linux-kernel - RE: [PATCH Part2 v6 05/49] x86/sev: Add RMP entry lookup helpers

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Date:   Wed, 22 Jun 2022 14:22:48 +0000
From:   "Kalra, Ashish" <Ashish.Kalra@....com>
To:     Dave Hansen <dave.hansen@...el.com>,
        "x86@...nel.org" <x86@...nel.org>,
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Subject: RE: [PATCH Part2 v6 05/49] x86/sev: Add RMP entry lookup helpers

[AMD Official Use Only - General]

>> +/*
>> + * The RMP entry format is not architectural. The format is defined 
>> +in PPR
>> + * Family 19h Model 01h, Rev B1 processor.
>> + */

>Let's say that Family 20h comes out and has a new RMP entry format.
>What keeps an old kernel from attempting to use this old format on that new CPU?

As I replied previously on the same subject:
Architectural implies that it is defined in the APM and shouldn't change in such a way as to not be backward compatible. 
I probably think the wording here should be architecture independent or more precisely platform independent.

Thanks,
Ashish