On Mon, Aug 02, 2010 at 04:29:38PM -0400, Zach Pfeffer wrote: > On Mon, Aug 02, 2010 at 09:58:02AM +0200, Roedel, Joerg wrote: > > In the means of the IOMMU-API the domain is the abstraction of an > > address space (in other words a page table). The IOMMU(s) which this domain > > is later assigned to are determined by the iommu_attach_device calls. > > I think the right way to go here is to create the concept of a > > device-context in the IOMMU-API and add functions like > > > > iommu_attach_context(struct iommu_domain *domain, > > struct iommu_context *ctxt); > > iommu_detach_context(struct iommu_context *ctxt); > > > > This would work if you can determine in your iommu-driver which iommu > > you need to program for which device. What do you think? > > > > Joerg, I'd like to make sure I understand this. A domain is an address > space separate from the actual page-tables that may be part of an > iommu_context, correct? After I iommu_attach_context the ctxt will > reflect the address space of the domain, correct? A domain is defined by a single page-table which can be modified using the iommu_map/iommu_unmap function calls. I am not completly sure what you mean by an iommu_context. Can you describe what it means in your context? 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 linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
