Redefine the reference to PcdSystemMemoryBase in HighMemDxe.inf as a plain [Pcd] rather than [FixedPcd] (and fix up the code as appropriate). This allows us to align ArmVirtQemuKernel with ArmVirtQemu, given that the former uses a patchable PCD not a fixed PCD. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Laszlo Ersek <lersek@redhat.com>