smp.h (5319B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_X86_SMP_H 3#define _ASM_X86_SMP_H 4#ifndef __ASSEMBLY__ 5#include <linux/cpumask.h> 6#include <asm/percpu.h> 7 8#include <asm/thread_info.h> 9#include <asm/cpumask.h> 10 11extern int smp_num_siblings; 12extern unsigned int num_processors; 13 14DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map); 15DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map); 16DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map); 17/* cpus sharing the last level cache: */ 18DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map); 19DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_l2c_shared_map); 20DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id); 21DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_l2c_id); 22DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number); 23 24static inline struct cpumask *cpu_llc_shared_mask(int cpu) 25{ 26 return per_cpu(cpu_llc_shared_map, cpu); 27} 28 29static inline struct cpumask *cpu_l2c_shared_mask(int cpu) 30{ 31 return per_cpu(cpu_l2c_shared_map, cpu); 32} 33 34DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid); 35DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid); 36DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid); 37#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32) 38DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid); 39#endif 40 41struct task_struct; 42 43struct smp_ops { 44 void (*smp_prepare_boot_cpu)(void); 45 void (*smp_prepare_cpus)(unsigned max_cpus); 46 void (*smp_cpus_done)(unsigned max_cpus); 47 48 void (*stop_other_cpus)(int wait); 49 void (*crash_stop_other_cpus)(void); 50 void (*smp_send_reschedule)(int cpu); 51 52 int (*cpu_up)(unsigned cpu, struct task_struct *tidle); 53 int (*cpu_disable)(void); 54 void (*cpu_die)(unsigned int cpu); 55 void (*play_dead)(void); 56 57 void (*send_call_func_ipi)(const struct cpumask *mask); 58 void (*send_call_func_single_ipi)(int cpu); 59}; 60 61/* Globals due to paravirt */ 62extern void set_cpu_sibling_map(int cpu); 63 64#ifdef CONFIG_SMP 65extern struct smp_ops smp_ops; 66 67static inline void smp_send_stop(void) 68{ 69 smp_ops.stop_other_cpus(0); 70} 71 72static inline void stop_other_cpus(void) 73{ 74 smp_ops.stop_other_cpus(1); 75} 76 77static inline void smp_prepare_boot_cpu(void) 78{ 79 smp_ops.smp_prepare_boot_cpu(); 80} 81 82static inline void smp_prepare_cpus(unsigned int max_cpus) 83{ 84 smp_ops.smp_prepare_cpus(max_cpus); 85} 86 87static inline void smp_cpus_done(unsigned int max_cpus) 88{ 89 smp_ops.smp_cpus_done(max_cpus); 90} 91 92static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle) 93{ 94 return smp_ops.cpu_up(cpu, tidle); 95} 96 97static inline int __cpu_disable(void) 98{ 99 return smp_ops.cpu_disable(); 100} 101 102static inline void __cpu_die(unsigned int cpu) 103{ 104 smp_ops.cpu_die(cpu); 105} 106 107static inline void play_dead(void) 108{ 109 smp_ops.play_dead(); 110} 111 112static inline void smp_send_reschedule(int cpu) 113{ 114 smp_ops.smp_send_reschedule(cpu); 115} 116 117static inline void arch_send_call_function_single_ipi(int cpu) 118{ 119 smp_ops.send_call_func_single_ipi(cpu); 120} 121 122static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 123{ 124 smp_ops.send_call_func_ipi(mask); 125} 126 127void cpu_disable_common(void); 128void native_smp_prepare_boot_cpu(void); 129void smp_prepare_cpus_common(void); 130void native_smp_prepare_cpus(unsigned int max_cpus); 131void calculate_max_logical_packages(void); 132void native_smp_cpus_done(unsigned int max_cpus); 133int common_cpu_up(unsigned int cpunum, struct task_struct *tidle); 134int native_cpu_up(unsigned int cpunum, struct task_struct *tidle); 135int native_cpu_disable(void); 136int common_cpu_die(unsigned int cpu); 137void native_cpu_die(unsigned int cpu); 138void hlt_play_dead(void); 139void native_play_dead(void); 140void play_dead_common(void); 141void wbinvd_on_cpu(int cpu); 142int wbinvd_on_all_cpus(void); 143void cond_wakeup_cpu0(void); 144 145void native_smp_send_reschedule(int cpu); 146void native_send_call_func_ipi(const struct cpumask *mask); 147void native_send_call_func_single_ipi(int cpu); 148void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle); 149 150void smp_store_boot_cpu_info(void); 151void smp_store_cpu_info(int id); 152 153asmlinkage __visible void smp_reboot_interrupt(void); 154__visible void smp_reschedule_interrupt(struct pt_regs *regs); 155__visible void smp_call_function_interrupt(struct pt_regs *regs); 156__visible void smp_call_function_single_interrupt(struct pt_regs *r); 157 158#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 159#define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu) 160 161/* 162 * This function is needed by all SMP systems. It must _always_ be valid 163 * from the initial startup. We map APIC_BASE very early in page_setup(), 164 * so this is correct in the x86 case. 165 */ 166#define raw_smp_processor_id() this_cpu_read(cpu_number) 167#define __smp_processor_id() __this_cpu_read(cpu_number) 168 169#ifdef CONFIG_X86_32 170extern int safe_smp_processor_id(void); 171#else 172# define safe_smp_processor_id() smp_processor_id() 173#endif 174 175#else /* !CONFIG_SMP */ 176#define wbinvd_on_cpu(cpu) wbinvd() 177static inline int wbinvd_on_all_cpus(void) 178{ 179 wbinvd(); 180 return 0; 181} 182#endif /* CONFIG_SMP */ 183 184extern unsigned disabled_cpus; 185 186#ifdef CONFIG_X86_LOCAL_APIC 187extern int hard_smp_processor_id(void); 188 189#else /* CONFIG_X86_LOCAL_APIC */ 190#define hard_smp_processor_id() 0 191#endif /* CONFIG_X86_LOCAL_APIC */ 192 193#ifdef CONFIG_DEBUG_NMI_SELFTEST 194extern void nmi_selftest(void); 195#else 196#define nmi_selftest() do { } while (0) 197#endif 198 199#endif /* __ASSEMBLY__ */ 200#endif /* _ASM_X86_SMP_H */