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Is > there a way to avoid defaulting to identify mode when we are booting > into the "maintenance" mode? Maybe one could be created? It's tricky though because you also really want to block drivers from using the iommu if you don't know they are quieted and you can't do that without parsing the KHO data, which you can't do because it doesn't understand it.. IDK, I think the "maintenance" mode is something that is probably best effort and shouldn't be relied on. It will work if the iommu data is restored or other lucky conditions hit, so it is not useless, but it is certainly not robust or guaranteed. You are better to squirt a panic message out of the serial port and hope for the best I guess. Jason