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authorTejun Heo <tj@kernel.org>2011-05-02 14:18:53 +0200
committerTejun Heo <tj@kernel.org>2011-05-02 14:18:53 +0200
commitb0d310801a4c1f95b44357e4ebc22a9903e3bf3d (patch)
tree4a61939f1254967b88cfee59e6c3b450f70368c7 /arch
parente6df595b37c7c033ef7400b4fdd382a2dc4f4131 (diff)
x86-32, NUMA: implement temporary NUMA init shims
To help transition to common NUMA init, implement temporary 32bit shims for numa_add_memblk() and numa_set_distance(). numa_add_memblk() registers the memblk and adjusts node_start/end_pfn[]. numa_set_distance() is noop. These shims will allow using 64bit NUMA init functions on 32bit and gradual transition to common NUMA init path. For detailed description, please read description of commits which make use of the shim functions. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/include/asm/numa.h3
-rw-r--r--arch/x86/include/asm/numa_64.h3
-rw-r--r--arch/x86/mm/numa_32.c34
3 files changed, 37 insertions, 3 deletions
diff --git a/arch/x86/include/asm/numa.h b/arch/x86/include/asm/numa.h
index c24306cd150..db449c7d89b 100644
--- a/arch/x86/include/asm/numa.h
+++ b/arch/x86/include/asm/numa.h
@@ -21,6 +21,9 @@
extern s16 __apicid_to_node[MAX_LOCAL_APIC];
extern nodemask_t numa_nodes_parsed __initdata;
+extern int __init numa_add_memblk(int nodeid, u64 start, u64 end);
+extern void __init numa_set_distance(int from, int to, int distance);
+
static inline void set_apicid_to_node(int apicid, s16 node)
{
__apicid_to_node[apicid] = node;
diff --git a/arch/x86/include/asm/numa_64.h b/arch/x86/include/asm/numa_64.h
index e84113f8fff..506dd050ff3 100644
--- a/arch/x86/include/asm/numa_64.h
+++ b/arch/x86/include/asm/numa_64.h
@@ -15,9 +15,6 @@ extern unsigned long numa_free_all_bootmem(void);
*/
#define NODE_MIN_SIZE (4*1024*1024)
-extern int __init numa_add_memblk(int nodeid, u64 start, u64 end);
-extern void __init numa_set_distance(int from, int to, int distance);
-
#ifdef CONFIG_NUMA_EMU
#define FAKE_NODE_MIN_SIZE ((u64)32 << 20)
#define FAKE_NODE_MIN_HASH_MASK (~(FAKE_NODE_MIN_SIZE - 1UL))
diff --git a/arch/x86/mm/numa_32.c b/arch/x86/mm/numa_32.c
index abf1247a4c3..d0369a56f84 100644
--- a/arch/x86/mm/numa_32.c
+++ b/arch/x86/mm/numa_32.c
@@ -414,3 +414,37 @@ int memory_add_physaddr_to_nid(u64 addr)
EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
#endif
+/* temporary shim, will go away soon */
+int __init numa_add_memblk(int nid, u64 start, u64 end)
+{
+ unsigned long start_pfn = start >> PAGE_SHIFT;
+ unsigned long end_pfn = end >> PAGE_SHIFT;
+
+ printk(KERN_DEBUG "nid %d start_pfn %08lx end_pfn %08lx\n",
+ nid, start_pfn, end_pfn);
+
+ if (start >= (u64)max_pfn << PAGE_SHIFT) {
+ printk(KERN_INFO "Ignoring SRAT pfns: %08lx - %08lx\n",
+ start_pfn, end_pfn);
+ return 0;
+ }
+
+ node_set_online(nid);
+ memblock_x86_register_active_regions(nid, start_pfn,
+ min(end_pfn, max_pfn));
+
+ if (!node_has_online_mem(nid)) {
+ node_start_pfn[nid] = start_pfn;
+ node_end_pfn[nid] = end_pfn;
+ } else {
+ node_start_pfn[nid] = min(node_start_pfn[nid], start_pfn);
+ node_end_pfn[nid] = max(node_end_pfn[nid], end_pfn);
+ }
+ return 0;
+}
+
+/* temporary shim, will go away soon */
+void __init numa_set_distance(int from, int to, int distance)
+{
+ /* nada */
+}