Virtio-vfio：Should we support virtio-vfio in the nearly future？

[jshachm]

Hey guys~
Now we have support four types virtio backend. Should we support virtio-vfio which is very useful in the device direct use.

[acatangiu]

@jshachm vfio was considered for Firecracker, but was ultimately dropped because it's incompatible with oversubscribing memory. Any mapped virtual-function will pin the process memory in the host kernel.

Unless we get a strong customer use-case where vfio is the right solution, support for this is excluded.

[raduweiss]

@jshachm, we'll be looking at this as part of #1179.

[sameo]

Now we have support four types virtio backend. Should we support virtio-vfio which is very useful in the device direct use.

@jshachm Is virtio-vfio defined anywhere?

[jshachm]

great~~ @raduweiss

@sameo sameo I mean vfio-pci and virtio-pci。。。 hah~

[sameo]

@jshachm fwiw, we're adding the VFIO crates to the rust-vmm project:
https://github.com/rust-vmm/vfio-ioctls
https://github.com/rust-vmm/vfio-bindings