Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 80 insertions, 0 deletions

diff --git a/arch/ia64/mm/numa.c b/arch/ia64/mm/numa.c
new file mode 100644
index 0000000000..4c7b1f50e3
--- /dev/null
+++ b/arch/ia64/mm/numa.c
@@ -0,0 +1,80 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * This file contains NUMA specific variables and functions which are used on
+ * NUMA machines with contiguous memory.
+ * 
+ *                         2002/08/07 Erich Focht <efocht@ess.nec.de>
+ */
+
+#include <linux/cpu.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/node.h>
+#include <linux/init.h>
+#include <linux/memblock.h>
+#include <linux/module.h>
+#include <asm/mmzone.h>
+#include <asm/numa.h>
+
+
+/*
+ * The following structures are usually initialized by ACPI or
+ * similar mechanisms and describe the NUMA characteristics of the machine.
+ */
+int num_node_memblks;
+struct node_memblk_s node_memblk[NR_NODE_MEMBLKS];
+struct node_cpuid_s node_cpuid[NR_CPUS] =
+	{ [0 ... NR_CPUS-1] = { .phys_id = 0, .nid = NUMA_NO_NODE } };
+
+/*
+ * This is a matrix with "distances" between nodes, they should be
+ * proportional to the memory access latency ratios.
+ */
+u8 numa_slit[MAX_NUMNODES * MAX_NUMNODES];
+
+int __node_distance(int from, int to)
+{
+	return slit_distance(from, to);
+}
+EXPORT_SYMBOL(__node_distance);
+
+/* Identify which cnode a physical address resides on */
+int
+paddr_to_nid(unsigned long paddr)
+{
+	int	i;
+
+	for (i = 0; i < num_node_memblks; i++)
+		if (paddr >= node_memblk[i].start_paddr &&
+		    paddr < node_memblk[i].start_paddr + node_memblk[i].size)
+			break;
+
+	return (i < num_node_memblks) ? node_memblk[i].nid : (num_node_memblks ? -1 : 0);
+}
+EXPORT_SYMBOL(paddr_to_nid);
+
+#if defined(CONFIG_SPARSEMEM) && defined(CONFIG_NUMA)
+void numa_clear_node(int cpu)
+{
+	unmap_cpu_from_node(cpu, NUMA_NO_NODE);
+}
+
+#ifdef CONFIG_MEMORY_HOTPLUG
+/*
+ *  SRAT information is stored in node_memblk[], then we can use SRAT
+ *  information at memory-hot-add if necessary.
+ */
+
+int memory_add_physaddr_to_nid(u64 addr)
+{
+	int nid = paddr_to_nid(addr);
+	if (nid < 0)
+		return 0;
+	return nid;
+}
+EXPORT_SYMBOL(memory_add_physaddr_to_nid);
+#endif
+#endif