Adding `intel_iommu=on` to kernel command line

Hi, I am currently going through a guide which tells me this:

Activate Intel VT-d in the kernel by appending the intel_iommu=on parameter to the kernel line of the kernel line in the /boot/grub/grub.conf file.

I don’t know how to access and use the kernel as I have never done it before. Can you please explain me how exactly I execute this step?

I am using Fedora 34, Gnome. Thank you very much!

sudo grubby --update-kernel=ALL --args=“intel_iommu=on”

reboot

To remove

sudo grubby --update-kernel=ALL --remove-args=“intel_iommu”

reboot

But I think this feature should be enabled from bios/UEFI (If supported ).

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