X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=arch%2Fx86%2Foprofile%2Fnmi_int.c;h=7826dfcc842823a7a893b4e2831c34864597b1c7;hb=1241eb8f136bf3ea409f61590e7663465906d158;hp=114df508b407b78884a1c98e653a171b76f17d7c;hpb=59293c8ad54726150cf6178164311b004d615ce4;p=safe%2Fjmp%2Flinux-2.6

diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index 114df50..7826dfc 100644
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -24,133 +24,32 @@
 #include "op_counter.h"
 #include "op_x86_model.h"
 
-DEFINE_PER_CPU(int, switch_index);
-
 static struct op_x86_model_spec const *model;
 static DEFINE_PER_CPU(struct op_msrs, cpu_msrs);
 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);
-static void nmi_cpu_save_mpx_registers(struct op_msrs *msrs);
-static void nmi_cpu_restore_mpx_registers(struct op_msrs *msrs);
-
 /* 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_cpu_stop(NULL);
-	return 0;
-}
-
-static int nmi_resume(struct sys_device *dev)
-{
-	if (nmi_enabled == 1)
-		nmi_cpu_start(NULL);
-	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;
+/* common functions */
 
-	error = sysdev_class_register(&oprofile_sysclass);
-	if (!error)
-		error = sysdev_register(&device_oprofile);
-	return error;
-}
-
-static void exit_sysfs(void)
+u64 op_x86_get_ctrl(struct op_x86_model_spec const *model,
+		    struct op_counter_config *counter_config)
 {
-	sysdev_unregister(&device_oprofile);
-	sysdev_class_unregister(&oprofile_sysclass);
+	u64 val = 0;
+	u16 event = (u16)counter_config->event;
+
+	val |= ARCH_PERFMON_EVENTSEL_INT;
+	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;
+	event &= model->event_mask ? model->event_mask : 0xFF;
+	val |= event & 0xFF;
+	val |= (event & 0x0F00) << 24;
+
+	return val;
 }
 
-#else
-#define init_sysfs() do { } while (0)
-#define exit_sysfs() do { } while (0)
-#endif /* CONFIG_PM */
-
-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_hardware_counters;
-	if ((si > model->num_counters) || (counter_config[si].count == 0))
-		per_cpu(switch_index, smp_processor_id()) = 0;
-	else
-		per_cpu(switch_index, smp_processor_id()) = si;
-
-	nmi_cpu_restore_mpx_registers(msrs);
-	model->setup_ctrs(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_hardware_counters].count ? 0 : -EINVAL;
-}
-
-static int nmi_switch_event(void)
-{
-	if (nmi_multiplex_on() < 0)
-		return -EINVAL;
-
-	on_each_cpu(nmi_cpu_switch, NULL, 1);
-
-	return 0;
-}
 
 static int profile_exceptions_notify(struct notifier_block *self,
 				     unsigned long val, void *data)
@@ -161,8 +60,9 @@ static int profile_exceptions_notify(struct notifier_block *self,
 
 	switch (val) {
 	case DIE_NMI:
-		if (model->check_ctrs(args->regs, &per_cpu(cpu_msrs, cpu)))
-			ret = NOTIFY_STOP;
+	case DIE_NMI_IPI:
+		model->check_ctrs(args->regs, &per_cpu(cpu_msrs, cpu));
+		ret = NOTIFY_STOP;
 		break;
 	default:
 		break;
@@ -172,26 +72,18 @@ static int profile_exceptions_notify(struct notifier_block *self,
 
 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 i;
 
-	for (i = 0; i < nr_ctrs; ++i) {
-		if (counters[i].addr) {
-			rdmsr(counters[i].addr,
-				counters[i].saved.low,
-				counters[i].saved.high);
-		}
+	for (i = 0; i < model->num_counters; ++i) {
+		if (counters[i].addr)
+			rdmsrl(counters[i].addr, counters[i].saved);
 	}
 
-	for (i = 0; i < nr_ctrls; ++i) {
-		if (controls[i].addr) {
-			rdmsr(controls[i].addr,
-				controls[i].saved.low,
-				controls[i].saved.high);
-		}
+	for (i = 0; i < model->num_controls; ++i) {
+		if (controls[i].addr)
+			rdmsrl(controls[i].addr, controls[i].saved);
 	}
 }
 
@@ -215,10 +107,11 @@ static void free_msrs(void)
 
 static int allocate_msrs(void)
 {
-	int i, success = 1;
+	int success = 1;
 	size_t controls_size = sizeof(struct op_msr) * model->num_controls;
 	size_t counters_size = sizeof(struct op_msr) * model->num_counters;
 
+	int i;
 	for_each_possible_cpu(i) {
 		per_cpu(cpu_msrs, i).counters = kmalloc(counters_size,
 								GFP_KERNEL);
@@ -226,8 +119,8 @@ static int allocate_msrs(void)
 			success = 0;
 			break;
 		}
-		per_cpu(cpu_msrs, i).controls =
-				kmalloc(controls_size, GFP_KERNEL);
+		per_cpu(cpu_msrs, i).controls = kmalloc(controls_size,
+								GFP_KERNEL);
 		if (!per_cpu(cpu_msrs, i).controls) {
 			success = 0;
 			break;
@@ -245,7 +138,7 @@ static void nmi_cpu_setup(void *dummy)
 	int cpu = smp_processor_id();
 	struct op_msrs *msrs = &per_cpu(cpu_msrs, cpu);
 	spin_lock(&oprofilefs_lock);
-	model->setup_ctrs(msrs);
+	model->setup_ctrs(model, msrs);
 	spin_unlock(&oprofilefs_lock);
 	per_cpu(saved_lvtpc, cpu) = apic_read(APIC_LVTPC);
 	apic_write(APIC_LVTPC, APIC_DM_NMI);
@@ -254,7 +147,7 @@ static void nmi_cpu_setup(void *dummy)
 static struct notifier_block profile_exceptions_nb = {
 	.notifier_call = profile_exceptions_notify,
 	.next = NULL,
-	.priority = 0
+	.priority = 2
 };
 
 static int nmi_setup(void)
@@ -271,8 +164,7 @@ static int nmi_setup(void)
 		return err;
 	}
 
-	/*
-	 * We need to serialize save and setup for HT because the subset
+	/* We need to serialize save and setup for HT because the subset
 	 * of msrs are distinct for save and setup operations
 	 */
 
@@ -288,6 +180,7 @@ static int nmi_setup(void)
 				per_cpu(cpu_msrs, 0).controls,
 				sizeof(struct op_msr) * model->num_controls);
 		}
+
 	}
 	on_each_cpu(nmi_save_registers, NULL, 1);
 	on_each_cpu(nmi_cpu_setup, NULL, 1);
@@ -295,62 +188,20 @@ static int nmi_setup(void)
 	return 0;
 }
 
-static void nmi_cpu_save_mpx_registers(struct op_msrs *msrs)
-{
-	unsigned int si = __get_cpu_var(switch_index);
-	unsigned int const nr_ctrs = model->num_hardware_counters;
-	struct op_msr *counters = &msrs->counters[si];
-	unsigned int i;
-
-	for (i = 0; i < nr_ctrs; ++i) {
-		int offset = i + si;
-		if (counters[offset].addr) {
-			rdmsr(counters[offset].addr,
-				counters[offset].multiplex.low,
-				counters[offset].multiplex.high);
-		}
-	}
-}
-
-static void nmi_cpu_restore_mpx_registers(struct op_msrs *msrs)
+static void nmi_restore_registers(struct op_msrs *msrs)
 {
-	unsigned int si = __get_cpu_var(switch_index);
-	unsigned int const nr_ctrs = model->num_hardware_counters;
-	struct op_msr *counters = &msrs->counters[si];
-	unsigned int i;
-
-	for (i = 0; i < nr_ctrs; ++i) {
-		int offset = i + si;
-		if (counters[offset].addr) {
-			wrmsr(counters[offset].addr,
-				counters[offset].multiplex.low,
-				counters[offset].multiplex.high);
-		}
-	}
-}
-
-static void nmi_cpu_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 i;
 
-	for (i = 0; i < nr_ctrls; ++i) {
-		if (controls[i].addr) {
-			wrmsr(controls[i].addr,
-				controls[i].saved.low,
-				controls[i].saved.high);
-		}
+	for (i = 0; i < model->num_controls; ++i) {
+		if (controls[i].addr)
+			wrmsrl(controls[i].addr, controls[i].saved);
 	}
 
-	for (i = 0; i < nr_ctrs; ++i) {
-		if (counters[i].addr) {
-			wrmsr(counters[i].addr,
-				counters[i].saved.low,
-				counters[i].saved.high);
-		}
+	for (i = 0; i < model->num_counters; ++i) {
+		if (counters[i].addr)
+			wrmsrl(counters[i].addr, counters[i].saved);
 	}
 }
 
@@ -369,8 +220,7 @@ static void nmi_cpu_shutdown(void *dummy)
 	apic_write(APIC_LVTERR, v | APIC_LVT_MASKED);
 	apic_write(APIC_LVTPC, per_cpu(saved_lvtpc, cpu));
 	apic_write(APIC_LVTERR, v);
-	nmi_cpu_restore_registers(msrs);
-	__get_cpu_var(switch_index) = 0;
+	nmi_restore_registers(msrs);
 }
 
 static void nmi_shutdown(void)
@@ -435,20 +285,87 @@ static int nmi_create_files(struct super_block *sb, struct dentry *root)
 		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);
-		counter_config[i].save_count_low = 0;
 	}
 
 	return 0;
 }
 
-static int p4force;
-module_param(p4force, int, 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_cpu_stop(NULL);
+	return 0;
+}
+
+static int nmi_resume(struct sys_device *dev)
+{
+	if (nmi_enabled == 1)
+		nmi_cpu_start(NULL);
+	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;
+
+	error = sysdev_class_register(&oprofile_sysclass);
+	if (!error)
+		error = sysdev_register(&device_oprofile);
+	return error;
+}
+
+static void exit_sysfs(void)
+{
+	sysdev_unregister(&device_oprofile);
+	sysdev_class_unregister(&oprofile_sysclass);
+}
+
+#else
+#define init_sysfs() do { } while (0)
+#define exit_sysfs() do { } while (0)
+#endif /* CONFIG_PM */
 
 static int __init p4_init(char **cpu_type)
 {
 	__u8 cpu_model = boot_cpu_data.x86_model;
 
-	if (!p4force && (cpu_model > 6 || cpu_model == 5))
+	if (cpu_model > 6 || cpu_model == 5)
 		return 0;
 
 #ifndef CONFIG_SMP
@@ -474,10 +391,25 @@ 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)
+{
+	if (!strcmp(str, "archperfmon")) {
+		force_arch_perfmon = 1;
+		printk(KERN_INFO "oprofile: forcing architectural perfmon\n");
+	}
+
+	return 0;
+}
+module_param_call(cpu_type, force_cpu_type, NULL, NULL, 0);
+
 static int __init ppro_init(char **cpu_type)
 {
 	__u8 cpu_model = boot_cpu_data.x86_model;
 
+	if (force_arch_perfmon && cpu_has_arch_perfmon)
+		return 0;
+
 	switch (cpu_model) {
 	case 0 ... 2:
 		*cpu_type = "i386/ppro";
@@ -486,14 +418,13 @@ static int __init ppro_init(char **cpu_type)
 		*cpu_type = "i386/pii";
 		break;
 	case 6 ... 8:
+	case 10 ... 11:
 		*cpu_type = "i386/piii";
 		break;
 	case 9:
+	case 13:
 		*cpu_type = "i386/p6_mobile";
 		break;
-	case 10 ... 13:
-		*cpu_type = "i386/p6";
-		break;
 	case 14:
 		*cpu_type = "i386/core";
 		break;
@@ -501,7 +432,11 @@ static int __init ppro_init(char **cpu_type)
 		*cpu_type = "i386/core_2";
 		break;
 	case 26:
-		*cpu_type = "i386/core_2";
+		model = &op_arch_perfmon_spec;
+		*cpu_type = "i386/core_i7";
+		break;
+	case 28:
+		*cpu_type = "i386/atom";
 		break;
 	default:
 		/* Unknown */
@@ -519,7 +454,7 @@ 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;
+	char *cpu_type = NULL;
 	int ret = 0;
 
 	if (!cpu_has_apic)
@@ -530,46 +465,53 @@ int __init op_nmi_init(struct oprofile_operations *ops)
 		/* Needs to be at least an Athlon (or hammer in 32bit mode) */
 
 		switch (family) {
-		default:
-			return -ENODEV;
 		case 6:
-			model = &op_amd_spec;
 			cpu_type = "i386/athlon";
 			break;
 		case 0xf:
-			model = &op_amd_spec;
-			/* Actually it could be i386/hammer too, but give
-			 user space an consistent name. */
+			/*
+			 * Actually it could be i386/hammer too, but
+			 * give user space an consistent name.
+			 */
 			cpu_type = "x86-64/hammer";
 			break;
 		case 0x10:
-			model = &op_amd_spec;
 			cpu_type = "x86-64/family10";
 			break;
 		case 0x11:
-			model = &op_amd_spec;
 			cpu_type = "x86-64/family11h";
 			break;
+		default:
+			return -ENODEV;
 		}
+		model = &op_amd_spec;
 		break;
 
 	case X86_VENDOR_INTEL:
 		switch (family) {
 			/* Pentium IV */
 		case 0xf:
-			if (!p4_init(&cpu_type))
-				return -ENODEV;
+			p4_init(&cpu_type);
 			break;
 
 			/* A P6-class processor */
 		case 6:
-			if (!ppro_init(&cpu_type))
-				return -ENODEV;
+			ppro_init(&cpu_type);
 			break;
 
 		default:
-			return -ENODEV;
+			break;
 		}
+
+		if (cpu_type)
+			break;
+
+		if (!cpu_has_arch_perfmon)
+			return -ENODEV;
+
+		/* use arch perfmon as fallback */
+		cpu_type = "i386/arch_perfmon";
+		model = &op_arch_perfmon_spec;
 		break;
 
 	default:
@@ -580,14 +522,12 @@ int __init op_nmi_init(struct oprofile_operations *ops)
 	register_cpu_notifier(&oprofile_cpu_nb);
 #endif
 	/* default values, can be overwritten by model */
-	__raw_get_cpu_var(switch_index) = 0;
 	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;
-	ops->switch_events = nmi_switch_event;
 
 	if (model->init)
 		ret = model->init(ops);
@@ -607,7 +547,7 @@ void op_nmi_exit(void)
 #ifdef CONFIG_SMP
 		unregister_cpu_notifier(&oprofile_cpu_nb);
 #endif
+	}
 	if (model->exit)
 		model->exit();
-	}
 }