- use virtio ccw bus by default - bump install_timeout to 30 minutes (kvm on zvm can be slow, installing things across the atlantic) - query "default" architecture from python - add zipl support - use a bootloader agnostic "successful" installation watermark - vmtests: Add arch_skip field to allow vmtests to be skipped on specific arches For example, bcache is currently broken on s390x, and uefi will never work.