On Tue, Mar 06, 2018 at 05:52:44AM -0800, Dave Hansen wrote: > 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.
Yes, allocation/freeing and KeyID interfaces can be tested with MKTME support in hardware. I did most of my testing this way. > 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. I will benchmark this. But not right now. -- Kirill A. Shutemov
