On Fri, Oct 18, 2013 at 09:13:11PM +0100, Andreas Herrmann wrote: > At the moment just handle BUS_NOTIFY_BIND_DRIVER to conditionally > isolate all master devices for an SMMU. > > Depending on DT information each device is put into its own protection > domain (if possible). For configuration with one or just a few > masters per SMMU that is easy to achieve. > > In case of many devices per SMMU (e.g. MMU-500 with it's distributed > translation support) isolation of each device might not be possible -- > depending on number of available SMR groups and/or context banks. > > Default is that device isolation is contolled per SMMU with SMMU node > property "arm,smmu-isolate-devices" in a DT. If this property is set > for an SMMU node, device isolation is performed. > > W/o device isolation the driver detects SMMUs but no translation is > configured (transactions just bypass translation process). > > Note that for device isolation dma_base and size are fixed as 0 and > SZ_128M at the moment.
I still think we need to solve the base/size issue before these can be merged (the option parsing code in patch 1 looks fine). Maybe we could it all on demand by registering a fault handler with an empty IOMMU domain? Will _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
