[Xen-devel] [PATCH v9 02/10] libxc: add libxc support for setting grant table resource limits

[Juergen Gross <jgross@xxxxxxxx>]

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@xxxxxxxx>
Reviewed-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>
Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---
V4:
- use domid_t (Wei Liu)
---
 tools/libxc/include/xenctrl.h | 13 +++++++++++++
 tools/libxc/xc_domain.c       | 13 +++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/tools/libxc/include/xenctrl.h b/tools/libxc/include/xenctrl.h
index 073fbc9b08..182367e7f4 100644
--- 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 f40dc4fd7b..4a7078008f 100644
--- 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,
-- 
2.12.3


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