Hi Jean, On 11/22/18 8:37 PM, Jean-Philippe Brucker wrote: > Implement the virtio-iommu driver, following specification v0.9 [1]. > > Since v4 [2] I fixed the issues reported by Eric, and added Reviewed-by > from Eric and Rob. Thanks! > > I changed the specification to fix one inconsistency discussed in v4. > That the device fills the probe buffer with zeroes is now a "SHOULD" > instead of a "MAY", since it's the only way for the driver to know if > the device wrote the status. Existing devices already do this. In > addition the device now needs to fill the three padding bytes at the > tail with zeroes. > > You can find Linux driver and kvmtool device on branches > virtio-iommu/v0.9 [3]. I also lightly tested with Eric's latest QEMU > device [4]. > > [1] Virtio-iommu specification v0.9, sources, pdf and diff from v0.8 > git://linux-arm.org/virtio-iommu.git virtio-iommu/v0.9 > http://jpbrucker.net/virtio-iommu/spec/v0.9/virtio-iommu-v0.9.pdf > http://jpbrucker.net/virtio-iommu/spec/diffs/virtio-iommu-pdf-diff-v0.8-v0.9.pdf > > [2] [PATCH v4 0/7] Add virtio-iommu driver > https://lists.linuxfoundation.org/pipermail/iommu/2018-November/031074.html > > [3] git://linux-arm.org/linux-jpb.git virtio-iommu/v0.9 > git://linux-arm.org/kvmtool-jpb.git virtio-iommu/v0.9 > > [4] [RFC v9 00/17] VIRTIO-IOMMU device > https://www.mail-archive.com/qemu-devel@xxxxxxxxxx/msg575578.html > > Jean-Philippe Brucker (7): > dt-bindings: virtio-mmio: Add IOMMU description > dt-bindings: virtio: Add virtio-pci-iommu node > of: Allow the iommu-map property to omit untranslated devices > PCI: OF: Initialize dev->fwnode appropriately > iommu: Add virtio-iommu driver > iommu/virtio: Add probe request > iommu/virtio: Add event queue > > .../devicetree/bindings/virtio/iommu.txt | 66 + > .../devicetree/bindings/virtio/mmio.txt | 30 + > MAINTAINERS | 7 + > drivers/iommu/Kconfig | 11 + > drivers/iommu/Makefile | 1 + > drivers/iommu/virtio-iommu.c | 1157 +++++++++++++++++ > drivers/of/base.c | 10 +- > drivers/pci/of.c | 7 + > include/uapi/linux/virtio_ids.h | 1 + > include/uapi/linux/virtio_iommu.h | 161 +++ > 10 files changed, 1448 insertions(+), 3 deletions(-) > create mode 100644 Documentation/devicetree/bindings/virtio/iommu.txt > create mode 100644 drivers/iommu/virtio-iommu.c > create mode 100644 include/uapi/linux/virtio_iommu.h > for the whole series Tested-by: Eric Auger <eric.auger@xxxxxxxxxx> Thanks Eric
