Can the mtl library run on a ubantu virtual machine

[zzwzds]

I tried to turn on iommu on the virtual machine but failed. I don't know if I need to turn on some setting in the BIOS on my host machine. My host machine is a laptop with an AMD CPU.

[PanKaker]

Hi!

Thank you for reaching out.

Usually IOMMU enabled by default in BIOS, but it worth to check it.

1. Please check that your processor support AMD-V feature (also known as AMD IOMMU/ Virtualization).
2. Enable IOMMU in BIOS:
   Once in the BIOS/UEFI settings, follow these general steps:
   Navigate to the Advanced or CPU Configuration section:
   Look for an option related to IOMMU or AMD-V: The exact name may vary based on your laptop's manufacturer. Some possible names include:

IOMMU
AMD IOMMU
SVM Mode (for AMD-V support)
IOMMU Support
AMD-V (sometimes listed as AMD Virtualization)

Enable IOMMU or AMD-V: If you find this option, enable it, save the bios settings and exit.

3. Configure your virtual machine.
   Depending on the virtualization software you are using (e.g., VirtualBox, VMware, KVM), you may need to enable IOMMU or passthrough settings in the virtual machine configuration.

Here is an example for VirtualBox:

Open VirtualBox and select your VM.
Go to Settings > System > Acceleration.
Enable VT-x/AMD-V and Nested Paging.
Save the settings and start the VM.

If it won't help please share with us more details of your HW and SW:

• CPU model.
• Virtualization Software.
• OS configuration.

[zzwzds]

I found that after I started Iommu, I still couldn't bind the vfio-pci driver. The error was as follows:

dpdk-devbind.py -b vfio-pci 0000:02:06.0
Error: bind failed for 0000:02:06.0 - Cannot bind to driver vfio-pci: [Errno 22] Invalid argument
Error: unbind failed for 0000:02:06.0 - Cannot open /sys/bus/pci/drivers//unbind: [Errno 13] Permission denied: '/sys/bus/pci/drivers//unbind'

Do you know why?

[PanKaker]

Hi!

Could you please share the output of
dpdk-devbind.py -s?

Please don't forget to use sudo/root when you use dpdk-devbind.py script.

[zzwzds]

root@ubantu22:~# dpdk-devbind.py -s

Network devices using kernel driver

0000:02:01.0 '82545EM Gigabit Ethernet Controller (Copper) 100f' if=ens33 drv=e1000 unused=vfio-pci Active
0000:02:05.0 '82545EM Gigabit Ethernet Controller (Copper) 100f' if=ens37 drv=e1000 unused=vfio-pci Active

Other Network devices

0000:02:06.0 '82545EM Gigabit Ethernet Controller (Copper) 100f' unused=e1000,vfio-pci

No 'Baseband' devices detected

No 'Crypto' devices detected

No 'DMA' devices detected

No 'Eventdev' devices detected

No 'Mempool' devices detected

No 'Compress' devices detected

No 'Misc (rawdev)' devices detected

No 'Regex' devices detected

No 'ML' devices detected

root@ubantu22:~# dpdk-devbind.py -b vfio-pci 0000:02:06.0
Error: bind failed for 0000:02:06.0 - Cannot bind to driver vfio-pci: [Errno 22] Invalid argument

[DawidWesierski4]

Hi, it seems that the issue is Not having the dpdk device bound to the interface.

The dpdk backend needs you to bind your VF / PF function to the dpdk driver
in this project, the dpdk needs to be patched

So what you are looking for in your setup is to have
Network devices using DPDK-compatible driver

your interface

For it to work
I am not that familiar with your setup but there is quite a procedure

please try

export mtl_src_path= here the path to your mtl

chmod 777 -R /dev/vfio
mkdir -p /tmp/hugepages /hugepages
for pt in /sys/devices/system/node/node*
do
    # sysctl -w vm.nr_hugepages=4096
    echo 32768 > "$pt/hugepages/hugepages-2048kB/nr_hugepages";
    echo 0 > "$pt/hugepages/hugepages-1048576kB/nr_hugepages";
done
mount -t hugetlbfs hugetlbfs /tmp/hugepages -o pagesize=2M
mount -t hugetlbfs hugetlbfs /hugepages -o pagesize=1G

output=$(lspci | grep "Ethernet controller: Intel Corporation Ethernet Controller" | awk '{print "0000:"$1}')
IFS=$'\n'

NICCTL=$(find "${mtl_source_code}" -name "nicctl.sh" -print -quit 2>/dev/null);
if [ -z "$NICCTL" ]; then
    echo -e '\e[31mnicctl.sh script not found inside '"${mtl_source_code}"'\e[0m'
fi

while IFS= read -r line; do
    if ! "$NICCTL" create_vf "$line" ; then
        echo -e '\e[31mError occurred while creating VF for device: '"$line"'\e[0m'
    fi
done <<< "$output"

the fact that the interfaces are not showing up with dpdk-devbind.py -s means that something is wrong with the environment
and the script above does most of the setup for dpdk.

If this does not work
Are you sure all of the steps form were followed?
Maybe redo the build.md steps?
doc/build.md

Does it work on the bare-metal machine?

[DawidWesierski4]

Closing due to inactivity