Re: [PATCH v8 04/15] iommupt: Add the AMD IOMMU v1 page table format

Randy Dunlap
2025-11-04T18:52:01Z

On 11/4/25 10:30 AM, Jason Gunthorpe wrote:
> diff --git a/drivers/iommu/generic_pt/Kconfig b/drivers/iommu/generic_pt/Kconfig
> index a81dfdd72ca016..cbdad222923b26 100644
> --- a/drivers/iommu/generic_pt/Kconfig
> +++ b/drivers/iommu/generic_pt/Kconfig
> @@ -30,4 +30,16 @@ config IOMMU_PT
> related to struct iommu_domain using GENERIC_PT. It provides a single
> implementation of the page table operations that can be shared by
> multiple drivers.
> +
> +if IOMMU_PT
> +config IOMMU_PT_AMDV1
> + tristate "IOMMU page table for 64-bit AMD IOMMU v1"
> + 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.

a full
or

the full

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

--
~Randy