[virtio-dev] Re: [virtio-comment] [PATCH 1/2] transport-pci: Improve config msix vector description

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

On Thu, Apr 20, 2023 at 10:51:57PM +0300, Parav Pandit wrote:
> config_msix_vector is the register that holds the MSI-X vector number
> for receiving configuration change related interrupts.
> 
> It is not "for MSI-X".
> 
> Hence, replace the confusing text with appropriate one.
> 
> Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
> Signed-off-by: Parav Pandit <parav@nvidia.com>

it's unfortunate that the pci spec does not have a standard term
for msi-x table entry.

> ---
> changelog:
> v1->v2:
> - rewrote to indicate MSI-X table entry index
> v0->v1:
> - added 'here'
> - dropped 'receiving'
> ---
>  transport-pci.tex | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/transport-pci.tex b/transport-pci.tex
> index 1507c69..cf2c54d 100644
> --- a/transport-pci.tex
> +++ b/transport-pci.tex
> @@ -343,7 +343,8 @@ \subsubsection{Common configuration structure layout}\label{sec:Virtio Transport
>          Driver Feature Bits selected by \field{driver_feature_select}.
>  
>  \item[\field{config_msix_vector}]
> -        The driver sets the Configuration Vector for MSI-X.
> +        The driver writes the MSI-X table entry index in this field for
> +        Configuration change notification interrupts.


Urm not exactly. there is also a special value of 0xffff.
I feel this here is just a high level description.
how about
	Used by the driver to set the MSI-X vector for Configuration change notification interrupts.

pci spec also calls the entry "the vector" so I feel it's ok.




>  \item[\field{num_queues}]
>          The device specifies the maximum number of virtqueues supported here.
> -- 
> 2.26.2
> 
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