Re: [PATCH v2 2/6] x86/cpu: Remove "nosep"

[Kees Cook]

On Thu, Jan 27, 2022 at 12:56:22PM +0100, Borislav Petkov wrote:
> From: Borislav Petkov <bp@xxxxxxx>
> 
> That chicken bit was added by
> 
>   4f88651125e2 ("[PATCH] i386: allow disabling X86_FEATURE_SEP at boot")
> 
> but measuring int80 vsyscall performance on 32-bit doesn't matter
> anymore.
> 
> If still needed, one can boot with
> 
>   clearcpuid=sep
> 
> to disable that feature for testing.
> 
> Signed-off-by: Borislav Petkov <bp@xxxxxxx>

Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>

-- 
Kees Cook