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_serial_init_pci(PCIDevice
*pci_dev
)
947 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
950 if (proxy
->class_code
!= PCI_CLASS_COMMUNICATION_OTHER
&&
951 proxy
->class_code
!= PCI_CLASS_DISPLAY_OTHER
&& /* qemu 0.10 */
952 proxy
->class_code
!= PCI_CLASS_OTHERS
) /* qemu-kvm */
953 proxy
->class_code
= PCI_CLASS_COMMUNICATION_OTHER
;
955 vdev
= virtio_serial_init(&pci_dev
->qdev
, &proxy
->serial
);
960 /* backwards-compatibility with machines that were created with
961 DEV_NVECTORS_UNSPECIFIED */
962 vdev
->nvectors
= proxy
->nvectors
== DEV_NVECTORS_UNSPECIFIED
963 ? proxy
->serial
.max_virtserial_ports
+ 1
965 virtio_init_pci(proxy
, vdev
);
966 proxy
->nvectors
= vdev
->nvectors
;
970 static void virtio_serial_exit_pci(PCIDevice
*pci_dev
)
972 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
974 virtio_pci_stop_ioeventfd(proxy
);
975 virtio_serial_exit(proxy
->vdev
);
976 virtio_exit_pci(pci_dev
);
979 static int virtio_net_init_pci(PCIDevice
*pci_dev
)
981 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
984 vdev
= virtio_net_init(&pci_dev
->qdev
, &proxy
->nic
, &proxy
->net
,
985 proxy
->host_features
);
987 vdev
->nvectors
= proxy
->nvectors
;
988 virtio_init_pci(proxy
, vdev
);
990 /* make the actual value visible */
991 proxy
->nvectors
= vdev
->nvectors
;
995 static void virtio_net_exit_pci(PCIDevice
*pci_dev
)
997 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
999 virtio_pci_stop_ioeventfd(proxy
);
1000 virtio_net_exit(proxy
->vdev
);
1001 virtio_exit_pci(pci_dev
);
1004 static int virtio_rng_init_pci(PCIDevice
*pci_dev
)
1006 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
1009 if (proxy
->rng
.rng
== NULL
) {
1010 proxy
->rng
.default_backend
= RNG_RANDOM(object_new(TYPE_RNG_RANDOM
));
1012 object_property_add_child(OBJECT(pci_dev
),
1014 OBJECT(proxy
->rng
.default_backend
),
1017 object_property_set_link(OBJECT(pci_dev
),
1018 OBJECT(proxy
->rng
.default_backend
),
1022 vdev
= virtio_rng_init(&pci_dev
->qdev
, &proxy
->rng
);
1026 virtio_init_pci(proxy
, vdev
);
1030 static void virtio_rng_exit_pci(PCIDevice
*pci_dev
)
1032 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
1034 virtio_pci_stop_ioeventfd(proxy
);
1035 virtio_rng_exit(proxy
->vdev
);
1036 virtio_exit_pci(pci_dev
);
1039 static Property virtio_net_properties
[] = {
1040 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, false),
1041 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
, 3),
1042 DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy
, host_features
),
1043 DEFINE_NIC_PROPERTIES(VirtIOPCIProxy
, nic
),
1044 DEFINE_PROP_UINT32("x-txtimer", VirtIOPCIProxy
, net
.txtimer
, TX_TIMER_INTERVAL
),
1045 DEFINE_PROP_INT32("x-txburst", VirtIOPCIProxy
, net
.txburst
, TX_BURST
),
1046 DEFINE_PROP_STRING("tx", VirtIOPCIProxy
, net
.tx
),
1047 DEFINE_PROP_END_OF_LIST(),
1050 static void virtio_net_class_init(ObjectClass
*klass
, void *data
)
1052 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1053 PCIDeviceClass
*k
= PCI_DEVICE_CLASS(klass
);
1055 k
->init
= virtio_net_init_pci
;
1056 k
->exit
= virtio_net_exit_pci
;
1057 k
->romfile
= "efi-virtio.rom";
1058 k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1059 k
->device_id
= PCI_DEVICE_ID_VIRTIO_NET
;
1060 k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1061 k
->class_id
= PCI_CLASS_NETWORK_ETHERNET
;
1062 dc
->reset
= virtio_pci_reset
;
1063 dc
->props
= virtio_net_properties
;
1066 static const TypeInfo virtio_net_info
= {
1067 .name
= "virtio-net-pci",
1068 .parent
= TYPE_PCI_DEVICE
,
1069 .instance_size
= sizeof(VirtIOPCIProxy
),
1070 .class_init
= virtio_net_class_init
,
1073 static Property virtio_serial_properties
[] = {
1074 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, true),
1075 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
, 2),
1076 DEFINE_PROP_HEX32("class", VirtIOPCIProxy
, class_code
, 0),
1077 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy
, host_features
),
1078 DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy
, serial
.max_virtserial_ports
, 31),
1079 DEFINE_PROP_END_OF_LIST(),
1082 static void virtio_serial_class_init(ObjectClass
*klass
, void *data
)
1084 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1085 PCIDeviceClass
*k
= PCI_DEVICE_CLASS(klass
);
1087 k
->init
= virtio_serial_init_pci
;
1088 k
->exit
= virtio_serial_exit_pci
;
1089 k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1090 k
->device_id
= PCI_DEVICE_ID_VIRTIO_CONSOLE
;
1091 k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1092 k
->class_id
= PCI_CLASS_COMMUNICATION_OTHER
;
1093 dc
->reset
= virtio_pci_reset
;
1094 dc
->props
= virtio_serial_properties
;
1097 static const TypeInfo virtio_serial_info
= {
1098 .name
= "virtio-serial-pci",
1099 .parent
= TYPE_PCI_DEVICE
,
1100 .instance_size
= sizeof(VirtIOPCIProxy
),
1101 .class_init
= virtio_serial_class_init
,
1104 static void virtio_rng_initfn(Object
*obj
)
1106 PCIDevice
*pci_dev
= PCI_DEVICE(obj
);
1107 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
1109 object_property_add_link(obj
, "rng", TYPE_RNG_BACKEND
,
1110 (Object
**)&proxy
->rng
.rng
, NULL
);
1113 static Property virtio_rng_properties
[] = {
1114 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy
, host_features
),
1115 /* Set a default rate limit of 2^47 bytes per minute or roughly 2TB/s. If
1116 you have an entropy source capable of generating more entropy than this
1117 and you can pass it through via virtio-rng, then hats off to you. Until
1118 then, this is unlimited for all practical purposes.
1120 DEFINE_PROP_UINT64("max-bytes", VirtIOPCIProxy
, rng
.max_bytes
, INT64_MAX
),
1121 DEFINE_PROP_UINT32("period", VirtIOPCIProxy
, rng
.period_ms
, 1 << 16),
1122 DEFINE_PROP_END_OF_LIST(),
1125 static void virtio_rng_class_init(ObjectClass
*klass
, void *data
)
1127 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1128 PCIDeviceClass
*k
= PCI_DEVICE_CLASS(klass
);
1130 k
->init
= virtio_rng_init_pci
;
1131 k
->exit
= virtio_rng_exit_pci
;
1132 k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1133 k
->device_id
= PCI_DEVICE_ID_VIRTIO_RNG
;
1134 k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1135 k
->class_id
= PCI_CLASS_OTHERS
;
1136 dc
->reset
= virtio_pci_reset
;
1137 dc
->props
= virtio_rng_properties
;
1140 static const TypeInfo virtio_rng_info
= {
1141 .name
= "virtio-rng-pci",
1142 .parent
= TYPE_PCI_DEVICE
,
1143 .instance_size
= sizeof(VirtIOPCIProxy
),
1144 .instance_init
= virtio_rng_initfn
,
1145 .class_init
= virtio_rng_class_init
,
1148 #ifdef CONFIG_VIRTFS
1149 static int virtio_9p_init_pci(PCIDevice
*pci_dev
)
1151 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
1154 vdev
= virtio_9p_init(&pci_dev
->qdev
, &proxy
->fsconf
);
1155 vdev
->nvectors
= proxy
->nvectors
;
1156 virtio_init_pci(proxy
, vdev
);
1157 /* make the actual value visible */
1158 proxy
->nvectors
= vdev
->nvectors
;
1162 static Property virtio_9p_properties
[] = {
1163 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, true),
1164 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
, 2),
1165 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy
, host_features
),
1166 DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy
, fsconf
.tag
),
1167 DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy
, fsconf
.fsdev_id
),
1168 DEFINE_PROP_END_OF_LIST(),
1171 static void virtio_9p_class_init(ObjectClass
*klass
, void *data
)
1173 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1174 PCIDeviceClass
*k
= PCI_DEVICE_CLASS(klass
);
1176 k
->init
= virtio_9p_init_pci
;
1177 k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1178 k
->device_id
= PCI_DEVICE_ID_VIRTIO_9P
;
1179 k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1181 dc
->props
= virtio_9p_properties
;
1182 dc
->reset
= virtio_pci_reset
;
1185 static const TypeInfo virtio_9p_info
= {
1186 .name
= "virtio-9p-pci",
1187 .parent
= TYPE_PCI_DEVICE
,
1188 .instance_size
= sizeof(VirtIOPCIProxy
),
1189 .class_init
= virtio_9p_class_init
,
1194 * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
1197 /* This is called by virtio-bus just after the device is plugged. */
1198 static void virtio_pci_device_plugged(DeviceState
*d
)
1200 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(d
);
1201 VirtioBusState
*bus
= &proxy
->bus
;
1205 proxy
->vdev
= bus
->vdev
;
1207 config
= proxy
->pci_dev
.config
;
1208 if (proxy
->class_code
) {
1209 pci_config_set_class(config
, proxy
->class_code
);
1211 pci_set_word(config
+ PCI_SUBSYSTEM_VENDOR_ID
,
1212 pci_get_word(config
+ PCI_VENDOR_ID
));
1213 pci_set_word(config
+ PCI_SUBSYSTEM_ID
, virtio_bus_get_vdev_id(bus
));
1214 config
[PCI_INTERRUPT_PIN
] = 1;
1216 if (proxy
->nvectors
&&
1217 msix_init_exclusive_bar(&proxy
->pci_dev
, proxy
->nvectors
, 1)) {
1218 proxy
->nvectors
= 0;
1221 proxy
->pci_dev
.config_write
= virtio_write_config
;
1223 size
= VIRTIO_PCI_REGION_SIZE(&proxy
->pci_dev
)
1224 + virtio_bus_get_vdev_config_len(bus
);
1225 if (size
& (size
- 1)) {
1226 size
= 1 << qemu_fls(size
);
1229 memory_region_init_io(&proxy
->bar
, &virtio_pci_config_ops
, proxy
,
1230 "virtio-pci", size
);
1231 pci_register_bar(&proxy
->pci_dev
, 0, PCI_BASE_ADDRESS_SPACE_IO
,
1234 if (!kvm_has_many_ioeventfds()) {
1235 proxy
->flags
&= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD
;
1238 proxy
->host_features
|= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY
;
1239 proxy
->host_features
|= 0x1 << VIRTIO_F_BAD_FEATURE
;
1240 proxy
->host_features
= virtio_bus_get_vdev_features(bus
,
1241 proxy
->host_features
);
1244 static int virtio_pci_init(PCIDevice
*pci_dev
)
1246 VirtIOPCIProxy
*dev
= VIRTIO_PCI(pci_dev
);
1247 VirtioPCIClass
*k
= VIRTIO_PCI_GET_CLASS(pci_dev
);
1248 virtio_pci_bus_new(&dev
->bus
, dev
);
1249 if (k
->init
!= NULL
) {
1250 return k
->init(dev
);
1255 static void virtio_pci_exit(PCIDevice
*pci_dev
)
1257 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(pci_dev
);
1258 virtio_pci_stop_ioeventfd(proxy
);
1259 virtio_exit_pci(pci_dev
);
1263 * This will be renamed virtio_pci_reset at the end of the series.
1264 * virtio_pci_reset is still in use at this moment.
1266 static void virtio_pci_rst(DeviceState
*qdev
)
1268 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(qdev
);
1269 VirtioBusState
*bus
= VIRTIO_BUS(&proxy
->bus
);
1270 virtio_pci_stop_ioeventfd(proxy
);
1271 virtio_bus_reset(bus
);
1272 msix_unuse_all_vectors(&proxy
->pci_dev
);
1273 proxy
->flags
&= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG
;
1276 static void virtio_pci_class_init(ObjectClass
*klass
, void *data
)
1278 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1279 PCIDeviceClass
*k
= PCI_DEVICE_CLASS(klass
);
1281 k
->init
= virtio_pci_init
;
1282 k
->exit
= virtio_pci_exit
;
1283 k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1284 k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1285 k
->class_id
= PCI_CLASS_OTHERS
;
1286 dc
->reset
= virtio_pci_rst
;
1289 static const TypeInfo virtio_pci_info
= {
1290 .name
= TYPE_VIRTIO_PCI
,
1291 .parent
= TYPE_PCI_DEVICE
,
1292 .instance_size
= sizeof(VirtIOPCIProxy
),
1293 .class_init
= virtio_pci_class_init
,
1294 .class_size
= sizeof(VirtioPCIClass
),
1298 /* virtio-blk-pci */
1300 static Property virtio_blk_pci_properties
[] = {
1301 DEFINE_PROP_HEX32("class", VirtIOPCIProxy
, class_code
, 0),
1302 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
,
1303 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, true),
1304 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
, 2),
1305 #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
1306 DEFINE_PROP_BIT("x-data-plane", VirtIOBlkPCI
, blk
.data_plane
, 0, false),
1308 DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy
, host_features
),
1309 DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkPCI
, blk
),
1310 DEFINE_PROP_END_OF_LIST(),
1313 static int virtio_blk_pci_init(VirtIOPCIProxy
*vpci_dev
)
1315 VirtIOBlkPCI
*dev
= VIRTIO_BLK_PCI(vpci_dev
);
1316 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
1317 virtio_blk_set_conf(vdev
, &(dev
->blk
));
1318 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
1319 if (qdev_init(vdev
) < 0) {
1325 static void virtio_blk_pci_class_init(ObjectClass
*klass
, void *data
)
1327 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1328 VirtioPCIClass
*k
= VIRTIO_PCI_CLASS(klass
);
1329 PCIDeviceClass
*pcidev_k
= PCI_DEVICE_CLASS(klass
);
1331 dc
->props
= virtio_blk_pci_properties
;
1332 k
->init
= virtio_blk_pci_init
;
1333 pcidev_k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1334 pcidev_k
->device_id
= PCI_DEVICE_ID_VIRTIO_BLOCK
;
1335 pcidev_k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1336 pcidev_k
->class_id
= PCI_CLASS_STORAGE_SCSI
;
1339 static void virtio_blk_pci_instance_init(Object
*obj
)
1341 VirtIOBlkPCI
*dev
= VIRTIO_BLK_PCI(obj
);
1342 object_initialize(OBJECT(&dev
->vdev
), TYPE_VIRTIO_BLK
);
1343 object_property_add_child(obj
, "virtio-backend", OBJECT(&dev
->vdev
), NULL
);
1346 static const TypeInfo virtio_blk_pci_info
= {
1347 .name
= TYPE_VIRTIO_BLK_PCI
,
1348 .parent
= TYPE_VIRTIO_PCI
,
1349 .instance_size
= sizeof(VirtIOBlkPCI
),
1350 .instance_init
= virtio_blk_pci_instance_init
,
1351 .class_init
= virtio_blk_pci_class_init
,
1354 /* virtio-scsi-pci */
1356 static Property virtio_scsi_pci_properties
[] = {
1357 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
,
1358 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, true),
1359 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
,
1360 DEV_NVECTORS_UNSPECIFIED
),
1361 DEFINE_VIRTIO_SCSI_FEATURES(VirtIOPCIProxy
, host_features
),
1362 DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSIPCI
, vdev
.conf
),
1363 DEFINE_PROP_END_OF_LIST(),
1366 static int virtio_scsi_pci_init_pci(VirtIOPCIProxy
*vpci_dev
)
1368 VirtIOSCSIPCI
*dev
= VIRTIO_SCSI_PCI(vpci_dev
);
1369 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
1371 if (vpci_dev
->nvectors
== DEV_NVECTORS_UNSPECIFIED
) {
1372 vpci_dev
->nvectors
= dev
->vdev
.conf
.num_queues
+ 3;
1375 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
1376 if (qdev_init(vdev
) < 0) {
1382 static void virtio_scsi_pci_class_init(ObjectClass
*klass
, void *data
)
1384 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1385 VirtioPCIClass
*k
= VIRTIO_PCI_CLASS(klass
);
1386 PCIDeviceClass
*pcidev_k
= PCI_DEVICE_CLASS(klass
);
1387 k
->init
= virtio_scsi_pci_init_pci
;
1388 dc
->props
= virtio_scsi_pci_properties
;
1389 pcidev_k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1390 pcidev_k
->device_id
= PCI_DEVICE_ID_VIRTIO_SCSI
;
1391 pcidev_k
->revision
= 0x00;
1392 pcidev_k
->class_id
= PCI_CLASS_STORAGE_SCSI
;
1395 static void virtio_scsi_pci_instance_init(Object
*obj
)
1397 VirtIOSCSIPCI
*dev
= VIRTIO_SCSI_PCI(obj
);
1398 object_initialize(OBJECT(&dev
->vdev
), TYPE_VIRTIO_SCSI
);
1399 object_property_add_child(obj
, "virtio-backend", OBJECT(&dev
->vdev
), NULL
);
1402 static const TypeInfo virtio_scsi_pci_info
= {
1403 .name
= TYPE_VIRTIO_SCSI_PCI
,
1404 .parent
= TYPE_VIRTIO_PCI
,
1405 .instance_size
= sizeof(VirtIOSCSIPCI
),
1406 .instance_init
= virtio_scsi_pci_instance_init
,
1407 .class_init
= virtio_scsi_pci_class_init
,
1410 /* virtio-balloon-pci */
1412 static Property virtio_balloon_pci_properties
[] = {
1413 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy
, host_features
),
1414 DEFINE_PROP_HEX32("class", VirtIOPCIProxy
, class_code
, 0),
1415 DEFINE_PROP_END_OF_LIST(),
1418 static int virtio_balloon_pci_init(VirtIOPCIProxy
*vpci_dev
)
1420 VirtIOBalloonPCI
*dev
= VIRTIO_BALLOON_PCI(vpci_dev
);
1421 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
1423 if (vpci_dev
->class_code
!= PCI_CLASS_OTHERS
&&
1424 vpci_dev
->class_code
!= PCI_CLASS_MEMORY_RAM
) { /* qemu < 1.1 */
1425 vpci_dev
->class_code
= PCI_CLASS_OTHERS
;
1428 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
1429 if (qdev_init(vdev
) < 0) {
1435 static void virtio_balloon_pci_class_init(ObjectClass
*klass
, void *data
)
1437 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1438 VirtioPCIClass
*k
= VIRTIO_PCI_CLASS(klass
);
1439 PCIDeviceClass
*pcidev_k
= PCI_DEVICE_CLASS(klass
);
1440 k
->init
= virtio_balloon_pci_init
;
1441 dc
->props
= virtio_balloon_pci_properties
;
1442 pcidev_k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1443 pcidev_k
->device_id
= PCI_DEVICE_ID_VIRTIO_BALLOON
;
1444 pcidev_k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1445 pcidev_k
->class_id
= PCI_CLASS_OTHERS
;
1448 static void virtio_balloon_pci_instance_init(Object
*obj
)
1450 VirtIOBalloonPCI
*dev
= VIRTIO_BALLOON_PCI(obj
);
1451 object_initialize(OBJECT(&dev
->vdev
), TYPE_VIRTIO_BALLOON
);
1452 object_property_add_child(obj
, "virtio-backend", OBJECT(&dev
->vdev
), NULL
);
1455 static const TypeInfo virtio_balloon_pci_info
= {
1456 .name
= TYPE_VIRTIO_BALLOON_PCI
,
1457 .parent
= TYPE_VIRTIO_PCI
,
1458 .instance_size
= sizeof(VirtIOBalloonPCI
),
1459 .instance_init
= virtio_balloon_pci_instance_init
,
1460 .class_init
= virtio_balloon_pci_class_init
,
1463 /* virtio-pci-bus */
1465 void virtio_pci_bus_new(VirtioBusState
*bus
, VirtIOPCIProxy
*dev
)
1467 DeviceState
*qdev
= DEVICE(dev
);
1469 qbus_create_inplace((BusState
*)bus
, TYPE_VIRTIO_PCI_BUS
, qdev
, NULL
);
1471 qbus
->allow_hotplug
= 1;
1474 static void virtio_pci_bus_class_init(ObjectClass
*klass
, void *data
)
1476 BusClass
*bus_class
= BUS_CLASS(klass
);
1477 VirtioBusClass
*k
= VIRTIO_BUS_CLASS(klass
);
1478 bus_class
->max_dev
= 1;
1479 k
->notify
= virtio_pci_notify
;
1480 k
->save_config
= virtio_pci_save_config
;
1481 k
->load_config
= virtio_pci_load_config
;
1482 k
->save_queue
= virtio_pci_save_queue
;
1483 k
->load_queue
= virtio_pci_load_queue
;
1484 k
->get_features
= virtio_pci_get_features
;
1485 k
->query_guest_notifiers
= virtio_pci_query_guest_notifiers
;
1486 k
->set_host_notifier
= virtio_pci_set_host_notifier
;
1487 k
->set_guest_notifiers
= virtio_pci_set_guest_notifiers
;
1488 k
->vmstate_change
= virtio_pci_vmstate_change
;
1489 k
->device_plugged
= virtio_pci_device_plugged
;
1492 static const TypeInfo virtio_pci_bus_info
= {
1493 .name
= TYPE_VIRTIO_PCI_BUS
,
1494 .parent
= TYPE_VIRTIO_BUS
,
1495 .instance_size
= sizeof(VirtioPCIBusState
),
1496 .class_init
= virtio_pci_bus_class_init
,
1499 static void virtio_pci_register_types(void)
1501 type_register_static(&virtio_net_info
);
1502 type_register_static(&virtio_serial_info
);
1503 type_register_static(&virtio_rng_info
);
1504 type_register_static(&virtio_pci_bus_info
);
1505 type_register_static(&virtio_pci_info
);
1506 #ifdef CONFIG_VIRTFS
1507 type_register_static(&virtio_9p_info
);
1509 type_register_static(&virtio_blk_pci_info
);
1510 type_register_static(&virtio_scsi_pci_info
);
1511 type_register_static(&virtio_balloon_pci_info
);
1514 type_init(virtio_pci_register_types
)