New x86 micro-op vulnerability breaks all known Spectre defenses
A close reading of the paper “I see dead uOps” would seem to indicate that Intel’s static thread partitioning of their micro-op cache would confer some inherent protection against uOp cache information leakage between threads - as compared to AMD’s dynamic thread partitioning scheme which could theoretically allow threads to spy on each other using the described techniques.If true, wouldn’t this also imply that an Intel Skylake CPU mitigates against such attempted attacks by one user against another in a shared CPU/ISP/cloud environment, whereas an AMD CPU theoretically would not?  If true, this would be a key point that the authors failed to mention in their concluding remarks.Anyone else read it this way? Or am I missing something?