From: Tim Deegan <tim@xen.org>
Date: Thu, 8 Mar 2012 16:40:05 +0000 (+0000)
Subject: Tools: libxc side for setting up the mem sharing ring
X-Git-Tag: 4.2.0-rc1~665
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=f9f9daee79a5711c7cd880a10dbff02ed5cd749b;p=xen.git

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@lagarcavilla.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Tim Deegan <tim@xen.org>
---

diff --git a/tools/libxc/xc_memshr.c b/tools/libxc/xc_memshr.c
index 992b9144e5..ae60571dee 100644
--- a/tools/libxc/xc_memshr.c
+++ b/tools/libxc/xc_memshr.c
@@ -42,6 +42,31 @@ int xc_memshr_control(xc_interface *xch,
     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 --git a/tools/libxc/xenctrl.h b/tools/libxc/xenctrl.h
index b4dd9e80e0..812e72331d 100644
--- a/tools/libxc/xenctrl.h
+++ b/tools/libxc/xenctrl.h
@@ -1917,6 +1917,11 @@ int xc_mem_access_resume(xc_interface *xch, domid_t domain_id,
 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,