On 01/09/18 03:23, Xu Zaibo wrote: > As one application takes a whole function while using VFIO-PCI, why do > the application and the > function need to enable PASID capability? (Since just one I/O page table > is enough for them.) At the moment the series doesn't provide support for SVA without PASID (on the I/O page fault path, 08/40). In addition the BIND ioctl could be used by the owner application to bind other processes (slaves) and perform sub-assignment. But that feature is incomplete because we don't send stop_pasid notification to the owner when a slave dies. Thanks, Jean