Re: "Meltdown" and "Spectre": Every modern processor has unfixable security flaws
Hi,
tomas@tuxteam.de wrote:
> 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).
http://gunkies.org/wiki/MC68010
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.
https://en.wikipedia.org/wiki/Motorola_68000_series
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.
https://support.google.com/faqs/answer/7625886
(I love the image of a hyperactive 7-year old child wrapped in a warehouse
of trampolines.)
Man against hardware. Who will finally win ?
Have a nice day :)
Thomas
Reply to: