The "Retbleed" speculative execution vulnerabilities

The first few models are in-order; it's Pentium 1 logic on 2010 silicon with hyperthreading slapped on to compensate for the complete lack of superscalar ability. `lscpu` does in fact print "Not affected" down the board for them and the Spectre test programs fail too.

Later Atoms are more or less Celerons, they changed focus to network appliances after the initial goal of "sandbag ARM out of the mainstream market" failed.