First review for Version 1.2 - ends June 8th
OASIS and the OASIS Virtual I/O Device (VIRTIO) TC are pleased to announce that Virtual I/O Device (VIRTIO) Version 1.2 is now available for public review and comment.
VIRTIO v1.2 is the largest ever release of the ‘virtio’ specification, with 9 new device types as well as significant new functionality in existing devices, and addressing comments by more than 45 individuals from more than 15 organizations. This specification is fully compatible with the previous version, VIRTIO v1.1.
This document describes the specifications of the ‘virtio’ family of devices. These devices are found in virtual environments, yet by design they look like physical devices to the guest within the virtual machine – and this document treats them as such. This similarity allows the guest to use standard drivers and discovery mechanisms. The purpose of virtio and this specification is that virtual environments and guests should have a straightforward, efficient, standard and extensible mechanism for virtual devices, rather than boutique per-environment or per-OS mechanisms.
The documents and related files are available here:
Virtual I/O Device (VIRTIO) Version 1.2
Committee Specification Draft 01
09 May 2022
Editable source (Authoritative):
Example driver listing:
PDF file marked to indicate changes from Version 1.1 Committee Specification 01:
For your convenience, OASIS provides a complete package of the specification document and any related files in ZIP distribution files. You can download the ZIP file at:
A public review metadata record documenting this and any previous public reviews is available at:
How to Provide Feedback
OASIS and the OASIS Virtual I/O Device (VIRTIO) TC value your feedback. We solicit input from developers, users and others, whether OASIS members or not, for the sake of improving the interoperability and quality of its technical work.
The public review starts 10 May 2022 at 00:00 UTC and ends 08 June 2022 at 23:59 UTC.
Comments may be submitted to the TC by any person through the use of the OASIS TC Comment Facility which can be used by following the instructions on the TC’s “Send A Comment” page (https://www.oasis-open.org/committees/comments/index.php?wg_abbrev=virtio).
Comments submitted by TC non-members for this work and for other work of this TC are publicly archived and can be viewed at:
All comments submitted to OASIS are subject to the OASIS Feedback License, which ensures that the feedback you provide carries the same obligations at least as the obligations of the TC members. In connection with this public review, we call your attention to the OASIS IPR Policy  applicable especially  to the work of this technical committee. All members of the TC should be familiar with this document, which may create obligations regarding the disclosure and availability of a member’s patent, copyright, trademark and license rights that read on an approved OASIS specification.
OASIS invites any persons who know of any such claims to disclose these if they may be essential to the implementation of the above specification, so that notice of them may be posted to the notice page for this TC’s work.
Additional information about the specification and the VIRTIO TC can be found at the TC’s public home page: