On Mon, 6 Aug 2018 16:39:51 -0600 Quincy Wofford <quincy.woff...@gmail.com> wrote:
> I'm attempting PCI-passthrough from host to guest on an HP ProLiant 380P, > which has an updated, yet rather old BIOS (2015), but it does support VT-d. > I'm running CentOS 7, kernel 3.10.0-862.9.1.el7.x86_64. > > I have an Intel 82580 NIC installed with 4 ports. Each of these ports is in > its own IOMMU group (I enabled SR-IOV at the BIOS, which might be the > reason they show up separately) > > After detaching and adding a 'hostdev' device with the appropriate pci > address, I attempt to start my VM. I get " failed to set iommu for > container: Operation not permitted". As recommended here ( > http://vfio.blogspot.com/2014/08/vfiovga-faq.html) I parsed dmesg in an > attempt to find: > > ------------------- > No interrupt remapping support. Use the module param > "allow_unsafe_interrupts" to enable VFIO IOMMU support on this platform > ------------------- > ...but nothing similar exists in my logs. > > Since this device is showing up in its own IOMMU group, I assume ACS > override won't get me any further. In any case, it is not an option for me > to leave ACS override on. I can turn it on for testing, the server is not > currently in production. > > Below you will find links to relevant configs: > > virsh edit monitor: https://pastebin.com/kzCR0E5t > nodedev-list --tree: https://pastebin.com/AfYJKZX9 > nodedev-dumpxml pci_0000_04_00_1: https://pastebin.com/VUurQ05Y > virsh start monitor: https://pastebin.com/6ANCL5pJ dmesg likely has the answer, probably reports: "Device is ineligible for IOMMU domain attach due to platform RMRR requirement. Contact your platform vendor." You can read more about it here: https://access.redhat.com/sites/default/files/attachments/rmrr-wp1.pdf The quick summary is that the hardware vendor has imposed a mapping requirement for the device that is incompatible with device assignment. AIUI HP for disabling these mappings for some systems, hopefully yours is one. Good luck, Alex _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
