dumping notes to have ios passthrough to qEMU
- archlinux distrib
- NUC8 machine
warning unbind doesn't work !!
intel_iommu=on iommu=pt
lspci | grep USB
00:14.0 USB controller: Intel Corporation Cannon Point-LP USB 3.1 xHCI Controller (rev 30)
6c:00.0 USB controller: Intel Corporation JHL6340 Thunderbolt 3 USB 3.1 Controller (C step) [Alpine Ridge 2C 2016] (rev 02)
find /sys/kernel/iommu_groups/ -type l | grep 6c
/sys/kernel/iommu_groups/16/devices/0000:6c:00.0
group 16
create /usr/bin/vfio-bind
and chmoded it 755
#!/bin/bash
modprobe vfio-pci
for dev in "$@"; do
vendor=$(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
done
lspci -v
- add before launching qemu
/usr/bin/vfio-bind 0000:6c:00.0
- add after qemu returns
echo 0000:6c:00.0 > /sys/bus/pci/drivers/vfio-pci/unbind
echo 0000:6c:00.0 > /sys/bus/pci/drivers/xhci-hcd/bind