diff options
Diffstat (limited to 'arch/x86/kernel/smpboot.c')
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 38 |
1 files changed, 22 insertions, 16 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 04c662ba18f..38988491c62 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 */ @@ -299,7 +300,7 @@ static void __cpuinit smp_callin(void) /* * Activate a secondary processor. */ -void __cpuinit start_secondary(void *unused) +static void __cpuinit start_secondary(void *unused) { /* * Don't put *anything* before cpu_init(), SMP booting is too @@ -326,6 +327,12 @@ 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; } /* @@ -1149,14 +1162,10 @@ static int __init smp_sanity_check(unsigned max_cpus) "forcing use of dummy APIC emulation.\n"); smpboot_clear_io_apic(); #ifdef CONFIG_X86_32 - if (nmi_watchdog == NMI_LOCAL_APIC) { - printk(KERN_INFO "activating minimal APIC for" - "NMI watchdog use.\n"); - connect_bsp_APIC(); - setup_local_APIC(); - end_local_APIC_setup(); - } + connect_bsp_APIC(); #endif + setup_local_APIC(); + end_local_APIC_setup(); return -1; } @@ -1263,9 +1272,6 @@ 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 @@ -1310,7 +1316,7 @@ static void remove_siblinginfo(int cpu) cpu_clear(cpu, cpu_sibling_setup_map); } -int additional_cpus __initdata = -1; +static int additional_cpus __initdata = -1; static __init int setup_additional_cpus(char *s) { |