Re: [PATCH 0/2] efivars: reading variables can generate SMIs

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> Would rate limiting (but not only for non-root) help mitigate Spectre
> v1 issues in UEFI runtime services code as well? I have been looking
> into unmapping the entire kernel while such calls are in progress,
> because firmware is likely to remain vulnerable long after the OSes
> have been fixed, and we may be able to kill two birds with one stone
> here (and not break userland in the process)

Yes a global rate limit would seem like a good compromise.

-Andi

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