The ISA doesn't matter very much. Meltdown is specifically Intel's fault. Spectre is, AFAIK, inherent to out-of-order execution. So the original ThunderX is n

The ISA doesn't matter very much. Meltdown is specifically Intel's fault. Spectre is, AFAIK, inherent to out-of-order execution. So the original ThunderX is not vulnerable, ThunderX 2 is.