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: https://lkml.kernel.org/r/20190711171927.28803-1-w...@kernel.org 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: https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git/log/?h=iommu/unmap but they should behave as a no-op on their own. Patches to convert the Arm SMMUv3 driver to the new API are here: https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git/log/?h=iommu/cmdq Cheers, Will --->8 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 drivers 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(-) -- 2.11.0 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
