On Thu, Jul 20, 2017 at 10:02:33AM +0530, Anup Patel wrote: > Not allowing No-IOMMU mode for devices already having > iommu_ops on their bus is very conservative. > > We now have IOMMU (such as ARM SMMU) which can bypass > transcations when IOMMU is not configured for a given > device. In addition, it is not necessary to have all > devices on bus to be upstream to an IOMMU on that bus. How does the SMMU know to bypass in these cases? As I explained before, the driver-specific command line option is the wrong way to go about arranging this. Will
