#!/bin/sh -e
##########################################################################
# Synopsis:
# qemu-freebsd-guest version RAM-size processors
#
# Description:
# Boot a FreeBSD instance under QEMU, downloading and
# installing a VM image first if necessary.
#
# History:
# Date Name Modification
# 2024-07-23 Jason Bacon Begin
##########################################################################
usage()
{
printf "Usage: $0 version ramsize (MiB) processors\n"
printf "Example: $0 14.1-RELEASE 2048 4\n"
exit 1
}
##########################################################################
# Main
##########################################################################
if [ $# != 3 ]; then
usage
fi
version=$1
suffix=${version##*-}
ramsize=$2
procs=$3
case $(uname -m) in
arm64)
if [ $(uname) = Darwin ]; then
host_mem=$(sysctl -n hw.memsize)
host_mem=$(($host_mem / 1024 / 1024))
allowed_mem=$(($host_mem - 2 * 1024))
echo $allowed_mem
#exit
if [ $ramsize -gt $allowed_mem ]; then
printf "Error: Maximum ramsize is $allowed_mem.\n" >> /dev/stderr
exit 1
fi
arch=aarch64
# https://download.freebsd.org/releases/VM-IMAGES/14.1-RELEASE/aarch64/Latest/
if [ $suffix = RELEASE ] || [ $(echo $suffix | cut -c 1-2) = RC ]; then
remote_dir=releases/VM-IMAGES/$version/aarch64/Latest/
else
remote_dir=snapshots/VM-IMAGES/$version/aarch64/Latest/
fi
image=FreeBSD-$version-arm64-aarch64.raw
cpu=cortex-a57
bios=edk2-aarch64-code.fd
machine=virt,accel=hvf
else
printf "arm64 is only supported on macOS.\n" >> /dev/stderr
exit 1
fi
;;
*)
printf "$(uname -m) is not currently supported.\n"
exit 1
;;
esac
qemu_dir=~/Qemu
if [ ! -e $qemu_dir/$image ]; then
if [ ! -e $qemu_dir/$image.xz ]; then
site=https://download.freebsd.org/
mkdir -p $qemu_dir
cd $qemu_dir
curl -O $site/$remote_dir/$image.xz
fi
printf "Decompressing $image...\n"
unxz $qemu_dir/$image.xz
size=20G
printf "Expanding $image to $size...\n"
truncate -s $size $qemu_dir/$image
fi
# https://wiki.freebsd.org/arm64/QEMU
# Enable ssh via TCP port 8022
# Must add sshd_enable="YES" to /etc/rc.conf and run "service sshd start"
qemu-system-$arch -m $ramsize -cpu host \
-bios $bios -M $machine -nographic \
-smp $procs \
-drive if=virtio,file=$qemu_dir/$image,id=hd0,format=raw \
-netdev user,id=net0,hostfwd=tcp::8022-:22 \
-device virtio-net,netdev=net0
# Alt: https://dev.to/krjakbrjak/qemu-networking-on-macos-549k
# -netdev vmnet-bridged,id=net0,ifname=en0
# Above requires qemu running as root. Look into socket_vmnet.
asahilinux.org
