Re: [PATCH RFC v9 07/51] x86/sev: Add the host SEV-SNP initialization support

Borislav Petkov
2023-06-21T09:16:40Z

On Mon, Jun 12, 2023 at 08:34:02AM -0700, Dave Hansen wrote:
> On 6/11/23 21:25, Michael Roth wrote:
> > + /*
> > + * Calculate the amount the memory that must be reserved by the BIOS to
> > + * address the whole RAM, including the bookkeeping area. The RMP itself
> > + * must also be covered.
> > + */
> > + max_rmp_pfn = max_pfn;
> > + if (PHYS_PFN(rmp_end) > max_pfn)
> > + max_rmp_pfn = PHYS_PFN(rmp_end);
>
> Could you say a little here about how this deals with memory hotplug?

Does SNP hw even support memory hotplug?

I think in order to support that, you'd need some special dance because
of the RMP table etc...

--
Regards/Gruss,
Boris.