On Tue, Oct 05, 2021 at 03:57:17PM +0530, Ani Sinha wrote: > > > On Fri, 1 Oct 2021, Jean-Philippe Brucker wrote: > > > Add two test cases for VIOT, one on the q35 machine and the other on > > virt. To test complex topologies the q35 test has two PCIe buses that > > bypass the IOMMU (and are therefore not described by VIOT), and two > > buses that are translated by virtio-iommu. > > > > Signed-off-by: Jean-Philippe Brucker <jean-phili...@linaro.org> > > This might be a stupid question but what about virtio-mmio and single mmio > cases? I see none of your tables has nodes for those and here too you do > not add test cases for it.
No it's a good question, there is no support for either at the moment. virtio-mmio based virtio-iommu is relatively easy to implement, just requires a little more machine support. QEMU doesn't support putting MMIO endpoints behind an IOMMU at the moment, and implementing that is more complicated. To test the Linux VIOT driver I did both prototypes, but I don't have a compelling reason or time to upstream them at the moment https://jpbrucker.net/git/qemu/log/?h=virtio-iommu/acpi-2021-06-02 Thanks, Jean
