[PATCH 1/4] Memory Add Fixes for ppc64
Mike Kravetz
kravetz at us.ibm.com
Sat Nov 5 10:18:00 EST 2005
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 */
More information about the Linuxppc64-dev
mailing list