On Thu, Feb 06, 2025 at 06:18:14PM +0000, Shameerali Kolothum Thodi wrote: > > So even if you invent an iommu ID we cannot accept it as a handle to > > create viommu in iommufd. > > Creating the vIOMMU only happens when the user does a cold/hot plug of > a VFIO device. At that time Qemu checks whether the assigned id matches > with whatever the kernel tell it.
This is not hard up until the guest is started. If you boot a guest without a backing viommu iommufd object then there will be some more complexities. Jason
