Messages in this thread | | | Date | Wed, 18 Nov 2020 09:58:49 +0100 | From | Mathieu Chouquet-Stringer <> | Subject | Re: [PATCH -v2.1] x86/msr: Filter MSR writes |
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On Tue, Nov 17, 2020 at 10:20:16PM +0100, Borislav Petkov wrote: > Not for long: > > https://git.kernel.org/tip/fe0a5788624c8b8f113a35bbe4636e37f9321241
That's fantastic.
> Because if you poke at random MSRs and you manage to "configure" your > CPU to run "out of spec" - this is what the taint flag is called: > TAINT_CPU_OUT_OF_SPEC - then this is exactly the case you've created: a > CPU executing outside of specifications.
Don't get me wrong, it makes total sense to do that, it's just the original reason of !SMP-capable isn't so clear while CPU out of spec is.
-- Mathieu Chouquet-Stringer me@mathieu.digital The sun itself sees not till heaven clears. -- William Shakespeare --
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