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?