Re: [PATCH V2 01/10] x86/CPU: Expose if cache is inclusive of lower level caches

Borislav Petkov
2019-08-08T08:08:03Z

On Tue, Aug 06, 2019 at 02:16:10PM -0700, Reinette Chatre wrote:
> > I'd leave it to tglx to say how we should mirror cache inclusivity in
> > cpuinfo_x86: whether a synthetic X86_FEATURE bit or cache the respective
> > CPUID words which state whether L2/L3 is inclusive...
>
> Thank you very much. I appreciate your guidance here.

Ok, tglx and I talked it over a bit on IRC: so your 1/10 patch is pretty
close - just leave out the generic struct cacheinfo bits and put the
cache inclusivity property in a static variable there. It will be a
single bit of information only anyway, as this is system-wide and we can
always move it to generic code when some other arch wants it too.

Thx.

--
Regards/Gruss,
Boris.

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