[PATCH v6 13/17] xen/arm: implement numa_node_to_arch_nid for device tree NUMA

[Henry Wang <Henry.Wang@xxxxxxx>]

From: Wei Chen <wei.chen@xxxxxxx>

Device tree based NUMA doesn't have the proximity domain like
ACPI. So we can return node id directly as arch nid.

Signed-off-by: Wei Chen <wei.chen@xxxxxxx>
Signed-off-by: Henry Wang <Henry.Wang@xxxxxxx>
---
v5 -> v6:
- Rebase on top of staging without code changes.
v1 -> v5:
- Use numa_node_to_arch_nid instead of dummy node_to_pxm.
---
 xen/arch/arm/include/asm/numa.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/xen/arch/arm/include/asm/numa.h b/xen/arch/arm/include/asm/numa.h
index 55ac4665db..71b95a9a62 100644
--- a/xen/arch/arm/include/asm/numa.h
+++ b/xen/arch/arm/include/asm/numa.h
@@ -47,6 +47,15 @@ extern void numa_detect_cpu_node(unsigned int cpu);
 extern int numa_device_tree_init(const void *fdt);
 extern void numa_init(void);
 
+/*
+ * Device tree NUMA doesn't have architecural node id.
+ * So we can just return node id as arch nid.
+ */
+static inline unsigned int numa_node_to_arch_nid(nodeid_t n)
+{
+    return n;
+}
+
 #else
 
 /* Fake one node for now. See also node_online_map. */
-- 
2.25.1