#!/bin/sh
set -eu

# Run qemu-system for the system architecture

if test "$#" -lt 3; then
	echo "${0##*/}: Error: Not enough parameters." >&2
	echo "Usage: ${0##*/} kernel initrd append [extra_args]" >&2
	exit 1
fi

kernel="$1"
initrd="$2"
append="$3"
shift 3

ARCHITECTURE=$(dpkg --print-architecture)

case "$ARCHITECTURE" in
arm64)
	machine="virt,gic-version=max"
	cpu="max,pauth-impdef=on"
	efi_code=/usr/share/AAVMF/AAVMF_CODE.fd
	efi_vars=/usr/share/AAVMF/AAVMF_VARS.fd
	;;
armhf)
	machine="virt"
	efi_code=/usr/share/AAVMF/AAVMF32_CODE.fd
	efi_vars=/usr/share/AAVMF/AAVMF32_VARS.fd
	console=ttyAMA0
	;;
ppc64el)
	machine="cap-ccf-assist=off,cap-cfpc=broken,cap-ibs=broken,cap-sbbc=broken"
	console=hvc0
	;;
esac

if test -f "${efi_vars-}"; then
	efi_vars_copy="$(mktemp -t "${efi_vars##*/}.XXXXXXXXXX")"
	cp "$efi_vars" "$efi_vars_copy"
fi

set -- ${machine:+-machine "${machine}"} -cpu "${cpu-max}" -m 1G \
	${efi_code:+-drive "file=${efi_code},if=pflash,format=raw,read-only=on"} \
	${efi_vars:+-drive "file=${efi_vars_copy},if=pflash,format=raw"} \
	-device virtio-rng-pci,rng=rng0 -object rng-random,filename=/dev/urandom,id=rng0 \
	-nodefaults -no-reboot -kernel "${kernel}" -initrd "${initrd}" "$@" \
	-append "console=${console:-ttyS0},115200 ro ${append}"
echo "${0##*/}: qemu-system-${ARCHITECTURE} $*"
exec "qemu-system-${ARCHITECTURE}" "$@"