[PATCH 1/4] Memory Add Fixes for ppc64

[Mike Kravetz]

Add the create_section_mapping() routine to create hptes for memory
sections dynamically added after system boot.

Signed-off-by: Mike Kravetz <kravetz at us.ibm.com>

diff -Naupr linux-2.6.14-git7/arch/powerpc/mm/hash_utils_64.c linux-2.6.14-git7.work/arch/powerpc/mm/hash_utils_64.c
--- linux-2.6.14-git7/arch/powerpc/mm/hash_utils_64.c	2005-11-04 21:21:05.000000000 +0000
+++ linux-2.6.14-git7.work/arch/powerpc/mm/hash_utils_64.c	2005-11-04 22:05:06.000000000 +0000
@@ -176,6 +176,15 @@ static unsigned long get_hashtable_size(
 	return pteg_count << 7;
 }
 
+#ifdef CONFIG_MEMORY_HOTPLUG
+void create_section_mapping(unsigned long start, unsigned long end)
+{
+	create_pte_mapping(start, end,
+		_PAGE_ACCESSED | _PAGE_COHERENT | PP_RWXX,
+		cur_cpu_spec->cpu_features & CPU_FTR_16M_PAGE ? 1 : 0);
+}
+#endif /* CONFIG_MEMORY_HOTPLUG */
+
 void __init htab_initialize(void)
 {
 	unsigned long table, htab_size_bytes;
diff -Naupr linux-2.6.14-git7/arch/powerpc/mm/mem.c linux-2.6.14-git7.work/arch/powerpc/mm/mem.c
--- linux-2.6.14-git7/arch/powerpc/mm/mem.c	2005-11-04 21:21:05.000000000 +0000
+++ linux-2.6.14-git7.work/arch/powerpc/mm/mem.c	2005-11-04 22:05:06.000000000 +0000
@@ -124,6 +124,9 @@ int __devinit add_memory(u64 start, u64 
 	unsigned long start_pfn = start >> PAGE_SHIFT;
 	unsigned long nr_pages = size >> PAGE_SHIFT;
 
+	start += KERNELBASE;
+	create_section_mapping(start, start + size);
+
 	/* this should work for most non-highmem platforms */
 	zone = pgdata->node_zones;
 
diff -Naupr linux-2.6.14-git7/include/asm-ppc64/sparsemem.h linux-2.6.14-git7.work/include/asm-ppc64/sparsemem.h
--- linux-2.6.14-git7/include/asm-ppc64/sparsemem.h	2005-10-28 00:02:08.000000000 +0000
+++ linux-2.6.14-git7.work/include/asm-ppc64/sparsemem.h	2005-11-04 22:05:06.000000000 +0000
@@ -11,6 +11,10 @@
 #define MAX_PHYSADDR_BITS       38
 #define MAX_PHYSMEM_BITS        36
 
+#ifdef CONFIG_MEMORY_HOTPLUG
+extern void create_section_mapping(unsigned long start, unsigned long end);
+#endif /* CONFIG_MEMORY_HOTPLUG */
+
 #endif /* CONFIG_SPARSEMEM */
 
 #endif /* _ASM_PPC64_SPARSEMEM_H */