X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=arch%2Fx86%2Foprofile%2Fnmi_int.c;h=57f6c90880816b113074cf306f678f8781c04d50;hb=70a3075d40154053ad90d342b3dcb1b795c73dbb;hp=cc48d3fde545c014dc6d4a34f07cc2578ea0f481;hpb=d18d00f5dbcd1a95811617e9812cf0560bd465ee;p=safe%2Fjmp%2Flinux-2.6 diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c index cc48d3f..57f6c90 100644 --- a/arch/x86/oprofile/nmi_int.c +++ b/arch/x86/oprofile/nmi_int.c @@ -1,10 +1,11 @@ /** * @file nmi_int.c * - * @remark Copyright 2002 OProfile authors + * @remark Copyright 2002-2008 OProfile authors * @remark Read the file COPYING * * @author John Levon + * @author Robert Richter */ #include @@ -15,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -28,23 +30,48 @@ static DEFINE_PER_CPU(unsigned long, saved_lvtpc); static int nmi_start(void); static void nmi_stop(void); +static void nmi_cpu_start(void *dummy); +static void nmi_cpu_stop(void *dummy); /* 0 == registered but off, 1 == registered and on */ static int nmi_enabled = 0; +#ifdef CONFIG_SMP +static int oprofile_cpu_notifier(struct notifier_block *b, unsigned long action, + void *data) +{ + int cpu = (unsigned long)data; + switch (action) { + case CPU_DOWN_FAILED: + case CPU_ONLINE: + smp_call_function_single(cpu, nmi_cpu_start, NULL, 0); + break; + case CPU_DOWN_PREPARE: + smp_call_function_single(cpu, nmi_cpu_stop, NULL, 1); + break; + } + return NOTIFY_DONE; +} + +static struct notifier_block oprofile_cpu_nb = { + .notifier_call = oprofile_cpu_notifier +}; +#endif + #ifdef CONFIG_PM static int nmi_suspend(struct sys_device *dev, pm_message_t state) { + /* Only one CPU left, just stop that one */ if (nmi_enabled == 1) - nmi_stop(); + nmi_cpu_stop(NULL); return 0; } static int nmi_resume(struct sys_device *dev) { if (nmi_enabled == 1) - nmi_start(); + nmi_cpu_start(NULL); return 0; } @@ -218,8 +245,8 @@ static int nmi_setup(void) } } - on_each_cpu(nmi_save_registers, NULL, 0, 1); - on_each_cpu(nmi_cpu_setup, NULL, 0, 1); + on_each_cpu(nmi_save_registers, NULL, 1); + on_each_cpu(nmi_cpu_setup, NULL, 1); nmi_enabled = 1; return 0; } @@ -269,12 +296,15 @@ static void nmi_cpu_shutdown(void *dummy) static void nmi_shutdown(void) { - struct op_msrs *msrs = &__get_cpu_var(cpu_msrs); + struct op_msrs *msrs; + nmi_enabled = 0; - on_each_cpu(nmi_cpu_shutdown, NULL, 0, 1); + on_each_cpu(nmi_cpu_shutdown, NULL, 1); unregister_die_notifier(&profile_exceptions_nb); + msrs = &get_cpu_var(cpu_msrs); model->shutdown(msrs); free_msrs(); + put_cpu_var(cpu_msrs); } static void nmi_cpu_start(void *dummy) @@ -285,7 +315,7 @@ static void nmi_cpu_start(void *dummy) static int nmi_start(void) { - on_each_cpu(nmi_cpu_start, NULL, 0, 1); + on_each_cpu(nmi_cpu_start, NULL, 1); return 0; } @@ -297,7 +327,7 @@ static void nmi_cpu_stop(void *dummy) static void nmi_stop(void) { - on_each_cpu(nmi_cpu_stop, NULL, 0, 1); + on_each_cpu(nmi_cpu_stop, NULL, 1); } struct op_counter_config counter_config[OP_MAX_COUNTER]; @@ -368,20 +398,34 @@ static int __init ppro_init(char **cpu_type) { __u8 cpu_model = boot_cpu_data.x86_model; - if (cpu_model == 14) + switch (cpu_model) { + case 0 ... 2: + *cpu_type = "i386/ppro"; + break; + case 3 ... 5: + *cpu_type = "i386/pii"; + break; + case 6 ... 8: + *cpu_type = "i386/piii"; + break; + case 9: + *cpu_type = "i386/p6_mobile"; + break; + case 10 ... 13: + *cpu_type = "i386/p6"; + break; + case 14: *cpu_type = "i386/core"; - else if (cpu_model == 15 || cpu_model == 23) + break; + case 15: case 23: + *cpu_type = "i386/core_2"; + break; + case 26: *cpu_type = "i386/core_2"; - else if (cpu_model > 0xd) + break; + default: + /* Unknown */ return 0; - else if (cpu_model == 9) { - *cpu_type = "i386/p6_mobile"; - } else if (cpu_model > 5) { - *cpu_type = "i386/piii"; - } else if (cpu_model > 2) { - *cpu_type = "i386/pii"; - } else { - *cpu_type = "i386/ppro"; } model = &op_ppro_spec; @@ -396,6 +440,7 @@ int __init op_nmi_init(struct oprofile_operations *ops) __u8 vendor = boot_cpu_data.x86_vendor; __u8 family = boot_cpu_data.x86; char *cpu_type; + int ret = 0; if (!cpu_has_apic) return -ENODEV; @@ -408,19 +453,23 @@ int __init op_nmi_init(struct oprofile_operations *ops) default: return -ENODEV; case 6: - model = &op_athlon_spec; + model = &op_amd_spec; cpu_type = "i386/athlon"; break; case 0xf: - model = &op_athlon_spec; + model = &op_amd_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; + model = &op_amd_spec; cpu_type = "x86-64/family10"; break; + case 0x11: + model = &op_amd_spec; + cpu_type = "x86-64/family11h"; + break; } break; @@ -447,20 +496,36 @@ int __init op_nmi_init(struct oprofile_operations *ops) return -ENODEV; } - init_sysfs(); - using_nmi = 1; +#ifdef CONFIG_SMP + register_cpu_notifier(&oprofile_cpu_nb); +#endif + /* default values, can be overwritten by model */ ops->create_files = nmi_create_files; ops->setup = nmi_setup; ops->shutdown = nmi_shutdown; ops->start = nmi_start; ops->stop = nmi_stop; ops->cpu_type = cpu_type; + + if (model->init) + ret = model->init(ops); + if (ret) + return ret; + + init_sysfs(); + using_nmi = 1; printk(KERN_INFO "oprofile: using NMI interrupt.\n"); return 0; } void op_nmi_exit(void) { - if (using_nmi) + if (using_nmi) { exit_sysfs(); +#ifdef CONFIG_SMP + unregister_cpu_notifier(&oprofile_cpu_nb); +#endif + } + if (model->exit) + model->exit(); }