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

[Yan Zhao]

On Mon, Dec 04, 2023 at 02:34:10PM -0400, Jason Gunthorpe wrote:
> 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
>
Got it, thanks!