VIES_USER_FALLBACK
vie->status |= VIES_USER_FALLBACK;
vie->status |= VIES_USER_FALLBACK;
vie->status |= VIES_USER_FALLBACK;
if (vie->status & VIES_USER_FALLBACK) {
VIES_PENDING_MMIO | VIES_PENDING_INOUT | VIES_USER_FALLBACK;