How to enable Iommu on UEFI Proxmox

[@mohammedalzahid9311]

Thank you for so much. I've been waiting for simple and practical guide like this to enable IOMMU. This is the only one that connected the dots so simple. Thank you so much million times for this.

[@idotechllc]

in my case after following the steps and ran the last command :dmesg | grep -e DMAR -e IOMMU
: it does not show IOMU Enable, in fact the output looks different and shorter.
any idea?

[@MIKESALLSURE]

Same with me mine just returns the same.
root@pve:~# dmesg | grep -e DMAR -e IOMMU
[ 0.128948] DMAR: IOMMU enabled
root@pve:~# ^C
This is what I did
Edit the GRUB configuration file:
text
nano /etc/default/grub
Add IOMMU parameters to the GRUB_CMDLINE_LINUX_DEFAULT line:
text
GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on iommu=pt"
Update GRUB:
text
update-grubEdit the GRUB configuration file:
text
nano /etc/default/grub
Add IOMMU parameters to the GRUB_CMDLINE_LINUX_DEFAULT line:
text
GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on iommu=pt"
Update GRUB:
text
update-grub
Edit the kernel command line:
text
nano /etc/kernel/cmdline
Add the same parameters to the end of the line:
text
root=ZFS=rpool/ROOT/pve-1 boot=zfs quiet intel_iommu=on iommu=pt
Update the boot configuration:
text
proxmox-boot-tool refresh
Update the initramfs:
text
update-initramfs -u
Additional Steps
Load the VFIO modules by editing /etc/modules:
text
vfio
vfio_iommu_type1
vfio_pci
vfio_virqfd
Reboot the system
Verification
After rebooting, verify IOMMU is enabled:
text
dmesg | grep -e DMAR -e IOMMU
Edit the kernel command line:
text
nano /etc/kernel/cmdline
Add the same parameters to the end of the line:
text
root=ZFS=rpool/ROOT/pve-1 boot=zfs quiet intel_iommu=on iommu=pt
Update the boot configuration:
text
proxmox-boot-tool refresh
Update the initramfs:
text
update-initramfs -u
Additional Steps
Load the VFIO modules by editing /etc/modules:
text
vfio
vfio_iommu_type1
vfio_pci
vfio_virqfd
Reboot the system
Verification
After rebooting, verify IOMMU is enabled:
text
dmesg | grep -e DMAR -e IOMMU

[@idotechllc]

@@MIKESALLSURE you need to enable IOMMU in the grub

[@SB-qm5wg]

Right to the point. ty

[@kristof9497]

Thanks