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