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_READ_MOSTLY(cpumask_var_t, cpu_sibling_map); 35 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map); 36 /* cpus sharing the last level cache: */ 37 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map); 38 DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id); 39 DECLARE_PER_CPU_READ_MOSTLY(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_READ_MOSTLY(u16, x86_cpu_to_apicid); 57 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid); 58 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32) 59 DECLARE_EARLY_PER_CPU_READ_MOSTLY(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 task_struct; 66 67 struct smp_ops { 68 void (*smp_prepare_boot_cpu)(void); 69 void (*smp_prepare_cpus)(unsigned max_cpus); 70 void (*smp_cpus_done)(unsigned max_cpus); 71 72 void (*stop_other_cpus)(int wait); 73 void (*smp_send_reschedule)(int cpu); 74 75 int (*cpu_up)(unsigned cpu, struct task_struct *tidle); 76 int (*cpu_disable)(void); 77 void (*cpu_die)(unsigned int cpu); 78 void (*play_dead)(void); 79 80 void (*send_call_func_ipi)(const struct cpumask *mask); 81 void (*send_call_func_single_ipi)(int cpu); 82 }; 83 84 /* Globals due to paravirt */ 85 extern void set_cpu_sibling_map(int cpu); 86 87 #ifdef CONFIG_SMP 88 #ifndef CONFIG_PARAVIRT 89 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0) 90 #endif 91 extern struct smp_ops smp_ops; 92 93 static inline void smp_send_stop(void) 94 { 95 smp_ops.stop_other_cpus(0); 96 } 97 98 static inline void stop_other_cpus(void) 99 { 100 smp_ops.stop_other_cpus(1); 101 } 102 103 static inline void smp_prepare_boot_cpu(void) 104 { 105 smp_ops.smp_prepare_boot_cpu(); 106 } 107 108 static inline void smp_prepare_cpus(unsigned int max_cpus) 109 { 110 smp_ops.smp_prepare_cpus(max_cpus); 111 } 112 113 static inline void smp_cpus_done(unsigned int max_cpus) 114 { 115 smp_ops.smp_cpus_done(max_cpus); 116 } 117 118 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle) 119 { 120 return smp_ops.cpu_up(cpu, tidle); 121 } 122 123 static inline int __cpu_disable(void) 124 { 125 return smp_ops.cpu_disable(); 126 } 127 128 static inline void __cpu_die(unsigned int cpu) 129 { 130 smp_ops.cpu_die(cpu); 131 } 132 133 static inline void play_dead(void) 134 { 135 smp_ops.play_dead(); 136 } 137 138 static inline void smp_send_reschedule(int cpu) 139 { 140 smp_ops.smp_send_reschedule(cpu); 141 } 142 143 static inline void arch_send_call_function_single_ipi(int cpu) 144 { 145 smp_ops.send_call_func_single_ipi(cpu); 146 } 147 148 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 149 { 150 smp_ops.send_call_func_ipi(mask); 151 } 152 153 void cpu_disable_common(void); 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