RE: [PATCH v3 2/3] virtio: document feature bit 42

> From: Zhu Lingshan <[email protected]>
> Sent: 23 June 2025 02:07 PM
> 
> This commit documents feture bit 42
> VIRTIO_NET_F_GUEST_RSC6
> 
> Fixes: 94384142 ("content: Declare virtio-net legacy feature bits 41-42")
> Signed-off-by: Zhu Lingshan <[email protected]>
> ---
>  content.tex | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/content.tex b/content.tex
> index 1efc2a5..2e8da46 100644
> --- a/content.tex
> +++ b/content.tex
> @@ -99,10 +99,10 @@ \section{Feature Bits}\label{sec:Basic Facilities of a
> Virtio Device / Feature B  \begin{description}
>  \item[0 to 23, and 50 to 127] Feature bits for the specific device type
> 
> -\item[24 to 41] Feature bits reserved for extensions to the queue and
> +\item[24 to 42] Feature bits reserved for extensions to the queue and
>    feature negotiation mechanisms, see \ref{sec:Reserved Feature Bits}
> 
This does not look accurate.
Bits 41 and 42 are used by the device specific type and not generic queue related mechanism.
In this case it is used by the net device.

So right documentation should be,

0 to 23, 41, 42 and 50 to 127 Feature bits for the specific device type

24 to 40 Feature bits reserved for extensions to the queue and feature negotiation mechanisms

43 to 49, and 128 and above Feature bits reserved for future extensions.

> -\item[42 to 49, and 128 and above] Feature bits reserved for future
> extensions.
> +\item[43 to 49, and 128 and above] Feature bits reserved for future
> extensions.
>  \end{description}
> 
>  \begin{note}
> --
> 2.49.0
>