What's the virtio Virtual machines interface standard and which ISA does it apply to?

Virtio is a virtualization standard for network and disk device drivers where just the guest's device driver "knows" it is running in a virtual environment. It enables guests to get high-performance network and disk operations, reducing the performance gap that often comes with virtualization.

Virtio architecture is independent of any specific hypervisor or operating system, meaning it can be used across different hypervisors like KVM, VirtualBox, and others, and different operating systems as well. Virtio is not tied to a specific Instruction Set Architecture (ISA). It works across different ISAs such as x86, ARM, and others. So, it applies widely across different ISAs in virtualized environments. For more information about virtio, you can visit the official document:

• https://docs.oasis-open.org/virtio/virtio/v1.1/virtio-v1.1.html

docs.oasis-open.org Virtual I/O Device (VIRTIO) Version 1.1 This document describes the specifications of the VIRTIO family of devices.