On Wed, Aug 25, 2021 at 02:37:42PM +0200, Christoph Hellwig wrote: > On Wed, Aug 25, 2021 at 09:34:54AM -0300, Jason Gunthorpe wrote: > > 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! > > Hmm, that is a full sentence for the comment that needs to be added. > Are you fine with just s/mediated/emulated/ for the symbol names or > do you want something more specific? I think so, in context of a group or iommu function it kind of makes sense emulated would refer to the page table/dma process The driver entry point can have the extra words vfio_register_emulated_dma_dev() Seems to read well? Jason
