diff options
| -rw-r--r-- | arch/x86_64/kernel/reboot.c | 62 |
1 files changed, 33 insertions, 29 deletions
diff --git a/arch/x86_64/kernel/reboot.c b/arch/x86_64/kernel/reboot.c index be4b36f762cf..57e71dbdfd69 100644 --- a/arch/x86_64/kernel/reboot.c +++ b/arch/x86_64/kernel/reboot.c @@ -66,41 +66,47 @@ static int __init reboot_setup(char *str) __setup("reboot=", reboot_setup); -#ifdef CONFIG_SMP -static void smp_halt(void) +static inline void kb_wait(void) { - int cpuid = safe_smp_processor_id(); - static int first_entry = 1; + int i; - if (reboot_force) - return; + for (i=0; i<0x10000; i++) + if ((inb_p(0x64) & 0x02) == 0) + break; +} - if (first_entry) { - first_entry = 0; - smp_call_function((void *)machine_restart, NULL, 1, 0); - } - - smp_stop_cpu(); +void machine_shutdown(void) +{ + /* Stop the cpus and apics */ +#ifdef CONFIG_SMP + int reboot_cpu_id; - /* AP calling this. Just halt */ - if (cpuid != boot_cpu_id) { - for (;;) - asm("hlt"); + /* The boot cpu is always logical cpu 0 */ + reboot_cpu_id = 0; + + /* Make certain the cpu I'm about to reboot on is online */ + if (!cpu_isset(reboot_cpu_id, cpu_online_map)) { + reboot_cpu_id = smp_processor_id(); } - /* Wait for all other CPUs to have run smp_stop_cpu */ - while (!cpus_empty(cpu_online_map)) - rep_nop(); -} + /* Make certain I only run on the appropriate processor */ + set_cpus_allowed(current, cpumask_of_cpu(reboot_cpu_id)); + + /* O.K Now that I'm on the appropriate processor, + * stop all of the others. + */ + smp_send_stop(); #endif -static inline void kb_wait(void) -{ - int i; + local_irq_disable(); - for (i=0; i<0x10000; i++) - if ((inb_p(0x64) & 0x02) == 0) - break; +#ifndef CONFIG_SMP + disable_local_APIC(); +#endif + + disable_IO_APIC(); + + local_irq_enable(); } void machine_restart(char * __unused) @@ -109,9 +115,7 @@ void machine_restart(char * __unused) printk("machine restart\n"); -#ifdef CONFIG_SMP - smp_halt(); -#endif + machine_shutdown(); if (!reboot_force) { local_irq_disable(); |