numa: Introduce MachineClass::auto_enable_numa for implicit NUMA node

Add MachineClass::auto_enable_numa field. When it is true, a NUMA node
is expected to be created implicitly.

Acked-by: David Gibson <david@gibson.dropbear.id.au>
Suggested-by: Igor Mammedov <imammedo@redhat.com>
Suggested-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Tao Xu <tao3.xu@intel.com>
Message-Id: <20190905083238.1799-1-tao3.xu@intel.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/hw/core/numa.c b/hw/core/numa.c
index 4dfec5c95b..038c96d4ab 100644
--- a/hw/core/numa.c
+++ b/hw/core/numa.c
@@ -378,11 +378,17 @@ void numa_complete_configuration(MachineState *ms)
      *   guest tries to use it with that drivers.
      *
      * Enable NUMA implicitly by adding a new NUMA node automatically.
+     *
+     * Or if MachineClass::auto_enable_numa is true and no NUMA nodes,
+     * assume there is just one node with whole RAM.
      */
-    if (ms->ram_slots > 0 && ms->numa_state->num_nodes == 0 &&
-        mc->auto_enable_numa_with_memhp) {
+    if (ms->numa_state->num_nodes == 0 &&
+        ((ms->ram_slots > 0 &&
+        mc->auto_enable_numa_with_memhp) ||
+        mc->auto_enable_numa)) {
             NumaNodeOptions node = { };
             parse_numa_node(ms, &node, &error_abort);
+            numa_info[0].node_mem = ram_size;
     }
 
     assert(max_numa_nodeid <= MAX_NODES);