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.
- Re: [PATCH 04/11] x86/fpu: eager switch PKRU state Dave Hansen
- Re: [PATCH 04/11] x86/fpu: eager switch PKRU state Andy Lutomirski
- Re: [PATCH 04/11] x86/fpu: eager switch PKRU stat... Dave Hansen
