What: /sys/class/iommu//devices/ Date: June 2014 KernelVersion: 3.17 Contact: Alex Williamson Description: IOMMU drivers are able to link devices managed by a given IOMMU here to allow association of IOMMU to device. What: /sys/devices/.../iommu Date: June 2014 KernelVersion: 3.17 Contact: Alex Williamson Description: IOMMU drivers are able to link the IOMMU for a given device here to allow association of device to IOMMU.