6.3 zfs Raid1 boot mirror can't add iommu=on to grub...?

[peters77]

HI,

I ran a Proxmox 6.2 on ext4 root disk and updated to 6.3. All well. I did hardware pici passthrough, all woks fine.
I now want to change the version to 6.3 and azfs raid 1 root mirror as root disk. I first updted the ext4 version to 6.3, all well. I backuped all and did a fresh install wit zfs root mirror. But now I can't IOMMU up running. Same machine, same settings, just changed the boot disk filesystem.
I add iommu=on , run update-grub, even tried pve-efiboot-tool refresh.
After reboot, iommu is not enabled, did all this several times like here:

https://pve.proxmox.com/wiki/Pci_passthrough

But my dmesg still shows in the first line:

[ 0.000000] Linux version 5.4.73-1-pve (build@pve) (gcc version 8.3.0 (Debian 8.3.0-6)) #1 SMP PVE 5.4.73-1 (Mon, 16 Nov 2020 10:52:16 +0100) ()
[ 0.000000] Command line: initrd=\EFI\proxmox\5.4.73-1-pve\initrd.img-5.4.73-1-pve root=ZFS=rpool/ROOT/pve-1 boot=zfs

..so iommu=on is missing!?

I can't figure out why update-grub or pve-efiboot-tool refresh seems not to update the boot line!? With ext4 root disk it works!? Any idea howto solve this and get it working!?

Thanks in advance!

Regards,

Christian

 

[dcsapak]

please look at the reference docs:
https://pve.proxmox.com/wiki/PCI(e)_Passthrough#_general_requirements
https://pve.proxmox.com/wiki/Host_Bootloader#sysboot_edit_kernel_cmdline

(zfs + uefi uses systemd-boot not grub)

 

[peters77]

Thank you very much. Did a fresh reinstall and used this more recent site you posted:

https://pve.proxmox.com/wiki/PCI(e)_Passthrough#_general_requirements

All well now. I was not aware my bootloader changed to UEFI.

Regards,

Christian