This series brings the IOMMU part of HW nested paging support in the SMMUv3. The VFIO part is submitted separately. The IOMMU API is extended to support 3 new API functionalities: 1) pass the guest stage 1 configuration 2) pass stage 1 MSI bindings 3) invalidate stage 1 related caches 3) is also used for SVA use case [1]. Then those capabilities gets implemented in the SMMUv3 driver. The virtualizer passes information through the VFIO user API which cascades them to the iommu subsystem. This allows the guest to own stage 1 tables and context descriptors (so-called PASID table) while the host owns stage 2 tables and main configuration structures (STE). Best Regards Eric This series can be found at: https://github.com/eauger/linux/tree/v5.3.0-rc0-2stage-v9 References: [1] [PATCH v4 00/22] Shared virtual address IOMMU and VT-d support History: v8 -> v9: - rebase on 5.3 - split iommu/vfio parts v6 -> v8: - Implement VFIO-PCI device specific interrupt framework v7 -> v8: - rebase on top of v5.2-rc1 and especially 8be39a1a04c1 iommu/arm-smmu-v3: Add a master->domain pointer - dynamic alloc of s1_cfg/s2_cfg - __arm_smmu_tlb_inv_asid/s1_range_nosync - check there is no HW MSI regions - asid invalidation using pasid extended struct (change in the uapi) - add s1_live/s2_live checks - move check about support of nested stages in domain finalise - fixes in error reporting according to the discussion with Robin - reordered the patches to have first iommu/smmuv3 patches and then VFIO patches v6 -> v7: - removed device handle from bind/unbind_guest_msi - added "iommu/smmuv3: Nested mode single MSI doorbell per domain enforcement" - added few uapi comments as suggested by Jean, Jacop and Alex v5 -> v6: - Fix compilation issue when CONFIG_IOMMU_API is unset v4 -> v5: - fix bug reported by Vincent: fault handler unregistration now happens in vfio_pci_release - IOMMU_FAULT_PERM_* moved outside of struct definition + small uapi changes suggested by Kean-Philippe (except fetch_addr) - iommu: introduce device fault report API: removed the PRI part. - see individual logs for more details - reset the ste abort flag on detach v3 -> v4: - took into account Alex, jean-Philippe and Robin's comments on v3 - rework of the smmuv3 driver integration - add tear down ops for msi binding and PASID table binding - fix S1 fault propagation - put fault reporting patches at the beginning of the series following Jean-Philippe's request - update of the cache invalidate and fault API uapis - VFIO fault reporting rework with 2 separate regions and one mmappable segment for the fault queue - moved to PATCH v2 -> v3: - When registering the S1 MSI binding we now store the device handle. This addresses Robin's comment about discimination of devices beonging to different S1 groups and using different physical MSI doorbells. - Change the fault reporting API: use VFIO_PCI_DMA_FAULT_IRQ_INDEX to set the eventfd and expose the faults through an mmappable fault region v1 -> v2: - Added the fault reporting capability - asid properly passed on invalidation (fix assignment of multiple devices) - see individual change logs for more info Eric Auger (11): iommu: Introduce bind/unbind_guest_msi iommu/smmuv3: Dynamically allocate s1_cfg and s2_cfg iommu/smmuv3: Get prepared for nested stage support iommu/smmuv3: Implement attach/detach_pasid_table iommu/smmuv3: Introduce __arm_smmu_tlb_inv_asid/s1_range_nosync iommu/smmuv3: Implement cache_invalidate dma-iommu: Implement NESTED_MSI cookie iommu/smmuv3: Nested mode single MSI doorbell per domain enforcement iommu/smmuv3: Enforce incompatibility between nested mode and HW MSI regions iommu/smmuv3: Implement bind/unbind_guest_msi iommu/smmuv3: Report non recoverable faults Jacob Pan (1): iommu: Introduce attach/detach_pasid_table API Jean-Philippe Brucker (1): iommu/arm-smmu-v3: Maintain a SID->device structure Yi L Liu (1): iommu: Introduce cache_invalidate API drivers/iommu/arm-smmu-v3.c | 817 ++++++++++++++++++++++++++++++++---- drivers/iommu/dma-iommu.c | 139 +++++- drivers/iommu/iommu.c | 66 +++ include/linux/dma-iommu.h | 16 + include/linux/iommu.h | 52 +++ include/uapi/linux/iommu.h | 161 +++++++ 6 files changed, 1162 insertions(+), 89 deletions(-) -- 2.20.1
