diff options
Diffstat (limited to 'arch/x86/kernel/smpboot.c')
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 120 |
1 files changed, 44 insertions, 76 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index ad59edd84de7..5f59e6bee123 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -77,6 +77,7 @@ #include <asm/i8259.h> #include <asm/realmode.h> #include <asm/misc.h> +#include <asm/qspinlock.h> /* Number of siblings per CPU package */ int smp_num_siblings = 1; @@ -194,6 +195,12 @@ static void smp_callin(void) smp_store_cpu_info(cpuid); /* + * The topology information must be up to date before + * calibrate_delay() and notify_cpu_starting(). + */ + set_cpu_sibling_map(raw_smp_processor_id()); + + /* * Get our bogomips. * Update loops_per_jiffy in cpu_data. Previous call to * smp_store_cpu_info() stored a value that is close but not as @@ -203,11 +210,6 @@ static void smp_callin(void) cpu_data(cpuid).loops_per_jiffy = loops_per_jiffy; pr_debug("Stack at about %p\n", &cpuid); - /* - * This must be done before setting cpu_online_mask - * or calling notify_cpu_starting. - */ - set_cpu_sibling_map(raw_smp_processor_id()); wmb(); notify_cpu_starting(cpuid); @@ -249,19 +251,19 @@ static void notrace start_secondary(void *unused) /* otherwise gcc will move up smp_processor_id before the cpu_init */ barrier(); /* - * Check TSC synchronization with the BP: + * Check TSC synchronization with the boot CPU: */ check_tsc_sync_target(); /* - * Lock vector_lock and initialize the vectors on this cpu - * before setting the cpu online. We must set it online with - * vector_lock held to prevent a concurrent setup/teardown - * from seeing a half valid vector space. + * Lock vector_lock, set CPU online and bring the vector + * allocator online. Online must be set with vector_lock held + * to prevent a concurrent irq setup/teardown from seeing a + * half valid vector space. */ lock_vector_lock(); - setup_vector_irq(smp_processor_id()); set_cpu_online(smp_processor_id(), true); + lapic_online(); unlock_vector_lock(); cpu_set_state_online(smp_processor_id()); x86_platform.nmi_init(); @@ -961,8 +963,7 @@ void common_cpu_up(unsigned int cpu, struct task_struct *idle) #ifdef CONFIG_X86_32 /* Stack for startup_32 can be just as for start_secondary onwards */ irq_ctx_init(cpu); - per_cpu(cpu_current_top_of_stack, cpu) = - (unsigned long)task_stack_page(idle) + THREAD_SIZE; + per_cpu(cpu_current_top_of_stack, cpu) = task_top_of_stack(idle); #else initial_gs = per_cpu_offset(cpu); #endif @@ -1094,7 +1095,7 @@ int native_cpu_up(unsigned int cpu, struct task_struct *tidle) unsigned long flags; int err, ret = 0; - WARN_ON(irqs_disabled()); + lockdep_assert_irqs_enabled(); pr_debug("++++++++++++++++++++=_---CPU UP %u\n", cpu); @@ -1190,17 +1191,10 @@ static __init void disable_smp(void) cpumask_set_cpu(0, topology_core_cpumask(0)); } -enum { - SMP_OK, - SMP_NO_CONFIG, - SMP_NO_APIC, - SMP_FORCE_UP, -}; - /* * Various sanity checks. */ -static int __init smp_sanity_check(unsigned max_cpus) +static void __init smp_sanity_check(void) { preempt_disable(); @@ -1238,16 +1232,6 @@ static int __init smp_sanity_check(unsigned max_cpus) } /* - * If we couldn't find an SMP configuration at boot time, - * get out of here now! - */ - if (!smp_found_config && !acpi_lapic) { - preempt_enable(); - pr_notice("SMP motherboard not detected\n"); - return SMP_NO_CONFIG; - } - - /* * Should not be necessary because the MP table should list the boot * CPU too, but we do it for the sake of robustness anyway. */ @@ -1257,29 +1241,6 @@ static int __init smp_sanity_check(unsigned max_cpus) physid_set(hard_smp_processor_id(), phys_cpu_present_map); } preempt_enable(); - - /* - * If we couldn't find a local APIC, then get out of here now! - */ - if (APIC_INTEGRATED(boot_cpu_apic_version) && - !boot_cpu_has(X86_FEATURE_APIC)) { - if (!disable_apic) { - pr_err("BIOS bug, local APIC #%d not detected!...\n", - boot_cpu_physical_apicid); - pr_err("... forcing use of dummy APIC emulation (tell your hw vendor)\n"); - } - return SMP_NO_APIC; - } - - /* - * If SMP should be disabled, then really disable it! - */ - if (!max_cpus) { - pr_info("SMP mode deactivated\n"); - return SMP_FORCE_UP; - } - - return SMP_OK; } static void __init smp_cpu_index_default(void) @@ -1294,9 +1255,18 @@ static void __init smp_cpu_index_default(void) } } +static void __init smp_get_logical_apicid(void) +{ + if (x2apic_mode) + cpu0_logical_apicid = apic_read(APIC_LDR); + else + cpu0_logical_apicid = GET_APIC_LOGICAL_ID(apic_read(APIC_LDR)); +} + /* - * Prepare for SMP bootup. The MP table or ACPI has been read - * earlier. Just do some sanity checking here and enable APIC mode. + * Prepare for SMP bootup. + * @max_cpus: configured maximum number of CPUs, It is a legacy parameter + * for common interface support. */ void __init native_smp_prepare_cpus(unsigned int max_cpus) { @@ -1328,35 +1298,33 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus) set_cpu_sibling_map(0); - switch (smp_sanity_check(max_cpus)) { - case SMP_NO_CONFIG: - disable_smp(); - if (APIC_init_uniprocessor()) - pr_notice("Local APIC not detected. Using dummy APIC emulation.\n"); - return; - case SMP_NO_APIC: + smp_sanity_check(); + + switch (apic_intr_mode) { + case APIC_PIC: + case APIC_VIRTUAL_WIRE_NO_CONFIG: disable_smp(); return; - case SMP_FORCE_UP: + case APIC_SYMMETRIC_IO_NO_ROUTING: disable_smp(); - apic_bsp_setup(false); + /* Setup local timer */ + x86_init.timers.setup_percpu_clockev(); return; - case SMP_OK: + case APIC_VIRTUAL_WIRE: + case APIC_SYMMETRIC_IO: break; } - if (read_apic_id() != boot_cpu_physical_apicid) { - panic("Boot APIC ID in local APIC unexpected (%d vs %d)", - read_apic_id(), boot_cpu_physical_apicid); - /* Or can we switch back to PIC here? */ - } + /* Setup local timer */ + x86_init.timers.setup_percpu_clockev(); - default_setup_apic_routing(); - cpu0_logical_apicid = apic_bsp_setup(false); + smp_get_logical_apicid(); pr_info("CPU0: "); print_cpu_info(&cpu_data(0)); + native_pv_lock_init(); + uv_system_init(); set_mtrr_aps_delayed_init(); @@ -1395,7 +1363,6 @@ void __init native_smp_cpus_done(unsigned int max_cpus) nmi_selftest(); impress_friends(); - setup_ioapic_dest(); mtrr_aps_init(); } @@ -1554,13 +1521,14 @@ void cpu_disable_common(void) remove_cpu_from_maps(cpu); unlock_vector_lock(); fixup_irqs(); + lapic_offline(); } int native_cpu_disable(void) { int ret; - ret = check_irq_vectors_for_cpu_disable(); + ret = lapic_can_unplug_cpu(); if (ret) return ret; |