linux-kernel - [PATCH RFC 00/11] iommu: SVA and IOPF refactoring

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Date:   Sun, 20 Mar 2022 14:40:19 +0800
From:   Lu Baolu <baolu.lu@...ux.intel.com>
To:     Joerg Roedel <joro@...tes.org>, Jason Gunthorpe <jgg@...dia.com>,
        Christoph Hellwig <hch@...radead.org>,
        Kevin Tian <kevin.tian@...el.com>,
        Ashok Raj <ashok.raj@...el.com>, Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Jean-Philippe Brucker <jean-philippe@...aro.com>
Cc:     Eric Auger <eric.auger@...hat.com>, Liu Yi L <yi.l.liu@...el.com>,
        Jacob jun Pan <jacob.jun.pan@...el.com>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        Lu Baolu <baolu.lu@...ux.intel.com>
Subject: [PATCH RFC 00/11] iommu: SVA and IOPF refactoring

Hi,

The former part of this series refactors the IOMMU SVA code by assigning
an SVA type of iommu_domain to a shared virtual address and replacing
sva_bind/unbind iommu ops with attach/detach_dev_pasid domain ops.

The latter part changes the existing I/O page fault handling framework
from only serving SVA to a generic one. Any driver or component could
handle the I/O page faults for its domain in its own way by installing
an I/O page fault handler.

This series overlaps with another series posted here [1]. For the
convenience of review, I included all relevant patches in this series.
We will solve the overlap problem later.

This series is also available on github here [2].

[1] https://lore.kernel.org/lkml/20220315050713.2000518-1-jacob.jun.pan@linux.intel.com/
[2] https://github.com/LuBaolu/intel-iommu/commits/iommu-sva-refactoring-v1

Please help review and suggest.

Best regards,
baolu

Lu Baolu (11):
  iommu: Add pasid_bits field in struct dev_iommu
  iommu: Add iommu_domain type for SVA
  iommu: Add attach/detach_dev_pasid domain ops
  iommu/vt-d: Add SVA domain support
  arm-smmu-v3/sva: Add SVA domain support
  iommu/sva: Use attach/detach_pasid_dev in SVA interfaces
  iommu: Remove SVA related callbacks from iommu ops
  iommu: Handle IO page faults directly
  iommu: Add iommu_get_domain_for_dev_pasid()
  iommu: Make IOPF handling framework generic
  iommu: Rename iommu-sva-lib.{c,h}

 include/linux/intel-iommu.h                   |   5 +-
 include/linux/iommu.h                         |  95 +++++---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h   |  25 +-
 .../iommu/{iommu-sva-lib.h => iommu-sva.h}    |   0
 .../iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c   |  96 ++++----
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c   |  19 +-
 drivers/iommu/intel/iommu.c                   |  36 +--
 drivers/iommu/intel/svm.c                     |  85 +++----
 drivers/iommu/io-pgfault.c                    |  69 +-----
 drivers/iommu/iommu-sva-lib.c                 |  71 ------
 drivers/iommu/iommu-sva.c                     | 230 ++++++++++++++++++
 drivers/iommu/iommu.c                         | 175 ++++++-------
 drivers/iommu/Makefile                        |   2 +-
 13 files changed, 515 insertions(+), 393 deletions(-)
 rename drivers/iommu/{iommu-sva-lib.h => iommu-sva.h} (100%)
 delete mode 100644 drivers/iommu/iommu-sva-lib.c
 create mode 100644 drivers/iommu/iommu-sva.c

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