Re: "Meltdown" and "Spectre": Every modern processor has unfixable security flaws
- Date: Fri, 05 Jan 2018 14:41:57 +0100
- From: "Thomas Schmitt" <scdbackup@xxxxxxx>
- Subject: Re: "Meltdown" and "Spectre": Every modern processor has unfixable security flaws
> Does any of the processors in the M68K family support VM?
They did since the early 1980s when i wondered what the advantage of an
68010 would be over an 68000 (with HP BASIC: none).
After all, early Sun, HP and Apollo Unix workstations were based on 680X0.
> Does any of the M68K family members prefetch speculatively?
The last one (68060) had Branch Prediction, which implies some kind of
speculative execution and data prefetching.
Good news: Google claims to have a software remedy against Spectre,
called the "Retpoline". It keeps the CPU speculator busy with harmless
things while vulnerable commands are executed. I guess we will see it soon
as compiler option.
(I love the image of a hyperactive 7-year old child wrapped in a warehouse
Man against hardware. Who will finally win ?
Have a nice day :)