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