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authorYinghai Lu <Yinghai.Lu@Sun.COM>2008-02-19 03:21:06 -0800
committerIngo Molnar <mingo@elte.hu>2008-04-26 23:41:04 +0200
commitcbf9bd603ab1fc4d2ecb1c6a4b7bd1cc50a7e82a (patch)
tree039f9c8fc4cab6e8894e1158fc6bf8a4251077e2 /arch
parent4cf19463745fad81ef2eed3e4e0038da5fd153f8 (diff)
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/acpi/boot.c70
-rw-r--r--arch/x86/mm/k8topology_64.c38
2 files changed, 107 insertions, 1 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 977ed5cdeaa..c49ebcc6c41 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 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);
}