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From: Lu Baolu <baolu.lu@linux.intel.com>
To: Joerg Roedel <joro@8bytes.org>, Jason Gunthorpe <jgg@nvidia.com>,
	Christoph Hellwig <hch@infradead.org>,
	Kevin Tian <kevin.tian@intel.com>,
	Ashok Raj <ashok.raj@intel.com>, Will Deacon <will@kernel.org>,
	Robin Murphy <robin.murphy@arm.com>,
	Jean-Philippe Brucker <jean-philippe@linaro.com>
Cc: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
	Jacob jun Pan <jacob.jun.pan@intel.com>
Subject: [PATCH v4 00/12] iommu: SVA and IOPF refactoring
Date: Thu, 21 Apr 2022 13:21:09 +0800	[thread overview]
Message-ID: <20220421052121.3464100-1-baolu.lu@linux.intel.com> (raw)

Hi folks,

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 has been functionally tested on an x86 machine and compile
tested for other architectures. 

This series is also available on github:
[2] https://github.com/LuBaolu/intel-iommu/commits/iommu-sva-refactoring-v4

Please review and suggest.

Best regards,
baolu

Change log:
v4:
 - Solve the overlap with another series and make this series
   self-contained.
 - No objection to the abstraction of data structure during v3 review.
   Hence remove the RFC subject prefix.
 - Refine the immutable singleton group code according to Kevin's
   comments.

v3:
 - https://lore.kernel.org/linux-iommu/20220410102443.294128-1-baolu.lu@linux.intel.com/
 - Rework iommu_group_singleton_lockdown() by adding a flag to the group
   that positively indicates the group can never have more than one
   member, even after hot plug.
 - Abstract the data structs used for iommu sva in a separated patches to
   make it easier for review.
 - I still keep the RFC prefix in this series as above two significant
   changes need at least another round review to be finalized.
 - Several misc refinements.

v2:
 - https://lore.kernel.org/linux-iommu/20220329053800.3049561-1-baolu.lu@linux.intel.com/
 - Add sva domain life cycle management to avoid race between unbind and
   page fault handling.
 - Use a single domain for each mm.
 - Return a single sva handler for the same binding.
 - Add a new helper to meet singleton group requirement.
 - Rework the SVA domain allocation for arm smmu v3 driver and move the
   pasid_bit initialization to device probe.
 - Drop the patch "iommu: Handle IO page faults directly".
 - Add mmget_not_zero(mm) in SVA page fault handler.

v1:
 - https://lore.kernel.org/linux-iommu/20220320064030.2936936-1-baolu.lu@linux.intel.com/
 - Initial post.

Dave Jiang (1):
  dmaengine: idxd: Separate user and kernel pasid enabling

Lu Baolu (11):
  iommu: Add pasid_bits field in struct dev_iommu
  iommu: Add attach/detach_dev_pasid domain ops
  iommu/sva: Basic data structures for SVA
  iommu/vt-d: Remove SVM_FLAG_SUPERVISOR_MODE support
  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: Prepare IOMMU domain for IOPF
  iommu: Per-domain I/O page fault handling
  iommu: Rename iommu-sva-lib.{c,h}

 include/linux/intel-iommu.h                   |   5 +-
 include/linux/iommu.h                         | 106 ++++--
 drivers/dma/idxd/idxd.h                       |   6 +
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h   |  25 +-
 .../iommu/{iommu-sva-lib.h => iommu-sva.h}    |   8 +-
 drivers/dma/idxd/cdev.c                       |   4 +-
 drivers/dma/idxd/init.c                       |  30 +-
 .../iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c   |  85 ++---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c   |  28 +-
 drivers/iommu/intel/iommu.c                   |  20 +-
 drivers/iommu/intel/svm.c                     | 135 +++----
 drivers/iommu/io-pgfault.c                    |  71 +---
 drivers/iommu/iommu-sva-lib.c                 |  71 ----
 drivers/iommu/iommu-sva.c                     | 331 ++++++++++++++++++
 drivers/iommu/iommu.c                         | 219 +++++++-----
 drivers/iommu/Makefile                        |   2 +-
 16 files changed, 721 insertions(+), 425 deletions(-)
 rename drivers/iommu/{iommu-sva-lib.h => iommu-sva.h} (88%)
 delete mode 100644 drivers/iommu/iommu-sva-lib.c
 create mode 100644 drivers/iommu/iommu-sva.c

-- 
2.25.1

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             reply	other threads:[~2022-04-21  5:24 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-21  5:21 Lu Baolu [this message]
2022-04-21  5:21 ` [PATCH v4 01/12] dmaengine: idxd: Separate user and kernel pasid enabling Lu Baolu
2022-04-21  5:21 ` [PATCH v4 02/12] iommu: Add pasid_bits field in struct dev_iommu Lu Baolu
2022-04-21  5:21 ` [PATCH v4 03/12] iommu: Add attach/detach_dev_pasid domain ops Lu Baolu
2022-04-28 14:53   ` Jean-Philippe Brucker
2022-04-29  6:27     ` Baolu Lu
2022-04-21  5:21 ` [PATCH v4 04/12] iommu/sva: Basic data structures for SVA Lu Baolu
2022-04-21  5:21 ` [PATCH v4 05/12] iommu/vt-d: Remove SVM_FLAG_SUPERVISOR_MODE support Lu Baolu
2022-04-21  5:21 ` [PATCH v4 06/12] iommu/vt-d: Add SVA domain support Lu Baolu
2022-04-21  5:21 ` [PATCH v4 07/12] arm-smmu-v3/sva: " Lu Baolu
2022-04-21  5:21 ` [PATCH v4 08/12] iommu/sva: Use attach/detach_pasid_dev in SVA interfaces Lu Baolu
2022-04-21  5:21 ` [PATCH v4 09/12] iommu: Remove SVA related callbacks from iommu ops Lu Baolu
2022-04-21  5:21 ` [PATCH v4 10/12] iommu: Prepare IOMMU domain for IOPF Lu Baolu
2022-04-28 14:47   ` Jean-Philippe Brucker
2022-04-29  6:17     ` Baolu Lu
2022-04-21  5:21 ` [PATCH v4 11/12] iommu: Per-domain I/O page fault handling Lu Baolu
2022-04-28 14:57   ` Jean-Philippe Brucker
2022-04-29  6:35     ` Baolu Lu
2022-04-21  5:21 ` [PATCH v4 12/12] iommu: Rename iommu-sva-lib.{c,h} Lu Baolu

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