runefivm.sh

#!/bin/bash

efi=${EFI-/usr/share/AAVMF/AAVMF_CODE.fd}
efivar=${EFIVAR-/home/maz/disk-images/stretch-arm64-efi-vars.fd}
disk=${DISK-/home/maz/disk-images/stretch-arm64.img}
bus=${BUS-pci}
netif=${NETIF}
gic=${GIC-host}
bit=${BIT-64}
cpus=${CPUS-4}
ram=${RAM-1G}
cdrom=${CDROM-nocdimage}
qemu=${QEMU-/usr/bin/qemu-system-aarch64}

if [ "$bit" = 64 ]; then
	sf=on
else
	sf=off
fi

qvers=$(qemu-system-aarch64 --version| cut -f4 -d' ' | cut -f1,2 -d.)
qversmaj=$(echo $qvers | cut -f1 -d.)
qversmin=$(echo $qvers | cut -f2 -d.)

# Disable virtio legacy if < 2.7
if [ $qversmaj -eq 2 -a $qversmin -ge 7 ]; then
    if [ $bus = pci ]; then
	virtio=",disable-legacy=on"
    fi
fi

if [ "$cdrom" != nocdimage ]; then
	cddev="-drive file=$cdrom,id=cdrom,if=none,media=cdrom	\
	       -device virtio-scsi-$bus$virtio			\
	       -device scsi-cd,drive=cdrom"
fi

if [ -z "$netif" -o $bus != pci ]; then

	netdev="-netdev user,id=hostnet0 -device virtio-net-$bus$virtio,netdev=hostnet0"

elif [ -e /dev/tap$(< /sys/class/net/$netif/ifindex) ]; then

	addr=$(< /sys/class/net/$netif/address)
	tap=/dev/tap$(< /sys/class/net/$netif/ifindex)
	mq=$((`ls -1 /sys/class/net/$netif/queues/ | wc -l ` / 2))
	tapfd=128

	tapfds="$(($tapfd))"
	tapredir="$(($tapfd))<>$tap"
	vhfds="$(($tapfd+$mq))"
	vhredir="$(($tapfd+$mq))<>/dev/vhost-net"

	for i in `seq 1 $(($mq-1))`
	do
		tapfds+=":$((i+$tapfd))"
		tapredir+=" $((i+$tapfd))<>$tap"
		vhfds+=":$((i+$tapfd+$mq))"
		vhredir+=" $((i+$tapfd+$mq))<>/dev/vhost-net"
	done

	netdev="-netdev tap,fds=$tapfds,id=hostnet0,vhost=on,vhostfds=$vhfds \
		-device virtio-net-$bus$virtio,mac=$addr,netdev=hostnet0,mq=on,vectors=$((2*$mq+2))"

else
	mq=$((`ls -1 /sys/class/net/$netif/queues/ | wc -l ` / 2))
	mq=4
	vectors="mq=on,vectors=$((2*$mq+2))"
	suffix=`echo $disk | md5sum | sed -e 's/^\(..\)\(..\)\(..\)\(.*\)/\1:\2:\3/'`
	netdev="-netdev tap,vhost=on,queues=$mq,id=hostnet0,ifname=$netif,script=no,downscript=no \
		-device virtio-net-$bus$virtio,netdev=hostnet0,mac=5a:fe:00:$suffix,$vectors"
fi

args="  -m 1024 -smp $cpus -cpu host,aarch64=$sf -machine virt,accel=kvm,gic_version=$gic \
	-nographic \
	-drive if=pflash,format=raw,readonly,file=$efi \
	-drive if=pflash,format=raw,file=$efivar \
	$netdev \
	-drive if=none,format=raw,file=$disk,id=disk0 \
	-device virtio-blk-$bus$virtio,drive=disk0 \
	$cddev \
	$* \
	$tapredir $vhredir \
"

dtb=`mktemp -p tmp --suffix=.dtb`
dts=`mktemp -p tmp --suffix=.dts`

dtc -q -I fs /sys/firmware/devicetree/base/ | grep fsl,erratum-a008585 && (
echo Enabling erratum for fsl,erratum-a008585

eval "$qemu -machine dumpdtb=$dtb $args"
dtc -I dtb $dtb > $dts

cat <<EOF >>$dts
&{/timer} {
	fsl,erratum-a008585;
};
EOF

dtc -I dts -O dtb -o $dtb $dts
) && forcedtb="-dtb $dtb"

rm $dts
eval "$qemu $forcedtb $args"
rm $dtb