[$] Memory encryption issues

"People think that memory encryption sounds really cool; it will make mysystem more secure so I want it". At least, that is how Dave Hansencharacterized the situation at the beginning of a session on the topicduring the memory-management track at the 2019 Linux Storage, Filesystem,and Memory-Management Summit. This session, also led by Kirill Shutemov,covered a number of aspects of the memory-encryption problem on Intelprocessors and beyond. One clear outcome of the discussion was also raisedby Hansen at the beginning: users of memory encryption need to think hardabout where that extra security is actually coming from.