1 #ifndef _ASM_X86_SMP_H 2 #define _ASM_X86_SMP_H 3 #ifndef __ASSEMBLY__ 4 #include <linux/cpumask.h> 5 #include <asm/percpu.h> 6 7 /* 8 * We need the APIC definitions automatically as part of 'smp.h' 9 */ 10 #ifdef CONFIG_X86_LOCAL_APIC 11 # include <asm/mpspec.h> 12 # include <asm/apic.h> 13 # ifdef CONFIG_X86_IO_APIC 14 # include <asm/io_apic.h> 15 # endif 16 #endif 17 #include <asm/thread_info.h> 18 #include <asm/cpumask.h> 19 #include <asm/cpufeature.h> 20 21 extern int smp_num_siblings; 22 extern unsigned int num_processors; 23 24 static inline bool cpu_has_ht_siblings(void) 25 { 26 bool has_siblings = false; 27 #ifdef CONFIG_SMP 28 has_siblings = cpu_has_ht && smp_num_siblings > 1; 29 #endif 30 return has_siblings; 31 } 32 33 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map); 34 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map); 35 /* cpus sharing the last level cache: */ 36 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map); 37 DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id); 38 DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number); 39 40 static inline struct cpumask *cpu_sibling_mask(int cpu) 41 { 42 return per_cpu(cpu_sibling_map, cpu); 43 } 44 45 static inline struct cpumask *cpu_core_mask(int cpu) 46 { 47 return per_cpu(cpu_core_map, cpu); 48 } 49 50 static inline struct cpumask *cpu_llc_shared_mask(int cpu) 51 { 52 return per_cpu(cpu_llc_shared_map, cpu); 53 } 54 55 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid); 56 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid); 57 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32) 58 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid); 59 #endif 60 61 /* Static state in head.S used to set up a CPU */ 62 extern unsigned long stack_start; /* Initial stack pointer address */ 63 64 struct task_struct; 65 66 struct smp_ops { 67 void (*smp_prepare_boot_cpu)(void); 68 void (*smp_prepare_cpus)(unsigned max_cpus); 69 void (*smp_cpus_done)(unsigned max_cpus); 70 71 void (*stop_other_cpus)(int wait); 72 void (*smp_send_reschedule)(int cpu); 73 74 int (*cpu_up)(unsigned cpu, struct task_struct *tidle); 75 int (*cpu_disable)(void); 76 void (*cpu_die)(unsigned int cpu); 77 void (*play_dead)(void); 78 79 void (*send_call_func_ipi)(const struct cpumask *mask); 80 void (*send_call_func_single_ipi)(int cpu); 81 }; 82 83 /* Globals due to paravirt */ 84 extern void set_cpu_sibling_map(int cpu); 85 86 #ifdef CONFIG_SMP 87 #ifndef CONFIG_PARAVIRT 88 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0) 89 #endif 90 extern struct smp_ops smp_ops; 91 92 static inline void smp_send_stop(void) 93 { 94 smp_ops.stop_other_cpus(0); 95 } 96 97 static inline void stop_other_cpus(void) 98 { 99 smp_ops.stop_other_cpus(1); 100 } 101 102 static inline void smp_prepare_boot_cpu(void) 103 { 104 smp_ops.smp_prepare_boot_cpu(); 105 } 106 107 static inline void smp_prepare_cpus(unsigned int max_cpus) 108 { 109 smp_ops.smp_prepare_cpus(max_cpus); 110 } 111 112 static inline void smp_cpus_done(unsigned int max_cpus) 113 { 114 smp_ops.smp_cpus_done(max_cpus); 115 } 116 117 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle) 118 { 119 return smp_ops.cpu_up(cpu, tidle); 120 } 121 122 static inline int __cpu_disable(void) 123 { 124 return smp_ops.cpu_disable(); 125 } 126 127 static inline void __cpu_die(unsigned int cpu) 128 { 129 smp_ops.cpu_die(cpu); 130 } 131 132 static inline void play_dead(void) 133 { 134 smp_ops.play_dead(); 135 } 136 137 static inline void smp_send_reschedule(int cpu) 138 { 139 smp_ops.smp_send_reschedule(cpu); 140 } 141 142 static inline void arch_send_call_function_single_ipi(int cpu) 143 { 144 smp_ops.send_call_func_single_ipi(cpu); 145 } 146 147 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 148 { 149 smp_ops.send_call_func_ipi(mask); 150 } 151 152 void cpu_disable_common(void); 153 void cpu_die_common(unsigned int cpu); 154 void native_smp_prepare_boot_cpu(void); 155 void native_smp_prepare_cpus(unsigned int max_cpus); 156 void native_smp_cpus_done(unsigned int max_cpus); 157 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle); 158 int native_cpu_disable(void); 159 void native_cpu_die(unsigned int cpu); 160 void native_play_dead(void); 161 void play_dead_common(void); 162 void wbinvd_on_cpu(int cpu); 163 int wbinvd_on_all_cpus(void); 164 165 void native_send_call_func_ipi(const struct cpumask *mask); 166 void native_send_call_func_single_ipi(int cpu); 167 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle); 168 169 void smp_store_boot_cpu_info(void); 170 void smp_store_cpu_info(int id); 171 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 172 173 #else /* !CONFIG_SMP */ 174 #define wbinvd_on_cpu(cpu) wbinvd() 175 static inline int wbinvd_on_all_cpus(void) 176 { 177 wbinvd(); 178 return 0; 179 } 180 #endif /* CONFIG_SMP */ 181 182 extern unsigned disabled_cpus; 183 184 #ifdef CONFIG_X86_32_SMP 185 /* 186 * This function is needed by all SMP systems. It must _always_ be valid 187 * from the initial startup. We map APIC_BASE very early in page_setup(), 188 * so this is correct in the x86 case. 189 */ 190 #define raw_smp_processor_id() (this_cpu_read(cpu_number)) 191 extern int safe_smp_processor_id(void); 192 193 #elif defined(CONFIG_X86_64_SMP) 194 #define raw_smp_processor_id() (this_cpu_read(cpu_number)) 195 196 #define stack_smp_processor_id() \ 197 ({ \ 198 struct thread_info *ti; \ 199 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \ 200 ti->cpu; \ 201 }) 202 #define safe_smp_processor_id() smp_processor_id() 203 204 #endif 205 206 #ifdef CONFIG_X86_LOCAL_APIC 207 208 #ifndef CONFIG_X86_64 209 static inline int logical_smp_processor_id(void) 210 { 211 /* we don't want to mark this access volatile - bad code generation */ 212 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR)); 213 } 214 215 #endif 216 217 extern int hard_smp_processor_id(void); 218 219 #else /* CONFIG_X86_LOCAL_APIC */ 220 221 # ifndef CONFIG_SMP 222 # define hard_smp_processor_id() 0 223 # endif 224 225 #endif /* CONFIG_X86_LOCAL_APIC */ 226 227 #ifdef CONFIG_DEBUG_NMI_SELFTEST 228 extern void nmi_selftest(void); 229 #else 230 #define nmi_selftest() do { } while (0) 231 #endif 232 233 #endif /* __ASSEMBLY__ */ 234 #endif /* _ASM_X86_SMP_H */ 235