- arch='x86_64', engine='kvm', memory=8192, bootdev='network',
- cpus=4, nic_driver='virtio', macs=[], direct_boot=None,
- kernel_args=None, default_network=False,
+ arch=platform.machine(), engine='kvm', memory=8192,
+ bootdev='network', cpus=4, nic_driver='virtio', macs=[],
+ direct_boot=None, kernel_args=None, default_network=False,