diff options
Diffstat (limited to 'arch/x86/kernel/smp.c')
| -rw-r--r-- | arch/x86/kernel/smp.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c index 28f5fb495a66..ec1de97600e7 100644 --- a/arch/x86/kernel/smp.c +++ b/arch/x86/kernel/smp.c @@ -150,14 +150,40 @@ void native_send_call_func_ipi(const struct cpumask *mask) * this function calls the 'stop' function on all other CPUs in the system. */ +asmlinkage void smp_reboot_interrupt(void) +{ + ack_APIC_irq(); + irq_enter(); + stop_this_cpu(NULL); + irq_exit(); +} + static void native_smp_send_stop(void) { unsigned long flags; + unsigned long wait; if (reboot_force) return; - smp_call_function(stop_this_cpu, NULL, 0); + /* + * Use an own vector here because smp_call_function + * does lots of things not suitable in a panic situation. + * On most systems we could also use an NMI here, + * but there are a few systems around where NMI + * is problematic so stay with an non NMI for now + * (this implies we cannot stop CPUs spinning with irq off + * currently) + */ + if (num_online_cpus() > 1) { + apic->send_IPI_allbutself(REBOOT_VECTOR); + + /* Don't wait longer than a second */ + wait = USEC_PER_SEC; + while (num_online_cpus() > 1 && wait--) + udelay(1); + } + local_irq_save(flags); disable_local_APIC(); local_irq_restore(flags); |