This series implements the virtio-iommu device. This v4 is an upgrade to v0.4 spec [1] and applies on QEMU v2.10.0. - probe request support although no reserved region is returned at the moment - unmap semantics less strict, as specified in v0.4 - device registration, attach/detach revisited - split into smaller patches to ease review - propose a way to inform the IOMMU mr about the page_size_mask of underlying HW IOMMU, if any - remove warning associated with the translation of the MSI doorbell
The device gets instantiated using the "-device virtio-iommu-device" option. It currently works with ARM virt machine only, as the machine must handle the dt binding between the virtio-mmio "iommu" node and the PCI host bridge node. The associated VHOST/VFIO adaptation is available on the branch below but is not officially delivered as part of this series. Best Regards Eric This series can be found at: https://github.com/eauger/qemu/tree/v2.10.0-virtio-iommu-v4 References: [1] [RFC] virtio-iommu version 0.4 git://linux-arm.org/virtio-iommu.git branch viommu/v0.4 Testing: - guest kernel with v0.4 virtio-iommu driver (4kB page) - tested with guest using virtio-pci-net and vhost-net (,vhost=on/off,iommu_platform,disable-modern=off,disable-legacy=on ) - tested with VFIO and guest assigned with 2 VFs - tested with DPDK on guest with 2 assigned VFs Not tested: - hot-plug/hot-unplug of EP: not implemented History: v2-> v4: - see above v2 -> v3: - rebase on top of 2.10-rc0 and especially [PATCH qemu v9 0/2] memory/iommu: QOM'fy IOMMU MemoryRegion - add mutex init - fix as->mappings deletion using g_tree_ref/unref - when a dev is attached whereas it is already attached to another address space, first detach it - fix some error values - page_sizes = TARGET_PAGE_MASK; - I haven't changed the unmap() semantics yet, waiting for the next virtio-iommu spec revision. v1 -> v2: - fix redifinition of viommu_as typedef Eric Auger (16): update-linux-headers: import virtio_iommu.h linux-headers: Update for virtio-iommu virtio-iommu: add skeleton virtio-iommu: Decode the command payload virtio-iommu: Add the iommu regions virtio-iommu: Register attached devices virtio-iommu: Implement attach/detach command virtio-iommu: Implement map/unmap virtio-iommu: Implement translate virtio-iommu: Implement probe request hw/arm/virt: Add 2.11 machine type hw/arm/virt: Add virtio-iommu to the virt board memory.h: Add set_page_size_mask IOMMUMemoryRegion callback hw/vfio/common: Set the IOMMUMemoryRegion supported page sizes virtio-iommu: Implement set_page_size_mask hw/vfio/common: Do not print error when viommu translates into an mmio region hw/arm/virt.c | 115 +++- hw/vfio/common.c | 7 +- hw/virtio/Makefile.objs | 1 + hw/virtio/trace-events | 24 + hw/virtio/virtio-iommu.c | 923 ++++++++++++++++++++++++++ include/exec/memory.h | 4 + include/hw/arm/virt.h | 5 + include/hw/vfio/vfio-common.h | 1 + include/hw/virtio/virtio-iommu.h | 61 ++ include/standard-headers/linux/virtio_ids.h | 1 + include/standard-headers/linux/virtio_iommu.h | 177 +++++ linux-headers/linux/virtio_iommu.h | 1 + scripts/update-linux-headers.sh | 3 + 13 files changed, 1312 insertions(+), 11 deletions(-) create mode 100644 hw/virtio/virtio-iommu.c create mode 100644 include/hw/virtio/virtio-iommu.h create mode 100644 include/standard-headers/linux/virtio_iommu.h create mode 100644 linux-headers/linux/virtio_iommu.h -- 2.5.5
