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

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