[Xen-changelog] [xen master] libxc: allow for explicitly specifying node-affinity

[patchbot@xxxxxxx]

commit 02ec52272f08f9beb44454829046d7761dc0e655
Author:     Dario Faggioli <dario.faggioli@xxxxxxxxxx>
AuthorDate: Wed Apr 17 10:57:33 2013 +0000
Commit:     Ian Campbell <ian.campbell@xxxxxxxxxx>
CommitDate: Wed Apr 17 12:11:14 2013 +0100

    libxc: allow for explicitly specifying node-affinity
    
    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@xxxxxxxxxx>
    Acked-by: Juergen Gross <juergen.gross@xxxxxxxxxxxxxx>
    Acked-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
---
 tools/libxc/xc_domain.c |   77 +++++++++++++++++++++++++++++++++++++++++++++++
 tools/libxc/xenctrl.h   |   26 ++++++++++++++++
 2 files changed, 103 insertions(+), 0 deletions(-)

diff --git a/tools/libxc/xc_domain.c b/tools/libxc/xc_domain.c
index 7842519..bb71cca 100644
--- 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_bits = 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_bits = 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
index d3185c6..54a2d5a 100644
--- a/tools/libxc/xenctrl.h
+++ b/tools/libxc/xenctrl.h
@@ -526,6 +526,32 @@ 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,
--
generated by git-patchbot for /home/xen/git/xen.git#master

_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxx
http://lists.xensource.com/xen-changelog