devicetree/bindings/numa.txt

6 1 - Introduction
18 2 - numa-node-id
23 a node id is a 32-bit integer.
26 numa-node-id property which contains the node id of the device.
30 	numa-node-id = <0>;
32 	/* numa node 1 */
33 	numa-node-id = <1>;
36 3 - distance-map
39 The optional device tree node distance-map describes the relative
42 - compatible : Should at least contain "numa-distance-map-v1".
44 - distance-matrix
50 	1. Each entry represents distance from first node to second node.
55 	3. distance-matrix should have entries in lexicographical ascending
57 	4. There must be only one device node distance-map which must
59 	5. If the distance-map node is not present, a default
60 	distance-matrix is used.
76 	      0 -> 1 = 20
77 	      1 -> 2 = 20
78 	      2 -> 3 = 20
79 	      3 -> 0 = 20
80 	      0 -> 2 = 40
81 	      1 -> 3 = 40
85 		distance-map {
86 			 compatible = "numa-distance-map-v1";
87 			 distance-matrix = <0 0  10>,
88 					   <0 1  20>,
91 					   <1 0  20>,
92 					   <1 1  10>,
93 					   <1 2  20>,
94 					   <1 3  40>,
96 					   <2 1  20>,
100 					   <3 1  40>,
106 4 - Example dts
116 		numa-node-id = <0>;
122 		/* node 1 */
123 		numa-node-id = <1>;
127 		#address-cells = <2>;
128 		#size-cells = <0>;
134 			enable-method = "psci";
136 			numa-node-id = <0>;
138 		cpu@1 {
142 			enable-method = "psci";
143 			numa-node-id = <0>;
149 			enable-method = "psci";
150 			numa-node-id = <0>;
156 			enable-method = "psci";
157 			numa-node-id = <0>;
163 			enable-method = "psci";
164 			numa-node-id = <0>;
170 			enable-method = "psci";
171 			numa-node-id = <0>;
177 			enable-method = "psci";
178 			numa-node-id = <0>;
184 			enable-method = "psci";
185 			numa-node-id = <0>;
191 			enable-method = "psci";
192 			/* node 1 */
193 			numa-node-id = <1>;
199 			enable-method = "psci";
200 			numa-node-id = <1>;
206 			enable-method = "psci";
207 			numa-node-id = <1>;
213 			enable-method = "psci";
214 			numa-node-id = <1>;
220 			enable-method = "psci";
221 			numa-node-id = <1>;
227 			enable-method = "psci";
228 			numa-node-id = <1>;
234 			enable-method = "psci";
235 			numa-node-id = <1>;
241 			enable-method = "psci";
242 			numa-node-id = <1>;
249 		bus-range = <0 255>;
250 		#size-cells = <2>;
251 		#address-cells = <3>;
255 		numa-node-id = <0>;
261 		bus-range = <0 255>;
262 		#size-cells = <2>;
263 		#address-cells = <3>;
266 		/* node 1 */
267 		numa-node-id = <1>;
270 	distance-map {
271 		compatible = "numa-distance-map-v1";
272 		distance-matrix = <0 0 10>,
273 				  <0 1 20>,
274 				  <1 1 10>;