"It may be that the only true solution is to replace / re-engineer CPUs with these vulnerabilities expressly in mind, and guarded against. " No such way that a

"It may be that the only true solution is to replace / re-engineer CPUs with these vulnerabilities expressly in mind, and guarded against. " No such way that anyone knows about exists without huge performance loss. Without changing existing software/programming/etc paradigms, it is, IMHO, quite unlikely such a way exists.