Booting a DragonFly kernel directly from qemu

[Autumn Jolitz]

Hi,

I ran across a dev article on porting FreeBSD to the qemu microvm (https://adventurist.me/posts/00320).

It got me wondering if DragonFly is capable of a similar feat, so I tried to see if I could directly boot into a Dragonfly kernel using something like:

1. Build a kernel

 sudo -H make -C /usr/src -j 16 -s nativekernel KERNCONF=X86_64_GENERIC TARGET=amd64

2. Create a raw image

qemu-img create tmp.raw 30M

3. Boot directly from a kernel (?) [this part hangs at the “Booting from ROM…” SeaBIOS message) :( 

qemu-system-x86_64 -M pc-i440fx-3.1 -cpu max -m 512m -smp 4 -kernel /usr/obj/usr/src/sys/X86_64_GENERIC/kernel.debug -nographic -drive id=test,file=tmp.raw,format=raw,if=none -device virtio-blk-pci,drive=test

Autumn