On 11/12/2018 18:31, Christoph Hellwig wrote: > On Tue, Dec 11, 2018 at 06:20:57PM +0000, Jean-Philippe Brucker wrote: >> Implement the virtio-iommu driver, following specification v0.9 [1]. >> >> Only minor changes since v5 [2]. I fixed issues reported by Michael and >> added tags from Eric and Bharat. Thanks! >> >> You can find Linux driver and kvmtool device on v0.9 branches [3], >> module and x86 support on virtio-iommu/devel. Also tested with Eric's >> QEMU device [4]. > > Just curious, what is the use case for it? The main use case is assigning a device to guest userspace, using VFIO both in the host and in the guest (the most cited example being DPDK). There are others, and I wrote a little more about them last week: https://www.spinics.net/lists/linux-pci/msg78529.html Thanks, Jean