diff options
| -rw-r--r-- | arch/x86/include/asm/entry_arch.h | 1 | ||||
| -rw-r--r-- | arch/x86/include/asm/hw_irq.h | 1 | ||||
| -rw-r--r-- | arch/x86/include/asm/irq_vectors.h | 9 | ||||
| -rw-r--r-- | arch/x86/kernel/entry_64.S | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/irqinit.c | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/smp.c | 28 |
6 files changed, 37 insertions, 7 deletions
diff --git a/arch/x86/include/asm/entry_arch.h b/arch/x86/include/asm/entry_arch.h index 4cdcf5a3c96..69f886805ec 100644 --- a/arch/x86/include/asm/entry_arch.h +++ b/arch/x86/include/asm/entry_arch.h @@ -14,6 +14,7 @@ BUILD_INTERRUPT(reschedule_interrupt,RESCHEDULE_VECTOR) BUILD_INTERRUPT(call_function_interrupt,CALL_FUNCTION_VECTOR) BUILD_INTERRUPT(call_function_single_interrupt,CALL_FUNCTION_SINGLE_VECTOR) BUILD_INTERRUPT(irq_move_cleanup_interrupt,IRQ_MOVE_CLEANUP_VECTOR) +BUILD_INTERRUPT(reboot_interrupt,REBOOT_VECTOR) BUILD_INTERRUPT3(invalidate_interrupt0,INVALIDATE_TLB_VECTOR_START+0, smp_invalidate_interrupt) diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h index 4e59197e29b..1c8f28a6305 100644 --- a/arch/x86/include/asm/hw_irq.h +++ b/arch/x86/include/asm/hw_irq.h @@ -45,6 +45,7 @@ extern void invalidate_interrupt6(void); extern void invalidate_interrupt7(void); extern void irq_move_cleanup_interrupt(void); +extern void reboot_interrupt(void); extern void threshold_interrupt(void); extern void call_function_interrupt(void); diff --git a/arch/x86/include/asm/irq_vectors.h b/arch/x86/include/asm/irq_vectors.h index 68f7cf84a33..28477e4f2d4 100644 --- a/arch/x86/include/asm/irq_vectors.h +++ b/arch/x86/include/asm/irq_vectors.h @@ -88,12 +88,7 @@ #define CALL_FUNCTION_SINGLE_VECTOR 0xfb #define THERMAL_APIC_VECTOR 0xfa #define THRESHOLD_APIC_VECTOR 0xf9 - -#ifdef CONFIG_X86_32 -/* 0xf8 : free */ -#else -# define UV_BAU_MESSAGE 0xf8 -#endif +#define REBOOT_VECTOR 0xf8 /* f0-f7 used for spreading out TLB flushes: */ #define INVALIDATE_TLB_VECTOR_END 0xf7 @@ -117,6 +112,8 @@ */ #define GENERIC_INTERRUPT_VECTOR 0xed +#define UV_BAU_MESSAGE 0xec + /* * Self IPI vector for machine checks */ diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index 711c130a841..4234b123565 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -976,6 +976,8 @@ END(\sym) #ifdef CONFIG_SMP apicinterrupt IRQ_MOVE_CLEANUP_VECTOR \ irq_move_cleanup_interrupt smp_irq_move_cleanup_interrupt +apicinterrupt REBOOT_VECTOR \ + reboot_interrupt smp_reboot_interrupt #endif #ifdef CONFIG_X86_UV diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c index 441f6ec6e9d..4a69ec55be3 100644 --- a/arch/x86/kernel/irqinit.c +++ b/arch/x86/kernel/irqinit.c @@ -173,6 +173,9 @@ static void __init smp_intr_init(void) /* Low priority IPI to cleanup after moving an irq */ set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt); set_bit(IRQ_MOVE_CLEANUP_VECTOR, used_vectors); + + /* IPI used for rebooting/stopping */ + alloc_intr_gate(REBOOT_VECTOR, reboot_interrupt); #endif #endif /* CONFIG_SMP */ } diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c index f6db48c405b..bf1831aa14f 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); |