[virtio-comment] Re: [PATCH v10 08/10] admin: command list discovery

["Michael S. Tsirkin" <mst@redhat.com>]

On Thu, Mar 02, 2023 at 04:09:29PM -0500, Stefan Hajnoczi wrote:
> Is the purpose of VIRTIO_ADMIN_CMD_LIST_USE so that new commands can be
> added that are mandatory for device operation. Failure to include them
> in the VIRTIO_ADMIN_CMD_LIST_USE command terminates device
> initialization with an error?

Or, switches the device to some legacy mode.

> Are commands evolved by defining flag/version bits in the command
> specific data struct? For example, if a new field needs to be added to a
> command and a 0 value carries a meaning (so it cannot simply be added to
> the end of the existing struct with backwards compatibility).
> 

commands expect to be evolved by extending the command specific
structure at the tail. this is why I spent so much time
on that in the text. if that does not work a new command will
work.

-- 
MST


This publicly archived list offers a means to provide input to the
OASIS Virtual I/O Device (VIRTIO) TC.

In order to verify user consent to the Feedback License terms and
to minimize spam in the list archive, subscription is required
before posting.

Subscribe: virtio-comment-subscribe@lists.oasis-open.org
Unsubscribe: virtio-comment-unsubscribe@lists.oasis-open.org
List help: virtio-comment-help@lists.oasis-open.org
List archive: https://lists.oasis-open.org/archives/virtio-comment/
Feedback License: https://www.oasis-open.org/who/ipr/feedback_license.pdf
List Guidelines: https://www.oasis-open.org/policies-guidelines/mailing-lists
Committee: https://www.oasis-open.org/committees/virtio/
Join OASIS: https://www.oasis-open.org/join/