On Sat, May 5, 2018 at 6:09 PM, Kevin Cody-Little <kcod...@gmail.com> wrote: > > Folks, > > > I bought into parts for a new home firewall thinking it would provide an > IOMMU. As it turns out, that's a "cancelled feature" on AM1 systems, and > now I've got an ET in my hands that may as well be a PT.
You can still allocate VFs assuming your platform supports SR-IOV, you just wouldn't be able to assign the VFs to a guest securely since you wouldn't have any memory isolation between the guests and your host system. SR-IOV itself doesn't have any dependency on the IOMMU, it is the VFIO driver that has requirements for that in order to assign it to a KVM guest. > I was wondering if it's possible to activate the virtual functions of > the card without one? Let's say if I don't care about passing the device > into a KVM guest, but only want to make a additional "ethFOO" devices > appear and assign them into LXC namespaces? If the SR-IOV isn't working at all then the issue is probably the fact that the BIOS hasn't assigned either busses or resources to the device for the VFs. One thing that would be useful would be a "lspci -vvv" dump for one of the ports in question in order to verify. I suspect you will need to use the kernel boot parameters "pci=assign-busses" and "pci=realloc". With those two parameters the kernel should allocate a set of busses for the VFs assuming you don't have support for ARI, and it should reallocate the resources to the device which should populate the SR-IOV BAR. > I could probably handle code changes for something like this, if someone > who's current on the codebase can help me work out a strategy and a > to-do list. The above suggestions should be all that is needed to get the SR-IOV functionality working on the host. Hope that helps. - Alex ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
