Re: [RFC PATCH 0/15] x86: Remove support for TSC-less and CX8-less CPUs

[Arnd Bergmann]

On Fri, Apr 25, 2025, at 10:41, Ingo Molnar wrote:
> In the x86 architecture we have various complicated hardware emulation
> facilities on x86-32 to support ancient 32-bit CPUs that very very few
> people are using with modern kernels. This compatibility glue is sometimes
> even causing problems that people spend time to resolve, which time could
> be spent on other things.
>
> As Linus recently remarked:
>
>  > I really get the feeling that it's time to leave i486 support behind.
>  > There's zero real reason for anybody to waste one second of
>  > development effort on this kind of issue.
>
> This series increases minimum kernel support features to include TSC and
> CX8 (CMPXCHG8B) hardware support, which removes 486 (and derivatives) support
> and early-586 (and derivatives) support.

Looks all good to me, thanks for including my earlier feedback.

Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>