[Xen-changelog] [xen-unstable] Tools: libxc side for setting up the mem sharing ring

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Tim Deegan <tim@xxxxxxx>
# Date 1331224805 0
# Node ID 07913faff6847f29d8d0d98608fcabf97d12fb73
# Parent  42b977df17be6137cfa5e306ac2f84afafe97e73
Tools: libxc side for setting up the mem sharing ring

This ring is used to report failed allocations in the unshare path.

Signed-off-by: Andres Lagar-Cavilla <andres@xxxxxxxxxxxxxxxx>
Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Committed-by: Tim Deegan <tim@xxxxxxx>
---


diff -r 42b977df17be -r 07913faff684 tools/libxc/xc_memshr.c
--- a/tools/libxc/xc_memshr.c   Thu Mar 08 16:40:05 2012 +0000
+++ b/tools/libxc/xc_memshr.c   Thu Mar 08 16:40:05 2012 +0000
@@ -42,6 +42,31 @@
     return do_domctl(xch, &domctl);
 }
 
+int xc_memshr_ring_enable(xc_interface *xch, 
+                          domid_t domid, 
+                          uint32_t *port)
+{
+    if ( !port )
+    {
+        errno = EINVAL;
+        return -1;
+    }
+        
+    return xc_mem_event_control(xch, domid,
+                                XEN_DOMCTL_MEM_EVENT_OP_SHARING_ENABLE,
+                                XEN_DOMCTL_MEM_EVENT_OP_SHARING,
+                                port);
+}
+
+int xc_memshr_ring_disable(xc_interface *xch, 
+                           domid_t domid)
+{
+    return xc_mem_event_control(xch, domid,
+                                XEN_DOMCTL_MEM_EVENT_OP_SHARING_DISABLE,
+                                XEN_DOMCTL_MEM_EVENT_OP_SHARING,
+                                NULL);
+}
+
 static int xc_memshr_memop(xc_interface *xch, domid_t domid, 
                             xen_mem_sharing_op_t *mso)
 {
diff -r 42b977df17be -r 07913faff684 tools/libxc/xenctrl.h
--- a/tools/libxc/xenctrl.h     Thu Mar 08 16:40:05 2012 +0000
+++ b/tools/libxc/xenctrl.h     Thu Mar 08 16:40:05 2012 +0000
@@ -1917,6 +1917,11 @@
 int xc_memshr_control(xc_interface *xch,
                       domid_t domid,
                       int enable);
+int xc_memshr_ring_enable(xc_interface *xch, 
+                          domid_t domid, 
+                          uint32_t *port);
+int xc_memshr_ring_disable(xc_interface *xch, 
+                           domid_t domid);
 int xc_memshr_nominate_gfn(xc_interface *xch,
                            domid_t domid,
                            unsigned long gfn,

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