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18#include "qemu/osdep.h"
19
20#include "exec/memop.h"
21#include "standard-headers/linux/virtio_pci.h"
22#include "hw/virtio/virtio.h"
23#include "migration/qemu-file-types.h"
24#include "hw/pci/pci.h"
25#include "hw/pci/pci_bus.h"
26#include "hw/qdev-properties.h"
27#include "qapi/error.h"
28#include "qemu/error-report.h"
29#include "qemu/module.h"
30#include "hw/pci/msi.h"
31#include "hw/pci/msix.h"
32#include "hw/loader.h"
33#include "sysemu/kvm.h"
34#include "virtio-pci.h"
35#include "qemu/range.h"
36#include "hw/virtio/virtio-bus.h"
37#include "qapi/visitor.h"
38
39#define VIRTIO_PCI_REGION_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_present(dev))
40
41#undef VIRTIO_PCI_CONFIG
42
43
44
45#define VIRTIO_PCI_CONFIG_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_enabled(dev))
46
47static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
48 VirtIOPCIProxy *dev);
49static void virtio_pci_reset(DeviceState *qdev);
50
51
52
53static inline VirtIOPCIProxy *to_virtio_pci_proxy(DeviceState *d)
54{
55 return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
56}
57
58
59
60
61static inline VirtIOPCIProxy *to_virtio_pci_proxy_fast(DeviceState *d)
62{
63 return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
64}
65
66static void virtio_pci_notify(DeviceState *d, uint16_t vector)
67{
68 VirtIOPCIProxy *proxy = to_virtio_pci_proxy_fast(d);
69
70 if (msix_enabled(&proxy->pci_dev))
71 msix_notify(&proxy->pci_dev, vector);
72 else {
73 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
74 pci_set_irq(&proxy->pci_dev, atomic_read(&vdev->isr) & 1);
75 }
76}
77
78static void virtio_pci_save_config(DeviceState *d, QEMUFile *f)
79{
80 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
81 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
82
83 pci_device_save(&proxy->pci_dev, f);
84 msix_save(&proxy->pci_dev, f);
85 if (msix_present(&proxy->pci_dev))
86 qemu_put_be16(f, vdev->config_vector);
87}
88
89static const VMStateDescription vmstate_virtio_pci_modern_queue_state = {
90 .name = "virtio_pci/modern_queue_state",
91 .version_id = 1,
92 .minimum_version_id = 1,
93 .fields = (VMStateField[]) {
94 VMSTATE_UINT16(num, VirtIOPCIQueue),
95 VMSTATE_UNUSED(1),
96 VMSTATE_BOOL(enabled, VirtIOPCIQueue),
97 VMSTATE_UINT32_ARRAY(desc, VirtIOPCIQueue, 2),
98 VMSTATE_UINT32_ARRAY(avail, VirtIOPCIQueue, 2),
99 VMSTATE_UINT32_ARRAY(used, VirtIOPCIQueue, 2),
100 VMSTATE_END_OF_LIST()
101 }
102};
103
104static bool virtio_pci_modern_state_needed(void *opaque)
105{
106 VirtIOPCIProxy *proxy = opaque;
107
108 return virtio_pci_modern(proxy);
109}
110
111static const VMStateDescription vmstate_virtio_pci_modern_state_sub = {
112 .name = "virtio_pci/modern_state",
113 .version_id = 1,
114 .minimum_version_id = 1,
115 .needed = &virtio_pci_modern_state_needed,
116 .fields = (VMStateField[]) {
117 VMSTATE_UINT32(dfselect, VirtIOPCIProxy),
118 VMSTATE_UINT32(gfselect, VirtIOPCIProxy),
119 VMSTATE_UINT32_ARRAY(guest_features, VirtIOPCIProxy, 2),
120 VMSTATE_STRUCT_ARRAY(vqs, VirtIOPCIProxy, VIRTIO_QUEUE_MAX, 0,
121 vmstate_virtio_pci_modern_queue_state,
122 VirtIOPCIQueue),
123 VMSTATE_END_OF_LIST()
124 }
125};
126
127static const VMStateDescription vmstate_virtio_pci = {
128 .name = "virtio_pci",
129 .version_id = 1,
130 .minimum_version_id = 1,
131 .minimum_version_id_old = 1,
132 .fields = (VMStateField[]) {
133 VMSTATE_END_OF_LIST()
134 },
135 .subsections = (const VMStateDescription*[]) {
136 &vmstate_virtio_pci_modern_state_sub,
137 NULL
138 }
139};
140
141static bool virtio_pci_has_extra_state(DeviceState *d)
142{
143 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
144
145 return proxy->flags & VIRTIO_PCI_FLAG_MIGRATE_EXTRA;
146}
147
148static void virtio_pci_save_extra_state(DeviceState *d, QEMUFile *f)
149{
150 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
151
152 vmstate_save_state(f, &vmstate_virtio_pci, proxy, NULL);
153}
154
155static int virtio_pci_load_extra_state(DeviceState *d, QEMUFile *f)
156{
157 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
158
159 return vmstate_load_state(f, &vmstate_virtio_pci, proxy, 1);
160}
161
162static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f)
163{
164 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
165 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
166
167 if (msix_present(&proxy->pci_dev))
168 qemu_put_be16(f, virtio_queue_vector(vdev, n));
169}
170
171static int virtio_pci_load_config(DeviceState *d, QEMUFile *f)
172{
173 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
174 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
175
176 int ret;
177 ret = pci_device_load(&proxy->pci_dev, f);
178 if (ret) {
179 return ret;
180 }
181 msix_unuse_all_vectors(&proxy->pci_dev);
182 msix_load(&proxy->pci_dev, f);
183 if (msix_present(&proxy->pci_dev)) {
184 qemu_get_be16s(f, &vdev->config_vector);
185 } else {
186 vdev->config_vector = VIRTIO_NO_VECTOR;
187 }
188 if (vdev->config_vector != VIRTIO_NO_VECTOR) {
189 return msix_vector_use(&proxy->pci_dev, vdev->config_vector);
190 }
191 return 0;
192}
193
194static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f)
195{
196 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
197 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
198
199 uint16_t vector;
200 if (msix_present(&proxy->pci_dev)) {
201 qemu_get_be16s(f, &vector);
202 } else {
203 vector = VIRTIO_NO_VECTOR;
204 }
205 virtio_queue_set_vector(vdev, n, vector);
206 if (vector != VIRTIO_NO_VECTOR) {
207 return msix_vector_use(&proxy->pci_dev, vector);
208 }
209
210 return 0;
211}
212
213static bool virtio_pci_ioeventfd_enabled(DeviceState *d)
214{
215 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
216
217 return (proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) != 0;
218}
219
220#define QEMU_VIRTIO_PCI_QUEUE_MEM_MULT 0x1000
221
222static inline int virtio_pci_queue_mem_mult(struct VirtIOPCIProxy *proxy)
223{
224 return (proxy->flags & VIRTIO_PCI_FLAG_PAGE_PER_VQ) ?
225 QEMU_VIRTIO_PCI_QUEUE_MEM_MULT : 4;
226}
227
228static int virtio_pci_ioeventfd_assign(DeviceState *d, EventNotifier *notifier,
229 int n, bool assign)
230{
231 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
232 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
233 VirtQueue *vq = virtio_get_queue(vdev, n);
234 bool legacy = virtio_pci_legacy(proxy);
235 bool modern = virtio_pci_modern(proxy);
236 bool fast_mmio = kvm_ioeventfd_any_length_enabled();
237 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
238 MemoryRegion *modern_mr = &proxy->notify.mr;
239 MemoryRegion *modern_notify_mr = &proxy->notify_pio.mr;
240 MemoryRegion *legacy_mr = &proxy->bar;
241 hwaddr modern_addr = virtio_pci_queue_mem_mult(proxy) *
242 virtio_get_queue_index(vq);
243 hwaddr legacy_addr = VIRTIO_PCI_QUEUE_NOTIFY;
244
245 if (assign) {
246 if (modern) {
247 if (fast_mmio) {
248 memory_region_add_eventfd(modern_mr, modern_addr, 0,
249 false, n, notifier);
250 } else {
251 memory_region_add_eventfd(modern_mr, modern_addr, 2,
252 false, n, notifier);
253 }
254 if (modern_pio) {
255 memory_region_add_eventfd(modern_notify_mr, 0, 2,
256 true, n, notifier);
257 }
258 }
259 if (legacy) {
260 memory_region_add_eventfd(legacy_mr, legacy_addr, 2,
261 true, n, notifier);
262 }
263 } else {
264 if (modern) {
265 if (fast_mmio) {
266 memory_region_del_eventfd(modern_mr, modern_addr, 0,
267 false, n, notifier);
268 } else {
269 memory_region_del_eventfd(modern_mr, modern_addr, 2,
270 false, n, notifier);
271 }
272 if (modern_pio) {
273 memory_region_del_eventfd(modern_notify_mr, 0, 2,
274 true, n, notifier);
275 }
276 }
277 if (legacy) {
278 memory_region_del_eventfd(legacy_mr, legacy_addr, 2,
279 true, n, notifier);
280 }
281 }
282 return 0;
283}
284
285static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy)
286{
287 virtio_bus_start_ioeventfd(&proxy->bus);
288}
289
290static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy)
291{
292 virtio_bus_stop_ioeventfd(&proxy->bus);
293}
294
295static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
296{
297 VirtIOPCIProxy *proxy = opaque;
298 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
299 hwaddr pa;
300
301 switch (addr) {
302 case VIRTIO_PCI_GUEST_FEATURES:
303
304 if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
305 val = virtio_bus_get_vdev_bad_features(&proxy->bus);
306 }
307 virtio_set_features(vdev, val);
308 break;
309 case VIRTIO_PCI_QUEUE_PFN:
310 pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
311 if (pa == 0) {
312 virtio_pci_reset(DEVICE(proxy));
313 }
314 else
315 virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
316 break;
317 case VIRTIO_PCI_QUEUE_SEL:
318 if (val < VIRTIO_QUEUE_MAX)
319 vdev->queue_sel = val;
320 break;
321 case VIRTIO_PCI_QUEUE_NOTIFY:
322 if (val < VIRTIO_QUEUE_MAX) {
323 virtio_queue_notify(vdev, val);
324 }
325 break;
326 case VIRTIO_PCI_STATUS:
327 if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
328 virtio_pci_stop_ioeventfd(proxy);
329 }
330
331 virtio_set_status(vdev, val & 0xFF);
332
333 if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
334 virtio_pci_start_ioeventfd(proxy);
335 }
336
337 if (vdev->status == 0) {
338 virtio_pci_reset(DEVICE(proxy));
339 }
340
341
342
343
344
345 if (val == (VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER)) {
346 pci_default_write_config(&proxy->pci_dev, PCI_COMMAND,
347 proxy->pci_dev.config[PCI_COMMAND] |
348 PCI_COMMAND_MASTER, 1);
349 }
350 break;
351 case VIRTIO_MSI_CONFIG_VECTOR:
352 msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
353
354 if (msix_vector_use(&proxy->pci_dev, val) < 0)
355 val = VIRTIO_NO_VECTOR;
356 vdev->config_vector = val;
357 break;
358 case VIRTIO_MSI_QUEUE_VECTOR:
359 msix_vector_unuse(&proxy->pci_dev,
360 virtio_queue_vector(vdev, vdev->queue_sel));
361
362 if (msix_vector_use(&proxy->pci_dev, val) < 0)
363 val = VIRTIO_NO_VECTOR;
364 virtio_queue_set_vector(vdev, vdev->queue_sel, val);
365 break;
366 default:
367 error_report("%s: unexpected address 0x%x value 0x%x",
368 __func__, addr, val);
369 break;
370 }
371}
372
373static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
374{
375 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
376 uint32_t ret = 0xFFFFFFFF;
377
378 switch (addr) {
379 case VIRTIO_PCI_HOST_FEATURES:
380 ret = vdev->host_features;
381 break;
382 case VIRTIO_PCI_GUEST_FEATURES:
383 ret = vdev->guest_features;
384 break;
385 case VIRTIO_PCI_QUEUE_PFN:
386 ret = virtio_queue_get_addr(vdev, vdev->queue_sel)
387 >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
388 break;
389 case VIRTIO_PCI_QUEUE_NUM:
390 ret = virtio_queue_get_num(vdev, vdev->queue_sel);
391 break;
392 case VIRTIO_PCI_QUEUE_SEL:
393 ret = vdev->queue_sel;
394 break;
395 case VIRTIO_PCI_STATUS:
396 ret = vdev->status;
397 break;
398 case VIRTIO_PCI_ISR:
399
400 ret = atomic_xchg(&vdev->isr, 0);
401 pci_irq_deassert(&proxy->pci_dev);
402 break;
403 case VIRTIO_MSI_CONFIG_VECTOR:
404 ret = vdev->config_vector;
405 break;
406 case VIRTIO_MSI_QUEUE_VECTOR:
407 ret = virtio_queue_vector(vdev, vdev->queue_sel);
408 break;
409 default:
410 break;
411 }
412
413 return ret;
414}
415
416static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr,
417 unsigned size)
418{
419 VirtIOPCIProxy *proxy = opaque;
420 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
421 uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev);
422 uint64_t val = 0;
423 if (addr < config) {
424 return virtio_ioport_read(proxy, addr);
425 }
426 addr -= config;
427
428 switch (size) {
429 case 1:
430 val = virtio_config_readb(vdev, addr);
431 break;
432 case 2:
433 val = virtio_config_readw(vdev, addr);
434 if (virtio_is_big_endian(vdev)) {
435 val = bswap16(val);
436 }
437 break;
438 case 4:
439 val = virtio_config_readl(vdev, addr);
440 if (virtio_is_big_endian(vdev)) {
441 val = bswap32(val);
442 }
443 break;
444 }
445 return val;
446}
447
448static void virtio_pci_config_write(void *opaque, hwaddr addr,
449 uint64_t val, unsigned size)
450{
451 VirtIOPCIProxy *proxy = opaque;
452 uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev);
453 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
454 if (addr < config) {
455 virtio_ioport_write(proxy, addr, val);
456 return;
457 }
458 addr -= config;
459
460
461
462
463 switch (size) {
464 case 1:
465 virtio_config_writeb(vdev, addr, val);
466 break;
467 case 2:
468 if (virtio_is_big_endian(vdev)) {
469 val = bswap16(val);
470 }
471 virtio_config_writew(vdev, addr, val);
472 break;
473 case 4:
474 if (virtio_is_big_endian(vdev)) {
475 val = bswap32(val);
476 }
477 virtio_config_writel(vdev, addr, val);
478 break;
479 }
480}
481
482static const MemoryRegionOps virtio_pci_config_ops = {
483 .read = virtio_pci_config_read,
484 .write = virtio_pci_config_write,
485 .impl = {
486 .min_access_size = 1,
487 .max_access_size = 4,
488 },
489 .endianness = DEVICE_LITTLE_ENDIAN,
490};
491
492static MemoryRegion *virtio_address_space_lookup(VirtIOPCIProxy *proxy,
493 hwaddr *off, int len)
494{
495 int i;
496 VirtIOPCIRegion *reg;
497
498 for (i = 0; i < ARRAY_SIZE(proxy->regs); ++i) {
499 reg = &proxy->regs[i];
500 if (*off >= reg->offset &&
501 *off + len <= reg->offset + reg->size) {
502 *off -= reg->offset;
503 return ®->mr;
504 }
505 }
506
507 return NULL;
508}
509
510
511
512
513
514
515
516
517
518
519
520
521
522static
523void virtio_address_space_write(VirtIOPCIProxy *proxy, hwaddr addr,
524 const uint8_t *buf, int len)
525{
526 uint64_t val;
527 MemoryRegion *mr;
528
529
530
531
532 addr &= ~(len - 1);
533
534 mr = virtio_address_space_lookup(proxy, &addr, len);
535 if (!mr) {
536 return;
537 }
538
539
540 assert(!(((uintptr_t)buf) & (len - 1)));
541
542 switch (len) {
543 case 1:
544 val = pci_get_byte(buf);
545 break;
546 case 2:
547 val = pci_get_word(buf);
548 break;
549 case 4:
550 val = pci_get_long(buf);
551 break;
552 default:
553
554 return;
555 }
556 memory_region_dispatch_write(mr, addr, val, size_memop(len) | MO_LE,
557 MEMTXATTRS_UNSPECIFIED);
558}
559
560static void
561virtio_address_space_read(VirtIOPCIProxy *proxy, hwaddr addr,
562 uint8_t *buf, int len)
563{
564 uint64_t val;
565 MemoryRegion *mr;
566
567
568
569
570 addr &= ~(len - 1);
571
572 mr = virtio_address_space_lookup(proxy, &addr, len);
573 if (!mr) {
574 return;
575 }
576
577
578 assert(!(((uintptr_t)buf) & (len - 1)));
579
580 memory_region_dispatch_read(mr, addr, &val, size_memop(len) | MO_LE,
581 MEMTXATTRS_UNSPECIFIED);
582 switch (len) {
583 case 1:
584 pci_set_byte(buf, val);
585 break;
586 case 2:
587 pci_set_word(buf, val);
588 break;
589 case 4:
590 pci_set_long(buf, val);
591 break;
592 default:
593
594 break;
595 }
596}
597
598static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
599 uint32_t val, int len)
600{
601 VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
602 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
603 struct virtio_pci_cfg_cap *cfg;
604
605 pci_default_write_config(pci_dev, address, val, len);
606
607 if (proxy->flags & VIRTIO_PCI_FLAG_INIT_FLR) {
608 pcie_cap_flr_write_config(pci_dev, address, val, len);
609 }
610
611 if (range_covers_byte(address, len, PCI_COMMAND) &&
612 !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
613 virtio_pci_stop_ioeventfd(proxy);
614 virtio_set_status(vdev, vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
615 }
616
617 if (proxy->config_cap &&
618 ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap,
619 pci_cfg_data),
620 sizeof cfg->pci_cfg_data)) {
621 uint32_t off;
622 uint32_t len;
623
624 cfg = (void *)(proxy->pci_dev.config + proxy->config_cap);
625 off = le32_to_cpu(cfg->cap.offset);
626 len = le32_to_cpu(cfg->cap.length);
627
628 if (len == 1 || len == 2 || len == 4) {
629 assert(len <= sizeof cfg->pci_cfg_data);
630 virtio_address_space_write(proxy, off, cfg->pci_cfg_data, len);
631 }
632 }
633}
634
635static uint32_t virtio_read_config(PCIDevice *pci_dev,
636 uint32_t address, int len)
637{
638 VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
639 struct virtio_pci_cfg_cap *cfg;
640
641 if (proxy->config_cap &&
642 ranges_overlap(address, len, proxy->config_cap + offsetof(struct virtio_pci_cfg_cap,
643 pci_cfg_data),
644 sizeof cfg->pci_cfg_data)) {
645 uint32_t off;
646 uint32_t len;
647
648 cfg = (void *)(proxy->pci_dev.config + proxy->config_cap);
649 off = le32_to_cpu(cfg->cap.offset);
650 len = le32_to_cpu(cfg->cap.length);
651
652 if (len == 1 || len == 2 || len == 4) {
653 assert(len <= sizeof cfg->pci_cfg_data);
654 virtio_address_space_read(proxy, off, cfg->pci_cfg_data, len);
655 }
656 }
657
658 return pci_default_read_config(pci_dev, address, len);
659}
660
661static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy,
662 unsigned int queue_no,
663 unsigned int vector)
664{
665 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
666 int ret;
667
668 if (irqfd->users == 0) {
669 ret = kvm_irqchip_add_msi_route(kvm_state, vector, &proxy->pci_dev);
670 if (ret < 0) {
671 return ret;
672 }
673 irqfd->virq = ret;
674 }
675 irqfd->users++;
676 return 0;
677}
678
679static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy,
680 unsigned int vector)
681{
682 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
683 if (--irqfd->users == 0) {
684 kvm_irqchip_release_virq(kvm_state, irqfd->virq);
685 }
686}
687
688static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy,
689 unsigned int queue_no,
690 unsigned int vector)
691{
692 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
693 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
694 VirtQueue *vq = virtio_get_queue(vdev, queue_no);
695 EventNotifier *n = virtio_queue_get_guest_notifier(vq);
696 return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, n, NULL, irqfd->virq);
697}
698
699static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy,
700 unsigned int queue_no,
701 unsigned int vector)
702{
703 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
704 VirtQueue *vq = virtio_get_queue(vdev, queue_no);
705 EventNotifier *n = virtio_queue_get_guest_notifier(vq);
706 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
707 int ret;
708
709 ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, n, irqfd->virq);
710 assert(ret == 0);
711}
712
713static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
714{
715 PCIDevice *dev = &proxy->pci_dev;
716 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
717 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
718 unsigned int vector;
719 int ret, queue_no;
720
721 for (queue_no = 0; queue_no < nvqs; queue_no++) {
722 if (!virtio_queue_get_num(vdev, queue_no)) {
723 break;
724 }
725 vector = virtio_queue_vector(vdev, queue_no);
726 if (vector >= msix_nr_vectors_allocated(dev)) {
727 continue;
728 }
729 ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector);
730 if (ret < 0) {
731 goto undo;
732 }
733
734
735
736 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
737 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
738 if (ret < 0) {
739 kvm_virtio_pci_vq_vector_release(proxy, vector);
740 goto undo;
741 }
742 }
743 }
744 return 0;
745
746undo:
747 while (--queue_no >= 0) {
748 vector = virtio_queue_vector(vdev, queue_no);
749 if (vector >= msix_nr_vectors_allocated(dev)) {
750 continue;
751 }
752 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
753 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
754 }
755 kvm_virtio_pci_vq_vector_release(proxy, vector);
756 }
757 return ret;
758}
759
760static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
761{
762 PCIDevice *dev = &proxy->pci_dev;
763 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
764 unsigned int vector;
765 int queue_no;
766 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
767
768 for (queue_no = 0; queue_no < nvqs; queue_no++) {
769 if (!virtio_queue_get_num(vdev, queue_no)) {
770 break;
771 }
772 vector = virtio_queue_vector(vdev, queue_no);
773 if (vector >= msix_nr_vectors_allocated(dev)) {
774 continue;
775 }
776
777
778
779 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
780 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
781 }
782 kvm_virtio_pci_vq_vector_release(proxy, vector);
783 }
784}
785
786static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy,
787 unsigned int queue_no,
788 unsigned int vector,
789 MSIMessage msg)
790{
791 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
792 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
793 VirtQueue *vq = virtio_get_queue(vdev, queue_no);
794 EventNotifier *n = virtio_queue_get_guest_notifier(vq);
795 VirtIOIRQFD *irqfd;
796 int ret = 0;
797
798 if (proxy->vector_irqfd) {
799 irqfd = &proxy->vector_irqfd[vector];
800 if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) {
801 ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg,
802 &proxy->pci_dev);
803 if (ret < 0) {
804 return ret;
805 }
806 kvm_irqchip_commit_routes(kvm_state);
807 }
808 }
809
810
811
812
813 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
814 k->guest_notifier_mask(vdev, queue_no, false);
815
816 if (k->guest_notifier_pending &&
817 k->guest_notifier_pending(vdev, queue_no)) {
818 event_notifier_set(n);
819 }
820 } else {
821 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
822 }
823 return ret;
824}
825
826static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy,
827 unsigned int queue_no,
828 unsigned int vector)
829{
830 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
831 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
832
833
834
835
836 if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
837 k->guest_notifier_mask(vdev, queue_no, true);
838 } else {
839 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
840 }
841}
842
843static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector,
844 MSIMessage msg)
845{
846 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
847 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
848 VirtQueue *vq = virtio_vector_first_queue(vdev, vector);
849 int ret, index, unmasked = 0;
850
851 while (vq) {
852 index = virtio_get_queue_index(vq);
853 if (!virtio_queue_get_num(vdev, index)) {
854 break;
855 }
856 if (index < proxy->nvqs_with_notifiers) {
857 ret = virtio_pci_vq_vector_unmask(proxy, index, vector, msg);
858 if (ret < 0) {
859 goto undo;
860 }
861 ++unmasked;
862 }
863 vq = virtio_vector_next_queue(vq);
864 }
865
866 return 0;
867
868undo:
869 vq = virtio_vector_first_queue(vdev, vector);
870 while (vq && unmasked >= 0) {
871 index = virtio_get_queue_index(vq);
872 if (index < proxy->nvqs_with_notifiers) {
873 virtio_pci_vq_vector_mask(proxy, index, vector);
874 --unmasked;
875 }
876 vq = virtio_vector_next_queue(vq);
877 }
878 return ret;
879}
880
881static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector)
882{
883 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
884 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
885 VirtQueue *vq = virtio_vector_first_queue(vdev, vector);
886 int index;
887
888 while (vq) {
889 index = virtio_get_queue_index(vq);
890 if (!virtio_queue_get_num(vdev, index)) {
891 break;
892 }
893 if (index < proxy->nvqs_with_notifiers) {
894 virtio_pci_vq_vector_mask(proxy, index, vector);
895 }
896 vq = virtio_vector_next_queue(vq);
897 }
898}
899
900static void virtio_pci_vector_poll(PCIDevice *dev,
901 unsigned int vector_start,
902 unsigned int vector_end)
903{
904 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
905 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
906 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
907 int queue_no;
908 unsigned int vector;
909 EventNotifier *notifier;
910 VirtQueue *vq;
911
912 for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
913 if (!virtio_queue_get_num(vdev, queue_no)) {
914 break;
915 }
916 vector = virtio_queue_vector(vdev, queue_no);
917 if (vector < vector_start || vector >= vector_end ||
918 !msix_is_masked(dev, vector)) {
919 continue;
920 }
921 vq = virtio_get_queue(vdev, queue_no);
922 notifier = virtio_queue_get_guest_notifier(vq);
923 if (k->guest_notifier_pending) {
924 if (k->guest_notifier_pending(vdev, queue_no)) {
925 msix_set_pending(dev, vector);
926 }
927 } else if (event_notifier_test_and_clear(notifier)) {
928 msix_set_pending(dev, vector);
929 }
930 }
931}
932
933static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
934 bool with_irqfd)
935{
936 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
937 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
938 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
939 VirtQueue *vq = virtio_get_queue(vdev, n);
940 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
941
942 if (assign) {
943 int r = event_notifier_init(notifier, 0);
944 if (r < 0) {
945 return r;
946 }
947 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
948 } else {
949 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
950 event_notifier_cleanup(notifier);
951 }
952
953 if (!msix_enabled(&proxy->pci_dev) &&
954 vdev->use_guest_notifier_mask &&
955 vdc->guest_notifier_mask) {
956 vdc->guest_notifier_mask(vdev, n, !assign);
957 }
958
959 return 0;
960}
961
962static bool virtio_pci_query_guest_notifiers(DeviceState *d)
963{
964 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
965 return msix_enabled(&proxy->pci_dev);
966}
967
968static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
969{
970 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
971 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
972 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
973 int r, n;
974 bool with_irqfd = msix_enabled(&proxy->pci_dev) &&
975 kvm_msi_via_irqfd_enabled();
976
977 nvqs = MIN(nvqs, VIRTIO_QUEUE_MAX);
978
979
980
981
982 assert(assign || nvqs == proxy->nvqs_with_notifiers);
983
984 proxy->nvqs_with_notifiers = nvqs;
985
986
987 if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) {
988 msix_unset_vector_notifiers(&proxy->pci_dev);
989 if (proxy->vector_irqfd) {
990 kvm_virtio_pci_vector_release(proxy, nvqs);
991 g_free(proxy->vector_irqfd);
992 proxy->vector_irqfd = NULL;
993 }
994 }
995
996 for (n = 0; n < nvqs; n++) {
997 if (!virtio_queue_get_num(vdev, n)) {
998 break;
999 }
1000
1001 r = virtio_pci_set_guest_notifier(d, n, assign, with_irqfd);
1002 if (r < 0) {
1003 goto assign_error;
1004 }
1005 }
1006
1007
1008 if ((with_irqfd || k->guest_notifier_mask) && assign) {
1009 if (with_irqfd) {
1010 proxy->vector_irqfd =
1011 g_malloc0(sizeof(*proxy->vector_irqfd) *
1012 msix_nr_vectors_allocated(&proxy->pci_dev));
1013 r = kvm_virtio_pci_vector_use(proxy, nvqs);
1014 if (r < 0) {
1015 goto assign_error;
1016 }
1017 }
1018 r = msix_set_vector_notifiers(&proxy->pci_dev,
1019 virtio_pci_vector_unmask,
1020 virtio_pci_vector_mask,
1021 virtio_pci_vector_poll);
1022 if (r < 0) {
1023 goto notifiers_error;
1024 }
1025 }
1026
1027 return 0;
1028
1029notifiers_error:
1030 if (with_irqfd) {
1031 assert(assign);
1032 kvm_virtio_pci_vector_release(proxy, nvqs);
1033 }
1034
1035assign_error:
1036
1037 assert(assign);
1038 while (--n >= 0) {
1039 virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd);
1040 }
1041 return r;
1042}
1043
1044static int virtio_pci_set_host_notifier_mr(DeviceState *d, int n,
1045 MemoryRegion *mr, bool assign)
1046{
1047 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
1048 int offset;
1049
1050 if (n >= VIRTIO_QUEUE_MAX || !virtio_pci_modern(proxy) ||
1051 virtio_pci_queue_mem_mult(proxy) != memory_region_size(mr)) {
1052 return -1;
1053 }
1054
1055 if (assign) {
1056 offset = virtio_pci_queue_mem_mult(proxy) * n;
1057 memory_region_add_subregion_overlap(&proxy->notify.mr, offset, mr, 1);
1058 } else {
1059 memory_region_del_subregion(&proxy->notify.mr, mr);
1060 }
1061
1062 return 0;
1063}
1064
1065static 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
1072
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
1088
1089
1090
1091static int virtio_pci_query_nvectors(DeviceState *d)
1092{
1093 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1094
1095 return proxy->nvectors;
1096}
1097
1098static AddressSpace *virtio_pci_get_dma_as(DeviceState *d)
1099{
1100 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1101 PCIDevice *dev = &proxy->pci_dev;
1102
1103 return pci_get_address_space(dev);
1104}
1105
1106static int virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy,
1107 struct virtio_pci_cap *cap)
1108{
1109 PCIDevice *dev = &proxy->pci_dev;
1110 int offset;
1111
1112 offset = pci_add_capability(dev, PCI_CAP_ID_VNDR, 0,
1113 cap->cap_len, &error_abort);
1114
1115 assert(cap->cap_len >= sizeof *cap);
1116 memcpy(dev->config + offset + PCI_CAP_FLAGS, &cap->cap_len,
1117 cap->cap_len - PCI_CAP_FLAGS);
1118
1119 return offset;
1120}
1121
1122static uint64_t virtio_pci_common_read(void *opaque, hwaddr addr,
1123 unsigned size)
1124{
1125 VirtIOPCIProxy *proxy = opaque;
1126 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1127 uint32_t val = 0;
1128 int i;
1129
1130 switch (addr) {
1131 case VIRTIO_PCI_COMMON_DFSELECT:
1132 val = proxy->dfselect;
1133 break;
1134 case VIRTIO_PCI_COMMON_DF:
1135 if (proxy->dfselect <= 1) {
1136 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
1137
1138 val = (vdev->host_features & ~vdc->legacy_features) >>
1139 (32 * proxy->dfselect);
1140 }
1141 break;
1142 case VIRTIO_PCI_COMMON_GFSELECT:
1143 val = proxy->gfselect;
1144 break;
1145 case VIRTIO_PCI_COMMON_GF:
1146 if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) {
1147 val = proxy->guest_features[proxy->gfselect];
1148 }
1149 break;
1150 case VIRTIO_PCI_COMMON_MSIX:
1151 val = vdev->config_vector;
1152 break;
1153 case VIRTIO_PCI_COMMON_NUMQ:
1154 for (i = 0; i < VIRTIO_QUEUE_MAX; ++i) {
1155 if (virtio_queue_get_num(vdev, i)) {
1156 val = i + 1;
1157 }
1158 }
1159 break;
1160 case VIRTIO_PCI_COMMON_STATUS:
1161 val = vdev->status;
1162 break;
1163 case VIRTIO_PCI_COMMON_CFGGENERATION:
1164 val = vdev->generation;
1165 break;
1166 case VIRTIO_PCI_COMMON_Q_SELECT:
1167 val = vdev->queue_sel;
1168 break;
1169 case VIRTIO_PCI_COMMON_Q_SIZE:
1170 val = virtio_queue_get_num(vdev, vdev->queue_sel);
1171 break;
1172 case VIRTIO_PCI_COMMON_Q_MSIX:
1173 val = virtio_queue_vector(vdev, vdev->queue_sel);
1174 break;
1175 case VIRTIO_PCI_COMMON_Q_ENABLE:
1176 val = proxy->vqs[vdev->queue_sel].enabled;
1177 break;
1178 case VIRTIO_PCI_COMMON_Q_NOFF:
1179
1180 val = vdev->queue_sel;
1181 break;
1182 case VIRTIO_PCI_COMMON_Q_DESCLO:
1183 val = proxy->vqs[vdev->queue_sel].desc[0];
1184 break;
1185 case VIRTIO_PCI_COMMON_Q_DESCHI:
1186 val = proxy->vqs[vdev->queue_sel].desc[1];
1187 break;
1188 case VIRTIO_PCI_COMMON_Q_AVAILLO:
1189 val = proxy->vqs[vdev->queue_sel].avail[0];
1190 break;
1191 case VIRTIO_PCI_COMMON_Q_AVAILHI:
1192 val = proxy->vqs[vdev->queue_sel].avail[1];
1193 break;
1194 case VIRTIO_PCI_COMMON_Q_USEDLO:
1195 val = proxy->vqs[vdev->queue_sel].used[0];
1196 break;
1197 case VIRTIO_PCI_COMMON_Q_USEDHI:
1198 val = proxy->vqs[vdev->queue_sel].used[1];
1199 break;
1200 default:
1201 val = 0;
1202 }
1203
1204 return val;
1205}
1206
1207static void virtio_pci_common_write(void *opaque, hwaddr addr,
1208 uint64_t val, unsigned size)
1209{
1210 VirtIOPCIProxy *proxy = opaque;
1211 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1212
1213 switch (addr) {
1214 case VIRTIO_PCI_COMMON_DFSELECT:
1215 proxy->dfselect = val;
1216 break;
1217 case VIRTIO_PCI_COMMON_GFSELECT:
1218 proxy->gfselect = val;
1219 break;
1220 case VIRTIO_PCI_COMMON_GF:
1221 if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) {
1222 proxy->guest_features[proxy->gfselect] = val;
1223 virtio_set_features(vdev,
1224 (((uint64_t)proxy->guest_features[1]) << 32) |
1225 proxy->guest_features[0]);
1226 }
1227 break;
1228 case VIRTIO_PCI_COMMON_MSIX:
1229 msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
1230
1231 if (msix_vector_use(&proxy->pci_dev, val) < 0) {
1232 val = VIRTIO_NO_VECTOR;
1233 }
1234 vdev->config_vector = val;
1235 break;
1236 case VIRTIO_PCI_COMMON_STATUS:
1237 if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
1238 virtio_pci_stop_ioeventfd(proxy);
1239 }
1240
1241 virtio_set_status(vdev, val & 0xFF);
1242
1243 if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
1244 virtio_pci_start_ioeventfd(proxy);
1245 }
1246
1247 if (vdev->status == 0) {
1248 virtio_pci_reset(DEVICE(proxy));
1249 }
1250
1251 break;
1252 case VIRTIO_PCI_COMMON_Q_SELECT:
1253 if (val < VIRTIO_QUEUE_MAX) {
1254 vdev->queue_sel = val;
1255 }
1256 break;
1257 case VIRTIO_PCI_COMMON_Q_SIZE:
1258 proxy->vqs[vdev->queue_sel].num = val;
1259 virtio_queue_set_num(vdev, vdev->queue_sel,
1260 proxy->vqs[vdev->queue_sel].num);
1261 break;
1262 case VIRTIO_PCI_COMMON_Q_MSIX:
1263 msix_vector_unuse(&proxy->pci_dev,
1264 virtio_queue_vector(vdev, vdev->queue_sel));
1265
1266 if (msix_vector_use(&proxy->pci_dev, val) < 0) {
1267 val = VIRTIO_NO_VECTOR;
1268 }
1269 virtio_queue_set_vector(vdev, vdev->queue_sel, val);
1270 break;
1271 case VIRTIO_PCI_COMMON_Q_ENABLE:
1272 virtio_queue_set_num(vdev, vdev->queue_sel,
1273 proxy->vqs[vdev->queue_sel].num);
1274 virtio_queue_set_rings(vdev, vdev->queue_sel,
1275 ((uint64_t)proxy->vqs[vdev->queue_sel].desc[1]) << 32 |
1276 proxy->vqs[vdev->queue_sel].desc[0],
1277 ((uint64_t)proxy->vqs[vdev->queue_sel].avail[1]) << 32 |
1278 proxy->vqs[vdev->queue_sel].avail[0],
1279 ((uint64_t)proxy->vqs[vdev->queue_sel].used[1]) << 32 |
1280 proxy->vqs[vdev->queue_sel].used[0]);
1281 proxy->vqs[vdev->queue_sel].enabled = 1;
1282 break;
1283 case VIRTIO_PCI_COMMON_Q_DESCLO:
1284 proxy->vqs[vdev->queue_sel].desc[0] = val;
1285 break;
1286 case VIRTIO_PCI_COMMON_Q_DESCHI:
1287 proxy->vqs[vdev->queue_sel].desc[1] = val;
1288 break;
1289 case VIRTIO_PCI_COMMON_Q_AVAILLO:
1290 proxy->vqs[vdev->queue_sel].avail[0] = val;
1291 break;
1292 case VIRTIO_PCI_COMMON_Q_AVAILHI:
1293 proxy->vqs[vdev->queue_sel].avail[1] = val;
1294 break;
1295 case VIRTIO_PCI_COMMON_Q_USEDLO:
1296 proxy->vqs[vdev->queue_sel].used[0] = val;
1297 break;
1298 case VIRTIO_PCI_COMMON_Q_USEDHI:
1299 proxy->vqs[vdev->queue_sel].used[1] = val;
1300 break;
1301 default:
1302 break;
1303 }
1304}
1305
1306
1307static uint64_t virtio_pci_notify_read(void *opaque, hwaddr addr,
1308 unsigned size)
1309{
1310 return 0;
1311}
1312
1313static void virtio_pci_notify_write(void *opaque, hwaddr addr,
1314 uint64_t val, unsigned size)
1315{
1316 VirtIODevice *vdev = opaque;
1317 VirtIOPCIProxy *proxy = VIRTIO_PCI(DEVICE(vdev)->parent_bus->parent);
1318 unsigned queue = addr / virtio_pci_queue_mem_mult(proxy);
1319
1320 if (queue < VIRTIO_QUEUE_MAX) {
1321 virtio_queue_notify(vdev, queue);
1322 }
1323}
1324
1325static void virtio_pci_notify_write_pio(void *opaque, hwaddr addr,
1326 uint64_t val, unsigned size)
1327{
1328 VirtIODevice *vdev = opaque;
1329 unsigned queue = val;
1330
1331 if (queue < VIRTIO_QUEUE_MAX) {
1332 virtio_queue_notify(vdev, queue);
1333 }
1334}
1335
1336static uint64_t virtio_pci_isr_read(void *opaque, hwaddr addr,
1337 unsigned size)
1338{
1339 VirtIOPCIProxy *proxy = opaque;
1340 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1341 uint64_t val = atomic_xchg(&vdev->isr, 0);
1342 pci_irq_deassert(&proxy->pci_dev);
1343
1344 return val;
1345}
1346
1347static void virtio_pci_isr_write(void *opaque, hwaddr addr,
1348 uint64_t val, unsigned size)
1349{
1350}
1351
1352static uint64_t virtio_pci_device_read(void *opaque, hwaddr addr,
1353 unsigned size)
1354{
1355 VirtIODevice *vdev = opaque;
1356 uint64_t val = 0;
1357
1358 switch (size) {
1359 case 1:
1360 val = virtio_config_modern_readb(vdev, addr);
1361 break;
1362 case 2:
1363 val = virtio_config_modern_readw(vdev, addr);
1364 break;
1365 case 4:
1366 val = virtio_config_modern_readl(vdev, addr);
1367 break;
1368 }
1369 return val;
1370}
1371
1372static void virtio_pci_device_write(void *opaque, hwaddr addr,
1373 uint64_t val, unsigned size)
1374{
1375 VirtIODevice *vdev = opaque;
1376 switch (size) {
1377 case 1:
1378 virtio_config_modern_writeb(vdev, addr, val);
1379 break;
1380 case 2:
1381 virtio_config_modern_writew(vdev, addr, val);
1382 break;
1383 case 4:
1384 virtio_config_modern_writel(vdev, addr, val);
1385 break;
1386 }
1387}
1388
1389static void virtio_pci_modern_regions_init(VirtIOPCIProxy *proxy)
1390{
1391 static const MemoryRegionOps common_ops = {
1392 .read = virtio_pci_common_read,
1393 .write = virtio_pci_common_write,
1394 .impl = {
1395 .min_access_size = 1,
1396 .max_access_size = 4,
1397 },
1398 .endianness = DEVICE_LITTLE_ENDIAN,
1399 };
1400 static const MemoryRegionOps isr_ops = {
1401 .read = virtio_pci_isr_read,
1402 .write = virtio_pci_isr_write,
1403 .impl = {
1404 .min_access_size = 1,
1405 .max_access_size = 4,
1406 },
1407 .endianness = DEVICE_LITTLE_ENDIAN,
1408 };
1409 static const MemoryRegionOps device_ops = {
1410 .read = virtio_pci_device_read,
1411 .write = virtio_pci_device_write,
1412 .impl = {
1413 .min_access_size = 1,
1414 .max_access_size = 4,
1415 },
1416 .endianness = DEVICE_LITTLE_ENDIAN,
1417 };
1418 static const MemoryRegionOps notify_ops = {
1419 .read = virtio_pci_notify_read,
1420 .write = virtio_pci_notify_write,
1421 .impl = {
1422 .min_access_size = 1,
1423 .max_access_size = 4,
1424 },
1425 .endianness = DEVICE_LITTLE_ENDIAN,
1426 };
1427 static const MemoryRegionOps notify_pio_ops = {
1428 .read = virtio_pci_notify_read,
1429 .write = virtio_pci_notify_write_pio,
1430 .impl = {
1431 .min_access_size = 1,
1432 .max_access_size = 4,
1433 },
1434 .endianness = DEVICE_LITTLE_ENDIAN,
1435 };
1436
1437
1438 memory_region_init_io(&proxy->common.mr, OBJECT(proxy),
1439 &common_ops,
1440 proxy,
1441 "virtio-pci-common",
1442 proxy->common.size);
1443
1444 memory_region_init_io(&proxy->isr.mr, OBJECT(proxy),
1445 &isr_ops,
1446 proxy,
1447 "virtio-pci-isr",
1448 proxy->isr.size);
1449
1450 memory_region_init_io(&proxy->device.mr, OBJECT(proxy),
1451 &device_ops,
1452 virtio_bus_get_device(&proxy->bus),
1453 "virtio-pci-device",
1454 proxy->device.size);
1455
1456 memory_region_init_io(&proxy->notify.mr, OBJECT(proxy),
1457 ¬ify_ops,
1458 virtio_bus_get_device(&proxy->bus),
1459 "virtio-pci-notify",
1460 proxy->notify.size);
1461
1462 memory_region_init_io(&proxy->notify_pio.mr, OBJECT(proxy),
1463 ¬ify_pio_ops,
1464 virtio_bus_get_device(&proxy->bus),
1465 "virtio-pci-notify-pio",
1466 proxy->notify_pio.size);
1467}
1468
1469static void virtio_pci_modern_region_map(VirtIOPCIProxy *proxy,
1470 VirtIOPCIRegion *region,
1471 struct virtio_pci_cap *cap,
1472 MemoryRegion *mr,
1473 uint8_t bar)
1474{
1475 memory_region_add_subregion(mr, region->offset, ®ion->mr);
1476
1477 cap->cfg_type = region->type;
1478 cap->bar = bar;
1479 cap->offset = cpu_to_le32(region->offset);
1480 cap->length = cpu_to_le32(region->size);
1481 virtio_pci_add_mem_cap(proxy, cap);
1482
1483}
1484
1485static void virtio_pci_modern_mem_region_map(VirtIOPCIProxy *proxy,
1486 VirtIOPCIRegion *region,
1487 struct virtio_pci_cap *cap)
1488{
1489 virtio_pci_modern_region_map(proxy, region, cap,
1490 &proxy->modern_bar, proxy->modern_mem_bar_idx);
1491}
1492
1493static void virtio_pci_modern_io_region_map(VirtIOPCIProxy *proxy,
1494 VirtIOPCIRegion *region,
1495 struct virtio_pci_cap *cap)
1496{
1497 virtio_pci_modern_region_map(proxy, region, cap,
1498 &proxy->io_bar, proxy->modern_io_bar_idx);
1499}
1500
1501static void virtio_pci_modern_mem_region_unmap(VirtIOPCIProxy *proxy,
1502 VirtIOPCIRegion *region)
1503{
1504 memory_region_del_subregion(&proxy->modern_bar,
1505 ®ion->mr);
1506}
1507
1508static void virtio_pci_modern_io_region_unmap(VirtIOPCIProxy *proxy,
1509 VirtIOPCIRegion *region)
1510{
1511 memory_region_del_subregion(&proxy->io_bar,
1512 ®ion->mr);
1513}
1514
1515static void virtio_pci_pre_plugged(DeviceState *d, Error **errp)
1516{
1517 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1518 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1519
1520 if (virtio_pci_modern(proxy)) {
1521 virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1);
1522 }
1523
1524 virtio_add_feature(&vdev->host_features, VIRTIO_F_BAD_FEATURE);
1525}
1526
1527
1528static void virtio_pci_device_plugged(DeviceState *d, Error **errp)
1529{
1530 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1531 VirtioBusState *bus = &proxy->bus;
1532 bool legacy = virtio_pci_legacy(proxy);
1533 bool modern;
1534 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
1535 uint8_t *config;
1536 uint32_t size;
1537 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
1538
1539
1540
1541
1542
1543 if (!proxy->ignore_backend_features &&
1544 !virtio_has_feature(vdev->host_features, VIRTIO_F_VERSION_1)) {
1545 virtio_pci_disable_modern(proxy);
1546
1547 if (!legacy) {
1548 error_setg(errp, "Device doesn't support modern mode, and legacy"
1549 " mode is disabled");
1550 error_append_hint(errp, "Set disable-legacy to off\n");
1551
1552 return;
1553 }
1554 }
1555
1556 modern = virtio_pci_modern(proxy);
1557
1558 config = proxy->pci_dev.config;
1559 if (proxy->class_code) {
1560 pci_config_set_class(config, proxy->class_code);
1561 }
1562
1563 if (legacy) {
1564 if (virtio_host_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM)) {
1565 error_setg(errp, "VIRTIO_F_IOMMU_PLATFORM was supported by"
1566 " neither legacy nor transitional device");
1567 return ;
1568 }
1569
1570
1571
1572
1573
1574 pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus));
1575 } else {
1576
1577 pci_set_word(config + PCI_VENDOR_ID,
1578 PCI_VENDOR_ID_REDHAT_QUMRANET);
1579 pci_set_word(config + PCI_DEVICE_ID,
1580 0x1040 + virtio_bus_get_vdev_id(bus));
1581 pci_config_set_revision(config, 1);
1582 }
1583 config[PCI_INTERRUPT_PIN] = 1;
1584
1585
1586 if (modern) {
1587 struct virtio_pci_cap cap = {
1588 .cap_len = sizeof cap,
1589 };
1590 struct virtio_pci_notify_cap notify = {
1591 .cap.cap_len = sizeof notify,
1592 .notify_off_multiplier =
1593 cpu_to_le32(virtio_pci_queue_mem_mult(proxy)),
1594 };
1595 struct virtio_pci_cfg_cap cfg = {
1596 .cap.cap_len = sizeof cfg,
1597 .cap.cfg_type = VIRTIO_PCI_CAP_PCI_CFG,
1598 };
1599 struct virtio_pci_notify_cap notify_pio = {
1600 .cap.cap_len = sizeof notify,
1601 .notify_off_multiplier = cpu_to_le32(0x0),
1602 };
1603
1604 struct virtio_pci_cfg_cap *cfg_mask;
1605
1606 virtio_pci_modern_regions_init(proxy);
1607
1608 virtio_pci_modern_mem_region_map(proxy, &proxy->common, &cap);
1609 virtio_pci_modern_mem_region_map(proxy, &proxy->isr, &cap);
1610 virtio_pci_modern_mem_region_map(proxy, &proxy->device, &cap);
1611 virtio_pci_modern_mem_region_map(proxy, &proxy->notify, ¬ify.cap);
1612
1613 if (modern_pio) {
1614 memory_region_init(&proxy->io_bar, OBJECT(proxy),
1615 "virtio-pci-io", 0x4);
1616
1617 pci_register_bar(&proxy->pci_dev, proxy->modern_io_bar_idx,
1618 PCI_BASE_ADDRESS_SPACE_IO, &proxy->io_bar);
1619
1620 virtio_pci_modern_io_region_map(proxy, &proxy->notify_pio,
1621 ¬ify_pio.cap);
1622 }
1623
1624 pci_register_bar(&proxy->pci_dev, proxy->modern_mem_bar_idx,
1625 PCI_BASE_ADDRESS_SPACE_MEMORY |
1626 PCI_BASE_ADDRESS_MEM_PREFETCH |
1627 PCI_BASE_ADDRESS_MEM_TYPE_64,
1628 &proxy->modern_bar);
1629
1630 proxy->config_cap = virtio_pci_add_mem_cap(proxy, &cfg.cap);
1631 cfg_mask = (void *)(proxy->pci_dev.wmask + proxy->config_cap);
1632 pci_set_byte(&cfg_mask->cap.bar, ~0x0);
1633 pci_set_long((uint8_t *)&cfg_mask->cap.offset, ~0x0);
1634 pci_set_long((uint8_t *)&cfg_mask->cap.length, ~0x0);
1635 pci_set_long(cfg_mask->pci_cfg_data, ~0x0);
1636 }
1637
1638 if (proxy->nvectors) {
1639 int err = msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors,
1640 proxy->msix_bar_idx, NULL);
1641 if (err) {
1642
1643 if (err != -ENOTSUP) {
1644 warn_report("unable to init msix vectors to %" PRIu32,
1645 proxy->nvectors);
1646 }
1647 proxy->nvectors = 0;
1648 }
1649 }
1650
1651 proxy->pci_dev.config_write = virtio_write_config;
1652 proxy->pci_dev.config_read = virtio_read_config;
1653
1654 if (legacy) {
1655 size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev)
1656 + virtio_bus_get_vdev_config_len(bus);
1657 size = pow2ceil(size);
1658
1659 memory_region_init_io(&proxy->bar, OBJECT(proxy),
1660 &virtio_pci_config_ops,
1661 proxy, "virtio-pci", size);
1662
1663 pci_register_bar(&proxy->pci_dev, proxy->legacy_io_bar_idx,
1664 PCI_BASE_ADDRESS_SPACE_IO, &proxy->bar);
1665 }
1666}
1667
1668static void virtio_pci_device_unplugged(DeviceState *d)
1669{
1670 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1671 bool modern = virtio_pci_modern(proxy);
1672 bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
1673
1674 virtio_pci_stop_ioeventfd(proxy);
1675
1676 if (modern) {
1677 virtio_pci_modern_mem_region_unmap(proxy, &proxy->common);
1678 virtio_pci_modern_mem_region_unmap(proxy, &proxy->isr);
1679 virtio_pci_modern_mem_region_unmap(proxy, &proxy->device);
1680 virtio_pci_modern_mem_region_unmap(proxy, &proxy->notify);
1681 if (modern_pio) {
1682 virtio_pci_modern_io_region_unmap(proxy, &proxy->notify_pio);
1683 }
1684 }
1685}
1686
1687static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
1688{
1689 VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
1690 VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev);
1691 bool pcie_port = pci_bus_is_express(pci_get_bus(pci_dev)) &&
1692 !pci_bus_is_root(pci_get_bus(pci_dev));
1693
1694 if (kvm_enabled() && !kvm_has_many_ioeventfds()) {
1695 proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
1696 }
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707 proxy->legacy_io_bar_idx = 0;
1708 proxy->msix_bar_idx = 1;
1709 proxy->modern_io_bar_idx = 2;
1710 proxy->modern_mem_bar_idx = 4;
1711
1712 proxy->common.offset = 0x0;
1713 proxy->common.size = 0x1000;
1714 proxy->common.type = VIRTIO_PCI_CAP_COMMON_CFG;
1715
1716 proxy->isr.offset = 0x1000;
1717 proxy->isr.size = 0x1000;
1718 proxy->isr.type = VIRTIO_PCI_CAP_ISR_CFG;
1719
1720 proxy->device.offset = 0x2000;
1721 proxy->device.size = 0x1000;
1722 proxy->device.type = VIRTIO_PCI_CAP_DEVICE_CFG;
1723
1724 proxy->notify.offset = 0x3000;
1725 proxy->notify.size = virtio_pci_queue_mem_mult(proxy) * VIRTIO_QUEUE_MAX;
1726 proxy->notify.type = VIRTIO_PCI_CAP_NOTIFY_CFG;
1727
1728 proxy->notify_pio.offset = 0x0;
1729 proxy->notify_pio.size = 0x4;
1730 proxy->notify_pio.type = VIRTIO_PCI_CAP_NOTIFY_CFG;
1731
1732
1733 memory_region_init(&proxy->modern_bar, OBJECT(proxy), "virtio-pci",
1734
1735 pow2ceil(proxy->notify.offset + proxy->notify.size));
1736
1737 if (proxy->disable_legacy == ON_OFF_AUTO_AUTO) {
1738 proxy->disable_legacy = pcie_port ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF;
1739 }
1740
1741 if (!virtio_pci_modern(proxy) && !virtio_pci_legacy(proxy)) {
1742 error_setg(errp, "device cannot work as neither modern nor legacy mode"
1743 " is enabled");
1744 error_append_hint(errp, "Set either disable-modern or disable-legacy"
1745 " to off\n");
1746 return;
1747 }
1748
1749 if (pcie_port && pci_is_express(pci_dev)) {
1750 int pos;
1751
1752 pos = pcie_endpoint_cap_init(pci_dev, 0);
1753 assert(pos > 0);
1754
1755 pos = pci_add_capability(pci_dev, PCI_CAP_ID_PM, 0,
1756 PCI_PM_SIZEOF, errp);
1757 if (pos < 0) {
1758 return;
1759 }
1760
1761 pci_dev->exp.pm_cap = pos;
1762
1763
1764
1765
1766
1767 pci_set_word(pci_dev->config + pos + PCI_PM_PMC, 0x3);
1768
1769 if (proxy->flags & VIRTIO_PCI_FLAG_INIT_DEVERR) {
1770
1771 pcie_cap_deverr_init(pci_dev);
1772 }
1773
1774 if (proxy->flags & VIRTIO_PCI_FLAG_INIT_LNKCTL) {
1775
1776 pcie_cap_lnkctl_init(pci_dev);
1777 }
1778
1779 if (proxy->flags & VIRTIO_PCI_FLAG_INIT_PM) {
1780
1781 pci_set_word(pci_dev->wmask + pos + PCI_PM_CTRL,
1782 PCI_PM_CTRL_STATE_MASK);
1783 }
1784
1785 if (proxy->flags & VIRTIO_PCI_FLAG_ATS) {
1786 pcie_ats_init(pci_dev, 256);
1787 }
1788
1789 if (proxy->flags & VIRTIO_PCI_FLAG_INIT_FLR) {
1790
1791 pcie_cap_flr_init(pci_dev);
1792 }
1793 } else {
1794
1795
1796
1797
1798 pci_dev->cap_present &= ~QEMU_PCI_CAP_EXPRESS;
1799 }
1800
1801 virtio_pci_bus_new(&proxy->bus, sizeof(proxy->bus), proxy);
1802 if (k->realize) {
1803 k->realize(proxy, errp);
1804 }
1805}
1806
1807static void virtio_pci_exit(PCIDevice *pci_dev)
1808{
1809 msix_uninit_exclusive_bar(pci_dev);
1810}
1811
1812static void virtio_pci_reset(DeviceState *qdev)
1813{
1814 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
1815 VirtioBusState *bus = VIRTIO_BUS(&proxy->bus);
1816 PCIDevice *dev = PCI_DEVICE(qdev);
1817 int i;
1818
1819 virtio_pci_stop_ioeventfd(proxy);
1820 virtio_bus_reset(bus);
1821 msix_unuse_all_vectors(&proxy->pci_dev);
1822
1823 for (i = 0; i < VIRTIO_QUEUE_MAX; i++) {
1824 proxy->vqs[i].enabled = 0;
1825 proxy->vqs[i].num = 0;
1826 proxy->vqs[i].desc[0] = proxy->vqs[i].desc[1] = 0;
1827 proxy->vqs[i].avail[0] = proxy->vqs[i].avail[1] = 0;
1828 proxy->vqs[i].used[0] = proxy->vqs[i].used[1] = 0;
1829 }
1830
1831 if (pci_is_express(dev)) {
1832 pcie_cap_deverr_reset(dev);
1833 pcie_cap_lnkctl_reset(dev);
1834
1835 pci_set_word(dev->config + dev->exp.pm_cap + PCI_PM_CTRL, 0);
1836 }
1837}
1838
1839static Property virtio_pci_properties[] = {
1840 DEFINE_PROP_BIT("virtio-pci-bus-master-bug-migration", VirtIOPCIProxy, flags,
1841 VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT, false),
1842 DEFINE_PROP_BIT("migrate-extra", VirtIOPCIProxy, flags,
1843 VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT, true),
1844 DEFINE_PROP_BIT("modern-pio-notify", VirtIOPCIProxy, flags,
1845 VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT, false),
1846 DEFINE_PROP_BIT("x-disable-pcie", VirtIOPCIProxy, flags,
1847 VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT, false),
1848 DEFINE_PROP_BIT("page-per-vq", VirtIOPCIProxy, flags,
1849 VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT, false),
1850 DEFINE_PROP_BOOL("x-ignore-backend-features", VirtIOPCIProxy,
1851 ignore_backend_features, false),
1852 DEFINE_PROP_BIT("ats", VirtIOPCIProxy, flags,
1853 VIRTIO_PCI_FLAG_ATS_BIT, false),
1854 DEFINE_PROP_BIT("x-pcie-deverr-init", VirtIOPCIProxy, flags,
1855 VIRTIO_PCI_FLAG_INIT_DEVERR_BIT, true),
1856 DEFINE_PROP_BIT("x-pcie-lnkctl-init", VirtIOPCIProxy, flags,
1857 VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT, true),
1858 DEFINE_PROP_BIT("x-pcie-pm-init", VirtIOPCIProxy, flags,
1859 VIRTIO_PCI_FLAG_INIT_PM_BIT, true),
1860 DEFINE_PROP_BIT("x-pcie-flr-init", VirtIOPCIProxy, flags,
1861 VIRTIO_PCI_FLAG_INIT_FLR_BIT, true),
1862 DEFINE_PROP_END_OF_LIST(),
1863};
1864
1865static void virtio_pci_dc_realize(DeviceState *qdev, Error **errp)
1866{
1867 VirtioPCIClass *vpciklass = VIRTIO_PCI_GET_CLASS(qdev);
1868 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
1869 PCIDevice *pci_dev = &proxy->pci_dev;
1870
1871 if (!(proxy->flags & VIRTIO_PCI_FLAG_DISABLE_PCIE) &&
1872 virtio_pci_modern(proxy)) {
1873 pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
1874 }
1875
1876 vpciklass->parent_dc_realize(qdev, errp);
1877}
1878
1879static void virtio_pci_class_init(ObjectClass *klass, void *data)
1880{
1881 DeviceClass *dc = DEVICE_CLASS(klass);
1882 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1883 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
1884
1885 dc->props = virtio_pci_properties;
1886 k->realize = virtio_pci_realize;
1887 k->exit = virtio_pci_exit;
1888 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1889 k->revision = VIRTIO_PCI_ABI_VERSION;
1890 k->class_id = PCI_CLASS_OTHERS;
1891 device_class_set_parent_realize(dc, virtio_pci_dc_realize,
1892 &vpciklass->parent_dc_realize);
1893 dc->reset = virtio_pci_reset;
1894}
1895
1896static const TypeInfo virtio_pci_info = {
1897 .name = TYPE_VIRTIO_PCI,
1898 .parent = TYPE_PCI_DEVICE,
1899 .instance_size = sizeof(VirtIOPCIProxy),
1900 .class_init = virtio_pci_class_init,
1901 .class_size = sizeof(VirtioPCIClass),
1902 .abstract = true,
1903};
1904
1905static Property virtio_pci_generic_properties[] = {
1906 DEFINE_PROP_ON_OFF_AUTO("disable-legacy", VirtIOPCIProxy, disable_legacy,
1907 ON_OFF_AUTO_AUTO),
1908 DEFINE_PROP_BOOL("disable-modern", VirtIOPCIProxy, disable_modern, false),
1909 DEFINE_PROP_END_OF_LIST(),
1910};
1911
1912static void virtio_pci_base_class_init(ObjectClass *klass, void *data)
1913{
1914 const VirtioPCIDeviceTypeInfo *t = data;
1915 if (t->class_init) {
1916 t->class_init(klass, NULL);
1917 }
1918}
1919
1920static void virtio_pci_generic_class_init(ObjectClass *klass, void *data)
1921{
1922 DeviceClass *dc = DEVICE_CLASS(klass);
1923
1924 dc->props = virtio_pci_generic_properties;
1925}
1926
1927static void virtio_pci_transitional_instance_init(Object *obj)
1928{
1929 VirtIOPCIProxy *proxy = VIRTIO_PCI(obj);
1930
1931 proxy->disable_legacy = ON_OFF_AUTO_OFF;
1932 proxy->disable_modern = false;
1933}
1934
1935static void virtio_pci_non_transitional_instance_init(Object *obj)
1936{
1937 VirtIOPCIProxy *proxy = VIRTIO_PCI(obj);
1938
1939 proxy->disable_legacy = ON_OFF_AUTO_ON;
1940 proxy->disable_modern = false;
1941}
1942
1943void virtio_pci_types_register(const VirtioPCIDeviceTypeInfo *t)
1944{
1945 char *base_name = NULL;
1946 TypeInfo base_type_info = {
1947 .name = t->base_name,
1948 .parent = t->parent ? t->parent : TYPE_VIRTIO_PCI,
1949 .instance_size = t->instance_size,
1950 .instance_init = t->instance_init,
1951 .class_size = t->class_size,
1952 .abstract = true,
1953 .interfaces = t->interfaces,
1954 };
1955 TypeInfo generic_type_info = {
1956 .name = t->generic_name,
1957 .parent = base_type_info.name,
1958 .class_init = virtio_pci_generic_class_init,
1959 .interfaces = (InterfaceInfo[]) {
1960 { INTERFACE_PCIE_DEVICE },
1961 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
1962 { }
1963 },
1964 };
1965
1966 if (!base_type_info.name) {
1967
1968
1969 base_name = g_strdup_printf("%s-base-type", t->generic_name);
1970 base_type_info.name = base_name;
1971 base_type_info.class_init = virtio_pci_generic_class_init;
1972
1973 generic_type_info.parent = base_name;
1974 generic_type_info.class_init = virtio_pci_base_class_init;
1975 generic_type_info.class_data = (void *)t;
1976
1977 assert(!t->non_transitional_name);
1978 assert(!t->transitional_name);
1979 } else {
1980 base_type_info.class_init = virtio_pci_base_class_init;
1981 base_type_info.class_data = (void *)t;
1982 }
1983
1984 type_register(&base_type_info);
1985 if (generic_type_info.name) {
1986 type_register(&generic_type_info);
1987 }
1988
1989 if (t->non_transitional_name) {
1990 const TypeInfo non_transitional_type_info = {
1991 .name = t->non_transitional_name,
1992 .parent = base_type_info.name,
1993 .instance_init = virtio_pci_non_transitional_instance_init,
1994 .interfaces = (InterfaceInfo[]) {
1995 { INTERFACE_PCIE_DEVICE },
1996 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
1997 { }
1998 },
1999 };
2000 type_register(&non_transitional_type_info);
2001 }
2002
2003 if (t->transitional_name) {
2004 const TypeInfo transitional_type_info = {
2005 .name = t->transitional_name,
2006 .parent = base_type_info.name,
2007 .instance_init = virtio_pci_transitional_instance_init,
2008 .interfaces = (InterfaceInfo[]) {
2009
2010
2011
2012
2013 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
2014 { }
2015 },
2016 };
2017 type_register(&transitional_type_info);
2018 }
2019 g_free(base_name);
2020}
2021
2022
2023
2024static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
2025 VirtIOPCIProxy *dev)
2026{
2027 DeviceState *qdev = DEVICE(dev);
2028 char virtio_bus_name[] = "virtio-bus";
2029
2030 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_PCI_BUS, qdev,
2031 virtio_bus_name);
2032}
2033
2034static void virtio_pci_bus_class_init(ObjectClass *klass, void *data)
2035{
2036 BusClass *bus_class = BUS_CLASS(klass);
2037 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
2038 bus_class->max_dev = 1;
2039 k->notify = virtio_pci_notify;
2040 k->save_config = virtio_pci_save_config;
2041 k->load_config = virtio_pci_load_config;
2042 k->save_queue = virtio_pci_save_queue;
2043 k->load_queue = virtio_pci_load_queue;
2044 k->save_extra_state = virtio_pci_save_extra_state;
2045 k->load_extra_state = virtio_pci_load_extra_state;
2046 k->has_extra_state = virtio_pci_has_extra_state;
2047 k->query_guest_notifiers = virtio_pci_query_guest_notifiers;
2048 k->set_guest_notifiers = virtio_pci_set_guest_notifiers;
2049 k->set_host_notifier_mr = virtio_pci_set_host_notifier_mr;
2050 k->vmstate_change = virtio_pci_vmstate_change;
2051 k->pre_plugged = virtio_pci_pre_plugged;
2052 k->device_plugged = virtio_pci_device_plugged;
2053 k->device_unplugged = virtio_pci_device_unplugged;
2054 k->query_nvectors = virtio_pci_query_nvectors;
2055 k->ioeventfd_enabled = virtio_pci_ioeventfd_enabled;
2056 k->ioeventfd_assign = virtio_pci_ioeventfd_assign;
2057 k->get_dma_as = virtio_pci_get_dma_as;
2058}
2059
2060static const TypeInfo virtio_pci_bus_info = {
2061 .name = TYPE_VIRTIO_PCI_BUS,
2062 .parent = TYPE_VIRTIO_BUS,
2063 .instance_size = sizeof(VirtioPCIBusState),
2064 .class_init = virtio_pci_bus_class_init,
2065};
2066
2067static void virtio_pci_register_types(void)
2068{
2069
2070 type_register_static(&virtio_pci_bus_info);
2071 type_register_static(&virtio_pci_info);
2072}
2073
2074type_init(virtio_pci_register_types)
2075
2076
