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1What: /sys/class/iommu/<iommu>/amd-iommu/cap2Date: June 20143KernelVersion: 3.174Contact: Alex Williamson <alex.williamson@redhat.com>5Description:6 IOMMU capability header as documented in the AMD IOMMU7 specification. Format: %x8 9What: /sys/class/iommu/<iommu>/amd-iommu/features10Date: June 201411KernelVersion: 3.1712Contact: Alex Williamson <alex.williamson@redhat.com>13Description:14 Extended features of the IOMMU. Format: %llx15