5 files changed, 95 insertions, 24 deletions

diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
index b326fa99db5..8288daf72dc 100644
--- a/arch/x86/include/asm/acpi.h
+++ b/arch/x86/include/asm/acpi.h
@@ -193,11 +193,6 @@ extern int acpi_scan_nodes(unsigned long start, unsigned long end);
 extern void acpi_fake_nodes(const struct bootnode *fake_nodes,
                                    int num_nodes);
 #endif
-#else
-static inline void acpi_fake_nodes(const struct bootnode *fake_nodes,
-                                   int num_nodes)
-{
-}
 #endif /* CONFIG_ACPI_NUMA */
 
 #define acpi_unlazy_tlb(x)      leave_mm(x)
diff --git a/arch/x86/include/asm/amd_nb.h b/arch/x86/include/asm/amd_nb.h
index 9c16cde63f0..8f6192c1592 100644
--- a/arch/x86/include/asm/amd_nb.h
+++ b/arch/x86/include/asm/amd_nb.h
@@ -13,6 +13,7 @@ extern int amd_numa_init(unsigned long start_pfn, unsigned long end_pfn);
 extern int amd_scan_nodes(void);
 
 #ifdef CONFIG_NUMA_EMU
+extern void amd_fake_nodes(const struct bootnode *nodes, int nr_nodes);
 extern int amd_get_nodes(struct bootnode *nodes);
 #endif
 
diff --git a/arch/x86/mm/amdtopology_64.c b/arch/x86/mm/amdtopology_64.c
index fe050af614e..eb5cbb97b68 100644
--- a/arch/x86/mm/amdtopology_64.c
+++ b/arch/x86/mm/amdtopology_64.c
@@ -27,6 +27,7 @@
 #include <asm/amd_nb.h>
 
 static struct bootnode __initdata nodes[8];
+static unsigned char __initdata nodeids[8];
 static nodemask_t __initdata nodes_parsed = NODE_MASK_NONE;
 
 static __init int find_northbridge(void)
@@ -69,21 +70,6 @@ static __init void early_get_boot_cpu_id(void)
         early_init_lapic_mapping();
 }
 
-#ifdef CONFIG_NUMA_EMU
-int __init amd_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;
-}
-#endif /* CONFIG_NUMA_EMU */
-
 int __init amd_numa_init(unsigned long start_pfn, unsigned long end_pfn)
 {
         unsigned long start = PFN_PHYS(start_pfn);
@@ -116,7 +102,7 @@ int __init amd_numa_init(unsigned long start_pfn, unsigned long end_pfn)
                 base = read_pci_config(0, nb, 1, 0x40 + i*8);
                 limit = read_pci_config(0, nb, 1, 0x44 + i*8);
 
-                nodeid = limit & 7;
+                nodeids[i] = nodeid = limit & 7;
                 if ((base & 3) == 0) {
                         if (i < numnodes)
                                 pr_info("Skipping disabled node %d\n", i);
@@ -196,6 +182,79 @@ int __init amd_numa_init(unsigned long start_pfn, unsigned long end_pfn)
         return 0;
 }
 
+#ifdef CONFIG_NUMA_EMU
+static s16 fake_apicid_to_node[MAX_LOCAL_APIC] __initdata = {
+        [0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE
+};
+
+int __init amd_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;
+}
+
+static int __init find_node_by_addr(unsigned long addr)
+{
+        int ret = NUMA_NO_NODE;
+        int i;
+
+        for (i = 0; i < 8; i++)
+                if (addr >= nodes[i].start && addr < nodes[i].end) {
+                        ret = i;
+                        break;
+                }
+        return ret;
+}
+
+/*
+ * For NUMA emulation, fake proximity domain (_PXM) to node id mappings must be
+ * setup to represent the physical topology but reflect the emulated
+ * environment.  For each emulated node, the real node which it appears on is
+ * found and a fake pxm to nid mapping is created which mirrors the actual
+ * locality.  node_distance() then represents the correct distances between
+ * emulated nodes by using the fake acpi mappings to pxms.
+ */
+void __init amd_fake_nodes(const struct bootnode *nodes, int nr_nodes)
+{
+        unsigned int bits;
+        unsigned int cores;
+        unsigned int apicid_base = 0;
+        int i;
+
+        bits = boot_cpu_data.x86_coreid_bits;
+        cores = 1 << bits;
+        early_get_boot_cpu_id();
+        if (boot_cpu_physical_apicid > 0)
+                apicid_base = boot_cpu_physical_apicid;
+
+        for (i = 0; i < nr_nodes; i++) {
+                int index;
+                int nid;
+                int j;
+
+                nid = find_node_by_addr(nodes[i].start);
+                if (nid == NUMA_NO_NODE)
+                        continue;
+
+                index = nodeids[nid] << bits;
+                if (fake_apicid_to_node[index + apicid_base] == NUMA_NO_NODE)
+                        for (j = apicid_base; j < cores + apicid_base; j++)
+                                fake_apicid_to_node[index + j] = i;
+#ifdef CONFIG_ACPI_NUMA
+                __acpi_map_pxm_to_node(nid, i);
+#endif
+        }
+        memcpy(apicid_to_node, fake_apicid_to_node, sizeof(apicid_to_node));
+}
+#endif /* CONFIG_NUMA_EMU */
+
 int __init amd_scan_nodes(void)
 {
         unsigned int bits;
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index 7762a517d69..cc390f3a1bd 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -324,6 +324,24 @@ static int __init setup_physnodes(unsigned long start, unsigned long end,
         return ret;
 }
 
+static void __init fake_physnodes(int acpi, int amd, int nr_nodes)
+{
+        int i;
+
+        BUG_ON(acpi && amd);
+#ifdef CONFIG_ACPI_NUMA
+        if (acpi)
+                acpi_fake_nodes(nodes, nr_nodes);
+#endif
+#ifdef CONFIG_AMD_NUMA
+        if (amd)
+                amd_fake_nodes(nodes, nr_nodes);
+#endif
+        if (!acpi && !amd)
+                for (i = 0; i < nr_cpu_ids; i++)
+                        numa_set_node(i, 0);
+}
+
 /*
  * Setups up nid to range from addr to addr + size.  If the end
  * boundary is greater than max_addr, then max_addr is used instead.
@@ -595,7 +613,7 @@ static int __init numa_emulation(unsigned long start_pfn,
                                                 nodes[i].end >> PAGE_SHIFT);
                 setup_node_bootmem(i, nodes[i].start, nodes[i].end);
         }
-        acpi_fake_nodes(nodes, num_nodes);
+        fake_physnodes(acpi, amd, num_nodes);
         numa_init_array();
         return 0;
 }
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index 8241bf0f6eb..c48b443706c 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -497,8 +497,6 @@ void __init acpi_fake_nodes(const struct bootnode *fake_nodes, int num_nodes)
 {
         int i, j;
 
-        printk(KERN_INFO "Faking PXM affinity for fake nodes on real "
-                         "topology.\n");
         for (i = 0; i < num_nodes; i++) {
                 int nid, pxm;