[Qemu-devel] [RFC 09/13] numa: introduce '-numa cpu' cpu option

[Igor Mammedov]

It allows to specify mapping of a CPU to NUMA node on CLI.
Option should be repeated for each present/possible CPU.
Example for PC machine:
  -numa node,nodeid=0 -numa node,nodeid=1 \
  -numa cpu,socket-id=0,core-id=0,thread-id=0,node-id=0 \
  -numa cpu,socket-id=1,core-id=0,thread-id=0,node-id=1

Signed-off-by: Igor Mammedov <imamm...@redhat.com>
---
 include/sysemu/numa.h |  2 +-
 numa.c                | 30 +++++++++++++++++++++++++++---
 qapi-schema.json      |  3 ++-
 vl.c                  |  2 +-
 4 files changed, 31 insertions(+), 6 deletions(-)

diff --git a/include/sysemu/numa.h b/include/sysemu/numa.h
index b8015a5..d4b139e 100644
--- a/include/sysemu/numa.h
+++ b/include/sysemu/numa.h
@@ -24,7 +24,7 @@ typedef struct node_info {
 } NodeInfo;
 
 extern NodeInfo numa_info[MAX_NODES];
-void parse_numa_opts(MachineClass *mc);
+void parse_numa_opts(MachineState *ms);
 void query_numa_node_mem(uint64_t node_mem[]);
 extern QemuOptsList qemu_numa_opts;
 void numa_set_mem_node_id(ram_addr_t addr, uint64_t size, uint32_t node);
diff --git a/numa.c b/numa.c
index 5f68497..0164cd7 100644
--- a/numa.c
+++ b/numa.c
@@ -37,6 +37,8 @@
 #include "hw/mem/pc-dimm.h"
 #include "qemu/option.h"
 #include "qemu/config-file.h"
+#include "qapi/qobject-output-visitor.h"
+#include "qapi/qobject-input-visitor.h"
 
 QemuOptsList qemu_numa_opts = {
     .name = "numa",
@@ -213,11 +215,13 @@ static void numa_node_parse(NumaNodeOptions *node, 
QemuOpts *opts, Error **errp)
 
 static int parse_numa(void *opaque, QemuOpts *opts, Error **errp)
 {
+    Visitor *v;
     NumaOptions *object = NULL;
+    MachineState *ms = MACHINE(opaque);
     Error *err = NULL;
 
     {
-        Visitor *v = opts_visitor_new(opts);
+        v = opts_visitor_new(opts);
         visit_type_NumaOptions(v, NULL, &object, &err);
         visit_free(v);
     }
@@ -234,6 +238,25 @@ static int parse_numa(void *opaque, QemuOpts *opts, Error 
**errp)
         }
         nb_numa_nodes++;
         break;
+    case NUMA_OPTIONS_KIND_CPU: {
+        QObject *qobj;
+
+        v = qobject_output_visitor_new(&qobj);
+        visit_type_CpuInstanceProperties(v, "cpu", &object->u.cpu.data, &err);
+        visit_complete(v, &qobj);
+        visit_free(v);
+        if (err) {
+            goto end;
+        }
+        v = qobject_input_visitor_new(qobj, true);
+        object_property_set(OBJECT(ms), v, "cpu", &err);
+        visit_free(v);
+        qobject_decref(qobj);
+        if (err) {
+            goto end;
+        }
+        break;
+    }
     default:
         abort();
     }
@@ -293,15 +316,16 @@ static void validate_numa_cpus(void)
     g_free(seen_cpus);
 }
 
-void parse_numa_opts(MachineClass *mc)
+void parse_numa_opts(MachineState *ms)
 {
     int i;
+    MachineClass *mc = MACHINE_GET_CLASS(ms);
 
     for (i = 0; i < MAX_NODES; i++) {
         numa_info[i].node_cpu = bitmap_new(max_cpus);
     }
 
-    if (qemu_opts_foreach(qemu_find_opts("numa"), parse_numa, NULL, NULL)) {
+    if (qemu_opts_foreach(qemu_find_opts("numa"), parse_numa, ms, NULL)) {
         exit(1);
     }
 
diff --git a/qapi-schema.json b/qapi-schema.json
index ddc8783..69c059b 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -5543,7 +5543,8 @@
 ##
 { 'union': 'NumaOptions',
   'data': {
-    'node': 'NumaNodeOptions' }}
+    'node': 'NumaNodeOptions',
+    'cpu': 'CpuInstanceProperties' }}
 
 ##
 # @NumaNodeOptions:
diff --git a/vl.c b/vl.c
index afe40ce..d724523 100644
--- a/vl.c
+++ b/vl.c
@@ -4485,7 +4485,7 @@ int main(int argc, char **argv, char **envp)
     default_drive(default_floppy, snapshot, IF_FLOPPY, 0, FD_OPTS);
     default_drive(default_sdcard, snapshot, IF_SD, 0, SD_OPTS);
 
-    parse_numa_opts(machine_class);
+    parse_numa_opts(current_machine);
 
     if (qemu_opts_foreach(qemu_find_opts("mon"),
                           mon_init_func, NULL, NULL)) {
-- 
2.7.4