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Re: "Meltdown" and "Spectre": Every modern processor has unfixable security flaws

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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

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“Meltdown” and  “Spectre”: Every modern processor has  unfixable security flaws Curt <curty@free.fr> - 2018-01-04 18:30 +0100
  Re: “Meltdown” and “Spectre”: Every modern processor has unfixable security flaws The Wanderer <wanderer@fastmail.fm> - 2018-01-04 18:40 +0100
  Re: “Meltdown” and “Spectre”: Every modern processor has unfixable security flaws Michael Fothergill <michael.fothergill@gmail.com> - 2018-01-04 18:50 +0100
    Re: “Meltdown” and “Spectre”: Every modern processor has unfixable security flaws The Wanderer <wanderer@fastmail.fm> - 2018-01-04 19:00 +0100
      Re: “Meltdown” and  “Spectre”: Every modern processor has  unfixable security flaws Tixy <tixy@yxit.co.uk> - 2018-01-04 19:20 +0100
        Re: “Meltdown” and “Spectre”: Every modern processor has unfixable security flaws The Wanderer <wanderer@fastmail.fm> - 2018-01-04 19:30 +0100
      Re: “Meltdown” and “Spectre”: Every modern processor has unfixable security flaws Michael Fothergill <michael.fothergill@gmail.com> - 2018-01-04 19:40 +0100
        Re: “Meltdown” and “Spectre”: Every modern processor has unfixable security flaws Nicholas Geovanis <nickgeovanis@gmail.com> - 2018-01-04 20:00 +0100
      Re: “Meltdown” and “Spectre”: Every modern processor has unfixable security flaws Jack Dangler <tdldev@gmail.com> - 2018-01-05 13:50 +0100
        Re: “Meltdown” and “Spectre”: Every modern processor has  unfixable security flaws <tomas@tuxteam.de> - 2018-01-05 14:00 +0100
          Re: "Meltdown" and "Spectre": Every modern processor has unfixable security flaws "Thomas Schmitt" <scdbackup@gmx.net> - 2018-01-05 14:50 +0100
            Re: "Meltdown" and "Spectre": Every modern processor has unfixable  security flaws <tomas@tuxteam.de> - 2018-01-05 15:40 +0100
              Re: "Meltdown" and "Spectre": Every modern processor has unfixable security flaws "Thomas Schmitt" <scdbackup@gmx.net> - 2018-01-05 16:50 +0100
                Re: "Meltdown" and "Spectre": Every modern processor has unfixable  security flaws <tomas@tuxteam.de> - 2018-01-05 17:10 +0100
                [OFFTOPIC] Re: "Meltdown" and "Spectre": Every modern processor has unfixable security flaws Stefan Monnier <monnier@iro.umontreal.ca> - 2018-01-05 19:10 +0100
                Re: [OFFTOPIC] Re: "Meltdown" and "Spectre": Every modern processor  has unfixable security flaws SDA <marathon.durandal@gmail.com> - 2018-01-08 02:40 +0100
                Re: [OFFTOPIC] Re: "Meltdown" and "Spectre": Every modern processor  has unfixable security flaws Curt <curty@free.fr> - 2018-01-08 11:30 +0100
                Re: [OFFTOPIC] Re: "Meltdown" and "Spectre": Every modern processor  has unfixable security flaws Tom Furie <tom@furie.org.uk> - 2018-01-08 13:10 +0100
          Re: “Meltdown” and “Spectre”: Every modern processor has unfixable security flaws Nicholas Geovanis <nickgeovanis@gmail.com> - 2018-01-05 17:40 +0100
            Re: “Meltdown” and “Spectre”: Every modern processor has  unfixable security flaws <tomas@tuxteam.de> - 2018-01-05 17:50 +0100
            [OFFTOPIC] Re: “Meltdown” and  “Spectre”: Every modern processor has unfixable  security flaws Stefan Monnier <monnier@iro.umontreal.ca> - 2018-01-05 19:10 +0100
  Re: “Meltdown” and “Spectre”: Every modern processor has unfixable security flaws francis picabia <fpicabia@gmail.com> - 2018-01-04 19:10 +0100
    Re: “Meltdown” and “Spectre”: Every modern processor has unfixable security flaws bw <bwtnguy@yahoo.com> - 2018-01-04 19:20 +0100
    Re: “Meltdown” and “Spectre”: Every modern processor has unfixable security flaws The Wanderer <wanderer@fastmail.fm> - 2018-01-04 19:20 +0100

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