> From: Lu Baolu <[email protected]> > Sent: Wednesday, April 15, 2020 1:26 PM > > When a PASID is stopped or terminated, there can be pending PRQs > (requests that haven't received responses) in the software and > remapping hardware. The pending page requests must be drained > so that the pasid could be reused. The register level interface > for page request draining is defined in 7.11 of the VT-d spec. > This series adds the support for page requests draining.
7.11 doesn't include register-level interface. It just talks about the general requirements on system software, endpoint device and its driver. Thanks Kevin > > This includes two parts: > - PATCH 1/7 ~ 3/7: refactor the qi_submit_sync() to support > multiple descriptors per submission which will be used by > PATCH 6/7. > - PATCH 4/7 ~ 7/7: add page request drain support after a > pasid entry is torn down due to an unbind operation. > > Please help to review. > > Best regards, > baolu > > Change log: > v1->v2: > - Fix race between multiple prq handling threads > > Lu Baolu (7): > iommu/vt-d: Refactor parameters for qi_submit_sync() > iommu/vt-d: Multiple descriptors per qi_submit_sync() > iommu/vt-d: debugfs: Add support to show inv queue internals > iommu/vt-d: Refactor prq_event_thread() > iommu/vt-d: Save prq descriptors in an internal list > iommu/vt-d: Add page request draining support > iommu/vt-d: Remove redundant IOTLB flush > > drivers/iommu/dmar.c | 63 +++-- > drivers/iommu/intel-iommu-debugfs.c | 62 +++++ > drivers/iommu/intel-pasid.c | 4 +- > drivers/iommu/intel-svm.c | 383 ++++++++++++++++++---------- > drivers/iommu/intel_irq_remapping.c | 2 +- > include/linux/intel-iommu.h | 12 +- > 6 files changed, 369 insertions(+), 157 deletions(-) > > -- > 2.17.1 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
