On Thu, Apr 13, 2023 at 02:35:57PM +0000, Liu, Yi L wrote: > Today, at least QEMU will not go to do hot-reset if _INFO fails. I think > this check may need to be relaxed if want _INFO work when there is > no VFIO_GROUP (also no fake iommu_group). Current qemu does not work if there is no VFIO_GROUP, so it doesn't matter. In cdev mode qemu should work differently, we can make the kernel return -1 for group_id and qemu can ignore group_id for the debug print, or we can just make it fail. Given qemu doesn't, and can't, support no-iommu this is pretty fringe stuff. Jason
