#include <linux/sysdev.h>#include <linux/cpu.h>#include <linux/smp.h>#include <linux/percpu.h>#include <linux/init.h>#include <linux/sched.h>#include <linux/export.h>#include <linux/nodemask.h>#include <linux/cpumask.h>#include <linux/notifier.h> #include <asm/current.h>#include <asm/processor.h>#include <asm/cputable.h>#include <asm/firmware.h>#include <asm/hvcall.h>#include <asm/prom.h>#include <asm/machdep.h>#include <asm/smp.h>#include <asm/pmc.h> #include "cacheinfo.h" #ifdef CONFIG_PPC64#include <asm/paca.h>#include <asm/lppaca.h>#endif static DEFINE_PER_CPU(struct cpu, cpu_devices); /* * SMT snooze delay stuff, 64-bit only for now */ #ifdef CONFIG_PPC64 /* Time in microseconds we delay before sleeping in the idle loop */DEFINE_PER_CPU(long, smt_snooze_delay) = { 100 }; static ssize_t store_smt_snooze_delay(struct sys_device *dev,				      struct sysdev_attribute *attr,				      const char *buf,				      size_t count){	struct cpu *cpu = container_of(dev, struct cpu, sysdev);	ssize_t ret;	long snooze; 	ret = sscanf(buf, "%ld", &snooze);	if (ret != 1)		return -EINVAL; 	per_cpu(smt_snooze_delay, cpu->sysdev.id) = snooze; 	return count;} static ssize_t show_smt_snooze_delay(struct sys_device *dev,				     struct sysdev_attribute *attr,				     char *buf){	struct cpu *cpu = container_of(dev, struct cpu, sysdev); 	return sprintf(buf, "%ld\n", per_cpu(smt_snooze_delay, cpu->sysdev.id));} static SYSDEV_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,		   store_smt_snooze_delay); static int __init setup_smt_snooze_delay(char *str){	unsigned int cpu;	long snooze; 	if (!cpu_has_feature(CPU_FTR_SMT))		return 1; 	snooze = simple_strtol(str, NULL, 10);	for_each_possible_cpu(cpu)		per_cpu(smt_snooze_delay, cpu) = snooze; 	return 1;}__setup("smt-snooze-delay=", setup_smt_snooze_delay); #endif /* CONFIG_PPC64 */ /* * Enabling PMCs will slow partition context switch times so we only do * it the first time we write to the PMCs. */ static DEFINE_PER_CPU(char, pmcs_enabled); void ppc_enable_pmcs(void){	ppc_set_pmu_inuse(1); 	/* Only need to enable them once */	if (__get_cpu_var(pmcs_enabled))		return; 	__get_cpu_var(pmcs_enabled) = 1; 	if (ppc_md.enable_pmcs)		ppc_md.enable_pmcs();}EXPORT_SYMBOL(ppc_enable_pmcs); #define SYSFS_PMCSETUP(NAME, ADDRESS) \static void read_##NAME(void *val) \{ \	*(unsigned long *)val = mfspr(ADDRESS);	\} \static void write_##NAME(void *val) \{ \	ppc_enable_pmcs(); \	mtspr(ADDRESS, *(unsigned long *)val);	\} \static ssize_t show_##NAME(struct sys_device *dev, \			struct sysdev_attribute *attr, \			char *buf) \{ \	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \	unsigned long val; \	smp_call_function_single(cpu->sysdev.id, read_##NAME, &val, 1);	\	return sprintf(buf, "%lx\n", val); \} \static ssize_t __used \	store_##NAME(struct sys_device *dev, struct sysdev_attribute *attr, \			const char *buf, size_t count) \{ \	struct cpu *cpu = container_of(dev, struct cpu, sysdev); \	unsigned long val; \	int ret = sscanf(buf, "%lx", &val); \	if (ret != 1) \		return -EINVAL; \	smp_call_function_single(cpu->sysdev.id, write_##NAME, &val, 1); \	return count; \}  /* Let's define all possible registers, we'll only hook up the ones * that are implemented on the current processor */ #if defined(CONFIG_PPC64)#define HAS_PPC_PMC_CLASSIC	1#define HAS_PPC_PMC_IBM		1#define HAS_PPC_PMC_PA6T	1#elif defined(CONFIG_6xx)#define HAS_PPC_PMC_CLASSIC	1#define HAS_PPC_PMC_IBM		1#define HAS_PPC_PMC_G4		1#endif  #ifdef HAS_PPC_PMC_CLASSICSYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);SYSFS_PMCSETUP(pmc1, SPRN_PMC1);SYSFS_PMCSETUP(pmc2, SPRN_PMC2);SYSFS_PMCSETUP(pmc3, SPRN_PMC3);SYSFS_PMCSETUP(pmc4, SPRN_PMC4);SYSFS_PMCSETUP(pmc5, SPRN_PMC5);SYSFS_PMCSETUP(pmc6, SPRN_PMC6); #ifdef HAS_PPC_PMC_G4SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);#endif #ifdef CONFIG_PPC64SYSFS_PMCSETUP(pmc7, SPRN_PMC7);SYSFS_PMCSETUP(pmc8, SPRN_PMC8); SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);SYSFS_PMCSETUP(purr, SPRN_PURR);SYSFS_PMCSETUP(spurr, SPRN_SPURR);SYSFS_PMCSETUP(dscr, SPRN_DSCR); static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);static SYSDEV_ATTR(purr, 0600, show_purr, store_purr); unsigned long dscr_default = 0;EXPORT_SYMBOL(dscr_default); static ssize_t show_dscr_default(struct sysdev_class *class,		struct sysdev_class_attribute *attr, char *buf){	return sprintf(buf, "%lx\n", dscr_default);} static ssize_t __used store_dscr_default(struct sysdev_class *class,		struct sysdev_class_attribute *attr, const char *buf,		size_t count){	unsigned long val;	int ret = 0;		ret = sscanf(buf, "%lx", &val);	if (ret != 1)		return -EINVAL;	dscr_default = val; 	return count;} static SYSDEV_CLASS_ATTR(dscr_default, 0600,		show_dscr_default, store_dscr_default); static void sysfs_create_dscr_default(void){	int err = 0;	if (cpu_has_feature(CPU_FTR_DSCR))		err = sysfs_create_file(&cpu_sysdev_class.kset.kobj,			&attr_dscr_default.attr);}#endif /* CONFIG_PPC64 */ #ifdef HAS_PPC_PMC_PA6TSYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);#ifdef CONFIG_DEBUG_KERNELSYSFS_PMCSETUP(hid0, SPRN_HID0);SYSFS_PMCSETUP(hid1, SPRN_HID1);SYSFS_PMCSETUP(hid4, SPRN_HID4);SYSFS_PMCSETUP(hid5, SPRN_HID5);SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0);SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1);SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2);SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3);SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4);SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5);SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6);SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7);SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8);SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9);SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT);SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR);SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR);SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR);SYSFS_PMCSETUP(der, SPRN_PA6T_DER);SYSFS_PMCSETUP(mer, SPRN_PA6T_MER);SYSFS_PMCSETUP(ber, SPRN_PA6T_BER);SYSFS_PMCSETUP(ier, SPRN_PA6T_IER);SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER);SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR);SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0);SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1);SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2);SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3);#endif /* CONFIG_DEBUG_KERNEL */#endif /* HAS_PPC_PMC_PA6T */ #ifdef HAS_PPC_PMC_IBMstatic struct sysdev_attribute ibm_common_attrs[] = {	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),};#endif /* HAS_PPC_PMC_G4 */ #ifdef HAS_PPC_PMC_G4static struct sysdev_attribute g4_common_attrs[] = {	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),	_SYSDEV_ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),};#endif /* HAS_PPC_PMC_G4 */ static struct sysdev_attribute classic_pmc_attrs[] = {	_SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1),	_SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2),	_SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3),	_SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4),	_SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5),	_SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6),#ifdef CONFIG_PPC64	_SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7),	_SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8),#endif}; #ifdef HAS_PPC_PMC_PA6Tstatic struct sysdev_attribute pa6t_attrs[] = {	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),	_SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),	_SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),	_SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),	_SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),	_SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),	_SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),#ifdef CONFIG_DEBUG_KERNEL	_SYSDEV_ATTR(hid0, 0600, show_hid0, store_hid0),	_SYSDEV_ATTR(hid1, 0600, show_hid1, store_hid1),	_SYSDEV_ATTR(hid4, 0600, show_hid4, store_hid4),	_SYSDEV_ATTR(hid5, 0600, show_hid5, store_hid5),	_SYSDEV_ATTR(ima0, 0600, show_ima0, store_ima0),	_SYSDEV_ATTR(ima1, 0600, show_ima1, store_ima1),	_SYSDEV_ATTR(ima2, 0600, show_ima2, store_ima2),	_SYSDEV_ATTR(ima3, 0600, show_ima3, store_ima3),	_SYSDEV_ATTR(ima4, 0600, show_ima4, store_ima4),	_SYSDEV_ATTR(ima5, 0600, show_ima5, store_ima5),	_SYSDEV_ATTR(ima6, 0600, show_ima6, store_ima6),	_SYSDEV_ATTR(ima7, 0600, show_ima7, store_ima7),	_SYSDEV_ATTR(ima8, 0600, show_ima8, store_ima8),	_SYSDEV_ATTR(ima9, 0600, show_ima9, store_ima9),	_SYSDEV_ATTR(imaat, 0600, show_imaat, store_imaat),	_SYSDEV_ATTR(btcr, 0600, show_btcr, store_btcr),	_SYSDEV_ATTR(pccr, 0600, show_pccr, store_pccr),	_SYSDEV_ATTR(rpccr, 0600, show_rpccr, store_rpccr),	_SYSDEV_ATTR(der, 0600, show_der, store_der),	_SYSDEV_ATTR(mer, 0600, show_mer, store_mer),	_SYSDEV_ATTR(ber, 0600, show_ber, store_ber),	_SYSDEV_ATTR(ier, 0600, show_ier, store_ier),	_SYSDEV_ATTR(sier, 0600, show_sier, store_sier),	_SYSDEV_ATTR(siar, 0600, show_siar, store_siar),	_SYSDEV_ATTR(tsr0, 0600, show_tsr0, store_tsr0),	_SYSDEV_ATTR(tsr1, 0600, show_tsr1, store_tsr1),	_SYSDEV_ATTR(tsr2, 0600, show_tsr2, store_tsr2),	_SYSDEV_ATTR(tsr3, 0600, show_tsr3, store_tsr3),#endif /* CONFIG_DEBUG_KERNEL */};#endif /* HAS_PPC_PMC_PA6T */#endif /* HAS_PPC_PMC_CLASSIC */ static void __cpuinit register_cpu_online(unsigned int cpu){	struct cpu *c = &per_cpu(cpu_devices, cpu);	struct sys_device *s = &c->sysdev;	struct sysdev_attribute *attrs, *pmc_attrs;	int i, nattrs; #ifdef CONFIG_PPC64	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&			cpu_has_feature(CPU_FTR_SMT))		sysdev_create_file(s, &attr_smt_snooze_delay);#endif 	/* PMC stuff */	switch (cur_cpu_spec->pmc_type) {#ifdef HAS_PPC_PMC_IBM	case PPC_PMC_IBM:		attrs = ibm_common_attrs;		nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);		pmc_attrs = classic_pmc_attrs;		break;#endif /* HAS_PPC_PMC_IBM */#ifdef HAS_PPC_PMC_G4	case PPC_PMC_G4:		attrs = g4_common_attrs;		nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);		pmc_attrs = classic_pmc_attrs;		break;#endif /* HAS_PPC_PMC_G4 */#ifdef HAS_PPC_PMC_PA6T	case PPC_PMC_PA6T:		/* PA Semi starts counting at PMC0 */		attrs = pa6t_attrs;		nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);		pmc_attrs = NULL;		break;#endif /* HAS_PPC_PMC_PA6T */	default:		attrs = NULL;		nattrs = 0;		pmc_attrs = NULL;	} 	for (i = 0; i < nattrs; i++)		sysdev_create_file(s, &attrs[i]); 	if (pmc_attrs)		for (i = 0; i < cur_cpu_spec->num_pmcs; i++)			sysdev_create_file(s, &pmc_attrs[i]); #ifdef CONFIG_PPC64	if (cpu_has_feature(CPU_FTR_MMCRA))		sysdev_create_file(s, &attr_mmcra); 	if (cpu_has_feature(CPU_FTR_PURR))		sysdev_create_file(s, &attr_purr); 	if (cpu_has_feature(CPU_FTR_SPURR))		sysdev_create_file(s, &attr_spurr); 	if (cpu_has_feature(CPU_FTR_DSCR))		sysdev_create_file(s, &attr_dscr);#endif /* CONFIG_PPC64 */ 	cacheinfo_cpu_online(cpu);} #ifdef CONFIG_HOTPLUG_CPUstatic void unregister_cpu_online(unsigned int cpu){	struct cpu *c = &per_cpu(cpu_devices, cpu);	struct sys_device *s = &c->sysdev;	struct sysdev_attribute *attrs, *pmc_attrs;	int i, nattrs; 	BUG_ON(!c->hotpluggable); #ifdef CONFIG_PPC64	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&			cpu_has_feature(CPU_FTR_SMT))		sysdev_remove_file(s, &attr_smt_snooze_delay);#endif 	/* PMC stuff */	switch (cur_cpu_spec->pmc_type) {#ifdef HAS_PPC_PMC_IBM	case PPC_PMC_IBM:		attrs = ibm_common_attrs;		nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);		pmc_attrs = classic_pmc_attrs;		break;#endif /* HAS_PPC_PMC_IBM */#ifdef HAS_PPC_PMC_G4	case PPC_PMC_G4:		attrs = g4_common_attrs;		nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);		pmc_attrs = classic_pmc_attrs;		break;#endif /* HAS_PPC_PMC_G4 */#ifdef HAS_PPC_PMC_PA6T	case PPC_PMC_PA6T:		/* PA Semi starts counting at PMC0 */		attrs = pa6t_attrs;		nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);		pmc_attrs = NULL;		break;#endif /* HAS_PPC_PMC_PA6T */	default:		attrs = NULL;		nattrs = 0;		pmc_attrs = NULL;	} 	for (i = 0; i < nattrs; i++)		sysdev_remove_file(s, &attrs[i]); 	if (pmc_attrs)		for (i = 0; i < cur_cpu_spec->num_pmcs; i++)			sysdev_remove_file(s, &pmc_attrs[i]); #ifdef CONFIG_PPC64	if (cpu_has_feature(CPU_FTR_MMCRA))		sysdev_remove_file(s, &attr_mmcra); 	if (cpu_has_feature(CPU_FTR_PURR))		sysdev_remove_file(s, &attr_purr); 	if (cpu_has_feature(CPU_FTR_SPURR))		sysdev_remove_file(s, &attr_spurr); 	if (cpu_has_feature(CPU_FTR_DSCR))		sysdev_remove_file(s, &attr_dscr);#endif /* CONFIG_PPC64 */ 	cacheinfo_cpu_offline(cpu);} #ifdef CONFIG_ARCH_CPU_PROBE_RELEASEssize_t arch_cpu_probe(const char *buf, size_t count){	if (ppc_md.cpu_probe)		return ppc_md.cpu_probe(buf, count); 	return -EINVAL;} ssize_t arch_cpu_release(const char *buf, size_t count){	if (ppc_md.cpu_release)		return ppc_md.cpu_release(buf, count); 	return -EINVAL;}#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */ #endif /* CONFIG_HOTPLUG_CPU */ static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,				      unsigned long action, void *hcpu){	unsigned int cpu = (unsigned int)(long)hcpu; 	switch (action) {	case CPU_ONLINE:	case CPU_ONLINE_FROZEN:		register_cpu_online(cpu);		break;#ifdef CONFIG_HOTPLUG_CPU

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