static int create_shared_memory_BAR(IVShmemState *s, int fd, uint8_t attr, Error **errp) { void * ptr; 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); vmstate_register_ram(&s->ivshmem, DEVICE(s)); memory_region_add_subregion(&s->bar, 0, &s->ivshmem); /* region for shared memory */ pci_register_bar(PCI_DEVICE(s), 2, attr, &s->bar); return 0; }