Re: x86/apic: Drop useless CXL/CPX row from the TSC deadline errata table

[Sohil Mehta]

On 7/16/2025 9:08 AM, Andrew Cooper wrote:
> A microcode revision of 0 is guaranteed to exit apic_validate_deadline_timer()
> early, but a better way is with no row at all.
> 

Yeah, not having an entry is much better. "exit" can be a bit ambiguous.
Should we be slightly more precise?

A microcode revision of 0 is guaranteed to return true for
apic_validate_deadline_timer(), but a better way is with no row at all.

> No functional change.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> ---

Reviewed-by: Sohil Mehta <sohil.mehta@xxxxxxxxx>


> CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> CC: Ingo Molnar <mingo@xxxxxxxxxx>
> CC: Borislav Petkov <bp@xxxxxxxxx>
> CC: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
> CC: x86@xxxxxxxxxx
> CC: "H. Peter Anvin" <hpa@xxxxxxxxx>
> CC: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> CC: Sohil Mehta <sohil.mehta@xxxxxxxxx>
> CC: Yuntao Wang <yuntao.wang@xxxxxxxxx>
> CC: Zhang Rui <rui.zhang@xxxxxxxxx>
> CC: linux-kernel@xxxxxxxxxxxxxxx
> 
> Strictly speaking, this is:
> 
>   Fixes: 66abf2388331 ("x86/apic: Convert the TSC deadline timer matching to steppings macro")
> 
> but I really don't think it's interesting to backport.
>