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authorDavid Rientjes <rientjes@google.com>2009-09-25 15:20:04 -0700
committerIngo Molnar <mingo@elte.hu>2009-10-12 22:56:46 +0200
commit8716273caef7f55f39fe4fc6c69c5f9f197f41f1 (patch)
tree7008ec37e866a2f23207a4ef41f0319b567dc7e0 /arch/x86
parent8ee2debce32412118cf8c239e0026ace56ea1425 (diff)
x86: Export srat physical topology
This is the counterpart to "x86: export k8 physical topology" for SRAT. It is not as invasive because the acpi code already seperates node setup into detection and registration steps, with the exception of registering e820 active regions in acpi_numa_memory_affinity_init(). This is now moved to acpi_scan_nodes() if NUMA emulation is disabled or deferred. acpi_numa_init() now returns a value which specifies whether an underlying SRAT was located. If so, that topology can be used by the emulation code to interleave emulated nodes over physical nodes or to register the nodes for ACPI. acpi_get_nodes() may now be used to export the srat physical topology of the machine for NUMA emulation. Signed-off-by: David Rientjes <rientjes@google.com> Cc: Andreas Herrmann <andreas.herrmann3@amd.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Ankita Garg <ankita@in.ibm.com> Cc: Len Brown <len.brown@intel.com> LKML-Reference: <alpine.DEB.1.00.0909251518580.14754@chino.kir.corp.google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/include/asm/acpi.h1
-rw-r--r--arch/x86/kernel/setup.c5
-rw-r--r--arch/x86/mm/numa_64.c4
-rw-r--r--arch/x86/mm/srat_64.c28
4 files changed, 27 insertions, 11 deletions
diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
index 4518dc50090..e3d4a0daff5 100644
--- a/arch/x86/include/asm/acpi.h
+++ b/arch/x86/include/asm/acpi.h
@@ -158,6 +158,7 @@ struct bootnode;
#ifdef CONFIG_ACPI_NUMA
extern int acpi_numa;
+extern int acpi_get_nodes(struct bootnode *physnodes);
extern int acpi_scan_nodes(unsigned long start, unsigned long end);
#define NR_NODE_MEMBLKS (MAX_NUMNODES*2)
extern void acpi_fake_nodes(const struct bootnode *fake_nodes,
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index fda0032c25c..f8914198270 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -938,11 +938,12 @@ void __init setup_arch(char **cmdline_p)
/*
* Parse SRAT to discover nodes.
*/
- acpi_numa_init();
+ acpi = acpi_numa_init();
#endif
#ifdef CONFIG_K8_NUMA
- k8 = !k8_numa_init(0, max_pfn);
+ if (!acpi)
+ k8 = !k8_numa_init(0, max_pfn);
#endif
initmem_init(0, max_pfn, acpi, k8);
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index dad5f42dd35..d1a3d94efc8 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -540,8 +540,8 @@ void __init initmem_init(unsigned long start_pfn, unsigned long last_pfn,
#endif
#ifdef CONFIG_ACPI_NUMA
- if (!numa_off && !acpi_scan_nodes(start_pfn << PAGE_SHIFT,
- last_pfn << PAGE_SHIFT))
+ if (!numa_off && acpi && !acpi_scan_nodes(start_pfn << PAGE_SHIFT,
+ last_pfn << PAGE_SHIFT))
return;
nodes_clear(node_possible_map);
nodes_clear(node_online_map);
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index dbb5381f7b3..891cbe65b2d 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -290,8 +290,6 @@ acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
printk(KERN_INFO "SRAT: Node %u PXM %u %lx-%lx\n", node, pxm,
start, end);
- e820_register_active_regions(node, start >> PAGE_SHIFT,
- end >> PAGE_SHIFT);
if (ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE) {
update_nodes_add(node, start, end);
@@ -338,6 +336,19 @@ static int __init nodes_cover_memory(const struct bootnode *nodes)
void __init acpi_numa_arch_fixup(void) {}
+int __init acpi_get_nodes(struct bootnode *physnodes)
+{
+ int i;
+ int ret = 0;
+
+ for_each_node_mask(i, nodes_parsed) {
+ physnodes[ret].start = nodes[i].start;
+ physnodes[ret].end = nodes[i].end;
+ ret++;
+ }
+ return ret;
+}
+
/* Use the information discovered above to actually set up the nodes. */
int __init acpi_scan_nodes(unsigned long start, unsigned long end)
{
@@ -350,11 +361,6 @@ int __init acpi_scan_nodes(unsigned long start, unsigned long end)
for (i = 0; i < MAX_NUMNODES; i++)
cutoff_node(i, start, end);
- if (!nodes_cover_memory(nodes)) {
- bad_srat();
- return -1;
- }
-
memnode_shift = compute_hash_shift(node_memblk_range, num_node_memblks,
memblk_nodeid);
if (memnode_shift < 0) {
@@ -364,6 +370,14 @@ int __init acpi_scan_nodes(unsigned long start, unsigned long end)
return -1;
}
+ for_each_node_mask(i, nodes_parsed)
+ e820_register_active_regions(i, nodes[i].start >> PAGE_SHIFT,
+ nodes[i].end >> PAGE_SHIFT);
+ if (!nodes_cover_memory(nodes)) {
+ bad_srat();
+ return -1;
+ }
+
/* Account for nodes with cpus and no memory */
nodes_or(node_possible_map, nodes_parsed, cpu_nodes_parsed);