On Wed, Feb 08, 2023 at 08:16:36PM -0800, Yi Liu wrote: > iommufd gives userspace the capabilty to manipulating iommu subsytem. > e.g. DMA map/unmap etc. In the near future, it will also support iommu > nested translation. Different platform vendors have different implementation > for the nested translation. So before set up nested translation, userspace > needs to know the hardware iommu capabilities. For example, Intel platform > supports guest I/O page table to be the first stage translation structure. > > This series reports the iommu capability for a given iommufd_device which > has been bound to iommufd. It is a preparation work for nested translation > support[1]. In this series, Intel VT-d capability reporting is added. Other > vendors may add their own reporting based on this series. > > [1] https://github.com/yiliu1765/iommufd/tree/iommufd_nesting_vtd_v1 Let's have the comments addressed and this rebased on top of https://github.com/jgunthorpe/linux/commits/iommufd_hwpt Which should address eg the selftest issue I want to start chipping away at bits of the nesting patch pile and this part looks close Thanks, Jason
