Hi everybody,

These are the core IOMMU changes that I have posted previously as part
of my ongoing effort to reduce the lock contention of the SMMUv3 command
queue. I thought it would be better to split this out as a separate
series, since I think it's ready to go and all the driver conversions
mean that it's quite a pain for me to maintain out of tree!

The idea of the patch series is to allow TLB invalidation to be batched
up into a new 'struct iommu_iotlb_gather' structure, which tracks the
properties of the virtual address range being invalidated so that it
can be deferred until the driver's ->iotlb_sync() function is called.
This allows for more efficient invalidation on hardware that can submit
multiple invalidations in one go.

The previous series was included in:


The only real change since then is incorporating the newly merged
virtio-iommu driver.

If you'd like to play with the patches, then I've also pushed them here:


but they should behave as a no-op on their own. Patches to convert the
Arm SMMUv3 driver to the new API are here:





Cc: Jean-Philippe Brucker <jean-phili...@linaro.org>
Cc: Robin Murphy <robin.mur...@arm.com>
Cc: Jayachandran Chandrasekharan Nair <jn...@marvell.com>
Cc: Jan Glauber <jglau...@marvell.com>
Cc: Jon Masters <j...@redhat.com>
Cc: Eric Auger <eric.au...@redhat.com>
Cc: Zhen Lei <thunder.leiz...@huawei.com>
Cc: Jonathan Cameron <jonathan.came...@huawei.com>
Cc: Vijay Kilary <vkil...@codeaurora.org>
Cc: Joerg Roedel <j...@8bytes.org>
Cc: John Garry <john.ga...@huawei.com>
Cc: Alex Williamson <alex.william...@redhat.com>
Cc: Marek Szyprowski <m.szyprow...@samsung.com>
Cc: David Woodhouse <dw...@infradead.org>

Will Deacon (13):
  iommu: Remove empty iommu_tlb_range_add() callback from iommu_ops
  iommu/io-pgtable-arm: Remove redundant call to io_pgtable_tlb_sync()
  iommu/io-pgtable: Rename iommu_gather_ops to iommu_flush_ops
  iommu: Introduce struct iommu_iotlb_gather for batching TLB flushes
  iommu: Introduce iommu_iotlb_gather_add_page()
  iommu: Pass struct iommu_iotlb_gather to ->unmap() and ->iotlb_sync()
  iommu/io-pgtable: Introduce tlb_flush_walk() and tlb_flush_leaf()
  iommu/io-pgtable: Hook up ->tlb_flush_walk() and ->tlb_flush_leaf() in
  iommu/io-pgtable-arm: Call ->tlb_flush_walk() and ->tlb_flush_leaf()
  iommu/io-pgtable: Replace ->tlb_add_flush() with ->tlb_add_page()
  iommu/io-pgtable: Remove unused ->tlb_sync() callback
  iommu/io-pgtable: Pass struct iommu_iotlb_gather to ->unmap()
  iommu/io-pgtable: Pass struct iommu_iotlb_gather to ->tlb_add_page()

 drivers/gpu/drm/panfrost/panfrost_mmu.c |  24 +++++---
 drivers/iommu/amd_iommu.c               |  11 ++--
 drivers/iommu/arm-smmu-v3.c             |  52 +++++++++++-----
 drivers/iommu/arm-smmu.c                | 103 ++++++++++++++++++++++++--------
 drivers/iommu/dma-iommu.c               |   9 ++-
 drivers/iommu/exynos-iommu.c            |   3 +-
 drivers/iommu/intel-iommu.c             |   3 +-
 drivers/iommu/io-pgtable-arm-v7s.c      |  57 +++++++++---------
 drivers/iommu/io-pgtable-arm.c          |  48 ++++++++-------
 drivers/iommu/iommu.c                   |  24 ++++----
 drivers/iommu/ipmmu-vmsa.c              |  28 +++++----
 drivers/iommu/msm_iommu.c               |  42 +++++++++----
 drivers/iommu/mtk_iommu.c               |  45 +++++++++++---
 drivers/iommu/mtk_iommu_v1.c            |   3 +-
 drivers/iommu/omap-iommu.c              |   2 +-
 drivers/iommu/qcom_iommu.c              |  44 +++++++++++---
 drivers/iommu/rockchip-iommu.c          |   2 +-
 drivers/iommu/s390-iommu.c              |   3 +-
 drivers/iommu/tegra-gart.c              |  12 +++-
 drivers/iommu/tegra-smmu.c              |   2 +-
 drivers/iommu/virtio-iommu.c            |   5 +-
 drivers/vfio/vfio_iommu_type1.c         |  27 +++++----
 include/linux/io-pgtable.h              |  57 ++++++++++++------
 include/linux/iommu.h                   |  92 +++++++++++++++++++++-------
 24 files changed, 483 insertions(+), 215 deletions(-)


iommu mailing list

Reply via email to