This series brings the VFIO part of HW nested paging support in the SMMUv3. This is a rebase on top of Will's arm-smmu-updates branch (git://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git tags/arm-smmu-updates) This is basically a resend of v9 as patches still applied. This work has been stalled since Plumber 2019. Since then some users expressed interest in that work and tested v9: - https://patchwork.kernel.org/cover/11039995/#23012381 - https://patchwork.kernel.org/cover/11039995/#23197235 The series depends on: [PATCH v10 00/13] SMMUv3 Nested Stage Setup (IOMMU part) 3 new IOCTLs are introduced that allow the userspace to 1) pass the guest stage 1 configuration 2) pass stage 1 MSI bindings 3) invalidate stage 1 related caches They map onto the related new IOMMU API functions. We introduce the capability to register specific interrupt indexes (see [1]). A new DMA_FAULT interrupt index allows to register an eventfd to be signaled whenever a stage 1 related fault is detected at physical level. Also a specific region allows to expose the fault records to the user space. Best Regards Eric This series can be found at: https://github.com/eauger/linux/tree/will-arm-smmu-updates-2stage-v10 It series includes Tina's patch steming from [1] "[RFC PATCH v2 1/3] vfio: Use capability chains to handle device specific irq" plus patches originally contributed by Yi. History: v9 -> v10 - rebase on top of 5.6.0-rc3 (no change versus v9) v8 -> v9: - introduce specific irq framework - single fault region - iommu_unregister_device_fault_handler failure case not handled yet. 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 (8): vfio: VFIO_IOMMU_SET_MSI_BINDING vfio/pci: Add VFIO_REGION_TYPE_NESTED region type vfio/pci: Register an iommu fault handler vfio/pci: Allow to mmap the fault queue vfio: Add new IRQ for DMA fault reporting vfio/pci: Add framework for custom interrupt indices vfio/pci: Register and allow DMA FAULT IRQ signaling vfio: Document nested stage control Liu, Yi L (2): vfio: VFIO_IOMMU_SET_PASID_TABLE vfio: VFIO_IOMMU_CACHE_INVALIDATE Tina Zhang (1): vfio: Use capability chains to handle device specific irq Documentation/driver-api/vfio.rst | 77 ++++++++ drivers/vfio/pci/vfio_pci.c | 283 ++++++++++++++++++++++++++-- drivers/vfio/pci/vfio_pci_intrs.c | 62 ++++++ drivers/vfio/pci/vfio_pci_private.h | 24 +++ drivers/vfio/pci/vfio_pci_rdwr.c | 45 +++++ drivers/vfio/vfio_iommu_type1.c | 166 ++++++++++++++++ include/uapi/linux/vfio.h | 109 ++++++++++- 7 files changed, 747 insertions(+), 19 deletions(-) -- 2.20.1 _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
