I am running Xen 4.6 on CentOS 7 in a Dell Poweredge T430 I need PCI Passthrough to get USB working. I am following the Xenproject Wiki I have enabled the Virtulasation in the BIOS. I have xen_pciback as a module I have issued the command: xl pci-assignable-add 00:1a0.0 and it shows up fine when I issue this xl pci-assignable-list
I have pci=['00:1a.0'] on the DomU config file I have added this iommu=soft and swiotlb=force both together and separately to the kernel command line in the DomU (running Debian 8), but I get the same error each time. libxl: error: libxl_pci.c:999:do_pci_add: xc_assign_device failed: Operation not permitted libxl: error: libxl_create.c:1424:domcreate_attach_pci: libxl_device_pci_add failed: -3 Can anyone suggest a cure for this? Many thanks Francis
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