Re: [PATCH] KVM: TDX: Set SIGNIFCANT_INDEX flag for supported CPUIDs

[Binbin Wu]

On 2/25/2026 12:03 AM, Sean Christopherson wrote:
> 
>>>> +	} else {
>>>> +		entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
>>>> +	}
>>>>  
>>>> +	WARN_ON_ONCE(cpuid_function_is_indexed(entry->function) !=
>>>> +		     !!(entry->flags &
>>>> KVM_CPUID_FLAG_SIGNIFCANT_INDEX));
>>>
>>> It warns on leaf 0x23 for me. Is it intentional?
>>
>> I guess because the list in cpuid_function_is_indexed() is hard-coded
>> and 0x23 is not added into the list yet.
> 
> Yeah, I was anticipating that we'd run afoul of leaves that aren't known to
> the kernel.  FWIW, it looks like 0x24 is also indexed.

0x24 is there already.