diff options
Diffstat (limited to 'arch/x86_64')
| -rw-r--r-- | arch/x86_64/kernel/smpboot.c | 84 |
1 files changed, 36 insertions, 48 deletions
diff --git a/arch/x86_64/kernel/smpboot.c b/arch/x86_64/kernel/smpboot.c index 5a3f955b657..571a55462fa 100644 --- a/arch/x86_64/kernel/smpboot.c +++ b/arch/x86_64/kernel/smpboot.c @@ -445,6 +445,33 @@ void __cpuinit smp_callin(void) cpu_set(cpuid, cpu_callin_map); } +static inline void set_cpu_sibling_map(int cpu) +{ + int i; + + if (smp_num_siblings > 1) { + for_each_cpu(i) { + if (cpu_core_id[cpu] == cpu_core_id[i]) { + cpu_set(i, cpu_sibling_map[cpu]); + cpu_set(cpu, cpu_sibling_map[i]); + } + } + } else { + cpu_set(cpu, cpu_sibling_map[cpu]); + } + + if (current_cpu_data.x86_num_cores > 1) { + for_each_cpu(i) { + if (phys_proc_id[cpu] == phys_proc_id[i]) { + cpu_set(i, cpu_core_map[cpu]); + cpu_set(cpu, cpu_core_map[i]); + } + } + } else { + cpu_core_map[cpu] = cpu_sibling_map[cpu]; + } +} + /* * Setup code on secondary processor (after comming out of the trampoline) */ @@ -475,6 +502,12 @@ void __cpuinit start_secondary(void) enable_APIC_timer(); /* + * The sibling maps must be set before turing the online map on for + * this cpu + */ + set_cpu_sibling_map(smp_processor_id()); + + /* * Allow the master to continue. */ cpu_set(smp_processor_id(), cpu_online_map); @@ -817,51 +850,6 @@ cycles_t cacheflush_time; unsigned long cache_decay_ticks; /* - * Construct cpu_sibling_map[], so that we can tell the sibling CPU - * on SMT systems efficiently. - */ -static __cpuinit void detect_siblings(void) -{ - int cpu; - - for (cpu = 0; cpu < NR_CPUS; cpu++) { - cpus_clear(cpu_sibling_map[cpu]); - cpus_clear(cpu_core_map[cpu]); - } - - for_each_online_cpu (cpu) { - struct cpuinfo_x86 *c = cpu_data + cpu; - int siblings = 0; - int i; - if (smp_num_siblings > 1) { - for_each_online_cpu (i) { - if (cpu_core_id[cpu] == cpu_core_id[i]) { - siblings++; - cpu_set(i, cpu_sibling_map[cpu]); - } - } - } else { - siblings++; - cpu_set(cpu, cpu_sibling_map[cpu]); - } - - if (siblings != smp_num_siblings) { - printk(KERN_WARNING - "WARNING: %d siblings found for CPU%d, should be %d\n", - siblings, cpu, smp_num_siblings); - smp_num_siblings = siblings; - } - if (c->x86_num_cores > 1) { - for_each_online_cpu(i) { - if (phys_proc_id[cpu] == phys_proc_id[i]) - cpu_set(i, cpu_core_map[cpu]); - } - } else - cpu_core_map[cpu] = cpu_sibling_map[cpu]; - } -} - -/* * Cleanup possible dangling ends... */ static __cpuinit void smp_cleanup_boot(void) @@ -1048,6 +1036,8 @@ void __init smp_prepare_boot_cpu(void) int me = smp_processor_id(); cpu_set(me, cpu_online_map); cpu_set(me, cpu_callout_map); + cpu_set(0, cpu_sibling_map[0]); + cpu_set(0, cpu_core_map[0]); } /* @@ -1107,7 +1097,6 @@ void __init smp_cpus_done(unsigned int max_cpus) setup_ioapic_dest(); #endif - detect_siblings(); time_init_gtod(); check_nmi_watchdog(); @@ -1115,8 +1104,7 @@ void __init smp_cpus_done(unsigned int max_cpus) #ifdef CONFIG_HOTPLUG_CPU -static void -remove_siblinginfo(int cpu) +static void remove_siblinginfo(int cpu) { int sibling; |