VirtIODevice *virtio_blk_init(DeviceState *dev, VirtIOBlkConf *blk) { VirtIOBlock *s; int cylinders, heads, secs; static int virtio_blk_id; DriveInfo *dinfo; if (!blk->conf.bs) { error_report("drive property not set"); return NULL; } if (!bdrv_is_inserted(blk->conf.bs)) { error_report("Device needs media, but drive is empty"); return NULL; } if (!blk->serial) { /* try to fall back to value set with legacy -drive serial=... */ dinfo = drive_get_by_blockdev(blk->conf.bs); if (*dinfo->serial) { blk->serial = strdup(dinfo->serial); } } s = (VirtIOBlock *)virtio_common_init("virtio-blk", VIRTIO_ID_BLOCK, sizeof(struct virtio_blk_config), sizeof(VirtIOBlock)); s->vdev.get_config = virtio_blk_update_config; s->vdev.get_features = virtio_blk_get_features; #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE s->vdev.set_status = virtio_blk_set_status; #endif s->vdev.reset = virtio_blk_reset; s->bs = blk->conf.bs; s->conf = &blk->conf; s->blk = blk; s->rq = NULL; s->sector_mask = (s->conf->logical_block_size / 512) - 1; bdrv_guess_geometry(s->bs, &cylinders, &heads, &secs); bdrv_set_geometry_hint(s->bs, cylinders, heads, secs); s->vq = virtio_add_queue(&s->vdev, 128, virtio_blk_handle_output); #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE if (!virtio_blk_data_plane_create(&s->vdev, blk, &s->dataplane)) { virtio_cleanup(&s->vdev); return NULL; } #endif s->change = qemu_add_vm_change_state_handler(virtio_blk_dma_restart_cb, s); s->qdev = dev; register_savevm(dev, "virtio-blk", virtio_blk_id++, 2, virtio_blk_save, virtio_blk_load, s); #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE if (s->dataplane) { register_device_unmigratable(dev, "virtio-blk", s); } #endif bdrv_set_dev_ops(s->bs, &virtio_block_ops, s); s->bs->buffer_alignment = s->conf->logical_block_size; bdrv_iostatus_enable(s->bs); add_boot_device_path(s->conf->bootindex, dev, "/disk@0,0"); return &s->vdev; }
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; }