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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237/* SPDX-License-Identifier: GPL-2.0 *//* * include/linux/cpu.h - generic cpu definition * * This is mainly for topological representation. We define the * basic 'struct cpu' here, which can be embedded in per-arch * definitions of processors. * * Basic handling of the devices is done in drivers/base/cpu.c * * CPUs are exported via sysfs in the devices/system/cpu * directory. */#ifndef _LINUX_CPU_H_#define _LINUX_CPU_H_
#include <linux/node.h>#include <linux/compiler.h>#include <linux/cpuhotplug.h>#include <linux/cpuhplock.h>#include <linux/cpu_smt.h>
struct device;struct device_node;struct attribute_group;
struct cpu { int node_id; /* The node which contains the CPU */ int hotpluggable; /* creates sysfs control file if hotpluggable */ struct device dev;};
extern void boot_cpu_init(void);extern void boot_cpu_hotplug_init(void);extern void cpu_init(void);extern void trap_init(void);
extern int register_cpu(struct cpu *cpu, int num);extern struct device *get_cpu_device(unsigned cpu);extern bool cpu_is_hotpluggable(unsigned cpu);extern bool arch_match_cpu_phys_id(int cpu, u64 phys_id);extern bool arch_find_n_match_cpu_physical_id(struct device_node *cpun, int cpu, unsigned int *thread);
extern int cpu_add_dev_attr(struct device_attribute *attr);extern void cpu_remove_dev_attr(struct device_attribute *attr);
extern int cpu_add_dev_attr_group(struct attribute_group *attrs);extern void cpu_remove_dev_attr_group(struct attribute_group *attrs);
extern ssize_t cpu_show_meltdown(struct device *dev, struct device_attribute *attr, char *buf);extern ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr, char *buf);extern ssize_t cpu_show_spectre_v2(struct device *dev, struct device_attribute *attr, char *buf);extern ssize_t cpu_show_spec_store_bypass(struct device *dev, struct device_attribute *attr, char *buf);extern ssize_t cpu_show_l1tf(struct device *dev, struct device_attribute *attr, char *buf);extern ssize_t cpu_show_mds(struct device *dev, struct device_attribute *attr, char *buf);extern ssize_t cpu_show_tsx_async_abort(struct device *dev, struct device_attribute *attr, char *buf);extern ssize_t cpu_show_itlb_multihit(struct device *dev, struct device_attribute *attr, char *buf);extern ssize_t cpu_show_srbds(struct device *dev, struct device_attribute *attr, char *buf);extern ssize_t cpu_show_mmio_stale_data(struct device *dev, struct device_attribute *attr, char *buf);extern ssize_t cpu_show_retbleed(struct device *dev, struct device_attribute *attr, char *buf);extern ssize_t cpu_show_spec_rstack_overflow(struct device *dev, struct device_attribute *attr, char *buf);extern ssize_t cpu_show_gds(struct device *dev, struct device_attribute *attr, char *buf);extern ssize_t cpu_show_reg_file_data_sampling(struct device *dev, struct device_attribute *attr, char *buf);extern ssize_t cpu_show_ghostwrite(struct device *dev, struct device_attribute *attr, char *buf);extern ssize_t cpu_show_old_microcode(struct device *dev, struct device_attribute *attr, char *buf);extern ssize_t cpu_show_indirect_target_selection(struct device *dev, struct device_attribute *attr, char *buf);extern ssize_t cpu_show_tsa(struct device *dev, struct device_attribute *attr, char *buf);extern ssize_t cpu_show_vmscape(struct device *dev, struct device_attribute *attr, char *buf);
extern __printf(4, 5)struct device *cpu_device_create(struct device *parent, void *drvdata, const struct attribute_group **groups, const char *fmt, ...);extern bool arch_cpu_is_hotpluggable(int cpu);extern int arch_register_cpu(int cpu);extern void arch_unregister_cpu(int cpu);#ifdef CONFIG_HOTPLUG_CPUextern void unregister_cpu(struct cpu *cpu);extern ssize_t arch_cpu_probe(const char *, size_t);extern ssize_t arch_cpu_release(const char *, size_t);#endif
#ifdef CONFIG_GENERIC_CPU_DEVICESDECLARE_PER_CPU(struct cpu, cpu_devices);#endif
/* * These states are not related to the core CPU hotplug mechanism. They are * used by various (sub)architectures to track internal state */#define CPU_ONLINE 0x0002 /* CPU is up */#define CPU_UP_PREPARE 0x0003 /* CPU coming up */#define CPU_DEAD 0x0007 /* CPU dead */#define CPU_DEAD_FROZEN 0x0008 /* CPU timed out on unplug */#define CPU_POST_DEAD 0x0009 /* CPU successfully unplugged */#define CPU_BROKEN 0x000B /* CPU did not die properly */
#ifdef CONFIG_SMPextern bool cpuhp_tasks_frozen;int add_cpu(unsigned int cpu);int cpu_device_up(struct device *dev);void notify_cpu_starting(unsigned int cpu);extern void cpu_maps_update_begin(void);extern void cpu_maps_update_done(void);int bringup_hibernate_cpu(unsigned int sleep_cpu);void bringup_nonboot_cpus(unsigned int max_cpus);int arch_cpu_rescan_dead_smt_siblings(void);
#else /* CONFIG_SMP */#define cpuhp_tasks_frozen 0
static inline void cpu_maps_update_begin(void){}
static inline void cpu_maps_update_done(void){}
static inline int add_cpu(unsigned int cpu) { return 0;}
static inline int arch_cpu_rescan_dead_smt_siblings(void) { return 0; }
#endif /* CONFIG_SMP */extern const struct bus_type cpu_subsys;
#ifdef CONFIG_PM_SLEEP_SMPextern int freeze_secondary_cpus(int primary);extern void thaw_secondary_cpus(void);
static inline int suspend_disable_secondary_cpus(void){ int cpu = 0;
if (IS_ENABLED(CONFIG_PM_SLEEP_SMP_NONZERO_CPU)) cpu = -1;
return freeze_secondary_cpus(cpu);}static inline void suspend_enable_secondary_cpus(void){ thaw_secondary_cpus();}
#else /* !CONFIG_PM_SLEEP_SMP */static inline void thaw_secondary_cpus(void) {}static inline int suspend_disable_secondary_cpus(void) { return 0; }static inline void suspend_enable_secondary_cpus(void) { }#endif /* !CONFIG_PM_SLEEP_SMP */
void __noreturn cpu_startup_entry(enum cpuhp_state state);
void cpu_idle_poll_ctrl(bool enable);
bool cpu_in_idle(unsigned long pc);
void arch_cpu_idle(void);void arch_cpu_idle_prepare(void);void arch_cpu_idle_enter(void);void arch_cpu_idle_exit(void);void arch_tick_broadcast_enter(void);void arch_tick_broadcast_exit(void);void __noreturn arch_cpu_idle_dead(void);
#ifdef CONFIG_ARCH_HAS_CPU_FINALIZE_INITvoid arch_cpu_finalize_init(void);#elsestatic inline void arch_cpu_finalize_init(void) { }#endif
void play_idle_precise(u64 duration_ns, u64 latency_ns);
#ifdef CONFIG_HOTPLUG_CPUvoid cpuhp_report_idle_dead(void);#elsestatic inline void cpuhp_report_idle_dead(void) { }#endif /* #ifdef CONFIG_HOTPLUG_CPU */
enum cpu_attack_vectors { CPU_MITIGATE_USER_KERNEL, CPU_MITIGATE_USER_USER, CPU_MITIGATE_GUEST_HOST, CPU_MITIGATE_GUEST_GUEST, NR_CPU_ATTACK_VECTORS,};
enum smt_mitigations { SMT_MITIGATIONS_OFF, SMT_MITIGATIONS_AUTO, SMT_MITIGATIONS_ON,};
#ifdef CONFIG_CPU_MITIGATIONSextern bool cpu_mitigations_off(void);extern bool cpu_mitigations_auto_nosmt(void);extern bool cpu_attack_vector_mitigated(enum cpu_attack_vectors v);extern enum smt_mitigations smt_mitigations;#elsestatic inline bool cpu_mitigations_off(void){ return true;}static inline bool cpu_mitigations_auto_nosmt(void){ return false;}static inline bool cpu_attack_vector_mitigated(enum cpu_attack_vectors v){ return false;}#define smt_mitigations SMT_MITIGATIONS_OFF#endif
int arch_prctl_get_branch_landing_pad_state(struct task_struct *t, unsigned long __user *state);int arch_prctl_set_branch_landing_pad_state(struct task_struct *t, unsigned long state);int arch_prctl_lock_branch_landing_pad_state(struct task_struct *t);
#endif /* _LINUX_CPU_H_ */