ia64/xen-unstable

view xen/include/asm-x86/smp.h @ 15623:858b9bc8d0e6

SMP support for Xen PM.

Add SMP sleep support to Xen. One new utility is created
to allow vcpu continue previous running after migration
to new processor.

Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Keir Fraser <keir@xensource.com>
author kfraser@localhost.localdomain
date Thu Jul 19 13:23:33 2007 +0100 (2007-07-19)
parents c3929e540632
children 4034317507de
line source
1 #ifndef __ASM_SMP_H
2 #define __ASM_SMP_H
4 /*
5 * We need the APIC definitions automatically as part of 'smp.h'
6 */
7 #ifndef __ASSEMBLY__
8 #include <xen/config.h>
9 #include <xen/kernel.h>
10 #include <xen/cpumask.h>
11 #include <asm/current.h>
12 #endif
14 #ifdef CONFIG_X86_LOCAL_APIC
15 #ifndef __ASSEMBLY__
16 #include <asm/fixmap.h>
17 #include <asm/bitops.h>
18 #include <asm/mpspec.h>
19 #ifdef CONFIG_X86_IO_APIC
20 #include <asm/io_apic.h>
21 #endif
22 #include <asm/apic.h>
23 #endif
24 #endif
26 #define BAD_APICID 0xFFu
27 #ifdef CONFIG_SMP
28 #ifndef __ASSEMBLY__
30 /*
31 * Private routines/data
32 */
34 extern void smp_alloc_memory(void);
35 extern int pic_mode;
36 extern int smp_num_siblings;
37 extern cpumask_t cpu_sibling_map[];
38 extern cpumask_t cpu_core_map[];
40 extern void (*mtrr_hook) (void);
42 #ifdef CONFIG_X86_64
43 extern void zap_low_mappings(void);
44 #else
45 extern void zap_low_mappings(l2_pgentry_t *base);
46 #endif
48 #define MAX_APICID 256
49 extern u8 x86_cpu_to_apicid[];
51 #define cpu_physical_id(cpu) x86_cpu_to_apicid[cpu]
53 /* State of each CPU. */
54 #define CPU_ONLINE 0x0002 /* CPU is up */
55 #define CPU_DYING 0x0003 /* CPU is requested to die */
56 #define CPU_DEAD 0x0004 /* CPU is dead */
57 DECLARE_PER_CPU(int, cpu_state);
59 #ifdef CONFIG_HOTPLUG_CPU
60 #define cpu_is_offline(cpu) unlikely(per_cpu(cpu_state,cpu) == CPU_DYING)
61 extern int cpu_down(unsigned int cpu);
62 extern int cpu_up(unsigned int cpu);
63 extern void cpu_exit_clear(void);
64 extern void cpu_uninit(void);
65 extern void disable_nonboot_cpus(void);
66 extern void enable_nonboot_cpus(void);
67 #else
68 static inline int cpu_is_offline(int cpu) {return 0;}
69 static inline void disable_nonboot_cpus(void) {}
70 static inline void enable_nonboot_cpus(void) {}
71 #endif
73 /*
74 * This function is needed by all SMP systems. It must _always_ be valid
75 * from the initial startup. We map APIC_BASE very early in page_setup(),
76 * so this is correct in the x86 case.
77 */
78 #define raw_smp_processor_id() (get_processor_id())
80 extern cpumask_t cpu_callout_map;
81 extern cpumask_t cpu_callin_map;
82 extern cpumask_t cpu_possible_map;
84 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
85 static inline int num_booting_cpus(void)
86 {
87 return cpus_weight(cpu_callout_map);
88 }
90 #ifdef CONFIG_X86_LOCAL_APIC
92 static inline int hard_smp_processor_id(void)
93 {
94 /* we don't want to mark this access volatile - bad code generation */
95 return GET_APIC_ID(*(unsigned int *)(APIC_BASE+APIC_ID));
96 }
98 static __inline int logical_smp_processor_id(void)
99 {
100 /* we don't want to mark this access volatile - bad code generation */
101 return GET_APIC_LOGICAL_ID(*(unsigned int *)(APIC_BASE+APIC_LDR));
102 }
104 #endif
106 extern int __cpu_disable(void);
107 extern void __cpu_die(unsigned int cpu);
108 #endif /* !__ASSEMBLY__ */
110 #else /* CONFIG_SMP */
112 #define cpu_physical_id(cpu) boot_cpu_physical_apicid
114 #define NO_PROC_ID 0xFF /* No processor magic marker */
116 #endif
117 #endif