libxc: add libxc support for setting grant table resource limits

Add a new libxc function xc_domain_set_gnttbl_limits() setting the
limits for the maximum numbers of grant table frames and maptrack
frames of a domain.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>

diff --git a/tools/libxc/include/xenctrl.h b/tools/libxc/include/xenctrl.h
index 073fbc9b08afd3bb41e1c3123683c4960c32a16e..182367e7f4a1f6d9995fd85c1419bbb6eee1c260 100644 (file)
--- a/tools/libxc/include/xenctrl.h
+++ b/tools/libxc/include/xenctrl.h
@@ -1064,6 +1064,19 @@ int xc_domain_set_virq_handler(xc_interface *xch, uint32_t domid, int virq);
 int xc_domain_set_max_evtchn(xc_interface *xch, uint32_t domid,
                              uint32_t max_port);
 
+/**
+ * Set the maximum number of grant frames and maptrack frames a domain
+ * can have. Must be used at domain setup time and only then.
+ *
+ * @param xch a handle to an open hypervisor interface
+ * @param domid the domain id
+ * @param grant_frames max. number of grant frames
+ * @param maptrack_frames max. number of maptrack frames
+ */
+int xc_domain_set_gnttab_limits(xc_interface *xch, domid_t domid,
+                                uint32_t grant_frames,
+                                uint32_t maptrack_frames);
+
 /*
  * CPUPOOL MANAGEMENT FUNCTIONS
  */

diff --git a/tools/libxc/xc_domain.c b/tools/libxc/xc_domain.c
index f40dc4fd7bb082ac507bc4d96b36fad6b90ad316..4a7078008f4bb1fa4749733bd484e3d5c961c18e 100644 (file)
--- a/tools/libxc/xc_domain.c
+++ b/tools/libxc/xc_domain.c
@@ -2266,6 +2266,19 @@ int xc_domain_set_max_evtchn(xc_interface *xch, uint32_t domid,
     return do_domctl(xch, &domctl);
 }
 
+int xc_domain_set_gnttab_limits(xc_interface *xch, domid_t domid,
+                                uint32_t grant_frames,
+                                uint32_t maptrack_frames)
+{
+    DECLARE_DOMCTL;
+
+    domctl.cmd = XEN_DOMCTL_set_gnttab_limits;
+    domctl.domain = domid;
+    domctl.u.set_gnttab_limits.grant_frames = grant_frames;
+    domctl.u.set_gnttab_limits.maptrack_frames = maptrack_frames;
+    return do_domctl(xch, &domctl);
+}
+
 /* Plumbing Xen with vNUMA topology */
 int xc_domain_setvnuma(xc_interface *xch,
                        uint32_t domid,