On Mon, Sep 12, 2011 at 08:08:41AM -0400, Sethi Varun-B16395 wrote: > > The IOMMUs are usually devices on the bus itself, so they are initialized > > after the bus is set up and the devices on it are populated. So the > > function can not be called on bus initialization because the IOMMU is not > > ready at this point. > Well, at what point would the add_device_group (referring to patch set posted by Alex) call back be invoked? The details are up to Alex Williamson. One option is to register a notifier for the bus in the iommu_bus_init() function and react to its notifications. I think in the end we will have a number of additional call-backs in the iommu_ops which are called by the notifier (or from the driver-core directly) to handle actions like added or removed devices. All the infrastructure for that which is implemented in the iommu-drivers today will then be in the iommu-core code. Joerg -- AMD Operating System Research Center Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach General Managers: Alberto Bozzo, Andrew Bowd Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
