linux-kernel - Re: [PATCH Part2 v6 06/49] x86/sev: Add helper functions for RMPUPDATE and PSMASH instruction

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Date:   Tue, 2 Aug 2022 16:14:45 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     "Kalra, Ashish" <Ashish.Kalra@....com>
Cc:     "Dr. David Alan Gilbert" <dgilbert@...hat.com>,
        "x86@...nel.org" <x86@...nel.org>,
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Subject: Re: [PATCH Part2 v6 06/49] x86/sev: Add helper functions for
 RMPUPDATE and PSMASH instruction

On Mon, Aug 01, 2022 at 11:32:21PM +0000, Kalra, Ashish wrote:
> But we can't use this struct on a core/platform which has a different
> layout, so aren't the model checks required ?

That would be a problem only if the already specified fields move or get
resized.

If their offset and size don't change, you're good.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette