diff options
Diffstat (limited to 'arch/x86/oprofile')
| -rw-r--r-- | arch/x86/oprofile/Makefile | 3 | ||||
| -rw-r--r-- | arch/x86/oprofile/backtrace.c | 36 | ||||
| -rw-r--r-- | arch/x86/oprofile/init.c | 25 | ||||
| -rw-r--r-- | arch/x86/oprofile/nmi_int.c | 173 | ||||
| -rw-r--r-- | arch/x86/oprofile/nmi_timer_int.c | 69 | ||||
| -rw-r--r-- | arch/x86/oprofile/op_counter.h | 1 | ||||
| -rw-r--r-- | arch/x86/oprofile/op_model_amd.c | 285 | ||||
| -rw-r--r-- | arch/x86/oprofile/op_model_p4.c | 4 | ||||
| -rw-r--r-- | arch/x86/oprofile/op_model_ppro.c | 35 | ||||
| -rw-r--r-- | arch/x86/oprofile/op_x86_model.h | 1 |
10 files changed, 167 insertions, 465 deletions
diff --git a/arch/x86/oprofile/Makefile b/arch/x86/oprofile/Makefile index 446902b2a6b..1599f568f0e 100644 --- a/arch/x86/oprofile/Makefile +++ b/arch/x86/oprofile/Makefile @@ -4,9 +4,8 @@ DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \ oprof.o cpu_buffer.o buffer_sync.o \ event_buffer.o oprofile_files.o \ oprofilefs.o oprofile_stats.o \ - timer_int.o ) + timer_int.o nmi_timer_int.o ) oprofile-y := $(DRIVER_OBJS) init.o backtrace.o oprofile-$(CONFIG_X86_LOCAL_APIC) += nmi_int.o op_model_amd.o \ op_model_ppro.o op_model_p4.o -oprofile-$(CONFIG_X86_IO_APIC) += nmi_timer_int.o diff --git a/arch/x86/oprofile/backtrace.c b/arch/x86/oprofile/backtrace.c index 2d49d4e19a3..5d04be5efb6 100644 --- a/arch/x86/oprofile/backtrace.c +++ b/arch/x86/oprofile/backtrace.c @@ -11,21 +11,11 @@ #include <linux/oprofile.h> #include <linux/sched.h> #include <linux/mm.h> -#include <asm/ptrace.h> -#include <asm/uaccess.h> -#include <asm/stacktrace.h> #include <linux/compat.h> +#include <linux/uaccess.h> -static void backtrace_warning_symbol(void *data, char *msg, - unsigned long symbol) -{ - /* Ignore warnings */ -} - -static void backtrace_warning(void *data, char *msg) -{ - /* Ignore warnings */ -} +#include <asm/ptrace.h> +#include <asm/stacktrace.h> static int backtrace_stack(void *data, char *name) { @@ -42,8 +32,6 @@ static void backtrace_address(void *data, unsigned long addr, int reliable) } static struct stacktrace_ops backtrace_ops = { - .warning = backtrace_warning, - .warning_symbol = backtrace_warning_symbol, .stack = backtrace_stack, .address = backtrace_address, .walk_stack = print_context_stack, @@ -53,13 +41,13 @@ static struct stacktrace_ops backtrace_ops = { static struct stack_frame_ia32 * dump_user_backtrace_32(struct stack_frame_ia32 *head) { + /* Also check accessibility of one struct frame_head beyond: */ struct stack_frame_ia32 bufhead[2]; struct stack_frame_ia32 *fp; + unsigned long bytes; - /* Also check accessibility of one struct frame_head beyond */ - if (!access_ok(VERIFY_READ, head, sizeof(bufhead))) - return NULL; - if (__copy_from_user_inatomic(bufhead, head, sizeof(bufhead))) + bytes = copy_from_user_nmi(bufhead, head, sizeof(bufhead)); + if (bytes != 0) return NULL; fp = (struct stack_frame_ia32 *) compat_ptr(bufhead[0].next_frame); @@ -79,7 +67,7 @@ x86_backtrace_32(struct pt_regs * const regs, unsigned int depth) { struct stack_frame_ia32 *head; - /* User process is 32-bit */ + /* User process is IA32 */ if (!current || !test_thread_flag(TIF_IA32)) return 0; @@ -100,12 +88,12 @@ x86_backtrace_32(struct pt_regs * const regs, unsigned int depth) static struct stack_frame *dump_user_backtrace(struct stack_frame *head) { + /* Also check accessibility of one struct frame_head beyond: */ struct stack_frame bufhead[2]; + unsigned long bytes; - /* Also check accessibility of one struct stack_frame beyond */ - if (!access_ok(VERIFY_READ, head, sizeof(bufhead))) - return NULL; - if (__copy_from_user_inatomic(bufhead, head, sizeof(bufhead))) + bytes = copy_from_user_nmi(bufhead, head, sizeof(bufhead)); + if (bytes != 0) return NULL; oprofile_add_trace(bufhead[0].return_address); diff --git a/arch/x86/oprofile/init.c b/arch/x86/oprofile/init.c index cdfe4c54dec..9e138d00ad3 100644 --- a/arch/x86/oprofile/init.c +++ b/arch/x86/oprofile/init.c @@ -16,34 +16,23 @@ * with the NMI mode driver. */ +#ifdef CONFIG_X86_LOCAL_APIC extern int op_nmi_init(struct oprofile_operations *ops); -extern int op_nmi_timer_init(struct oprofile_operations *ops); extern void op_nmi_exit(void); -extern void x86_backtrace(struct pt_regs * const regs, unsigned int depth); +#else +static int op_nmi_init(struct oprofile_operations *ops) { return -ENODEV; } +static void op_nmi_exit(void) { } +#endif +extern void x86_backtrace(struct pt_regs * const regs, unsigned int depth); int __init oprofile_arch_init(struct oprofile_operations *ops) { - int ret; - - ret = -ENODEV; - -#ifdef CONFIG_X86_LOCAL_APIC - ret = op_nmi_init(ops); -#endif -#ifdef CONFIG_X86_IO_APIC - if (ret < 0) - ret = op_nmi_timer_init(ops); -#endif ops->backtrace = x86_backtrace; - - return ret; + return op_nmi_init(ops); } - void oprofile_arch_exit(void) { -#ifdef CONFIG_X86_LOCAL_APIC op_nmi_exit(); -#endif } diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c index 4e8baad36d3..379e8bd0dee 100644 --- a/arch/x86/oprofile/nmi_int.c +++ b/arch/x86/oprofile/nmi_int.c @@ -15,7 +15,7 @@ #include <linux/notifier.h> #include <linux/smp.h> #include <linux/oprofile.h> -#include <linux/sysdev.h> +#include <linux/syscore_ops.h> #include <linux/slab.h> #include <linux/moduleparam.h> #include <linux/kdebug.h> @@ -49,35 +49,27 @@ u64 op_x86_get_ctrl(struct op_x86_model_spec const *model, val |= counter_config->user ? ARCH_PERFMON_EVENTSEL_USR : 0; val |= counter_config->kernel ? ARCH_PERFMON_EVENTSEL_OS : 0; val |= (counter_config->unit_mask & 0xFF) << 8; + counter_config->extra &= (ARCH_PERFMON_EVENTSEL_INV | + ARCH_PERFMON_EVENTSEL_EDGE | + ARCH_PERFMON_EVENTSEL_CMASK); + val |= counter_config->extra; event &= model->event_mask ? model->event_mask : 0xFF; val |= event & 0xFF; - val |= (event & 0x0F00) << 24; + val |= (u64)(event & 0x0F00) << 24; return val; } -static int profile_exceptions_notify(struct notifier_block *self, - unsigned long val, void *data) +static int profile_exceptions_notify(unsigned int val, struct pt_regs *regs) { - struct die_args *args = (struct die_args *)data; - int ret = NOTIFY_DONE; - - switch (val) { - case DIE_NMI: - case DIE_NMI_IPI: - if (ctr_running) - model->check_ctrs(args->regs, &__get_cpu_var(cpu_msrs)); - else if (!nmi_enabled) - break; - else - model->stop(&__get_cpu_var(cpu_msrs)); - ret = NOTIFY_STOP; - break; - default: - break; - } - return ret; + if (ctr_running) + model->check_ctrs(regs, &__get_cpu_var(cpu_msrs)); + else if (!nmi_enabled) + return NMI_DONE; + else + model->stop(&__get_cpu_var(cpu_msrs)); + return NMI_HANDLED; } static void nmi_cpu_save_registers(struct op_msrs *msrs) @@ -109,8 +101,10 @@ static void nmi_cpu_start(void *dummy) static int nmi_start(void) { get_online_cpus(); - on_each_cpu(nmi_cpu_start, NULL, 1); ctr_running = 1; + /* make ctr_running visible to the nmi handler: */ + smp_mb(); + on_each_cpu(nmi_cpu_start, NULL, 1); put_online_cpus(); return 0; } @@ -143,7 +137,7 @@ static inline int has_mux(void) inline int op_x86_phys_to_virt(int phys) { - return __get_cpu_var(switch_index) + phys; + return __this_cpu_read(switch_index) + phys; } inline int op_x86_virt_to_phys(int virt) @@ -350,20 +344,14 @@ static void nmi_cpu_setup(void *dummy) int cpu = smp_processor_id(); struct op_msrs *msrs = &per_cpu(cpu_msrs, cpu); nmi_cpu_save_registers(msrs); - spin_lock(&oprofilefs_lock); + raw_spin_lock(&oprofilefs_lock); model->setup_ctrs(model, msrs); nmi_cpu_setup_mux(cpu, msrs); - spin_unlock(&oprofilefs_lock); + raw_spin_unlock(&oprofilefs_lock); per_cpu(saved_lvtpc, cpu) = apic_read(APIC_LVTPC); apic_write(APIC_LVTPC, APIC_DM_NMI); } -static struct notifier_block profile_exceptions_nb = { - .notifier_call = profile_exceptions_notify, - .next = NULL, - .priority = 2 -}; - static void nmi_cpu_restore_registers(struct op_msrs *msrs) { struct op_msr *counters = msrs->counters; @@ -397,8 +385,6 @@ static void nmi_cpu_shutdown(void *dummy) apic_write(APIC_LVTPC, per_cpu(saved_lvtpc, cpu)); apic_write(APIC_LVTERR, v); nmi_cpu_restore_registers(msrs); - if (model->cpu_down) - model->cpu_down(); } static void nmi_cpu_up(void *dummy) @@ -417,7 +403,7 @@ static void nmi_cpu_down(void *dummy) nmi_cpu_shutdown(dummy); } -static int nmi_create_files(struct super_block *sb, struct dentry *root) +static int nmi_create_files(struct dentry *root) { unsigned int i; @@ -434,13 +420,14 @@ static int nmi_create_files(struct super_block *sb, struct dentry *root) continue; 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); + dir = oprofilefs_mkdir(root, buf); + oprofilefs_create_ulong(dir, "enabled", &counter_config[i].enabled); + oprofilefs_create_ulong(dir, "event", &counter_config[i].event); + oprofilefs_create_ulong(dir, "count", &counter_config[i].count); + oprofilefs_create_ulong(dir, "unit_mask", &counter_config[i].unit_mask); + oprofilefs_create_ulong(dir, "kernel", &counter_config[i].kernel); + oprofilefs_create_ulong(dir, "user", &counter_config[i].user); + oprofilefs_create_ulong(dir, "extra", &counter_config[i].extra); } return 0; @@ -500,17 +487,26 @@ static int nmi_setup(void) nmi_enabled = 0; ctr_running = 0; - barrier(); - err = register_die_notifier(&profile_exceptions_nb); + /* make variables visible to the nmi handler: */ + smp_mb(); + err = register_nmi_handler(NMI_LOCAL, profile_exceptions_notify, + 0, "oprofile"); if (err) goto fail; + cpu_notifier_register_begin(); + + /* Use get/put_online_cpus() to protect 'nmi_enabled' */ get_online_cpus(); - register_cpu_notifier(&oprofile_cpu_nb); - on_each_cpu(nmi_cpu_setup, NULL, 1); nmi_enabled = 1; + /* make nmi_enabled visible to the nmi handler: */ + smp_mb(); + on_each_cpu(nmi_cpu_setup, NULL, 1); + __register_cpu_notifier(&oprofile_cpu_nb); put_online_cpus(); + cpu_notifier_register_done(); + return 0; fail: free_msrs(); @@ -521,14 +517,21 @@ static void nmi_shutdown(void) { struct op_msrs *msrs; + cpu_notifier_register_begin(); + + /* Use get/put_online_cpus() to protect 'nmi_enabled' & 'ctr_running' */ get_online_cpus(); - unregister_cpu_notifier(&oprofile_cpu_nb); on_each_cpu(nmi_cpu_shutdown, NULL, 1); nmi_enabled = 0; ctr_running = 0; + __unregister_cpu_notifier(&oprofile_cpu_nb); put_online_cpus(); - barrier(); - unregister_die_notifier(&profile_exceptions_nb); + + cpu_notifier_register_done(); + + /* make variables visible to the nmi handler: */ + smp_mb(); + unregister_nmi_handler(NMI_LOCAL, "oprofile"); msrs = &get_cpu_var(cpu_msrs); model->shutdown(msrs); free_msrs(); @@ -537,7 +540,7 @@ static void nmi_shutdown(void) #ifdef CONFIG_PM -static int nmi_suspend(struct sys_device *dev, pm_message_t state) +static int nmi_suspend(void) { /* Only one CPU left, just stop that one */ if (nmi_enabled == 1) @@ -545,49 +548,31 @@ static int nmi_suspend(struct sys_device *dev, pm_message_t state) return 0; } -static int nmi_resume(struct sys_device *dev) +static void nmi_resume(void) { if (nmi_enabled == 1) nmi_cpu_start(NULL); - return 0; } -static struct sysdev_class oprofile_sysclass = { - .name = "oprofile", +static struct syscore_ops oprofile_syscore_ops = { .resume = nmi_resume, .suspend = nmi_suspend, }; -static struct sys_device device_oprofile = { - .id = 0, - .cls = &oprofile_sysclass, -}; - -static int __init init_sysfs(void) +static void __init init_suspend_resume(void) { - int error; - - error = sysdev_class_register(&oprofile_sysclass); - if (error) - return error; - - error = sysdev_register(&device_oprofile); - if (error) - sysdev_class_unregister(&oprofile_sysclass); - - return error; + register_syscore_ops(&oprofile_syscore_ops); } -static void exit_sysfs(void) +static void exit_suspend_resume(void) { - sysdev_unregister(&device_oprofile); - sysdev_class_unregister(&oprofile_sysclass); + unregister_syscore_ops(&oprofile_syscore_ops); } #else -static inline int init_sysfs(void) { return 0; } -static inline void exit_sysfs(void) { } +static inline void init_suspend_resume(void) { } +static inline void exit_suspend_resume(void) { } #endif /* CONFIG_PM */ @@ -621,24 +606,36 @@ static int __init p4_init(char **cpu_type) return 0; } -static int force_arch_perfmon; -static int force_cpu_type(const char *str, struct kernel_param *kp) +enum __force_cpu_type { + reserved = 0, /* do not force */ + timer, + arch_perfmon, +}; + +static int force_cpu_type; + +static int set_cpu_type(const char *str, struct kernel_param *kp) { - if (!strcmp(str, "arch_perfmon")) { - force_arch_perfmon = 1; + if (!strcmp(str, "timer")) { + force_cpu_type = timer; + printk(KERN_INFO "oprofile: forcing NMI timer mode\n"); + } else if (!strcmp(str, "arch_perfmon")) { + force_cpu_type = arch_perfmon; printk(KERN_INFO "oprofile: forcing architectural perfmon\n"); + } else { + force_cpu_type = 0; } return 0; } -module_param_call(cpu_type, force_cpu_type, NULL, NULL, 0); +module_param_call(cpu_type, set_cpu_type, NULL, NULL, 0); static int __init ppro_init(char **cpu_type) { __u8 cpu_model = boot_cpu_data.x86_model; struct op_x86_model_spec *spec = &op_ppro_spec; /* default */ - if (force_arch_perfmon && cpu_has_arch_perfmon) + if (force_cpu_type == arch_perfmon && cpu_has_arch_perfmon) return 0; /* @@ -705,6 +702,9 @@ int __init op_nmi_init(struct oprofile_operations *ops) if (!cpu_has_apic) return -ENODEV; + if (force_cpu_type == timer) + return -ENODEV; + switch (vendor) { case X86_VENDOR_AMD: /* Needs to be at least an Athlon (or hammer in 32bit mode) */ @@ -732,6 +732,9 @@ int __init op_nmi_init(struct oprofile_operations *ops) case 0x14: cpu_type = "x86-64/family14h"; break; + case 0x15: + cpu_type = "x86-64/family15h"; + break; default: return -ENODEV; } @@ -787,9 +790,7 @@ int __init op_nmi_init(struct oprofile_operations *ops) mux_init(ops); - ret = init_sysfs(); - if (ret) - return ret; + init_suspend_resume(); printk(KERN_INFO "oprofile: using NMI interrupt.\n"); return 0; @@ -797,5 +798,5 @@ int __init op_nmi_init(struct oprofile_operations *ops) void op_nmi_exit(void) { - exit_sysfs(); + exit_suspend_resume(); } diff --git a/arch/x86/oprofile/nmi_timer_int.c b/arch/x86/oprofile/nmi_timer_int.c deleted file mode 100644 index e3ecb71b579..00000000000 --- a/arch/x86/oprofile/nmi_timer_int.c +++ /dev/null @@ -1,69 +0,0 @@ -/** - * @file nmi_timer_int.c - * - * @remark Copyright 2003 OProfile authors - * @remark Read the file COPYING - * - * @author Zwane Mwaikambo <zwane@linuxpower.ca> - */ - -#include <linux/init.h> -#include <linux/smp.h> -#include <linux/errno.h> -#include <linux/oprofile.h> -#include <linux/rcupdate.h> -#include <linux/kdebug.h> - -#include <asm/nmi.h> -#include <asm/apic.h> -#include <asm/ptrace.h> - -static int profile_timer_exceptions_notify(struct notifier_block *self, - unsigned long val, void *data) -{ - struct die_args *args = (struct die_args *)data; - int ret = NOTIFY_DONE; - - switch (val) { - case DIE_NMI: - oprofile_add_sample(args->regs, 0); - ret = NOTIFY_STOP; - break; - default: - break; - } - return ret; -} - -static struct notifier_block profile_timer_exceptions_nb = { - .notifier_call = profile_timer_exceptions_notify, - .next = NULL, - .priority = 0 -}; - -static int timer_start(void) -{ - if (register_die_notifier(&profile_timer_exceptions_nb)) - return 1; - return 0; -} - - -static void timer_stop(void) -{ - unregister_die_notifier(&profile_timer_exceptions_nb); - synchronize_sched(); /* Allow already-started NMIs to complete. */ -} - - -int __init op_nmi_timer_init(struct oprofile_operations *ops) -{ - if ((nmi_watchdog != NMI_IO_APIC) || (atomic_read(&nmi_active) <= 0)) - return -ENODEV; - - ops->start = timer_start; - ops->stop = timer_stop; - ops->cpu_type = "timer"; - printk(KERN_INFO "oprofile: using NMI timer interrupt.\n"); - return 0; -} diff --git a/arch/x86/oprofile/op_counter.h b/arch/x86/oprofile/op_counter.h index e28398df0df..0b7b7b179cb 100644 --- a/arch/x86/oprofile/op_counter.h +++ b/arch/x86/oprofile/op_counter.h @@ -22,6 +22,7 @@ struct op_counter_config { unsigned long kernel; unsigned long user; unsigned long unit_mask; + unsigned long extra; }; extern struct op_counter_config counter_config[]; diff --git a/arch/x86/oprofile/op_model_amd.c b/arch/x86/oprofile/op_model_amd.c index a011bcc0f94..50d86c0e9ba 100644 --- a/arch/x86/oprofile/op_model_amd.c +++ b/arch/x86/oprofile/op_model_amd.c @@ -29,11 +29,10 @@ #include "op_x86_model.h" #include "op_counter.h" -#define NUM_COUNTERS 4 #ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX -#define NUM_VIRT_COUNTERS 32 +#define NUM_VIRT_COUNTERS 32 #else -#define NUM_VIRT_COUNTERS NUM_COUNTERS +#define NUM_VIRT_COUNTERS 0 #endif #define OP_EVENT_MASK 0x0FFF @@ -41,7 +40,8 @@ #define MSR_AMD_EVENTSEL_RESERVED ((0xFFFFFCF0ULL<<32)|(1ULL<<21)) -static unsigned long reset_value[NUM_VIRT_COUNTERS]; +static int num_counters; +static unsigned long reset_value[OP_MAX_COUNTER]; #define IBS_FETCH_SIZE 6 #define IBS_OP_SIZE 12 @@ -68,62 +68,12 @@ static struct ibs_config ibs_config; static struct ibs_state ibs_state; /* - * IBS cpuid feature detection - */ - -#define IBS_CPUID_FEATURES 0x8000001b - -/* - * Same bit mask as for IBS cpuid feature flags (Fn8000_001B_EAX), but - * bit 0 is used to indicate the existence of IBS. - */ -#define IBS_CAPS_AVAIL (1U<<0) -#define IBS_CAPS_FETCHSAM (1U<<1) -#define IBS_CAPS_OPSAM (1U<<2) -#define IBS_CAPS_RDWROPCNT (1U<<3) -#define IBS_CAPS_OPCNT (1U<<4) -#define IBS_CAPS_BRNTRGT (1U<<5) -#define IBS_CAPS_OPCNTEXT (1U<<6) - -#define IBS_CAPS_DEFAULT (IBS_CAPS_AVAIL \ - | IBS_CAPS_FETCHSAM \ - | IBS_CAPS_OPSAM) - -/* - * IBS APIC setup - */ -#define IBSCTL 0x1cc -#define IBSCTL_LVT_OFFSET_VALID (1ULL<<8) -#define IBSCTL_LVT_OFFSET_MASK 0x0F - -/* * IBS randomization macros */ #define IBS_RANDOM_BITS 12 #define IBS_RANDOM_MASK ((1ULL << IBS_RANDOM_BITS) - 1) #define IBS_RANDOM_MAXCNT_OFFSET (1ULL << (IBS_RANDOM_BITS - 5)) -static u32 get_ibs_caps(void) -{ - u32 ibs_caps; - unsigned int max_level; - - if (!boot_cpu_has(X86_FEATURE_IBS)) - return 0; - - /* check IBS cpuid feature flags */ - max_level = cpuid_eax(0x80000000); - if (max_level < IBS_CPUID_FEATURES) - return IBS_CAPS_DEFAULT; - - ibs_caps = cpuid_eax(IBS_CPUID_FEATURES); - if (!(ibs_caps & IBS_CAPS_AVAIL)) - /* cpuid flags not valid */ - return IBS_CAPS_DEFAULT; - - return ibs_caps; -} - /* * 16-bit Linear Feedback Shift Register (LFSR) * @@ -314,70 +264,6 @@ static void op_amd_stop_ibs(void) wrmsrl(MSR_AMD64_IBSOPCTL, 0); } -static inline int eilvt_is_available(int offset) -{ - /* check if we may assign a vector */ - return !setup_APIC_eilvt(offset, 0, APIC_EILVT_MSG_NMI, 1); -} - -static inline int ibs_eilvt_valid(void) -{ - int offset; - u64 val; - - rdmsrl(MSR_AMD64_IBSCTL, val); - offset = val & IBSCTL_LVT_OFFSET_MASK; - - if (!(val & IBSCTL_LVT_OFFSET_VALID)) { - pr_err(FW_BUG "cpu %d, invalid IBS interrupt offset %d (MSR%08X=0x%016llx)\n", - smp_processor_id(), offset, MSR_AMD64_IBSCTL, val); - return 0; - } - - if (!eilvt_is_available(offset)) { - pr_err(FW_BUG "cpu %d, IBS interrupt offset %d not available (MSR%08X=0x%016llx)\n", - smp_processor_id(), offset, MSR_AMD64_IBSCTL, val); - return 0; - } - - return 1; -} - -static inline int get_ibs_offset(void) -{ - u64 val; - - rdmsrl(MSR_AMD64_IBSCTL, val); - if (!(val & IBSCTL_LVT_OFFSET_VALID)) - return -EINVAL; - - return val & IBSCTL_LVT_OFFSET_MASK; -} - -static void setup_APIC_ibs(void) -{ - int offset; - - offset = get_ibs_offset(); - if (offset < 0) - goto failed; - - if (!setup_APIC_eilvt(offset, 0, APIC_EILVT_MSG_NMI, 0)) - return; -failed: - pr_warn("oprofile: IBS APIC setup failed on cpu #%d\n", - smp_processor_id()); -} - -static void clear_APIC_ibs(void) -{ - int offset; - - offset = get_ibs_offset(); - if (offset >= 0) - setup_APIC_eilvt(offset, 0, APIC_EILVT_MSG_FIX, 1); -} - #ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX static void op_mux_switch_ctrl(struct op_x86_model_spec const *model, @@ -387,7 +273,7 @@ static void op_mux_switch_ctrl(struct op_x86_model_spec const *model, int i; /* enable active counters */ - for (i = 0; i < NUM_COUNTERS; ++i) { + for (i = 0; i < num_counters; ++i) { int virt = op_x86_phys_to_virt(i); if (!reset_value[virt]) continue; @@ -406,7 +292,7 @@ static void op_amd_shutdown(struct op_msrs const * const msrs) { int i; - for (i = 0; i < NUM_COUNTERS; ++i) { + for (i = 0; i < num_counters; ++i) { if (!msrs->counters[i].addr) continue; release_perfctr_nmi(MSR_K7_PERFCTR0 + i); @@ -418,7 +304,7 @@ static int op_amd_fill_in_addresses(struct op_msrs * const msrs) { int i; - for (i = 0; i < NUM_COUNTERS; i++) { + for (i = 0; i < num_counters; i++) { if (!reserve_perfctr_nmi(MSR_K7_PERFCTR0 + i)) goto fail; if (!reserve_evntsel_nmi(MSR_K7_EVNTSEL0 + i)) { @@ -426,8 +312,13 @@ static int op_amd_fill_in_addresses(struct op_msrs * const msrs) goto fail; } /* both registers must be reserved */ - msrs->counters[i].addr = MSR_K7_PERFCTR0 + i; - msrs->controls[i].addr = MSR_K7_EVNTSEL0 + i; + if (num_counters == AMD64_NUM_COUNTERS_CORE) { + msrs->counters[i].addr = MSR_F15H_PERF_CTR + (i << 1); + msrs->controls[i].addr = MSR_F15H_PERF_CTL + (i << 1); + } else { + msrs->controls[i].addr = MSR_K7_EVNTSEL0 + i; + msrs->counters[i].addr = MSR_K7_PERFCTR0 + i; + } continue; fail: if (!counter_config[i].enabled) @@ -447,7 +338,7 @@ static void op_amd_setup_ctrs(struct op_x86_model_spec const *model, int i; /* setup reset_value */ - for (i = 0; i < NUM_VIRT_COUNTERS; ++i) { + for (i = 0; i < OP_MAX_COUNTER; ++i) { if (counter_config[i].enabled && msrs->counters[op_x86_virt_to_phys(i)].addr) reset_value[i] = counter_config[i].count; @@ -456,7 +347,7 @@ static void op_amd_setup_ctrs(struct op_x86_model_spec const *model, } /* clear all counters */ - for (i = 0; i < NUM_COUNTERS; ++i) { + for (i = 0; i < num_counters; ++i) { if (!msrs->controls[i].addr) continue; rdmsrl(msrs->controls[i].addr, val); @@ -472,7 +363,7 @@ static void op_amd_setup_ctrs(struct op_x86_model_spec const *model, } /* enable active counters */ - for (i = 0; i < NUM_COUNTERS; ++i) { + for (i = 0; i < num_counters; ++i) { int virt = op_x86_phys_to_virt(i); if (!reset_value[virt]) continue; @@ -486,15 +377,6 @@ static void op_amd_setup_ctrs(struct op_x86_model_spec const *model, val |= op_x86_get_ctrl(model, &counter_config[virt]); wrmsrl(msrs->controls[i].addr, val); } - - if (ibs_caps) - setup_APIC_ibs(); -} - -static void op_amd_cpu_shutdown(void) -{ - if (ibs_caps) - clear_APIC_ibs(); } static int op_amd_check_ctrs(struct pt_regs * const regs, @@ -503,7 +385,7 @@ static int op_amd_check_ctrs(struct pt_regs * const regs, u64 val; int i; - for (i = 0; i < NUM_COUNTERS; ++i) { + for (i = 0; i < num_counters; ++i) { int virt = op_x86_phys_to_virt(i); if (!reset_value[virt]) continue; @@ -526,7 +408,7 @@ static void op_amd_start(struct op_msrs const * const msrs) u64 val; int i; - for (i = 0; i < NUM_COUNTERS; ++i) { + for (i = 0; i < num_counters; ++i) { if (!reset_value[op_x86_phys_to_virt(i)]) continue; rdmsrl(msrs->controls[i].addr, val); @@ -546,7 +428,7 @@ static void op_amd_stop(struct op_msrs const * const msrs) * Subtle: stop on all counters to avoid race with setting our * pm callback */ - for (i = 0; i < NUM_COUNTERS; ++i) { + for (i = 0; i < num_counters; ++i) { if (!reset_value[op_x86_phys_to_virt(i)]) continue; rdmsrl(msrs->controls[i].addr, val); @@ -557,80 +439,11 @@ static void op_amd_stop(struct op_msrs const * const msrs) op_amd_stop_ibs(); } -static int setup_ibs_ctl(int ibs_eilvt_off) -{ - struct pci_dev *cpu_cfg; - int nodes; - u32 value = 0; - - nodes = 0; - cpu_cfg = NULL; - do { - cpu_cfg = pci_get_device(PCI_VENDOR_ID_AMD, - PCI_DEVICE_ID_AMD_10H_NB_MISC, - cpu_cfg); - if (!cpu_cfg) - break; - ++nodes; - pci_write_config_dword(cpu_cfg, IBSCTL, ibs_eilvt_off - | IBSCTL_LVT_OFFSET_VALID); - pci_read_config_dword(cpu_cfg, IBSCTL, &value); - if (value != (ibs_eilvt_off | IBSCTL_LVT_OFFSET_VALID)) { - pci_dev_put(cpu_cfg); - printk(KERN_DEBUG "Failed to setup IBS LVT offset, " - "IBSCTL = 0x%08x\n", value); - return -EINVAL; - } - } while (1); - - if (!nodes) { - printk(KERN_DEBUG "No CPU node configured for IBS\n"); - return -ENODEV; - } - - return 0; -} - -static int force_ibs_eilvt_setup(void) -{ - int i; - int ret; - - /* find the next free available EILVT entry */ - for (i = 1; i < 4; i++) { - if (!eilvt_is_available(i)) - continue; - ret = setup_ibs_ctl(i); - if (ret) - return ret; - return 0; - } - - printk(KERN_DEBUG "No EILVT entry available\n"); - - return -EBUSY; -} - -static int __init_ibs_nmi(void) -{ - int ret; - - if (ibs_eilvt_valid()) - return 0; - - ret = force_ibs_eilvt_setup(); - if (ret) - return ret; - - if (!ibs_eilvt_valid()) - return -EFAULT; - - pr_err(FW_BUG "workaround enabled for IBS LVT offset\n"); - - return 0; -} +/* + * check and reserve APIC extended interrupt LVT offset for IBS if + * available + */ -/* initialize the APIC for the IBS interrupts if available */ static void init_ibs(void) { ibs_caps = get_ibs_caps(); @@ -638,25 +451,19 @@ static void init_ibs(void) if (!ibs_caps) return; - if (__init_ibs_nmi()) { - ibs_caps = 0; - return; - } - - printk(KERN_INFO "oprofile: AMD IBS detected (0x%08x)\n", - (unsigned)ibs_caps); + printk(KERN_INFO "oprofile: AMD IBS detected (0x%08x)\n", ibs_caps); } -static int (*create_arch_files)(struct super_block *sb, struct dentry *root); +static int (*create_arch_files)(struct dentry *root); -static int setup_ibs_files(struct super_block *sb, struct dentry *root) +static int setup_ibs_files(struct dentry *root) { struct dentry *dir; int ret = 0; /* architecture specific files */ if (create_arch_files) - ret = create_arch_files(sb, root); + ret = create_arch_files(root); if (ret) return ret; @@ -672,50 +479,60 @@ static int setup_ibs_files(struct super_block *sb, struct dentry *root) ibs_config.max_cnt_op = 250000; if (ibs_caps & IBS_CAPS_FETCHSAM) { - dir = oprofilefs_mkdir(sb, root, "ibs_fetch"); - oprofilefs_create_ulong(sb, dir, "enable", + dir = oprofilefs_mkdir(root, "ibs_fetch"); + oprofilefs_create_ulong(dir, "enable", &ibs_config.fetch_enabled); - oprofilefs_create_ulong(sb, dir, "max_count", + oprofilefs_create_ulong(dir, "max_count", &ibs_config.max_cnt_fetch); - oprofilefs_create_ulong(sb, dir, "rand_enable", + oprofilefs_create_ulong(dir, "rand_enable", &ibs_config.rand_en); } if (ibs_caps & IBS_CAPS_OPSAM) { - dir = oprofilefs_mkdir(sb, root, "ibs_op"); - oprofilefs_create_ulong(sb, dir, "enable", + dir = oprofilefs_mkdir(root, "ibs_op"); + oprofilefs_create_ulong(dir, "enable", &ibs_config.op_enabled); - oprofilefs_create_ulong(sb, dir, "max_count", + oprofilefs_create_ulong(dir, "max_count", &ibs_config.max_cnt_op); if (ibs_caps & IBS_CAPS_OPCNT) - oprofilefs_create_ulong(sb, dir, "dispatched_ops", + oprofilefs_create_ulong(dir, "dispatched_ops", &ibs_config.dispatched_ops); if (ibs_caps & IBS_CAPS_BRNTRGT) - oprofilefs_create_ulong(sb, dir, "branch_target", + oprofilefs_create_ulong(dir, "branch_target", &ibs_config.branch_target); } return 0; } +struct op_x86_model_spec op_amd_spec; + static int op_amd_init(struct oprofile_operations *ops) { init_ibs(); create_arch_files = ops->create_files; ops->create_files = setup_ibs_files; + + if (boot_cpu_data.x86 == 0x15) { + num_counters = AMD64_NUM_COUNTERS_CORE; + } else { + num_counters = AMD64_NUM_COUNTERS; + } + + op_amd_spec.num_counters = num_counters; + op_amd_spec.num_controls = num_counters; + op_amd_spec.num_virt_counters = max(num_counters, NUM_VIRT_COUNTERS); + return 0; } struct op_x86_model_spec op_amd_spec = { - .num_counters = NUM_COUNTERS, - .num_controls = NUM_COUNTERS, - .num_virt_counters = NUM_VIRT_COUNTERS, + /* num_counters/num_controls filled in at runtime */ .reserved = MSR_AMD_EVENTSEL_RESERVED, .event_mask = OP_EVENT_MASK, .init = op_amd_init, .fill_in_addresses = &op_amd_fill_in_addresses, .setup_ctrs = &op_amd_setup_ctrs, - .cpu_down = &op_amd_cpu_shutdown, .check_ctrs = &op_amd_check_ctrs, .start = &op_amd_start, .stop = &op_amd_stop, diff --git a/arch/x86/oprofile/op_model_p4.c b/arch/x86/oprofile/op_model_p4.c index 182558dd551..98ab13058f8 100644 --- a/arch/x86/oprofile/op_model_p4.c +++ b/arch/x86/oprofile/op_model_p4.c @@ -11,7 +11,7 @@ #include <linux/oprofile.h> #include <linux/smp.h> #include <linux/ptrace.h> -#include <linux/nmi.h> +#include <asm/nmi.h> #include <asm/msr.h> #include <asm/fixmap.h> #include <asm/apic.h> @@ -50,7 +50,7 @@ static inline void setup_num_counters(void) #endif } -static int inline addr_increment(void) +static inline int addr_increment(void) { #ifdef CONFIG_SMP return smp_num_siblings == 2 ? 2 : 1; diff --git a/arch/x86/oprofile/op_model_ppro.c b/arch/x86/oprofile/op_model_ppro.c index d769cda5408..d90528ea541 100644 --- a/arch/x86/oprofile/op_model_ppro.c +++ b/arch/x86/oprofile/op_model_ppro.c @@ -28,7 +28,7 @@ static int counter_width = 32; #define MSR_PPRO_EVENTSEL_RESERVED ((0xFFFFFFFFULL<<32)|(1ULL<<21)) -static u64 *reset_value; +static u64 reset_value[OP_MAX_COUNTER]; static void ppro_shutdown(struct op_msrs const * const msrs) { @@ -40,10 +40,6 @@ static void ppro_shutdown(struct op_msrs const * const msrs) release_perfctr_nmi(MSR_P6_PERFCTR0 + i); release_evntsel_nmi(MSR_P6_EVNTSEL0 + i); } - if (reset_value) { - kfree(reset_value); - reset_value = NULL; - } } static int ppro_fill_in_addresses(struct op_msrs * const msrs) @@ -79,13 +75,6 @@ static void ppro_setup_ctrs(struct op_x86_model_spec const *model, u64 val; int i; - if (!reset_value) { - reset_value = kzalloc(sizeof(reset_value[0]) * num_counters, - GFP_ATOMIC); - if (!reset_value) - return; - } - if (cpu_has_arch_perfmon) { union cpuid10_eax eax; eax.full = cpuid_eax(0xa); @@ -95,8 +84,8 @@ static void ppro_setup_ctrs(struct op_x86_model_spec const *model, * counter width: */ if (!(eax.split.version_id == 0 && - current_cpu_data.x86 == 6 && - current_cpu_data.x86_model == 15)) { + __this_cpu_read(cpu_info.x86) == 6 && + __this_cpu_read(cpu_info.x86_model) == 15)) { if (counter_width < eax.split.bit_width) counter_width = eax.split.bit_width; @@ -141,13 +130,6 @@ static int ppro_check_ctrs(struct pt_regs * const regs, u64 val; int i; - /* - * This can happen if perf counters are in use when - * we steal the die notifier NMI. - */ - if (unlikely(!reset_value)) - goto out; - for (i = 0; i < num_counters; ++i) { if (!reset_value[i]) continue; @@ -158,7 +140,6 @@ static int ppro_check_ctrs(struct pt_regs * const regs, wrmsrl(msrs->counters[i].addr, -reset_value[i]); } -out: /* Only P6 based Pentium M need to re-unmask the apic vector but it * doesn't hurt other P6 variant */ apic_write(APIC_LVTPC, apic_read(APIC_LVTPC) & ~APIC_LVT_MASKED); @@ -179,8 +160,6 @@ static void ppro_start(struct op_msrs const * const msrs) u64 val; int i; - if (!reset_value) - return; for (i = 0; i < num_counters; ++i) { if (reset_value[i]) { rdmsrl(msrs->controls[i].addr, val); @@ -196,8 +175,6 @@ static void ppro_stop(struct op_msrs const * const msrs) u64 val; int i; - if (!reset_value) - return; for (i = 0; i < num_counters; ++i) { if (!reset_value[i]) continue; @@ -235,14 +212,14 @@ static void arch_perfmon_setup_counters(void) eax.full = cpuid_eax(0xa); /* Workaround for BIOS bugs in 6/15. Taken from perfmon2 */ - if (eax.split.version_id == 0 && current_cpu_data.x86 == 6 && - current_cpu_data.x86_model == 15) { + if (eax.split.version_id == 0 && __this_cpu_read(cpu_info.x86) == 6 && + __this_cpu_read(cpu_info.x86_model) == 15) { eax.split.version_id = 2; eax.split.num_counters = 2; eax.split.bit_width = 40; } - num_counters = eax.split.num_counters; + num_counters = min((int)eax.split.num_counters, OP_MAX_COUNTER); op_arch_perfmon_spec.num_counters = num_counters; op_arch_perfmon_spec.num_controls = num_counters; diff --git a/arch/x86/oprofile/op_x86_model.h b/arch/x86/oprofile/op_x86_model.h index 89017fa1fd6..71e8a67337e 100644 --- a/arch/x86/oprofile/op_x86_model.h +++ b/arch/x86/oprofile/op_x86_model.h @@ -43,7 +43,6 @@ struct op_x86_model_spec { int (*fill_in_addresses)(struct op_msrs * const msrs); void (*setup_ctrs)(struct op_x86_model_spec const *model, struct op_msrs const * const msrs); - void (*cpu_down)(void); int (*check_ctrs)(struct pt_regs * const regs, struct op_msrs const * const msrs); void (*start)(struct op_msrs const * const msrs); |