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Traditionally, Virtio is primarily used in virtualized environments to allow the Hypervisor to Guest communication in an agnostic way. But Virtio as a standard can be leveraged outside virtualization for communication between any two entities.
The PCI Endpoint subsystem in the Linux kernel is used to run Linux on tiny PCI endpoint devices such as modems, NIC, GPU, etc... It requires the developers to write function drivers to communicate with the host. On most occasions, these function drivers also require counterpart drivers on the host systems. This increases the time required for the project's development, as the development needs to happen on both the host and endpoint systems.
This is where Virtio comes in handy for the PCI Endpoint subsystem. With Virtio, developers can focus on developing the back-end drivers on the endpoint side and leverage the existing front-end drivers on host systems (such as virt-net, virt-gpu, etc...).
In this talk, Manivannan Sadhasivam will present the proposals received from the community for adding Virtio backend support to the PCI Endpoint subsystem and elaborate on the one that got a consensus to move forward, along with the future plans.
Mani is a Senior Kernel Engineer at the Qualcomm Landing team of Linaro. He maintains the PCI Endpoint Subsystem, Qualcomm MHI bus, and several drivers in the Linux Kernel.
