GitHub - marcelo-gonzalez/vfio-config: Tool to help bind a PCI device and its IOMMU group to the VFIO driver.

marcelo-gonzalez / vfio-config Public

Notifications You must be signed in to change notification settings
Fork 2
Star 16

Tool to help bind a PCI device and its IOMMU group to the VFIO driver.

Notifications

Name		Name	Last commit message	Last commit date
Latest commit History 24 Commits
.gitignore		.gitignore
LICENSE		LICENSE
Makefile		Makefile
README		README
go.mod		go.mod
go.sum		go.sum
main.go		main.go

Repository files navigation

Tool to help bind a PCI device and its IOMMU group to the VFIO driver.

For example, to bind the PCI device backing a network interface to the
VFIO driver for use in a VM via passthrough:

# ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 01:02:03:04:05:06 brd ff:ff:ff:ff:ff:ff
#
# su
# modprobe vfio-pci
# vfio-config bind eth0
eth0 => 0000:05:00.0
0000:05:00.0 now bound to vfio-pci
0000:08:00.0 now bound to vfio-pci
0000:01:00.0 now bound to vfio-pci
0000:06:00.0 now bound to vfio-pci
0000:01:00.1 now bound to vfio-pci


Now passthrough should be possible:

# qemu-system-x86_64 -enable-kvm -hda ~/my.img -kernel ~/linux/arch/x86/boot/bzImage \
  -append "root=/dev/foo rw" -device vfio-pci,host=05:00.0 -nic none

To reset the group just bound:

# vfio-config reset --group 0000:05:00.0
Removed 0000:05:00.0
Removed 0000:08:00.0
Removed 0000:01:00.0
Removed 0000:06:00.0
Removed 0000:01:00.1
Issued PCI bus rescan