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