RE: [PATCH Part2 v6 06/49] x86/sev: Add helper functions for RMPUPDATE and PSMASH instruction
From: Kalra, Ashish
Date: Mon Aug 01 2022 - 19:32:33 EST
[AMD Official Use Only - General]
Hello Boris,
>> Yes, I will be adding a check for CPU family/model as following :
>Why if the PPR is already kinda spelling the already architectural pieces of the RMP entry?
>"In order to assist software" it says.
The PPR specifies select portions of the RMP entry format for a specific core/platform.
Therefore, the complete struct rmpentry definition is non-architectural.
As per PPR, software should not rely on any field definitions not specified
in this table and the format of an RMP entry may change in future processors.
>So you call the specified ones by their name and the rest is __rsvd.
>No need for model checks at all.
>Right?
But we can't use this struct on a core/platform which has a different layout, so aren't
the model checks required ?
Thanks,
Ashish