Re: [PATCH] x86/virt/tdx: Formalize SEAMCALL version encoding support

[Dave Hansen]

On 7/6/26 14:44, Edgecombe, Rick P wrote:
>> Two alternative schemes were considered:
>>
>> 1. Define versioned macros like TDH_VP_INIT_V0, TDH_VP_INIT_V1, etc.
>>    However, this breaks naming consistency unless all existing stable
>>    function macros are changed to TDH_XXX_V0.
>>
>> 2. Add an explicit 'version' parameter to the base seamcall() API. This
>>    unnecessarily forces all stable SEAMCALL helpers to pass a
>>    meaningless '0' argument. Additionally, the magic '0' or '1' values
>>    at caller sites are not descriptive.
>>
> Dave was recently saying something to the effect of "make every word count". I
> think we could lose some filler words.

This can also just go below the --- so it doesn't make it to the final
changelog.

I like the discussion happening so far. I, too, dislike adding another
level of C wrappers. I'm looking forward to v2.