Enabling IOMMU on J4125 with 4 Intel i225 2.5G

[casperse]

Hi All

I bought this small mini PC and I am trying to passthrough two of the LAN's for Pfsense
Following this guide:
https://www.servethehome.com/how-to-pass-through-pcie-nics-with-proxmox-ve-on-intel-and-amd/

Unfortunately I cant get the IOMMU enabled?

1) Fresh install of Proxmox ve 7.1-2
2) Setup VM for pfsense:


I did not start the VM

1) Determine if you are Using GRUB or systemd


2) nano /etc/kernel/cmdline
No such file existed? so I created one and added:


3) Now we need to refresh our boot tool.


4) Add Modules


5) Reboot

6) dmesg | grep -e DMAR -e IOMMU




I don't get the..... "IOMMU enabled"

What am I doing wrong?

Regards
/Casperse

 

[casperse]

And I have enabled "Intel VT-d" option in the BIOS

 

[leesteken]

You did not have a /etc/kernel/cmdline because you are not using ZFS. systemd-boot is only used then you boot (with UEFI) from ZFS (rpool). Please remove /etc/kernel/cmdline again to prevent confusion in the future. You also don't need to run proxmox-boot-tool, because you are not booting from ZFS.

Please add the intel_iommu=on to the correct place in /etc/default/grub and run update-grub and reboot. You can check with cat /proc/cmdline if the intel_iommu=on is applied.

To check if IOMMU is working and get a nice overview of the IOMMU groups, use for d in /sys/kernel/iommu_groups/*/devices/*; do n=${d#*/iommu_groups/*}; n=${n%%/*}; printf 'IOMMU group %s ' "$n"; lspci -nns "${d##*/}"; done

 

[casperse]

SOLUTION: Do the GRUB also.......
And delete the /etc/kernel/cmdline

Thanks - Me reading the Guide it said only do GRUB if the system is not BOOTX64

 

[casperse]

One thing I now have two passthrough NIC's
And one MGMT LAN for Proxmox

How do I define the "missing" LAN that is free for a Proxmox virtual bridge?


Also strange its called eno1?

And not
enp1s0
enp2s0
enp3so
enp4so

I need to find 0000:02:00:0 15 ?



Sorry Proxmox is new to me

 

[casperse]

Hi leesteken
How to validate this is correct?