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Re: [Xen-devel] RFC: drop frontend support for relative pointer

  • To: Markus Armbruster <armbru@xxxxxxxxxx>
  • From: Jean Guyader <jean.guyader@xxxxxxxxx>
  • Date: Mon, 12 Oct 2009 19:02:28 +0100
  • Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Daniel P. Berrange" <berrange@xxxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
  • Delivery-date: Mon, 12 Oct 2009 11:02:53 -0700
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2009/10/8 Markus Armbruster <armbru@xxxxxxxxxx>:
> Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> writes:
>> On Wed, 7 Oct 2009, Daniel P. Berrange wrote:
>>> That's good to know - stubdom was one area I was concerned about. To the
>>> best of my knowledge the only backend that ever sent relative mouse events
>>> was the old PVFB we had in Fedora 6 which was the original code before
>>> the eventual merge into official xen-devel trees. So official repos have
>>> always defaulted to absolute mode.  Hopefully no one out there has gone
>>> and re-implemented the PVFB backend in any other fork of Xen and dropped
>>> ABS mode or made REL the default ???
>>> IMHO if ABS mode is able to work correctly, then there's absolutely no
>>> benefit in having a REL mode at all, so its best deleted / removed.
>> I guess keeping around unused code doesn't make much sense but I was just
>> being cautious, given that for example XCI is currently using relative
>> coordinates so they are not dead just yet.
> Just to avoid misunderstandings:
> * Does XCI set feature-abs-pointer in xenstore?
> * If it does, does it read request-abs-pointer from xenstore?
> * Under what circumstances (if any) does it send XENKBD_TYPE_MOTION, and
>  under what circumstances (if any) does it send XENKBD_TYPE_POS?


I just checked and we have feature-abs-pointer and request-abs-pointer
set to 1 xenstore.
The function we use to inject mouse/keyboard event in the guess is
kbd_mouse_event and it works with xenkbd.


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