Dom0 keyboard/mouse sharing/passthru to HVM guest
This feature is mostly needed by VGA/GPU passthru users, so they can share the dom0 keyboard/mouse to the HVM guest where they use the GPU.
Some initial implementations have been done earlier and discussed on xen-devel, but nothing has been merged to upstream Xen.
Earlier discussion and patches:
XenClient also has some implementation of keyboard/mouse sharing.
Gizmo Chicken commented
I'm not sure if this request is specific to XCP. But in any case, although I can passthrough keyboards/mice in vanilla Xen with relative ease, having a user friendly way to passthrough keyboards/mice in XCP would be great. And indeed, no reason to limit the request to passthrough of keyboards/mice in XCP. Having a user friendly way to configure PCI passthrough in XCP would be even better.