Re: [RFC PATCH 14/42] iommufd: Enable KVM HW page table object to be proxy between KVM and IOMMU

Jason Gunthorpe
2023-12-04T18:34:13Z

On Sat, Dec 02, 2023 at 05:22:16PM +0800, Yan Zhao wrote:
> +config IOMMUFD_KVM_HWPT
> + bool "Supports KVM managed HW page tables"
> + default n
> + help
> + Selecting this option will allow IOMMUFD to create IOMMU stage 2
> + page tables whose paging structure and mappings are managed by
> + KVM MMU. IOMMUFD serves as proxy between KVM and IOMMU driver to
> + allow IOMMU driver to get paging structure meta data and cache
> + invalidate notifications from KVM.

I'm not sure we need a user selectable kconfig for this..

Just turn it on if we have kvm turned on an iommu driver implements it

Jason