Re: [PATCH] [RFC] x86/cpu: rework instruction set selection

["H. Peter Anvin" <hpa@xxxxxxxxx>]

On April 25, 2025 9:13:31 AM PDT, Arnd Bergmann <arnd@xxxxxxxx> wrote:
>On Fri, Apr 25, 2025, at 17:34, H. Peter Anvin wrote:
>> On April 25, 2025 7:15:15 AM PDT, Arnd Bergmann <arnd@xxxxxxxxxx> wrote:
>>
>> I really don't like testing an unrelated feature (CMOV for PAE); 
>
>How about a new symbol with the opposite polarity, e.g. CONFIG_CPU_586?
>In that case, X86_HAVE_PAE and X86_CMOV could both depend on that
>not being set.
>
>I only picked the X86_CMOV symbol because it already exists in .config
>files, but that is not the important bit here.
>
>> furthermore, at least some old hypervisors were known to have
>> broken PAE.
>
>I'm not following. What does that have to do with my patch?
>
>     Arnd

This seems overly complex to me.