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Date:   Wed, 21 Sep 2022 15:11:34 -0300
From:   Jason Gunthorpe <jgg@nvidia.com>
To:     Dave Hansen <dave.hansen@intel.com>
Cc:     Ashok Raj <ashok.raj@intel.com>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        Jacob Pan <jacob.jun.pan@intel.com>,
        "Kirill A. Shutemov" <kirill@shutemov.name>,
        Ashok Raj <ashok_raj@linux.intel.com>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Andy Lutomirski <luto@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>, x86@kernel.org,
        Kostya Serebryany <kcc@google.com>,
        Andrey Ryabinin <ryabinin.a.a@gmail.com>,
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        Dmitry Vyukov <dvyukov@google.com>,
        "H . J . Lu" <hjl.tools@gmail.com>,
        Andi Kleen <ak@linux.intel.com>,
        Rick Edgecombe <rick.p.edgecombe@intel.com>,
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        Joerg Roedel <joro@8bytes.org>
Subject: Re: [PATCHv8 00/11] Linear Address Masking enabling
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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.

Jason