1 #ifndef _ASM_X86_SMP_H 2 #define _ASM_X86_SMP_H 3 #ifndef __ASSEMBLY__ 4 #include <linux/cpumask.h> 5 #include <linux/init.h> 6 #include <asm/percpu.h> 7 8 /* 9 * We need the APIC definitions automatically as part of 'smp.h' 10 */ 11 #ifdef CONFIG_X86_LOCAL_APIC 12 # include <asm/mpspec.h> 13 # include <asm/apic.h> 14 # ifdef CONFIG_X86_IO_APIC 15 # include <asm/io_apic.h> 16 # endif 17 #endif 18 #include <asm/thread_info.h> 19 #include <asm/cpumask.h> 20 #include <asm/cpufeature.h> 21 22 extern int smp_num_siblings; 23 extern unsigned int num_processors; 24 25 static inline bool cpu_has_ht_siblings(void) 26 { 27 bool has_siblings = false; 28 #ifdef CONFIG_SMP 29 has_siblings = cpu_has_ht && smp_num_siblings > 1; 30 #endif 31 return has_siblings; 32 } 33 34 DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map); 35 DECLARE_PER_CPU(cpumask_var_t, cpu_core_map); 36 /* cpus sharing the last level cache: */ 37 DECLARE_PER_CPU(cpumask_var_t, cpu_llc_shared_map); 38 DECLARE_PER_CPU(u16, cpu_llc_id); 39 DECLARE_PER_CPU(int, cpu_number); 40 41 static inline struct cpumask *cpu_sibling_mask(int cpu) 42 { 43 return per_cpu(cpu_sibling_map, cpu); 44 } 45 46 static inline struct cpumask *cpu_core_mask(int cpu) 47 { 48 return per_cpu(cpu_core_map, cpu); 49 } 50 51 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 52 { 53 return per_cpu(cpu_llc_shared_map, cpu); 54 } 55 56 DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid); 57 DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid); 58 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32) 59 DECLARE_EARLY_PER_CPU(int, x86_cpu_to_logical_apicid); 60 #endif 61 62 /* Static state in head.S used to set up a CPU */ 63 extern unsigned long stack_start; /* Initial stack pointer address */ 64 65 struct smp_ops { 66 void (*smp_prepare_boot_cpu)(void); 67 void (*smp_prepare_cpus)(unsigned max_cpus); 68 void (*smp_cpus_done)(unsigned max_cpus); 69 70 void (*stop_other_cpus)(int wait); 71 void (*smp_send_reschedule)(int cpu); 72 73 int (*cpu_up)(unsigned cpu); 74 int (*cpu_disable)(void); 75 void (*cpu_die)(unsigned int cpu); 76 void (*play_dead)(void); 77 78 void (*send_call_func_ipi)(const struct cpumask *mask); 79 void (*send_call_func_single_ipi)(int cpu); 80 }; 81 82 /* Globals due to paravirt */ 83 extern void set_cpu_sibling_map(int cpu); 84 85 #ifdef CONFIG_SMP 86 #ifndef CONFIG_PARAVIRT 87 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0) 88 #endif 89 extern struct smp_ops smp_ops; 90 91 static inline void smp_send_stop(void) 92 { 93 smp_ops.stop_other_cpus(0); 94 } 95 96 static inline void stop_other_cpus(void) 97 { 98 smp_ops.stop_other_cpus(1); 99 } 100 101 static inline void smp_prepare_boot_cpu(void) 102 { 103 smp_ops.smp_prepare_boot_cpu(); 104 } 105 106 static inline void smp_prepare_cpus(unsigned int max_cpus) 107 { 108 smp_ops.smp_prepare_cpus(max_cpus); 109 } 110 111 static inline void smp_cpus_done(unsigned int max_cpus) 112 { 113 smp_ops.smp_cpus_done(max_cpus); 114 } 115 116 static inline int __cpu_up(unsigned int cpu) 117 { 118 return smp_ops.cpu_up(cpu); 119 } 120 121 static inline int __cpu_disable(void) 122 { 123 return smp_ops.cpu_disable(); 124 } 125 126 static inline void __cpu_die(unsigned int cpu) 127 { 128 smp_ops.cpu_die(cpu); 129 } 130 131 static inline void play_dead(void) 132 { 133 smp_ops.play_dead(); 134 } 135 136 static inline void smp_send_reschedule(int cpu) 137 { 138 smp_ops.smp_send_reschedule(cpu); 139 } 140 141 static inline void arch_send_call_function_single_ipi(int cpu) 142 { 143 smp_ops.send_call_func_single_ipi(cpu); 144 } 145 146 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 147 { 148 smp_ops.send_call_func_ipi(mask); 149 } 150 151 void cpu_disable_common(void); 152 void native_smp_prepare_boot_cpu(void); 153 void native_smp_prepare_cpus(unsigned int max_cpus); 154 void native_smp_cpus_done(unsigned int max_cpus); 155 int native_cpu_up(unsigned int cpunum); 156 int native_cpu_disable(void); 157 void native_cpu_die(unsigned int cpu); 158 void native_play_dead(void); 159 void play_dead_common(void); 160 void wbinvd_on_cpu(int cpu); 161 int wbinvd_on_all_cpus(void); 162 163 void native_send_call_func_ipi(const struct cpumask *mask); 164 void native_send_call_func_single_ipi(int cpu); 165 166 void smp_store_cpu_info(int id); 167 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 168 169 /* We don't mark CPUs online until __cpu_up(), so we need another measure */ 170 static inline int num_booting_cpus(void) 171 { 172 return cpumask_weight(cpu_callout_mask); 173 } 174 #else /* !CONFIG_SMP */ 175 #define wbinvd_on_cpu(cpu) wbinvd() 176 static inline int wbinvd_on_all_cpus(void) 177 { 178 wbinvd(); 179 return 0; 180 } 181 #endif /* CONFIG_SMP */ 182 183 extern unsigned disabled_cpus __cpuinitdata; 184 185 #ifdef CONFIG_X86_32_SMP 186 /* 187 * This function is needed by all SMP systems. It must _always_ be valid 188 * from the initial startup. We map APIC_BASE very early in page_setup(), 189 * so this is correct in the x86 case. 190 */ 191 #define raw_smp_processor_id() (percpu_read(cpu_number)) 192 extern int safe_smp_processor_id(void); 193 194 #elif defined(CONFIG_X86_64_SMP) 195 #define raw_smp_processor_id() (percpu_read(cpu_number)) 196 197 #define stack_smp_processor_id() \ 198 ({ \ 199 struct thread_info *ti; \ 200 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \ 201 ti->cpu; \ 202 }) 203 #define safe_smp_processor_id() smp_processor_id() 204 205 #endif 206 207 #ifdef CONFIG_X86_LOCAL_APIC 208 209 #ifndef CONFIG_X86_64 210 static inline int logical_smp_processor_id(void) 211 { 212 /* we don't want to mark this access volatile - bad code generation */ 213 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR)); 214 } 215 216 #endif 217 218 extern int hard_smp_processor_id(void); 219 220 #else /* CONFIG_X86_LOCAL_APIC */ 221 222 # ifndef CONFIG_SMP 223 # define hard_smp_processor_id() 0 224 # endif 225 226 #endif /* CONFIG_X86_LOCAL_APIC */ 227 228 #endif /* __ASSEMBLY__ */ 229 #endif /* _ASM_X86_SMP_H */ 230