diff options
| -rw-r--r-- | arch/x86/oprofile/nmi_int.c | 144 |
1 files changed, 70 insertions, 74 deletions
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c index f38c5cf0fdbb..998c7dca31e7 100644 --- a/arch/x86/oprofile/nmi_int.c +++ b/arch/x86/oprofile/nmi_int.c @@ -97,6 +97,29 @@ static void nmi_cpu_save_registers(struct op_msrs *msrs) } } +static void nmi_cpu_start(void *dummy) +{ + struct op_msrs const *msrs = &__get_cpu_var(cpu_msrs); + model->start(msrs); +} + +static int nmi_start(void) +{ + on_each_cpu(nmi_cpu_start, NULL, 1); + return 0; +} + +static void nmi_cpu_stop(void *dummy) +{ + struct op_msrs const *msrs = &__get_cpu_var(cpu_msrs); + model->stop(msrs); +} + +static void nmi_stop(void) +{ + on_each_cpu(nmi_cpu_stop, NULL, 1); +} + #ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX static DEFINE_PER_CPU(int, switch_index); @@ -171,6 +194,53 @@ static void nmi_cpu_restore_mpx_registers(struct op_msrs *msrs) } } +static void nmi_cpu_switch(void *dummy) +{ + int cpu = smp_processor_id(); + int si = per_cpu(switch_index, cpu); + struct op_msrs *msrs = &per_cpu(cpu_msrs, cpu); + + nmi_cpu_stop(NULL); + nmi_cpu_save_mpx_registers(msrs); + + /* move to next set */ + si += model->num_counters; + if ((si > model->num_virt_counters) || (counter_config[si].count == 0)) + per_cpu(switch_index, cpu) = 0; + else + per_cpu(switch_index, cpu) = si; + + model->switch_ctrl(model, msrs); + nmi_cpu_restore_mpx_registers(msrs); + + nmi_cpu_start(NULL); +} + + +/* + * Quick check to see if multiplexing is necessary. + * The check should be sufficient since counters are used + * in ordre. + */ +static int nmi_multiplex_on(void) +{ + return counter_config[model->num_counters].count ? 0 : -EINVAL; +} + +static int nmi_switch_event(void) +{ + if (!model->switch_ctrl) + return -ENOSYS; /* not implemented */ + if (nmi_multiplex_on() < 0) + return -EINVAL; /* not necessary */ + + on_each_cpu(nmi_cpu_switch, NULL, 1); + + atomic_inc(&multiplex_counter); + + return 0; +} + #else inline int op_x86_phys_to_virt(int phys) { return phys; } @@ -325,29 +395,6 @@ static void nmi_shutdown(void) put_cpu_var(cpu_msrs); } -static void nmi_cpu_start(void *dummy) -{ - struct op_msrs const *msrs = &__get_cpu_var(cpu_msrs); - model->start(msrs); -} - -static int nmi_start(void) -{ - on_each_cpu(nmi_cpu_start, NULL, 1); - return 0; -} - -static void nmi_cpu_stop(void *dummy) -{ - struct op_msrs const *msrs = &__get_cpu_var(cpu_msrs); - model->stop(msrs); -} - -static void nmi_stop(void) -{ - on_each_cpu(nmi_cpu_stop, NULL, 1); -} - static int nmi_create_files(struct super_block *sb, struct dentry *root) { unsigned int i; @@ -379,57 +426,6 @@ static int nmi_create_files(struct super_block *sb, struct dentry *root) return 0; } -#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX - -static void nmi_cpu_switch(void *dummy) -{ - int cpu = smp_processor_id(); - int si = per_cpu(switch_index, cpu); - struct op_msrs *msrs = &per_cpu(cpu_msrs, cpu); - - nmi_cpu_stop(NULL); - nmi_cpu_save_mpx_registers(msrs); - - /* move to next set */ - si += model->num_counters; - if ((si > model->num_virt_counters) || (counter_config[si].count == 0)) - per_cpu(switch_index, cpu) = 0; - else - per_cpu(switch_index, cpu) = si; - - model->switch_ctrl(model, msrs); - nmi_cpu_restore_mpx_registers(msrs); - - nmi_cpu_start(NULL); -} - - -/* - * Quick check to see if multiplexing is necessary. - * The check should be sufficient since counters are used - * in ordre. - */ -static int nmi_multiplex_on(void) -{ - return counter_config[model->num_counters].count ? 0 : -EINVAL; -} - -static int nmi_switch_event(void) -{ - if (!model->switch_ctrl) - return -ENOSYS; /* not implemented */ - if (nmi_multiplex_on() < 0) - return -EINVAL; /* not necessary */ - - on_each_cpu(nmi_cpu_switch, NULL, 1); - - atomic_inc(&multiplex_counter); - - return 0; -} - -#endif - #ifdef CONFIG_SMP static int oprofile_cpu_notifier(struct notifier_block *b, unsigned long action, void *data) |