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.
18 #include "qemu/osdep.h"
20 #include "standard-headers/linux/virtio_pci.h"
21 #include "hw/virtio/virtio.h"
22 #include "hw/virtio/virtio-blk.h"
23 #include "hw/virtio/virtio-net.h"
24 #include "hw/virtio/virtio-serial.h"
25 #include "hw/virtio/virtio-scsi.h"
26 #include "hw/pci/pci.h"
27 #include "qapi/error.h"
28 #include "qemu/error-report.h"
29 #include "hw/pci/msi.h"
30 #include "hw/pci/msix.h"
31 #include "hw/loader.h"
32 #include "sysemu/kvm.h"
33 #include "virtio-pci.h"
34 #include "qemu/range.h"
35 #include "hw/virtio/virtio-bus.h"
36 #include "qapi/visitor.h"
38 #define VIRTIO_PCI_REGION_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_present(dev))
40 #undef VIRTIO_PCI_CONFIG
42 /* The remaining space is defined by each driver as the per-driver
43 * configuration space */
44 #define VIRTIO_PCI_CONFIG_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_enabled(dev))
46 static void virtio_pci_bus_new(VirtioBusState
*bus
, size_t bus_size
,
48 static void virtio_pci_reset(DeviceState
*qdev
);
51 /* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */
52 static inline VirtIOPCIProxy
*to_virtio_pci_proxy(DeviceState
*d
)
54 return container_of(d
, VirtIOPCIProxy
, pci_dev
.qdev
);
57 /* DeviceState to VirtIOPCIProxy. Note: used on datapath,
58 * be careful and test performance if you change this.
60 static inline VirtIOPCIProxy
*to_virtio_pci_proxy_fast(DeviceState
*d
)
62 return container_of(d
, VirtIOPCIProxy
, pci_dev
.qdev
);
65 static void virtio_pci_notify(DeviceState
*d
, uint16_t vector
)
67 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy_fast(d
);
69 if (msix_enabled(&proxy
->pci_dev
))
70 msix_notify(&proxy
->pci_dev
, vector
);
72 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
73 pci_set_irq(&proxy
->pci_dev
, atomic_read(&vdev
->isr
) & 1);
77 static void virtio_pci_save_config(DeviceState
*d
, QEMUFile
*f
)
79 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
80 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
82 pci_device_save(&proxy
->pci_dev
, f
);
83 msix_save(&proxy
->pci_dev
, f
);
84 if (msix_present(&proxy
->pci_dev
))
85 qemu_put_be16(f
, vdev
->config_vector
);
88 static const VMStateDescription vmstate_virtio_pci_modern_queue_state
= {
89 .name
= "virtio_pci/modern_queue_state",
91 .minimum_version_id
= 1,
92 .fields
= (VMStateField
[]) {
93 VMSTATE_UINT16(num
, VirtIOPCIQueue
),
94 VMSTATE_UNUSED(1), /* enabled was stored as be16 */
95 VMSTATE_BOOL(enabled
, VirtIOPCIQueue
),
96 VMSTATE_UINT32_ARRAY(desc
, VirtIOPCIQueue
, 2),
97 VMSTATE_UINT32_ARRAY(avail
, VirtIOPCIQueue
, 2),
98 VMSTATE_UINT32_ARRAY(used
, VirtIOPCIQueue
, 2),
103 static bool virtio_pci_modern_state_needed(void *opaque
)
105 VirtIOPCIProxy
*proxy
= opaque
;
107 return virtio_pci_modern(proxy
);
110 static const VMStateDescription vmstate_virtio_pci_modern_state_sub
= {
111 .name
= "virtio_pci/modern_state",
113 .minimum_version_id
= 1,
114 .needed
= &virtio_pci_modern_state_needed
,
115 .fields
= (VMStateField
[]) {
116 VMSTATE_UINT32(dfselect
, VirtIOPCIProxy
),
117 VMSTATE_UINT32(gfselect
, VirtIOPCIProxy
),
118 VMSTATE_UINT32_ARRAY(guest_features
, VirtIOPCIProxy
, 2),
119 VMSTATE_STRUCT_ARRAY(vqs
, VirtIOPCIProxy
, VIRTIO_QUEUE_MAX
, 0,
120 vmstate_virtio_pci_modern_queue_state
,
122 VMSTATE_END_OF_LIST()
126 static const VMStateDescription vmstate_virtio_pci
= {
127 .name
= "virtio_pci",
129 .minimum_version_id
= 1,
130 .minimum_version_id_old
= 1,
131 .fields
= (VMStateField
[]) {
132 VMSTATE_END_OF_LIST()
134 .subsections
= (const VMStateDescription
*[]) {
135 &vmstate_virtio_pci_modern_state_sub
,
140 static bool virtio_pci_has_extra_state(DeviceState
*d
)
142 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
144 return proxy
->flags
& VIRTIO_PCI_FLAG_MIGRATE_EXTRA
;
147 static void virtio_pci_save_extra_state(DeviceState
*d
, QEMUFile
*f
)
149 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
151 vmstate_save_state(f
, &vmstate_virtio_pci
, proxy
, NULL
);
154 static int virtio_pci_load_extra_state(DeviceState
*d
, QEMUFile
*f
)
156 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
158 return vmstate_load_state(f
, &vmstate_virtio_pci
, proxy
, 1);
161 static void virtio_pci_save_queue(DeviceState
*d
, int n
, QEMUFile
*f
)
163 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
164 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
166 if (msix_present(&proxy
->pci_dev
))
167 qemu_put_be16(f
, virtio_queue_vector(vdev
, n
));
170 static int virtio_pci_load_config(DeviceState
*d
, QEMUFile
*f
)
172 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
173 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
176 ret
= pci_device_load(&proxy
->pci_dev
, f
);
180 msix_unuse_all_vectors(&proxy
->pci_dev
);
181 msix_load(&proxy
->pci_dev
, f
);
182 if (msix_present(&proxy
->pci_dev
)) {
183 qemu_get_be16s(f
, &vdev
->config_vector
);
185 vdev
->config_vector
= VIRTIO_NO_VECTOR
;
187 if (vdev
->config_vector
!= VIRTIO_NO_VECTOR
) {
188 return msix_vector_use(&proxy
->pci_dev
, vdev
->config_vector
);
193 static int virtio_pci_load_queue(DeviceState
*d
, int n
, QEMUFile
*f
)
195 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
196 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
199 if (msix_present(&proxy
->pci_dev
)) {
200 qemu_get_be16s(f
, &vector
);
202 vector
= VIRTIO_NO_VECTOR
;
204 virtio_queue_set_vector(vdev
, n
, vector
);
205 if (vector
!= VIRTIO_NO_VECTOR
) {
206 return msix_vector_use(&proxy
->pci_dev
, vector
);
212 static bool virtio_pci_ioeventfd_enabled(DeviceState
*d
)
214 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
216 return (proxy
->flags
& VIRTIO_PCI_FLAG_USE_IOEVENTFD
) != 0;
219 #define QEMU_VIRTIO_PCI_QUEUE_MEM_MULT 0x1000
221 static inline int virtio_pci_queue_mem_mult(struct VirtIOPCIProxy
*proxy
)
223 return (proxy
->flags
& VIRTIO_PCI_FLAG_PAGE_PER_VQ
) ?
224 QEMU_VIRTIO_PCI_QUEUE_MEM_MULT
: 4;
227 static int virtio_pci_ioeventfd_assign(DeviceState
*d
, EventNotifier
*notifier
,
230 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
231 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
232 VirtQueue
*vq
= virtio_get_queue(vdev
, n
);
233 bool legacy
= virtio_pci_legacy(proxy
);
234 bool modern
= virtio_pci_modern(proxy
);
235 bool fast_mmio
= kvm_ioeventfd_any_length_enabled();
236 bool modern_pio
= proxy
->flags
& VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY
;
237 MemoryRegion
*modern_mr
= &proxy
->notify
.mr
;
238 MemoryRegion
*modern_notify_mr
= &proxy
->notify_pio
.mr
;
239 MemoryRegion
*legacy_mr
= &proxy
->bar
;
240 hwaddr modern_addr
= virtio_pci_queue_mem_mult(proxy
) *
241 virtio_get_queue_index(vq
);
242 hwaddr legacy_addr
= VIRTIO_PCI_QUEUE_NOTIFY
;
247 memory_region_add_eventfd(modern_mr
, modern_addr
, 0,
250 memory_region_add_eventfd(modern_mr
, modern_addr
, 2,
254 memory_region_add_eventfd(modern_notify_mr
, 0, 2,
259 memory_region_add_eventfd(legacy_mr
, legacy_addr
, 2,
265 memory_region_del_eventfd(modern_mr
, modern_addr
, 0,
268 memory_region_del_eventfd(modern_mr
, modern_addr
, 2,
272 memory_region_del_eventfd(modern_notify_mr
, 0, 2,
277 memory_region_del_eventfd(legacy_mr
, legacy_addr
, 2,
284 static void virtio_pci_start_ioeventfd(VirtIOPCIProxy
*proxy
)
286 virtio_bus_start_ioeventfd(&proxy
->bus
);
289 static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy
*proxy
)
291 virtio_bus_stop_ioeventfd(&proxy
->bus
);
294 static void virtio_ioport_write(void *opaque
, uint32_t addr
, uint32_t val
)
296 VirtIOPCIProxy
*proxy
= opaque
;
297 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
301 case VIRTIO_PCI_GUEST_FEATURES
:
302 /* Guest does not negotiate properly? We have to assume nothing. */
303 if (val
& (1 << VIRTIO_F_BAD_FEATURE
)) {
304 val
= virtio_bus_get_vdev_bad_features(&proxy
->bus
);
306 virtio_set_features(vdev
, val
);
308 case VIRTIO_PCI_QUEUE_PFN
:
309 pa
= (hwaddr
)val
<< VIRTIO_PCI_QUEUE_ADDR_SHIFT
;
311 virtio_pci_reset(DEVICE(proxy
));
314 virtio_queue_set_addr(vdev
, vdev
->queue_sel
, pa
);
316 case VIRTIO_PCI_QUEUE_SEL
:
317 if (val
< VIRTIO_QUEUE_MAX
)
318 vdev
->queue_sel
= val
;
320 case VIRTIO_PCI_QUEUE_NOTIFY
:
321 if (val
< VIRTIO_QUEUE_MAX
) {
322 virtio_queue_notify(vdev
, val
);
325 case VIRTIO_PCI_STATUS
:
326 if (!(val
& VIRTIO_CONFIG_S_DRIVER_OK
)) {
327 virtio_pci_stop_ioeventfd(proxy
);
330 virtio_set_status(vdev
, val
& 0xFF);
332 if (val
& VIRTIO_CONFIG_S_DRIVER_OK
) {
333 virtio_pci_start_ioeventfd(proxy
);
336 if (vdev
->status
== 0) {
337 virtio_pci_reset(DEVICE(proxy
));
340 /* Linux before 2.6.34 drives the device without enabling
341 the PCI device bus master bit. Enable it automatically
342 for the guest. This is a PCI spec violation but so is
343 initiating DMA with bus master bit clear. */
344 if (val
== (VIRTIO_CONFIG_S_ACKNOWLEDGE
| VIRTIO_CONFIG_S_DRIVER
)) {
345 pci_default_write_config(&proxy
->pci_dev
, PCI_COMMAND
,
346 proxy
->pci_dev
.config
[PCI_COMMAND
] |
347 PCI_COMMAND_MASTER
, 1);
350 case VIRTIO_MSI_CONFIG_VECTOR
:
351 msix_vector_unuse(&proxy
->pci_dev
, vdev
->config_vector
);
352 /* Make it possible for guest to discover an error took place. */
353 if (msix_vector_use(&proxy
->pci_dev
, val
) < 0)
354 val
= VIRTIO_NO_VECTOR
;
355 vdev
->config_vector
= val
;
357 case VIRTIO_MSI_QUEUE_VECTOR
:
358 msix_vector_unuse(&proxy
->pci_dev
,
359 virtio_queue_vector(vdev
, vdev
->queue_sel
));
360 /* Make it possible for guest to discover an error took place. */
361 if (msix_vector_use(&proxy
->pci_dev
, val
) < 0)
362 val
= VIRTIO_NO_VECTOR
;
363 virtio_queue_set_vector(vdev
, vdev
->queue_sel
, val
);
366 error_report("%s: unexpected address 0x%x value 0x%x",
367 __func__
, addr
, val
);
372 static uint32_t virtio_ioport_read(VirtIOPCIProxy
*proxy
, uint32_t addr
)
374 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
375 uint32_t ret
= 0xFFFFFFFF;
378 case VIRTIO_PCI_HOST_FEATURES
:
379 ret
= vdev
->host_features
;
381 case VIRTIO_PCI_GUEST_FEATURES
:
382 ret
= vdev
->guest_features
;
384 case VIRTIO_PCI_QUEUE_PFN
:
385 ret
= virtio_queue_get_addr(vdev
, vdev
->queue_sel
)
386 >> VIRTIO_PCI_QUEUE_ADDR_SHIFT
;
388 case VIRTIO_PCI_QUEUE_NUM
:
389 ret
= virtio_queue_get_num(vdev
, vdev
->queue_sel
);
391 case VIRTIO_PCI_QUEUE_SEL
:
392 ret
= vdev
->queue_sel
;
394 case VIRTIO_PCI_STATUS
:
398 /* reading from the ISR also clears it. */
399 ret
= atomic_xchg(&vdev
->isr
, 0);
400 pci_irq_deassert(&proxy
->pci_dev
);
402 case VIRTIO_MSI_CONFIG_VECTOR
:
403 ret
= vdev
->config_vector
;
405 case VIRTIO_MSI_QUEUE_VECTOR
:
406 ret
= virtio_queue_vector(vdev
, vdev
->queue_sel
);
415 static uint64_t virtio_pci_config_read(void *opaque
, hwaddr addr
,
418 VirtIOPCIProxy
*proxy
= opaque
;
419 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
420 uint32_t config
= VIRTIO_PCI_CONFIG_SIZE(&proxy
->pci_dev
);
423 return virtio_ioport_read(proxy
, addr
);
429 val
= virtio_config_readb(vdev
, addr
);
432 val
= virtio_config_readw(vdev
, addr
);
433 if (virtio_is_big_endian(vdev
)) {
438 val
= virtio_config_readl(vdev
, addr
);
439 if (virtio_is_big_endian(vdev
)) {
447 static void virtio_pci_config_write(void *opaque
, hwaddr addr
,
448 uint64_t val
, unsigned size
)
450 VirtIOPCIProxy
*proxy
= opaque
;
451 uint32_t config
= VIRTIO_PCI_CONFIG_SIZE(&proxy
->pci_dev
);
452 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
454 virtio_ioport_write(proxy
, addr
, val
);
459 * Virtio-PCI is odd. Ioports are LE but config space is target native
464 virtio_config_writeb(vdev
, addr
, val
);
467 if (virtio_is_big_endian(vdev
)) {
470 virtio_config_writew(vdev
, addr
, val
);
473 if (virtio_is_big_endian(vdev
)) {
476 virtio_config_writel(vdev
, addr
, val
);
481 static const MemoryRegionOps virtio_pci_config_ops
= {
482 .read
= virtio_pci_config_read
,
483 .write
= virtio_pci_config_write
,
485 .min_access_size
= 1,
486 .max_access_size
= 4,
488 .endianness
= DEVICE_LITTLE_ENDIAN
,
491 static MemoryRegion
*virtio_address_space_lookup(VirtIOPCIProxy
*proxy
,
492 hwaddr
*off
, int len
)
495 VirtIOPCIRegion
*reg
;
497 for (i
= 0; i
< ARRAY_SIZE(proxy
->regs
); ++i
) {
498 reg
= &proxy
->regs
[i
];
499 if (*off
>= reg
->offset
&&
500 *off
+ len
<= reg
->offset
+ reg
->size
) {
509 /* Below are generic functions to do memcpy from/to an address space,
510 * without byteswaps, with input validation.
512 * As regular address_space_* APIs all do some kind of byteswap at least for
513 * some host/target combinations, we are forced to explicitly convert to a
514 * known-endianness integer value.
515 * It doesn't really matter which endian format to go through, so the code
516 * below selects the endian that causes the least amount of work on the given
519 * Note: host pointer must be aligned.
522 void virtio_address_space_write(VirtIOPCIProxy
*proxy
, hwaddr addr
,
523 const uint8_t *buf
, int len
)
528 /* address_space_* APIs assume an aligned address.
529 * As address is under guest control, handle illegal values.
533 mr
= virtio_address_space_lookup(proxy
, &addr
, len
);
538 /* Make sure caller aligned buf properly */
539 assert(!(((uintptr_t)buf
) & (len
- 1)));
543 val
= pci_get_byte(buf
);
546 val
= cpu_to_le16(pci_get_word(buf
));
549 val
= cpu_to_le32(pci_get_long(buf
));
552 /* As length is under guest control, handle illegal values. */
555 memory_region_dispatch_write(mr
, addr
, val
, len
, MEMTXATTRS_UNSPECIFIED
);
559 virtio_address_space_read(VirtIOPCIProxy
*proxy
, hwaddr addr
,
560 uint8_t *buf
, int len
)
565 /* address_space_* APIs assume an aligned address.
566 * As address is under guest control, handle illegal values.
570 mr
= virtio_address_space_lookup(proxy
, &addr
, len
);
575 /* Make sure caller aligned buf properly */
576 assert(!(((uintptr_t)buf
) & (len
- 1)));
578 memory_region_dispatch_read(mr
, addr
, &val
, len
, MEMTXATTRS_UNSPECIFIED
);
581 pci_set_byte(buf
, val
);
584 pci_set_word(buf
, le16_to_cpu(val
));
587 pci_set_long(buf
, le32_to_cpu(val
));
590 /* As length is under guest control, handle illegal values. */
595 static void virtio_write_config(PCIDevice
*pci_dev
, uint32_t address
,
596 uint32_t val
, int len
)
598 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
599 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
600 struct virtio_pci_cfg_cap
*cfg
;
602 pci_default_write_config(pci_dev
, address
, val
, len
);
604 if (range_covers_byte(address
, len
, PCI_COMMAND
) &&
605 !(pci_dev
->config
[PCI_COMMAND
] & PCI_COMMAND_MASTER
)) {
606 virtio_pci_stop_ioeventfd(proxy
);
607 virtio_set_status(vdev
, vdev
->status
& ~VIRTIO_CONFIG_S_DRIVER_OK
);
610 if (proxy
->config_cap
&&
611 ranges_overlap(address
, len
, proxy
->config_cap
+ offsetof(struct virtio_pci_cfg_cap
,
613 sizeof cfg
->pci_cfg_data
)) {
617 cfg
= (void *)(proxy
->pci_dev
.config
+ proxy
->config_cap
);
618 off
= le32_to_cpu(cfg
->cap
.offset
);
619 len
= le32_to_cpu(cfg
->cap
.length
);
621 if (len
== 1 || len
== 2 || len
== 4) {
622 assert(len
<= sizeof cfg
->pci_cfg_data
);
623 virtio_address_space_write(proxy
, off
, cfg
->pci_cfg_data
, len
);
628 static uint32_t virtio_read_config(PCIDevice
*pci_dev
,
629 uint32_t address
, int len
)
631 VirtIOPCIProxy
*proxy
= DO_UPCAST(VirtIOPCIProxy
, pci_dev
, pci_dev
);
632 struct virtio_pci_cfg_cap
*cfg
;
634 if (proxy
->config_cap
&&
635 ranges_overlap(address
, len
, proxy
->config_cap
+ offsetof(struct virtio_pci_cfg_cap
,
637 sizeof cfg
->pci_cfg_data
)) {
641 cfg
= (void *)(proxy
->pci_dev
.config
+ proxy
->config_cap
);
642 off
= le32_to_cpu(cfg
->cap
.offset
);
643 len
= le32_to_cpu(cfg
->cap
.length
);
645 if (len
== 1 || len
== 2 || len
== 4) {
646 assert(len
<= sizeof cfg
->pci_cfg_data
);
647 virtio_address_space_read(proxy
, off
, cfg
->pci_cfg_data
, len
);
651 return pci_default_read_config(pci_dev
, address
, len
);
654 static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy
*proxy
,
655 unsigned int queue_no
,
658 VirtIOIRQFD
*irqfd
= &proxy
->vector_irqfd
[vector
];
661 if (irqfd
->users
== 0) {
662 ret
= kvm_irqchip_add_msi_route(kvm_state
, vector
, &proxy
->pci_dev
);
672 static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy
*proxy
,
675 VirtIOIRQFD
*irqfd
= &proxy
->vector_irqfd
[vector
];
676 if (--irqfd
->users
== 0) {
677 kvm_irqchip_release_virq(kvm_state
, irqfd
->virq
);
681 static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy
*proxy
,
682 unsigned int queue_no
,
685 VirtIOIRQFD
*irqfd
= &proxy
->vector_irqfd
[vector
];
686 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
687 VirtQueue
*vq
= virtio_get_queue(vdev
, queue_no
);
688 EventNotifier
*n
= virtio_queue_get_guest_notifier(vq
);
689 return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state
, n
, NULL
, irqfd
->virq
);
692 static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy
*proxy
,
693 unsigned int queue_no
,
696 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
697 VirtQueue
*vq
= virtio_get_queue(vdev
, queue_no
);
698 EventNotifier
*n
= virtio_queue_get_guest_notifier(vq
);
699 VirtIOIRQFD
*irqfd
= &proxy
->vector_irqfd
[vector
];
702 ret
= kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state
, n
, irqfd
->virq
);
706 static int kvm_virtio_pci_vector_use(VirtIOPCIProxy
*proxy
, int nvqs
)
708 PCIDevice
*dev
= &proxy
->pci_dev
;
709 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
710 VirtioDeviceClass
*k
= VIRTIO_DEVICE_GET_CLASS(vdev
);
714 for (queue_no
= 0; queue_no
< nvqs
; queue_no
++) {
715 if (!virtio_queue_get_num(vdev
, queue_no
)) {
718 vector
= virtio_queue_vector(vdev
, queue_no
);
719 if (vector
>= msix_nr_vectors_allocated(dev
)) {
722 ret
= kvm_virtio_pci_vq_vector_use(proxy
, queue_no
, vector
);
726 /* If guest supports masking, set up irqfd now.
727 * Otherwise, delay until unmasked in the frontend.
729 if (vdev
->use_guest_notifier_mask
&& k
->guest_notifier_mask
) {
730 ret
= kvm_virtio_pci_irqfd_use(proxy
, queue_no
, vector
);
732 kvm_virtio_pci_vq_vector_release(proxy
, vector
);
740 while (--queue_no
>= 0) {
741 vector
= virtio_queue_vector(vdev
, queue_no
);
742 if (vector
>= msix_nr_vectors_allocated(dev
)) {
745 if (vdev
->use_guest_notifier_mask
&& k
->guest_notifier_mask
) {
746 kvm_virtio_pci_irqfd_release(proxy
, queue_no
, vector
);
748 kvm_virtio_pci_vq_vector_release(proxy
, vector
);
753 static void kvm_virtio_pci_vector_release(VirtIOPCIProxy
*proxy
, int nvqs
)
755 PCIDevice
*dev
= &proxy
->pci_dev
;
756 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
759 VirtioDeviceClass
*k
= VIRTIO_DEVICE_GET_CLASS(vdev
);
761 for (queue_no
= 0; queue_no
< nvqs
; queue_no
++) {
762 if (!virtio_queue_get_num(vdev
, queue_no
)) {
765 vector
= virtio_queue_vector(vdev
, queue_no
);
766 if (vector
>= msix_nr_vectors_allocated(dev
)) {
769 /* If guest supports masking, clean up irqfd now.
770 * Otherwise, it was cleaned when masked in the frontend.
772 if (vdev
->use_guest_notifier_mask
&& k
->guest_notifier_mask
) {
773 kvm_virtio_pci_irqfd_release(proxy
, queue_no
, vector
);
775 kvm_virtio_pci_vq_vector_release(proxy
, vector
);
779 static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy
*proxy
,
780 unsigned int queue_no
,
784 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
785 VirtioDeviceClass
*k
= VIRTIO_DEVICE_GET_CLASS(vdev
);
786 VirtQueue
*vq
= virtio_get_queue(vdev
, queue_no
);
787 EventNotifier
*n
= virtio_queue_get_guest_notifier(vq
);
791 if (proxy
->vector_irqfd
) {
792 irqfd
= &proxy
->vector_irqfd
[vector
];
793 if (irqfd
->msg
.data
!= msg
.data
|| irqfd
->msg
.address
!= msg
.address
) {
794 ret
= kvm_irqchip_update_msi_route(kvm_state
, irqfd
->virq
, msg
,
799 kvm_irqchip_commit_routes(kvm_state
);
803 /* If guest supports masking, irqfd is already setup, unmask it.
804 * Otherwise, set it up now.
806 if (vdev
->use_guest_notifier_mask
&& k
->guest_notifier_mask
) {
807 k
->guest_notifier_mask(vdev
, queue_no
, false);
808 /* Test after unmasking to avoid losing events. */
809 if (k
->guest_notifier_pending
&&
810 k
->guest_notifier_pending(vdev
, queue_no
)) {
811 event_notifier_set(n
);
814 ret
= kvm_virtio_pci_irqfd_use(proxy
, queue_no
, vector
);
819 static void virtio_pci_vq_vector_mask(VirtIOPCIProxy
*proxy
,
820 unsigned int queue_no
,
823 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
824 VirtioDeviceClass
*k
= VIRTIO_DEVICE_GET_CLASS(vdev
);
826 /* If guest supports masking, keep irqfd but mask it.
827 * Otherwise, clean it up now.
829 if (vdev
->use_guest_notifier_mask
&& k
->guest_notifier_mask
) {
830 k
->guest_notifier_mask(vdev
, queue_no
, true);
832 kvm_virtio_pci_irqfd_release(proxy
, queue_no
, vector
);
836 static int virtio_pci_vector_unmask(PCIDevice
*dev
, unsigned vector
,
839 VirtIOPCIProxy
*proxy
= container_of(dev
, VirtIOPCIProxy
, pci_dev
);
840 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
841 VirtQueue
*vq
= virtio_vector_first_queue(vdev
, vector
);
842 int ret
, index
, unmasked
= 0;
845 index
= virtio_get_queue_index(vq
);
846 if (!virtio_queue_get_num(vdev
, index
)) {
849 if (index
< proxy
->nvqs_with_notifiers
) {
850 ret
= virtio_pci_vq_vector_unmask(proxy
, index
, vector
, msg
);
856 vq
= virtio_vector_next_queue(vq
);
862 vq
= virtio_vector_first_queue(vdev
, vector
);
863 while (vq
&& unmasked
>= 0) {
864 index
= virtio_get_queue_index(vq
);
865 if (index
< proxy
->nvqs_with_notifiers
) {
866 virtio_pci_vq_vector_mask(proxy
, index
, vector
);
869 vq
= virtio_vector_next_queue(vq
);
874 static void virtio_pci_vector_mask(PCIDevice
*dev
, unsigned vector
)
876 VirtIOPCIProxy
*proxy
= container_of(dev
, VirtIOPCIProxy
, pci_dev
);
877 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
878 VirtQueue
*vq
= virtio_vector_first_queue(vdev
, vector
);
882 index
= virtio_get_queue_index(vq
);
883 if (!virtio_queue_get_num(vdev
, index
)) {
886 if (index
< proxy
->nvqs_with_notifiers
) {
887 virtio_pci_vq_vector_mask(proxy
, index
, vector
);
889 vq
= virtio_vector_next_queue(vq
);
893 static void virtio_pci_vector_poll(PCIDevice
*dev
,
894 unsigned int vector_start
,
895 unsigned int vector_end
)
897 VirtIOPCIProxy
*proxy
= container_of(dev
, VirtIOPCIProxy
, pci_dev
);
898 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
899 VirtioDeviceClass
*k
= VIRTIO_DEVICE_GET_CLASS(vdev
);
902 EventNotifier
*notifier
;
905 for (queue_no
= 0; queue_no
< proxy
->nvqs_with_notifiers
; queue_no
++) {
906 if (!virtio_queue_get_num(vdev
, queue_no
)) {
909 vector
= virtio_queue_vector(vdev
, queue_no
);
910 if (vector
< vector_start
|| vector
>= vector_end
||
911 !msix_is_masked(dev
, vector
)) {
914 vq
= virtio_get_queue(vdev
, queue_no
);
915 notifier
= virtio_queue_get_guest_notifier(vq
);
916 if (k
->guest_notifier_pending
) {
917 if (k
->guest_notifier_pending(vdev
, queue_no
)) {
918 msix_set_pending(dev
, vector
);
920 } else if (event_notifier_test_and_clear(notifier
)) {
921 msix_set_pending(dev
, vector
);
926 static int virtio_pci_set_guest_notifier(DeviceState
*d
, int n
, bool assign
,
929 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
930 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
931 VirtioDeviceClass
*vdc
= VIRTIO_DEVICE_GET_CLASS(vdev
);
932 VirtQueue
*vq
= virtio_get_queue(vdev
, n
);
933 EventNotifier
*notifier
= virtio_queue_get_guest_notifier(vq
);
936 int r
= event_notifier_init(notifier
, 0);
940 virtio_queue_set_guest_notifier_fd_handler(vq
, true, with_irqfd
);
942 virtio_queue_set_guest_notifier_fd_handler(vq
, false, with_irqfd
);
943 event_notifier_cleanup(notifier
);
946 if (!msix_enabled(&proxy
->pci_dev
) &&
947 vdev
->use_guest_notifier_mask
&&
948 vdc
->guest_notifier_mask
) {
949 vdc
->guest_notifier_mask(vdev
, n
, !assign
);
955 static bool virtio_pci_query_guest_notifiers(DeviceState
*d
)
957 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
958 return msix_enabled(&proxy
->pci_dev
);
961 static int virtio_pci_set_guest_notifiers(DeviceState
*d
, int nvqs
, bool assign
)
963 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
964 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
965 VirtioDeviceClass
*k
= VIRTIO_DEVICE_GET_CLASS(vdev
);
967 bool with_irqfd
= msix_enabled(&proxy
->pci_dev
) &&
968 kvm_msi_via_irqfd_enabled();
970 nvqs
= MIN(nvqs
, VIRTIO_QUEUE_MAX
);
972 /* When deassigning, pass a consistent nvqs value
973 * to avoid leaking notifiers.
975 assert(assign
|| nvqs
== proxy
->nvqs_with_notifiers
);
977 proxy
->nvqs_with_notifiers
= nvqs
;
979 /* Must unset vector notifier while guest notifier is still assigned */
980 if ((proxy
->vector_irqfd
|| k
->guest_notifier_mask
) && !assign
) {
981 msix_unset_vector_notifiers(&proxy
->pci_dev
);
982 if (proxy
->vector_irqfd
) {
983 kvm_virtio_pci_vector_release(proxy
, nvqs
);
984 g_free(proxy
->vector_irqfd
);
985 proxy
->vector_irqfd
= NULL
;
989 for (n
= 0; n
< nvqs
; n
++) {
990 if (!virtio_queue_get_num(vdev
, n
)) {
994 r
= virtio_pci_set_guest_notifier(d
, n
, assign
, with_irqfd
);
1000 /* Must set vector notifier after guest notifier has been assigned */
1001 if ((with_irqfd
|| k
->guest_notifier_mask
) && assign
) {
1003 proxy
->vector_irqfd
=
1004 g_malloc0(sizeof(*proxy
->vector_irqfd
) *
1005 msix_nr_vectors_allocated(&proxy
->pci_dev
));
1006 r
= kvm_virtio_pci_vector_use(proxy
, nvqs
);
1011 r
= msix_set_vector_notifiers(&proxy
->pci_dev
,
1012 virtio_pci_vector_unmask
,
1013 virtio_pci_vector_mask
,
1014 virtio_pci_vector_poll
);
1016 goto notifiers_error
;
1025 kvm_virtio_pci_vector_release(proxy
, nvqs
);
1029 /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
1032 virtio_pci_set_guest_notifier(d
, n
, !assign
, with_irqfd
);
1037 static int virtio_pci_set_host_notifier_mr(DeviceState
*d
, int n
,
1038 MemoryRegion
*mr
, bool assign
)
1040 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
1043 if (n
>= VIRTIO_QUEUE_MAX
|| !virtio_pci_modern(proxy
) ||
1044 virtio_pci_queue_mem_mult(proxy
) != memory_region_size(mr
)) {
1049 offset
= virtio_pci_queue_mem_mult(proxy
) * n
;
1050 memory_region_add_subregion_overlap(&proxy
->notify
.mr
, offset
, mr
, 1);
1052 memory_region_del_subregion(&proxy
->notify
.mr
, mr
);
1058 static void virtio_pci_vmstate_change(DeviceState
*d
, bool running
)
1060 VirtIOPCIProxy
*proxy
= to_virtio_pci_proxy(d
);
1061 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
1064 /* Old QEMU versions did not set bus master enable on status write.
1065 * Detect DRIVER set and enable it.
1067 if ((proxy
->flags
& VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION
) &&
1068 (vdev
->status
& VIRTIO_CONFIG_S_DRIVER
) &&
1069 !(proxy
->pci_dev
.config
[PCI_COMMAND
] & PCI_COMMAND_MASTER
)) {
1070 pci_default_write_config(&proxy
->pci_dev
, PCI_COMMAND
,
1071 proxy
->pci_dev
.config
[PCI_COMMAND
] |
1072 PCI_COMMAND_MASTER
, 1);
1074 virtio_pci_start_ioeventfd(proxy
);
1076 virtio_pci_stop_ioeventfd(proxy
);
1081 * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
1084 static int virtio_pci_query_nvectors(DeviceState
*d
)
1086 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(d
);
1088 return proxy
->nvectors
;
1091 static AddressSpace
*virtio_pci_get_dma_as(DeviceState
*d
)
1093 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(d
);
1094 PCIDevice
*dev
= &proxy
->pci_dev
;
1096 return pci_get_address_space(dev
);
1099 static int virtio_pci_add_mem_cap(VirtIOPCIProxy
*proxy
,
1100 struct virtio_pci_cap
*cap
)
1102 PCIDevice
*dev
= &proxy
->pci_dev
;
1105 offset
= pci_add_capability(dev
, PCI_CAP_ID_VNDR
, 0,
1106 cap
->cap_len
, &error_abort
);
1108 assert(cap
->cap_len
>= sizeof *cap
);
1109 memcpy(dev
->config
+ offset
+ PCI_CAP_FLAGS
, &cap
->cap_len
,
1110 cap
->cap_len
- PCI_CAP_FLAGS
);
1115 static uint64_t virtio_pci_common_read(void *opaque
, hwaddr addr
,
1118 VirtIOPCIProxy
*proxy
= opaque
;
1119 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
1124 case VIRTIO_PCI_COMMON_DFSELECT
:
1125 val
= proxy
->dfselect
;
1127 case VIRTIO_PCI_COMMON_DF
:
1128 if (proxy
->dfselect
<= 1) {
1129 VirtioDeviceClass
*vdc
= VIRTIO_DEVICE_GET_CLASS(vdev
);
1131 val
= (vdev
->host_features
& ~vdc
->legacy_features
) >>
1132 (32 * proxy
->dfselect
);
1135 case VIRTIO_PCI_COMMON_GFSELECT
:
1136 val
= proxy
->gfselect
;
1138 case VIRTIO_PCI_COMMON_GF
:
1139 if (proxy
->gfselect
< ARRAY_SIZE(proxy
->guest_features
)) {
1140 val
= proxy
->guest_features
[proxy
->gfselect
];
1143 case VIRTIO_PCI_COMMON_MSIX
:
1144 val
= vdev
->config_vector
;
1146 case VIRTIO_PCI_COMMON_NUMQ
:
1147 for (i
= 0; i
< VIRTIO_QUEUE_MAX
; ++i
) {
1148 if (virtio_queue_get_num(vdev
, i
)) {
1153 case VIRTIO_PCI_COMMON_STATUS
:
1156 case VIRTIO_PCI_COMMON_CFGGENERATION
:
1157 val
= vdev
->generation
;
1159 case VIRTIO_PCI_COMMON_Q_SELECT
:
1160 val
= vdev
->queue_sel
;
1162 case VIRTIO_PCI_COMMON_Q_SIZE
:
1163 val
= virtio_queue_get_num(vdev
, vdev
->queue_sel
);
1165 case VIRTIO_PCI_COMMON_Q_MSIX
:
1166 val
= virtio_queue_vector(vdev
, vdev
->queue_sel
);
1168 case VIRTIO_PCI_COMMON_Q_ENABLE
:
1169 val
= proxy
->vqs
[vdev
->queue_sel
].enabled
;
1171 case VIRTIO_PCI_COMMON_Q_NOFF
:
1172 /* Simply map queues in order */
1173 val
= vdev
->queue_sel
;
1175 case VIRTIO_PCI_COMMON_Q_DESCLO
:
1176 val
= proxy
->vqs
[vdev
->queue_sel
].desc
[0];
1178 case VIRTIO_PCI_COMMON_Q_DESCHI
:
1179 val
= proxy
->vqs
[vdev
->queue_sel
].desc
[1];
1181 case VIRTIO_PCI_COMMON_Q_AVAILLO
:
1182 val
= proxy
->vqs
[vdev
->queue_sel
].avail
[0];
1184 case VIRTIO_PCI_COMMON_Q_AVAILHI
:
1185 val
= proxy
->vqs
[vdev
->queue_sel
].avail
[1];
1187 case VIRTIO_PCI_COMMON_Q_USEDLO
:
1188 val
= proxy
->vqs
[vdev
->queue_sel
].used
[0];
1190 case VIRTIO_PCI_COMMON_Q_USEDHI
:
1191 val
= proxy
->vqs
[vdev
->queue_sel
].used
[1];
1200 static void virtio_pci_common_write(void *opaque
, hwaddr addr
,
1201 uint64_t val
, unsigned size
)
1203 VirtIOPCIProxy
*proxy
= opaque
;
1204 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
1207 case VIRTIO_PCI_COMMON_DFSELECT
:
1208 proxy
->dfselect
= val
;
1210 case VIRTIO_PCI_COMMON_GFSELECT
:
1211 proxy
->gfselect
= val
;
1213 case VIRTIO_PCI_COMMON_GF
:
1214 if (proxy
->gfselect
< ARRAY_SIZE(proxy
->guest_features
)) {
1215 proxy
->guest_features
[proxy
->gfselect
] = val
;
1216 virtio_set_features(vdev
,
1217 (((uint64_t)proxy
->guest_features
[1]) << 32) |
1218 proxy
->guest_features
[0]);
1221 case VIRTIO_PCI_COMMON_MSIX
:
1222 msix_vector_unuse(&proxy
->pci_dev
, vdev
->config_vector
);
1223 /* Make it possible for guest to discover an error took place. */
1224 if (msix_vector_use(&proxy
->pci_dev
, val
) < 0) {
1225 val
= VIRTIO_NO_VECTOR
;
1227 vdev
->config_vector
= val
;
1229 case VIRTIO_PCI_COMMON_STATUS
:
1230 if (!(val
& VIRTIO_CONFIG_S_DRIVER_OK
)) {
1231 virtio_pci_stop_ioeventfd(proxy
);
1234 virtio_set_status(vdev
, val
& 0xFF);
1236 if (val
& VIRTIO_CONFIG_S_DRIVER_OK
) {
1237 virtio_pci_start_ioeventfd(proxy
);
1240 if (vdev
->status
== 0) {
1241 virtio_pci_reset(DEVICE(proxy
));
1245 case VIRTIO_PCI_COMMON_Q_SELECT
:
1246 if (val
< VIRTIO_QUEUE_MAX
) {
1247 vdev
->queue_sel
= val
;
1250 case VIRTIO_PCI_COMMON_Q_SIZE
:
1251 proxy
->vqs
[vdev
->queue_sel
].num
= val
;
1253 case VIRTIO_PCI_COMMON_Q_MSIX
:
1254 msix_vector_unuse(&proxy
->pci_dev
,
1255 virtio_queue_vector(vdev
, vdev
->queue_sel
));
1256 /* Make it possible for guest to discover an error took place. */
1257 if (msix_vector_use(&proxy
->pci_dev
, val
) < 0) {
1258 val
= VIRTIO_NO_VECTOR
;
1260 virtio_queue_set_vector(vdev
, vdev
->queue_sel
, val
);
1262 case VIRTIO_PCI_COMMON_Q_ENABLE
:
1263 virtio_queue_set_num(vdev
, vdev
->queue_sel
,
1264 proxy
->vqs
[vdev
->queue_sel
].num
);
1265 virtio_queue_set_rings(vdev
, vdev
->queue_sel
,
1266 ((uint64_t)proxy
->vqs
[vdev
->queue_sel
].desc
[1]) << 32 |
1267 proxy
->vqs
[vdev
->queue_sel
].desc
[0],
1268 ((uint64_t)proxy
->vqs
[vdev
->queue_sel
].avail
[1]) << 32 |
1269 proxy
->vqs
[vdev
->queue_sel
].avail
[0],
1270 ((uint64_t)proxy
->vqs
[vdev
->queue_sel
].used
[1]) << 32 |
1271 proxy
->vqs
[vdev
->queue_sel
].used
[0]);
1272 proxy
->vqs
[vdev
->queue_sel
].enabled
= 1;
1274 case VIRTIO_PCI_COMMON_Q_DESCLO
:
1275 proxy
->vqs
[vdev
->queue_sel
].desc
[0] = val
;
1277 case VIRTIO_PCI_COMMON_Q_DESCHI
:
1278 proxy
->vqs
[vdev
->queue_sel
].desc
[1] = val
;
1280 case VIRTIO_PCI_COMMON_Q_AVAILLO
:
1281 proxy
->vqs
[vdev
->queue_sel
].avail
[0] = val
;
1283 case VIRTIO_PCI_COMMON_Q_AVAILHI
:
1284 proxy
->vqs
[vdev
->queue_sel
].avail
[1] = val
;
1286 case VIRTIO_PCI_COMMON_Q_USEDLO
:
1287 proxy
->vqs
[vdev
->queue_sel
].used
[0] = val
;
1289 case VIRTIO_PCI_COMMON_Q_USEDHI
:
1290 proxy
->vqs
[vdev
->queue_sel
].used
[1] = val
;
1298 static uint64_t virtio_pci_notify_read(void *opaque
, hwaddr addr
,
1304 static void virtio_pci_notify_write(void *opaque
, hwaddr addr
,
1305 uint64_t val
, unsigned size
)
1307 VirtIODevice
*vdev
= opaque
;
1308 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(DEVICE(vdev
)->parent_bus
->parent
);
1309 unsigned queue
= addr
/ virtio_pci_queue_mem_mult(proxy
);
1311 if (queue
< VIRTIO_QUEUE_MAX
) {
1312 virtio_queue_notify(vdev
, queue
);
1316 static void virtio_pci_notify_write_pio(void *opaque
, hwaddr addr
,
1317 uint64_t val
, unsigned size
)
1319 VirtIODevice
*vdev
= opaque
;
1320 unsigned queue
= val
;
1322 if (queue
< VIRTIO_QUEUE_MAX
) {
1323 virtio_queue_notify(vdev
, queue
);
1327 static uint64_t virtio_pci_isr_read(void *opaque
, hwaddr addr
,
1330 VirtIOPCIProxy
*proxy
= opaque
;
1331 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
1332 uint64_t val
= atomic_xchg(&vdev
->isr
, 0);
1333 pci_irq_deassert(&proxy
->pci_dev
);
1338 static void virtio_pci_isr_write(void *opaque
, hwaddr addr
,
1339 uint64_t val
, unsigned size
)
1343 static uint64_t virtio_pci_device_read(void *opaque
, hwaddr addr
,
1346 VirtIODevice
*vdev
= opaque
;
1351 val
= virtio_config_modern_readb(vdev
, addr
);
1354 val
= virtio_config_modern_readw(vdev
, addr
);
1357 val
= virtio_config_modern_readl(vdev
, addr
);
1363 static void virtio_pci_device_write(void *opaque
, hwaddr addr
,
1364 uint64_t val
, unsigned size
)
1366 VirtIODevice
*vdev
= opaque
;
1369 virtio_config_modern_writeb(vdev
, addr
, val
);
1372 virtio_config_modern_writew(vdev
, addr
, val
);
1375 virtio_config_modern_writel(vdev
, addr
, val
);
1380 static void virtio_pci_modern_regions_init(VirtIOPCIProxy
*proxy
)
1382 static const MemoryRegionOps common_ops
= {
1383 .read
= virtio_pci_common_read
,
1384 .write
= virtio_pci_common_write
,
1386 .min_access_size
= 1,
1387 .max_access_size
= 4,
1389 .endianness
= DEVICE_LITTLE_ENDIAN
,
1391 static const MemoryRegionOps isr_ops
= {
1392 .read
= virtio_pci_isr_read
,
1393 .write
= virtio_pci_isr_write
,
1395 .min_access_size
= 1,
1396 .max_access_size
= 4,
1398 .endianness
= DEVICE_LITTLE_ENDIAN
,
1400 static const MemoryRegionOps device_ops
= {
1401 .read
= virtio_pci_device_read
,
1402 .write
= virtio_pci_device_write
,
1404 .min_access_size
= 1,
1405 .max_access_size
= 4,
1407 .endianness
= DEVICE_LITTLE_ENDIAN
,
1409 static const MemoryRegionOps notify_ops
= {
1410 .read
= virtio_pci_notify_read
,
1411 .write
= virtio_pci_notify_write
,
1413 .min_access_size
= 1,
1414 .max_access_size
= 4,
1416 .endianness
= DEVICE_LITTLE_ENDIAN
,
1418 static const MemoryRegionOps notify_pio_ops
= {
1419 .read
= virtio_pci_notify_read
,
1420 .write
= virtio_pci_notify_write_pio
,
1422 .min_access_size
= 1,
1423 .max_access_size
= 4,
1425 .endianness
= DEVICE_LITTLE_ENDIAN
,
1429 memory_region_init_io(&proxy
->common
.mr
, OBJECT(proxy
),
1432 "virtio-pci-common",
1433 proxy
->common
.size
);
1435 memory_region_init_io(&proxy
->isr
.mr
, OBJECT(proxy
),
1441 memory_region_init_io(&proxy
->device
.mr
, OBJECT(proxy
),
1443 virtio_bus_get_device(&proxy
->bus
),
1444 "virtio-pci-device",
1445 proxy
->device
.size
);
1447 memory_region_init_io(&proxy
->notify
.mr
, OBJECT(proxy
),
1449 virtio_bus_get_device(&proxy
->bus
),
1450 "virtio-pci-notify",
1451 proxy
->notify
.size
);
1453 memory_region_init_io(&proxy
->notify_pio
.mr
, OBJECT(proxy
),
1455 virtio_bus_get_device(&proxy
->bus
),
1456 "virtio-pci-notify-pio",
1457 proxy
->notify_pio
.size
);
1460 static void virtio_pci_modern_region_map(VirtIOPCIProxy
*proxy
,
1461 VirtIOPCIRegion
*region
,
1462 struct virtio_pci_cap
*cap
,
1466 memory_region_add_subregion(mr
, region
->offset
, ®ion
->mr
);
1468 cap
->cfg_type
= region
->type
;
1470 cap
->offset
= cpu_to_le32(region
->offset
);
1471 cap
->length
= cpu_to_le32(region
->size
);
1472 virtio_pci_add_mem_cap(proxy
, cap
);
1476 static void virtio_pci_modern_mem_region_map(VirtIOPCIProxy
*proxy
,
1477 VirtIOPCIRegion
*region
,
1478 struct virtio_pci_cap
*cap
)
1480 virtio_pci_modern_region_map(proxy
, region
, cap
,
1481 &proxy
->modern_bar
, proxy
->modern_mem_bar_idx
);
1484 static void virtio_pci_modern_io_region_map(VirtIOPCIProxy
*proxy
,
1485 VirtIOPCIRegion
*region
,
1486 struct virtio_pci_cap
*cap
)
1488 virtio_pci_modern_region_map(proxy
, region
, cap
,
1489 &proxy
->io_bar
, proxy
->modern_io_bar_idx
);
1492 static void virtio_pci_modern_mem_region_unmap(VirtIOPCIProxy
*proxy
,
1493 VirtIOPCIRegion
*region
)
1495 memory_region_del_subregion(&proxy
->modern_bar
,
1499 static void virtio_pci_modern_io_region_unmap(VirtIOPCIProxy
*proxy
,
1500 VirtIOPCIRegion
*region
)
1502 memory_region_del_subregion(&proxy
->io_bar
,
1506 static void virtio_pci_pre_plugged(DeviceState
*d
, Error
**errp
)
1508 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(d
);
1509 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
1511 if (virtio_pci_modern(proxy
)) {
1512 virtio_add_feature(&vdev
->host_features
, VIRTIO_F_VERSION_1
);
1515 virtio_add_feature(&vdev
->host_features
, VIRTIO_F_BAD_FEATURE
);
1518 /* This is called by virtio-bus just after the device is plugged. */
1519 static void virtio_pci_device_plugged(DeviceState
*d
, Error
**errp
)
1521 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(d
);
1522 VirtioBusState
*bus
= &proxy
->bus
;
1523 bool legacy
= virtio_pci_legacy(proxy
);
1525 bool modern_pio
= proxy
->flags
& VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY
;
1528 VirtIODevice
*vdev
= virtio_bus_get_device(&proxy
->bus
);
1531 * Virtio capabilities present without
1532 * VIRTIO_F_VERSION_1 confuses guests
1534 if (!proxy
->ignore_backend_features
&&
1535 !virtio_has_feature(vdev
->host_features
, VIRTIO_F_VERSION_1
)) {
1536 virtio_pci_disable_modern(proxy
);
1539 error_setg(errp
, "Device doesn't support modern mode, and legacy"
1540 " mode is disabled");
1541 error_append_hint(errp
, "Set disable-legacy to off\n");
1547 modern
= virtio_pci_modern(proxy
);
1549 config
= proxy
->pci_dev
.config
;
1550 if (proxy
->class_code
) {
1551 pci_config_set_class(config
, proxy
->class_code
);
1555 if (virtio_host_has_feature(vdev
, VIRTIO_F_IOMMU_PLATFORM
)) {
1556 error_setg(errp
, "VIRTIO_F_IOMMU_PLATFORM was supported by"
1557 " neither legacy nor transitional device");
1561 * Legacy and transitional devices use specific subsystem IDs.
1562 * Note that the subsystem vendor ID (config + PCI_SUBSYSTEM_VENDOR_ID)
1563 * is set to PCI_SUBVENDOR_ID_REDHAT_QUMRANET by default.
1565 pci_set_word(config
+ PCI_SUBSYSTEM_ID
, virtio_bus_get_vdev_id(bus
));
1567 /* pure virtio-1.0 */
1568 pci_set_word(config
+ PCI_VENDOR_ID
,
1569 PCI_VENDOR_ID_REDHAT_QUMRANET
);
1570 pci_set_word(config
+ PCI_DEVICE_ID
,
1571 0x1040 + virtio_bus_get_vdev_id(bus
));
1572 pci_config_set_revision(config
, 1);
1574 config
[PCI_INTERRUPT_PIN
] = 1;
1578 struct virtio_pci_cap cap
= {
1579 .cap_len
= sizeof cap
,
1581 struct virtio_pci_notify_cap notify
= {
1582 .cap
.cap_len
= sizeof notify
,
1583 .notify_off_multiplier
=
1584 cpu_to_le32(virtio_pci_queue_mem_mult(proxy
)),
1586 struct virtio_pci_cfg_cap cfg
= {
1587 .cap
.cap_len
= sizeof cfg
,
1588 .cap
.cfg_type
= VIRTIO_PCI_CAP_PCI_CFG
,
1590 struct virtio_pci_notify_cap notify_pio
= {
1591 .cap
.cap_len
= sizeof notify
,
1592 .notify_off_multiplier
= cpu_to_le32(0x0),
1595 struct virtio_pci_cfg_cap
*cfg_mask
;
1597 virtio_pci_modern_regions_init(proxy
);
1599 virtio_pci_modern_mem_region_map(proxy
, &proxy
->common
, &cap
);
1600 virtio_pci_modern_mem_region_map(proxy
, &proxy
->isr
, &cap
);
1601 virtio_pci_modern_mem_region_map(proxy
, &proxy
->device
, &cap
);
1602 virtio_pci_modern_mem_region_map(proxy
, &proxy
->notify
, ¬ify
.cap
);
1605 memory_region_init(&proxy
->io_bar
, OBJECT(proxy
),
1606 "virtio-pci-io", 0x4);
1608 pci_register_bar(&proxy
->pci_dev
, proxy
->modern_io_bar_idx
,
1609 PCI_BASE_ADDRESS_SPACE_IO
, &proxy
->io_bar
);
1611 virtio_pci_modern_io_region_map(proxy
, &proxy
->notify_pio
,
1615 pci_register_bar(&proxy
->pci_dev
, proxy
->modern_mem_bar_idx
,
1616 PCI_BASE_ADDRESS_SPACE_MEMORY
|
1617 PCI_BASE_ADDRESS_MEM_PREFETCH
|
1618 PCI_BASE_ADDRESS_MEM_TYPE_64
,
1619 &proxy
->modern_bar
);
1621 proxy
->config_cap
= virtio_pci_add_mem_cap(proxy
, &cfg
.cap
);
1622 cfg_mask
= (void *)(proxy
->pci_dev
.wmask
+ proxy
->config_cap
);
1623 pci_set_byte(&cfg_mask
->cap
.bar
, ~0x0);
1624 pci_set_long((uint8_t *)&cfg_mask
->cap
.offset
, ~0x0);
1625 pci_set_long((uint8_t *)&cfg_mask
->cap
.length
, ~0x0);
1626 pci_set_long(cfg_mask
->pci_cfg_data
, ~0x0);
1629 if (proxy
->nvectors
) {
1630 int err
= msix_init_exclusive_bar(&proxy
->pci_dev
, proxy
->nvectors
,
1631 proxy
->msix_bar_idx
, NULL
);
1633 /* Notice when a system that supports MSIx can't initialize it */
1634 if (err
!= -ENOTSUP
) {
1635 warn_report("unable to init msix vectors to %" PRIu32
,
1638 proxy
->nvectors
= 0;
1642 proxy
->pci_dev
.config_write
= virtio_write_config
;
1643 proxy
->pci_dev
.config_read
= virtio_read_config
;
1646 size
= VIRTIO_PCI_REGION_SIZE(&proxy
->pci_dev
)
1647 + virtio_bus_get_vdev_config_len(bus
);
1648 size
= pow2ceil(size
);
1650 memory_region_init_io(&proxy
->bar
, OBJECT(proxy
),
1651 &virtio_pci_config_ops
,
1652 proxy
, "virtio-pci", size
);
1654 pci_register_bar(&proxy
->pci_dev
, proxy
->legacy_io_bar_idx
,
1655 PCI_BASE_ADDRESS_SPACE_IO
, &proxy
->bar
);
1659 static void virtio_pci_device_unplugged(DeviceState
*d
)
1661 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(d
);
1662 bool modern
= virtio_pci_modern(proxy
);
1663 bool modern_pio
= proxy
->flags
& VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY
;
1665 virtio_pci_stop_ioeventfd(proxy
);
1668 virtio_pci_modern_mem_region_unmap(proxy
, &proxy
->common
);
1669 virtio_pci_modern_mem_region_unmap(proxy
, &proxy
->isr
);
1670 virtio_pci_modern_mem_region_unmap(proxy
, &proxy
->device
);
1671 virtio_pci_modern_mem_region_unmap(proxy
, &proxy
->notify
);
1673 virtio_pci_modern_io_region_unmap(proxy
, &proxy
->notify_pio
);
1678 static void virtio_pci_realize(PCIDevice
*pci_dev
, Error
**errp
)
1680 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(pci_dev
);
1681 VirtioPCIClass
*k
= VIRTIO_PCI_GET_CLASS(pci_dev
);
1682 bool pcie_port
= pci_bus_is_express(pci_get_bus(pci_dev
)) &&
1683 !pci_bus_is_root(pci_get_bus(pci_dev
));
1685 if (kvm_enabled() && !kvm_has_many_ioeventfds()) {
1686 proxy
->flags
&= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD
;
1690 * virtio pci bar layout used by default.
1691 * subclasses can re-arrange things if needed.
1693 * region 0 -- virtio legacy io bar
1694 * region 1 -- msi-x bar
1695 * region 4+5 -- virtio modern memory (64bit) bar
1698 proxy
->legacy_io_bar_idx
= 0;
1699 proxy
->msix_bar_idx
= 1;
1700 proxy
->modern_io_bar_idx
= 2;
1701 proxy
->modern_mem_bar_idx
= 4;
1703 proxy
->common
.offset
= 0x0;
1704 proxy
->common
.size
= 0x1000;
1705 proxy
->common
.type
= VIRTIO_PCI_CAP_COMMON_CFG
;
1707 proxy
->isr
.offset
= 0x1000;
1708 proxy
->isr
.size
= 0x1000;
1709 proxy
->isr
.type
= VIRTIO_PCI_CAP_ISR_CFG
;
1711 proxy
->device
.offset
= 0x2000;
1712 proxy
->device
.size
= 0x1000;
1713 proxy
->device
.type
= VIRTIO_PCI_CAP_DEVICE_CFG
;
1715 proxy
->notify
.offset
= 0x3000;
1716 proxy
->notify
.size
= virtio_pci_queue_mem_mult(proxy
) * VIRTIO_QUEUE_MAX
;
1717 proxy
->notify
.type
= VIRTIO_PCI_CAP_NOTIFY_CFG
;
1719 proxy
->notify_pio
.offset
= 0x0;
1720 proxy
->notify_pio
.size
= 0x4;
1721 proxy
->notify_pio
.type
= VIRTIO_PCI_CAP_NOTIFY_CFG
;
1723 /* subclasses can enforce modern, so do this unconditionally */
1724 memory_region_init(&proxy
->modern_bar
, OBJECT(proxy
), "virtio-pci",
1725 /* PCI BAR regions must be powers of 2 */
1726 pow2ceil(proxy
->notify
.offset
+ proxy
->notify
.size
));
1728 if (proxy
->disable_legacy
== ON_OFF_AUTO_AUTO
) {
1729 proxy
->disable_legacy
= pcie_port
? ON_OFF_AUTO_ON
: ON_OFF_AUTO_OFF
;
1732 if (!virtio_pci_modern(proxy
) && !virtio_pci_legacy(proxy
)) {
1733 error_setg(errp
, "device cannot work as neither modern nor legacy mode"
1735 error_append_hint(errp
, "Set either disable-modern or disable-legacy"
1740 if (pcie_port
&& pci_is_express(pci_dev
)) {
1743 pos
= pcie_endpoint_cap_init(pci_dev
, 0);
1746 pos
= pci_add_capability(pci_dev
, PCI_CAP_ID_PM
, 0,
1747 PCI_PM_SIZEOF
, errp
);
1752 pci_dev
->exp
.pm_cap
= pos
;
1755 * Indicates that this function complies with revision 1.2 of the
1756 * PCI Power Management Interface Specification.
1758 pci_set_word(pci_dev
->config
+ pos
+ PCI_PM_PMC
, 0x3);
1760 if (proxy
->flags
& VIRTIO_PCI_FLAG_INIT_DEVERR
) {
1761 /* Init error enabling flags */
1762 pcie_cap_deverr_init(pci_dev
);
1765 if (proxy
->flags
& VIRTIO_PCI_FLAG_INIT_LNKCTL
) {
1766 /* Init Link Control Register */
1767 pcie_cap_lnkctl_init(pci_dev
);
1770 if (proxy
->flags
& VIRTIO_PCI_FLAG_INIT_PM
) {
1771 /* Init Power Management Control Register */
1772 pci_set_word(pci_dev
->wmask
+ pos
+ PCI_PM_CTRL
,
1773 PCI_PM_CTRL_STATE_MASK
);
1776 if (proxy
->flags
& VIRTIO_PCI_FLAG_ATS
) {
1777 pcie_ats_init(pci_dev
, 256);
1782 * make future invocations of pci_is_express() return false
1783 * and pci_config_size() return PCI_CONFIG_SPACE_SIZE.
1785 pci_dev
->cap_present
&= ~QEMU_PCI_CAP_EXPRESS
;
1788 virtio_pci_bus_new(&proxy
->bus
, sizeof(proxy
->bus
), proxy
);
1790 k
->realize(proxy
, errp
);
1794 static void virtio_pci_exit(PCIDevice
*pci_dev
)
1796 msix_uninit_exclusive_bar(pci_dev
);
1799 static void virtio_pci_reset(DeviceState
*qdev
)
1801 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(qdev
);
1802 VirtioBusState
*bus
= VIRTIO_BUS(&proxy
->bus
);
1803 PCIDevice
*dev
= PCI_DEVICE(qdev
);
1806 virtio_pci_stop_ioeventfd(proxy
);
1807 virtio_bus_reset(bus
);
1808 msix_unuse_all_vectors(&proxy
->pci_dev
);
1810 for (i
= 0; i
< VIRTIO_QUEUE_MAX
; i
++) {
1811 proxy
->vqs
[i
].enabled
= 0;
1812 proxy
->vqs
[i
].num
= 0;
1813 proxy
->vqs
[i
].desc
[0] = proxy
->vqs
[i
].desc
[1] = 0;
1814 proxy
->vqs
[i
].avail
[0] = proxy
->vqs
[i
].avail
[1] = 0;
1815 proxy
->vqs
[i
].used
[0] = proxy
->vqs
[i
].used
[1] = 0;
1818 if (pci_is_express(dev
)) {
1819 pcie_cap_deverr_reset(dev
);
1820 pcie_cap_lnkctl_reset(dev
);
1822 pci_set_word(dev
->config
+ dev
->exp
.pm_cap
+ PCI_PM_CTRL
, 0);
1826 static Property virtio_pci_properties
[] = {
1827 DEFINE_PROP_BIT("virtio-pci-bus-master-bug-migration", VirtIOPCIProxy
, flags
,
1828 VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT
, false),
1829 DEFINE_PROP_BIT("migrate-extra", VirtIOPCIProxy
, flags
,
1830 VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT
, true),
1831 DEFINE_PROP_BIT("modern-pio-notify", VirtIOPCIProxy
, flags
,
1832 VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT
, false),
1833 DEFINE_PROP_BIT("x-disable-pcie", VirtIOPCIProxy
, flags
,
1834 VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT
, false),
1835 DEFINE_PROP_BIT("page-per-vq", VirtIOPCIProxy
, flags
,
1836 VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT
, false),
1837 DEFINE_PROP_BOOL("x-ignore-backend-features", VirtIOPCIProxy
,
1838 ignore_backend_features
, false),
1839 DEFINE_PROP_BIT("ats", VirtIOPCIProxy
, flags
,
1840 VIRTIO_PCI_FLAG_ATS_BIT
, false),
1841 DEFINE_PROP_BIT("x-pcie-deverr-init", VirtIOPCIProxy
, flags
,
1842 VIRTIO_PCI_FLAG_INIT_DEVERR_BIT
, true),
1843 DEFINE_PROP_BIT("x-pcie-lnkctl-init", VirtIOPCIProxy
, flags
,
1844 VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT
, true),
1845 DEFINE_PROP_BIT("x-pcie-pm-init", VirtIOPCIProxy
, flags
,
1846 VIRTIO_PCI_FLAG_INIT_PM_BIT
, true),
1847 DEFINE_PROP_END_OF_LIST(),
1850 static void virtio_pci_dc_realize(DeviceState
*qdev
, Error
**errp
)
1852 VirtioPCIClass
*vpciklass
= VIRTIO_PCI_GET_CLASS(qdev
);
1853 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(qdev
);
1854 PCIDevice
*pci_dev
= &proxy
->pci_dev
;
1856 if (!(proxy
->flags
& VIRTIO_PCI_FLAG_DISABLE_PCIE
) &&
1857 virtio_pci_modern(proxy
)) {
1858 pci_dev
->cap_present
|= QEMU_PCI_CAP_EXPRESS
;
1861 vpciklass
->parent_dc_realize(qdev
, errp
);
1864 static void virtio_pci_class_init(ObjectClass
*klass
, void *data
)
1866 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1867 PCIDeviceClass
*k
= PCI_DEVICE_CLASS(klass
);
1868 VirtioPCIClass
*vpciklass
= VIRTIO_PCI_CLASS(klass
);
1870 dc
->props
= virtio_pci_properties
;
1871 k
->realize
= virtio_pci_realize
;
1872 k
->exit
= virtio_pci_exit
;
1873 k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
1874 k
->revision
= VIRTIO_PCI_ABI_VERSION
;
1875 k
->class_id
= PCI_CLASS_OTHERS
;
1876 device_class_set_parent_realize(dc
, virtio_pci_dc_realize
,
1877 &vpciklass
->parent_dc_realize
);
1878 dc
->reset
= virtio_pci_reset
;
1881 static const TypeInfo virtio_pci_info
= {
1882 .name
= TYPE_VIRTIO_PCI
,
1883 .parent
= TYPE_PCI_DEVICE
,
1884 .instance_size
= sizeof(VirtIOPCIProxy
),
1885 .class_init
= virtio_pci_class_init
,
1886 .class_size
= sizeof(VirtioPCIClass
),
1890 static Property virtio_pci_generic_properties
[] = {
1891 DEFINE_PROP_ON_OFF_AUTO("disable-legacy", VirtIOPCIProxy
, disable_legacy
,
1893 DEFINE_PROP_BOOL("disable-modern", VirtIOPCIProxy
, disable_modern
, false),
1894 DEFINE_PROP_END_OF_LIST(),
1897 static void virtio_pci_base_class_init(ObjectClass
*klass
, void *data
)
1899 const VirtioPCIDeviceTypeInfo
*t
= data
;
1900 if (t
->class_init
) {
1901 t
->class_init(klass
, NULL
);
1905 static void virtio_pci_generic_class_init(ObjectClass
*klass
, void *data
)
1907 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1909 dc
->props
= virtio_pci_generic_properties
;
1912 /* Used when the generic type and the base type is the same */
1913 static void virtio_pci_generic_base_class_init(ObjectClass
*klass
, void *data
)
1915 virtio_pci_base_class_init(klass
, data
);
1916 virtio_pci_generic_class_init(klass
, NULL
);
1919 static void virtio_pci_transitional_instance_init(Object
*obj
)
1921 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(obj
);
1923 proxy
->disable_legacy
= ON_OFF_AUTO_OFF
;
1924 proxy
->disable_modern
= false;
1927 static void virtio_pci_non_transitional_instance_init(Object
*obj
)
1929 VirtIOPCIProxy
*proxy
= VIRTIO_PCI(obj
);
1931 proxy
->disable_legacy
= ON_OFF_AUTO_ON
;
1932 proxy
->disable_modern
= false;
1935 void virtio_pci_types_register(const VirtioPCIDeviceTypeInfo
*t
)
1937 TypeInfo base_type_info
= {
1938 .name
= t
->base_name
,
1939 .parent
= t
->parent
? t
->parent
: TYPE_VIRTIO_PCI
,
1940 .instance_size
= t
->instance_size
,
1941 .instance_init
= t
->instance_init
,
1942 .class_init
= virtio_pci_base_class_init
,
1943 .class_data
= (void *)t
,
1946 TypeInfo generic_type_info
= {
1947 .name
= t
->generic_name
,
1948 .parent
= base_type_info
.name
,
1949 .class_init
= virtio_pci_generic_class_init
,
1950 .interfaces
= (InterfaceInfo
[]) {
1951 { INTERFACE_PCIE_DEVICE
},
1952 { INTERFACE_CONVENTIONAL_PCI_DEVICE
},
1957 if (!base_type_info
.name
) {
1958 /* No base type -> register a single generic device type */
1959 base_type_info
.name
= t
->generic_name
;
1960 base_type_info
.class_init
= virtio_pci_generic_base_class_init
;
1961 base_type_info
.interfaces
= generic_type_info
.interfaces
;
1962 base_type_info
.abstract
= false;
1963 generic_type_info
.name
= NULL
;
1964 assert(!t
->non_transitional_name
);
1965 assert(!t
->transitional_name
);
1968 type_register(&base_type_info
);
1969 if (generic_type_info
.name
) {
1970 type_register(&generic_type_info
);
1973 if (t
->non_transitional_name
) {
1974 const TypeInfo non_transitional_type_info
= {
1975 .name
= t
->non_transitional_name
,
1976 .parent
= base_type_info
.name
,
1977 .instance_init
= virtio_pci_non_transitional_instance_init
,
1978 .interfaces
= (InterfaceInfo
[]) {
1979 { INTERFACE_PCIE_DEVICE
},
1980 { INTERFACE_CONVENTIONAL_PCI_DEVICE
},
1984 type_register(&non_transitional_type_info
);
1987 if (t
->transitional_name
) {
1988 const TypeInfo transitional_type_info
= {
1989 .name
= t
->transitional_name
,
1990 .parent
= base_type_info
.name
,
1991 .instance_init
= virtio_pci_transitional_instance_init
,
1992 .interfaces
= (InterfaceInfo
[]) {
1994 * Transitional virtio devices work only as Conventional PCI
1995 * devices because they require PIO ports.
1997 { INTERFACE_CONVENTIONAL_PCI_DEVICE
},
2001 type_register(&transitional_type_info
);
2005 /* virtio-blk-pci */
2007 static Property virtio_blk_pci_properties
[] = {
2008 DEFINE_PROP_UINT32("class", VirtIOPCIProxy
, class_code
, 0),
2009 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
,
2010 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, true),
2011 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
,
2012 DEV_NVECTORS_UNSPECIFIED
),
2013 DEFINE_PROP_END_OF_LIST(),
2016 static void virtio_blk_pci_realize(VirtIOPCIProxy
*vpci_dev
, Error
**errp
)
2018 VirtIOBlkPCI
*dev
= VIRTIO_BLK_PCI(vpci_dev
);
2019 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
2021 if (vpci_dev
->nvectors
== DEV_NVECTORS_UNSPECIFIED
) {
2022 vpci_dev
->nvectors
= dev
->vdev
.conf
.num_queues
+ 1;
2025 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
2026 object_property_set_bool(OBJECT(vdev
), true, "realized", errp
);
2029 static void virtio_blk_pci_class_init(ObjectClass
*klass
, void *data
)
2031 DeviceClass
*dc
= DEVICE_CLASS(klass
);
2032 VirtioPCIClass
*k
= VIRTIO_PCI_CLASS(klass
);
2033 PCIDeviceClass
*pcidev_k
= PCI_DEVICE_CLASS(klass
);
2035 set_bit(DEVICE_CATEGORY_STORAGE
, dc
->categories
);
2036 dc
->props
= virtio_blk_pci_properties
;
2037 k
->realize
= virtio_blk_pci_realize
;
2038 pcidev_k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
2039 pcidev_k
->device_id
= PCI_DEVICE_ID_VIRTIO_BLOCK
;
2040 pcidev_k
->revision
= VIRTIO_PCI_ABI_VERSION
;
2041 pcidev_k
->class_id
= PCI_CLASS_STORAGE_SCSI
;
2044 static void virtio_blk_pci_instance_init(Object
*obj
)
2046 VirtIOBlkPCI
*dev
= VIRTIO_BLK_PCI(obj
);
2048 virtio_instance_init_common(obj
, &dev
->vdev
, sizeof(dev
->vdev
),
2050 object_property_add_alias(obj
, "bootindex", OBJECT(&dev
->vdev
),
2051 "bootindex", &error_abort
);
2054 static const VirtioPCIDeviceTypeInfo virtio_blk_pci_info
= {
2055 .base_name
= TYPE_VIRTIO_BLK_PCI
,
2056 .generic_name
= "virtio-blk-pci",
2057 .transitional_name
= "virtio-blk-pci-transitional",
2058 .non_transitional_name
= "virtio-blk-pci-non-transitional",
2059 .instance_size
= sizeof(VirtIOBlkPCI
),
2060 .instance_init
= virtio_blk_pci_instance_init
,
2061 .class_init
= virtio_blk_pci_class_init
,
2064 /* virtio-scsi-pci */
2066 static Property virtio_scsi_pci_properties
[] = {
2067 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
,
2068 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, true),
2069 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
,
2070 DEV_NVECTORS_UNSPECIFIED
),
2071 DEFINE_PROP_END_OF_LIST(),
2074 static void virtio_scsi_pci_realize(VirtIOPCIProxy
*vpci_dev
, Error
**errp
)
2076 VirtIOSCSIPCI
*dev
= VIRTIO_SCSI_PCI(vpci_dev
);
2077 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
2078 VirtIOSCSICommon
*vs
= VIRTIO_SCSI_COMMON(vdev
);
2079 DeviceState
*proxy
= DEVICE(vpci_dev
);
2082 if (vpci_dev
->nvectors
== DEV_NVECTORS_UNSPECIFIED
) {
2083 vpci_dev
->nvectors
= vs
->conf
.num_queues
+ 3;
2087 * For command line compatibility, this sets the virtio-scsi-device bus
2091 bus_name
= g_strdup_printf("%s.0", proxy
->id
);
2092 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev
), bus_name
);
2096 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
2097 object_property_set_bool(OBJECT(vdev
), true, "realized", errp
);
2100 static void virtio_scsi_pci_class_init(ObjectClass
*klass
, void *data
)
2102 DeviceClass
*dc
= DEVICE_CLASS(klass
);
2103 VirtioPCIClass
*k
= VIRTIO_PCI_CLASS(klass
);
2104 PCIDeviceClass
*pcidev_k
= PCI_DEVICE_CLASS(klass
);
2106 k
->realize
= virtio_scsi_pci_realize
;
2107 set_bit(DEVICE_CATEGORY_STORAGE
, dc
->categories
);
2108 dc
->props
= virtio_scsi_pci_properties
;
2109 pcidev_k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
2110 pcidev_k
->device_id
= PCI_DEVICE_ID_VIRTIO_SCSI
;
2111 pcidev_k
->revision
= 0x00;
2112 pcidev_k
->class_id
= PCI_CLASS_STORAGE_SCSI
;
2115 static void virtio_scsi_pci_instance_init(Object
*obj
)
2117 VirtIOSCSIPCI
*dev
= VIRTIO_SCSI_PCI(obj
);
2119 virtio_instance_init_common(obj
, &dev
->vdev
, sizeof(dev
->vdev
),
2123 static const VirtioPCIDeviceTypeInfo virtio_scsi_pci_info
= {
2124 .base_name
= TYPE_VIRTIO_SCSI_PCI
,
2125 .generic_name
= "virtio-scsi-pci",
2126 .transitional_name
= "virtio-scsi-pci-transitional",
2127 .non_transitional_name
= "virtio-scsi-pci-non-transitional",
2128 .instance_size
= sizeof(VirtIOSCSIPCI
),
2129 .instance_init
= virtio_scsi_pci_instance_init
,
2130 .class_init
= virtio_scsi_pci_class_init
,
2133 /* vhost-scsi-pci */
2135 #ifdef CONFIG_VHOST_SCSI
2136 static Property vhost_scsi_pci_properties
[] = {
2137 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
,
2138 DEV_NVECTORS_UNSPECIFIED
),
2139 DEFINE_PROP_END_OF_LIST(),
2142 static void vhost_scsi_pci_realize(VirtIOPCIProxy
*vpci_dev
, Error
**errp
)
2144 VHostSCSIPCI
*dev
= VHOST_SCSI_PCI(vpci_dev
);
2145 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
2146 VirtIOSCSICommon
*vs
= VIRTIO_SCSI_COMMON(vdev
);
2148 if (vpci_dev
->nvectors
== DEV_NVECTORS_UNSPECIFIED
) {
2149 vpci_dev
->nvectors
= vs
->conf
.num_queues
+ 3;
2152 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
2153 object_property_set_bool(OBJECT(vdev
), true, "realized", errp
);
2156 static void vhost_scsi_pci_class_init(ObjectClass
*klass
, void *data
)
2158 DeviceClass
*dc
= DEVICE_CLASS(klass
);
2159 VirtioPCIClass
*k
= VIRTIO_PCI_CLASS(klass
);
2160 PCIDeviceClass
*pcidev_k
= PCI_DEVICE_CLASS(klass
);
2161 k
->realize
= vhost_scsi_pci_realize
;
2162 set_bit(DEVICE_CATEGORY_STORAGE
, dc
->categories
);
2163 dc
->props
= vhost_scsi_pci_properties
;
2164 pcidev_k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
2165 pcidev_k
->device_id
= PCI_DEVICE_ID_VIRTIO_SCSI
;
2166 pcidev_k
->revision
= 0x00;
2167 pcidev_k
->class_id
= PCI_CLASS_STORAGE_SCSI
;
2170 static void vhost_scsi_pci_instance_init(Object
*obj
)
2172 VHostSCSIPCI
*dev
= VHOST_SCSI_PCI(obj
);
2174 virtio_instance_init_common(obj
, &dev
->vdev
, sizeof(dev
->vdev
),
2176 object_property_add_alias(obj
, "bootindex", OBJECT(&dev
->vdev
),
2177 "bootindex", &error_abort
);
2180 static const VirtioPCIDeviceTypeInfo vhost_scsi_pci_info
= {
2181 .base_name
= TYPE_VHOST_SCSI_PCI
,
2182 .generic_name
= "vhost-scsi-pci",
2183 .transitional_name
= "vhost-scsi-pci-transitional",
2184 .non_transitional_name
= "vhost-scsi-pci-non-transitional",
2185 .instance_size
= sizeof(VHostSCSIPCI
),
2186 .instance_init
= vhost_scsi_pci_instance_init
,
2187 .class_init
= vhost_scsi_pci_class_init
,
2191 /* virtio-serial-pci */
2193 static void virtio_serial_pci_realize(VirtIOPCIProxy
*vpci_dev
, Error
**errp
)
2195 VirtIOSerialPCI
*dev
= VIRTIO_SERIAL_PCI(vpci_dev
);
2196 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
2197 DeviceState
*proxy
= DEVICE(vpci_dev
);
2200 if (vpci_dev
->class_code
!= PCI_CLASS_COMMUNICATION_OTHER
&&
2201 vpci_dev
->class_code
!= PCI_CLASS_DISPLAY_OTHER
&& /* qemu 0.10 */
2202 vpci_dev
->class_code
!= PCI_CLASS_OTHERS
) { /* qemu-kvm */
2203 vpci_dev
->class_code
= PCI_CLASS_COMMUNICATION_OTHER
;
2206 /* backwards-compatibility with machines that were created with
2207 DEV_NVECTORS_UNSPECIFIED */
2208 if (vpci_dev
->nvectors
== DEV_NVECTORS_UNSPECIFIED
) {
2209 vpci_dev
->nvectors
= dev
->vdev
.serial
.max_virtserial_ports
+ 1;
2213 * For command line compatibility, this sets the virtio-serial-device bus
2217 bus_name
= g_strdup_printf("%s.0", proxy
->id
);
2218 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev
), bus_name
);
2222 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
2223 object_property_set_bool(OBJECT(vdev
), true, "realized", errp
);
2226 static Property virtio_serial_pci_properties
[] = {
2227 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
,
2228 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, true),
2229 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
, 2),
2230 DEFINE_PROP_UINT32("class", VirtIOPCIProxy
, class_code
, 0),
2231 DEFINE_PROP_END_OF_LIST(),
2234 static void virtio_serial_pci_class_init(ObjectClass
*klass
, void *data
)
2236 DeviceClass
*dc
= DEVICE_CLASS(klass
);
2237 VirtioPCIClass
*k
= VIRTIO_PCI_CLASS(klass
);
2238 PCIDeviceClass
*pcidev_k
= PCI_DEVICE_CLASS(klass
);
2239 k
->realize
= virtio_serial_pci_realize
;
2240 set_bit(DEVICE_CATEGORY_INPUT
, dc
->categories
);
2241 dc
->props
= virtio_serial_pci_properties
;
2242 pcidev_k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
2243 pcidev_k
->device_id
= PCI_DEVICE_ID_VIRTIO_CONSOLE
;
2244 pcidev_k
->revision
= VIRTIO_PCI_ABI_VERSION
;
2245 pcidev_k
->class_id
= PCI_CLASS_COMMUNICATION_OTHER
;
2248 static void virtio_serial_pci_instance_init(Object
*obj
)
2250 VirtIOSerialPCI
*dev
= VIRTIO_SERIAL_PCI(obj
);
2252 virtio_instance_init_common(obj
, &dev
->vdev
, sizeof(dev
->vdev
),
2253 TYPE_VIRTIO_SERIAL
);
2256 static const VirtioPCIDeviceTypeInfo virtio_serial_pci_info
= {
2257 .base_name
= TYPE_VIRTIO_SERIAL_PCI
,
2258 .generic_name
= "virtio-serial-pci",
2259 .transitional_name
= "virtio-serial-pci-transitional",
2260 .non_transitional_name
= "virtio-serial-pci-non-transitional",
2261 .instance_size
= sizeof(VirtIOSerialPCI
),
2262 .instance_init
= virtio_serial_pci_instance_init
,
2263 .class_init
= virtio_serial_pci_class_init
,
2266 /* virtio-net-pci */
2268 static Property virtio_net_properties
[] = {
2269 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy
, flags
,
2270 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT
, true),
2271 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy
, nvectors
, 3),
2272 DEFINE_PROP_END_OF_LIST(),
2275 static void virtio_net_pci_realize(VirtIOPCIProxy
*vpci_dev
, Error
**errp
)
2277 DeviceState
*qdev
= DEVICE(vpci_dev
);
2278 VirtIONetPCI
*dev
= VIRTIO_NET_PCI(vpci_dev
);
2279 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
2281 virtio_net_set_netclient_name(&dev
->vdev
, qdev
->id
,
2282 object_get_typename(OBJECT(qdev
)));
2283 qdev_set_parent_bus(vdev
, BUS(&vpci_dev
->bus
));
2284 object_property_set_bool(OBJECT(vdev
), true, "realized", errp
);
2287 static void virtio_net_pci_class_init(ObjectClass
*klass
, void *data
)
2289 DeviceClass
*dc
= DEVICE_CLASS(klass
);
2290 PCIDeviceClass
*k
= PCI_DEVICE_CLASS(klass
);
2291 VirtioPCIClass
*vpciklass
= VIRTIO_PCI_CLASS(klass
);
2293 k
->romfile
= "efi-virtio.rom";
2294 k
->vendor_id
= PCI_VENDOR_ID_REDHAT_QUMRANET
;
2295 k
->device_id
= PCI_DEVICE_ID_VIRTIO_NET
;
2296 k
->revision
= VIRTIO_PCI_ABI_VERSION
;
2297 k
->class_id
= PCI_CLASS_NETWORK_ETHERNET
;
2298 set_bit(DEVICE_CATEGORY_NETWORK
, dc
->categories
);
2299 dc
->props
= virtio_net_properties
;
2300 vpciklass
->realize
= virtio_net_pci_realize
;
2303 static void virtio_net_pci_instance_init(Object
*obj
)
2305 VirtIONetPCI
*dev
= VIRTIO_NET_PCI(obj
);
2307 virtio_instance_init_common(obj
, &dev
->vdev
, sizeof(dev
->vdev
),
2309 object_property_add_alias(obj
, "bootindex", OBJECT(&dev
->vdev
),
2310 "bootindex", &error_abort
);
2313 static const VirtioPCIDeviceTypeInfo virtio_net_pci_info
= {
2314 .base_name
= TYPE_VIRTIO_NET_PCI
,
2315 .generic_name
= "virtio-net-pci",
2316 .transitional_name
= "virtio-net-pci-transitional",
2317 .non_transitional_name
= "virtio-net-pci-non-transitional",
2318 .instance_size
= sizeof(VirtIONetPCI
),
2319 .instance_init
= virtio_net_pci_instance_init
,
2320 .class_init
= virtio_net_pci_class_init
,
2323 /* virtio-pci-bus */
2325 static void virtio_pci_bus_new(VirtioBusState
*bus
, size_t bus_size
,
2326 VirtIOPCIProxy
*dev
)
2328 DeviceState
*qdev
= DEVICE(dev
);
2329 char virtio_bus_name
[] = "virtio-bus";
2331 qbus_create_inplace(bus
, bus_size
, TYPE_VIRTIO_PCI_BUS
, qdev
,
2335 static void virtio_pci_bus_class_init(ObjectClass
*klass
, void *data
)
2337 BusClass
*bus_class
= BUS_CLASS(klass
);
2338 VirtioBusClass
*k
= VIRTIO_BUS_CLASS(klass
);
2339 bus_class
->max_dev
= 1;
2340 k
->notify
= virtio_pci_notify
;
2341 k
->save_config
= virtio_pci_save_config
;
2342 k
->load_config
= virtio_pci_load_config
;
2343 k
->save_queue
= virtio_pci_save_queue
;
2344 k
->load_queue
= virtio_pci_load_queue
;
2345 k
->save_extra_state
= virtio_pci_save_extra_state
;
2346 k
->load_extra_state
= virtio_pci_load_extra_state
;
2347 k
->has_extra_state
= virtio_pci_has_extra_state
;
2348 k
->query_guest_notifiers
= virtio_pci_query_guest_notifiers
;
2349 k
->set_guest_notifiers
= virtio_pci_set_guest_notifiers
;
2350 k
->set_host_notifier_mr
= virtio_pci_set_host_notifier_mr
;
2351 k
->vmstate_change
= virtio_pci_vmstate_change
;
2352 k
->pre_plugged
= virtio_pci_pre_plugged
;
2353 k
->device_plugged
= virtio_pci_device_plugged
;
2354 k
->device_unplugged
= virtio_pci_device_unplugged
;
2355 k
->query_nvectors
= virtio_pci_query_nvectors
;
2356 k
->ioeventfd_enabled
= virtio_pci_ioeventfd_enabled
;
2357 k
->ioeventfd_assign
= virtio_pci_ioeventfd_assign
;
2358 k
->get_dma_as
= virtio_pci_get_dma_as
;
2361 static const TypeInfo virtio_pci_bus_info
= {
2362 .name
= TYPE_VIRTIO_PCI_BUS
,
2363 .parent
= TYPE_VIRTIO_BUS
,
2364 .instance_size
= sizeof(VirtioPCIBusState
),
2365 .class_init
= virtio_pci_bus_class_init
,
2368 static void virtio_pci_register_types(void)
2371 type_register_static(&virtio_pci_bus_info
);
2372 type_register_static(&virtio_pci_info
);
2374 /* Implementations: */
2375 virtio_pci_types_register(&virtio_blk_pci_info
);
2376 virtio_pci_types_register(&virtio_scsi_pci_info
);
2377 virtio_pci_types_register(&virtio_serial_pci_info
);
2378 virtio_pci_types_register(&virtio_net_pci_info
);
2379 #ifdef CONFIG_VHOST_SCSI
2380 virtio_pci_types_register(&vhost_scsi_pci_info
);
2384 type_init(virtio_pci_register_types
)