2 * Inter-VM Shared Memory PCI device.
5 * Cam Macdonell <cam@cs.ualberta.ca>
7 * Based On: cirrus_vga.c
8 * Copyright (c) 2004 Fabrice Bellard
9 * Copyright (c) 2004 Makoto Suzuki (suzu)
12 * Copyright (c) 2006 Igor Kovalenko
14 * This code is licensed under the GNU GPL v2.
16 * Contributions after 2012-01-13 are licensed under the terms of the
17 * GNU GPL, version 2 or (at your option) any later version.
20 #include "hw/i386/pc.h"
21 #include "hw/pci/pci.h"
22 #include "hw/pci/msix.h"
23 #include "sysemu/kvm.h"
24 #include "migration/migration.h"
25 #include "qemu/error-report.h"
26 #include "qemu/event_notifier.h"
27 #include "qemu/fifo8.h"
28 #include "sysemu/char.h"
31 #include <sys/types.h>
34 #define PCI_VENDOR_ID_IVSHMEM PCI_VENDOR_ID_REDHAT_QUMRANET
35 #define PCI_DEVICE_ID_IVSHMEM 0x1110
37 #define IVSHMEM_IOEVENTFD 0
40 #define IVSHMEM_PEER 0
41 #define IVSHMEM_MASTER 1
43 #define IVSHMEM_REG_BAR_SIZE 0x100
45 //#define DEBUG_IVSHMEM
47 #define IVSHMEM_DPRINTF(fmt, ...) \
48 do {printf("IVSHMEM: " fmt, ## __VA_ARGS__); } while (0)
50 #define IVSHMEM_DPRINTF(fmt, ...)
53 #define TYPE_IVSHMEM "ivshmem"
54 #define IVSHMEM(obj) \
55 OBJECT_CHECK(IVShmemState, (obj), TYPE_IVSHMEM)
59 EventNotifier
*eventfds
;
62 typedef struct EventfdEntry
{
67 typedef struct IVShmemState
{
76 CharDriverState
**eventfd_chr
;
77 CharDriverState
*server_chr
;
79 MemoryRegion ivshmem_mmio
;
81 /* We might need to register the BAR before we actually have the memory.
82 * So prepare a container MemoryRegion for the BAR immediately and
83 * add a subregion when we have the memory.
87 uint64_t ivshmem_size
; /* size of shared memory region */
88 uint32_t ivshmem_attr
;
89 uint32_t ivshmem_64bit
;
90 int shm_fd
; /* shared memory file descriptor */
93 int nb_peers
; /* how many guests we have space for */
94 int max_peer
; /* maximum numbered peer */
99 EventfdEntry
*eventfd_table
;
101 Error
*migration_blocker
;
106 int role_val
; /* scalar to avoid multiple string comparisons */
109 /* registers for the Inter-VM shared memory device */
110 enum ivshmem_registers
{
117 static inline uint32_t ivshmem_has_feature(IVShmemState
*ivs
,
118 unsigned int feature
) {
119 return (ivs
->features
& (1 << feature
));
122 static inline bool is_power_of_two(uint64_t x
) {
123 return (x
& (x
- 1)) == 0;
126 /* accessing registers - based on rtl8139 */
127 static void ivshmem_update_irq(IVShmemState
*s
, int val
)
129 PCIDevice
*d
= PCI_DEVICE(s
);
131 isr
= (s
->intrstatus
& s
->intrmask
) & 0xffffffff;
133 /* don't print ISR resets */
135 IVSHMEM_DPRINTF("Set IRQ to %d (%04x %04x)\n",
136 isr
? 1 : 0, s
->intrstatus
, s
->intrmask
);
139 pci_set_irq(d
, (isr
!= 0));
142 static void ivshmem_IntrMask_write(IVShmemState
*s
, uint32_t val
)
144 IVSHMEM_DPRINTF("IntrMask write(w) val = 0x%04x\n", val
);
148 ivshmem_update_irq(s
, val
);
151 static uint32_t ivshmem_IntrMask_read(IVShmemState
*s
)
153 uint32_t ret
= s
->intrmask
;
155 IVSHMEM_DPRINTF("intrmask read(w) val = 0x%04x\n", ret
);
160 static void ivshmem_IntrStatus_write(IVShmemState
*s
, uint32_t val
)
162 IVSHMEM_DPRINTF("IntrStatus write(w) val = 0x%04x\n", val
);
166 ivshmem_update_irq(s
, val
);
169 static uint32_t ivshmem_IntrStatus_read(IVShmemState
*s
)
171 uint32_t ret
= s
->intrstatus
;
173 /* reading ISR clears all interrupts */
176 ivshmem_update_irq(s
, 0);
181 static void ivshmem_io_write(void *opaque
, hwaddr addr
,
182 uint64_t val
, unsigned size
)
184 IVShmemState
*s
= opaque
;
186 uint16_t dest
= val
>> 16;
187 uint16_t vector
= val
& 0xff;
191 IVSHMEM_DPRINTF("writing to addr " TARGET_FMT_plx
"\n", addr
);
195 ivshmem_IntrMask_write(s
, val
);
199 ivshmem_IntrStatus_write(s
, val
);
203 /* check that dest VM ID is reasonable */
204 if (dest
> s
->max_peer
) {
205 IVSHMEM_DPRINTF("Invalid destination VM ID (%d)\n", dest
);
209 /* check doorbell range */
210 if (vector
< s
->peers
[dest
].nb_eventfds
) {
211 IVSHMEM_DPRINTF("Notifying VM %d on vector %d\n", dest
, vector
);
212 event_notifier_set(&s
->peers
[dest
].eventfds
[vector
]);
216 IVSHMEM_DPRINTF("Invalid VM Doorbell VM %d\n", dest
);
220 static uint64_t ivshmem_io_read(void *opaque
, hwaddr addr
,
224 IVShmemState
*s
= opaque
;
230 ret
= ivshmem_IntrMask_read(s
);
234 ret
= ivshmem_IntrStatus_read(s
);
238 /* return my VM ID if the memory is mapped */
247 IVSHMEM_DPRINTF("why are we reading " TARGET_FMT_plx
"\n", addr
);
254 static const MemoryRegionOps ivshmem_mmio_ops
= {
255 .read
= ivshmem_io_read
,
256 .write
= ivshmem_io_write
,
257 .endianness
= DEVICE_NATIVE_ENDIAN
,
259 .min_access_size
= 4,
260 .max_access_size
= 4,
264 static void ivshmem_receive(void *opaque
, const uint8_t *buf
, int size
)
266 IVShmemState
*s
= opaque
;
268 ivshmem_IntrStatus_write(s
, *buf
);
270 IVSHMEM_DPRINTF("ivshmem_receive 0x%02x\n", *buf
);
273 static int ivshmem_can_receive(void * opaque
)
278 static void ivshmem_event(void *opaque
, int event
)
280 IVSHMEM_DPRINTF("ivshmem_event %d\n", event
);
283 static void fake_irqfd(void *opaque
, const uint8_t *buf
, int size
) {
285 EventfdEntry
*entry
= opaque
;
286 PCIDevice
*pdev
= entry
->pdev
;
288 IVSHMEM_DPRINTF("interrupt on vector %p %d\n", pdev
, entry
->vector
);
289 msix_notify(pdev
, entry
->vector
);
292 static CharDriverState
* create_eventfd_chr_device(void * opaque
, EventNotifier
*n
,
295 /* create a event character device based on the passed eventfd */
296 IVShmemState
*s
= opaque
;
297 CharDriverState
* chr
;
298 int eventfd
= event_notifier_get_fd(n
);
300 chr
= qemu_chr_open_eventfd(eventfd
);
303 error_report("creating eventfd for eventfd %d failed", eventfd
);
306 qemu_chr_fe_claim_no_fail(chr
);
308 /* if MSI is supported we need multiple interrupts */
309 if (ivshmem_has_feature(s
, IVSHMEM_MSI
)) {
310 s
->eventfd_table
[vector
].pdev
= PCI_DEVICE(s
);
311 s
->eventfd_table
[vector
].vector
= vector
;
313 qemu_chr_add_handlers(chr
, ivshmem_can_receive
, fake_irqfd
,
314 ivshmem_event
, &s
->eventfd_table
[vector
]);
316 qemu_chr_add_handlers(chr
, ivshmem_can_receive
, ivshmem_receive
,
324 static int check_shm_size(IVShmemState
*s
, int fd
) {
325 /* check that the guest isn't going to try and map more memory than the
326 * the object has allocated return -1 to indicate error */
330 if (fstat(fd
, &buf
) < 0) {
331 error_report("exiting: fstat on fd %d failed: %s",
332 fd
, strerror(errno
));
336 if (s
->ivshmem_size
> buf
.st_size
) {
337 error_report("Requested memory size greater"
338 " than shared object size (%" PRIu64
" > %" PRIu64
")",
339 s
->ivshmem_size
, (uint64_t)buf
.st_size
);
346 /* create the shared memory BAR when we are not using the server, so we can
347 * create the BAR and map the memory immediately */
348 static void create_shared_memory_BAR(IVShmemState
*s
, int fd
) {
354 ptr
= mmap(0, s
->ivshmem_size
, PROT_READ
|PROT_WRITE
, MAP_SHARED
, fd
, 0);
356 memory_region_init_ram_ptr(&s
->ivshmem
, OBJECT(s
), "ivshmem.bar2",
357 s
->ivshmem_size
, ptr
);
358 vmstate_register_ram(&s
->ivshmem
, DEVICE(s
));
359 memory_region_add_subregion(&s
->bar
, 0, &s
->ivshmem
);
361 /* region for shared memory */
362 pci_register_bar(PCI_DEVICE(s
), 2, s
->ivshmem_attr
, &s
->bar
);
365 static void ivshmem_add_eventfd(IVShmemState
*s
, int posn
, int i
)
367 memory_region_add_eventfd(&s
->ivshmem_mmio
,
372 &s
->peers
[posn
].eventfds
[i
]);
375 static void ivshmem_del_eventfd(IVShmemState
*s
, int posn
, int i
)
377 memory_region_del_eventfd(&s
->ivshmem_mmio
,
382 &s
->peers
[posn
].eventfds
[i
]);
385 static void close_guest_eventfds(IVShmemState
*s
, int posn
)
387 int i
, guest_curr_max
;
389 if (!ivshmem_has_feature(s
, IVSHMEM_IOEVENTFD
)) {
392 if (posn
< 0 || posn
>= s
->nb_peers
) {
396 guest_curr_max
= s
->peers
[posn
].nb_eventfds
;
398 memory_region_transaction_begin();
399 for (i
= 0; i
< guest_curr_max
; i
++) {
400 ivshmem_del_eventfd(s
, posn
, i
);
402 memory_region_transaction_commit();
403 for (i
= 0; i
< guest_curr_max
; i
++) {
404 event_notifier_cleanup(&s
->peers
[posn
].eventfds
[i
]);
407 g_free(s
->peers
[posn
].eventfds
);
408 s
->peers
[posn
].nb_eventfds
= 0;
411 /* this function increase the dynamic storage need to store data about other
413 static int increase_dynamic_storage(IVShmemState
*s
, int new_min_size
)
418 /* check for integer overflow */
419 if (new_min_size
>= INT_MAX
/ sizeof(Peer
) - 1 || new_min_size
<= 0) {
423 old_nb_alloc
= s
->nb_peers
;
425 if (new_min_size
>= s
->nb_peers
) {
426 /* +1 because #new_min_size is used as last array index */
427 s
->nb_peers
= new_min_size
+ 1;
432 IVSHMEM_DPRINTF("bumping storage to %d guests\n", s
->nb_peers
);
433 s
->peers
= g_realloc(s
->peers
, s
->nb_peers
* sizeof(Peer
));
435 /* zero out new pointers */
436 for (j
= old_nb_alloc
; j
< s
->nb_peers
; j
++) {
437 s
->peers
[j
].eventfds
= NULL
;
438 s
->peers
[j
].nb_eventfds
= 0;
444 static void ivshmem_read(void *opaque
, const uint8_t *buf
, int size
)
446 IVShmemState
*s
= opaque
;
447 int incoming_fd
, tmp_fd
;
448 int guest_max_eventfd
;
451 if (fifo8_is_empty(&s
->incoming_fifo
) && size
== sizeof(incoming_posn
)) {
452 memcpy(&incoming_posn
, buf
, size
);
457 IVSHMEM_DPRINTF("short read of %d bytes\n", size
);
458 num
= MAX(size
, sizeof(long) - fifo8_num_used(&s
->incoming_fifo
));
459 fifo8_push_all(&s
->incoming_fifo
, buf
, num
);
460 if (fifo8_num_used(&s
->incoming_fifo
) < sizeof(incoming_posn
)) {
465 p
= fifo8_pop_buf(&s
->incoming_fifo
, sizeof(incoming_posn
), &num
);
466 g_assert(num
== sizeof(incoming_posn
));
467 memcpy(&incoming_posn
, p
, sizeof(incoming_posn
));
469 fifo8_push_all(&s
->incoming_fifo
, buf
, size
);
473 if (incoming_posn
< -1) {
474 IVSHMEM_DPRINTF("invalid incoming_posn %ld\n", incoming_posn
);
478 /* pick off s->server_chr->msgfd and store it, posn should accompany msg */
479 tmp_fd
= qemu_chr_fe_get_msgfd(s
->server_chr
);
480 IVSHMEM_DPRINTF("posn is %ld, fd is %d\n", incoming_posn
, tmp_fd
);
482 /* make sure we have enough space for this guest */
483 if (incoming_posn
>= s
->nb_peers
) {
484 if (increase_dynamic_storage(s
, incoming_posn
) < 0) {
485 error_report("increase_dynamic_storage() failed");
494 /* if posn is positive and unseen before then this is our posn*/
495 if ((incoming_posn
>= 0) &&
496 (s
->peers
[incoming_posn
].eventfds
== NULL
)) {
497 /* receive our posn */
498 s
->vm_id
= incoming_posn
;
501 /* otherwise an fd == -1 means an existing guest has gone away */
502 IVSHMEM_DPRINTF("posn %ld has gone away\n", incoming_posn
);
503 close_guest_eventfds(s
, incoming_posn
);
508 /* because of the implementation of get_msgfd, we need a dup */
509 incoming_fd
= dup(tmp_fd
);
511 if (incoming_fd
== -1) {
512 error_report("could not allocate file descriptor %s", strerror(errno
));
517 /* if the position is -1, then it's shared memory region fd */
518 if (incoming_posn
== -1) {
524 if (check_shm_size(s
, incoming_fd
) == -1) {
528 /* mmap the region and map into the BAR2 */
529 map_ptr
= mmap(0, s
->ivshmem_size
, PROT_READ
|PROT_WRITE
, MAP_SHARED
,
531 memory_region_init_ram_ptr(&s
->ivshmem
, OBJECT(s
),
532 "ivshmem.bar2", s
->ivshmem_size
, map_ptr
);
533 vmstate_register_ram(&s
->ivshmem
, DEVICE(s
));
535 IVSHMEM_DPRINTF("guest h/w addr = %p, size = %" PRIu64
"\n",
536 map_ptr
, s
->ivshmem_size
);
538 memory_region_add_subregion(&s
->bar
, 0, &s
->ivshmem
);
540 /* only store the fd if it is successfully mapped */
541 s
->shm_fd
= incoming_fd
;
546 /* each guest has an array of eventfds, and we keep track of how many
547 * guests for each VM */
548 guest_max_eventfd
= s
->peers
[incoming_posn
].nb_eventfds
;
550 if (guest_max_eventfd
== 0) {
551 /* one eventfd per MSI vector */
552 s
->peers
[incoming_posn
].eventfds
= g_new(EventNotifier
, s
->vectors
);
555 /* this is an eventfd for a particular guest VM */
556 IVSHMEM_DPRINTF("eventfds[%ld][%d] = %d\n", incoming_posn
,
557 guest_max_eventfd
, incoming_fd
);
558 event_notifier_init_fd(&s
->peers
[incoming_posn
].eventfds
[guest_max_eventfd
],
561 /* increment count for particular guest */
562 s
->peers
[incoming_posn
].nb_eventfds
++;
564 /* keep track of the maximum VM ID */
565 if (incoming_posn
> s
->max_peer
) {
566 s
->max_peer
= incoming_posn
;
569 if (incoming_posn
== s
->vm_id
) {
570 s
->eventfd_chr
[guest_max_eventfd
] = create_eventfd_chr_device(s
,
571 &s
->peers
[s
->vm_id
].eventfds
[guest_max_eventfd
],
575 if (ivshmem_has_feature(s
, IVSHMEM_IOEVENTFD
)) {
576 ivshmem_add_eventfd(s
, incoming_posn
, guest_max_eventfd
);
580 /* Select the MSI-X vectors used by device.
581 * ivshmem maps events to vectors statically, so
582 * we just enable all vectors on init and after reset. */
583 static void ivshmem_use_msix(IVShmemState
* s
)
585 PCIDevice
*d
= PCI_DEVICE(s
);
588 if (!msix_present(d
)) {
592 for (i
= 0; i
< s
->vectors
; i
++) {
593 msix_vector_use(d
, i
);
597 static void ivshmem_reset(DeviceState
*d
)
599 IVShmemState
*s
= IVSHMEM(d
);
605 static uint64_t ivshmem_get_size(IVShmemState
* s
) {
610 value
= strtoull(s
->sizearg
, &ptr
, 10);
612 case 0: case 'M': case 'm':
619 error_report("invalid ram size: %s", s
->sizearg
);
623 /* BARs must be a power of 2 */
624 if (!is_power_of_two(value
)) {
625 error_report("size must be power of 2");
632 static void ivshmem_setup_msi(IVShmemState
* s
)
634 if (msix_init_exclusive_bar(PCI_DEVICE(s
), s
->vectors
, 1)) {
635 IVSHMEM_DPRINTF("msix initialization failed\n");
639 IVSHMEM_DPRINTF("msix initialized (%d vectors)\n", s
->vectors
);
641 /* allocate QEMU char devices for receiving interrupts */
642 s
->eventfd_table
= g_malloc0(s
->vectors
* sizeof(EventfdEntry
));
647 static void ivshmem_save(QEMUFile
* f
, void *opaque
)
649 IVShmemState
*proxy
= opaque
;
650 PCIDevice
*pci_dev
= PCI_DEVICE(proxy
);
652 IVSHMEM_DPRINTF("ivshmem_save\n");
653 pci_device_save(pci_dev
, f
);
655 if (ivshmem_has_feature(proxy
, IVSHMEM_MSI
)) {
656 msix_save(pci_dev
, f
);
658 qemu_put_be32(f
, proxy
->intrstatus
);
659 qemu_put_be32(f
, proxy
->intrmask
);
664 static int ivshmem_load(QEMUFile
* f
, void *opaque
, int version_id
)
666 IVSHMEM_DPRINTF("ivshmem_load\n");
668 IVShmemState
*proxy
= opaque
;
669 PCIDevice
*pci_dev
= PCI_DEVICE(proxy
);
672 if (version_id
> 0) {
676 if (proxy
->role_val
== IVSHMEM_PEER
) {
677 error_report("'peer' devices are not migratable");
681 ret
= pci_device_load(pci_dev
, f
);
686 if (ivshmem_has_feature(proxy
, IVSHMEM_MSI
)) {
687 msix_load(pci_dev
, f
);
688 ivshmem_use_msix(proxy
);
690 proxy
->intrstatus
= qemu_get_be32(f
);
691 proxy
->intrmask
= qemu_get_be32(f
);
697 static void ivshmem_write_config(PCIDevice
*pci_dev
, uint32_t address
,
698 uint32_t val
, int len
)
700 pci_default_write_config(pci_dev
, address
, val
, len
);
703 static int pci_ivshmem_init(PCIDevice
*dev
)
705 IVShmemState
*s
= IVSHMEM(dev
);
708 if (s
->sizearg
== NULL
)
709 s
->ivshmem_size
= 4 << 20; /* 4 MB default */
711 s
->ivshmem_size
= ivshmem_get_size(s
);
714 fifo8_create(&s
->incoming_fifo
, sizeof(long));
716 register_savevm(DEVICE(dev
), "ivshmem", 0, 0, ivshmem_save
, ivshmem_load
,
719 /* IRQFD requires MSI */
720 if (ivshmem_has_feature(s
, IVSHMEM_IOEVENTFD
) &&
721 !ivshmem_has_feature(s
, IVSHMEM_MSI
)) {
722 error_report("ioeventfd/irqfd requires MSI");
726 /* check that role is reasonable */
728 if (strncmp(s
->role
, "peer", 5) == 0) {
729 s
->role_val
= IVSHMEM_PEER
;
730 } else if (strncmp(s
->role
, "master", 7) == 0) {
731 s
->role_val
= IVSHMEM_MASTER
;
733 error_report("'role' must be 'peer' or 'master'");
737 s
->role_val
= IVSHMEM_MASTER
; /* default */
740 if (s
->role_val
== IVSHMEM_PEER
) {
741 error_setg(&s
->migration_blocker
,
742 "Migration is disabled when using feature 'peer mode' in device 'ivshmem'");
743 migrate_add_blocker(s
->migration_blocker
);
746 pci_conf
= dev
->config
;
747 pci_conf
[PCI_COMMAND
] = PCI_COMMAND_IO
| PCI_COMMAND_MEMORY
;
749 pci_config_set_interrupt_pin(pci_conf
, 1);
753 memory_region_init_io(&s
->ivshmem_mmio
, OBJECT(s
), &ivshmem_mmio_ops
, s
,
754 "ivshmem-mmio", IVSHMEM_REG_BAR_SIZE
);
756 /* region for registers*/
757 pci_register_bar(dev
, 0, PCI_BASE_ADDRESS_SPACE_MEMORY
,
760 memory_region_init(&s
->bar
, OBJECT(s
), "ivshmem-bar2-container", s
->ivshmem_size
);
761 s
->ivshmem_attr
= PCI_BASE_ADDRESS_SPACE_MEMORY
|
762 PCI_BASE_ADDRESS_MEM_PREFETCH
;
763 if (s
->ivshmem_64bit
) {
764 s
->ivshmem_attr
|= PCI_BASE_ADDRESS_MEM_TYPE_64
;
767 if ((s
->server_chr
!= NULL
) &&
768 (strncmp(s
->server_chr
->filename
, "unix:", 5) == 0)) {
769 /* if we get a UNIX socket as the parameter we will talk
770 * to the ivshmem server to receive the memory region */
772 if (s
->shmobj
!= NULL
) {
773 error_report("WARNING: do not specify both 'chardev' "
774 "and 'shm' with ivshmem");
777 IVSHMEM_DPRINTF("using shared memory server (socket = %s)\n",
778 s
->server_chr
->filename
);
780 if (ivshmem_has_feature(s
, IVSHMEM_MSI
)) {
781 ivshmem_setup_msi(s
);
784 /* we allocate enough space for 16 guests and grow as needed */
788 /* allocate/initialize space for interrupt handling */
789 s
->peers
= g_malloc0(s
->nb_peers
* sizeof(Peer
));
791 pci_register_bar(dev
, 2, s
->ivshmem_attr
, &s
->bar
);
793 s
->eventfd_chr
= g_malloc0(s
->vectors
* sizeof(CharDriverState
*));
795 qemu_chr_add_handlers(s
->server_chr
, ivshmem_can_receive
, ivshmem_read
,
798 /* just map the file immediately, we're not using a server */
801 if (s
->shmobj
== NULL
) {
802 error_report("Must specify 'chardev' or 'shm' to ivshmem");
806 IVSHMEM_DPRINTF("using shm_open (shm object = %s)\n", s
->shmobj
);
808 /* try opening with O_EXCL and if it succeeds zero the memory
809 * by truncating to 0 */
810 if ((fd
= shm_open(s
->shmobj
, O_CREAT
|O_RDWR
|O_EXCL
,
811 S_IRWXU
|S_IRWXG
|S_IRWXO
)) > 0) {
812 /* truncate file to length PCI device's memory */
813 if (ftruncate(fd
, s
->ivshmem_size
) != 0) {
814 error_report("could not truncate shared file");
817 } else if ((fd
= shm_open(s
->shmobj
, O_CREAT
|O_RDWR
,
818 S_IRWXU
|S_IRWXG
|S_IRWXO
)) < 0) {
819 error_report("could not open shared file");
824 if (check_shm_size(s
, fd
) == -1) {
828 create_shared_memory_BAR(s
, fd
);
832 dev
->config_write
= ivshmem_write_config
;
837 static void pci_ivshmem_uninit(PCIDevice
*dev
)
839 IVShmemState
*s
= IVSHMEM(dev
);
841 if (s
->migration_blocker
) {
842 migrate_del_blocker(s
->migration_blocker
);
843 error_free(s
->migration_blocker
);
846 memory_region_del_subregion(&s
->bar
, &s
->ivshmem
);
847 vmstate_unregister_ram(&s
->ivshmem
, DEVICE(dev
));
848 unregister_savevm(DEVICE(dev
), "ivshmem", s
);
849 fifo8_destroy(&s
->incoming_fifo
);
852 static Property ivshmem_properties
[] = {
853 DEFINE_PROP_CHR("chardev", IVShmemState
, server_chr
),
854 DEFINE_PROP_STRING("size", IVShmemState
, sizearg
),
855 DEFINE_PROP_UINT32("vectors", IVShmemState
, vectors
, 1),
856 DEFINE_PROP_BIT("ioeventfd", IVShmemState
, features
, IVSHMEM_IOEVENTFD
, false),
857 DEFINE_PROP_BIT("msi", IVShmemState
, features
, IVSHMEM_MSI
, true),
858 DEFINE_PROP_STRING("shm", IVShmemState
, shmobj
),
859 DEFINE_PROP_STRING("role", IVShmemState
, role
),
860 DEFINE_PROP_UINT32("use64", IVShmemState
, ivshmem_64bit
, 1),
861 DEFINE_PROP_END_OF_LIST(),
864 static void ivshmem_class_init(ObjectClass
*klass
, void *data
)
866 DeviceClass
*dc
= DEVICE_CLASS(klass
);
867 PCIDeviceClass
*k
= PCI_DEVICE_CLASS(klass
);
869 k
->init
= pci_ivshmem_init
;
870 k
->exit
= pci_ivshmem_uninit
;
871 k
->vendor_id
= PCI_VENDOR_ID_IVSHMEM
;
872 k
->device_id
= PCI_DEVICE_ID_IVSHMEM
;
873 k
->class_id
= PCI_CLASS_MEMORY_RAM
;
874 dc
->reset
= ivshmem_reset
;
875 dc
->props
= ivshmem_properties
;
876 set_bit(DEVICE_CATEGORY_MISC
, dc
->categories
);
879 static const TypeInfo ivshmem_info
= {
880 .name
= TYPE_IVSHMEM
,
881 .parent
= TYPE_PCI_DEVICE
,
882 .instance_size
= sizeof(IVShmemState
),
883 .class_init
= ivshmem_class_init
,
886 static void ivshmem_register_types(void)
888 type_register_static(&ivshmem_info
);
891 type_init(ivshmem_register_types
)