On Tue, 2019-06-25 at 01:44 +0000, Ni, Ray wrote:
> Can EfiBootManagerRegisterBootDescriptionHandler() be used to extend the support for VirtIO
> in PlatformBootManagerLib?

Potentially.... although those are handled differently and not prefixed
with "UEFI " (or "Legacy " after my patch series). It looked like they
weren't for block devices, but other special targets.