Re: [PATCHv8 00/11] Linear Address Masking enabling

[Kirill A. Shutemov]

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