On 03/06/2018 12:54 AM, Kirill A. Shutemov wrote: >> Have you measured how slow this is? > No, I have not.
It would be handy to do this. I *think* you can do it on normal hardware, even if it does not have "real" support for memory encryption. Just don't set the encryption bits in the PTEs but go through all the motions of cache flushing. I think that will help tell us whether this is a really specialized thing a la hugetlbfs or whether it's something we really want to support as a first-class citizen in the VM.
