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If not, why not? It can be added. Any of the features added to SNP_FEATURES_PRESENT that aren't set in the SNP_FEATURES_IMPL_REQ bitmap are really a no-op. The SNP_FEATURES_PRESENT bitmap is meant to contain whatever bits are set in SNP_FEATURES_IMPL_REQ when an implementation has been implemented for the guest. But, yeah, we could add all the bits that aren't set in SNP_FEATURES_IMPL_REQ to SNP_FEATURES_PRESENT if it makes it clearer. If we do that, it should probably be a separate patch (?) that also rewords the comment above SNP_FEATURES_PRESENT Thanks, Tom >