Re: [PATCH v4 1/1] x86/cpufeatures: Implement Predictive Store Forwarding control.

Borislav Petkov
2021-04-30T19:57:17Z

On Fri, Apr 30, 2021 at 12:42:46PM -0700, Reiji Watanabe wrote:
> Then, it would be a problem if its guests want to use PSFD looking at
> x86_virt_spec_ctrl().

Well, will they want to do that? If so, why? Use case?

We decided to do this lite version to give people the opportunity to
evaluate whether there's a need to make full-blown mitigation-like,
per-thread thing like the rest of the mitigations in bugs.c or leave it
to be a chicken-bit thing.

So do you have any particular use case in mind or are you simply poking
holes in this?

--
Regards/Gruss,
Boris.