[PATCH v2 14/15] xen/asm-generic: introduce stub header numa.h

[Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>]

<asm/numa.h> is common through some archs so it is moved
to asm-generic.

Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
---
Changes in V2:
        - update the commit message.
        - change u8 to uint8_t.
        - add ifnded CONFIG_NUMA.
---
 xen/include/asm-generic/numa.h | 40 ++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 xen/include/asm-generic/numa.h

diff --git a/xen/include/asm-generic/numa.h b/xen/include/asm-generic/numa.h
new file mode 100644
index 0000000000..353642c353
--- /dev/null
+++ b/xen/include/asm-generic/numa.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef __ARCH_GENERIC_NUMA_H
+#define __ARCH_GENERIC_NUMA_H
+
+#include <xen/types.h>
+#include <xen/mm.h>
+
+typedef uint8_t nodeid_t;
+
+#ifndef CONFIG_NUMA
+
+/* Fake one node for now. See also node_online_map. */
+#define cpu_to_node(cpu) 0
+#define node_to_cpumask(node)   (cpu_online_map)
+
+/*
+ * TODO: make first_valid_mfn static when NUMA is supported on Arm, this
+ * is required because the dummy helpers are using it.
+ */
+extern mfn_t first_valid_mfn;
+
+/* XXX: implement NUMA support */
+#define node_spanned_pages(nid) (max_page - mfn_x(first_valid_mfn))
+#define node_start_pfn(nid) (mfn_x(first_valid_mfn))
+#define __node_distance(a, b) (20)
+
+#endif
+
+#define arch_want_default_dmazone() (false)
+
+#endif /* __ARCH_GENERIC_NUMA_H */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
-- 
2.41.0