virtio: multiqueue virtio endian fixes

On Wed, Jan 22, 2014 at 02:55:21PM +1030, Rusty Russell wrote:
> Michael's patch adding MQ support added some u16s; they are u16 in
> legacy mode but should be le16 for modern devices. >
> Signed-off-by: Rusty Russell <>  Yes, it's better to be consistent.
> diff --git a/content.tex b/content.tex
> index 803615d..b038b0c 100644 > --- a/content.tex > +++ b/content.tex > @@ -2440,12 +2440,12 @@ is negotiated.  Legal values for this field are 1 to 0x8000.
>  	struct virtio_net_config {
>  		u8 mac[6];
>  		le16 status; > -		u16 max_virtqueue_pairs; > +		le16 max_virtqueue_pairs; >  	};
>  end{lstlisting} >
>  subsubsection{Legacy Interface: Device configuration layout}label{sec:Device Types / Network Device / Device configuration layout / Legacy Interface: Device configuration layout} > -For legacy devices, the status field in struct virtio_net_config is the > +For legacy devices, the status and max_virtqueue_pairs fields in struct virtio_net_config are the
>  native endian of the guest rather than (necessarily) little-endian. >
>
> @@ -2851,7 +2851,7 @@ depending on the packet flow. >
>  egin{lstlisting}
>  	struct virtio_net_ctrl_mq { > -		u16 virtqueue_pairs; > +		le16 virtqueue_pairs; >  	}; >
>  	#define VIRTIO_NET_CTRL_MQ
4 > @@ -2884,6 +2884,10 @@ transmitq1..transmitqN (i.e. other than transmitq0); accordingly,
>  the driver MUST NOT transmit new packets on virtqueues other than
>  transmitq0. >
> +subparagraph{Legacy Interface: Automatic receive steering in multiqueue mode}label{sec:Device Types / Network Device / Device Operation / Control Virtqueue / Automatic receive steering in multiqueue mode / Legacy Interface: Automatic receive steering in multiqueue mode} > +For legacy devices, the virtqueue_paris field is in the > +native endian of the guest rather than (necessarily) little-endian. > +
>  paragraph{Offloads State Configuration}label{sec:Device Types / Network Device / Device Operation / Control Virtqueue / Offloads State Configuration} >
>  If the VIRTIO_NET_F_CTRL_GUEST_OFFLOADS feature is negotiated, the driver can