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-rw-r--r--hw/misc/ivshmem.c119
1 files changed, 68 insertions, 51 deletions
diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c
index dea4096..62547c0 100644
--- a/hw/misc/ivshmem.c
+++ b/hw/misc/ivshmem.c
@@ -319,22 +319,23 @@ static CharDriverState* create_eventfd_chr_device(void * opaque, EventNotifier *
}
-static int check_shm_size(IVShmemState *s, int fd) {
+static int check_shm_size(IVShmemState *s, int fd, Error **errp)
+{
/* check that the guest isn't going to try and map more memory than the
* the object has allocated return -1 to indicate error */
struct stat buf;
if (fstat(fd, &buf) < 0) {
- error_report("exiting: fstat on fd %d failed: %s",
- fd, strerror(errno));
+ error_setg(errp, "exiting: fstat on fd %d failed: %s",
+ fd, strerror(errno));
return -1;
}
if (s->ivshmem_size > buf.st_size) {
- error_report("Requested memory size greater"
- " than shared object size (%" PRIu64 " > %" PRIu64")",
- s->ivshmem_size, (uint64_t)buf.st_size);
+ error_setg(errp, "Requested memory size greater"
+ " than shared object size (%" PRIu64 " > %" PRIu64")",
+ s->ivshmem_size, (uint64_t)buf.st_size);
return -1;
} else {
return 0;
@@ -343,13 +344,18 @@ static int check_shm_size(IVShmemState *s, int fd) {
/* create the shared memory BAR when we are not using the server, so we can
* create the BAR and map the memory immediately */
-static void create_shared_memory_BAR(IVShmemState *s, int fd, uint8_t attr) {
-
+static int create_shared_memory_BAR(IVShmemState *s, int fd, uint8_t attr,
+ Error **errp)
+{
void * ptr;
- s->shm_fd = fd;
-
ptr = mmap(0, s->ivshmem_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
+ if (ptr == MAP_FAILED) {
+ error_setg_errno(errp, errno, "Failed to mmap shared memory");
+ return -1;
+ }
+
+ s->shm_fd = fd;
memory_region_init_ram_ptr(&s->ivshmem, OBJECT(s), "ivshmem.bar2",
s->ivshmem_size, ptr);
@@ -358,6 +364,8 @@ static void create_shared_memory_BAR(IVShmemState *s, int fd, uint8_t attr) {
/* region for shared memory */
pci_register_bar(PCI_DEVICE(s), 2, attr, &s->bar);
+
+ return 0;
}
static void ivshmem_add_eventfd(IVShmemState *s, int posn, int i)
@@ -481,6 +489,7 @@ static void ivshmem_read(void *opaque, const uint8_t *buf, int size)
int incoming_fd;
int guest_max_eventfd;
long incoming_posn;
+ Error *err = NULL;
if (!fifo_update_and_get(s, buf, size,
&incoming_posn, sizeof(incoming_posn))) {
@@ -524,18 +533,24 @@ static void ivshmem_read(void *opaque, const uint8_t *buf, int size)
/* if the position is -1, then it's shared memory region fd */
if (incoming_posn == -1) {
-
void * map_ptr;
s->max_peer = 0;
- if (check_shm_size(s, incoming_fd) == -1) {
- exit(1);
+ if (check_shm_size(s, incoming_fd, &err) == -1) {
+ error_report_err(err);
+ close(incoming_fd);
+ return;
}
/* mmap the region and map into the BAR2 */
map_ptr = mmap(0, s->ivshmem_size, PROT_READ|PROT_WRITE, MAP_SHARED,
incoming_fd, 0);
+ if (map_ptr == MAP_FAILED) {
+ error_report("Failed to mmap shared memory %s", strerror(errno));
+ close(incoming_fd);
+ return;
+ }
memory_region_init_ram_ptr(&s->ivshmem, OBJECT(s),
"ivshmem.bar2", s->ivshmem_size, map_ptr);
vmstate_register_ram(&s->ivshmem, DEVICE(s));
@@ -610,7 +625,7 @@ static void ivshmem_reset(DeviceState *d)
ivshmem_use_msix(s);
}
-static uint64_t ivshmem_get_size(IVShmemState * s) {
+static uint64_t ivshmem_get_size(IVShmemState * s, Error **errp) {
uint64_t value;
char *ptr;
@@ -624,24 +639,23 @@ static uint64_t ivshmem_get_size(IVShmemState * s) {
value <<= 30;
break;
default:
- error_report("invalid ram size: %s", s->sizearg);
- exit(1);
+ error_setg(errp, "invalid ram size: %s", s->sizearg);
+ return 0;
}
/* BARs must be a power of 2 */
if (!is_power_of_two(value)) {
- error_report("size must be power of 2");
- exit(1);
+ error_setg(errp, "size must be power of 2");
+ return 0;
}
return value;
}
-static void ivshmem_setup_msi(IVShmemState * s)
+static int ivshmem_setup_msi(IVShmemState * s)
{
if (msix_init_exclusive_bar(PCI_DEVICE(s), s->vectors, 1)) {
- IVSHMEM_DPRINTF("msix initialization failed\n");
- exit(1);
+ return -1;
}
IVSHMEM_DPRINTF("msix initialized (%d vectors)\n", s->vectors);
@@ -650,6 +664,7 @@ static void ivshmem_setup_msi(IVShmemState * s)
s->eventfd_table = g_malloc0(s->vectors * sizeof(EventfdEntry));
ivshmem_use_msix(s);
+ return 0;
}
static void ivshmem_save(QEMUFile* f, void *opaque)
@@ -703,34 +718,37 @@ static int ivshmem_load(QEMUFile* f, void *opaque, int version_id)
}
static void ivshmem_write_config(PCIDevice *pci_dev, uint32_t address,
- uint32_t val, int len)
+ uint32_t val, int len)
{
pci_default_write_config(pci_dev, address, val, len);
}
-static int pci_ivshmem_init(PCIDevice *dev)
+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;
+ Error *local_err = NULL;
- if (s->sizearg == NULL)
+ if (s->sizearg == NULL) {
s->ivshmem_size = 4 << 20; /* 4 MB default */
- else {
- s->ivshmem_size = ivshmem_get_size(s);
+ } else {
+ s->ivshmem_size = ivshmem_get_size(s, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
}
fifo8_create(&s->incoming_fifo, sizeof(long));
-
register_savevm(DEVICE(dev), "ivshmem", 0, 0, ivshmem_save, ivshmem_load,
dev);
-
/* IRQFD requires MSI */
if (ivshmem_has_feature(s, IVSHMEM_IOEVENTFD) &&
!ivshmem_has_feature(s, IVSHMEM_MSI)) {
- error_report("ioeventfd/irqfd requires MSI");
- exit(1);
+ error_setg(errp, "ioeventfd/irqfd requires MSI");
+ return;
}
/* check that role is reasonable */
@@ -740,8 +758,8 @@ static int pci_ivshmem_init(PCIDevice *dev)
} else if (strncmp(s->role, "master", 7) == 0) {
s->role_val = IVSHMEM_MASTER;
} else {
- error_report("'role' must be 'peer' or 'master'");
- exit(1);
+ error_setg(errp, "'role' must be 'peer' or 'master'");
+ return;
}
} else {
s->role_val = IVSHMEM_MASTER; /* default */
@@ -778,15 +796,18 @@ static int pci_ivshmem_init(PCIDevice *dev)
* to the ivshmem server to receive the memory region */
if (s->shmobj != NULL) {
- error_report("WARNING: do not specify both 'chardev' "
- "and 'shm' with ivshmem");
+ error_setg(errp, "do not specify both 'chardev' "
+ "and 'shm' with ivshmem");
+ return;
}
IVSHMEM_DPRINTF("using shared memory server (socket = %s)\n",
s->server_chr->filename);
- if (ivshmem_has_feature(s, IVSHMEM_MSI)) {
- ivshmem_setup_msi(s);
+ if (ivshmem_has_feature(s, IVSHMEM_MSI) &&
+ ivshmem_setup_msi(s)) {
+ error_setg(errp, "msix initialization failed");
+ return;
}
/* we allocate enough space for 16 guests and grow as needed */
@@ -807,8 +828,8 @@ static int pci_ivshmem_init(PCIDevice *dev)
int fd;
if (s->shmobj == NULL) {
- error_report("Must specify 'chardev' or 'shm' to ivshmem");
- exit(1);
+ error_setg(errp, "Must specify 'chardev' or 'shm' to ivshmem");
+ return;
}
IVSHMEM_DPRINTF("using shm_open (shm object = %s)\n", s->shmobj);
@@ -824,24 +845,19 @@ static int pci_ivshmem_init(PCIDevice *dev)
} else if ((fd = shm_open(s->shmobj, O_CREAT|O_RDWR,
S_IRWXU|S_IRWXG|S_IRWXO)) < 0) {
- error_report("could not open shared file");
- exit(1);
-
+ error_setg(errp, "could not open shared file");
+ return;
}
- if (check_shm_size(s, fd) == -1) {
- exit(1);
+ if (check_shm_size(s, fd, errp) == -1) {
+ return;
}
- create_shared_memory_BAR(s, fd, attr);
+ create_shared_memory_BAR(s, fd, attr, errp);
}
-
- dev->config_write = ivshmem_write_config;
-
- return 0;
}
-static void pci_ivshmem_uninit(PCIDevice *dev)
+static void pci_ivshmem_exit(PCIDevice *dev)
{
IVShmemState *s = IVSHMEM(dev);
@@ -873,8 +889,9 @@ static void ivshmem_class_init(ObjectClass *klass, void *data)
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
- k->init = pci_ivshmem_init;
- k->exit = pci_ivshmem_uninit;
+ k->realize = pci_ivshmem_realize;
+ k->exit = pci_ivshmem_exit;
+ k->config_write = ivshmem_write_config;
k->vendor_id = PCI_VENDOR_ID_IVSHMEM;
k->device_id = PCI_DEVICE_ID_IVSHMEM;
k->class_id = PCI_CLASS_MEMORY_RAM;
generated by cgit v1.1 at 2024-12-23 09:54:11 +0000