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:A domain is defined by a single page-table which can be modified usingIn the means of the IOMMU-API the domain is the abstraction of anJoerg, I'd like to make sure I understand this. A domain is an address
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?
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?
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