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That seems to require a much more sophisticated attack. Also my point is that a speculative cache would be a separate (like a peer to L1) cache, only showing i
by lallysingh 8y ago
That seems to require a much more sophisticated attack. Also my point is that a speculative cache would be a separate (like a peer to L1) cache, only showing its side effects in L2/3. That'd be a bit harder to crack with the shared core noise and larger size.
- simcop2387 8y agoThe problem with that is, what happens when your speculative code changed values in that region of memory that another core just wrote to. who wins? and how do you do it without now violating a bunch of other problems where one core sets up a memory fence and other things like that. It ends up incredibly complicated to decide what to do with the result that it's probably not worth the extra work.
- lallysingh 8y agoWhy not ask the folks who did TSX?