> From: Jason Gunthorpe <j...@nvidia.com> > Sent: Tuesday, March 15, 2022 10:33 PM > > On Mon, Mar 14, 2022 at 10:07:07PM -0700, Jacob Pan wrote: > > + /* > > + * Each domain could have multiple devices attached with shared or > per > > + * device PASIDs. At the domain level, we keep track of unique PASIDs > and > > + * device user count. > > + * E.g. If a domain has two devices attached, device A has PASID 0, 1; > > + * device B has PASID 0, 2. Then the domain would have PASID 0, 1, 2. > > + */ > > A 2d array of xarray's seems like a poor data structure for this task.
besides that it also doesn't work when we support per-device PASID allocation in the future. In that case merging device PASIDs together is conceptually wrong. > > AFACIT this wants to store a list of (device, pasid) tuples, so a > simple linked list, 1d xarray vector or a red black tree seems more > appropriate.. > this tuple can well serve per-device PASID. 😊 Thanks Kevin _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
