2292 {
2293 VirtIONetPCI *dev = VIRTIO_NET_PCI(obj);
2294
2295 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2296 TYPE_VIRTIO_NET);
2297 object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
2298 "bootindex", &error_abort);
2299 }
2300
2301 static const TypeInfo virtio_net_pci_info = {
2302 .name = TYPE_VIRTIO_NET_PCI,
2303 .parent = TYPE_VIRTIO_PCI,
2304 .instance_size = sizeof(VirtIONetPCI),
2305 .instance_init = virtio_net_pci_instance_init,
2306 .class_init = virtio_net_pci_class_init,
2307 };
2308
2309 /* virtio-rng-pci */
2310
2311 static void virtio_rng_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2312 {
2313 VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev);
2314 DeviceState *vdev = DEVICE(&vrng->vdev);
2315 Error *err = NULL;
2316
2317 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2318 object_property_set_bool(OBJECT(vdev), true, "realized", &err);
2319 if (err) {
2320 error_propagate(errp, err);
2321 return;
2322 }
2323
2324 object_property_set_link(OBJECT(vrng),
2325 OBJECT(vrng->vdev.conf.rng), "rng",
2326 NULL);
2327 }
2328
2329 static void virtio_rng_pci_class_init(ObjectClass *klass, void *data)
2330 {
2331 DeviceClass *dc = DEVICE_CLASS(klass);
2332 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2333 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2334
2335 k->realize = virtio_rng_pci_realize;
2336 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
2337
2338 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
2339 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG;
2340 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
2341 pcidev_k->class_id = PCI_CLASS_OTHERS;
2342 }
2343
2344 static void virtio_rng_initfn(Object *obj)
2345 {
2346 VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj);
2347
2348 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2349 TYPE_VIRTIO_RNG);
2350 object_property_add_alias(obj, "rng", OBJECT(&dev->vdev), "rng",
2351 &error_abort);
2352 }
2353
2354 static const TypeInfo virtio_rng_pci_info = {
2355 .name = TYPE_VIRTIO_RNG_PCI,
2356 .parent = TYPE_VIRTIO_PCI,
2357 .instance_size = sizeof(VirtIORngPCI),
2358 .instance_init = virtio_rng_initfn,
2359 .class_init = virtio_rng_pci_class_init,
2360 };
2361
2362 /* virtio-input-pci */
2363
2364 static Property virtio_input_pci_properties[] = {
2365 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
2366 DEFINE_PROP_END_OF_LIST(),
2367 };
2368
2369 static void virtio_input_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
2370 {
2371 VirtIOInputPCI *vinput = VIRTIO_INPUT_PCI(vpci_dev);
2372 DeviceState *vdev = DEVICE(&vinput->vdev);
2373
2374 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
2375 virtio_pci_force_virtio_1(vpci_dev);
2376 object_property_set_bool(OBJECT(vdev), true, "realized", errp);
2377 }
2378
2379 static void virtio_input_pci_class_init(ObjectClass *klass, void *data)
2380 {
2381 DeviceClass *dc = DEVICE_CLASS(klass);
2382 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
2383 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2384
2385 dc->props = virtio_input_pci_properties;
2386 k->realize = virtio_input_pci_realize;
2387 set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
2388
2389 pcidev_k->class_id = PCI_CLASS_INPUT_OTHER;
2390 }
2391
2392 static void virtio_input_hid_kbd_pci_class_init(ObjectClass *klass, void *data)
2393 {
2394 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2395
2396 pcidev_k->class_id = PCI_CLASS_INPUT_KEYBOARD;
2397 }
2398
2399 static void virtio_input_hid_mouse_pci_class_init(ObjectClass *klass,
2400 void *data)
2401 {
2402 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
2403
2404 pcidev_k->class_id = PCI_CLASS_INPUT_MOUSE;
2405 }
2406
2407 static void virtio_keyboard_initfn(Object *obj)
2408 {
2409 VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj);
2410
2411 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2412 TYPE_VIRTIO_KEYBOARD);
2413 }
2414
2415 static void virtio_mouse_initfn(Object *obj)
2416 {
2417 VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj);
2418
2419 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2420 TYPE_VIRTIO_MOUSE);
2421 }
2422
2423 static void virtio_tablet_initfn(Object *obj)
2424 {
2425 VirtIOInputHIDPCI *dev = VIRTIO_INPUT_HID_PCI(obj);
2426
2427 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2428 TYPE_VIRTIO_TABLET);
2429 }
2430
2431 static const TypeInfo virtio_input_pci_info = {
2432 .name = TYPE_VIRTIO_INPUT_PCI,
2433 .parent = TYPE_VIRTIO_PCI,
2434 .instance_size = sizeof(VirtIOInputPCI),
2435 .class_init = virtio_input_pci_class_init,
2436 .abstract = true,
2437 };
2438
2439 static const TypeInfo virtio_input_hid_pci_info = {
2440 .name = TYPE_VIRTIO_INPUT_HID_PCI,
2441 .parent = TYPE_VIRTIO_INPUT_PCI,
2442 .instance_size = sizeof(VirtIOInputHIDPCI),
2443 .abstract = true,
2444 };
2445
2446 static const TypeInfo virtio_keyboard_pci_info = {
2447 .name = TYPE_VIRTIO_KEYBOARD_PCI,
2448 .parent = TYPE_VIRTIO_INPUT_HID_PCI,
2449 .class_init = virtio_input_hid_kbd_pci_class_init,
2450 .instance_size = sizeof(VirtIOInputHIDPCI),
2451 .instance_init = virtio_keyboard_initfn,
2452 };
2453
2454 static const TypeInfo virtio_mouse_pci_info = {
2455 .name = TYPE_VIRTIO_MOUSE_PCI,
2456 .parent = TYPE_VIRTIO_INPUT_HID_PCI,
2457 .class_init = virtio_input_hid_mouse_pci_class_init,
2458 .instance_size = sizeof(VirtIOInputHIDPCI),
2459 .instance_init = virtio_mouse_initfn,
2460 };
2461
2462 static const TypeInfo virtio_tablet_pci_info = {
2463 .name = TYPE_VIRTIO_TABLET_PCI,
2464 .parent = TYPE_VIRTIO_INPUT_HID_PCI,
2465 .instance_size = sizeof(VirtIOInputHIDPCI),
2466 .instance_init = virtio_tablet_initfn,
2467 };
2468
2469 #ifdef CONFIG_LINUX
2470 static void virtio_host_initfn(Object *obj)
2471 {
2472 VirtIOInputHostPCI *dev = VIRTIO_INPUT_HOST_PCI(obj);
2473
2474 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
2475 TYPE_VIRTIO_INPUT_HOST);
2476 }
2477
2478 static const TypeInfo virtio_host_pci_info = {
2479 .name = TYPE_VIRTIO_INPUT_HOST_PCI,
2480 .parent = TYPE_VIRTIO_INPUT_PCI,
2481 .instance_size = sizeof(VirtIOInputHostPCI),
2482 .instance_init = virtio_host_initfn,
2483 };
2484 #endif
2485
2486 /* virtio-pci-bus */
2487
2488 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
2489 VirtIOPCIProxy *dev)
2490 {
2491 DeviceState *qdev = DEVICE(dev);
2492 char virtio_bus_name[] = "virtio-bus";
2493
2494 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_PCI_BUS, qdev,
2495 virtio_bus_name);
2496 }
2497
2498 static void virtio_pci_bus_class_init(ObjectClass *klass, void *data)
2499 {
2500 BusClass *bus_class = BUS_CLASS(klass);
2501 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
2502 bus_class->max_dev = 1;
2503 k->notify = virtio_pci_notify;
2504 k->save_config = virtio_pci_save_config;
2505 k->load_config = virtio_pci_load_config;
2506 k->save_queue = virtio_pci_save_queue;
2507 k->load_queue = virtio_pci_load_queue;
2508 k->save_extra_state = virtio_pci_save_extra_state;
2509 k->load_extra_state = virtio_pci_load_extra_state;
2510 k->has_extra_state = virtio_pci_has_extra_state;
2511 k->query_guest_notifiers = virtio_pci_query_guest_notifiers;
2512 k->set_guest_notifiers = virtio_pci_set_guest_notifiers;
2513 k->vmstate_change = virtio_pci_vmstate_change;
2514 k->pre_plugged = virtio_pci_pre_plugged;
2515 k->device_plugged = virtio_pci_device_plugged;
2516 k->device_unplugged = virtio_pci_device_unplugged;
2517 k->query_nvectors = virtio_pci_query_nvectors;
2518 k->ioeventfd_enabled = virtio_pci_ioeventfd_enabled;
2519 k->ioeventfd_assign = virtio_pci_ioeventfd_assign;
2520 }
2521
2522 static const TypeInfo virtio_pci_bus_info = {
2523 .name = TYPE_VIRTIO_PCI_BUS,
2524 .parent = TYPE_VIRTIO_BUS,
2525 .instance_size = sizeof(VirtioPCIBusState),
2526 .class_init = virtio_pci_bus_class_init,
2527 };
2528
2529 static void virtio_pci_register_types(void)
2530 {
2531 type_register_static(&virtio_rng_pci_info);
2532 type_register_static(&virtio_input_pci_info);
2533 type_register_static(&virtio_input_hid_pci_info);
2534 type_register_static(&virtio_keyboard_pci_info);
2535 type_register_static(&virtio_mouse_pci_info);
2536 type_register_static(&virtio_tablet_pci_info);
2537 #ifdef CONFIG_LINUX
2538 type_register_static(&virtio_host_pci_info);
2539 #endif
2540 type_register_static(&virtio_pci_bus_info);
2541 type_register_static(&virtio_pci_info);
2542 #ifdef CONFIG_VIRTFS
2543 type_register_static(&virtio_9p_pci_info);
2544 #endif
2545 type_register_static(&virtio_blk_pci_info);
2546 type_register_static(&virtio_scsi_pci_info);
2547 type_register_static(&virtio_balloon_pci_info);
2548 type_register_static(&virtio_serial_pci_info);
2549 type_register_static(&virtio_net_pci_info);
2550 #ifdef CONFIG_VHOST_SCSI
2551 type_register_static(&vhost_scsi_pci_info);
2552 #endif
2553 #ifdef CONFIG_VHOST_VSOCK
2554 type_register_static(&vhost_vsock_pci_info);
2555 #endif
2556 }
2557
2558 type_init(virtio_pci_register_types)
QEmu