EVTCHNOP_alloc_unbound can allocate a port in an arbitrary

domain (only if the caller is sufficiently privileged).

Signed-off-by: Keir Fraser <keir@xensource.com>

2 files changed, 5 insertions, 1 deletions

diff --git a/tools/libxc/xc_evtchn.c b/tools/libxc/xc_evtchn.c
index f7698d3541..3bdacf36a3 100644
--- a/tools/libxc/xc_evtchn.c
+++ b/tools/libxc/xc_evtchn.c
@@ -33,6 +33,7 @@ static int do_evtchn_op(int xc_handle, evtchn_op_t *op)
 
 
 int xc_evtchn_alloc_unbound(int xc_handle,
+                            u32 remote_dom,
                             u32 dom,
                             int *port)
 {
@@ -40,6 +41,7 @@ int xc_evtchn_alloc_unbound(int xc_handle,
     int         rc;
 
     op.cmd = EVTCHNOP_alloc_unbound;
+    op.u.alloc_unbound.remote_dom = (domid_t)remote_dom;
     op.u.alloc_unbound.dom  = (domid_t)dom;
     op.u.alloc_unbound.port = (port != NULL) ? *port : 0;
 
diff --git a/tools/libxc/xenctrl.h b/tools/libxc/xenctrl.h
index 2fe9bee750..3e74c62fa0 100644
--- a/tools/libxc/xenctrl.h
+++ b/tools/libxc/xenctrl.h
@@ -306,13 +306,15 @@ typedef evtchn_status_t xc_evtchn_status_t;
  * well-known port within a domain to receive events on.
  *
  * @parm xc_handle a handle to an open hypervisor interface
- * @parm dom the ID of the domain.  This maybe DOMID_SELF
+ * @parm remote_dom the ID of the domain who will later bind
+ * @parm dom the ID of the local domain (the 'allocatee')
  * @parm port a pointer to a port.  This is an in/out parameter.  If *port is
  *            0, then a new port will be assigned, if port is > 0 then that
  *            port is allocated if the port is unallocated.
  * @return 0 on success, -1 on failure
  */
 int xc_evtchn_alloc_unbound(int xc_handle,
+                            u32 remote_dom,
                             u32 dom,
                             int *port);