Melvin wrote: > But for VT-c, not VT-d. > Does VT-c NIC require SR-IOV in bios, or VT-c NIC can be use only with > VT-d, > without SR-IOV feature.
VT-c is Intel's collective name for virtualisation technologies for networking including SR-IOV enabled NICs and VMDQ. If you are intending to use SR-IOV then both the NIC and BIOS must support SR-IOV. You can use VMDQ without BIOS SR-IOV support but that will only allow multiple queues to dom0, not pass-through to VMs. Cheers, James > -----Message d'origine----- > De : James Bulpin [mailto:[email protected]] > Envoyé : 22 octobre 2012 08:16 > À : Melvin B. > Cc : [email protected] > Objet : RE: [Xen-API] PCI passthrough limit of device? > > (Adding the list back to CC - please don't remove the list; by keeping > the discussion public others may be able to benefit from the > discussion.) > > Melvin wrote: > > My last question is about intel VT-c and SR-IOV NIC. > > If SR-IOV NIC require a Motherboard feature other than VT-d ? > > Your BIOS must support SR-IOV. > > > And if VT-c is for device only, require only a motherboard with VT-d? > > You can perform PCI pass-through to a PV guest without VT-d/IOMMU but > that > is unsafe (e.g. the device could DMA to other guests' memory) so VT-d > is > recommended. If you want to pass-through to a HVM guest you must use > VT-d/IOMMU. > > See http://wiki.xen.org/wiki/Xen_PCI_Passthrough for more detail. > > Cheers, > James _______________________________________________ Xen-api mailing list [email protected] http://lists.xen.org/cgi-bin/mailman/listinfo/xen-api
