Following Robin's series [1], addressing MSI IOMMU mapping for devices attached to a DMA ops domain, quite a lot of changes (and simplifications) were induced with respect to the v12 iteration:
- msi-iommu API role now is handled at dma-iommu level - MSI doorbell registration API still is used for security assessment and doorbell overall iommu page size computation. - MSI layer part II is not needed anymore since mapping directly is done in the irqchip compose callback. The VFIO user API and VFIO layer changes have not changed though. All the patches now are in the same series. Tested on AMD Overdrive (single GICv2m frame) with I350 VF assignment. dependency: the series depends on Robin's generic-v7 branch: [1] [PATCH v7 00/22] Generic DT bindings for PCI IOMMUs and ARM SMMU http://www.spinics.net/lists/arm-kernel/msg531110.html Best Regards Eric Git: complete series available at https://github.com/eauger/linux/tree/generic-v7-pcie-passthru-v13 the above branch includes a temporary patch to work around a ThunderX pci bus reset crash (which I think unrelated to this series): "vfio: pci: HACK! workaround thunderx pci_try_reset_bus crash" Do not take this one for other platforms. Eric Auger (14): iommu: Introduce DOMAIN_ATTR_MSI_GEOMETRY iommu/arm-smmu: Initialize the msi geometry genirq/msi: Introduce the MSI doorbell API genirq/msi: msi_doorbell_calc_pages irqchip/gic-v2m: Register the MSI doorbell irqchip/gicv3-its: Register the MSI doorbell vfio: Introduce a vfio_dma type field vfio/type1: vfio_find_dma accepting a type argument vfio/type1: Implement recursive vfio_find_dma_from_node vfio/type1: Handle unmap/unpin and replay for VFIO_IOVA_RESERVED slots vfio: Allow reserved msi iova registration vfio/type1: Check doorbell safety iommu/arm-smmu: Do not advertise IOMMU_CAP_INTR_REMAP vfio/type1: Return the MSI geometry through VFIO_IOMMU_GET_INFO capability chains Robin Murphy (1): iommu/dma: Allow MSI-only cookies drivers/iommu/Kconfig | 2 + drivers/iommu/arm-smmu-v3.c | 5 +- drivers/iommu/arm-smmu.c | 6 +- drivers/iommu/dma-iommu.c | 40 +++++++ drivers/iommu/iommu.c | 5 + drivers/irqchip/irq-gic-v2m.c | 11 +- drivers/irqchip/irq-gic-v3-its.c | 14 +++ drivers/vfio/Kconfig | 1 + drivers/vfio/vfio_iommu_type1.c | 244 ++++++++++++++++++++++++++++++++++++--- include/linux/dma-iommu.h | 9 ++ include/linux/iommu.h | 14 +++ include/linux/msi-doorbell.h | 92 +++++++++++++++ include/uapi/linux/vfio.h | 42 ++++++- kernel/irq/Kconfig | 4 + kernel/irq/Makefile | 1 + kernel/irq/msi-doorbell.c | 162 ++++++++++++++++++++++++++ 16 files changed, 633 insertions(+), 19 deletions(-) create mode 100644 include/linux/msi-doorbell.h create mode 100644 kernel/irq/msi-doorbell.c -- 1.9.1
