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"
37 /* from Linux's linux/virtio_pci.h */
39 /* A 32-bit r/o bitmask of the features supported by the host */
40 #define VIRTIO_PCI_HOST_FEATURES 0
42 /* A 32-bit r/w bitmask of features activated by the guest */
43 #define VIRTIO_PCI_GUEST_FEATURES 4
45 /* A 32-bit r/w PFN for the currently selected queue */
46 #define VIRTIO_PCI_QUEUE_PFN 8
48 /* A 16-bit r/o queue size for the currently selected queue */
49 #define VIRTIO_PCI_QUEUE_NUM 12
51 /* A 16-bit r/w queue selector */
52 #define VIRTIO_PCI_QUEUE_SEL 14
54 /* A 16-bit r/w queue notifier */
55 #define VIRTIO_PCI_QUEUE_NOTIFY 16
57 /* An 8-bit device status register. */
58 #define VIRTIO_PCI_STATUS 18
60 /* An 8-bit r/o interrupt status register. Reading the value will return the
61 * current contents of the ISR and will also clear it. This is effectively
62 * a read-and-acknowledge. */
63 #define VIRTIO_PCI_ISR 19
65 /* MSI-X registers: only enabled if MSI-X is enabled. */
66 /* A 16-bit vector for configuration changes. */
67 #define VIRTIO_MSI_CONFIG_VECTOR 20
68 /* A 16-bit vector for selected queue notifications. */
69 #define VIRTIO_MSI_QUEUE_VECTOR 22
71 /* Config space size */
72 #define VIRTIO_PCI_CONFIG_NOMSI 20
73 #define VIRTIO_PCI_CONFIG_MSI 24
74 #define VIRTIO_PCI_REGION_SIZE(dev) (msix_present(dev) ? \
75 VIRTIO_PCI_CONFIG_MSI : \
76 VIRTIO_PCI_CONFIG_NOMSI)
78 /* The remaining space is defined by each driver as the per-driver
79 * configuration space */
80 #define VIRTIO_PCI_CONFIG(dev) (msix_enabled(dev) ? \
81 VIRTIO_PCI_CONFIG_MSI : \
82 VIRTIO_PCI_CONFIG_NOMSI)
84 /* How many bits to shift physical queue address written to QUEUE_PFN.
85 * 12 is historical, and due to x86 page size. */
86 #define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12
88 /* Flags track per-device state like workarounds for quirks in older guests. */
89 #define VIRTIO_PCI_FLAG_BUS_MASTER_BUG (1 << 0)
91 /* QEMU doesn't strictly need write barriers since everything runs in
92 * lock-step. We'll leave the calls to wmb() in though to make it obvious for
93 * KVM or if kqemu gets SMP support.
95 #define wmb() do { } while (0)
97 /* HACK for virtio to determine if it's running a big endian guest */
98 bool virtio_is_big_endian(void);
101 /* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */
102 static inline VirtIOPCIProxy
*to_virtio_pci_proxy(DeviceState
*d
)
104 return container_of(d
, VirtIOPCIProxy
, pci_dev
.qdev
);
107 /* DeviceState to VirtIOPCIProxy. Note: used on datapath,
108 * be careful and test performance if you change this.
110 static inline VirtIOPCIProxy
*to_virtio_pci_proxy_fast(DeviceState
*d
)
112 return container_of(d
, VirtIOPCIProxy
, pci_dev
.qdev
);
115 static void virtio_pci_notify(DeviceState
*d
, uint16_t vector
)
117 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy_fast(d
);
118 if (msix_enabled(&proxy
->pci_dev
))
119 msix_notify(&proxy
->pci_dev
, vector
);
121 qemu_set_irq(proxy
->pci_dev
.irq
[0], proxy
->vdev
->isr
& 1);
124 static void virtio_pci_save_config(DeviceState
*d
, QEMUFile
*f
)
126 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
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
, proxy
->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 if (msix_present(&proxy
->pci_dev
))
137 qemu_put_be16(f
, virtio_queue_vector(proxy
->vdev
, n
));
140 static int virtio_pci_load_config(DeviceState
*d
, QEMUFile
*f
)
142 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
144 ret
= pci_device_load(&proxy
->pci_dev
, f
);
148 msix_unuse_all_vectors(&proxy
->pci_dev
);
149 msix_load(&proxy
->pci_dev
, f
);
150 if (msix_present(&proxy
->pci_dev
)) {
151 qemu_get_be16s(f
, &proxy
->vdev
->config_vector
);
153 proxy
->vdev
->config_vector
= VIRTIO_NO_VECTOR
;
155 if (proxy
->vdev
->config_vector
!= VIRTIO_NO_VECTOR
) {
156 return msix_vector_use(&proxy
->pci_dev
, proxy
->vdev
->config_vector
);
161 static int virtio_pci_load_queue(DeviceState
*d
, int n
, QEMUFile
*f
)
163 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
165 if (msix_present(&proxy
->pci_dev
)) {
166 qemu_get_be16s(f
, &vector
);
168 vector
= VIRTIO_NO_VECTOR
;
170 virtio_queue_set_vector(proxy
->vdev
, n
, vector
);
171 if (vector
!= VIRTIO_NO_VECTOR
) {
172 return msix_vector_use(&proxy
->pci_dev
, vector
);
177 static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy
*proxy
,
178 int n
, bool assign
, bool set_handler
)
180 VirtQueue
*vq
= virtio_get_queue(proxy
->vdev
, n
);
181 EventNotifier
*notifier
= virtio_queue_get_host_notifier(vq
);
185 r
= event_notifier_init(notifier
, 1);
187 error_report("%s: unable to init event notifier: %d",
191 virtio_queue_set_host_notifier_fd_handler(vq
, true, set_handler
);
192 memory_region_add_eventfd(&proxy
->bar
, VIRTIO_PCI_QUEUE_NOTIFY
, 2,
195 memory_region_del_eventfd(&proxy
->bar
, VIRTIO_PCI_QUEUE_NOTIFY
, 2,
197 virtio_queue_set_host_notifier_fd_handler(vq
, false, false);
198 event_notifier_cleanup(notifier
);
203 static void virtio_pci_start_ioeventfd(VirtIOPCIProxy
*proxy
)
207 if (!(proxy
->flags
& VIRTIO_PCI_FLAG_USE_IOEVENTFD
) ||
208 proxy
->ioeventfd_disabled
||
209 proxy
->ioeventfd_started
) {
213 for (n
= 0; n
< VIRTIO_PCI_QUEUE_MAX
; n
++) {
214 if (!virtio_queue_get_num(proxy
->vdev
, n
)) {
218 r
= virtio_pci_set_host_notifier_internal(proxy
, n
, true, true);
223 proxy
->ioeventfd_started
= true;
228 if (!virtio_queue_get_num(proxy
->vdev
, n
)) {
232 r
= virtio_pci_set_host_notifier_internal(proxy
, n
, false, false);
235 proxy
->ioeventfd_started
= false;
236 error_report("%s: failed. Fallback to a userspace (slower).", __func__
);
239 static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy
*proxy
)
244 if (!proxy
->ioeventfd_started
) {
248 for (n
= 0; n
< VIRTIO_PCI_QUEUE_MAX
; n
++) {
249 if (!virtio_queue_get_num(proxy
->vdev
, n
)) {
253 r
= virtio_pci_set_host_notifier_internal(proxy
, n
, false, false);
256 proxy
->ioeventfd_started
= false;
259 static void virtio_pci_reset(DeviceState
*d
)
261 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
262 virtio_pci_stop_ioeventfd(proxy
);
263 virtio_reset(proxy
->vdev
);
264 msix_unuse_all_vectors(&proxy
->pci_dev
);
265 proxy
->flags
&= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG
;
268 static void virtio_ioport_write(void *opaque
, uint32_t addr
, uint32_t val
)
270 VirtIOPCIProxy
*proxy
= opaque
;
271 VirtIODevice
*vdev
= proxy
->vdev
;
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
= vdev
->bad_features
? vdev
->bad_features(vdev
) : 0;
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
);
286 virtio_reset(proxy
->vdev
);
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) {
313 virtio_reset(proxy
->vdev
);
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
= proxy
->vdev
;
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 qemu_set_irq(proxy
->pci_dev
.irq
[0], 0);
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 uint32_t config
= VIRTIO_PCI_CONFIG(&proxy
->pci_dev
);
398 return virtio_ioport_read(proxy
, addr
);
404 val
= virtio_config_readb(proxy
->vdev
, addr
);
407 val
= virtio_config_readw(proxy
->vdev
, addr
);
408 if (virtio_is_big_endian()) {
413 val
= virtio_config_readl(proxy
->vdev
, addr
);
414 if (virtio_is_big_endian()) {
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
);
428 virtio_ioport_write(proxy
, addr
, val
);
433 * Virtio-PCI is odd. Ioports are LE but config space is target native
438 virtio_config_writeb(proxy
->vdev
, addr
, val
);
441 if (virtio_is_big_endian()) {
444 virtio_config_writew(proxy
->vdev
, addr
, val
);
447 if (virtio_is_big_endian()) {
450 virtio_config_writel(proxy
->vdev
, addr
, val
);
455 static const MemoryRegionOps virtio_pci_config_ops
= {
456 .read
= virtio_pci_config_read
,
457 .write
= virtio_pci_config_write
,
459 .min_access_size
= 1,
460 .max_access_size
= 4,
462 .endianness
= DEVICE_LITTLE_ENDIAN
,
465 static void virtio_write_config(PCIDevice
*pci_dev
, uint32_t address
,
466 uint32_t val
, int len
)
468 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
470 pci_default_write_config(pci_dev
, address
, val
, len
);
472 if (range_covers_byte(address
, len
, PCI_COMMAND
) &&
473 !(pci_dev
->config
[PCI_COMMAND
] & PCI_COMMAND_MASTER
) &&
474 !(proxy
->flags
& VIRTIO_PCI_FLAG_BUS_MASTER_BUG
)) {
475 virtio_pci_stop_ioeventfd(proxy
);
476 virtio_set_status(proxy
->vdev
,
477 proxy
->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 VirtQueue
*vq
= virtio_get_queue(proxy
->vdev
, queue_no
);
521 EventNotifier
*n
= virtio_queue_get_guest_notifier(vq
);
523 ret
= kvm_irqchip_add_irqfd_notifier(kvm_state
, n
, irqfd
->virq
);
527 static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy
*proxy
,
528 unsigned int queue_no
,
531 VirtQueue
*vq
= virtio_get_queue(proxy
->vdev
, queue_no
);
532 EventNotifier
*n
= virtio_queue_get_guest_notifier(vq
);
533 VirtIOIRQFD
*irqfd
= &proxy
->vector_irqfd
[vector
];
536 ret
= kvm_irqchip_remove_irqfd_notifier(kvm_state
, n
, irqfd
->virq
);
540 static int kvm_virtio_pci_vector_use(VirtIOPCIProxy
*proxy
, int nvqs
)
542 PCIDevice
*dev
= &proxy
->pci_dev
;
543 VirtIODevice
*vdev
= proxy
->vdev
;
548 for (queue_no
= 0; queue_no
< nvqs
; queue_no
++) {
549 if (!virtio_queue_get_num(vdev
, queue_no
)) {
552 vector
= virtio_queue_vector(vdev
, queue_no
);
553 if (vector
>= msix_nr_vectors_allocated(dev
)) {
556 msg
= msix_get_message(dev
, vector
);
557 ret
= kvm_virtio_pci_vq_vector_use(proxy
, queue_no
, vector
, msg
);
561 /* If guest supports masking, set up irqfd now.
562 * Otherwise, delay until unmasked in the frontend.
564 if (proxy
->vdev
->guest_notifier_mask
) {
565 ret
= kvm_virtio_pci_irqfd_use(proxy
, queue_no
, vector
);
567 kvm_virtio_pci_vq_vector_release(proxy
, vector
);
575 while (--queue_no
>= 0) {
576 vector
= virtio_queue_vector(vdev
, queue_no
);
577 if (vector
>= msix_nr_vectors_allocated(dev
)) {
580 if (proxy
->vdev
->guest_notifier_mask
) {
581 kvm_virtio_pci_irqfd_release(proxy
, queue_no
, vector
);
583 kvm_virtio_pci_vq_vector_release(proxy
, vector
);
588 static void kvm_virtio_pci_vector_release(VirtIOPCIProxy
*proxy
, int nvqs
)
590 PCIDevice
*dev
= &proxy
->pci_dev
;
591 VirtIODevice
*vdev
= proxy
->vdev
;
595 for (queue_no
= 0; queue_no
< nvqs
; queue_no
++) {
596 if (!virtio_queue_get_num(vdev
, queue_no
)) {
599 vector
= virtio_queue_vector(vdev
, queue_no
);
600 if (vector
>= msix_nr_vectors_allocated(dev
)) {
603 /* If guest supports masking, clean up irqfd now.
604 * Otherwise, it was cleaned when masked in the frontend.
606 if (proxy
->vdev
->guest_notifier_mask
) {
607 kvm_virtio_pci_irqfd_release(proxy
, queue_no
, vector
);
609 kvm_virtio_pci_vq_vector_release(proxy
, vector
);
613 static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy
*proxy
,
614 unsigned int queue_no
,
618 VirtQueue
*vq
= virtio_get_queue(proxy
->vdev
, queue_no
);
619 EventNotifier
*n
= virtio_queue_get_guest_notifier(vq
);
623 if (proxy
->vector_irqfd
) {
624 irqfd
= &proxy
->vector_irqfd
[vector
];
625 if (irqfd
->msg
.data
!= msg
.data
|| irqfd
->msg
.address
!= msg
.address
) {
626 ret
= kvm_irqchip_update_msi_route(kvm_state
, irqfd
->virq
, msg
);
633 /* If guest supports masking, irqfd is already setup, unmask it.
634 * Otherwise, set it up now.
636 if (proxy
->vdev
->guest_notifier_mask
) {
637 proxy
->vdev
->guest_notifier_mask(proxy
->vdev
, queue_no
, false);
638 /* Test after unmasking to avoid losing events. */
639 if (proxy
->vdev
->guest_notifier_pending
&&
640 proxy
->vdev
->guest_notifier_pending(proxy
->vdev
, queue_no
)) {
641 event_notifier_set(n
);
644 ret
= kvm_virtio_pci_irqfd_use(proxy
, queue_no
, vector
);
649 static void virtio_pci_vq_vector_mask(VirtIOPCIProxy
*proxy
,
650 unsigned int queue_no
,
653 /* If guest supports masking, keep irqfd but mask it.
654 * Otherwise, clean it up now.
656 if (proxy
->vdev
->guest_notifier_mask
) {
657 proxy
->vdev
->guest_notifier_mask(proxy
->vdev
, queue_no
, true);
659 kvm_virtio_pci_irqfd_release(proxy
, queue_no
, vector
);
663 static int virtio_pci_vector_unmask(PCIDevice
*dev
, unsigned vector
,
666 VirtIOPCIProxy
*proxy
= container_of(dev
, VirtIOPCIProxy
, pci_dev
);
667 VirtIODevice
*vdev
= proxy
->vdev
;
670 for (queue_no
= 0; queue_no
< proxy
->nvqs_with_notifiers
; queue_no
++) {
671 if (!virtio_queue_get_num(vdev
, queue_no
)) {
674 if (virtio_queue_vector(vdev
, queue_no
) != vector
) {
677 ret
= virtio_pci_vq_vector_unmask(proxy
, queue_no
, vector
, msg
);
685 while (--queue_no
>= 0) {
686 if (virtio_queue_vector(vdev
, queue_no
) != vector
) {
689 virtio_pci_vq_vector_mask(proxy
, queue_no
, vector
);
694 static void virtio_pci_vector_mask(PCIDevice
*dev
, unsigned vector
)
696 VirtIOPCIProxy
*proxy
= container_of(dev
, VirtIOPCIProxy
, pci_dev
);
697 VirtIODevice
*vdev
= proxy
->vdev
;
700 for (queue_no
= 0; queue_no
< proxy
->nvqs_with_notifiers
; queue_no
++) {
701 if (!virtio_queue_get_num(vdev
, queue_no
)) {
704 if (virtio_queue_vector(vdev
, queue_no
) != vector
) {
707 virtio_pci_vq_vector_mask(proxy
, queue_no
, vector
);
711 static void virtio_pci_vector_poll(PCIDevice
*dev
,
712 unsigned int vector_start
,
713 unsigned int vector_end
)
715 VirtIOPCIProxy
*proxy
= container_of(dev
, VirtIOPCIProxy
, pci_dev
);
716 VirtIODevice
*vdev
= proxy
->vdev
;
719 EventNotifier
*notifier
;
722 for (queue_no
= 0; queue_no
< proxy
->nvqs_with_notifiers
; queue_no
++) {
723 if (!virtio_queue_get_num(vdev
, queue_no
)) {
726 vector
= virtio_queue_vector(vdev
, queue_no
);
727 if (vector
< vector_start
|| vector
>= vector_end
||
728 !msix_is_masked(dev
, vector
)) {
731 vq
= virtio_get_queue(vdev
, queue_no
);
732 notifier
= virtio_queue_get_guest_notifier(vq
);
733 if (vdev
->guest_notifier_pending
) {
734 if (vdev
->guest_notifier_pending(vdev
, queue_no
)) {
735 msix_set_pending(dev
, vector
);
737 } else if (event_notifier_test_and_clear(notifier
)) {
738 msix_set_pending(dev
, vector
);
743 static int virtio_pci_set_guest_notifier(DeviceState
*d
, int n
, bool assign
,
746 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
747 VirtQueue
*vq
= virtio_get_queue(proxy
->vdev
, n
);
748 EventNotifier
*notifier
= virtio_queue_get_guest_notifier(vq
);
751 int r
= event_notifier_init(notifier
, 0);
755 virtio_queue_set_guest_notifier_fd_handler(vq
, true, with_irqfd
);
757 virtio_queue_set_guest_notifier_fd_handler(vq
, false, with_irqfd
);
758 event_notifier_cleanup(notifier
);
764 static bool virtio_pci_query_guest_notifiers(DeviceState
*d
)
766 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
767 return msix_enabled(&proxy
->pci_dev
);
770 static int virtio_pci_set_guest_notifiers(DeviceState
*d
, int nvqs
, bool assign
)
772 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
773 VirtIODevice
*vdev
= proxy
->vdev
;
775 bool with_irqfd
= msix_enabled(&proxy
->pci_dev
) &&
776 kvm_msi_via_irqfd_enabled();
778 nvqs
= MIN(nvqs
, VIRTIO_PCI_QUEUE_MAX
);
780 /* When deassigning, pass a consistent nvqs value
781 * to avoid leaking notifiers.
783 assert(assign
|| nvqs
== proxy
->nvqs_with_notifiers
);
785 proxy
->nvqs_with_notifiers
= nvqs
;
787 /* Must unset vector notifier while guest notifier is still assigned */
788 if ((proxy
->vector_irqfd
|| vdev
->guest_notifier_mask
) && !assign
) {
789 msix_unset_vector_notifiers(&proxy
->pci_dev
);
790 if (proxy
->vector_irqfd
) {
791 kvm_virtio_pci_vector_release(proxy
, nvqs
);
792 g_free(proxy
->vector_irqfd
);
793 proxy
->vector_irqfd
= NULL
;
797 for (n
= 0; n
< nvqs
; n
++) {
798 if (!virtio_queue_get_num(vdev
, n
)) {
802 r
= virtio_pci_set_guest_notifier(d
, n
, assign
,
803 kvm_msi_via_irqfd_enabled());
809 /* Must set vector notifier after guest notifier has been assigned */
810 if ((with_irqfd
|| vdev
->guest_notifier_mask
) && assign
) {
812 proxy
->vector_irqfd
=
813 g_malloc0(sizeof(*proxy
->vector_irqfd
) *
814 msix_nr_vectors_allocated(&proxy
->pci_dev
));
815 r
= kvm_virtio_pci_vector_use(proxy
, nvqs
);
820 r
= msix_set_vector_notifiers(&proxy
->pci_dev
,
821 virtio_pci_vector_unmask
,
822 virtio_pci_vector_mask
,
823 virtio_pci_vector_poll
);
825 goto notifiers_error
;
834 kvm_virtio_pci_vector_release(proxy
, nvqs
);
838 /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
841 virtio_pci_set_guest_notifier(d
, n
, !assign
, with_irqfd
);
846 static int virtio_pci_set_host_notifier(DeviceState
*d
, int n
, bool assign
)
848 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
850 /* Stop using ioeventfd for virtqueue kick if the device starts using host
851 * notifiers. This makes it easy to avoid stepping on each others' toes.
853 proxy
->ioeventfd_disabled
= assign
;
855 virtio_pci_stop_ioeventfd(proxy
);
857 /* We don't need to start here: it's not needed because backend
858 * currently only stops on status change away from ok,
859 * reset, vmstop and such. If we do add code to start here,
860 * need to check vmstate, device state etc. */
861 return virtio_pci_set_host_notifier_internal(proxy
, n
, assign
, false);
864 static void virtio_pci_vmstate_change(DeviceState
*d
, bool running
)
866 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
869 /* Try to find out if the guest has bus master disabled, but is
870 in ready state. Then we have a buggy guest OS. */
871 if ((proxy
->vdev
->status
& VIRTIO_CONFIG_S_DRIVER_OK
) &&
872 !(proxy
->pci_dev
.config
[PCI_COMMAND
] & PCI_COMMAND_MASTER
)) {
873 proxy
->flags
|= VIRTIO_PCI_FLAG_BUS_MASTER_BUG
;
875 virtio_pci_start_ioeventfd(proxy
);
877 virtio_pci_stop_ioeventfd(proxy
);
881 static const VirtIOBindings virtio_pci_bindings
= {
882 .notify
= virtio_pci_notify
,
883 .save_config
= virtio_pci_save_config
,
884 .load_config
= virtio_pci_load_config
,
885 .save_queue
= virtio_pci_save_queue
,
886 .load_queue
= virtio_pci_load_queue
,
887 .get_features
= virtio_pci_get_features
,
888 .query_guest_notifiers
= virtio_pci_query_guest_notifiers
,
889 .set_host_notifier
= virtio_pci_set_host_notifier
,
890 .set_guest_notifiers
= virtio_pci_set_guest_notifiers
,
891 .vmstate_change
= virtio_pci_vmstate_change
,
894 void virtio_init_pci(VirtIOPCIProxy
*proxy
, VirtIODevice
*vdev
)
901 config
= proxy
->pci_dev
.config
;
903 if (proxy
->class_code
) {
904 pci_config_set_class(config
, proxy
->class_code
);
906 pci_set_word(config
+ PCI_SUBSYSTEM_VENDOR_ID
,
907 pci_get_word(config
+ PCI_VENDOR_ID
));
908 pci_set_word(config
+ PCI_SUBSYSTEM_ID
, vdev
->device_id
);
909 config
[PCI_INTERRUPT_PIN
] = 1;
911 if (vdev
->nvectors
&&
912 msix_init_exclusive_bar(&proxy
->pci_dev
, vdev
->nvectors
, 1)) {
916 proxy
->pci_dev
.config_write
= virtio_write_config
;
918 size
= VIRTIO_PCI_REGION_SIZE(&proxy
->pci_dev
) + vdev
->config_len
;
920 size
= 1 << qemu_fls(size
);
922 memory_region_init_io(&proxy
->bar
, &virtio_pci_config_ops
, proxy
,
924 pci_register_bar(&proxy
->pci_dev
, 0, PCI_BASE_ADDRESS_SPACE_IO
,
927 if (!kvm_has_many_ioeventfds()) {
928 proxy
->flags
&= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD
;
931 virtio_bind_device(vdev
, &virtio_pci_bindings
, DEVICE(proxy
));
932 proxy
->host_features
|= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY
;
933 proxy
->host_features
|= 0x1 << VIRTIO_F_BAD_FEATURE
;
934 proxy
->host_features
= vdev
->get_features(vdev
, proxy
->host_features
);
937 static void virtio_exit_pci(PCIDevice
*pci_dev
)
939 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
941 memory_region_destroy(&proxy
->bar
);
942 msix_uninit_exclusive_bar(pci_dev
);
945 static int virtio_net_init_pci(PCIDevice
*pci_dev
)
947 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
950 vdev
= virtio_net_init(&pci_dev
->qdev
, &proxy
->nic
, &proxy
->net
,
951 proxy
->host_features
);
953 vdev
->nvectors
= proxy
->nvectors
;
954 virtio_init_pci(proxy
, vdev
);
956 /* make the actual value visible */
957 proxy
->nvectors
= vdev
->nvectors
;
961 static void virtio_net_exit_pci(PCIDevice
*pci_dev
)
963 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
965 virtio_pci_stop_ioeventfd(proxy
);
966 virtio_net_exit(proxy
->vdev
);
967 virtio_exit_pci(pci_dev
);
970 static int virtio_rng_init_pci(PCIDevice
*pci_dev
)
972 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
975 if (proxy
->rng
.rng
== NULL
) {
976 proxy
->rng
.default_backend
= RNG_RANDOM(object_new(TYPE_RNG_RANDOM
));
978 object_property_add_child(OBJECT(pci_dev
),
980 OBJECT(proxy
->rng
.default_backend
),
983 object_property_set_link(OBJECT(pci_dev
),
984 OBJECT(proxy
->rng
.default_backend
),
988 vdev
= virtio_rng_init(&pci_dev
->qdev
, &proxy
->rng
);
992 virtio_init_pci(proxy
, vdev
);
996 static void virtio_rng_exit_pci(PCIDevice
*pci_dev
)
998 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
1000 virtio_pci_stop_ioeventfd(proxy
);
1001 virtio_rng_exit(proxy
->vdev
);
1002 virtio_exit_pci(pci_dev
);
1005 static Property virtio_net_properties
[] = {
1006 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, false),
1007 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
, 3),
1008 DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy
, host_features
),
1009 DEFINE_NIC_PROPERTIES(VirtIOPCIProxy
, nic
),
1010 DEFINE_PROP_UINT32("x-txtimer", VirtIOPCIProxy
, net
.txtimer
, TX_TIMER_INTERVAL
),
1011 DEFINE_PROP_INT32("x-txburst", VirtIOPCIProxy
, net
.txburst
, TX_BURST
),
1012 DEFINE_PROP_STRING("tx", VirtIOPCIProxy
, net
.tx
),
1013 DEFINE_PROP_END_OF_LIST(),
1016 static void virtio_net_class_init(ObjectClass
*klass
, void *data
)
1018 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1019 PCIDeviceClass
*k
= PCI_DEVICE_CLASS(klass
);
1021 k
->init
= virtio_net_init_pci
;
1022 k
->exit
= virtio_net_exit_pci
;
1023 k
->romfile
= "efi-virtio.rom";
1024 k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1025 k
->device_id
= PCI_DEVICE_ID_VIRTIO_NET
;
1026 k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1027 k
->class_id
= PCI_CLASS_NETWORK_ETHERNET
;
1028 dc
->reset
= virtio_pci_reset
;
1029 dc
->props
= virtio_net_properties
;
1032 static const TypeInfo virtio_net_info
= {
1033 .name
= "virtio-net-pci",
1034 .parent
= TYPE_PCI_DEVICE
,
1035 .instance_size
= sizeof(VirtIOPCIProxy
),
1036 .class_init
= virtio_net_class_init
,
1039 static void virtio_rng_initfn(Object
*obj
)
1041 PCIDevice
*pci_dev
= PCI_DEVICE(obj
);
1042 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
1044 object_property_add_link(obj
, "rng", TYPE_RNG_BACKEND
,
1045 (Object
**)&proxy
->rng
.rng
, NULL
);
1048 static Property virtio_rng_properties
[] = {
1049 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy
, host_features
),
1050 /* Set a default rate limit of 2^47 bytes per minute or roughly 2TB/s. If
1051 you have an entropy source capable of generating more entropy than this
1052 and you can pass it through via virtio-rng, then hats off to you. Until
1053 then, this is unlimited for all practical purposes.
1055 DEFINE_PROP_UINT64("max-bytes", VirtIOPCIProxy
, rng
.max_bytes
, INT64_MAX
),
1056 DEFINE_PROP_UINT32("period", VirtIOPCIProxy
, rng
.period_ms
, 1 << 16),
1057 DEFINE_PROP_END_OF_LIST(),
1060 static void virtio_rng_class_init(ObjectClass
*klass
, void *data
)
1062 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1063 PCIDeviceClass
*k
= PCI_DEVICE_CLASS(klass
);
1065 k
->init
= virtio_rng_init_pci
;
1066 k
->exit
= virtio_rng_exit_pci
;
1067 k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1068 k
->device_id
= PCI_DEVICE_ID_VIRTIO_RNG
;
1069 k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1070 k
->class_id
= PCI_CLASS_OTHERS
;
1071 dc
->reset
= virtio_pci_reset
;
1072 dc
->props
= virtio_rng_properties
;
1075 static const TypeInfo virtio_rng_info
= {
1076 .name
= "virtio-rng-pci",
1077 .parent
= TYPE_PCI_DEVICE
,
1078 .instance_size
= sizeof(VirtIOPCIProxy
),
1079 .instance_init
= virtio_rng_initfn
,
1080 .class_init
= virtio_rng_class_init
,
1083 #ifdef CONFIG_VIRTFS
1084 static int virtio_9p_init_pci(PCIDevice
*pci_dev
)
1086 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
1089 vdev
= virtio_9p_init(&pci_dev
->qdev
, &proxy
->fsconf
);
1090 vdev
->nvectors
= proxy
->nvectors
;
1091 virtio_init_pci(proxy
, vdev
);
1092 /* make the actual value visible */
1093 proxy
->nvectors
= vdev
->nvectors
;
1097 static Property virtio_9p_properties
[] = {
1098 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, true),
1099 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
, 2),
1100 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy
, host_features
),
1101 DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy
, fsconf
.tag
),
1102 DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy
, fsconf
.fsdev_id
),
1103 DEFINE_PROP_END_OF_LIST(),
1106 static void virtio_9p_class_init(ObjectClass
*klass
, void *data
)
1108 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1109 PCIDeviceClass
*k
= PCI_DEVICE_CLASS(klass
);
1111 k
->init
= virtio_9p_init_pci
;
1112 k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1113 k
->device_id
= PCI_DEVICE_ID_VIRTIO_9P
;
1114 k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1116 dc
->props
= virtio_9p_properties
;
1117 dc
->reset
= virtio_pci_reset
;
1120 static const TypeInfo virtio_9p_info
= {
1121 .name
= "virtio-9p-pci",
1122 .parent
= TYPE_PCI_DEVICE
,
1123 .instance_size
= sizeof(VirtIOPCIProxy
),
1124 .class_init
= virtio_9p_class_init
,
1129 * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
1132 /* This is called by virtio-bus just after the device is plugged. */
1133 static void virtio_pci_device_plugged(DeviceState
*d
)
1135 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(d
);
1136 VirtioBusState
*bus
= &proxy
->bus
;
1140 proxy
->vdev
= bus
->vdev
;
1142 config
= proxy
->pci_dev
.config
;
1143 if (proxy
->class_code
) {
1144 pci_config_set_class(config
, proxy
->class_code
);
1146 pci_set_word(config
+ PCI_SUBSYSTEM_VENDOR_ID
,
1147 pci_get_word(config
+ PCI_VENDOR_ID
));
1148 pci_set_word(config
+ PCI_SUBSYSTEM_ID
, virtio_bus_get_vdev_id(bus
));
1149 config
[PCI_INTERRUPT_PIN
] = 1;
1151 if (proxy
->nvectors
&&
1152 msix_init_exclusive_bar(&proxy
->pci_dev
, proxy
->nvectors
, 1)) {
1153 proxy
->nvectors
= 0;
1156 proxy
->pci_dev
.config_write
= virtio_write_config
;
1158 size
= VIRTIO_PCI_REGION_SIZE(&proxy
->pci_dev
)
1159 + virtio_bus_get_vdev_config_len(bus
);
1160 if (size
& (size
- 1)) {
1161 size
= 1 << qemu_fls(size
);
1164 memory_region_init_io(&proxy
->bar
, &virtio_pci_config_ops
, proxy
,
1165 "virtio-pci", size
);
1166 pci_register_bar(&proxy
->pci_dev
, 0, PCI_BASE_ADDRESS_SPACE_IO
,
1169 if (!kvm_has_many_ioeventfds()) {
1170 proxy
->flags
&= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD
;
1173 proxy
->host_features
|= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY
;
1174 proxy
->host_features
|= 0x1 << VIRTIO_F_BAD_FEATURE
;
1175 proxy
->host_features
= virtio_bus_get_vdev_features(bus
,
1176 proxy
->host_features
);
1179 static int virtio_pci_init(PCIDevice
*pci_dev
)
1181 VirtIOPCIProxy
*dev
= VIRTIO_PCI(pci_dev
);
1182 VirtioPCIClass
*k
= VIRTIO_PCI_GET_CLASS(pci_dev
);
1183 virtio_pci_bus_new(&dev
->bus
, dev
);
1184 if (k
->init
!= NULL
) {
1185 return k
->init(dev
);
1190 static void virtio_pci_exit(PCIDevice
*pci_dev
)
1192 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(pci_dev
);
1193 virtio_pci_stop_ioeventfd(proxy
);
1194 virtio_exit_pci(pci_dev
);
1198 * This will be renamed virtio_pci_reset at the end of the series.
1199 * virtio_pci_reset is still in use at this moment.
1201 static void virtio_pci_rst(DeviceState
*qdev
)
1203 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(qdev
);
1204 VirtioBusState
*bus
= VIRTIO_BUS(&proxy
->bus
);
1205 virtio_pci_stop_ioeventfd(proxy
);
1206 virtio_bus_reset(bus
);
1207 msix_unuse_all_vectors(&proxy
->pci_dev
);
1208 proxy
->flags
&= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG
;
1211 static void virtio_pci_class_init(ObjectClass
*klass
, void *data
)
1213 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1214 PCIDeviceClass
*k
= PCI_DEVICE_CLASS(klass
);
1216 k
->init
= virtio_pci_init
;
1217 k
->exit
= virtio_pci_exit
;
1218 k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1219 k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1220 k
->class_id
= PCI_CLASS_OTHERS
;
1221 dc
->reset
= virtio_pci_rst
;
1224 static const TypeInfo virtio_pci_info
= {
1225 .name
= TYPE_VIRTIO_PCI
,
1226 .parent
= TYPE_PCI_DEVICE
,
1227 .instance_size
= sizeof(VirtIOPCIProxy
),
1228 .class_init
= virtio_pci_class_init
,
1229 .class_size
= sizeof(VirtioPCIClass
),
1233 /* virtio-blk-pci */
1235 static Property virtio_blk_pci_properties
[] = {
1236 DEFINE_PROP_HEX32("class", VirtIOPCIProxy
, class_code
, 0),
1237 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
,
1238 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, true),
1239 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
, 2),
1240 #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
1241 DEFINE_PROP_BIT("x-data-plane", VirtIOBlkPCI
, blk
.data_plane
, 0, false),
1243 DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy
, host_features
),
1244 DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkPCI
, blk
),
1245 DEFINE_PROP_END_OF_LIST(),
1248 static int virtio_blk_pci_init(VirtIOPCIProxy
*vpci_dev
)
1250 VirtIOBlkPCI
*dev
= VIRTIO_BLK_PCI(vpci_dev
);
1251 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
1252 virtio_blk_set_conf(vdev
, &(dev
->blk
));
1253 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
1254 if (qdev_init(vdev
) < 0) {
1260 static void virtio_blk_pci_class_init(ObjectClass
*klass
, void *data
)
1262 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1263 VirtioPCIClass
*k
= VIRTIO_PCI_CLASS(klass
);
1264 PCIDeviceClass
*pcidev_k
= PCI_DEVICE_CLASS(klass
);
1266 dc
->props
= virtio_blk_pci_properties
;
1267 k
->init
= virtio_blk_pci_init
;
1268 pcidev_k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1269 pcidev_k
->device_id
= PCI_DEVICE_ID_VIRTIO_BLOCK
;
1270 pcidev_k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1271 pcidev_k
->class_id
= PCI_CLASS_STORAGE_SCSI
;
1274 static void virtio_blk_pci_instance_init(Object
*obj
)
1276 VirtIOBlkPCI
*dev
= VIRTIO_BLK_PCI(obj
);
1277 object_initialize(OBJECT(&dev
->vdev
), TYPE_VIRTIO_BLK
);
1278 object_property_add_child(obj
, "virtio-backend", OBJECT(&dev
->vdev
), NULL
);
1281 static const TypeInfo virtio_blk_pci_info
= {
1282 .name
= TYPE_VIRTIO_BLK_PCI
,
1283 .parent
= TYPE_VIRTIO_PCI
,
1284 .instance_size
= sizeof(VirtIOBlkPCI
),
1285 .instance_init
= virtio_blk_pci_instance_init
,
1286 .class_init
= virtio_blk_pci_class_init
,
1289 /* virtio-scsi-pci */
1291 static Property virtio_scsi_pci_properties
[] = {
1292 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
,
1293 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, true),
1294 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
,
1295 DEV_NVECTORS_UNSPECIFIED
),
1296 DEFINE_VIRTIO_SCSI_FEATURES(VirtIOPCIProxy
, host_features
),
1297 DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSIPCI
, vdev
.conf
),
1298 DEFINE_PROP_END_OF_LIST(),
1301 static int virtio_scsi_pci_init_pci(VirtIOPCIProxy
*vpci_dev
)
1303 VirtIOSCSIPCI
*dev
= VIRTIO_SCSI_PCI(vpci_dev
);
1304 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
1306 if (vpci_dev
->nvectors
== DEV_NVECTORS_UNSPECIFIED
) {
1307 vpci_dev
->nvectors
= dev
->vdev
.conf
.num_queues
+ 3;
1310 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
1311 if (qdev_init(vdev
) < 0) {
1317 static void virtio_scsi_pci_class_init(ObjectClass
*klass
, void *data
)
1319 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1320 VirtioPCIClass
*k
= VIRTIO_PCI_CLASS(klass
);
1321 PCIDeviceClass
*pcidev_k
= PCI_DEVICE_CLASS(klass
);
1322 k
->init
= virtio_scsi_pci_init_pci
;
1323 dc
->props
= virtio_scsi_pci_properties
;
1324 pcidev_k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1325 pcidev_k
->device_id
= PCI_DEVICE_ID_VIRTIO_SCSI
;
1326 pcidev_k
->revision
= 0x00;
1327 pcidev_k
->class_id
= PCI_CLASS_STORAGE_SCSI
;
1330 static void virtio_scsi_pci_instance_init(Object
*obj
)
1332 VirtIOSCSIPCI
*dev
= VIRTIO_SCSI_PCI(obj
);
1333 object_initialize(OBJECT(&dev
->vdev
), TYPE_VIRTIO_SCSI
);
1334 object_property_add_child(obj
, "virtio-backend", OBJECT(&dev
->vdev
), NULL
);
1337 static const TypeInfo virtio_scsi_pci_info
= {
1338 .name
= TYPE_VIRTIO_SCSI_PCI
,
1339 .parent
= TYPE_VIRTIO_PCI
,
1340 .instance_size
= sizeof(VirtIOSCSIPCI
),
1341 .instance_init
= virtio_scsi_pci_instance_init
,
1342 .class_init
= virtio_scsi_pci_class_init
,
1345 /* virtio-balloon-pci */
1347 static Property virtio_balloon_pci_properties
[] = {
1348 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy
, host_features
),
1349 DEFINE_PROP_HEX32("class", VirtIOPCIProxy
, class_code
, 0),
1350 DEFINE_PROP_END_OF_LIST(),
1353 static int virtio_balloon_pci_init(VirtIOPCIProxy
*vpci_dev
)
1355 VirtIOBalloonPCI
*dev
= VIRTIO_BALLOON_PCI(vpci_dev
);
1356 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
1358 if (vpci_dev
->class_code
!= PCI_CLASS_OTHERS
&&
1359 vpci_dev
->class_code
!= PCI_CLASS_MEMORY_RAM
) { /* qemu < 1.1 */
1360 vpci_dev
->class_code
= PCI_CLASS_OTHERS
;
1363 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
1364 if (qdev_init(vdev
) < 0) {
1370 static void virtio_balloon_pci_class_init(ObjectClass
*klass
, void *data
)
1372 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1373 VirtioPCIClass
*k
= VIRTIO_PCI_CLASS(klass
);
1374 PCIDeviceClass
*pcidev_k
= PCI_DEVICE_CLASS(klass
);
1375 k
->init
= virtio_balloon_pci_init
;
1376 dc
->props
= virtio_balloon_pci_properties
;
1377 pcidev_k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1378 pcidev_k
->device_id
= PCI_DEVICE_ID_VIRTIO_BALLOON
;
1379 pcidev_k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1380 pcidev_k
->class_id
= PCI_CLASS_OTHERS
;
1383 static void virtio_balloon_pci_instance_init(Object
*obj
)
1385 VirtIOBalloonPCI
*dev
= VIRTIO_BALLOON_PCI(obj
);
1386 object_initialize(OBJECT(&dev
->vdev
), TYPE_VIRTIO_BALLOON
);
1387 object_property_add_child(obj
, "virtio-backend", OBJECT(&dev
->vdev
), NULL
);
1390 static const TypeInfo virtio_balloon_pci_info
= {
1391 .name
= TYPE_VIRTIO_BALLOON_PCI
,
1392 .parent
= TYPE_VIRTIO_PCI
,
1393 .instance_size
= sizeof(VirtIOBalloonPCI
),
1394 .instance_init
= virtio_balloon_pci_instance_init
,
1395 .class_init
= virtio_balloon_pci_class_init
,
1398 /* virtio-serial-pci */
1400 static int virtio_serial_pci_init(VirtIOPCIProxy
*vpci_dev
)
1402 VirtIOSerialPCI
*dev
= VIRTIO_SERIAL_PCI(vpci_dev
);
1403 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
1405 if (vpci_dev
->class_code
!= PCI_CLASS_COMMUNICATION_OTHER
&&
1406 vpci_dev
->class_code
!= PCI_CLASS_DISPLAY_OTHER
&& /* qemu 0.10 */
1407 vpci_dev
->class_code
!= PCI_CLASS_OTHERS
) { /* qemu-kvm */
1408 vpci_dev
->class_code
= PCI_CLASS_COMMUNICATION_OTHER
;
1411 /* backwards-compatibility with machines that were created with
1412 DEV_NVECTORS_UNSPECIFIED */
1413 if (vpci_dev
->nvectors
== DEV_NVECTORS_UNSPECIFIED
) {
1414 vpci_dev
->nvectors
= dev
->vdev
.serial
.max_virtserial_ports
+ 1;
1417 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
1418 if (qdev_init(vdev
) < 0) {
1424 static Property virtio_serial_pci_properties
[] = {
1425 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
,
1426 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, true),
1427 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
, 2),
1428 DEFINE_PROP_HEX32("class", VirtIOPCIProxy
, class_code
, 0),
1429 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy
, host_features
),
1430 DEFINE_VIRTIO_SERIAL_PROPERTIES(VirtIOSerialPCI
, vdev
.serial
),
1431 DEFINE_PROP_END_OF_LIST(),
1434 static void virtio_serial_pci_class_init(ObjectClass
*klass
, void *data
)
1436 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1437 VirtioPCIClass
*k
= VIRTIO_PCI_CLASS(klass
);
1438 PCIDeviceClass
*pcidev_k
= PCI_DEVICE_CLASS(klass
);
1439 k
->init
= virtio_serial_pci_init
;
1440 dc
->props
= virtio_serial_pci_properties
;
1441 pcidev_k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1442 pcidev_k
->device_id
= PCI_DEVICE_ID_VIRTIO_CONSOLE
;
1443 pcidev_k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1444 pcidev_k
->class_id
= PCI_CLASS_COMMUNICATION_OTHER
;
1447 static void virtio_serial_pci_instance_init(Object
*obj
)
1449 VirtIOSerialPCI
*dev
= VIRTIO_SERIAL_PCI(obj
);
1450 object_initialize(OBJECT(&dev
->vdev
), TYPE_VIRTIO_SERIAL
);
1451 object_property_add_child(obj
, "virtio-backend", OBJECT(&dev
->vdev
), NULL
);
1454 static const TypeInfo virtio_serial_pci_info
= {
1455 .name
= TYPE_VIRTIO_SERIAL_PCI
,
1456 .parent
= TYPE_VIRTIO_PCI
,
1457 .instance_size
= sizeof(VirtIOSerialPCI
),
1458 .instance_init
= virtio_serial_pci_instance_init
,
1459 .class_init
= virtio_serial_pci_class_init
,
1462 /* virtio-pci-bus */
1464 void virtio_pci_bus_new(VirtioBusState
*bus
, VirtIOPCIProxy
*dev
)
1466 DeviceState
*qdev
= DEVICE(dev
);
1468 qbus_create_inplace((BusState
*)bus
, TYPE_VIRTIO_PCI_BUS
, qdev
, NULL
);
1470 qbus
->allow_hotplug
= 1;
1473 static void virtio_pci_bus_class_init(ObjectClass
*klass
, void *data
)
1475 BusClass
*bus_class
= BUS_CLASS(klass
);
1476 VirtioBusClass
*k
= VIRTIO_BUS_CLASS(klass
);
1477 bus_class
->max_dev
= 1;
1478 k
->notify
= virtio_pci_notify
;
1479 k
->save_config
= virtio_pci_save_config
;
1480 k
->load_config
= virtio_pci_load_config
;
1481 k
->save_queue
= virtio_pci_save_queue
;
1482 k
->load_queue
= virtio_pci_load_queue
;
1483 k
->get_features
= virtio_pci_get_features
;
1484 k
->query_guest_notifiers
= virtio_pci_query_guest_notifiers
;
1485 k
->set_host_notifier
= virtio_pci_set_host_notifier
;
1486 k
->set_guest_notifiers
= virtio_pci_set_guest_notifiers
;
1487 k
->vmstate_change
= virtio_pci_vmstate_change
;
1488 k
->device_plugged
= virtio_pci_device_plugged
;
1491 static const TypeInfo virtio_pci_bus_info
= {
1492 .name
= TYPE_VIRTIO_PCI_BUS
,
1493 .parent
= TYPE_VIRTIO_BUS
,
1494 .instance_size
= sizeof(VirtioPCIBusState
),
1495 .class_init
= virtio_pci_bus_class_init
,
1498 static void virtio_pci_register_types(void)
1500 type_register_static(&virtio_net_info
);
1501 type_register_static(&virtio_rng_info
);
1502 type_register_static(&virtio_pci_bus_info
);
1503 type_register_static(&virtio_pci_info
);
1504 #ifdef CONFIG_VIRTFS
1505 type_register_static(&virtio_9p_info
);
1507 type_register_static(&virtio_blk_pci_info
);
1508 type_register_static(&virtio_scsi_pci_info
);
1509 type_register_static(&virtio_balloon_pci_info
);
1510 type_register_static(&virtio_serial_pci_info
);
1513 type_init(virtio_pci_register_types
)