Re: [PATCH v4 04/15] iommupt: Add the AMD IOMMU v1 page table format

[Randy Dunlap]

On 8/26/25 10:18 AM, Jason Gunthorpe wrote:
> diff --git a/drivers/iommu/generic_pt/Kconfig 
> b/drivers/iommu/generic_pt/Kconfig
> index c35ddc7c827e92..1867e8d74b4be9 100644
> --- a/drivers/iommu/generic_pt/Kconfig
> +++ b/drivers/iommu/generic_pt/Kconfig
> @@ -29,4 +29,16 @@ config IOMMU_PT
>         IOMMU_PT provides an implementation of the page table operations
>         related struct iommu_domain using GENERIC_PT to abstract the page
>         table format.
> +
> +if IOMMU_PT
> +config IOMMU_PT_AMDV1
> +     tristate "IOMMU page table for 64 bit AMD IOMMU v1"

                                       64-bit

> +     depends on !GENERIC_ATOMIC64 # for cmpxchg64
> +     help
> +       iommu_domain implementation for the AMD v1 page table. AMDv1 is the
> +       "host" page table. It supports granular page sizes of almost every
> +       power of 2 and decodes an full 64 bit IOVA space.

                                         64-bit

> +
> +       Selected automatically by an IOMMU driver that uses this format.
> +endif

-- 
~Randy