static int pci_ivshmem_init(PCIDevice *dev)
{
IVShmemState *s = DO_UPCAST(IVShmemState, dev, dev);
uint8_t *pci_conf;
if (s->sizearg == NULL)
s->ivshmem_size = 4 << 20; /* 4 MB default */
else {
s->ivshmem_size = ivshmem_get_size(s);
}
register_savevm(&s->dev.qdev, "ivshmem", 0, 0, ivshmem_save, ivshmem_load,
dev);
/* IRQFD requires MSI */
if (ivshmem_has_feature(s, IVSHMEM_IOEVENTFD) &&
!ivshmem_has_feature(s, IVSHMEM_MSI)) {
fprintf(stderr, "ivshmem: ioeventfd/irqfd requires MSI\n");
exit(1);
}
/* check that role is reasonable */
if (s->role) {
if (strncmp(s->role, "peer", 5) == 0) {
s->role_val = IVSHMEM_PEER;
} else if (strncmp(s->role, "master", 7) == 0) {
s->role_val = IVSHMEM_MASTER;
} else {
fprintf(stderr, "ivshmem: 'role' must be 'peer' or 'master'\n");
exit(1);
}
} else {
s->role_val = IVSHMEM_MASTER; /* default */
}
if (s->role_val == IVSHMEM_PEER) {
error_set(&s->migration_blocker, QERR_DEVICE_FEATURE_BLOCKS_MIGRATION,
"peer mode", "ivshmem");
migrate_add_blocker(s->migration_blocker);
}
pci_conf = s->dev.config;
pci_conf[PCI_COMMAND] = PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
pci_config_set_interrupt_pin(pci_conf, 1);
s->shm_fd = 0;
memory_region_init_io(&s->ivshmem_mmio, &ivshmem_mmio_ops, s,
"ivshmem-mmio", IVSHMEM_REG_BAR_SIZE);
/* region for registers*/
pci_register_bar(&s->dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY,
&s->ivshmem_mmio);
memory_region_init(&s->bar, "ivshmem-bar2-container", s->ivshmem_size);
s->ivshmem_attr = PCI_BASE_ADDRESS_SPACE_MEMORY |
PCI_BASE_ADDRESS_MEM_PREFETCH;
if (s->ivshmem_64bit) {
s->ivshmem_attr |= PCI_BASE_ADDRESS_MEM_TYPE_64;
}
if ((s->server_chr != NULL) &&
(strncmp(s->server_chr->filename, "unix:", 5) == 0)) {
/* if we get a UNIX socket as the parameter we will talk
* to the ivshmem server to receive the memory region */
if (s->shmobj != NULL) {
fprintf(stderr, "WARNING: do not specify both 'chardev' "
"and 'shm' with ivshmem\n");
}
IVSHMEM_DPRINTF("using shared memory server (socket = %s)\n",
s->server_chr->filename);
if (ivshmem_has_feature(s, IVSHMEM_MSI)) {
ivshmem_setup_msi(s);
}
/* we allocate enough space for 16 guests and grow as needed */
s->nb_peers = 16;
s->vm_id = -1;
/* allocate/initialize space for interrupt handling */
s->peers = g_malloc0(s->nb_peers * sizeof(Peer));
pci_register_bar(&s->dev, 2, s->ivshmem_attr, &s->bar);
s->eventfd_chr = g_malloc0(s->vectors * sizeof(CharDriverState *));
qemu_chr_add_handlers(s->server_chr, ivshmem_can_receive, ivshmem_read,
ivshmem_event, s);
} else {
/* just map the file immediately, we're not using a server */
int fd;
if (s->shmobj == NULL) {
fprintf(stderr, "Must specify 'chardev' or 'shm' to ivshmem\n");
}
IVSHMEM_DPRINTF("using shm_open (shm object = %s)\n", s->shmobj);
/* try opening with O_EXCL and if it succeeds zero the memory
* by truncating to 0 */
if ((fd = shm_open(s->shmobj, O_CREAT|O_RDWR|O_EXCL,
S_IRWXU|S_IRWXG|S_IRWXO)) > 0) {
/* truncate file to length PCI device's memory */
if (ftruncate(fd, s->ivshmem_size) != 0) {
fprintf(stderr, "ivshmem: could not truncate shared file\n");
}
} else if ((fd = shm_open(s->shmobj, O_CREAT|O_RDWR,
S_IRWXU|S_IRWXG|S_IRWXO)) < 0) {
fprintf(stderr, "ivshmem: could not open shared file\n");
exit(-1);
}
if (check_shm_size(s, fd) == -1) {
exit(-1);
}
create_shared_memory_BAR(s, fd);
}
s->dev.config_write = ivshmem_write_config;
return 0;
}
static void pci_ivshmem_realize(PCIDevice *dev, Error **errp)
{
IVShmemState *s = IVSHMEM(dev);
uint8_t *pci_conf;
uint8_t attr = PCI_BASE_ADDRESS_SPACE_MEMORY |
PCI_BASE_ADDRESS_MEM_PREFETCH;
if (!!s->server_chr + !!s->shmobj + !!s->hostmem != 1) {
error_setg(errp,
"You must specify either 'shm', 'chardev' or 'x-memdev'");
return;
}
if (s->hostmem) {
MemoryRegion *mr;
if (s->sizearg) {
g_warning("size argument ignored with hostmem");
}
mr = host_memory_backend_get_memory(s->hostmem, errp);
s->ivshmem_size = memory_region_size(mr);
} else if (s->sizearg == NULL) {
s->ivshmem_size = 4 << 20; /* 4 MB default */
} else {
char *end;
int64_t size = qemu_strtosz(s->sizearg, &end);
if (size < 0 || *end != '\0' || !is_power_of_2(size)) {
error_setg(errp, "Invalid size %s", s->sizearg);
return;
}
s->ivshmem_size = size;
}
fifo8_create(&s->incoming_fifo, sizeof(int64_t));
/* IRQFD requires MSI */
if (ivshmem_has_feature(s, IVSHMEM_IOEVENTFD) &&
!ivshmem_has_feature(s, IVSHMEM_MSI)) {
error_setg(errp, "ioeventfd/irqfd requires MSI");
return;
}
/* check that role is reasonable */
if (s->role) {
if (strncmp(s->role, "peer", 5) == 0) {
s->role_val = IVSHMEM_PEER;
} else if (strncmp(s->role, "master", 7) == 0) {
s->role_val = IVSHMEM_MASTER;
} else {
error_setg(errp, "'role' must be 'peer' or 'master'");
return;
}
} else {
s->role_val = IVSHMEM_MASTER; /* default */
}
if (s->role_val == IVSHMEM_PEER) {
error_setg(&s->migration_blocker,
"Migration is disabled when using feature 'peer mode' in device 'ivshmem'");
migrate_add_blocker(s->migration_blocker);
}
pci_conf = dev->config;
pci_conf[PCI_COMMAND] = PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
pci_config_set_interrupt_pin(pci_conf, 1);
memory_region_init_io(&s->ivshmem_mmio, OBJECT(s), &ivshmem_mmio_ops, s,
"ivshmem-mmio", IVSHMEM_REG_BAR_SIZE);
/* region for registers*/
pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY,
&s->ivshmem_mmio);
memory_region_init(&s->bar, OBJECT(s), "ivshmem-bar2-container", s->ivshmem_size);
if (s->ivshmem_64bit) {
attr |= PCI_BASE_ADDRESS_MEM_TYPE_64;
}
if (s->hostmem != NULL) {
MemoryRegion *mr;
IVSHMEM_DPRINTF("using hostmem\n");
mr = host_memory_backend_get_memory(MEMORY_BACKEND(s->hostmem), errp);
vmstate_register_ram(mr, DEVICE(s));
memory_region_add_subregion(&s->bar, 0, mr);
pci_register_bar(PCI_DEVICE(s), 2, attr, &s->bar);
} else if (s->server_chr != NULL) {
/* FIXME do not rely on what chr drivers put into filename */
if (strncmp(s->server_chr->filename, "unix:", 5)) {
error_setg(errp, "chardev is not a unix client socket");
return;
}
/* if we get a UNIX socket as the parameter we will talk
* to the ivshmem server to receive the memory region */
IVSHMEM_DPRINTF("using shared memory server (socket = %s)\n",
s->server_chr->filename);
if (ivshmem_has_feature(s, IVSHMEM_MSI) &&
ivshmem_setup_msi(s)) {
error_setg(errp, "msix initialization failed");
return;
}
/* we allocate enough space for 16 peers and grow as needed */
resize_peers(s, 16);
s->vm_id = -1;
pci_register_bar(dev, 2, attr, &s->bar);
s->eventfd_chr = g_malloc0(s->vectors * sizeof(CharDriverState *));
qemu_chr_add_handlers(s->server_chr, ivshmem_can_receive,
ivshmem_check_version, ivshmem_event, s);
} else {
/* just map the file immediately, we're not using a server */
int fd;
IVSHMEM_DPRINTF("using shm_open (shm object = %s)\n", s->shmobj);
/* try opening with O_EXCL and if it succeeds zero the memory
* by truncating to 0 */
if ((fd = shm_open(s->shmobj, O_CREAT|O_RDWR|O_EXCL,
S_IRWXU|S_IRWXG|S_IRWXO)) > 0) {
/* truncate file to length PCI device's memory */
if (ftruncate(fd, s->ivshmem_size) != 0) {
error_report("could not truncate shared file");
}
} else if ((fd = shm_open(s->shmobj, O_CREAT|O_RDWR,
S_IRWXU|S_IRWXG|S_IRWXO)) < 0) {
error_setg(errp, "could not open shared file");
return;
}
if (check_shm_size(s, fd, errp) == -1) {
return;
}
create_shared_memory_BAR(s, fd, attr, errp);
}
}
static int pci_ivshmem_init(PCIDevice *dev)
{
IVShmemState *s = DO_UPCAST(IVShmemState, dev, dev);
uint8_t *pci_conf;
if (s->sizearg == NULL)
s->ivshmem_size = 4 << 20; /* 4 MB default */
else {
s->ivshmem_size = ivshmem_get_size(s);
}
register_savevm(&s->dev.qdev, "ivshmem", 0, 0, ivshmem_save, ivshmem_load,
dev);
/* IRQFD requires MSI */
if (ivshmem_has_feature(s, IVSHMEM_IOEVENTFD) &&
!ivshmem_has_feature(s, IVSHMEM_MSI)) {
fprintf(stderr, "ivshmem: ioeventfd/irqfd requires MSI\n");
exit(1);
}
/* check that role is reasonable */
if (s->role) {
if (strncmp(s->role, "peer", 5) == 0) {
s->role_val = IVSHMEM_PEER;
} else if (strncmp(s->role, "master", 7) == 0) {
s->role_val = IVSHMEM_MASTER;
} else {
fprintf(stderr, "ivshmem: 'role' must be 'peer' or 'master'\n");
exit(1);
}
} else {
s->role_val = IVSHMEM_MASTER; /* default */
}
if (s->role_val == IVSHMEM_PEER) {
error_set(&s->migration_blocker, QERR_DEVICE_FEATURE_BLOCKS_MIGRATION,
"peer mode", "ivshmem");
migrate_add_blocker(s->migration_blocker);
}
pci_conf = s->dev.config;
pci_conf[PCI_COMMAND] = PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
pci_config_set_interrupt_pin(pci_conf, 1);
memset(s->shm_fds, 0, sizeof(s->shm_fds));
memory_region_init_io(&s->ivshmem_mmio, &ivshmem_mmio_ops, s,
"ivshmem-mmio", IVSHMEM_REG_BAR_SIZE);
/* region for registers*/
pci_register_bar(&s->dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY,
&s->ivshmem_mmio);
memory_region_init(&s->bar, "ivshmem-bar2-container", s->ivshmem_size);
s->ivshmem_attr = PCI_BASE_ADDRESS_SPACE_MEMORY |
PCI_BASE_ADDRESS_MEM_PREFETCH;
if (s->ivshmem_64bit) {
s->ivshmem_attr |= PCI_BASE_ADDRESS_MEM_TYPE_64;
}
if ((s->server_chr != NULL) &&
(strncmp(s->server_chr->filename, "unix:", 5) == 0)) {
/* if we get a UNIX socket as the parameter we will talk
* to the ivshmem server to receive the memory region */
if (s->shmobj != NULL) {
fprintf(stderr, "WARNING: do not specify both 'chardev' "
"and 'shm' with ivshmem\n");
}
IVSHMEM_DPRINTF("using shared memory server (socket = %s)\n",
s->server_chr->filename);
if (ivshmem_has_feature(s, IVSHMEM_MSI)) {
ivshmem_setup_msi(s);
}
/* we allocate enough space for 16 guests and grow as needed */
s->nb_peers = 16;
s->vm_id = -1;
/* allocate/initialize space for interrupt handling */
s->peers = g_malloc0(s->nb_peers * sizeof(Peer));
pci_register_bar(&s->dev, 2, s->ivshmem_attr, &s->bar);
s->eventfd_chr = g_malloc0(s->vectors * sizeof(CharDriverState *));
qemu_chr_add_handlers(s->server_chr, ivshmem_can_receive, ivshmem_read,
ivshmem_event, s);
} else {
/* just map the file immediately, we're not using a server */
IVShmemFile f[IVSHMEM_MAX_FILES];
int f_index = 0;
if (s->shmobj == NULL) {
fprintf(stderr, "Must specify 'chardev' or 'shm' to ivshmem\n");
exit(1);
}
IVSHMEM_DPRINTF("using shm_open (shm object = %s)\n", s->shmobj);
memset(f, 0, sizeof(f));
/* check if we are trying to share a regular file */
if (strncmp(s->shmobj, FD_PREFIX, sizeof(FD_PREFIX) - 1) == 0) {
int token_n, n_cols, i;
char * tok;
n_cols = 0;
token_n = -1;
/* find out how many colons do we have */
for (i = 0; i <= strlen(s->shmobj); i++) {
if (s->shmobj[i] == ':')
n_cols++;
}
tok = strtok(s->shmobj, ":");
while (tok != NULL) {
if (f_index == IVSHMEM_MAX_FILES) {
fprintf(stderr, "ivshmem: too many files (maximum is %i)\n",
IVSHMEM_MAX_FILES);
exit(-1);
}
/* skip the first token */
if (token_n == -1) {
tok = strtok(0, ":");
token_n++;
continue;
}
switch (token_n % TOK_NUM) {
case TOK_FILENAME:
if ((f[f_index].fd = open(tok, O_RDWR | O_SYNC)) < 0) {
fprintf(stderr, "ivshmem: error opening file %s: %s\n",
tok, strerror(errno));
exit(-1);
}
/* get true file size, may be changed later */
f[f_index].size = get_file_size(f[f_index].fd);
break;
case TOK_OFFSET:
f[f_index].offset = strtoull(tok, NULL, 16);
break;
case TOK_SIZE:
f[f_index].size = strtoull(tok, NULL, 16);
f_index++;
break;
default:
fprintf(stderr, "ivshmem: invalid parameters\n");
exit(-1);
}
tok = strtok(0, ":");
token_n++;
}
/* check every file descriptor */
for (i = 0; i < IVSHMEM_MAX_FILES; i++) {
if (f[i].fd > 0) {
if (check_shm_size(f[i].fd, f[i].size, f[i].offset) == -1)
exit(-1);
}
}
/* check if we haven't skipped any tokens */
if ((token_n != n_cols) || (n_cols > (IVSHMEM_MAX_FILES * 3))) {
fprintf(stderr, "ivshmem: invalid parameters\n");
exit(-1);
}
}
else {
/* try opening with O_EXCL and if it succeeds zero the memory
* by truncating to 0 */
if ((f[0].fd = shm_open(s->shmobj, O_CREAT|O_RDWR|O_EXCL,
S_IRWXU|S_IRWXG|S_IRWXO)) > 0) {
/* truncate file to length PCI device's memory */
if (ftruncate(f[0].fd, s->ivshmem_size) != 0) {
fprintf(stderr, "ivshmem: could not truncate shared file\n");
}
} else if ((f[0].fd = shm_open(s->shmobj, O_CREAT|O_RDWR,
S_IRWXU|S_IRWXG|S_IRWXO)) < 0) {
fprintf(stderr, "ivshmem: could not open shared file\n");
exit(-1);
}
if (s->ivshmem_size > get_file_size(f[0].fd)) {
fprintf(stderr, "ivshmem: Requested memory size greater"
" than shared object size\n");
exit(-1);
}
f_index = 1;
}
if (check_total_shm_size(s, f, f_index))
exit(-1);
if (create_shared_memory_BAR(s, f, f_index) < 0)
exit(-1);
}
s->dev.config_write = ivshmem_write_config;
return 0;
}
static int pci_ivshmem_init(PCIDevice *dev)
{
IVShmemState *s = DO_UPCAST(IVShmemState, dev, dev);
uint8_t *pci_conf;
if (s->sizearg == NULL)
s->ivshmem_size = 4 << 20; /* 4 MB default */
else {
s->ivshmem_size = ivshmem_get_size(s);
}
register_savevm(&s->dev.qdev, "ivshmem", 0, 0, ivshmem_save, ivshmem_load,
dev);
/* IRQFD requires MSI */
if (ivshmem_has_feature(s, IVSHMEM_IOEVENTFD) &&
!ivshmem_has_feature(s, IVSHMEM_MSI)) {
fprintf(stderr, "ivshmem: ioeventfd/irqfd requires MSI\n");
exit(1);
}
/* check that role is reasonable */
if (s->role) {
if (strncmp(s->role, "peer", 5) == 0) {
s->role_val = IVSHMEM_PEER;
} else if (strncmp(s->role, "master", 7) == 0) {
s->role_val = IVSHMEM_MASTER;
} else {
fprintf(stderr, "ivshmem: 'role' must be 'peer' or 'master'\n");
exit(1);
}
} else {
s->role_val = IVSHMEM_MASTER; /* default */
}
if (s->role_val == IVSHMEM_PEER) {
register_device_unmigratable(&s->dev.qdev, "ivshmem", s);
}
pci_conf = s->dev.config;
pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_REDHAT_QUMRANET);
pci_conf[0x02] = 0x10;
pci_conf[0x03] = 0x11;
pci_conf[PCI_COMMAND] = PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
pci_config_set_class(pci_conf, PCI_CLASS_MEMORY_RAM);
pci_conf[PCI_HEADER_TYPE] = PCI_HEADER_TYPE_NORMAL;
pci_config_set_interrupt_pin(pci_conf, 1);
s->shm_pci_addr = 0;
s->ivshmem_offset = 0;
s->shm_fd = 0;
s->ivshmem_mmio_io_addr = cpu_register_io_memory(ivshmem_mmio_read,
ivshmem_mmio_write, s);
/* region for registers*/
pci_register_bar(&s->dev, 0, IVSHMEM_REG_BAR_SIZE,
PCI_BASE_ADDRESS_SPACE_MEMORY, ivshmem_mmio_map);
if ((s->server_chr != NULL) &&
(strncmp(s->server_chr->filename, "unix:", 5) == 0)) {
/* if we get a UNIX socket as the parameter we will talk
* to the ivshmem server to receive the memory region */
if (s->shmobj != NULL) {
fprintf(stderr, "WARNING: do not specify both 'chardev' "
"and 'shm' with ivshmem\n");
}
IVSHMEM_DPRINTF("using shared memory server (socket = %s)\n",
s->server_chr->filename);
if (ivshmem_has_feature(s, IVSHMEM_MSI)) {
ivshmem_setup_msi(s);
}
/* we allocate enough space for 16 guests and grow as needed */
s->nb_peers = 16;
s->vm_id = -1;
/* allocate/initialize space for interrupt handling */
s->peers = qemu_mallocz(s->nb_peers * sizeof(Peer));
pci_register_bar(&s->dev, 2, s->ivshmem_size,
PCI_BASE_ADDRESS_SPACE_MEMORY, ivshmem_map);
s->eventfd_chr = qemu_mallocz(s->vectors * sizeof(CharDriverState *));
qemu_chr_add_handlers(s->server_chr, ivshmem_can_receive, ivshmem_read,
ivshmem_event, s);
} else {
/* just map the file immediately, we're not using a server */
int fd;
if (s->shmobj == NULL) {
fprintf(stderr, "Must specify 'chardev' or 'shm' to ivshmem\n");
}
IVSHMEM_DPRINTF("using shm_open (shm object = %s)\n", s->shmobj);
/* try opening with O_EXCL and if it succeeds zero the memory
* by truncating to 0 */
if ((fd = shm_open(s->shmobj, O_CREAT|O_RDWR|O_EXCL,
S_IRWXU|S_IRWXG|S_IRWXO)) > 0) {
/* truncate file to length PCI device's memory */
if (ftruncate(fd, s->ivshmem_size) != 0) {
fprintf(stderr, "ivshmem: could not truncate shared file\n");
}
} else if ((fd = shm_open(s->shmobj, O_CREAT|O_RDWR,
S_IRWXU|S_IRWXG|S_IRWXO)) < 0) {
fprintf(stderr, "ivshmem: could not open shared file\n");
exit(-1);
}
if (check_shm_size(s, fd) == -1) {
exit(-1);
}
create_shared_memory_BAR(s, fd);
}
return 0;
}
