Thank you very much.. On Wed, Aug 4, 2021 at 10:39 PM Laine Stump <la...@redhat.com> wrote:
> > > On 8/4/21 3:21 AM, Jiatong Shen wrote: > > Hello community, > > > > I am working on plugging a xilinx fpga card as a hostdev. This fpga > > card has 2 functions, each has a different role, for some reason, I > > would like to attach both of them but do not want to attach them > > separately, so I have tried to attach a pci bridge where fpga cards > > connect to. but got the following error, > > > > error: Failed to attach device from bridge.xml > > > error: internal error: Non-endpoint PCI devices cannot be assigned to guests > > > > > > > so, my question is is it possible to attach a pci-bridge as hostdev? > > thank you. > > No, it isn't possible. VFIO only supports attaching endpoint devices. > > You will need to attach each of your endpoint devices separately. (If > the issue is that you want both devices to show up on the same root port > in the guest, that is easily accomplished by manually setting the > guest-side pci address of the devices to have the same same bus/slot, > but different function; this does mean that you can't hotplug, but will > deliver the desired topology. Note that although I've heard of people > who thought that they needed devices to be on the same slot, I've never > seen any evidence that this was actually required by any OS or driver) > > -- Best Regards, Jiatong Shen
