Re: [RFC PATCH v2 2/2] virtio-blk: add support for VIRTIO_F_ADMIN_VQ

[Stefan Hajnoczi <stefanha@redhat.com>]

On Mon, Jul 26, 2021 at 07:52:54PM +0300, Max Gurtovoy wrote:
> Set the relevant index in case of VIRTIO_F_ADMIN_VQ negotiation. Also
> restrict the negotiation of VIRTIO_F_ADMIN_VQ to be possible only if
> VIRTIO_BLK_F_MQ is negotiated.
> 
> Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
> ---
>  content.tex | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/content.tex b/content.tex
> index d350175..03e25da 100644
> --- a/content.tex
> +++ b/content.tex
> @@ -4406,6 +4406,16 @@ \subsection{Virtqueues}\label{sec:Device Types / Block Device / Virtqueues}
>   N=1 if VIRTIO_BLK_F_MQ is not negotiated, otherwise N is set by
>   \field{num_queues}.
>  
> + If VIRTIO_F_ADMIN_VQ is negotiated, queue0 is an admin virtqueue and the
> + request queues are shifted as the following:

"as follows:"

> +\begin{description}
> +\item[1] requestq1
> +\item[\ldots]
> +\item[N] requestqN
> +\end{description}
> +
> + if VIRTIO_BLK_F_MQ is not negotiated, VIRTIO_F_ADMIN_VQ MUST NOT be
> + negotiated.

Why?

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