On Mon, Nov 07, 2022 at 08:48:53PM -0400, Jason Gunthorpe wrote: > [ > This has been in linux-next for a little while now, and we've completed > the syzkaller run. 1300 hours of CPU time have been invested since the > last report with no improvement in coverage or new detections. syzkaller > coverage reached 69%(75%), and review of the misses show substantial > amounts are WARN_ON's and other debugging which are not expected to be > covered. > ] > > iommufd is the user API to control the IOMMU subsystem as it relates to > managing IO page tables that point at user space memory. [chop cc list] s390 mdev maintainers, Can I ask your help to test this with the two S390 mdev drivers? Now that gvt is passing and we've covered alot of the QA ground it is a good time to run it. Take the branch from here: https://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd.git/log/?h=for-next And build the kernel with CONFIG_VFIO_CONTAINER=n CONFIG_IOMMUFD=y CONFIG_IOMMUFD_VFIO_CONTAINER=y And your existing stuff should work with iommufd providing the iommu support to vfio. There will be a dmesg confirming this. Let me know if there are any problems! If I recall there was some desire from the S390 platform team to start building on iommufd to create some vIOMMU acceleration for S390 guests, this is a necessary first step. Thanks, Jason
