Merge remote-tracking branch 'ehabkost/tags/x86-and-machine-pull-request' into staging

x86 and machine queue, 2017-05-11

Highlights:
* New "-numa cpu" option
* NUMA distance configuration
* migration/i386 vmstatification

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# gpg: Good signature from "Eduardo Habkost <ehabkost@redhat.com>"
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* ehabkost/tags/x86-and-machine-pull-request: (29 commits)
  migration/i386: Remove support for pre-0.12 formats
  vmstatification: i386 FPReg
  migration/i386: Remove old non-softfloat 64bit FP support
  tests: check -numa node,cpu=props_list usecase
  numa: add '-numa cpu,...' option for property based node mapping
  numa: remove node_cpu bitmaps as they are no longer used
  numa: use possible_cpus for not mapped CPUs check
  machine: call machine init from wrapper
  numa: remove no longer need numa_post_machine_init()
  tests: numa: add case for QMP command query-cpus
  QMP: include CpuInstanceProperties into query_cpus output output
  virt-arm: get numa node mapping from possible_cpus instead of numa_get_node_for_cpu()
  spapr: get numa node mapping from possible_cpus instead of numa_get_node_for_cpu()
  pc: get numa node mapping from possible_cpus instead of numa_get_node_for_cpu()
  numa: do default mapping based on possible_cpus instead of node_cpu bitmaps
  numa: mirror cpu to node mapping in MachineState::possible_cpus
  numa: add check that board supports cpu_index to node mapping
  virt-arm: add node-id property to CPU
  pc: add node-id property to CPU
  spapr: add node-id property to sPAPR core
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

2 files changed, 47 insertions, 20 deletions

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 1b7cadab0c..0980d733cd 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -2831,9 +2831,11 @@ static void spapr_core_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
     MachineClass *mc = MACHINE_GET_CLASS(hotplug_dev);
     Error *local_err = NULL;
     CPUCore *cc = CPU_CORE(dev);
+    sPAPRCPUCore *sc = SPAPR_CPU_CORE(dev);
     char *base_core_type = spapr_get_cpu_core_type(machine->cpu_model);
     const char *type = object_get_typename(OBJECT(dev));
     CPUArchId *core_slot;
+    int node_id;
     int index;
 
     if (dev->hotplugged && !mc->has_hotpluggable_cpus) {
@@ -2868,6 +2870,21 @@ static void spapr_core_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
         goto out;
     }
 
+    node_id = core_slot->props.node_id;
+    if (!core_slot->props.has_node_id) {
+        /* by default CPUState::numa_node was 0 if it's not set via CLI
+         * keep it this way for now but in future we probably should
+         * refuse to start up with incomplete numa mapping */
+        node_id = 0;
+    }
+    if (sc->node_id == CPU_UNSET_NUMA_NODE_ID) {
+        sc->node_id = node_id;
+    } else if (sc->node_id != node_id) {
+        error_setg(&local_err, "node-id %d must match numa node specified"
+            "with -numa option for cpu-index %d", sc->node_id, cc->core_id);
+        goto out;
+    }
+
 out:
     g_free(base_core_type);
     error_propagate(errp, local_err);
@@ -2988,11 +3005,18 @@ static HotplugHandler *spapr_get_hotplug_handler(MachineState *machine,
     return NULL;
 }
 
-static unsigned spapr_cpu_index_to_socket_id(unsigned cpu_index)
+static CpuInstanceProperties
+spapr_cpu_index_to_props(MachineState *machine, unsigned cpu_index)
 {
-    /* Allocate to NUMA nodes on a "socket" basis (not that concept of
-     * socket means much for the paravirtualized PAPR platform) */
-    return cpu_index / smp_threads / smp_cores;
+    CPUArchId *core_slot;
+    MachineClass *mc = MACHINE_GET_CLASS(machine);
+
+    /* make sure possible_cpu are intialized */
+    mc->possible_cpu_arch_ids(machine);
+    /* get CPU core slot containing thread that matches cpu_index */
+    core_slot = spapr_find_cpu_slot(machine, cpu_index, NULL);
+    assert(core_slot);
+    return core_slot->props;
 }
 
 static const CPUArchIdList *spapr_possible_cpu_arch_ids(MachineState *machine)
@@ -3019,8 +3043,15 @@ static const CPUArchIdList *spapr_possible_cpu_arch_ids(MachineState *machine)
         machine->possible_cpus->cpus[i].arch_id = core_id;
         machine->possible_cpus->cpus[i].props.has_core_id = true;
         machine->possible_cpus->cpus[i].props.core_id = core_id;
-        /* TODO: add 'has_node/node' here to describe
-           to which node core belongs */
+
+        /* default distribution of CPUs over NUMA nodes */
+        if (nb_numa_nodes) {
+            /* preset values but do not enable them i.e. 'has_node_id = false',
+             * numa init code will enable them later if manual mapping wasn't
+             * present on CLI */
+            machine->possible_cpus->cpus[i].props.node_id =
+                core_id / smp_threads / smp_cores % nb_numa_nodes;
+        }
     }
     return machine->possible_cpus;
 }
@@ -3145,7 +3176,7 @@ static void spapr_machine_class_init(ObjectClass *oc, void *data)
     hc->pre_plug = spapr_machine_device_pre_plug;
     hc->plug = spapr_machine_device_plug;
     hc->unplug = spapr_machine_device_unplug;
-    mc->cpu_index_to_socket_id = spapr_cpu_index_to_socket_id;
+    mc->cpu_index_to_instance_props = spapr_cpu_index_to_props;
     mc->possible_cpu_arch_ids = spapr_possible_cpu_arch_ids;
     hc->unplug_request = spapr_machine_device_unplug_request;
 
@@ -3249,6 +3280,7 @@ static void spapr_machine_2_9_class_options(MachineClass *mc)
 {
     spapr_machine_2_10_class_options(mc);
     SET_MACHINE_COMPAT(mc, SPAPR_COMPAT_2_9);
+    mc->numa_auto_assign_ram = numa_legacy_auto_assign_ram;
 }
 
 DEFINE_SPAPR_MACHINE(2_9, "2.9", false);
diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
index 4389ef4c2a..a17ea07ef1 100644
--- a/hw/ppc/spapr_cpu_core.c
+++ b/hw/ppc/spapr_cpu_core.c
@@ -176,13 +176,11 @@ static void spapr_cpu_core_realize(DeviceState *dev, Error **errp)
     const char *typename = object_class_get_name(scc->cpu_class);
     size_t size = object_type_get_instance_size(typename);
     Error *local_err = NULL;
-    int core_node_id = numa_get_node_for_cpu(cc->core_id);;
     void *obj;
     int i, j;
 
     sc->threads = g_malloc0(size * cc->nr_threads);
     for (i = 0; i < cc->nr_threads; i++) {
-        int node_id;
         char id[32];
         CPUState *cs;
 
@@ -192,17 +190,8 @@ static void spapr_cpu_core_realize(DeviceState *dev, Error **errp)
         cs = CPU(obj);
         cs->cpu_index = cc->core_id + i;
 
-        /* Set NUMA node for the added CPUs  */
-        node_id = numa_get_node_for_cpu(cs->cpu_index);
-        if (node_id != core_node_id) {
-            error_setg(&local_err, "Invalid node-id=%d of thread[cpu-index: %d]"
-                " on CPU[core-id: %d, node-id: %d], node-id must be the same",
-                 node_id, cs->cpu_index, cc->core_id, core_node_id);
-            goto err;
-        }
-        if (node_id < nb_numa_nodes) {
-            cs->numa_node = node_id;
-        }
+        /* Set NUMA node for the threads belonged to core  */
+        cs->numa_node = sc->node_id;
 
         snprintf(id, sizeof(id), "thread[%d]", i);
         object_property_add_child(OBJECT(sc), id, obj, &local_err);
@@ -263,6 +252,11 @@ static const char *spapr_core_models[] = {
     "POWER9_v1.0",
 };
 
+static Property spapr_cpu_core_properties[] = {
+    DEFINE_PROP_INT32("node-id", sPAPRCPUCore, node_id, CPU_UNSET_NUMA_NODE_ID),
+    DEFINE_PROP_END_OF_LIST()
+};
+
 void spapr_cpu_core_class_init(ObjectClass *oc, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
@@ -270,6 +264,7 @@ void spapr_cpu_core_class_init(ObjectClass *oc, void *data)
 
     dc->realize = spapr_cpu_core_realize;
     dc->unrealize = spapr_cpu_core_unrealizefn;
+    dc->props = spapr_cpu_core_properties;
     scc->cpu_class = cpu_class_by_name(TYPE_POWERPC_CPU, data);
     g_assert(scc->cpu_class);
 }