KVM Forum 2019

Intel has introduced a new hardware-assisted IO virtualization technology, i.e. scalable IOV which provides much better flexibility and scalability in sharing of I/O devices like network interface cards, GPUs, and hardware accelerators across containers and VMs compared to the existing one - SR-IOV. In this presentation, the authors will take an overview of the scalable IOV technology from platform and device's perspective, introduce how to enable a typical scalable IOV device driver through vfio-mdev framework, how to compose the virtual device from scalable IOV capable device and bring up this virtual device, how the virtual device works and how the scalable IOV capable device works together with another PASID based technology SVA(Shared Virtual Address) in virtualization environment.