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Diffstat (limited to 'arch/i386/kernel/smpboot.c')
-rw-r--r--arch/i386/kernel/smpboot.c72
1 files changed, 20 insertions, 52 deletions
diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c
index 1fb26d0e30b..5a2bbe0c4ff 100644
--- a/arch/i386/kernel/smpboot.c
+++ b/arch/i386/kernel/smpboot.c
@@ -87,7 +87,11 @@ EXPORT_SYMBOL(cpu_online_map);
cpumask_t cpu_callin_map;
cpumask_t cpu_callout_map;
EXPORT_SYMBOL(cpu_callout_map);
+#ifdef CONFIG_HOTPLUG_CPU
+cpumask_t cpu_possible_map = CPU_MASK_ALL;
+#else
cpumask_t cpu_possible_map;
+#endif
EXPORT_SYMBOL(cpu_possible_map);
static cpumask_t smp_commenced_mask;
@@ -1074,6 +1078,16 @@ void *xquad_portio;
EXPORT_SYMBOL(xquad_portio);
#endif
+/*
+ * Fall back to non SMP mode after errors.
+ *
+ */
+static __init void disable_smp(void)
+{
+ cpu_set(0, cpu_sibling_map[0]);
+ cpu_set(0, cpu_core_map[0]);
+}
+
static void __init smp_boot_cpus(unsigned int max_cpus)
{
int apicid, cpu, bit, kicked;
@@ -1086,7 +1100,6 @@ static void __init smp_boot_cpus(unsigned int max_cpus)
printk("CPU%d: ", 0);
print_cpu_info(&cpu_data[0]);
- boot_cpu_physical_apicid = GET_APIC_ID(apic_read(APIC_ID));
boot_cpu_logical_apicid = logical_smp_processor_id();
x86_cpu_to_apicid[0] = boot_cpu_physical_apicid;
@@ -1098,68 +1111,27 @@ static void __init smp_boot_cpus(unsigned int max_cpus)
cpus_clear(cpu_core_map[0]);
cpu_set(0, cpu_core_map[0]);
+ map_cpu_to_logical_apicid();
+
/*
* If we couldn't find an SMP configuration at boot time,
* get out of here now!
*/
if (!smp_found_config && !acpi_lapic) {
printk(KERN_NOTICE "SMP motherboard not detected.\n");
- smpboot_clear_io_apic_irqs();
- phys_cpu_present_map = physid_mask_of_physid(0);
- if (APIC_init_uniprocessor())
- printk(KERN_NOTICE "Local APIC not detected."
- " Using dummy APIC emulation.\n");
- map_cpu_to_logical_apicid();
- cpu_set(0, cpu_sibling_map[0]);
- cpu_set(0, cpu_core_map[0]);
+ disable_smp();
return;
}
/*
- * Should not be necessary because the MP table should list the boot
- * CPU too, but we do it for the sake of robustness anyway.
- * Makes no sense to do this check in clustered apic mode, so skip it
- */
- if (!check_phys_apicid_present(boot_cpu_physical_apicid)) {
- printk("weird, boot CPU (#%d) not listed by the BIOS.\n",
- boot_cpu_physical_apicid);
- physid_set(hard_smp_processor_id(), phys_cpu_present_map);
- }
-
- /*
- * If we couldn't find a local APIC, then get out of here now!
- */
- if (APIC_INTEGRATED(apic_version[boot_cpu_physical_apicid]) && !cpu_has_apic) {
- printk(KERN_ERR "BIOS bug, local APIC #%d not detected!...\n",
- boot_cpu_physical_apicid);
- printk(KERN_ERR "... forcing use of dummy APIC emulation. (tell your hw vendor)\n");
- smpboot_clear_io_apic_irqs();
- phys_cpu_present_map = physid_mask_of_physid(0);
- cpu_set(0, cpu_sibling_map[0]);
- cpu_set(0, cpu_core_map[0]);
- return;
- }
-
- verify_local_APIC();
-
- /*
* If SMP should be disabled, then really disable it!
*/
- if (!max_cpus) {
- smp_found_config = 0;
- printk(KERN_INFO "SMP mode deactivated, forcing use of dummy APIC emulation.\n");
- smpboot_clear_io_apic_irqs();
- phys_cpu_present_map = physid_mask_of_physid(0);
- cpu_set(0, cpu_sibling_map[0]);
- cpu_set(0, cpu_core_map[0]);
+ if (!max_cpus || (enable_local_apic < 0)) {
+ printk(KERN_INFO "SMP mode deactivated.\n");
+ disable_smp();
return;
}
- connect_bsp_APIC();
- setup_local_APIC();
- map_cpu_to_logical_apicid();
-
-
setup_portio_remap();
/*
@@ -1240,10 +1212,6 @@ static void __init smp_boot_cpus(unsigned int max_cpus)
cpu_set(0, cpu_sibling_map[0]);
cpu_set(0, cpu_core_map[0]);
- smpboot_setup_io_apic();
-
- setup_boot_APIC_clock();
-
/*
* Synchronize the TSC with the AP
*/