static int virtio_gpu_load(QEMUFile *f, void *opaque, size_t size,
                           VMStateField *field)
{
    VirtIOGPU *g = opaque;
    struct virtio_gpu_simple_resource *res;
    struct virtio_gpu_scanout *scanout;
    uint32_t resource_id, pformat;
    int i;

    g->hostmem = 0;

    resource_id = qemu_get_be32(f);
    while (resource_id != 0) {
        res = g_new0(struct virtio_gpu_simple_resource, 1);
        res->resource_id = resource_id;
        res->width = qemu_get_be32(f);
        res->height = qemu_get_be32(f);
        res->format = qemu_get_be32(f);
        res->iov_cnt = qemu_get_be32(f);

        /* allocate */
        pformat = get_pixman_format(res->format);
        if (!pformat) {
            g_free(res);
            return -EINVAL;
        }
        res->image = pixman_image_create_bits(pformat,
                                              res->width, res->height,
                                              NULL, 0);
        if (!res->image) {
            g_free(res);
            return -EINVAL;
        }

        res->hostmem = PIXMAN_FORMAT_BPP(pformat) * res->width * res->height;

        res->addrs = g_new(uint64_t, res->iov_cnt);
        res->iov = g_new(struct iovec, res->iov_cnt);

        /* read data */
        for (i = 0; i < res->iov_cnt; i++) {
            res->addrs[i] = qemu_get_be64(f);
            res->iov[i].iov_len = qemu_get_be32(f);
        }
        qemu_get_buffer(f, (void *)pixman_image_get_data(res->image),
                        pixman_image_get_stride(res->image) * res->height);

        /* restore mapping */
        for (i = 0; i < res->iov_cnt; i++) {
            hwaddr len = res->iov[i].iov_len;
            res->iov[i].iov_base =
                cpu_physical_memory_map(res->addrs[i], &len, 1);
            if (!res->iov[i].iov_base || len != res->iov[i].iov_len) {
                /* Clean up the half-a-mapping we just created... */
                if (res->iov[i].iov_base) {
                    cpu_physical_memory_unmap(res->iov[i].iov_base,
                                              len, 0, 0);
                }
                /* ...and the mappings for previous loop iterations */
                res->iov_cnt = i;
                virtio_gpu_cleanup_mapping(res);
                pixman_image_unref(res->image);
                g_free(res);
                return -EINVAL;
            }
        }

        QTAILQ_INSERT_HEAD(&g->reslist, res, next);
        g->hostmem += res->hostmem;

        resource_id = qemu_get_be32(f);
    }

    /* load & apply scanout state */
    vmstate_load_state(f, &vmstate_virtio_gpu_scanouts, g, 1);
    for (i = 0; i < g->conf.max_outputs; i++) {
        scanout = &g->scanout[i];
        if (!scanout->resource_id) {
            continue;
        }
        res = virtio_gpu_find_resource(g, scanout->resource_id);
        if (!res) {
            return -EINVAL;
        }
        scanout->ds = qemu_create_displaysurface_pixman(res->image);
        if (!scanout->ds) {
            return -EINVAL;
        }

        dpy_gfx_replace_surface(scanout->con, scanout->ds);
        dpy_gfx_update(scanout->con, 0, 0, scanout->width, scanout->height);
        update_cursor(g, &scanout->cursor);
        res->scanout_bitmask |= (1 << i);
    }

    return 0;
}