> The best thing to do is probably to wait for for kvm_vcpu_map() to be eliminated,
> as described in the changelogs for commits:
>
> 357a18ad230f ("KVM: Kill kvm_map_gfn() / kvm_unmap_gfn() and gfn_to_pfn_cache")
> 7e2175ebd695 ("KVM: x86: Fix recording of guest steal time / preempted status")
>
> Once that is done, everything in KVM will either access guest memory through the
> userspace hva, or via a mechanism that is tied into the mmu_notifier, at which
> point accessing non-refcounted struct pages is safe and just needs to worry about
> not corrupting _refcount.
That does sound like the best approach. I'll put this patch series on
hold until that work is done.
