On Wed, 6 Apr 2022 at 19:47, Ngan, Robert (DXC Luxoft) <[email protected]> wrote: > > Hmmm, you mention "speculative execution". Maybe that make it vulnerable to > meltdown/spectre type attacks.
Intel has had a similar scheme (TSX) for around 10 years. Any signs of their dropping it for lack of use...? Certainly they've encountered some problems related to its interaction with speculative execution, and each time their response seems to have been to disable TSX via microcode on all or certain processors. Wikipedia has some info on Intel's implementation at https://en.wikipedia.org/wiki/Transactional_Synchronization_Extensions It appears that, like the zArch implementation, Intel's requires programs to provide an alternative path around TSX. Tony H.
