numa: Allow setting NUMA distance for different NUMA nodes

This patch is going to add SLIT table support in QEMU, and provides
additional option `dist` for command `-numa` to allow user set vNUMA
distance by QEMU command.

With this patch, when a user wants to create a guest that contains
several vNUMA nodes and also wants to set distance among those nodes,
the QEMU command would like:

```
-numa node,nodeid=0,cpus=0 \
-numa node,nodeid=1,cpus=1 \
-numa node,nodeid=2,cpus=2 \
-numa node,nodeid=3,cpus=3 \
-numa dist,src=0,dst=1,val=21 \
-numa dist,src=0,dst=2,val=31 \
-numa dist,src=0,dst=3,val=41 \
-numa dist,src=1,dst=2,val=21 \
-numa dist,src=1,dst=3,val=31 \
-numa dist,src=2,dst=3,val=21 \
```

Signed-off-by: He Chen <he.chen@linux.intel.com>
Message-Id: <1493260558-20728-1-git-send-email-he.chen@linux.intel.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

1 files changed, 28 insertions, 2 deletions

diff --git a/qapi-schema.json b/qapi-schema.json
index 5728b7f363..f4eef33a44 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -5682,10 +5682,14 @@
 ##
 # @NumaOptionsType:
 #
+# @node: NUMA nodes configuration
+#
+# @dist: NUMA distance configuration (since 2.10)
+#
 # Since: 2.1
 ##
 { 'enum': 'NumaOptionsType',
-  'data': [ 'node' ] }
+  'data': [ 'node', 'dist' ] }
 
 ##
 # @NumaOptions:
@@ -5698,7 +5702,8 @@
   'base': { 'type': 'NumaOptionsType' },
   'discriminator': 'type',
   'data': {
-    'node': 'NumaNodeOptions' }}
+    'node': 'NumaNodeOptions',
+    'dist': 'NumaDistOptions' }}
 
 ##
 # @NumaNodeOptions:
@@ -5727,6 +5732,27 @@
    '*memdev': 'str' }}
 
 ##
+# @NumaDistOptions:
+#
+# Set the distance between 2 NUMA nodes.
+#
+# @src: source NUMA node.
+#
+# @dst: destination NUMA node.
+#
+# @val: NUMA distance from source node to destination node.
+#       When a node is unreachable from another node, set the distance
+#       between them to 255.
+#
+# Since: 2.10
+##
+{ 'struct': 'NumaDistOptions',
+  'data': {
+   'src': 'uint16',
+   'dst': 'uint16',
+   'val': 'uint8' }}
+
+##
 # @HostMemPolicy:
 #
 # Host memory policy types