diff options
Diffstat (limited to 'arch/x86/kernel/smpboot.c')
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 6b087ab6cd8f..56078d61c793 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -86,6 +86,7 @@ void *x86_bios_cpu_apicid_early_ptr; #ifdef CONFIG_X86_32 u8 apicid_2_node[MAX_APICID]; +static int low_mappings; #endif /* State of each CPU */ @@ -326,6 +327,12 @@ static void __cpuinit start_secondary(void *unused) enable_8259A_irq(0); } +#ifdef CONFIG_X86_32 + while (low_mappings) + cpu_relax(); + __flush_tlb_all(); +#endif + /* This must be done before setting cpu_online_map */ set_cpu_sibling_map(raw_smp_processor_id()); wmb(); @@ -1040,14 +1047,20 @@ int __cpuinit native_cpu_up(unsigned int cpu) #ifdef CONFIG_X86_32 /* init low mem mapping */ clone_pgd_range(swapper_pg_dir, swapper_pg_dir + KERNEL_PGD_BOUNDARY, - min_t(unsigned long, KERNEL_PGD_PTRS, KERNEL_PGD_BOUNDARY)); + min_t(unsigned long, KERNEL_PGD_PTRS, KERNEL_PGD_BOUNDARY)); flush_tlb_all(); -#endif + low_mappings = 1; + + err = do_boot_cpu(apicid, cpu); + zap_low_mappings(); + low_mappings = 0; +#else err = do_boot_cpu(apicid, cpu); - if (err < 0) { +#endif + if (err) { Dprintk("do_boot_cpu failed %d\n", err); - return err; + return -EIO; } /* @@ -1177,6 +1190,7 @@ static void __init smp_cpu_index_default(void) */ void __init native_smp_prepare_cpus(unsigned int max_cpus) { + preempt_disable(); nmi_watchdog_default(); smp_cpu_index_default(); current_cpu_data = boot_cpu_data; @@ -1193,7 +1207,7 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus) if (smp_sanity_check(max_cpus) < 0) { printk(KERN_INFO "SMP disabled\n"); disable_smp(); - return; + goto out; } preempt_disable(); @@ -1233,6 +1247,8 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus) printk(KERN_INFO "CPU%d: ", 0); print_cpu_info(&cpu_data(0)); setup_boot_clock(); +out: + preempt_enable(); } /* * Early setup to make printk work. @@ -1259,9 +1275,6 @@ void __init native_smp_cpus_done(unsigned int max_cpus) setup_ioapic_dest(); #endif check_nmi_watchdog(); -#ifdef CONFIG_X86_32 - zap_low_mappings(); -#endif } #ifdef CONFIG_HOTPLUG_CPU |