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 21extern int smp_num_siblings; 22extern unsigned int num_processors; 23 24static 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 33DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map); 34DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map); 35/* cpus sharing the last level cache: */ 36DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map); 37DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id); 38DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number); 39 40static inline struct cpumask *cpu_sibling_mask(int cpu) 41{ 42 return per_cpu(cpu_sibling_map, cpu); 43} 44 45static inline struct cpumask *cpu_core_mask(int cpu) 46{ 47 return per_cpu(cpu_core_map, cpu); 48} 49 50static inline struct cpumask *cpu_llc_shared_mask(int cpu) 51{ 52 return per_cpu(cpu_llc_shared_map, cpu); 53} 54 55DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid); 56DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid); 57#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32) 58DECLARE_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 */ 62extern unsigned long stack_start; /* Initial stack pointer address */ 63 64struct task_struct; 65 66struct 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 */ 84extern 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 90extern struct smp_ops smp_ops; 91 92static inline void smp_send_stop(void) 93{ 94 smp_ops.stop_other_cpus(0); 95} 96 97static inline void stop_other_cpus(void) 98{ 99 smp_ops.stop_other_cpus(1); 100} 101 102static inline void smp_prepare_boot_cpu(void) 103{ 104 smp_ops.smp_prepare_boot_cpu(); 105} 106 107static inline void smp_prepare_cpus(unsigned int max_cpus) 108{ 109 smp_ops.smp_prepare_cpus(max_cpus); 110} 111 112static inline void smp_cpus_done(unsigned int max_cpus) 113{ 114 smp_ops.smp_cpus_done(max_cpus); 115} 116 117static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle) 118{ 119 return smp_ops.cpu_up(cpu, tidle); 120} 121 122static inline int __cpu_disable(void) 123{ 124 return smp_ops.cpu_disable(); 125} 126 127static inline void __cpu_die(unsigned int cpu) 128{ 129 smp_ops.cpu_die(cpu); 130} 131 132static inline void play_dead(void) 133{ 134 smp_ops.play_dead(); 135} 136 137static inline void smp_send_reschedule(int cpu) 138{ 139 smp_ops.smp_send_reschedule(cpu); 140} 141 142static inline void arch_send_call_function_single_ipi(int cpu) 143{ 144 smp_ops.send_call_func_single_ipi(cpu); 145} 146 147static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 148{ 149 smp_ops.send_call_func_ipi(mask); 150} 151 152void cpu_disable_common(void); 153void cpu_die_common(unsigned int cpu); 154void native_smp_prepare_boot_cpu(void); 155void native_smp_prepare_cpus(unsigned int max_cpus); 156void native_smp_cpus_done(unsigned int max_cpus); 157int native_cpu_up(unsigned int cpunum, struct task_struct *tidle); 158int native_cpu_disable(void); 159void native_cpu_die(unsigned int cpu); 160void native_play_dead(void); 161void play_dead_common(void); 162void wbinvd_on_cpu(int cpu); 163int wbinvd_on_all_cpus(void); 164 165void native_send_call_func_ipi(const struct cpumask *mask); 166void native_send_call_func_single_ipi(int cpu); 167void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle); 168 169void smp_store_boot_cpu_info(void); 170void 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() 175static inline int wbinvd_on_all_cpus(void) 176{ 177 wbinvd(); 178 return 0; 179} 180#endif /* CONFIG_SMP */ 181 182extern 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)) 191extern 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 209static 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 217extern 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 228extern 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