4 * Copyright IBM, Corp. 2007
5 * Copyright (c) 2009 CodeSourcery
8 * Anthony Liguori <aliguori@us.ibm.com>
9 * Paul Brook <paul@codesourcery.com>
11 * This work is licensed under the terms of the GNU GPL, version 2. See
12 * the COPYING file in the top-level directory.
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.
20 #include "hw/virtio/virtio.h"
21 #include "hw/virtio/virtio-blk.h"
22 #include "hw/virtio/virtio-net.h"
23 #include "hw/virtio/virtio-serial.h"
24 #include "hw/virtio/virtio-scsi.h"
25 #include "hw/virtio/virtio-balloon.h"
26 #include "hw/pci/pci.h"
27 #include "qemu/error-report.h"
28 #include "hw/pci/msi.h"
29 #include "hw/pci/msix.h"
30 #include "hw/loader.h"
31 #include "sysemu/kvm.h"
32 #include "sysemu/blockdev.h"
33 #include "virtio-pci.h"
34 #include "qemu/range.h"
35 #include "hw/virtio/virtio-bus.h"
36 #include "qapi/visitor.h"
38 /* from Linux's linux/virtio_pci.h */
40 /* A 32-bit r/o bitmask of the features supported by the host */
41 #define VIRTIO_PCI_HOST_FEATURES 0
43 /* A 32-bit r/w bitmask of features activated by the guest */
44 #define VIRTIO_PCI_GUEST_FEATURES 4
46 /* A 32-bit r/w PFN for the currently selected queue */
47 #define VIRTIO_PCI_QUEUE_PFN 8
49 /* A 16-bit r/o queue size for the currently selected queue */
50 #define VIRTIO_PCI_QUEUE_NUM 12
52 /* A 16-bit r/w queue selector */
53 #define VIRTIO_PCI_QUEUE_SEL 14
55 /* A 16-bit r/w queue notifier */
56 #define VIRTIO_PCI_QUEUE_NOTIFY 16
58 /* An 8-bit device status register. */
59 #define VIRTIO_PCI_STATUS 18
61 /* An 8-bit r/o interrupt status register. Reading the value will return the
62 * current contents of the ISR and will also clear it. This is effectively
63 * a read-and-acknowledge. */
64 #define VIRTIO_PCI_ISR 19
66 /* MSI-X registers: only enabled if MSI-X is enabled. */
67 /* A 16-bit vector for configuration changes. */
68 #define VIRTIO_MSI_CONFIG_VECTOR 20
69 /* A 16-bit vector for selected queue notifications. */
70 #define VIRTIO_MSI_QUEUE_VECTOR 22
72 /* Config space size */
73 #define VIRTIO_PCI_CONFIG_NOMSI 20
74 #define VIRTIO_PCI_CONFIG_MSI 24
75 #define VIRTIO_PCI_REGION_SIZE(dev) (msix_present(dev) ? \
76 VIRTIO_PCI_CONFIG_MSI : \
77 VIRTIO_PCI_CONFIG_NOMSI)
79 /* The remaining space is defined by each driver as the per-driver
80 * configuration space */
81 #define VIRTIO_PCI_CONFIG(dev) (msix_enabled(dev) ? \
82 VIRTIO_PCI_CONFIG_MSI : \
83 VIRTIO_PCI_CONFIG_NOMSI)
85 /* How many bits to shift physical queue address written to QUEUE_PFN.
86 * 12 is historical, and due to x86 page size. */
87 #define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12
89 /* Flags track per-device state like workarounds for quirks in older guests. */
90 #define VIRTIO_PCI_FLAG_BUS_MASTER_BUG (1 << 0)
92 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
96 /* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */
97 static inline VirtIOPCIProxy *to_virtio_pci_proxy(DeviceState *d)
99 return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
102 /* DeviceState to VirtIOPCIProxy. Note: used on datapath,
103 * be careful and test performance if you change this.
105 static inline VirtIOPCIProxy *to_virtio_pci_proxy_fast(DeviceState *d)
107 return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
110 static void virtio_pci_notify(DeviceState *d, uint16_t vector)
112 VirtIOPCIProxy *proxy = to_virtio_pci_proxy_fast(d);
114 if (msix_enabled(&proxy->pci_dev))
115 msix_notify(&proxy->pci_dev, vector);
117 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
118 pci_set_irq(&proxy->pci_dev, vdev->isr & 1);
122 static void virtio_pci_save_config(DeviceState *d, QEMUFile *f)
124 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
125 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
127 pci_device_save(&proxy->pci_dev, f);
128 msix_save(&proxy->pci_dev, f);
129 if (msix_present(&proxy->pci_dev))
130 qemu_put_be16(f, vdev->config_vector);
133 static void virtio_pci_save_queue(DeviceState *d, int n, QEMUFile *f)
135 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
136 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
138 if (msix_present(&proxy->pci_dev))
139 qemu_put_be16(f, virtio_queue_vector(vdev, n));
142 static int virtio_pci_load_config(DeviceState *d, QEMUFile *f)
144 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
145 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
148 ret = pci_device_load(&proxy->pci_dev, f);
152 msix_unuse_all_vectors(&proxy->pci_dev);
153 msix_load(&proxy->pci_dev, f);
154 if (msix_present(&proxy->pci_dev)) {
155 qemu_get_be16s(f, &vdev->config_vector);
157 vdev->config_vector = VIRTIO_NO_VECTOR;
159 if (vdev->config_vector != VIRTIO_NO_VECTOR) {
160 return msix_vector_use(&proxy->pci_dev, vdev->config_vector);
165 static int virtio_pci_load_queue(DeviceState *d, int n, QEMUFile *f)
167 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
168 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
171 if (msix_present(&proxy->pci_dev)) {
172 qemu_get_be16s(f, &vector);
174 vector = VIRTIO_NO_VECTOR;
176 virtio_queue_set_vector(vdev, n, vector);
177 if (vector != VIRTIO_NO_VECTOR) {
178 return msix_vector_use(&proxy->pci_dev, vector);
183 static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy,
184 int n, bool assign, bool set_handler)
186 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
187 VirtQueue *vq = virtio_get_queue(vdev, n);
188 EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
192 r = event_notifier_init(notifier, 1);
194 error_report("%s: unable to init event notifier: %d",
198 virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler);
199 memory_region_add_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
202 memory_region_del_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
204 virtio_queue_set_host_notifier_fd_handler(vq, false, false);
205 event_notifier_cleanup(notifier);
210 static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy)
212 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
215 if (!(proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) ||
216 proxy->ioeventfd_disabled ||
217 proxy->ioeventfd_started) {
221 for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
222 if (!virtio_queue_get_num(vdev, n)) {
226 r = virtio_pci_set_host_notifier_internal(proxy, n, true, true);
231 proxy->ioeventfd_started = true;
236 if (!virtio_queue_get_num(vdev, n)) {
240 r = virtio_pci_set_host_notifier_internal(proxy, n, false, false);
243 proxy->ioeventfd_started = false;
244 error_report("%s: failed. Fallback to a userspace (slower).", __func__);
247 static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy)
249 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
253 if (!proxy->ioeventfd_started) {
257 for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
258 if (!virtio_queue_get_num(vdev, n)) {
262 r = virtio_pci_set_host_notifier_internal(proxy, n, false, false);
265 proxy->ioeventfd_started = false;
268 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
270 VirtIOPCIProxy *proxy = opaque;
271 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
275 case VIRTIO_PCI_GUEST_FEATURES:
276 /* Guest does not negotiate properly? We have to assume nothing. */
277 if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
278 val = virtio_bus_get_vdev_bad_features(&proxy->bus);
280 virtio_set_features(vdev, val);
282 case VIRTIO_PCI_QUEUE_PFN:
283 pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
285 virtio_pci_stop_ioeventfd(proxy);
287 msix_unuse_all_vectors(&proxy->pci_dev);
290 virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
292 case VIRTIO_PCI_QUEUE_SEL:
293 if (val < VIRTIO_PCI_QUEUE_MAX)
294 vdev->queue_sel = val;
296 case VIRTIO_PCI_QUEUE_NOTIFY:
297 if (val < VIRTIO_PCI_QUEUE_MAX) {
298 virtio_queue_notify(vdev, val);
301 case VIRTIO_PCI_STATUS:
302 if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
303 virtio_pci_stop_ioeventfd(proxy);
306 virtio_set_status(vdev, val & 0xFF);
308 if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
309 virtio_pci_start_ioeventfd(proxy);
312 if (vdev->status == 0) {
314 msix_unuse_all_vectors(&proxy->pci_dev);
317 /* Linux before 2.6.34 sets the device as OK without enabling
318 the PCI device bus master bit. In this case we need to disable
319 some safety checks. */
320 if ((val & VIRTIO_CONFIG_S_DRIVER_OK) &&
321 !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
322 proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
325 case VIRTIO_MSI_CONFIG_VECTOR:
326 msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
327 /* Make it possible for guest to discover an error took place. */
328 if (msix_vector_use(&proxy->pci_dev, val) < 0)
329 val = VIRTIO_NO_VECTOR;
330 vdev->config_vector = val;
332 case VIRTIO_MSI_QUEUE_VECTOR:
333 msix_vector_unuse(&proxy->pci_dev,
334 virtio_queue_vector(vdev, vdev->queue_sel));
335 /* Make it possible for guest to discover an error took place. */
336 if (msix_vector_use(&proxy->pci_dev, val) < 0)
337 val = VIRTIO_NO_VECTOR;
338 virtio_queue_set_vector(vdev, vdev->queue_sel, val);
341 error_report("%s: unexpected address 0x%x value 0x%x",
342 __func__, addr, val);
347 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
349 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
350 uint32_t ret = 0xFFFFFFFF;
353 case VIRTIO_PCI_HOST_FEATURES:
354 ret = proxy->host_features;
356 case VIRTIO_PCI_GUEST_FEATURES:
357 ret = vdev->guest_features;
359 case VIRTIO_PCI_QUEUE_PFN:
360 ret = virtio_queue_get_addr(vdev, vdev->queue_sel)
361 >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
363 case VIRTIO_PCI_QUEUE_NUM:
364 ret = virtio_queue_get_num(vdev, vdev->queue_sel);
366 case VIRTIO_PCI_QUEUE_SEL:
367 ret = vdev->queue_sel;
369 case VIRTIO_PCI_STATUS:
373 /* reading from the ISR also clears it. */
376 pci_irq_deassert(&proxy->pci_dev);
378 case VIRTIO_MSI_CONFIG_VECTOR:
379 ret = vdev->config_vector;
381 case VIRTIO_MSI_QUEUE_VECTOR:
382 ret = virtio_queue_vector(vdev, vdev->queue_sel);
391 static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr,
394 VirtIOPCIProxy *proxy = opaque;
395 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
396 uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
399 return virtio_ioport_read(proxy, addr);
405 val = virtio_config_readb(vdev, addr);
408 val = virtio_config_readw(vdev, addr);
409 if (virtio_is_big_endian(vdev)) {
414 val = virtio_config_readl(vdev, addr);
415 if (virtio_is_big_endian(vdev)) {
423 static void virtio_pci_config_write(void *opaque, hwaddr addr,
424 uint64_t val, unsigned size)
426 VirtIOPCIProxy *proxy = opaque;
427 uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
428 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
430 virtio_ioport_write(proxy, addr, val);
435 * Virtio-PCI is odd. Ioports are LE but config space is target native
440 virtio_config_writeb(vdev, addr, val);
443 if (virtio_is_big_endian(vdev)) {
446 virtio_config_writew(vdev, addr, val);
449 if (virtio_is_big_endian(vdev)) {
452 virtio_config_writel(vdev, addr, val);
457 static const MemoryRegionOps virtio_pci_config_ops = {
458 .read = virtio_pci_config_read,
459 .write = virtio_pci_config_write,
461 .min_access_size = 1,
462 .max_access_size = 4,
464 .endianness = DEVICE_LITTLE_ENDIAN,
467 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
468 uint32_t val, int len)
470 VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
471 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
473 pci_default_write_config(pci_dev, address, val, len);
475 if (range_covers_byte(address, len, PCI_COMMAND) &&
476 !(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) &&
477 !(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) {
478 virtio_pci_stop_ioeventfd(proxy);
479 virtio_set_status(vdev, vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
483 static unsigned virtio_pci_get_features(DeviceState *d)
485 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
486 return proxy->host_features;
489 static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy,
490 unsigned int queue_no,
494 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
497 if (irqfd->users == 0) {
498 ret = kvm_irqchip_add_msi_route(kvm_state, msg);
508 static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy,
511 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
512 if (--irqfd->users == 0) {
513 kvm_irqchip_release_virq(kvm_state, irqfd->virq);
517 static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy,
518 unsigned int queue_no,
521 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
522 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
523 VirtQueue *vq = virtio_get_queue(vdev, queue_no);
524 EventNotifier *n = virtio_queue_get_guest_notifier(vq);
526 ret = kvm_irqchip_add_irqfd_notifier(kvm_state, n, NULL, irqfd->virq);
530 static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy,
531 unsigned int queue_no,
534 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
535 VirtQueue *vq = virtio_get_queue(vdev, queue_no);
536 EventNotifier *n = virtio_queue_get_guest_notifier(vq);
537 VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
540 ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, n, irqfd->virq);
544 static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
546 PCIDevice *dev = &proxy->pci_dev;
547 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
548 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
553 for (queue_no = 0; queue_no < nvqs; queue_no++) {
554 if (!virtio_queue_get_num(vdev, queue_no)) {
557 vector = virtio_queue_vector(vdev, queue_no);
558 if (vector >= msix_nr_vectors_allocated(dev)) {
561 msg = msix_get_message(dev, vector);
562 ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector, msg);
566 /* If guest supports masking, set up irqfd now.
567 * Otherwise, delay until unmasked in the frontend.
569 if (k->guest_notifier_mask) {
570 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
572 kvm_virtio_pci_vq_vector_release(proxy, vector);
580 while (--queue_no >= 0) {
581 vector = virtio_queue_vector(vdev, queue_no);
582 if (vector >= msix_nr_vectors_allocated(dev)) {
585 if (k->guest_notifier_mask) {
586 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
588 kvm_virtio_pci_vq_vector_release(proxy, vector);
593 static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
595 PCIDevice *dev = &proxy->pci_dev;
596 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
599 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
601 for (queue_no = 0; queue_no < nvqs; queue_no++) {
602 if (!virtio_queue_get_num(vdev, queue_no)) {
605 vector = virtio_queue_vector(vdev, queue_no);
606 if (vector >= msix_nr_vectors_allocated(dev)) {
609 /* If guest supports masking, clean up irqfd now.
610 * Otherwise, it was cleaned when masked in the frontend.
612 if (k->guest_notifier_mask) {
613 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
615 kvm_virtio_pci_vq_vector_release(proxy, vector);
619 static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy,
620 unsigned int queue_no,
624 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
625 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
626 VirtQueue *vq = virtio_get_queue(vdev, queue_no);
627 EventNotifier *n = virtio_queue_get_guest_notifier(vq);
631 if (proxy->vector_irqfd) {
632 irqfd = &proxy->vector_irqfd[vector];
633 if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) {
634 ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg);
641 /* If guest supports masking, irqfd is already setup, unmask it.
642 * Otherwise, set it up now.
644 if (k->guest_notifier_mask) {
645 k->guest_notifier_mask(vdev, queue_no, false);
646 /* Test after unmasking to avoid losing events. */
647 if (k->guest_notifier_pending &&
648 k->guest_notifier_pending(vdev, queue_no)) {
649 event_notifier_set(n);
652 ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
657 static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy,
658 unsigned int queue_no,
661 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
662 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
664 /* If guest supports masking, keep irqfd but mask it.
665 * Otherwise, clean it up now.
667 if (k->guest_notifier_mask) {
668 k->guest_notifier_mask(vdev, queue_no, true);
670 kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
674 static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector,
677 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
678 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
681 for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
682 if (!virtio_queue_get_num(vdev, queue_no)) {
685 if (virtio_queue_vector(vdev, queue_no) != vector) {
688 ret = virtio_pci_vq_vector_unmask(proxy, queue_no, vector, msg);
696 while (--queue_no >= 0) {
697 if (virtio_queue_vector(vdev, queue_no) != vector) {
700 virtio_pci_vq_vector_mask(proxy, queue_no, vector);
705 static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector)
707 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
708 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
711 for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
712 if (!virtio_queue_get_num(vdev, queue_no)) {
715 if (virtio_queue_vector(vdev, queue_no) != vector) {
718 virtio_pci_vq_vector_mask(proxy, queue_no, vector);
722 static void virtio_pci_vector_poll(PCIDevice *dev,
723 unsigned int vector_start,
724 unsigned int vector_end)
726 VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
727 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
728 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
731 EventNotifier *notifier;
734 for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
735 if (!virtio_queue_get_num(vdev, queue_no)) {
738 vector = virtio_queue_vector(vdev, queue_no);
739 if (vector < vector_start || vector >= vector_end ||
740 !msix_is_masked(dev, vector)) {
743 vq = virtio_get_queue(vdev, queue_no);
744 notifier = virtio_queue_get_guest_notifier(vq);
745 if (k->guest_notifier_pending) {
746 if (k->guest_notifier_pending(vdev, queue_no)) {
747 msix_set_pending(dev, vector);
749 } else if (event_notifier_test_and_clear(notifier)) {
750 msix_set_pending(dev, vector);
755 static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
758 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
759 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
760 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
761 VirtQueue *vq = virtio_get_queue(vdev, n);
762 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
765 int r = event_notifier_init(notifier, 0);
769 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
771 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
772 event_notifier_cleanup(notifier);
775 if (!msix_enabled(&proxy->pci_dev) && vdc->guest_notifier_mask) {
776 vdc->guest_notifier_mask(vdev, n, !assign);
782 static bool virtio_pci_query_guest_notifiers(DeviceState *d)
784 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
785 return msix_enabled(&proxy->pci_dev);
788 static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
790 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
791 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
792 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
794 bool with_irqfd = msix_enabled(&proxy->pci_dev) &&
795 kvm_msi_via_irqfd_enabled();
797 nvqs = MIN(nvqs, VIRTIO_PCI_QUEUE_MAX);
799 /* When deassigning, pass a consistent nvqs value
800 * to avoid leaking notifiers.
802 assert(assign || nvqs == proxy->nvqs_with_notifiers);
804 proxy->nvqs_with_notifiers = nvqs;
806 /* Must unset vector notifier while guest notifier is still assigned */
807 if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) {
808 msix_unset_vector_notifiers(&proxy->pci_dev);
809 if (proxy->vector_irqfd) {
810 kvm_virtio_pci_vector_release(proxy, nvqs);
811 g_free(proxy->vector_irqfd);
812 proxy->vector_irqfd = NULL;
816 for (n = 0; n < nvqs; n++) {
817 if (!virtio_queue_get_num(vdev, n)) {
821 r = virtio_pci_set_guest_notifier(d, n, assign, with_irqfd);
827 /* Must set vector notifier after guest notifier has been assigned */
828 if ((with_irqfd || k->guest_notifier_mask) && assign) {
830 proxy->vector_irqfd =
831 g_malloc0(sizeof(*proxy->vector_irqfd) *
832 msix_nr_vectors_allocated(&proxy->pci_dev));
833 r = kvm_virtio_pci_vector_use(proxy, nvqs);
838 r = msix_set_vector_notifiers(&proxy->pci_dev,
839 virtio_pci_vector_unmask,
840 virtio_pci_vector_mask,
841 virtio_pci_vector_poll);
843 goto notifiers_error;
852 kvm_virtio_pci_vector_release(proxy, nvqs);
856 /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
859 virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd);
864 static int virtio_pci_set_host_notifier(DeviceState *d, int n, bool assign)
866 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
868 /* Stop using ioeventfd for virtqueue kick if the device starts using host
869 * notifiers. This makes it easy to avoid stepping on each others' toes.
871 proxy->ioeventfd_disabled = assign;
873 virtio_pci_stop_ioeventfd(proxy);
875 /* We don't need to start here: it's not needed because backend
876 * currently only stops on status change away from ok,
877 * reset, vmstop and such. If we do add code to start here,
878 * need to check vmstate, device state etc. */
879 return virtio_pci_set_host_notifier_internal(proxy, n, assign, false);
882 static void virtio_pci_vmstate_change(DeviceState *d, bool running)
884 VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
885 VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
888 /* Try to find out if the guest has bus master disabled, but is
889 in ready state. Then we have a buggy guest OS. */
890 if ((vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
891 !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
892 proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
894 virtio_pci_start_ioeventfd(proxy);
896 virtio_pci_stop_ioeventfd(proxy);
901 static int virtio_9p_init_pci(VirtIOPCIProxy *vpci_dev)
903 V9fsPCIState *dev = VIRTIO_9P_PCI(vpci_dev);
904 DeviceState *vdev = DEVICE(&dev->vdev);
906 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
907 if (qdev_init(vdev) < 0) {
913 static Property virtio_9p_pci_properties[] = {
914 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
915 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
916 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
917 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
918 DEFINE_VIRTIO_9P_PROPERTIES(V9fsPCIState, vdev.fsconf),
919 DEFINE_PROP_END_OF_LIST(),
922 static void virtio_9p_pci_class_init(ObjectClass *klass, void *data)
924 DeviceClass *dc = DEVICE_CLASS(klass);
925 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
926 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
928 k->init = virtio_9p_init_pci;
929 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
930 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_9P;
931 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
932 pcidev_k->class_id = 0x2;
933 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
934 dc->props = virtio_9p_pci_properties;
937 static void virtio_9p_pci_instance_init(Object *obj)
939 V9fsPCIState *dev = VIRTIO_9P_PCI(obj);
940 object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_9P);
941 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
944 static const TypeInfo virtio_9p_pci_info = {
945 .name = TYPE_VIRTIO_9P_PCI,
946 .parent = TYPE_VIRTIO_PCI,
947 .instance_size = sizeof(V9fsPCIState),
948 .instance_init = virtio_9p_pci_instance_init,
949 .class_init = virtio_9p_pci_class_init,
951 #endif /* CONFIG_VIRTFS */
954 * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
957 /* This is called by virtio-bus just after the device is plugged. */
958 static void virtio_pci_device_plugged(DeviceState *d)
960 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
961 VirtioBusState *bus = &proxy->bus;
965 config = proxy->pci_dev.config;
966 if (proxy->class_code) {
967 pci_config_set_class(config, proxy->class_code);
969 pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID,
970 pci_get_word(config + PCI_VENDOR_ID));
971 pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus));
972 config[PCI_INTERRUPT_PIN] = 1;
974 if (proxy->nvectors &&
975 msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, 1)) {
976 error_report("unable to init msix vectors to %" PRIu32,
981 proxy->pci_dev.config_write = virtio_write_config;
983 size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev)
984 + virtio_bus_get_vdev_config_len(bus);
985 if (size & (size - 1)) {
986 size = 1 << qemu_fls(size);
989 memory_region_init_io(&proxy->bar, OBJECT(proxy), &virtio_pci_config_ops,
990 proxy, "virtio-pci", size);
991 pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
994 if (!kvm_has_many_ioeventfds()) {
995 proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
998 proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
999 proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
1000 proxy->host_features = virtio_bus_get_vdev_features(bus,
1001 proxy->host_features);
1004 static void virtio_pci_device_unplugged(DeviceState *d)
1006 PCIDevice *pci_dev = PCI_DEVICE(d);
1007 VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
1009 virtio_pci_stop_ioeventfd(proxy);
1010 msix_uninit_exclusive_bar(pci_dev);
1013 static int virtio_pci_init(PCIDevice *pci_dev)
1015 VirtIOPCIProxy *dev = VIRTIO_PCI(pci_dev);
1016 VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev);
1017 virtio_pci_bus_new(&dev->bus, sizeof(dev->bus), dev);
1018 if (k->init != NULL) {
1019 return k->init(dev);
1024 static void virtio_pci_exit(PCIDevice *pci_dev)
1026 VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
1027 memory_region_destroy(&proxy->bar);
1030 static void virtio_pci_reset(DeviceState *qdev)
1032 VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev);
1033 VirtioBusState *bus = VIRTIO_BUS(&proxy->bus);
1034 virtio_pci_stop_ioeventfd(proxy);
1035 virtio_bus_reset(bus);
1036 msix_unuse_all_vectors(&proxy->pci_dev);
1037 proxy->flags &= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
1040 static void virtio_pci_class_init(ObjectClass *klass, void *data)
1042 DeviceClass *dc = DEVICE_CLASS(klass);
1043 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1045 k->init = virtio_pci_init;
1046 k->exit = virtio_pci_exit;
1047 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1048 k->revision = VIRTIO_PCI_ABI_VERSION;
1049 k->class_id = PCI_CLASS_OTHERS;
1050 dc->reset = virtio_pci_reset;
1053 static const TypeInfo virtio_pci_info = {
1054 .name = TYPE_VIRTIO_PCI,
1055 .parent = TYPE_PCI_DEVICE,
1056 .instance_size = sizeof(VirtIOPCIProxy),
1057 .class_init = virtio_pci_class_init,
1058 .class_size = sizeof(VirtioPCIClass),
1062 /* virtio-blk-pci */
1064 static Property virtio_blk_pci_properties[] = {
1065 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
1066 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1067 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1068 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
1069 DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features),
1070 DEFINE_PROP_END_OF_LIST(),
1073 static int virtio_blk_pci_init(VirtIOPCIProxy *vpci_dev)
1075 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
1076 DeviceState *vdev = DEVICE(&dev->vdev);
1077 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1078 if (qdev_init(vdev) < 0) {
1084 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
1086 DeviceClass *dc = DEVICE_CLASS(klass);
1087 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1088 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1090 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1091 dc->props = virtio_blk_pci_properties;
1092 k->init = virtio_blk_pci_init;
1093 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1094 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
1095 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1096 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
1099 static void virtio_blk_pci_instance_init(Object *obj)
1101 VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
1102 object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BLK);
1103 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1104 object_unref(OBJECT(&dev->vdev));
1105 qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
1106 object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev),"iothread",
1110 static const TypeInfo virtio_blk_pci_info = {
1111 .name = TYPE_VIRTIO_BLK_PCI,
1112 .parent = TYPE_VIRTIO_PCI,
1113 .instance_size = sizeof(VirtIOBlkPCI),
1114 .instance_init = virtio_blk_pci_instance_init,
1115 .class_init = virtio_blk_pci_class_init,
1118 /* virtio-scsi-pci */
1120 static Property virtio_scsi_pci_properties[] = {
1121 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1122 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1123 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
1124 DEV_NVECTORS_UNSPECIFIED),
1125 DEFINE_VIRTIO_SCSI_FEATURES(VirtIOPCIProxy, host_features),
1126 DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSIPCI, vdev.parent_obj.conf),
1127 DEFINE_PROP_END_OF_LIST(),
1130 static int virtio_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev)
1132 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev);
1133 DeviceState *vdev = DEVICE(&dev->vdev);
1134 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
1135 DeviceState *proxy = DEVICE(vpci_dev);
1138 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
1139 vpci_dev->nvectors = vs->conf.num_queues + 3;
1143 * For command line compatibility, this sets the virtio-scsi-device bus
1147 bus_name = g_strdup_printf("%s.0", proxy->id);
1148 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
1152 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1153 if (qdev_init(vdev) < 0) {
1159 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data)
1161 DeviceClass *dc = DEVICE_CLASS(klass);
1162 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1163 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1164 k->init = virtio_scsi_pci_init_pci;
1165 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1166 dc->props = virtio_scsi_pci_properties;
1167 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1168 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
1169 pcidev_k->revision = 0x00;
1170 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
1173 static void virtio_scsi_pci_instance_init(Object *obj)
1175 VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
1176 object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SCSI);
1177 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1180 static const TypeInfo virtio_scsi_pci_info = {
1181 .name = TYPE_VIRTIO_SCSI_PCI,
1182 .parent = TYPE_VIRTIO_PCI,
1183 .instance_size = sizeof(VirtIOSCSIPCI),
1184 .instance_init = virtio_scsi_pci_instance_init,
1185 .class_init = virtio_scsi_pci_class_init,
1188 /* vhost-scsi-pci */
1190 #ifdef CONFIG_VHOST_SCSI
1191 static Property vhost_scsi_pci_properties[] = {
1192 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
1193 DEV_NVECTORS_UNSPECIFIED),
1194 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
1195 DEFINE_VHOST_SCSI_PROPERTIES(VHostSCSIPCI, vdev.parent_obj.conf),
1196 DEFINE_PROP_END_OF_LIST(),
1199 static int vhost_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev)
1201 VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev);
1202 DeviceState *vdev = DEVICE(&dev->vdev);
1203 VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
1205 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
1206 vpci_dev->nvectors = vs->conf.num_queues + 3;
1209 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1210 if (qdev_init(vdev) < 0) {
1216 static void vhost_scsi_pci_class_init(ObjectClass *klass, void *data)
1218 DeviceClass *dc = DEVICE_CLASS(klass);
1219 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1220 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1221 k->init = vhost_scsi_pci_init_pci;
1222 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
1223 dc->props = vhost_scsi_pci_properties;
1224 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1225 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
1226 pcidev_k->revision = 0x00;
1227 pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
1230 static void vhost_scsi_pci_instance_init(Object *obj)
1232 VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj);
1233 object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VHOST_SCSI);
1234 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1237 static const TypeInfo vhost_scsi_pci_info = {
1238 .name = TYPE_VHOST_SCSI_PCI,
1239 .parent = TYPE_VIRTIO_PCI,
1240 .instance_size = sizeof(VHostSCSIPCI),
1241 .instance_init = vhost_scsi_pci_instance_init,
1242 .class_init = vhost_scsi_pci_class_init,
1246 /* virtio-balloon-pci */
1248 static void balloon_pci_stats_get_all(Object *obj, struct Visitor *v,
1249 void *opaque, const char *name,
1252 VirtIOBalloonPCI *dev = opaque;
1253 object_property_get(OBJECT(&dev->vdev), v, "guest-stats", errp);
1256 static void balloon_pci_stats_get_poll_interval(Object *obj, struct Visitor *v,
1257 void *opaque, const char *name,
1260 VirtIOBalloonPCI *dev = opaque;
1261 object_property_get(OBJECT(&dev->vdev), v, "guest-stats-polling-interval",
1265 static void balloon_pci_stats_set_poll_interval(Object *obj, struct Visitor *v,
1266 void *opaque, const char *name,
1269 VirtIOBalloonPCI *dev = opaque;
1270 object_property_set(OBJECT(&dev->vdev), v, "guest-stats-polling-interval",
1274 static Property virtio_balloon_pci_properties[] = {
1275 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
1276 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
1277 DEFINE_PROP_END_OF_LIST(),
1280 static int virtio_balloon_pci_init(VirtIOPCIProxy *vpci_dev)
1282 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev);
1283 DeviceState *vdev = DEVICE(&dev->vdev);
1285 if (vpci_dev->class_code != PCI_CLASS_OTHERS &&
1286 vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */
1287 vpci_dev->class_code = PCI_CLASS_OTHERS;
1290 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1291 if (qdev_init(vdev) < 0) {
1297 static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data)
1299 DeviceClass *dc = DEVICE_CLASS(klass);
1300 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1301 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1302 k->init = virtio_balloon_pci_init;
1303 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1304 dc->props = virtio_balloon_pci_properties;
1305 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1306 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON;
1307 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1308 pcidev_k->class_id = PCI_CLASS_OTHERS;
1311 static void virtio_balloon_pci_instance_init(Object *obj)
1313 VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj);
1314 object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BALLOON);
1315 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1317 object_property_add(obj, "guest-stats", "guest statistics",
1318 balloon_pci_stats_get_all, NULL, NULL, dev,
1321 object_property_add(obj, "guest-stats-polling-interval", "int",
1322 balloon_pci_stats_get_poll_interval,
1323 balloon_pci_stats_set_poll_interval,
1327 static const TypeInfo virtio_balloon_pci_info = {
1328 .name = TYPE_VIRTIO_BALLOON_PCI,
1329 .parent = TYPE_VIRTIO_PCI,
1330 .instance_size = sizeof(VirtIOBalloonPCI),
1331 .instance_init = virtio_balloon_pci_instance_init,
1332 .class_init = virtio_balloon_pci_class_init,
1335 /* virtio-serial-pci */
1337 static int virtio_serial_pci_init(VirtIOPCIProxy *vpci_dev)
1339 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev);
1340 DeviceState *vdev = DEVICE(&dev->vdev);
1341 DeviceState *proxy = DEVICE(vpci_dev);
1344 if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
1345 vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
1346 vpci_dev->class_code != PCI_CLASS_OTHERS) { /* qemu-kvm */
1347 vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER;
1350 /* backwards-compatibility with machines that were created with
1351 DEV_NVECTORS_UNSPECIFIED */
1352 if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
1353 vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1;
1357 * For command line compatibility, this sets the virtio-serial-device bus
1361 bus_name = g_strdup_printf("%s.0", proxy->id);
1362 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
1366 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1367 if (qdev_init(vdev) < 0) {
1373 static Property virtio_serial_pci_properties[] = {
1374 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1375 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
1376 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
1377 DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
1378 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
1379 DEFINE_VIRTIO_SERIAL_PROPERTIES(VirtIOSerialPCI, vdev.serial),
1380 DEFINE_PROP_END_OF_LIST(),
1383 static void virtio_serial_pci_class_init(ObjectClass *klass, void *data)
1385 DeviceClass *dc = DEVICE_CLASS(klass);
1386 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1387 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1388 k->init = virtio_serial_pci_init;
1389 set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
1390 dc->props = virtio_serial_pci_properties;
1391 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1392 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE;
1393 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1394 pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
1397 static void virtio_serial_pci_instance_init(Object *obj)
1399 VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj);
1400 object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SERIAL);
1401 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1404 static const TypeInfo virtio_serial_pci_info = {
1405 .name = TYPE_VIRTIO_SERIAL_PCI,
1406 .parent = TYPE_VIRTIO_PCI,
1407 .instance_size = sizeof(VirtIOSerialPCI),
1408 .instance_init = virtio_serial_pci_instance_init,
1409 .class_init = virtio_serial_pci_class_init,
1412 /* virtio-net-pci */
1414 static Property virtio_net_properties[] = {
1415 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
1416 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false),
1417 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
1418 DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features),
1419 DEFINE_NIC_PROPERTIES(VirtIONetPCI, vdev.nic_conf),
1420 DEFINE_VIRTIO_NET_PROPERTIES(VirtIONetPCI, vdev.net_conf),
1421 DEFINE_PROP_END_OF_LIST(),
1424 static int virtio_net_pci_init(VirtIOPCIProxy *vpci_dev)
1426 DeviceState *qdev = DEVICE(vpci_dev);
1427 VirtIONetPCI *dev = VIRTIO_NET_PCI(vpci_dev);
1428 DeviceState *vdev = DEVICE(&dev->vdev);
1430 virtio_net_set_config_size(&dev->vdev, vpci_dev->host_features);
1431 virtio_net_set_netclient_name(&dev->vdev, qdev->id,
1432 object_get_typename(OBJECT(qdev)));
1433 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1434 if (qdev_init(vdev) < 0) {
1440 static void virtio_net_pci_class_init(ObjectClass *klass, void *data)
1442 DeviceClass *dc = DEVICE_CLASS(klass);
1443 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1444 VirtioPCIClass *vpciklass = VIRTIO_PCI_CLASS(klass);
1446 k->romfile = "efi-virtio.rom";
1447 k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1448 k->device_id = PCI_DEVICE_ID_VIRTIO_NET;
1449 k->revision = VIRTIO_PCI_ABI_VERSION;
1450 k->class_id = PCI_CLASS_NETWORK_ETHERNET;
1451 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
1452 dc->props = virtio_net_properties;
1453 vpciklass->init = virtio_net_pci_init;
1456 static void virtio_net_pci_instance_init(Object *obj)
1458 VirtIONetPCI *dev = VIRTIO_NET_PCI(obj);
1459 object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_NET);
1460 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1463 static const TypeInfo virtio_net_pci_info = {
1464 .name = TYPE_VIRTIO_NET_PCI,
1465 .parent = TYPE_VIRTIO_PCI,
1466 .instance_size = sizeof(VirtIONetPCI),
1467 .instance_init = virtio_net_pci_instance_init,
1468 .class_init = virtio_net_pci_class_init,
1471 /* virtio-rng-pci */
1473 static Property virtio_rng_pci_properties[] = {
1474 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
1475 DEFINE_VIRTIO_RNG_PROPERTIES(VirtIORngPCI, vdev.conf),
1476 DEFINE_PROP_END_OF_LIST(),
1479 static int virtio_rng_pci_init(VirtIOPCIProxy *vpci_dev)
1481 VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev);
1482 DeviceState *vdev = DEVICE(&vrng->vdev);
1484 qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
1485 if (qdev_init(vdev) < 0) {
1489 object_property_set_link(OBJECT(vrng),
1490 OBJECT(vrng->vdev.conf.rng), "rng",
1496 static void virtio_rng_pci_class_init(ObjectClass *klass, void *data)
1498 DeviceClass *dc = DEVICE_CLASS(klass);
1499 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
1500 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
1502 k->init = virtio_rng_pci_init;
1503 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1504 dc->props = virtio_rng_pci_properties;
1506 pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
1507 pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG;
1508 pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
1509 pcidev_k->class_id = PCI_CLASS_OTHERS;
1512 static void virtio_rng_initfn(Object *obj)
1514 VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj);
1515 object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_RNG);
1516 object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
1517 object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
1518 (Object **)&dev->vdev.conf.rng,
1519 qdev_prop_allow_set_link_before_realize,
1520 OBJ_PROP_LINK_UNREF_ON_RELEASE, NULL);
1524 static const TypeInfo virtio_rng_pci_info = {
1525 .name = TYPE_VIRTIO_RNG_PCI,
1526 .parent = TYPE_VIRTIO_PCI,
1527 .instance_size = sizeof(VirtIORngPCI),
1528 .instance_init = virtio_rng_initfn,
1529 .class_init = virtio_rng_pci_class_init,
1532 /* virtio-pci-bus */
1534 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
1535 VirtIOPCIProxy *dev)
1537 DeviceState *qdev = DEVICE(dev);
1539 char virtio_bus_name[] = "virtio-bus";
1541 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_PCI_BUS, qdev,
1544 qbus->allow_hotplug = 1;
1547 static void virtio_pci_bus_class_init(ObjectClass *klass, void *data)
1549 BusClass *bus_class = BUS_CLASS(klass);
1550 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
1551 bus_class->max_dev = 1;
1552 k->notify = virtio_pci_notify;
1553 k->save_config = virtio_pci_save_config;
1554 k->load_config = virtio_pci_load_config;
1555 k->save_queue = virtio_pci_save_queue;
1556 k->load_queue = virtio_pci_load_queue;
1557 k->get_features = virtio_pci_get_features;
1558 k->query_guest_notifiers = virtio_pci_query_guest_notifiers;
1559 k->set_host_notifier = virtio_pci_set_host_notifier;
1560 k->set_guest_notifiers = virtio_pci_set_guest_notifiers;
1561 k->vmstate_change = virtio_pci_vmstate_change;
1562 k->device_plugged = virtio_pci_device_plugged;
1563 k->device_unplugged = virtio_pci_device_unplugged;
1566 static const TypeInfo virtio_pci_bus_info = {
1567 .name = TYPE_VIRTIO_PCI_BUS,
1568 .parent = TYPE_VIRTIO_BUS,
1569 .instance_size = sizeof(VirtioPCIBusState),
1570 .class_init = virtio_pci_bus_class_init,
1573 static void virtio_pci_register_types(void)
1575 type_register_static(&virtio_rng_pci_info);
1576 type_register_static(&virtio_pci_bus_info);
1577 type_register_static(&virtio_pci_info);
1578 #ifdef CONFIG_VIRTFS
1579 type_register_static(&virtio_9p_pci_info);
1581 type_register_static(&virtio_blk_pci_info);
1582 type_register_static(&virtio_scsi_pci_info);
1583 type_register_static(&virtio_balloon_pci_info);
1584 type_register_static(&virtio_serial_pci_info);
1585 type_register_static(&virtio_net_pci_info);
1586 #ifdef CONFIG_VHOST_SCSI
1587 type_register_static(&vhost_scsi_pci_info);
1591 type_init(virtio_pci_register_types)