acpi: get boot_cpu_id as early for k8_scan_nodes

[mingo@elte.hu: split from "x86_64: get boot_cpu_id as early for k8_scan_nodes]

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 37 insertions, 1 deletions

diff --git a/arch/x86/mm/k8topology_64.c b/arch/x86/mm/k8topology_64.c
index 86808e666f9c..1f476e477844 100644
--- a/arch/x86/mm/k8topology_64.c
+++ b/arch/x86/mm/k8topology_64.c
@@ -13,12 +13,15 @@
 #include <linux/nodemask.h>
 #include <asm/io.h>
 #include <linux/pci_ids.h>
+#include <linux/acpi.h>
 #include <asm/types.h>
 #include <asm/mmzone.h>
 #include <asm/proto.h>
 #include <asm/e820.h>
 #include <asm/pci-direct.h>
 #include <asm/numa.h>
+#include <asm/mpspec.h>
+#include <asm/apic.h>
 
 static __init int find_northbridge(void)
 {
@@ -44,6 +47,30 @@ static __init int find_northbridge(void)
         return -1;
 }
 
+static __init void early_get_boot_cpu_id(void)
+{
+        /*
+         * need to get boot_cpu_id so can use that to create apicid_to_node
+         * in k8_scan_nodes()
+         */
+        /*
+         * Find possible boot-time SMP configuration:
+         */
+        early_find_smp_config();
+#ifdef CONFIG_ACPI
+        /*
+         * Read APIC information from ACPI tables.
+         */
+        early_acpi_boot_init();
+#endif
+        /*
+         * get boot-time SMP configuration:
+         */
+        if (smp_found_config)
+                early_get_smp_config();
+        early_init_lapic_mapping();
+}
+
 int __init k8_scan_nodes(unsigned long start, unsigned long end)
 {
         unsigned long prevbase;
@@ -56,6 +83,7 @@ int __init k8_scan_nodes(unsigned long start, unsigned long end)
         unsigned cores;
         unsigned bits;
         int j;
+        unsigned apicid_base;
 
         if (!early_pci_allowed())
                 return -1;
@@ -174,11 +202,19 @@ int __init k8_scan_nodes(unsigned long start, unsigned long end)
         /* use the coreid bits from early_identify_cpu */
         bits = boot_cpu_data.x86_coreid_bits;
         cores = (1<<bits);
+        apicid_base = 0;
+        /* need to get boot_cpu_id early for system with apicid lifting */
+        early_get_boot_cpu_id();
+        if (boot_cpu_physical_apicid > 0) {
+                printk(KERN_INFO "BSP APIC ID: %02x\n",
+                                 boot_cpu_physical_apicid);
+                apicid_base = boot_cpu_physical_apicid;
+        }
 
         for (i = 0; i < 8; i++) {
                 if (nodes[i].start != nodes[i].end) {
                         nodeid = nodeids[i];
-                        for (j = 0; j < cores; j++)
+                        for (j = apicid_base; j < cores + apicid_base; j++)
                                 apicid_to_node[(nodeid << bits) + j] = i;
                         setup_node_bootmem(i, nodes[i].start, nodes[i].end);
                 }