diff options
Diffstat (limited to 'arch/x86/oprofile')
| -rw-r--r-- | arch/x86/oprofile/nmi_int.c | 212 |
1 files changed, 98 insertions, 114 deletions
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c index c8ab79ef427..1f11cf0a307 100644 --- a/arch/x86/oprofile/nmi_int.c +++ b/arch/x86/oprofile/nmi_int.c @@ -18,11 +18,11 @@ #include <asm/nmi.h> #include <asm/msr.h> #include <asm/apic.h> - + #include "op_counter.h" #include "op_x86_model.h" -static struct op_x86_model_spec const * model; +static struct op_x86_model_spec const *model; static struct op_msrs cpu_msrs[NR_CPUS]; static unsigned long saved_lvtpc[NR_CPUS]; @@ -41,7 +41,6 @@ static int nmi_suspend(struct sys_device *dev, pm_message_t state) return 0; } - static int nmi_resume(struct sys_device *dev) { if (nmi_enabled == 1) @@ -49,29 +48,27 @@ static int nmi_resume(struct sys_device *dev) return 0; } - static struct sysdev_class oprofile_sysclass = { .name = "oprofile", .resume = nmi_resume, .suspend = nmi_suspend, }; - static struct sys_device device_oprofile = { .id = 0, .cls = &oprofile_sysclass, }; - static int __init init_sysfs(void) { int error; - if (!(error = sysdev_class_register(&oprofile_sysclass))) + + error = sysdev_class_register(&oprofile_sysclass); + if (!error) error = sysdev_register(&device_oprofile); return error; } - static void exit_sysfs(void) { sysdev_unregister(&device_oprofile); @@ -90,7 +87,7 @@ static int profile_exceptions_notify(struct notifier_block *self, int ret = NOTIFY_DONE; int cpu = smp_processor_id(); - switch(val) { + switch (val) { case DIE_NMI: if (model->check_ctrs(args->regs, &cpu_msrs[cpu])) ret = NOTIFY_STOP; @@ -101,24 +98,24 @@ static int profile_exceptions_notify(struct notifier_block *self, return ret; } -static void nmi_cpu_save_registers(struct op_msrs * msrs) +static void nmi_cpu_save_registers(struct op_msrs *msrs) { unsigned int const nr_ctrs = model->num_counters; - unsigned int const nr_ctrls = model->num_controls; - struct op_msr * counters = msrs->counters; - struct op_msr * controls = msrs->controls; + unsigned int const nr_ctrls = model->num_controls; + struct op_msr *counters = msrs->counters; + struct op_msr *controls = msrs->controls; unsigned int i; for (i = 0; i < nr_ctrs; ++i) { - if (counters[i].addr){ + if (counters[i].addr) { rdmsr(counters[i].addr, counters[i].saved.low, counters[i].saved.high); } } - + for (i = 0; i < nr_ctrls; ++i) { - if (controls[i].addr){ + if (controls[i].addr) { rdmsr(controls[i].addr, controls[i].saved.low, controls[i].saved.high); @@ -126,15 +123,13 @@ static void nmi_cpu_save_registers(struct op_msrs * msrs) } } - -static void nmi_save_registers(void * dummy) +static void nmi_save_registers(void *dummy) { int cpu = smp_processor_id(); - struct op_msrs * msrs = &cpu_msrs[cpu]; + struct op_msrs *msrs = &cpu_msrs[cpu]; nmi_cpu_save_registers(msrs); } - static void free_msrs(void) { int i; @@ -146,7 +141,6 @@ static void free_msrs(void) } } - static int allocate_msrs(void) { int success = 1; @@ -173,11 +167,10 @@ static int allocate_msrs(void) return success; } - -static void nmi_cpu_setup(void * dummy) +static void nmi_cpu_setup(void *dummy) { int cpu = smp_processor_id(); - struct op_msrs * msrs = &cpu_msrs[cpu]; + struct op_msrs *msrs = &cpu_msrs[cpu]; spin_lock(&oprofilefs_lock); model->setup_ctrs(msrs); spin_unlock(&oprofilefs_lock); @@ -193,13 +186,14 @@ static struct notifier_block profile_exceptions_nb = { static int nmi_setup(void) { - int err=0; + int err = 0; int cpu; if (!allocate_msrs()) return -ENOMEM; - if ((err = register_die_notifier(&profile_exceptions_nb))){ + err = register_die_notifier(&profile_exceptions_nb); + if (err) { free_msrs(); return err; } @@ -210,7 +204,7 @@ static int nmi_setup(void) /* Assume saved/restored counters are the same on all CPUs */ model->fill_in_addresses(&cpu_msrs[0]); - for_each_possible_cpu (cpu) { + for_each_possible_cpu(cpu) { if (cpu != 0) { memcpy(cpu_msrs[cpu].counters, cpu_msrs[0].counters, sizeof(struct op_msr) * model->num_counters); @@ -226,39 +220,37 @@ static int nmi_setup(void) return 0; } - -static void nmi_restore_registers(struct op_msrs * msrs) +static void nmi_restore_registers(struct op_msrs *msrs) { unsigned int const nr_ctrs = model->num_counters; - unsigned int const nr_ctrls = model->num_controls; - struct op_msr * counters = msrs->counters; - struct op_msr * controls = msrs->controls; + unsigned int const nr_ctrls = model->num_controls; + struct op_msr *counters = msrs->counters; + struct op_msr *controls = msrs->controls; unsigned int i; for (i = 0; i < nr_ctrls; ++i) { - if (controls[i].addr){ + if (controls[i].addr) { wrmsr(controls[i].addr, controls[i].saved.low, controls[i].saved.high); } } - + for (i = 0; i < nr_ctrs; ++i) { - if (counters[i].addr){ + if (counters[i].addr) { wrmsr(counters[i].addr, counters[i].saved.low, counters[i].saved.high); } } } - -static void nmi_cpu_shutdown(void * dummy) +static void nmi_cpu_shutdown(void *dummy) { unsigned int v; int cpu = smp_processor_id(); - struct op_msrs * msrs = &cpu_msrs[cpu]; - + struct op_msrs *msrs = &cpu_msrs[cpu]; + /* restoring APIC_LVTPC can trigger an apic error because the delivery * mode and vector nr combination can be illegal. That's by design: on * power on apic lvt contain a zero vector nr which are legal only for @@ -271,7 +263,6 @@ static void nmi_cpu_shutdown(void * dummy) nmi_restore_registers(msrs); } - static void nmi_shutdown(void) { nmi_enabled = 0; @@ -281,45 +272,40 @@ static void nmi_shutdown(void) free_msrs(); } - -static void nmi_cpu_start(void * dummy) +static void nmi_cpu_start(void *dummy) { - struct op_msrs const * msrs = &cpu_msrs[smp_processor_id()]; + struct op_msrs const *msrs = &cpu_msrs[smp_processor_id()]; model->start(msrs); } - static int nmi_start(void) { on_each_cpu(nmi_cpu_start, NULL, 0, 1); return 0; } - - -static void nmi_cpu_stop(void * dummy) + +static void nmi_cpu_stop(void *dummy) { - struct op_msrs const * msrs = &cpu_msrs[smp_processor_id()]; + struct op_msrs const *msrs = &cpu_msrs[smp_processor_id()]; model->stop(msrs); } - - + static void nmi_stop(void) { on_each_cpu(nmi_cpu_stop, NULL, 0, 1); } - struct op_counter_config counter_config[OP_MAX_COUNTER]; -static int nmi_create_files(struct super_block * sb, struct dentry * root) +static int nmi_create_files(struct super_block *sb, struct dentry *root) { unsigned int i; for (i = 0; i < model->num_counters; ++i) { - struct dentry * dir; + struct dentry *dir; char buf[4]; - - /* quick little hack to _not_ expose a counter if it is not + + /* quick little hack to _not_ expose a counter if it is not * available for use. This should protect userspace app. * NOTE: assumes 1:1 mapping here (that counters are organized * sequentially in their struct assignment). @@ -329,21 +315,21 @@ static int nmi_create_files(struct super_block * sb, struct dentry * root) snprintf(buf, sizeof(buf), "%d", i); dir = oprofilefs_mkdir(sb, root, buf); - oprofilefs_create_ulong(sb, dir, "enabled", &counter_config[i].enabled); - oprofilefs_create_ulong(sb, dir, "event", &counter_config[i].event); - oprofilefs_create_ulong(sb, dir, "count", &counter_config[i].count); - oprofilefs_create_ulong(sb, dir, "unit_mask", &counter_config[i].unit_mask); - oprofilefs_create_ulong(sb, dir, "kernel", &counter_config[i].kernel); - oprofilefs_create_ulong(sb, dir, "user", &counter_config[i].user); + oprofilefs_create_ulong(sb, dir, "enabled", &counter_config[i].enabled); + oprofilefs_create_ulong(sb, dir, "event", &counter_config[i].event); + oprofilefs_create_ulong(sb, dir, "count", &counter_config[i].count); + oprofilefs_create_ulong(sb, dir, "unit_mask", &counter_config[i].unit_mask); + oprofilefs_create_ulong(sb, dir, "kernel", &counter_config[i].kernel); + oprofilefs_create_ulong(sb, dir, "user", &counter_config[i].user); } return 0; } - + static int p4force; module_param(p4force, int, 0); - -static int __init p4_init(char ** cpu_type) + +static int __init p4_init(char **cpu_type) { __u8 cpu_model = boot_cpu_data.x86_model; @@ -356,15 +342,15 @@ static int __init p4_init(char ** cpu_type) return 1; #else switch (smp_num_siblings) { - case 1: - *cpu_type = "i386/p4"; - model = &op_p4_spec; - return 1; - - case 2: - *cpu_type = "i386/p4-ht"; - model = &op_p4_ht2_spec; - return 1; + case 1: + *cpu_type = "i386/p4"; + model = &op_p4_spec; + return 1; + + case 2: + *cpu_type = "i386/p4-ht"; + model = &op_p4_ht2_spec; + return 1; } #endif @@ -373,8 +359,7 @@ static int __init p4_init(char ** cpu_type) return 0; } - -static int __init ppro_init(char ** cpu_type) +static int __init ppro_init(char **cpu_type) { __u8 cpu_model = boot_cpu_data.x86_model; @@ -409,52 +394,52 @@ int __init op_nmi_init(struct oprofile_operations *ops) if (!cpu_has_apic) return -ENODEV; - + switch (vendor) { - case X86_VENDOR_AMD: - /* Needs to be at least an Athlon (or hammer in 32bit mode) */ + case X86_VENDOR_AMD: + /* Needs to be at least an Athlon (or hammer in 32bit mode) */ - switch (family) { - default: + switch (family) { + default: + return -ENODEV; + case 6: + model = &op_athlon_spec; + cpu_type = "i386/athlon"; + break; + case 0xf: + model = &op_athlon_spec; + /* Actually it could be i386/hammer too, but give + user space an consistent name. */ + cpu_type = "x86-64/hammer"; + break; + case 0x10: + model = &op_athlon_spec; + cpu_type = "x86-64/family10"; + break; + } + break; + + case X86_VENDOR_INTEL: + switch (family) { + /* Pentium IV */ + case 0xf: + if (!p4_init(&cpu_type)) return -ENODEV; - case 6: - model = &op_athlon_spec; - cpu_type = "i386/athlon"; - break; - case 0xf: - model = &op_athlon_spec; - /* Actually it could be i386/hammer too, but give - user space an consistent name. */ - cpu_type = "x86-64/hammer"; - break; - case 0x10: - model = &op_athlon_spec; - cpu_type = "x86-64/family10"; - break; - } break; - - case X86_VENDOR_INTEL: - switch (family) { - /* Pentium IV */ - case 0xf: - if (!p4_init(&cpu_type)) - return -ENODEV; - break; - - /* A P6-class processor */ - case 6: - if (!ppro_init(&cpu_type)) - return -ENODEV; - break; - - default: - return -ENODEV; - } + + /* A P6-class processor */ + case 6: + if (!ppro_init(&cpu_type)) + return -ENODEV; break; default: return -ENODEV; + } + break; + + default: + return -ENODEV; } init_sysfs(); @@ -469,7 +454,6 @@ int __init op_nmi_init(struct oprofile_operations *ops) return 0; } - void op_nmi_exit(void) { if (using_nmi) |