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SubjectRe: [PATCHv8 00/11] Linear Address Masking enabling
On Wed, Sep 21, 2022 at 03:11:34PM -0300, Jason Gunthorpe wrote:
> On Wed, Sep 21, 2022 at 10:11:46AM -0700, Dave Hansen wrote:
>
> > Are you saying that any device compatibility with an mm is solely
> > determined by the IOMMU in play, so the IOMMU code should host the mm
> > compatibility checks?
>
> Yes, exactly. Only the HW entity that walks the page tables needs to
> understand their parsing rules and in this case that is only the IOMMU
> block.

But device has to know what bits of the virtual address are significant to
handle device TLB lookup/store correctly, no?

--
Kiryl Shutsemau / Kirill A. Shutemov

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