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/block-backend.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 static void virtio_pci_bus_new(VirtioBusState
*bus
, size_t bus_size
,
93 /* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */
94 static inline VirtIOPCIProxy
*to_virtio_pci_proxy(DeviceState
*d
)
96 return container_of(d
, VirtIOPCIProxy
, pci_dev
.qdev
);
99 /* DeviceState to VirtIOPCIProxy. Note: used on datapath,
100 * be careful and test performance if you change this.
102 static inline VirtIOPCIProxy
*to_virtio_pci_proxy_fast(DeviceState
*d
)
104 return container_of(d
, VirtIOPCIProxy
, pci_dev
.qdev
);
107 static void virtio_pci_notify(DeviceState
*d
, uint16_t vector
)
109 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy_fast(d
);
111 if (msix_enabled(&proxy
->pci_dev
))
112 msix_notify(&proxy
->pci_dev
, vector
);
114 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
115 pci_set_irq(&proxy
->pci_dev
, vdev
->isr
& 1);
119 static void virtio_pci_save_config(DeviceState
*d
, QEMUFile
*f
)
121 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
122 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
124 pci_device_save(&proxy
->pci_dev
, f
);
125 msix_save(&proxy
->pci_dev
, f
);
126 if (msix_present(&proxy
->pci_dev
))
127 qemu_put_be16(f
, vdev
->config_vector
);
130 static void virtio_pci_save_queue(DeviceState
*d
, int n
, QEMUFile
*f
)
132 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
133 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
135 if (msix_present(&proxy
->pci_dev
))
136 qemu_put_be16(f
, virtio_queue_vector(vdev
, n
));
139 static int virtio_pci_load_config(DeviceState
*d
, QEMUFile
*f
)
141 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
142 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
145 ret
= pci_device_load(&proxy
->pci_dev
, f
);
149 msix_unuse_all_vectors(&proxy
->pci_dev
);
150 msix_load(&proxy
->pci_dev
, f
);
151 if (msix_present(&proxy
->pci_dev
)) {
152 qemu_get_be16s(f
, &vdev
->config_vector
);
154 vdev
->config_vector
= VIRTIO_NO_VECTOR
;
156 if (vdev
->config_vector
!= VIRTIO_NO_VECTOR
) {
157 return msix_vector_use(&proxy
->pci_dev
, vdev
->config_vector
);
162 static int virtio_pci_load_queue(DeviceState
*d
, int n
, QEMUFile
*f
)
164 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
165 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
168 if (msix_present(&proxy
->pci_dev
)) {
169 qemu_get_be16s(f
, &vector
);
171 vector
= VIRTIO_NO_VECTOR
;
173 virtio_queue_set_vector(vdev
, n
, vector
);
174 if (vector
!= VIRTIO_NO_VECTOR
) {
175 return msix_vector_use(&proxy
->pci_dev
, vector
);
180 static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy
*proxy
,
181 int n
, bool assign
, bool set_handler
)
183 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
184 VirtQueue
*vq
= virtio_get_queue(vdev
, n
);
185 EventNotifier
*notifier
= virtio_queue_get_host_notifier(vq
);
189 r
= event_notifier_init(notifier
, 1);
191 error_report("%s: unable to init event notifier: %d",
195 virtio_queue_set_host_notifier_fd_handler(vq
, true, set_handler
);
196 memory_region_add_eventfd(&proxy
->bar
, VIRTIO_PCI_QUEUE_NOTIFY
, 2,
199 memory_region_del_eventfd(&proxy
->bar
, VIRTIO_PCI_QUEUE_NOTIFY
, 2,
201 virtio_queue_set_host_notifier_fd_handler(vq
, false, false);
202 event_notifier_cleanup(notifier
);
207 static void virtio_pci_start_ioeventfd(VirtIOPCIProxy
*proxy
)
209 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
212 if (!(proxy
->flags
& VIRTIO_PCI_FLAG_USE_IOEVENTFD
) ||
213 proxy
->ioeventfd_disabled
||
214 proxy
->ioeventfd_started
) {
218 for (n
= 0; n
< VIRTIO_PCI_QUEUE_MAX
; n
++) {
219 if (!virtio_queue_get_num(vdev
, n
)) {
223 r
= virtio_pci_set_host_notifier_internal(proxy
, n
, true, true);
228 proxy
->ioeventfd_started
= true;
233 if (!virtio_queue_get_num(vdev
, n
)) {
237 r
= virtio_pci_set_host_notifier_internal(proxy
, n
, false, false);
240 proxy
->ioeventfd_started
= false;
241 error_report("%s: failed. Fallback to a userspace (slower).", __func__
);
244 static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy
*proxy
)
246 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
250 if (!proxy
->ioeventfd_started
) {
254 for (n
= 0; n
< VIRTIO_PCI_QUEUE_MAX
; n
++) {
255 if (!virtio_queue_get_num(vdev
, n
)) {
259 r
= virtio_pci_set_host_notifier_internal(proxy
, n
, false, false);
262 proxy
->ioeventfd_started
= false;
265 static void virtio_ioport_write(void *opaque
, uint32_t addr
, uint32_t val
)
267 VirtIOPCIProxy
*proxy
= opaque
;
268 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
272 case VIRTIO_PCI_GUEST_FEATURES
:
273 /* Guest does not negotiate properly? We have to assume nothing. */
274 if (val
& (1 << VIRTIO_F_BAD_FEATURE
)) {
275 val
= virtio_bus_get_vdev_bad_features(&proxy
->bus
);
277 virtio_set_features(vdev
, val
);
279 case VIRTIO_PCI_QUEUE_PFN
:
280 pa
= (hwaddr
)val
<< VIRTIO_PCI_QUEUE_ADDR_SHIFT
;
282 virtio_pci_stop_ioeventfd(proxy
);
284 msix_unuse_all_vectors(&proxy
->pci_dev
);
287 virtio_queue_set_addr(vdev
, vdev
->queue_sel
, pa
);
289 case VIRTIO_PCI_QUEUE_SEL
:
290 if (val
< VIRTIO_PCI_QUEUE_MAX
)
291 vdev
->queue_sel
= val
;
293 case VIRTIO_PCI_QUEUE_NOTIFY
:
294 if (val
< VIRTIO_PCI_QUEUE_MAX
) {
295 virtio_queue_notify(vdev
, val
);
298 case VIRTIO_PCI_STATUS
:
299 if (!(val
& VIRTIO_CONFIG_S_DRIVER_OK
)) {
300 virtio_pci_stop_ioeventfd(proxy
);
303 virtio_set_status(vdev
, val
& 0xFF);
305 if (val
& VIRTIO_CONFIG_S_DRIVER_OK
) {
306 virtio_pci_start_ioeventfd(proxy
);
309 if (vdev
->status
== 0) {
311 msix_unuse_all_vectors(&proxy
->pci_dev
);
314 /* Linux before 2.6.34 drives the device without enabling
315 the PCI device bus master bit. Enable it automatically
316 for the guest. This is a PCI spec violation but so is
317 initiating DMA with bus master bit clear. */
318 if (val
== (VIRTIO_CONFIG_S_ACKNOWLEDGE
| VIRTIO_CONFIG_S_DRIVER
)) {
319 pci_default_write_config(&proxy
->pci_dev
, PCI_COMMAND
,
320 proxy
->pci_dev
.config
[PCI_COMMAND
] |
321 PCI_COMMAND_MASTER
, 1);
324 case VIRTIO_MSI_CONFIG_VECTOR
:
325 msix_vector_unuse(&proxy
->pci_dev
, vdev
->config_vector
);
326 /* Make it possible for guest to discover an error took place. */
327 if (msix_vector_use(&proxy
->pci_dev
, val
) < 0)
328 val
= VIRTIO_NO_VECTOR
;
329 vdev
->config_vector
= val
;
331 case VIRTIO_MSI_QUEUE_VECTOR
:
332 msix_vector_unuse(&proxy
->pci_dev
,
333 virtio_queue_vector(vdev
, vdev
->queue_sel
));
334 /* Make it possible for guest to discover an error took place. */
335 if (msix_vector_use(&proxy
->pci_dev
, val
) < 0)
336 val
= VIRTIO_NO_VECTOR
;
337 virtio_queue_set_vector(vdev
, vdev
->queue_sel
, val
);
340 error_report("%s: unexpected address 0x%x value 0x%x",
341 __func__
, addr
, val
);
346 static uint32_t virtio_ioport_read(VirtIOPCIProxy
*proxy
, uint32_t addr
)
348 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
349 uint32_t ret
= 0xFFFFFFFF;
352 case VIRTIO_PCI_HOST_FEATURES
:
353 ret
= proxy
->host_features
;
355 case VIRTIO_PCI_GUEST_FEATURES
:
356 ret
= vdev
->guest_features
;
358 case VIRTIO_PCI_QUEUE_PFN
:
359 ret
= virtio_queue_get_addr(vdev
, vdev
->queue_sel
)
360 >> VIRTIO_PCI_QUEUE_ADDR_SHIFT
;
362 case VIRTIO_PCI_QUEUE_NUM
:
363 ret
= virtio_queue_get_num(vdev
, vdev
->queue_sel
);
365 case VIRTIO_PCI_QUEUE_SEL
:
366 ret
= vdev
->queue_sel
;
368 case VIRTIO_PCI_STATUS
:
372 /* reading from the ISR also clears it. */
375 pci_irq_deassert(&proxy
->pci_dev
);
377 case VIRTIO_MSI_CONFIG_VECTOR
:
378 ret
= vdev
->config_vector
;
380 case VIRTIO_MSI_QUEUE_VECTOR
:
381 ret
= virtio_queue_vector(vdev
, vdev
->queue_sel
);
390 static uint64_t virtio_pci_config_read(void *opaque
, hwaddr addr
,
393 VirtIOPCIProxy
*proxy
= opaque
;
394 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
395 uint32_t config
= VIRTIO_PCI_CONFIG(&proxy
->pci_dev
);
398 return virtio_ioport_read(proxy
, addr
);
404 val
= virtio_config_readb(vdev
, addr
);
407 val
= virtio_config_readw(vdev
, addr
);
408 if (virtio_is_big_endian(vdev
)) {
413 val
= virtio_config_readl(vdev
, addr
);
414 if (virtio_is_big_endian(vdev
)) {
422 static void virtio_pci_config_write(void *opaque
, hwaddr addr
,
423 uint64_t val
, unsigned size
)
425 VirtIOPCIProxy
*proxy
= opaque
;
426 uint32_t config
= VIRTIO_PCI_CONFIG(&proxy
->pci_dev
);
427 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
429 virtio_ioport_write(proxy
, addr
, val
);
434 * Virtio-PCI is odd. Ioports are LE but config space is target native
439 virtio_config_writeb(vdev
, addr
, val
);
442 if (virtio_is_big_endian(vdev
)) {
445 virtio_config_writew(vdev
, addr
, val
);
448 if (virtio_is_big_endian(vdev
)) {
451 virtio_config_writel(vdev
, addr
, val
);
456 static const MemoryRegionOps virtio_pci_config_ops
= {
457 .read
= virtio_pci_config_read
,
458 .write
= virtio_pci_config_write
,
460 .min_access_size
= 1,
461 .max_access_size
= 4,
463 .endianness
= DEVICE_LITTLE_ENDIAN
,
466 static void virtio_write_config(PCIDevice
*pci_dev
, uint32_t address
,
467 uint32_t val
, int len
)
469 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
470 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
472 pci_default_write_config(pci_dev
, address
, val
, len
);
474 if (range_covers_byte(address
, len
, PCI_COMMAND
) &&
475 !(pci_dev
->config
[PCI_COMMAND
] & PCI_COMMAND_MASTER
)) {
476 virtio_pci_stop_ioeventfd(proxy
);
477 virtio_set_status(vdev
, vdev
->status
& ~VIRTIO_CONFIG_S_DRIVER_OK
);
481 static unsigned virtio_pci_get_features(DeviceState
*d
)
483 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
484 return proxy
->host_features
;
487 static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy
*proxy
,
488 unsigned int queue_no
,
492 VirtIOIRQFD
*irqfd
= &proxy
->vector_irqfd
[vector
];
495 if (irqfd
->users
== 0) {
496 ret
= kvm_irqchip_add_msi_route(kvm_state
, msg
);
506 static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy
*proxy
,
509 VirtIOIRQFD
*irqfd
= &proxy
->vector_irqfd
[vector
];
510 if (--irqfd
->users
== 0) {
511 kvm_irqchip_release_virq(kvm_state
, irqfd
->virq
);
515 static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy
*proxy
,
516 unsigned int queue_no
,
519 VirtIOIRQFD
*irqfd
= &proxy
->vector_irqfd
[vector
];
520 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
521 VirtQueue
*vq
= virtio_get_queue(vdev
, queue_no
);
522 EventNotifier
*n
= virtio_queue_get_guest_notifier(vq
);
524 ret
= kvm_irqchip_add_irqfd_notifier(kvm_state
, n
, NULL
, irqfd
->virq
);
528 static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy
*proxy
,
529 unsigned int queue_no
,
532 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
533 VirtQueue
*vq
= virtio_get_queue(vdev
, queue_no
);
534 EventNotifier
*n
= virtio_queue_get_guest_notifier(vq
);
535 VirtIOIRQFD
*irqfd
= &proxy
->vector_irqfd
[vector
];
538 ret
= kvm_irqchip_remove_irqfd_notifier(kvm_state
, n
, irqfd
->virq
);
542 static int kvm_virtio_pci_vector_use(VirtIOPCIProxy
*proxy
, int nvqs
)
544 PCIDevice
*dev
= &proxy
->pci_dev
;
545 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
546 VirtioDeviceClass
*k
= VIRTIO_DEVICE_GET_CLASS(vdev
);
551 for (queue_no
= 0; queue_no
< nvqs
; queue_no
++) {
552 if (!virtio_queue_get_num(vdev
, queue_no
)) {
555 vector
= virtio_queue_vector(vdev
, queue_no
);
556 if (vector
>= msix_nr_vectors_allocated(dev
)) {
559 msg
= msix_get_message(dev
, vector
);
560 ret
= kvm_virtio_pci_vq_vector_use(proxy
, queue_no
, vector
, msg
);
564 /* If guest supports masking, set up irqfd now.
565 * Otherwise, delay until unmasked in the frontend.
567 if (k
->guest_notifier_mask
) {
568 ret
= kvm_virtio_pci_irqfd_use(proxy
, queue_no
, vector
);
570 kvm_virtio_pci_vq_vector_release(proxy
, vector
);
578 while (--queue_no
>= 0) {
579 vector
= virtio_queue_vector(vdev
, queue_no
);
580 if (vector
>= msix_nr_vectors_allocated(dev
)) {
583 if (k
->guest_notifier_mask
) {
584 kvm_virtio_pci_irqfd_release(proxy
, queue_no
, vector
);
586 kvm_virtio_pci_vq_vector_release(proxy
, vector
);
591 static void kvm_virtio_pci_vector_release(VirtIOPCIProxy
*proxy
, int nvqs
)
593 PCIDevice
*dev
= &proxy
->pci_dev
;
594 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
597 VirtioDeviceClass
*k
= VIRTIO_DEVICE_GET_CLASS(vdev
);
599 for (queue_no
= 0; queue_no
< nvqs
; queue_no
++) {
600 if (!virtio_queue_get_num(vdev
, queue_no
)) {
603 vector
= virtio_queue_vector(vdev
, queue_no
);
604 if (vector
>= msix_nr_vectors_allocated(dev
)) {
607 /* If guest supports masking, clean up irqfd now.
608 * Otherwise, it was cleaned when masked in the frontend.
610 if (k
->guest_notifier_mask
) {
611 kvm_virtio_pci_irqfd_release(proxy
, queue_no
, vector
);
613 kvm_virtio_pci_vq_vector_release(proxy
, vector
);
617 static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy
*proxy
,
618 unsigned int queue_no
,
622 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
623 VirtioDeviceClass
*k
= VIRTIO_DEVICE_GET_CLASS(vdev
);
624 VirtQueue
*vq
= virtio_get_queue(vdev
, queue_no
);
625 EventNotifier
*n
= virtio_queue_get_guest_notifier(vq
);
629 if (proxy
->vector_irqfd
) {
630 irqfd
= &proxy
->vector_irqfd
[vector
];
631 if (irqfd
->msg
.data
!= msg
.data
|| irqfd
->msg
.address
!= msg
.address
) {
632 ret
= kvm_irqchip_update_msi_route(kvm_state
, irqfd
->virq
, msg
);
639 /* If guest supports masking, irqfd is already setup, unmask it.
640 * Otherwise, set it up now.
642 if (k
->guest_notifier_mask
) {
643 k
->guest_notifier_mask(vdev
, queue_no
, false);
644 /* Test after unmasking to avoid losing events. */
645 if (k
->guest_notifier_pending
&&
646 k
->guest_notifier_pending(vdev
, queue_no
)) {
647 event_notifier_set(n
);
650 ret
= kvm_virtio_pci_irqfd_use(proxy
, queue_no
, vector
);
655 static void virtio_pci_vq_vector_mask(VirtIOPCIProxy
*proxy
,
656 unsigned int queue_no
,
659 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
660 VirtioDeviceClass
*k
= VIRTIO_DEVICE_GET_CLASS(vdev
);
662 /* If guest supports masking, keep irqfd but mask it.
663 * Otherwise, clean it up now.
665 if (k
->guest_notifier_mask
) {
666 k
->guest_notifier_mask(vdev
, queue_no
, true);
668 kvm_virtio_pci_irqfd_release(proxy
, queue_no
, vector
);
672 static int virtio_pci_vector_unmask(PCIDevice
*dev
, unsigned vector
,
675 VirtIOPCIProxy
*proxy
= container_of(dev
, VirtIOPCIProxy
, pci_dev
);
676 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
679 for (queue_no
= 0; queue_no
< proxy
->nvqs_with_notifiers
; queue_no
++) {
680 if (!virtio_queue_get_num(vdev
, queue_no
)) {
683 if (virtio_queue_vector(vdev
, queue_no
) != vector
) {
686 ret
= virtio_pci_vq_vector_unmask(proxy
, queue_no
, vector
, msg
);
694 while (--queue_no
>= 0) {
695 if (virtio_queue_vector(vdev
, queue_no
) != vector
) {
698 virtio_pci_vq_vector_mask(proxy
, queue_no
, vector
);
703 static void virtio_pci_vector_mask(PCIDevice
*dev
, unsigned vector
)
705 VirtIOPCIProxy
*proxy
= container_of(dev
, VirtIOPCIProxy
, pci_dev
);
706 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
709 for (queue_no
= 0; queue_no
< proxy
->nvqs_with_notifiers
; queue_no
++) {
710 if (!virtio_queue_get_num(vdev
, queue_no
)) {
713 if (virtio_queue_vector(vdev
, queue_no
) != vector
) {
716 virtio_pci_vq_vector_mask(proxy
, queue_no
, vector
);
720 static void virtio_pci_vector_poll(PCIDevice
*dev
,
721 unsigned int vector_start
,
722 unsigned int vector_end
)
724 VirtIOPCIProxy
*proxy
= container_of(dev
, VirtIOPCIProxy
, pci_dev
);
725 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
726 VirtioDeviceClass
*k
= VIRTIO_DEVICE_GET_CLASS(vdev
);
729 EventNotifier
*notifier
;
732 for (queue_no
= 0; queue_no
< proxy
->nvqs_with_notifiers
; queue_no
++) {
733 if (!virtio_queue_get_num(vdev
, queue_no
)) {
736 vector
= virtio_queue_vector(vdev
, queue_no
);
737 if (vector
< vector_start
|| vector
>= vector_end
||
738 !msix_is_masked(dev
, vector
)) {
741 vq
= virtio_get_queue(vdev
, queue_no
);
742 notifier
= virtio_queue_get_guest_notifier(vq
);
743 if (k
->guest_notifier_pending
) {
744 if (k
->guest_notifier_pending(vdev
, queue_no
)) {
745 msix_set_pending(dev
, vector
);
747 } else if (event_notifier_test_and_clear(notifier
)) {
748 msix_set_pending(dev
, vector
);
753 static int virtio_pci_set_guest_notifier(DeviceState
*d
, int n
, bool assign
,
756 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
757 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
758 VirtioDeviceClass
*vdc
= VIRTIO_DEVICE_GET_CLASS(vdev
);
759 VirtQueue
*vq
= virtio_get_queue(vdev
, n
);
760 EventNotifier
*notifier
= virtio_queue_get_guest_notifier(vq
);
763 int r
= event_notifier_init(notifier
, 0);
767 virtio_queue_set_guest_notifier_fd_handler(vq
, true, with_irqfd
);
769 virtio_queue_set_guest_notifier_fd_handler(vq
, false, with_irqfd
);
770 event_notifier_cleanup(notifier
);
773 if (!msix_enabled(&proxy
->pci_dev
) && vdc
->guest_notifier_mask
) {
774 vdc
->guest_notifier_mask(vdev
, n
, !assign
);
780 static bool virtio_pci_query_guest_notifiers(DeviceState
*d
)
782 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
783 return msix_enabled(&proxy
->pci_dev
);
786 static int virtio_pci_set_guest_notifiers(DeviceState
*d
, int nvqs
, bool assign
)
788 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
789 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
790 VirtioDeviceClass
*k
= VIRTIO_DEVICE_GET_CLASS(vdev
);
792 bool with_irqfd
= msix_enabled(&proxy
->pci_dev
) &&
793 kvm_msi_via_irqfd_enabled();
795 nvqs
= MIN(nvqs
, VIRTIO_PCI_QUEUE_MAX
);
797 /* When deassigning, pass a consistent nvqs value
798 * to avoid leaking notifiers.
800 assert(assign
|| nvqs
== proxy
->nvqs_with_notifiers
);
802 proxy
->nvqs_with_notifiers
= nvqs
;
804 /* Must unset vector notifier while guest notifier is still assigned */
805 if ((proxy
->vector_irqfd
|| k
->guest_notifier_mask
) && !assign
) {
806 msix_unset_vector_notifiers(&proxy
->pci_dev
);
807 if (proxy
->vector_irqfd
) {
808 kvm_virtio_pci_vector_release(proxy
, nvqs
);
809 g_free(proxy
->vector_irqfd
);
810 proxy
->vector_irqfd
= NULL
;
814 for (n
= 0; n
< nvqs
; n
++) {
815 if (!virtio_queue_get_num(vdev
, n
)) {
819 r
= virtio_pci_set_guest_notifier(d
, n
, assign
, with_irqfd
);
825 /* Must set vector notifier after guest notifier has been assigned */
826 if ((with_irqfd
|| k
->guest_notifier_mask
) && assign
) {
828 proxy
->vector_irqfd
=
829 g_malloc0(sizeof(*proxy
->vector_irqfd
) *
830 msix_nr_vectors_allocated(&proxy
->pci_dev
));
831 r
= kvm_virtio_pci_vector_use(proxy
, nvqs
);
836 r
= msix_set_vector_notifiers(&proxy
->pci_dev
,
837 virtio_pci_vector_unmask
,
838 virtio_pci_vector_mask
,
839 virtio_pci_vector_poll
);
841 goto notifiers_error
;
850 kvm_virtio_pci_vector_release(proxy
, nvqs
);
854 /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
857 virtio_pci_set_guest_notifier(d
, n
, !assign
, with_irqfd
);
862 static int virtio_pci_set_host_notifier(DeviceState
*d
, int n
, bool assign
)
864 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
866 /* Stop using ioeventfd for virtqueue kick if the device starts using host
867 * notifiers. This makes it easy to avoid stepping on each others' toes.
869 proxy
->ioeventfd_disabled
= assign
;
871 virtio_pci_stop_ioeventfd(proxy
);
873 /* We don't need to start here: it's not needed because backend
874 * currently only stops on status change away from ok,
875 * reset, vmstop and such. If we do add code to start here,
876 * need to check vmstate, device state etc. */
877 return virtio_pci_set_host_notifier_internal(proxy
, n
, assign
, false);
880 static void virtio_pci_vmstate_change(DeviceState
*d
, bool running
)
882 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
883 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
886 /* Old QEMU versions did not set bus master enable on status write.
887 * Detect DRIVER set and enable it.
889 if ((proxy
->flags
& VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION
) &&
890 (vdev
->status
& VIRTIO_CONFIG_S_DRIVER
) &&
891 !(proxy
->pci_dev
.config
[PCI_COMMAND
] & PCI_COMMAND_MASTER
)) {
892 pci_default_write_config(&proxy
->pci_dev
, PCI_COMMAND
,
893 proxy
->pci_dev
.config
[PCI_COMMAND
] |
894 PCI_COMMAND_MASTER
, 1);
896 virtio_pci_start_ioeventfd(proxy
);
898 virtio_pci_stop_ioeventfd(proxy
);
903 static int virtio_9p_init_pci(VirtIOPCIProxy
*vpci_dev
)
905 V9fsPCIState
*dev
= VIRTIO_9P_PCI(vpci_dev
);
906 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
908 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
909 if (qdev_init(vdev
) < 0) {
915 static Property virtio_9p_pci_properties
[] = {
916 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
,
917 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, true),
918 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
, 2),
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
);
941 virtio_instance_init_common(obj
, &dev
->vdev
, sizeof(dev
->vdev
),
945 static const TypeInfo virtio_9p_pci_info
= {
946 .name
= TYPE_VIRTIO_9P_PCI
,
947 .parent
= TYPE_VIRTIO_PCI
,
948 .instance_size
= sizeof(V9fsPCIState
),
949 .instance_init
= virtio_9p_pci_instance_init
,
950 .class_init
= virtio_9p_pci_class_init
,
952 #endif /* CONFIG_VIRTFS */
955 * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
958 /* This is called by virtio-bus just after the device is plugged. */
959 static void virtio_pci_device_plugged(DeviceState
*d
)
961 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(d
);
962 VirtioBusState
*bus
= &proxy
->bus
;
966 config
= proxy
->pci_dev
.config
;
967 if (proxy
->class_code
) {
968 pci_config_set_class(config
, proxy
->class_code
);
970 pci_set_word(config
+ PCI_SUBSYSTEM_VENDOR_ID
,
971 pci_get_word(config
+ PCI_VENDOR_ID
));
972 pci_set_word(config
+ PCI_SUBSYSTEM_ID
, virtio_bus_get_vdev_id(bus
));
973 config
[PCI_INTERRUPT_PIN
] = 1;
975 if (proxy
->nvectors
&&
976 msix_init_exclusive_bar(&proxy
->pci_dev
, proxy
->nvectors
, 1)) {
977 error_report("unable to init msix vectors to %" PRIu32
,
982 proxy
->pci_dev
.config_write
= virtio_write_config
;
984 size
= VIRTIO_PCI_REGION_SIZE(&proxy
->pci_dev
)
985 + virtio_bus_get_vdev_config_len(bus
);
986 if (size
& (size
- 1)) {
987 size
= 1 << qemu_fls(size
);
990 memory_region_init_io(&proxy
->bar
, OBJECT(proxy
), &virtio_pci_config_ops
,
991 proxy
, "virtio-pci", size
);
992 pci_register_bar(&proxy
->pci_dev
, 0, PCI_BASE_ADDRESS_SPACE_IO
,
995 if (!kvm_has_many_ioeventfds()) {
996 proxy
->flags
&= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD
;
999 proxy
->host_features
|= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY
;
1000 proxy
->host_features
|= 0x1 << VIRTIO_F_BAD_FEATURE
;
1001 proxy
->host_features
= virtio_bus_get_vdev_features(bus
,
1002 proxy
->host_features
);
1005 static void virtio_pci_device_unplugged(DeviceState
*d
)
1007 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(d
);
1009 virtio_pci_stop_ioeventfd(proxy
);
1012 static int virtio_pci_init(PCIDevice
*pci_dev
)
1014 VirtIOPCIProxy
*dev
= VIRTIO_PCI(pci_dev
);
1015 VirtioPCIClass
*k
= VIRTIO_PCI_GET_CLASS(pci_dev
);
1016 virtio_pci_bus_new(&dev
->bus
, sizeof(dev
->bus
), dev
);
1017 if (k
->init
!= NULL
) {
1018 return k
->init(dev
);
1023 static void virtio_pci_exit(PCIDevice
*pci_dev
)
1025 msix_uninit_exclusive_bar(pci_dev
);
1028 static void virtio_pci_reset(DeviceState
*qdev
)
1030 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(qdev
);
1031 VirtioBusState
*bus
= VIRTIO_BUS(&proxy
->bus
);
1032 virtio_pci_stop_ioeventfd(proxy
);
1033 virtio_bus_reset(bus
);
1034 msix_unuse_all_vectors(&proxy
->pci_dev
);
1037 static Property virtio_pci_properties
[] = {
1038 DEFINE_PROP_BIT("virtio-pci-bus-master-bug-migration", VirtIOPCIProxy
, flags
,
1039 VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT
, false),
1040 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy
, host_features
),
1041 DEFINE_PROP_END_OF_LIST(),
1044 static void virtio_pci_class_init(ObjectClass
*klass
, void *data
)
1046 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1047 PCIDeviceClass
*k
= PCI_DEVICE_CLASS(klass
);
1049 dc
->props
= virtio_pci_properties
;
1050 k
->init
= virtio_pci_init
;
1051 k
->exit
= virtio_pci_exit
;
1052 k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1053 k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1054 k
->class_id
= PCI_CLASS_OTHERS
;
1055 dc
->reset
= virtio_pci_reset
;
1058 static const TypeInfo virtio_pci_info
= {
1059 .name
= TYPE_VIRTIO_PCI
,
1060 .parent
= TYPE_PCI_DEVICE
,
1061 .instance_size
= sizeof(VirtIOPCIProxy
),
1062 .class_init
= virtio_pci_class_init
,
1063 .class_size
= sizeof(VirtioPCIClass
),
1067 /* virtio-blk-pci */
1069 static Property virtio_blk_pci_properties
[] = {
1070 DEFINE_PROP_UINT32("class", VirtIOPCIProxy
, class_code
, 0),
1071 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
,
1072 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, true),
1073 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
, 2),
1074 DEFINE_PROP_END_OF_LIST(),
1077 static int virtio_blk_pci_init(VirtIOPCIProxy
*vpci_dev
)
1079 VirtIOBlkPCI
*dev
= VIRTIO_BLK_PCI(vpci_dev
);
1080 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
1081 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
1082 if (qdev_init(vdev
) < 0) {
1088 static void virtio_blk_pci_class_init(ObjectClass
*klass
, void *data
)
1090 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1091 VirtioPCIClass
*k
= VIRTIO_PCI_CLASS(klass
);
1092 PCIDeviceClass
*pcidev_k
= PCI_DEVICE_CLASS(klass
);
1094 set_bit(DEVICE_CATEGORY_STORAGE
, dc
->categories
);
1095 dc
->props
= virtio_blk_pci_properties
;
1096 k
->init
= virtio_blk_pci_init
;
1097 pcidev_k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1098 pcidev_k
->device_id
= PCI_DEVICE_ID_VIRTIO_BLOCK
;
1099 pcidev_k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1100 pcidev_k
->class_id
= PCI_CLASS_STORAGE_SCSI
;
1103 static void virtio_blk_pci_instance_init(Object
*obj
)
1105 VirtIOBlkPCI
*dev
= VIRTIO_BLK_PCI(obj
);
1107 virtio_instance_init_common(obj
, &dev
->vdev
, sizeof(dev
->vdev
),
1109 object_property_add_alias(obj
, "iothread", OBJECT(&dev
->vdev
),"iothread",
1111 object_property_add_alias(obj
, "bootindex", OBJECT(&dev
->vdev
),
1112 "bootindex", &error_abort
);
1115 static const TypeInfo virtio_blk_pci_info
= {
1116 .name
= TYPE_VIRTIO_BLK_PCI
,
1117 .parent
= TYPE_VIRTIO_PCI
,
1118 .instance_size
= sizeof(VirtIOBlkPCI
),
1119 .instance_init
= virtio_blk_pci_instance_init
,
1120 .class_init
= virtio_blk_pci_class_init
,
1123 /* virtio-scsi-pci */
1125 static Property virtio_scsi_pci_properties
[] = {
1126 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
,
1127 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, true),
1128 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
,
1129 DEV_NVECTORS_UNSPECIFIED
),
1130 DEFINE_VIRTIO_SCSI_FEATURES(VirtIOPCIProxy
, host_features
),
1131 DEFINE_PROP_END_OF_LIST(),
1134 static int virtio_scsi_pci_init_pci(VirtIOPCIProxy
*vpci_dev
)
1136 VirtIOSCSIPCI
*dev
= VIRTIO_SCSI_PCI(vpci_dev
);
1137 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
1138 VirtIOSCSICommon
*vs
= VIRTIO_SCSI_COMMON(vdev
);
1139 DeviceState
*proxy
= DEVICE(vpci_dev
);
1142 if (vpci_dev
->nvectors
== DEV_NVECTORS_UNSPECIFIED
) {
1143 vpci_dev
->nvectors
= vs
->conf
.num_queues
+ 3;
1147 * For command line compatibility, this sets the virtio-scsi-device bus
1151 bus_name
= g_strdup_printf("%s.0", proxy
->id
);
1152 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev
), bus_name
);
1156 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
1157 if (qdev_init(vdev
) < 0) {
1163 static void virtio_scsi_pci_class_init(ObjectClass
*klass
, void *data
)
1165 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1166 VirtioPCIClass
*k
= VIRTIO_PCI_CLASS(klass
);
1167 PCIDeviceClass
*pcidev_k
= PCI_DEVICE_CLASS(klass
);
1168 k
->init
= virtio_scsi_pci_init_pci
;
1169 set_bit(DEVICE_CATEGORY_STORAGE
, dc
->categories
);
1170 dc
->props
= virtio_scsi_pci_properties
;
1171 pcidev_k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1172 pcidev_k
->device_id
= PCI_DEVICE_ID_VIRTIO_SCSI
;
1173 pcidev_k
->revision
= 0x00;
1174 pcidev_k
->class_id
= PCI_CLASS_STORAGE_SCSI
;
1177 static void virtio_scsi_pci_instance_init(Object
*obj
)
1179 VirtIOSCSIPCI
*dev
= VIRTIO_SCSI_PCI(obj
);
1181 virtio_instance_init_common(obj
, &dev
->vdev
, sizeof(dev
->vdev
),
1183 object_property_add_alias(obj
, "iothread", OBJECT(&dev
->vdev
), "iothread",
1187 static const TypeInfo virtio_scsi_pci_info
= {
1188 .name
= TYPE_VIRTIO_SCSI_PCI
,
1189 .parent
= TYPE_VIRTIO_PCI
,
1190 .instance_size
= sizeof(VirtIOSCSIPCI
),
1191 .instance_init
= virtio_scsi_pci_instance_init
,
1192 .class_init
= virtio_scsi_pci_class_init
,
1195 /* vhost-scsi-pci */
1197 #ifdef CONFIG_VHOST_SCSI
1198 static Property vhost_scsi_pci_properties
[] = {
1199 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
,
1200 DEV_NVECTORS_UNSPECIFIED
),
1201 DEFINE_PROP_END_OF_LIST(),
1204 static int vhost_scsi_pci_init_pci(VirtIOPCIProxy
*vpci_dev
)
1206 VHostSCSIPCI
*dev
= VHOST_SCSI_PCI(vpci_dev
);
1207 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
1208 VirtIOSCSICommon
*vs
= VIRTIO_SCSI_COMMON(vdev
);
1210 if (vpci_dev
->nvectors
== DEV_NVECTORS_UNSPECIFIED
) {
1211 vpci_dev
->nvectors
= vs
->conf
.num_queues
+ 3;
1214 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
1215 if (qdev_init(vdev
) < 0) {
1221 static void vhost_scsi_pci_class_init(ObjectClass
*klass
, void *data
)
1223 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1224 VirtioPCIClass
*k
= VIRTIO_PCI_CLASS(klass
);
1225 PCIDeviceClass
*pcidev_k
= PCI_DEVICE_CLASS(klass
);
1226 k
->init
= vhost_scsi_pci_init_pci
;
1227 set_bit(DEVICE_CATEGORY_STORAGE
, dc
->categories
);
1228 dc
->props
= vhost_scsi_pci_properties
;
1229 pcidev_k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1230 pcidev_k
->device_id
= PCI_DEVICE_ID_VIRTIO_SCSI
;
1231 pcidev_k
->revision
= 0x00;
1232 pcidev_k
->class_id
= PCI_CLASS_STORAGE_SCSI
;
1235 static void vhost_scsi_pci_instance_init(Object
*obj
)
1237 VHostSCSIPCI
*dev
= VHOST_SCSI_PCI(obj
);
1239 virtio_instance_init_common(obj
, &dev
->vdev
, sizeof(dev
->vdev
),
1243 static const TypeInfo vhost_scsi_pci_info
= {
1244 .name
= TYPE_VHOST_SCSI_PCI
,
1245 .parent
= TYPE_VIRTIO_PCI
,
1246 .instance_size
= sizeof(VHostSCSIPCI
),
1247 .instance_init
= vhost_scsi_pci_instance_init
,
1248 .class_init
= vhost_scsi_pci_class_init
,
1252 /* virtio-balloon-pci */
1254 static void balloon_pci_stats_get_all(Object
*obj
, struct Visitor
*v
,
1255 void *opaque
, const char *name
,
1258 VirtIOBalloonPCI
*dev
= opaque
;
1259 object_property_get(OBJECT(&dev
->vdev
), v
, "guest-stats", errp
);
1262 static void balloon_pci_stats_get_poll_interval(Object
*obj
, struct Visitor
*v
,
1263 void *opaque
, const char *name
,
1266 VirtIOBalloonPCI
*dev
= opaque
;
1267 object_property_get(OBJECT(&dev
->vdev
), v
, "guest-stats-polling-interval",
1271 static void balloon_pci_stats_set_poll_interval(Object
*obj
, struct Visitor
*v
,
1272 void *opaque
, const char *name
,
1275 VirtIOBalloonPCI
*dev
= opaque
;
1276 object_property_set(OBJECT(&dev
->vdev
), v
, "guest-stats-polling-interval",
1280 static Property virtio_balloon_pci_properties
[] = {
1281 DEFINE_PROP_UINT32("class", VirtIOPCIProxy
, class_code
, 0),
1282 DEFINE_PROP_END_OF_LIST(),
1285 static int virtio_balloon_pci_init(VirtIOPCIProxy
*vpci_dev
)
1287 VirtIOBalloonPCI
*dev
= VIRTIO_BALLOON_PCI(vpci_dev
);
1288 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
1290 if (vpci_dev
->class_code
!= PCI_CLASS_OTHERS
&&
1291 vpci_dev
->class_code
!= PCI_CLASS_MEMORY_RAM
) { /* qemu < 1.1 */
1292 vpci_dev
->class_code
= PCI_CLASS_OTHERS
;
1295 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
1296 if (qdev_init(vdev
) < 0) {
1302 static void virtio_balloon_pci_class_init(ObjectClass
*klass
, void *data
)
1304 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1305 VirtioPCIClass
*k
= VIRTIO_PCI_CLASS(klass
);
1306 PCIDeviceClass
*pcidev_k
= PCI_DEVICE_CLASS(klass
);
1307 k
->init
= virtio_balloon_pci_init
;
1308 set_bit(DEVICE_CATEGORY_MISC
, dc
->categories
);
1309 dc
->props
= virtio_balloon_pci_properties
;
1310 pcidev_k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1311 pcidev_k
->device_id
= PCI_DEVICE_ID_VIRTIO_BALLOON
;
1312 pcidev_k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1313 pcidev_k
->class_id
= PCI_CLASS_OTHERS
;
1316 static void virtio_balloon_pci_instance_init(Object
*obj
)
1318 VirtIOBalloonPCI
*dev
= VIRTIO_BALLOON_PCI(obj
);
1319 object_initialize(&dev
->vdev
, sizeof(dev
->vdev
), TYPE_VIRTIO_BALLOON
);
1320 object_property_add_child(obj
, "virtio-backend", OBJECT(&dev
->vdev
), NULL
);
1321 object_unref(OBJECT(&dev
->vdev
));
1322 object_property_add(obj
, "guest-stats", "guest statistics",
1323 balloon_pci_stats_get_all
, NULL
, NULL
, dev
,
1326 object_property_add(obj
, "guest-stats-polling-interval", "int",
1327 balloon_pci_stats_get_poll_interval
,
1328 balloon_pci_stats_set_poll_interval
,
1332 static const TypeInfo virtio_balloon_pci_info
= {
1333 .name
= TYPE_VIRTIO_BALLOON_PCI
,
1334 .parent
= TYPE_VIRTIO_PCI
,
1335 .instance_size
= sizeof(VirtIOBalloonPCI
),
1336 .instance_init
= virtio_balloon_pci_instance_init
,
1337 .class_init
= virtio_balloon_pci_class_init
,
1340 /* virtio-serial-pci */
1342 static int virtio_serial_pci_init(VirtIOPCIProxy
*vpci_dev
)
1344 VirtIOSerialPCI
*dev
= VIRTIO_SERIAL_PCI(vpci_dev
);
1345 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
1346 DeviceState
*proxy
= DEVICE(vpci_dev
);
1349 if (vpci_dev
->class_code
!= PCI_CLASS_COMMUNICATION_OTHER
&&
1350 vpci_dev
->class_code
!= PCI_CLASS_DISPLAY_OTHER
&& /* qemu 0.10 */
1351 vpci_dev
->class_code
!= PCI_CLASS_OTHERS
) { /* qemu-kvm */
1352 vpci_dev
->class_code
= PCI_CLASS_COMMUNICATION_OTHER
;
1355 /* backwards-compatibility with machines that were created with
1356 DEV_NVECTORS_UNSPECIFIED */
1357 if (vpci_dev
->nvectors
== DEV_NVECTORS_UNSPECIFIED
) {
1358 vpci_dev
->nvectors
= dev
->vdev
.serial
.max_virtserial_ports
+ 1;
1362 * For command line compatibility, this sets the virtio-serial-device bus
1366 bus_name
= g_strdup_printf("%s.0", proxy
->id
);
1367 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev
), bus_name
);
1371 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
1372 if (qdev_init(vdev
) < 0) {
1378 static Property virtio_serial_pci_properties
[] = {
1379 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
,
1380 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, true),
1381 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
, 2),
1382 DEFINE_PROP_UINT32("class", VirtIOPCIProxy
, class_code
, 0),
1383 DEFINE_PROP_END_OF_LIST(),
1386 static void virtio_serial_pci_class_init(ObjectClass
*klass
, void *data
)
1388 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1389 VirtioPCIClass
*k
= VIRTIO_PCI_CLASS(klass
);
1390 PCIDeviceClass
*pcidev_k
= PCI_DEVICE_CLASS(klass
);
1391 k
->init
= virtio_serial_pci_init
;
1392 set_bit(DEVICE_CATEGORY_INPUT
, dc
->categories
);
1393 dc
->props
= virtio_serial_pci_properties
;
1394 pcidev_k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1395 pcidev_k
->device_id
= PCI_DEVICE_ID_VIRTIO_CONSOLE
;
1396 pcidev_k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1397 pcidev_k
->class_id
= PCI_CLASS_COMMUNICATION_OTHER
;
1400 static void virtio_serial_pci_instance_init(Object
*obj
)
1402 VirtIOSerialPCI
*dev
= VIRTIO_SERIAL_PCI(obj
);
1404 virtio_instance_init_common(obj
, &dev
->vdev
, sizeof(dev
->vdev
),
1405 TYPE_VIRTIO_SERIAL
);
1408 static const TypeInfo virtio_serial_pci_info
= {
1409 .name
= TYPE_VIRTIO_SERIAL_PCI
,
1410 .parent
= TYPE_VIRTIO_PCI
,
1411 .instance_size
= sizeof(VirtIOSerialPCI
),
1412 .instance_init
= virtio_serial_pci_instance_init
,
1413 .class_init
= virtio_serial_pci_class_init
,
1416 /* virtio-net-pci */
1418 static Property virtio_net_properties
[] = {
1419 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
,
1420 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, false),
1421 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
, 3),
1422 DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy
, host_features
),
1423 DEFINE_PROP_END_OF_LIST(),
1426 static int virtio_net_pci_init(VirtIOPCIProxy
*vpci_dev
)
1428 DeviceState
*qdev
= DEVICE(vpci_dev
);
1429 VirtIONetPCI
*dev
= VIRTIO_NET_PCI(vpci_dev
);
1430 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
1432 virtio_net_set_config_size(&dev
->vdev
, vpci_dev
->host_features
);
1433 virtio_net_set_netclient_name(&dev
->vdev
, qdev
->id
,
1434 object_get_typename(OBJECT(qdev
)));
1435 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
1436 if (qdev_init(vdev
) < 0) {
1442 static void virtio_net_pci_class_init(ObjectClass
*klass
, void *data
)
1444 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1445 PCIDeviceClass
*k
= PCI_DEVICE_CLASS(klass
);
1446 VirtioPCIClass
*vpciklass
= VIRTIO_PCI_CLASS(klass
);
1448 k
->romfile
= "efi-virtio.rom";
1449 k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1450 k
->device_id
= PCI_DEVICE_ID_VIRTIO_NET
;
1451 k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1452 k
->class_id
= PCI_CLASS_NETWORK_ETHERNET
;
1453 set_bit(DEVICE_CATEGORY_NETWORK
, dc
->categories
);
1454 dc
->props
= virtio_net_properties
;
1455 vpciklass
->init
= virtio_net_pci_init
;
1458 static void virtio_net_pci_instance_init(Object
*obj
)
1460 VirtIONetPCI
*dev
= VIRTIO_NET_PCI(obj
);
1462 virtio_instance_init_common(obj
, &dev
->vdev
, sizeof(dev
->vdev
),
1464 object_property_add_alias(obj
, "bootindex", OBJECT(&dev
->vdev
),
1465 "bootindex", &error_abort
);
1468 static const TypeInfo virtio_net_pci_info
= {
1469 .name
= TYPE_VIRTIO_NET_PCI
,
1470 .parent
= TYPE_VIRTIO_PCI
,
1471 .instance_size
= sizeof(VirtIONetPCI
),
1472 .instance_init
= virtio_net_pci_instance_init
,
1473 .class_init
= virtio_net_pci_class_init
,
1476 /* virtio-rng-pci */
1478 static Property virtio_rng_pci_properties
[] = {
1479 DEFINE_PROP_END_OF_LIST(),
1482 static int virtio_rng_pci_init(VirtIOPCIProxy
*vpci_dev
)
1484 VirtIORngPCI
*vrng
= VIRTIO_RNG_PCI(vpci_dev
);
1485 DeviceState
*vdev
= DEVICE(&vrng
->vdev
);
1487 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
1488 if (qdev_init(vdev
) < 0) {
1492 object_property_set_link(OBJECT(vrng
),
1493 OBJECT(vrng
->vdev
.conf
.rng
), "rng",
1499 static void virtio_rng_pci_class_init(ObjectClass
*klass
, void *data
)
1501 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1502 VirtioPCIClass
*k
= VIRTIO_PCI_CLASS(klass
);
1503 PCIDeviceClass
*pcidev_k
= PCI_DEVICE_CLASS(klass
);
1505 k
->init
= virtio_rng_pci_init
;
1506 set_bit(DEVICE_CATEGORY_MISC
, dc
->categories
);
1507 dc
->props
= virtio_rng_pci_properties
;
1509 pcidev_k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1510 pcidev_k
->device_id
= PCI_DEVICE_ID_VIRTIO_RNG
;
1511 pcidev_k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1512 pcidev_k
->class_id
= PCI_CLASS_OTHERS
;
1515 static void virtio_rng_initfn(Object
*obj
)
1517 VirtIORngPCI
*dev
= VIRTIO_RNG_PCI(obj
);
1519 virtio_instance_init_common(obj
, &dev
->vdev
, sizeof(dev
->vdev
),
1521 object_property_add_alias(obj
, "rng", OBJECT(&dev
->vdev
), "rng",
1525 static const TypeInfo virtio_rng_pci_info
= {
1526 .name
= TYPE_VIRTIO_RNG_PCI
,
1527 .parent
= TYPE_VIRTIO_PCI
,
1528 .instance_size
= sizeof(VirtIORngPCI
),
1529 .instance_init
= virtio_rng_initfn
,
1530 .class_init
= virtio_rng_pci_class_init
,
1533 /* virtio-pci-bus */
1535 static void virtio_pci_bus_new(VirtioBusState
*bus
, size_t bus_size
,
1536 VirtIOPCIProxy
*dev
)
1538 DeviceState
*qdev
= DEVICE(dev
);
1539 char virtio_bus_name
[] = "virtio-bus";
1541 qbus_create_inplace(bus
, bus_size
, TYPE_VIRTIO_PCI_BUS
, qdev
,
1545 static void virtio_pci_bus_class_init(ObjectClass
*klass
, void *data
)
1547 BusClass
*bus_class
= BUS_CLASS(klass
);
1548 VirtioBusClass
*k
= VIRTIO_BUS_CLASS(klass
);
1549 bus_class
->max_dev
= 1;
1550 k
->notify
= virtio_pci_notify
;
1551 k
->save_config
= virtio_pci_save_config
;
1552 k
->load_config
= virtio_pci_load_config
;
1553 k
->save_queue
= virtio_pci_save_queue
;
1554 k
->load_queue
= virtio_pci_load_queue
;
1555 k
->get_features
= virtio_pci_get_features
;
1556 k
->query_guest_notifiers
= virtio_pci_query_guest_notifiers
;
1557 k
->set_host_notifier
= virtio_pci_set_host_notifier
;
1558 k
->set_guest_notifiers
= virtio_pci_set_guest_notifiers
;
1559 k
->vmstate_change
= virtio_pci_vmstate_change
;
1560 k
->device_plugged
= virtio_pci_device_plugged
;
1561 k
->device_unplugged
= virtio_pci_device_unplugged
;
1564 static const TypeInfo virtio_pci_bus_info
= {
1565 .name
= TYPE_VIRTIO_PCI_BUS
,
1566 .parent
= TYPE_VIRTIO_BUS
,
1567 .instance_size
= sizeof(VirtioPCIBusState
),
1568 .class_init
= virtio_pci_bus_class_init
,
1571 static void virtio_pci_register_types(void)
1573 type_register_static(&virtio_rng_pci_info
);
1574 type_register_static(&virtio_pci_bus_info
);
1575 type_register_static(&virtio_pci_info
);
1576 #ifdef CONFIG_VIRTFS
1577 type_register_static(&virtio_9p_pci_info
);
1579 type_register_static(&virtio_blk_pci_info
);
1580 type_register_static(&virtio_scsi_pci_info
);
1581 type_register_static(&virtio_balloon_pci_info
);
1582 type_register_static(&virtio_serial_pci_info
);
1583 type_register_static(&virtio_net_pci_info
);
1584 #ifdef CONFIG_VHOST_SCSI
1585 type_register_static(&vhost_scsi_pci_info
);
1589 type_init(virtio_pci_register_types
)