Re: [PATCH v4 10/15] virt: sev-guest: Choose the VMPCK key based on executing VMPL

[Borislav Petkov]

On Fri, May 31, 2024 at 01:36:06PM -0500, Tom Lendacky wrote:
> The sev-guest driver needs to access it. Given it is a driver/module, I
> created the accessor rather than mark the variable EXPORT_SYMBOL_GPL(). Your
> call, I'm fine with either.

Yeah, if the variable doesn't change after init, then you don't really
need an accessor.

> Yes, the driver can and does figure it out. However, this module parameter
> was added in the off chance the default VMPCK gets wiped. Then you can
> reload the driver and use a different (less privileged) VMPCK.

Is that what the text over snp_disable_vmpck() is alluding to?

Or where are we documenting this intended use?

Thx.

-- 
Regards/Gruss,
    Boris.

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