On Wed, Oct 09, 2024 at 09:38:04AM -0700, Nicolin Chen wrote: > Add a new ioctl for user space to do a vIOMMU allocation. It must be based > on a nesting parent HWPT, so take its refcount. > > As an initial version, define an IOMMU_VIOMMU_TYPE_DEFAULT type. Using it, > the object will be allocated by the iommufd core. > > If an IOMMU driver supports a driver-managed vIOMMU object, it must define > its own IOMMU_VIOMMU_TYPE_ in the uAPI header and implement a viommu_alloc > op in its iommu_ops. > > Signed-off-by: Nicolin Chen <nicolinc@xxxxxxxxxx> > --- > drivers/iommu/iommufd/Makefile | 3 +- > drivers/iommu/iommufd/iommufd_private.h | 3 + > include/uapi/linux/iommufd.h | 40 +++++++++++ > drivers/iommu/iommufd/main.c | 6 ++ > drivers/iommu/iommufd/viommu.c | 91 +++++++++++++++++++++++++ > 5 files changed, 142 insertions(+), 1 deletion(-) > create mode 100644 drivers/iommu/iommufd/viommu.c Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx> Jason
