On 5/7/21 9:52 AM, Paolo Bonzini wrote: > This can be optimized as well, can't it? This means that the only case > that needs the rdpkru is in switch_fpu_finish, and __write_pkru can be > removed completely: > > - do the rdpkru+wrpkru in switch_fpu_finish > > - just use wrpkru in KVM I was going to suggest exactly the same thing. It doesn't require the compiler to be smart, and wrpkru() is available in the same header as __write_pkru(). I also detest the mysterious true/false arguments to functions where you have no clue what they're doing at the call site without comments.
