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>

2 files changed, 107 insertions, 1 deletions

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 977ed5cdeaa3..c49ebcc6c41e 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -771,6 +771,32 @@ static void __init acpi_register_lapic_address(unsigned long address)
                 boot_cpu_physical_apicid  = GET_APIC_ID(read_apic_id());
 }
 
+static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
+{
+        int count;
+
+        if (!cpu_has_apic)
+                return -ENODEV;
+
+        /*
+         * Note that the LAPIC address is obtained from the MADT (32-bit value)
+         * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
+         */
+
+        count =
+            acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
+                                  acpi_parse_lapic_addr_ovr, 0);
+        if (count < 0) {
+                printk(KERN_ERR PREFIX
+                       "Error parsing LAPIC address override entry\n");
+                return count;
+        }
+
+        acpi_register_lapic_address(acpi_lapic_addr);
+
+        return count;
+}
+
 static int __init acpi_parse_madt_lapic_entries(void)
 {
         int count;
@@ -901,6 +927,33 @@ static inline int acpi_parse_madt_ioapic_entries(void)
 }
 #endif  /* !CONFIG_X86_IO_APIC */
 
+static void __init early_acpi_process_madt(void)
+{
+#ifdef CONFIG_X86_LOCAL_APIC
+        int error;
+
+        if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
+
+                /*
+                 * Parse MADT LAPIC entries
+                 */
+                error = early_acpi_parse_madt_lapic_addr_ovr();
+                if (!error) {
+                        acpi_lapic = 1;
+                        smp_found_config = 1;
+                }
+                if (error == -EINVAL) {
+                        /*
+                         * Dell Precision Workstation 410, 610 come here.
+                         */
+                        printk(KERN_ERR PREFIX
+                               "Invalid BIOS MADT, disabling ACPI\n");
+                        disable_acpi();
+                }
+        }
+#endif
+}
+
 static void __init acpi_process_madt(void)
 {
 #ifdef CONFIG_X86_LOCAL_APIC
@@ -1233,6 +1286,23 @@ int __init acpi_boot_table_init(void)
         return 0;
 }
 
+int __init early_acpi_boot_init(void)
+{
+        /*
+         * If acpi_disabled, bail out
+         * One exception: acpi=ht continues far enough to enumerate LAPICs
+         */
+        if (acpi_disabled && !acpi_ht)
+                return 1;
+
+        /*
+         * Process the Multiple APIC Description Table (MADT), if present
+         */
+        early_acpi_process_madt();
+
+        return 0;
+}
+
 int __init acpi_boot_init(void)
 {
         /*
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);
                 }