On Wed, Feb 12, 2020 at 07:15:13AM +0000, Liu, Yi L wrote: [...] > While considering your suggestion on dropping one of the two abstract > layers. I came up a new proposal as below: > > We may drop the IOMMUContext in this series, and rename DualStageIOMMUObject > to HostIOMMUContext, which is per-vfio-container. Add an interface in PCI > layer(e.g. an callback in PCIDevice) to let vIOMMU get HostIOMMUContext. > I think this could cover the requirement of providing explicit method for > vIOMMU to call into VFIO and then program host IOMMU. > > While for the requirement of VFIO to vIOMMU callings (e.g. PRQ), I think it > could be done via PCI layer by adding an operation in PCIIOMMUOps. Thoughts? Hmm sounds good. :) The thing is for the calls to the other direction (e.g. VFIO injecting faults to vIOMMU), that's neither per-container nor per-device, but per-vIOMMU. PCIIOMMUOps suites for that job I'd say, which is per-vIOMMU. Let's see how it goes. -- Peter Xu
