Re: [Xen-devel] [PATCH v3] xen/kbdif: Add features to disable keyboard and pointer

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Wed, May 02, 2018 at 10:16:08AM +0300, Oleksandr Andrushchenko wrote:
> From: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
> 
> It is now not fully possible to control if and which virtual devices
> are created by the frontend, e.g. keyboard and pointer devices
> are always created and multi-touch device is created if the
> backend advertises multi-touch support. In some cases this
> behavior is not desirable and better control over the frontend's
> configuration is required.
> 
> Add new XenStore feature fields, so it is possible to individually
> control set of exposed virtual devices for each guest OS:
>  - set feature-disable-keyboard to 1 if no keyboard device needs
>    to be created
>  - set feature-disable-pointer to 1 if no pointer device needs
>    to be created
> 
> Keep old behavior by default.
> 
> Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>

Thank you!
> ---
>  xen/include/public/io/kbdif.h | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/xen/include/public/io/kbdif.h b/xen/include/public/io/kbdif.h
> index 3ce54e9a44c1..9a0648bdced9 100644
> --- a/xen/include/public/io/kbdif.h
> +++ b/xen/include/public/io/kbdif.h
> @@ -51,6 +51,18 @@
>   * corresponding entries in XenStore and puts 1 as the value of the entry.
>   * If a feature is not supported then 0 must be set or feature entry omitted.
>   *
> + * feature-disable-keyboard
> + *      Values:         <uint>
> + *
> + *      If there is no need to expose a virtual keyboard device by the
> + *      frontend then this must be set to 1.
> + *
> + * feature-disable-pointer
> + *      Values:         <uint>
> + *
> + *      If there is no need to expose a virtual pointer device by the
> + *      frontend then this must be set to 1.
> + *
>   * feature-abs-pointer
>   *      Values:         <uint>
>   *
> @@ -177,6 +189,8 @@
>  
>  #define XENKBD_DRIVER_NAME             "vkbd"
>  
> +#define XENKBD_FIELD_FEAT_DSBL_KEYBRD  "feature-disable-keyboard"
> +#define XENKBD_FIELD_FEAT_DSBL_POINTER "feature-disable-pointer"
>  #define XENKBD_FIELD_FEAT_ABS_POINTER  "feature-abs-pointer"
>  #define XENKBD_FIELD_FEAT_MTOUCH       "feature-multi-touch"
>  #define XENKBD_FIELD_REQ_ABS_POINTER   "request-abs-pointer"
> -- 
> 2.17.0
> 

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