> From: Jason Gunthorpe <jgg@xxxxxxxxxx> > Sent: Tuesday, November 8, 2022 8:49 AM > > Connect the IOAS to its IOCTL interface. This exposes most of the > functionality in the io_pagetable to userspace. > > This is intended to be the core of the generic interface that IOMMUFD will > provide. Every IOMMU driver should be able to implement an > iommu_domain > that is compatible with this generic mechanism. > > It is also designed to be easy to use for simple non virtual machine > monitor users, like DPDK: > - Universal simple support for all IOMMUs (no PPC special path) > - An IOVA allocator that considers the aperture and the allowed/reserved > ranges > - io_pagetable allows any number of iommu_domains to be connected to > the > IOAS > - Automatic allocation and re-use of iommu_domains > > Along with room in the design to add non-generic features to cater to > specific HW functionality. > > Tested-by: Nicolin Chen <nicolinc@xxxxxxxxxx> > Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx> > Signed-off-by: Nicolin Chen <nicolinc@xxxxxxxxxx> with kernel-doc warning fixed: Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
