/* We only allow 48-bit addresses with softpin because knowing the actual
 * address is required for the vertex cache flush workaround.
 */
device->supports_48bit_addresses = (device->info.gen >= 8) &&
                                   device->has_softpin &&
                                   device->gtt_size > (4ULL << 30 /* GiB */);

device->use_softpin = device->has_softpin &&
                      device->supports_48bit_addresses;