Sorry we didn't make this clearer on that page: those defconfigs build an x86-pc image; not an ARM image. Could you try running Qemu again,
but with something similar to,
qemu-system-i386 -m <WHATEVER_RAM_SIZE_YOU_WANT> -kernel <SEL4_KERNEL_IMAGE> -initrd <CAPDL_INITRD_IMAGE>
And tell me what happens? Sorry for the inconvenience.
--
Kofi Doku Atuah
Kernel engineer
DATA61 | CSIRO