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SubjectRe: Bugs aren't features: X86_FEATURE_FXSAVE_LEAK
Andi Kleen wrote:
> "H. Peter Anvin" <hpa@zytor.com> writes:
>
>> The recent fix for the AMD FXSAVE information leak had a problematic
>> side effect. It introduced an entry in the x86 features vector which
>> is a bug, not a feature.
>
> It's a non issue because it affects all AMD CPUs (except K5/K6).
> You'll never find a system where only some CPUs have this problem.
>

It's still wrong architecturally, and we should have a sane way to deal with this as well
as other bugs. This isn't the only bug -- we're getting a decent-size collection of them
already -- and not all of them is going to have that particular property.

-hpa

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