> From: Lu Baolu <baolu...@linux.intel.com> > Sent: Sunday, April 10, 2022 6:25 PM > > Use below data structures for SVA implementation in the IOMMU core: > > - struct iommu_sva_ioas > Represent the I/O address space shared with an application CPU address > space. This structure has a 1:1 relationship with an mm_struct. It > graps a "mm->mm_count" refcount during creation and drop it on release. > > - struct iommu_domain (IOMMU_DOMAIN_SVA type) > Represent a hardware pagetable that the IOMMU hardware could use for > SVA translation. Multiple iommu domains could be bound with an SVA ioas > and each graps a refcount from ioas in order to make sure ioas could > only be freed after all domains have been unbound. > > - struct iommu_sva > Represent a bond relationship between an SVA ioas and an iommu domain. > If a bond already exists, it's reused and a reference is taken. > > Signed-off-by: Lu Baolu <baolu...@linux.intel.com>
This should be patch07. None of following patches touch those structures until hitting patch08. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
