Comment 8 for bug 1680679

My uefi build script. If you see an error or issue that could cause error 43 please confirm it:

#!/bin/bash

cd /home/dad/qemu/qemu2
sudo ./up.sh tap0

configfile=./vfio-pci1.cfg

vfiobind() {
    dev="$1"
        vendor=$(cat /sys/bus/pci/devices/$dev/vendor)
        device=$(cat /sys/bus/pci/devices/$dev/device)
        if [ -e /sys/bus/pci/devices/$dev/driver ]; then
                echo $dev > /sys/bus/pci/devices/$dev/driver/unbind
        fi
        echo $vendor $device > /sys/bus/pci/drivers/vfio-pci/new_id

}

modprobe vfio-pci

cat $configfile | while read line;do
    echo $line | grep ^# >/dev/null 2>&1 && continue
        vfiobind $line
done

vmname="windows10vm"

if ps -A | grep -q $vmname; then
   echo "$vmname is already running." &
   exit 1

else

# use pulseaudio
export QEMU_AUDIO_DRV=pa

cp /usr/share/OVMF/OVMF_VARS.fd /tmp/my_vars.fd

qemu-system-x86_64 \
  -name $vmname,process=$vmname \
  -machine type=pc-i440fx-2.6,accel=kvm \
  -cpu host,kvm=off \
  -smp 8,sockets=1,cores=4,threads=2 \
  -enable-kvm \
  -m 4G \
  -mem-path /run/hugepages/kvm \
  -mem-prealloc \
  -balloon none \
  -rtc clock=host,base=localtime \
  -serial none \
  -parallel none \
  -vga none \
  -device vfio-pci,host=01:00.0,multifunction=on \
  -device vfio-pci,host=01:00.1 \
  -drive if=pflash,format=raw,readonly,file=/home/dad/qemu/qemu2/OVMF-pure-efi.fd \
  -drive if=pflash,format=raw,file=/tmp/my_vars.fd \
  -boot order=dc -boot menu=on \
  -device virtio-scsi-pci,id=scsi \
  -drive id=disk0,if=virtio,cache=none,format=raw,file=/home/dad/qemu/qemu2/win7.img \
  -drive file=/home/dad/qemu/qemu2/virtio-win-0.1.126.iso,id=virtiocd,format=raw,if=none -device ide-cd,bus=ide.1,drive=virtiocd \
  -netdev type=tap,id=net0,ifname=tap0,vhost=on,script=no,downscript=no \
  -device virtio-net-pci,netdev=net0,mac=00:16:3e:00:01:01 \
  -usb -usbdevice host:413c:a503 -usbdevice host:13fe:3100

sudo ./down.sh tap0
   exit 0
fi