static void ivshmem_common_realize(PCIDevice *dev, Error **errp) { IVShmemState *s = IVSHMEM_COMMON(dev); Error *err = NULL; uint8_t *pci_conf; uint8_t attr = PCI_BASE_ADDRESS_SPACE_MEMORY | PCI_BASE_ADDRESS_MEM_PREFETCH; Error *local_err = NULL; /* IRQFD requires MSI */ if (ivshmem_has_feature(s, IVSHMEM_IOEVENTFD) && !ivshmem_has_feature(s, IVSHMEM_MSI)) { error_setg(errp, "ioeventfd/irqfd requires MSI"); return; } pci_conf = dev->config; pci_conf[PCI_COMMAND] = PCI_COMMAND_IO | PCI_COMMAND_MEMORY; 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); if (s->not_legacy_32bit) { attr |= PCI_BASE_ADDRESS_MEM_TYPE_64; } if (s->hostmem != NULL) { IVSHMEM_DPRINTF("using hostmem\n"); s->ivshmem_bar2 = host_memory_backend_get_memory(s->hostmem, &error_abort); } else { Chardev *chr = qemu_chr_fe_get_driver(&s->server_chr); assert(chr); IVSHMEM_DPRINTF("using shared memory server (socket = %s)\n", chr->filename); /* we allocate enough space for 16 peers and grow as needed */ resize_peers(s, 16); /* * Receive setup messages from server synchronously. * Older versions did it asynchronously, but that creates a * number of entertaining race conditions. */ ivshmem_recv_setup(s, &err); if (err) { error_propagate(errp, err); return; } if (s->master == ON_OFF_AUTO_ON && s->vm_id != 0) { error_setg(errp, "master must connect to the server before any peers"); return; } qemu_chr_fe_set_handlers(&s->server_chr, ivshmem_can_receive, ivshmem_read, NULL, s, NULL, true); if (ivshmem_setup_interrupts(s) < 0) { error_setg(errp, "failed to initialize interrupts"); return; } } if (s->master == ON_OFF_AUTO_AUTO) { s->master = s->vm_id == 0 ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF; } if (!ivshmem_is_master(s)) { error_setg(&s->migration_blocker, "Migration is disabled when using feature 'peer mode' in device 'ivshmem'"); migrate_add_blocker(s->migration_blocker, &local_err); if (local_err) { error_propagate(errp, local_err); error_free(s->migration_blocker); return; } } vmstate_register_ram(s->ivshmem_bar2, DEVICE(s)); pci_register_bar(PCI_DEVICE(s), 2, attr, s->ivshmem_bar2); }