Re: [PATCH] iommu: Documentation: rearrange, update kernel-parameters

From: Jonathan Corbet

Date: Mon Jun 01 2026 - 14:59:10 EST


Randy Dunlap <rdunlap@xxxxxxxxxxxxx> writes:

> Add text for some undescribed iommu= parameters (merge, nomerge,
> biomerge, panic, nopanic, pt, nopt). Add "usedac" and its description.
> Add that iommu=pt is equivalent to iommu.passthrough=1
> and that iommu=nopt is equivalent to iommu.passthrough=0.
>
> Move the PPC/POWERNV heading & its option "nobypass" to a separate
> area since the current "iommu=" applies only to X86 (according to
> its heading).
>
> Unindent the AMD GART IOMMU options heading to make it stand out.
> Also add its kconfig symbol name to be explicit about what these
> options apply to.
>
> Make sure that the IOMMU options that are listed under AMD Gart
> HW IOMMU-specific options are only for that product; i.e., add "force"
> there and move "merge", "nomerge", and "panic" to the general IOMMU
> options area.

Applied, thanks.

jon