On Wed, Aug 25, 2021 at 02:24:00PM +0200, Christoph Hellwig wrote: > On Wed, Aug 25, 2021 at 09:21:44AM -0300, Jason Gunthorpe wrote: > > This feature is about creating a device that is not connected to a HW > > IO page table (at least by the VFIO iommu code) but the IO page table > > is held in software and accessed by the VFIO driver through the pin > > API. > > > > virtual_iommu is somewhat overloaded with the idea of a vIOMMU created > > by qemu and stuffed into a guest.. > > > > "domainless" might work but I also find it confusing that the iommu > > code uses the word domain to refer to a HW IO page table :\ > > > > Maybe "sw io page table" ? > > Or simply emulated? At least looking at i915 there is very little > direct connection to the actual hardware, and while I don't understand > them fully the s390 driver look similar. And the samples are completely > faked up anyway. Emulated IO page table works for me! Jason
