Re: [Qemu-devel] [v2][RFC][PATCH] virtio: uniform virtio device IDs

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

On Mon, Feb 09, 2015 at 03:01:15PM +0800, Chen, Tiejun wrote:
> On 2015/2/8 18:48, Michael S. Tsirkin wrote:
> >On Fri, Feb 06, 2015 at 01:14:46PM +0100, Cornelia Huck wrote:
> >>On Fri,  6 Feb 2015 13:41:26 +0800
> >>Tiejun Chen <tiejun.chen@intel.com> wrote:
> >>
> >>>Actually we define these device IDs in virtio standard, so
> >>>we'd better put them into one common place to manage conveniently.
> >>>Here I also add VIRTIO_ID_RESERVE according to virtio spec.
> >>>
> >>>Signed-off-by: Tiejun Chen <tiejun.chen@intel.com>
> >
> >We really should just write a script to import the headers
> >from the linux kernel.
> >They will need some tweaks to avoid dependencies on
> >linux/types, but this seems easy to do - better than
> >trying to keep things in sync manually.
> 
> I prefer Cornelia's comment since actually we're trying to define a little
> bit according to a spec, so the following may be enough?
> 
> diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
> index f24997d..4afb0b7 100644
> --- a/include/hw/virtio/virtio.h
> +++ b/include/hw/virtio/virtio.h
> @@ -23,6 +23,22 @@
>  #include "hw/virtio/virtio-9p.h"
>  #endif
> 
> +/* Refer to VirtIO Spec 1.0. */
> +
> +#define VIRTIO_ID_RESERVED  0           /* reserved (invalid)*/
> +#define VIRTIO_ID_NET       1           /* network card */
> +#define VIRTIO_ID_BLOCK     2           /* block device */
> +#define VIRTIO_ID_CONSOLE   3           /* console */
> +#define VIRTIO_ID_RNG       4           /* entropy source */
> +#define VIRTIO_ID_BALLOON   5           /* memory ballooning */
> +#define VIRTIO_ID_IOMEMORY  6           /* ioMemory */
> +#define VIRTIO_ID_RPMSG     7           /* rpmsg */
> +#define VIRTIO_ID_SCSI      8           /* SCSI host */
> +#define VIRTIO_ID_9P        9           /* 9P transport */
> +#define VIRTIO_ID_MAC80211_WALN 10      /* mac80211 wlan */
> +#define VIRTIO_ID_RPROC_SERIAL  11      /* rproc seria */
> +#define VIRTIO_ID_CAIF      12          /* virtio CAIF */
> +
>  /* from Linux's linux/virtio_config.h */
> 
>  /* Status byte for guest to report progress, and synchronize features. */
> 
> Thanks
> Tiejun

This still means each change has to be done in two places.
An automated script for copying headers would be much better IMHO.

-- 
MST