[PATCH 02/10] numa: introduce MachineClass::forbid_asymmetrical_numa

[Daniel Henrique Barboza]

The pSeries machine does not support asymmetrical NUMA configurations.

CC: Eduardo Habkost <ehabkost@redhat.com>
CC: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
---
 hw/core/numa.c      | 7 +++++++
 hw/ppc/spapr.c      | 1 +
 include/hw/boards.h | 1 +
 3 files changed, 9 insertions(+)

diff --git a/hw/core/numa.c b/hw/core/numa.c
index d1a94a14f8..1e81233c1d 100644
--- a/hw/core/numa.c
+++ b/hw/core/numa.c
@@ -547,6 +547,7 @@ static int parse_numa(void *opaque, QemuOpts *opts, Error 
**errp)
  */
 static void validate_numa_distance(MachineState *ms)
 {
+    MachineClass *mc = MACHINE_GET_CLASS(ms);
     int src, dst;
     bool is_asymmetrical = false;
     int nb_numa_nodes = ms->numa_state->num_nodes;
@@ -575,6 +576,12 @@ static void validate_numa_distance(MachineState *ms)
     }
 
     if (is_asymmetrical) {
+        if (mc->forbid_asymmetrical_numa) {
+            error_report("This machine type does not support "
+                         "asymmetrical numa distances.");
+            exit(EXIT_FAILURE);
+        }
+
         for (src = 0; src < nb_numa_nodes; src++) {
             for (dst = 0; dst < nb_numa_nodes; dst++) {
                 if (src != dst && numa_info[src].distance[dst] == 0) {
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index dd2fa4826b..3b16edaf4c 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -4512,6 +4512,7 @@ static void spapr_machine_class_init(ObjectClass *oc, 
void *data)
      */
     mc->numa_mem_align_shift = 28;
     mc->auto_enable_numa = true;
+    mc->forbid_asymmetrical_numa = true;
 
     smc->default_caps.caps[SPAPR_CAP_HTM] = SPAPR_CAP_OFF;
     smc->default_caps.caps[SPAPR_CAP_VSX] = SPAPR_CAP_ON;
diff --git a/include/hw/boards.h b/include/hw/boards.h
index bc5b82ad20..dc6cdd1c53 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -215,6 +215,7 @@ struct MachineClass {
     bool nvdimm_supported;
     bool numa_mem_supported;
     bool auto_enable_numa;
+    bool forbid_asymmetrical_numa;
     const char *default_ram_id;
 
     HotplugHandler *(*get_hotplug_handler)(MachineState *machine,
-- 
2.26.2