diff options
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/machine_kexec_64.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/rtas.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/smp.c | 234 | ||||
| -rw-r--r-- | arch/powerpc/kernel/tau_6xx.c | 4 | ||||
| -rw-r--r-- | arch/powerpc/kernel/time.c | 2 |
5 files changed, 25 insertions, 219 deletions
diff --git a/arch/powerpc/kernel/machine_kexec_64.c b/arch/powerpc/kernel/machine_kexec_64.c index 704375bda73a..b732b5f8e356 100644 --- a/arch/powerpc/kernel/machine_kexec_64.c +++ b/arch/powerpc/kernel/machine_kexec_64.c @@ -172,7 +172,7 @@ static void kexec_prepare_cpus(void) { int my_cpu, i, notified=-1; - smp_call_function(kexec_smp_down, NULL, 0, /* wait */0); + smp_call_function(kexec_smp_down, NULL, /* wait */0); my_cpu = get_cpu(); /* check the others cpus are now down (via paca hw cpu id == -1) */ diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c index 34843c318419..647f3e8677dc 100644 --- a/arch/powerpc/kernel/rtas.c +++ b/arch/powerpc/kernel/rtas.c @@ -747,7 +747,7 @@ static int rtas_ibm_suspend_me(struct rtas_args *args) /* Call function on all CPUs. One of us will make the * rtas call */ - if (on_each_cpu(rtas_percpu_suspend_me, &data, 1, 0)) + if (on_each_cpu(rtas_percpu_suspend_me, &data, 0)) data.error = -EINVAL; wait_for_completion(&done); diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 1457aa0a08f1..5191b46a611e 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -72,12 +72,8 @@ struct smp_ops_t *smp_ops; static volatile unsigned int cpu_callin_map[NR_CPUS]; -void smp_call_function_interrupt(void); - int smt_enabled_at_boot = 1; -static int ipi_fail_ok; - static void (*crash_ipi_function_ptr)(struct pt_regs *) = NULL; #ifdef CONFIG_PPC64 @@ -99,12 +95,15 @@ void smp_message_recv(int msg) { switch(msg) { case PPC_MSG_CALL_FUNCTION: - smp_call_function_interrupt(); + generic_smp_call_function_interrupt(); break; case PPC_MSG_RESCHEDULE: /* XXX Do we have to do this? */ set_need_resched(); break; + case PPC_MSG_CALL_FUNC_SINGLE: + generic_smp_call_function_single_interrupt(); + break; case PPC_MSG_DEBUGGER_BREAK: if (crash_ipi_function_ptr) { crash_ipi_function_ptr(get_irq_regs()); @@ -128,6 +127,19 @@ void smp_send_reschedule(int cpu) smp_ops->message_pass(cpu, PPC_MSG_RESCHEDULE); } +void arch_send_call_function_single_ipi(int cpu) +{ + smp_ops->message_pass(cpu, PPC_MSG_CALL_FUNC_SINGLE); +} + +void arch_send_call_function_ipi(cpumask_t mask) +{ + unsigned int cpu; + + for_each_cpu_mask(cpu, mask) + smp_ops->message_pass(cpu, PPC_MSG_CALL_FUNCTION); +} + #ifdef CONFIG_DEBUGGER void smp_send_debugger_break(int cpu) { @@ -154,215 +166,9 @@ static void stop_this_cpu(void *dummy) ; } -/* - * Structure and data for smp_call_function(). This is designed to minimise - * static memory requirements. It also looks cleaner. - * Stolen from the i386 version. - */ -static __cacheline_aligned_in_smp DEFINE_SPINLOCK(call_lock); - -static struct call_data_struct { - void (*func) (void *info); - void *info; - atomic_t started; - atomic_t finished; - int wait; -} *call_data; - -/* delay of at least 8 seconds */ -#define SMP_CALL_TIMEOUT 8 - -/* - * These functions send a 'generic call function' IPI to other online - * CPUS in the system. - * - * [SUMMARY] Run a function on other CPUs. - * <func> The function to run. This must be fast and non-blocking. - * <info> An arbitrary pointer to pass to the function. - * <nonatomic> currently unused. - * <wait> If true, wait (atomically) until function has completed on other CPUs. - * [RETURNS] 0 on success, else a negative status code. Does not return until - * remote CPUs are nearly ready to execute <<func>> or are or have executed. - * <map> is a cpu map of the cpus to send IPI to. - * - * You must not call this function with disabled interrupts or from a - * hardware interrupt handler or from a bottom half handler. - */ -static int __smp_call_function_map(void (*func) (void *info), void *info, - int nonatomic, int wait, cpumask_t map) -{ - struct call_data_struct data; - int ret = -1, num_cpus; - int cpu; - u64 timeout; - - if (unlikely(smp_ops == NULL)) - return ret; - - data.func = func; - data.info = info; - atomic_set(&data.started, 0); - data.wait = wait; - if (wait) - atomic_set(&data.finished, 0); - - /* remove 'self' from the map */ - if (cpu_isset(smp_processor_id(), map)) - cpu_clear(smp_processor_id(), map); - - /* sanity check the map, remove any non-online processors. */ - cpus_and(map, map, cpu_online_map); - - num_cpus = cpus_weight(map); - if (!num_cpus) - goto done; - - call_data = &data; - smp_wmb(); - /* Send a message to all CPUs in the map */ - for_each_cpu_mask(cpu, map) - smp_ops->message_pass(cpu, PPC_MSG_CALL_FUNCTION); - - timeout = get_tb() + (u64) SMP_CALL_TIMEOUT * tb_ticks_per_sec; - - /* Wait for indication that they have received the message */ - while (atomic_read(&data.started) != num_cpus) { - HMT_low(); - if (get_tb() >= timeout) { - printk("smp_call_function on cpu %d: other cpus not " - "responding (%d)\n", smp_processor_id(), - atomic_read(&data.started)); - if (!ipi_fail_ok) - debugger(NULL); - goto out; - } - } - - /* optionally wait for the CPUs to complete */ - if (wait) { - while (atomic_read(&data.finished) != num_cpus) { - HMT_low(); - if (get_tb() >= timeout) { - printk("smp_call_function on cpu %d: other " - "cpus not finishing (%d/%d)\n", - smp_processor_id(), - atomic_read(&data.finished), - atomic_read(&data.started)); - debugger(NULL); - goto out; - } - } - } - - done: - ret = 0; - - out: - call_data = NULL; - HMT_medium(); - return ret; -} - -static int __smp_call_function(void (*func)(void *info), void *info, - int nonatomic, int wait) -{ - int ret; - spin_lock(&call_lock); - ret =__smp_call_function_map(func, info, nonatomic, wait, - cpu_online_map); - spin_unlock(&call_lock); - return ret; -} - -int smp_call_function(void (*func) (void *info), void *info, int nonatomic, - int wait) -{ - /* Can deadlock when called with interrupts disabled */ - WARN_ON(irqs_disabled()); - - return __smp_call_function(func, info, nonatomic, wait); -} -EXPORT_SYMBOL(smp_call_function); - -int smp_call_function_single(int cpu, void (*func) (void *info), void *info, - int nonatomic, int wait) -{ - cpumask_t map = CPU_MASK_NONE; - int ret = 0; - - /* Can deadlock when called with interrupts disabled */ - WARN_ON(irqs_disabled()); - - if (!cpu_online(cpu)) - return -EINVAL; - - cpu_set(cpu, map); - if (cpu != get_cpu()) { - spin_lock(&call_lock); - ret = __smp_call_function_map(func, info, nonatomic, wait, map); - spin_unlock(&call_lock); - } else { - local_irq_disable(); - func(info); - local_irq_enable(); - } - put_cpu(); - return ret; -} -EXPORT_SYMBOL(smp_call_function_single); - void smp_send_stop(void) { - int nolock; - - /* It's OK to fail sending the IPI, since the alternative is to - * be stuck forever waiting on the other CPU to take the interrupt. - * - * It's better to at least continue and go through reboot, since this - * function is usually called at panic or reboot time in the first - * place. - */ - ipi_fail_ok = 1; - - /* Don't deadlock in case we got called through panic */ - nolock = !spin_trylock(&call_lock); - __smp_call_function_map(stop_this_cpu, NULL, 1, 0, cpu_online_map); - if (!nolock) - spin_unlock(&call_lock); -} - -void smp_call_function_interrupt(void) -{ - void (*func) (void *info); - void *info; - int wait; - - /* call_data will be NULL if the sender timed out while - * waiting on us to receive the call. - */ - if (!call_data) - return; - - func = call_data->func; - info = call_data->info; - wait = call_data->wait; - - if (!wait) - smp_mb__before_atomic_inc(); - - /* - * Notify initiating CPU that I've grabbed the data and am - * about to execute the function - */ - atomic_inc(&call_data->started); - /* - * At this point the info structure may be out of scope unless wait==1 - */ - (*func)(info); - if (wait) { - smp_mb__before_atomic_inc(); - atomic_inc(&call_data->finished); - } + smp_call_function(stop_this_cpu, NULL, 0); } extern struct gettimeofday_struct do_gtod; @@ -596,9 +402,9 @@ int __devinit start_secondary(void *unused) secondary_cpu_time_init(); - spin_lock(&call_lock); + ipi_call_lock(); cpu_set(cpu, cpu_online_map); - spin_unlock(&call_lock); + ipi_call_unlock(); local_irq_enable(); diff --git a/arch/powerpc/kernel/tau_6xx.c b/arch/powerpc/kernel/tau_6xx.c index 368a4934f7ee..c3a56d65c5a9 100644 --- a/arch/powerpc/kernel/tau_6xx.c +++ b/arch/powerpc/kernel/tau_6xx.c @@ -192,7 +192,7 @@ static void tau_timeout_smp(unsigned long unused) /* schedule ourselves to be run again */ mod_timer(&tau_timer, jiffies + shrink_timer) ; - on_each_cpu(tau_timeout, NULL, 1, 0); + on_each_cpu(tau_timeout, NULL, 0); } /* @@ -234,7 +234,7 @@ int __init TAU_init(void) tau_timer.expires = jiffies + shrink_timer; add_timer(&tau_timer); - on_each_cpu(TAU_init_smp, NULL, 1, 0); + on_each_cpu(TAU_init_smp, NULL, 0); printk("Thermal assist unit "); #ifdef CONFIG_TAU_INT diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c index 73401e83739a..f1a38a6c1e2d 100644 --- a/arch/powerpc/kernel/time.c +++ b/arch/powerpc/kernel/time.c @@ -322,7 +322,7 @@ void snapshot_timebases(void) { if (!cpu_has_feature(CPU_FTR_PURR)) return; - on_each_cpu(snapshot_tb_and_purr, NULL, 0, 1); + on_each_cpu(snapshot_tb_and_purr, NULL, 1); } /* |