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SubjectRe: [PATCH 04/11] x86/fpu: eager switch PKRU state
On 10/12/2018 11:09 AM, Andy Lutomirski wrote:
> But maybe WRPKRU is more expensive than RDPKRU and a branch?

Yeah, it is more expensive. It has a higher cycle cost and it's also
practically a (light) speculation barrier.

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