From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dario Faggioli <dario.faggioli@citrix.com>
Subject: [PATCH 5 of 8] libxc: allow for explicitly specifying
	node-affinity
Date: Fri, 05 Oct 2012 16:08:23 +0200
Message-ID: <54bd1b01516d2e354b57.1349446103@Solace>
References: <patchbomb.1349446098@Solace>
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Cc: Andre Przywara <andre.przywara@amd.com>, Ian Campbell <Ian.Campbell@citrix.com>, Anil Madhavapeddy <anil@recoil.org>, George Dunlap <george.dunlap@eu.citrix.com>, Andrew Cooper <Andrew.Cooper3@citrix.com>, Juergen Gross <juergen.gross@ts.fujitsu.com>, Ian Jackson <Ian.Jackson@eu.citrix.com>, Jan Beulich <JBeulich@suse.com>, Marcus Granado <Marcus.Granado@eu.citrix.com>, Daniel De Graaf <dgdegra@tycho.nsa.gov>, Matt Wilson <msw@amazon.com>
List-Id: xen-devel@lists.xenproject.org

By providing the proper get/set interface and wiring them
to the new domctl-s from the previous commit.

Signed-off-by: Dario Faggioli <dario.faggioli@citrix.com>

diff --git a/tools/libxc/xc_domain.c b/tools/libxc/xc_domain.c
--- a/tools/libxc/xc_domain.c
+++ b/tools/libxc/xc_domain.c
@@ -110,6 +110,83 @@ int xc_domain_shutdown(xc_interface *xch
 }
 
 
+int xc_domain_node_setaffinity(xc_interface *xch,
+                               uint32_t domid,
+                               xc_nodemap_t nodemap)
+{
+    DECLARE_DOMCTL;
+    DECLARE_HYPERCALL_BUFFER(uint8_t, local);
+    int ret = -1;
+    int nodesize;
+
+    nodesize = xc_get_nodemap_size(xch);
+    if (!nodesize)
+    {
+        PERROR("Could not get number of nodes");
+        goto out;
+    }
+
+    local = xc_hypercall_buffer_alloc(xch, local, nodesize);
+    if ( local == NULL )
+    {
+        PERROR("Could not allocate memory for setnodeaffinity domctl hypercall");
+        goto out;
+    }
+
+    domctl.cmd = XEN_DOMCTL_setnodeaffinity;
+    domctl.domain = (domid_t)domid;
+
+    memcpy(local, nodemap, nodesize);
+    set_xen_guest_handle(domctl.u.nodeaffinity.nodemap.bitmap, local);
+    domctl.u.nodeaffinity.nodemap.nr_elems = nodesize * 8;
+
+    ret = do_domctl(xch, &domctl);
+
+    xc_hypercall_buffer_free(xch, local);
+
+ out:
+    return ret;
+}
+
+int xc_domain_node_getaffinity(xc_interface *xch,
+                               uint32_t domid,
+                               xc_nodemap_t nodemap)
+{
+    DECLARE_DOMCTL;
+    DECLARE_HYPERCALL_BUFFER(uint8_t, local);
+    int ret = -1;
+    int nodesize;
+
+    nodesize = xc_get_nodemap_size(xch);
+    if (!nodesize)
+    {
+        PERROR("Could not get number of nodes");
+        goto out;
+    }
+
+    local = xc_hypercall_buffer_alloc(xch, local, nodesize);
+    if ( local == NULL )
+    {
+        PERROR("Could not allocate memory for getnodeaffinity domctl hypercall");
+        goto out;
+    }
+
+    domctl.cmd = XEN_DOMCTL_getnodeaffinity;
+    domctl.domain = (domid_t)domid;
+
+    set_xen_guest_handle(domctl.u.nodeaffinity.nodemap.bitmap, local);
+    domctl.u.nodeaffinity.nodemap.nr_elems = nodesize * 8;
+
+    ret = do_domctl(xch, &domctl);
+
+    memcpy(nodemap, local, nodesize);
+
+    xc_hypercall_buffer_free(xch, local);
+
+ out:
+    return ret;
+}
+
 int xc_vcpu_setaffinity(xc_interface *xch,
                         uint32_t domid,
                         int vcpu,
diff --git a/tools/libxc/xenctrl.h b/tools/libxc/xenctrl.h
--- a/tools/libxc/xenctrl.h
+++ b/tools/libxc/xenctrl.h
@@ -521,6 +521,32 @@ int xc_watchdog(xc_interface *xch,
 		uint32_t id,
 		uint32_t timeout);
 
+/**
+ * This function explicitly sets the host NUMA nodes the domain will
+ * have affinity with.
+ *
+ * @parm xch a handle to an open hypervisor interface.
+ * @parm domid the domain id one wants to set the affinity of.
+ * @parm nodemap the map of the affine nodes.
+ * @return 0 on success, -1 on failure.
+ */
+int xc_domain_node_setaffinity(xc_interface *xch,
+                               uint32_t domind,
+                               xc_nodemap_t nodemap);
+
+/**
+ * This function retrieves the host NUMA nodes the domain has
+ * affinity with.
+ *
+ * @parm xch a handle to an open hypervisor interface.
+ * @parm domid the domain id one wants to get the node affinity of.
+ * @parm nodemap the map of the affine nodes.
+ * @return 0 on success, -1 on failure.
+ */
+int xc_domain_node_getaffinity(xc_interface *xch,
+                               uint32_t domind,
+                               xc_nodemap_t nodemap);
+
 int xc_vcpu_setaffinity(xc_interface *xch,
                         uint32_t domid,
                         int vcpu,