Re: [PATCH v2 1/3] x86/cpuid: Mark CPUID function 0x23 as being indexed

[Xiaoyao Li]

On 10/23/2026 5:01 AM, Sean Christopherson wrote:
> Add function 0x23 to the set of CPUID functions that are indexed, as per
> the SDM and the many sub-leafs defined in leaf_types.h.
> 
> Reported-by: Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx>
> Closes: https://lore.kernel.org/all/213d614fe73e183a230c8f4e0c8fa1cc3d45df39.camel@xxxxxxxxx
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>

Reviewed-by: Xiaoyao Li <xiaoyao.li@xxxxxxxxx>

> ---
>  arch/x86/include/asm/cpuid/api.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/x86/include/asm/cpuid/api.h b/arch/x86/include/asm/cpuid/api.h
> index 82eddfa2347b..25b22b173f2a 100644
> --- a/arch/x86/include/asm/cpuid/api.h
> +++ b/arch/x86/include/asm/cpuid/api.h
> @@ -181,6 +181,7 @@ static __always_inline bool cpuid_function_is_indexed(u32 function)
>  	case 0x1d:
>  	case 0x1e:
>  	case 0x1f:
> +	case 0x23:
>  	case 0x24:
>  	case 0x8000001d:
>  		return true;