Re: [PATCH 1/2] Add VIRTIO_RING_F_INDIRECT_SIZE

[Stefan Hajnoczi <stefanha@redhat.com>]

On Tue, Dec 14, 2021 at 04:13:10PM +0100, Christian Schoenebeck wrote:
> This new feature flag allows to decouple the maximum amount of
> descriptors in indirect descriptor tables from the Queue Size.
> 
> Fixes: https://github.com/oasis-tcs/virtio-spec/issues/122
> Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
> ---
>  content.tex    | 21 +++++++++++++++++++++
>  split-ring.tex |  2 +-
>  2 files changed, 22 insertions(+), 1 deletion(-)
> 
> diff --git a/content.tex b/content.tex
> index 5d112af..0aa4842 100644
> --- a/content.tex
> +++ b/content.tex
> @@ -6693,6 +6693,27 @@ \chapter{Reserved Feature Bits}\label{sec:Reserved Feature Bits}
>    transport specific.
>    For more details about driver notifications over PCI see \ref{sec:Virtio Transport Options / Virtio Over PCI Bus / PCI-specific Initialization And Device Operation / Available Buffer Notifications}.
>  
> +  \item[VIRTIO_RING_F_INDIRECT_SIZE(40)] This feature indicates that the

Another feature bit was added in the meantime:

  \item[VIRTIO_F_RING_RESET(40)] This feature indicates
                            ^^

Please use 41 and update the text that says:

  \item[24 to 40] Feature bits reserved for extensions to the queue and
  feature negotiation mechanisms

  \item[41 to 49, and 128 and above] Feature bits reserved for future extensions.

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