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 7 #include <asm/cpumask.h> 8 #include <asm/current.h> 9 #include <asm/thread_info.h> 10 11 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map); 12 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map); 13 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map); 14 /* cpus sharing the last level cache: */ 15 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map); 16 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_l2c_shared_map); 17 18 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_apicid); 19 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid); 20 21 struct task_struct; 22 23 struct smp_ops { 24 void (*smp_prepare_boot_cpu)(void); 25 void (*smp_prepare_cpus)(unsigned max_cpus); 26 void (*smp_cpus_done)(unsigned max_cpus); 27 28 void (*stop_other_cpus)(int wait); 29 void (*crash_stop_other_cpus)(void); 30 void (*smp_send_reschedule)(int cpu); 31 32 void (*cleanup_dead_cpu)(unsigned cpu); 33 void (*poll_sync_state)(void); 34 int (*kick_ap_alive)(unsigned cpu, struct task_struct *tidle); 35 int (*cpu_disable)(void); 36 void (*cpu_die)(unsigned int cpu); 37 void (*play_dead)(void); 38 39 void (*send_call_func_ipi)(const struct cpumask *mask); 40 void (*send_call_func_single_ipi)(int cpu); 41 }; 42 43 /* Globals due to paravirt */ 44 extern void set_cpu_sibling_map(int cpu); 45 46 #ifdef CONFIG_SMP 47 extern struct smp_ops smp_ops; 48 49 static inline void smp_send_stop(void) 50 { 51 smp_ops.stop_other_cpus(0); 52 } 53 54 static inline void stop_other_cpus(void) 55 { 56 smp_ops.stop_other_cpus(1); 57 } 58 59 static inline void smp_prepare_boot_cpu(void) 60 { 61 smp_ops.smp_prepare_boot_cpu(); 62 } 63 64 static inline void smp_prepare_cpus(unsigned int max_cpus) 65 { 66 smp_ops.smp_prepare_cpus(max_cpus); 67 } 68 69 static inline void smp_cpus_done(unsigned int max_cpus) 70 { 71 smp_ops.smp_cpus_done(max_cpus); 72 } 73 74 static inline int __cpu_disable(void) 75 { 76 return smp_ops.cpu_disable(); 77 } 78 79 static inline void __cpu_die(unsigned int cpu) 80 { 81 if (smp_ops.cpu_die) 82 smp_ops.cpu_die(cpu); 83 } 84 85 static inline void __noreturn play_dead(void) 86 { 87 smp_ops.play_dead(); 88 BUG(); 89 } 90 91 static inline void arch_smp_send_reschedule(int cpu) 92 { 93 smp_ops.smp_send_reschedule(cpu); 94 } 95 96 static inline void arch_send_call_function_single_ipi(int cpu) 97 { 98 smp_ops.send_call_func_single_ipi(cpu); 99 } 100 101 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 102 { 103 smp_ops.send_call_func_ipi(mask); 104 } 105 106 void cpu_disable_common(void); 107 void native_smp_prepare_boot_cpu(void); 108 void smp_prepare_cpus_common(void); 109 void native_smp_prepare_cpus(unsigned int max_cpus); 110 void native_smp_cpus_done(unsigned int max_cpus); 111 int common_cpu_up(unsigned int cpunum, struct task_struct *tidle); 112 int native_kick_ap(unsigned int cpu, struct task_struct *tidle); 113 int native_cpu_disable(void); 114 void __noreturn hlt_play_dead(void); 115 void native_play_dead(void); 116 void play_dead_common(void); 117 void wbinvd_on_cpu(int cpu); 118 int wbinvd_on_all_cpus(void); 119 120 void smp_kick_mwait_play_dead(void); 121 122 void native_smp_send_reschedule(int cpu); 123 void native_send_call_func_ipi(const struct cpumask *mask); 124 void native_send_call_func_single_ipi(int cpu); 125 126 void smp_store_cpu_info(int id); 127 128 asmlinkage __visible void smp_reboot_interrupt(void); 129 __visible void smp_reschedule_interrupt(struct pt_regs *regs); 130 __visible void smp_call_function_interrupt(struct pt_regs *regs); 131 __visible void smp_call_function_single_interrupt(struct pt_regs *r); 132 133 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 134 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu) 135 136 /* 137 * This function is needed by all SMP systems. It must _always_ be valid 138 * from the initial startup. 139 */ 140 #define raw_smp_processor_id() this_cpu_read(pcpu_hot.cpu_number) 141 #define __smp_processor_id() __this_cpu_read(pcpu_hot.cpu_number) 142 143 #ifdef CONFIG_X86_32 144 extern int safe_smp_processor_id(void); 145 #else 146 # define safe_smp_processor_id() smp_processor_id() 147 #endif 148 149 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 150 { 151 return per_cpu(cpu_llc_shared_map, cpu); 152 } 153 154 static inline struct cpumask *cpu_l2c_shared_mask(int cpu) 155 { 156 return per_cpu(cpu_l2c_shared_map, cpu); 157 } 158 159 #else /* !CONFIG_SMP */ 160 #define wbinvd_on_cpu(cpu) wbinvd() 161 static inline int wbinvd_on_all_cpus(void) 162 { 163 wbinvd(); 164 return 0; 165 } 166 167 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 168 { 169 return (struct cpumask *)cpumask_of(0); 170 } 171 #endif /* CONFIG_SMP */ 172 173 #ifdef CONFIG_DEBUG_NMI_SELFTEST 174 extern void nmi_selftest(void); 175 #else 176 #define nmi_selftest() do { } while (0) 177 #endif 178 179 extern unsigned int smpboot_control; 180 extern unsigned long apic_mmio_base; 181 182 #endif /* !__ASSEMBLY__ */ 183 184 /* Control bits for startup_64 */ 185 #define STARTUP_READ_APICID 0x80000000 186 187 /* Top 8 bits are reserved for control */ 188 #define STARTUP_PARALLEL_MASK 0xFF000000 189 190 #endif /* _ASM_X86_SMP_H */ 191