numa: make sure that all cpus have has_node_id set if numa is enabled

It fixes/add missing _PXM object for non mapped CPU (x86)
and missing fdt node (virt-arm).

It ensures that possible_cpus contains complete mapping if
numa is enabled by the time machine_init() is executed.

As result non completely mapped CPUs:
 1) appear in ACPI/fdt blobs
 2) QMP query-hotpluggable-cpus command shows bound nodes for such CPUs
 3) allows to drop checks for has_node_id in numa only code,
   reducing number of invariants incomplete mapping could produce
 4) moves fixup/implicit node init from runtime numa_cpu_pre_plug()
   (when CPU object is created) to machine_numa_finish_init() which
   helps to fix [1, 2] and make possible_cpus complete source
   of numa mapping available even before CPUs are created.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <1496161442-96665-4-git-send-email-imammedo@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

1 files changed, 5 insertions, 11 deletions

diff --git a/numa.c b/numa.c
index 4ec3eaf687..65701cb6c8 100644
--- a/numa.c
+++ b/numa.c
@@ -509,22 +509,16 @@ void parse_numa_opts(MachineState *ms)
 
 void numa_cpu_pre_plug(const CPUArchId *slot, DeviceState *dev, Error **errp)
 {
-    int mapped_node_id; /* set by -numa option */
     int node_id = object_property_get_int(OBJECT(dev), "node-id", &error_abort);
 
-    /* by default CPUState::numa_node was 0 if it wasn't set explicitly
-     * TODO: make it error when incomplete numa mapping support is removed
-     */
-    mapped_node_id = slot->props.node_id;
-    if (!slot->props.has_node_id) {
-        mapped_node_id = 0;
-    }
-
     if (node_id == CPU_UNSET_NUMA_NODE_ID) {
         /* due to bug in libvirt, it doesn't pass node-id from props on
          * device_add as expected, so we have to fix it up here */
-        object_property_set_int(OBJECT(dev), mapped_node_id, "node-id", errp);
-    } else if (node_id != mapped_node_id) {
+        if (slot->props.has_node_id) {
+            object_property_set_int(OBJECT(dev), slot->props.node_id,
+                                    "node-id", errp);
+        }
+    } else if (node_id != slot->props.node_id) {
         error_setg(errp, "node-id=%d must match numa node specified "
                    "with -numa option", node_id);
     }