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    SubjectRe: [PATCH v8 4/5] x86/mm: Add noalias variants of set_memory_*crypted() functions
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    >
    > I still don't like the idea of using the DMA API itself. But, maybe we
    > need some common infrastructure that the DMA API and this code use which
    > says, "get me some pages that I can safely make shared".

    Right. For instance any KVM PV feature would require shared memory, and DMA API
    normally doesn't fit (taking 'struct kvm_steal_time' as example).

    Maybe we can reserve a CMA for this purpose.

    --
    Thanks,
    -Kai


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