From cbf9bd603ab1fc4d2ecb1c6a4b7bd1cc50a7e82a Mon Sep 17 00:00:00 2001
From: Yinghai Lu <Yinghai.Lu@Sun.COM>
Date: Tue, 19 Feb 2008 03:21:06 -0800
Subject: 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>
---
 arch/x86/mm/k8topology_64.c | 38 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 37 insertions(+), 1 deletion(-)

(limited to 'arch/x86/mm')

diff --git a/arch/x86/mm/k8topology_64.c b/arch/x86/mm/k8topology_64.c
index 86808e666f9..1f476e47784 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);
 		}
-- 
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