On Mon, Jan 24, 2022 at 03:11:02PM +0800, Lu Baolu wrote: > - int (*enable_nesting)(struct iommu_domain *domain);
Perhaps for another series, but enable_nesting looks like dead code too, AFAICT. Or at the very least I can't figure how out VFIO_TYPE1_NESTING_IOMMU is supposed to work, or find any implementation of it in userspace. 8 years after it was merged in commit f5c9ecebaf2a ("vfio/iommu_type1: add new VFIO_TYPE1_NESTING_IOMMU IOMMU type") The commit comment says 'which are nested with the existing translation installed by VFIO.' but it doesn't explain how the newly created domain knows what its parent nest is.. Lu, there is an implementation in the Intel driver here, is it usable at all? Jason _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu