c2d1cec1c7
Impact: use new cpumask API to reduce memory and stack usage
Allocate the following local cpumasks based on the number of cpus that
are present. References will use new cpumask API. (Currently only
modified for x86_64, x86_32 continues to use the *_map variants.)
cpu_callin_mask
cpu_callout_mask
cpu_initialized_mask
cpu_sibling_setup_mask
Provide the following accessor functions:
struct cpumask *cpu_sibling_mask(int cpu)
struct cpumask *cpu_core_mask(int cpu)
Other changes are when setting or clearing the cpu online, possible
or present maps, use the accessor functions.
Signed-off-by: Mike Travis <travis@sgi.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
262 lines
6.0 KiB
C
262 lines
6.0 KiB
C
#ifndef _ASM_X86_SMP_H
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#define _ASM_X86_SMP_H
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#ifndef __ASSEMBLY__
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#include <linux/cpumask.h>
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#include <linux/init.h>
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#include <asm/percpu.h>
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/*
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* We need the APIC definitions automatically as part of 'smp.h'
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*/
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#ifdef CONFIG_X86_LOCAL_APIC
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# include <asm/mpspec.h>
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# include <asm/apic.h>
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# ifdef CONFIG_X86_IO_APIC
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# include <asm/io_apic.h>
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# endif
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#endif
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#include <asm/pda.h>
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#include <asm/thread_info.h>
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#ifdef CONFIG_X86_64
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extern cpumask_var_t cpu_callin_mask;
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extern cpumask_var_t cpu_callout_mask;
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extern cpumask_var_t cpu_initialized_mask;
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extern cpumask_var_t cpu_sibling_setup_mask;
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#else /* CONFIG_X86_32 */
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extern cpumask_t cpu_callin_map;
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extern cpumask_t cpu_callout_map;
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extern cpumask_t cpu_initialized;
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extern cpumask_t cpu_sibling_setup_map;
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#define cpu_callin_mask ((struct cpumask *)&cpu_callin_map)
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#define cpu_callout_mask ((struct cpumask *)&cpu_callout_map)
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#define cpu_initialized_mask ((struct cpumask *)&cpu_initialized)
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#define cpu_sibling_setup_mask ((struct cpumask *)&cpu_sibling_setup_map)
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#endif /* CONFIG_X86_32 */
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extern void (*mtrr_hook)(void);
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extern void zap_low_mappings(void);
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extern int __cpuinit get_local_pda(int cpu);
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extern int smp_num_siblings;
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extern unsigned int num_processors;
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DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
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DECLARE_PER_CPU(cpumask_t, cpu_core_map);
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DECLARE_PER_CPU(u16, cpu_llc_id);
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#ifdef CONFIG_X86_32
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DECLARE_PER_CPU(int, cpu_number);
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#endif
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static inline struct cpumask *cpu_sibling_mask(int cpu)
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{
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return &per_cpu(cpu_sibling_map, cpu);
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}
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static inline struct cpumask *cpu_core_mask(int cpu)
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{
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return &per_cpu(cpu_core_map, cpu);
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}
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DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid);
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DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
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/* Static state in head.S used to set up a CPU */
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extern struct {
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void *sp;
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unsigned short ss;
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} stack_start;
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struct smp_ops {
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void (*smp_prepare_boot_cpu)(void);
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void (*smp_prepare_cpus)(unsigned max_cpus);
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void (*smp_cpus_done)(unsigned max_cpus);
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void (*smp_send_stop)(void);
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void (*smp_send_reschedule)(int cpu);
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int (*cpu_up)(unsigned cpu);
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int (*cpu_disable)(void);
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void (*cpu_die)(unsigned int cpu);
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void (*play_dead)(void);
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void (*send_call_func_ipi)(const struct cpumask *mask);
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void (*send_call_func_single_ipi)(int cpu);
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};
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/* Globals due to paravirt */
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extern void set_cpu_sibling_map(int cpu);
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#ifdef CONFIG_SMP
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#ifndef CONFIG_PARAVIRT
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#define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
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#endif
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extern struct smp_ops smp_ops;
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static inline void smp_send_stop(void)
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{
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smp_ops.smp_send_stop();
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}
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static inline void smp_prepare_boot_cpu(void)
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{
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smp_ops.smp_prepare_boot_cpu();
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}
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static inline void smp_prepare_cpus(unsigned int max_cpus)
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{
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smp_ops.smp_prepare_cpus(max_cpus);
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}
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static inline void smp_cpus_done(unsigned int max_cpus)
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{
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smp_ops.smp_cpus_done(max_cpus);
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}
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static inline int __cpu_up(unsigned int cpu)
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{
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return smp_ops.cpu_up(cpu);
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}
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static inline int __cpu_disable(void)
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{
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return smp_ops.cpu_disable();
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}
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static inline void __cpu_die(unsigned int cpu)
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{
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smp_ops.cpu_die(cpu);
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}
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static inline void play_dead(void)
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{
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smp_ops.play_dead();
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}
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static inline void smp_send_reschedule(int cpu)
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{
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smp_ops.smp_send_reschedule(cpu);
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}
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static inline void arch_send_call_function_single_ipi(int cpu)
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{
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smp_ops.send_call_func_single_ipi(cpu);
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}
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static inline void arch_send_call_function_ipi(cpumask_t mask)
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{
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smp_ops.send_call_func_ipi(&mask);
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}
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void cpu_disable_common(void);
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void native_smp_prepare_boot_cpu(void);
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void native_smp_prepare_cpus(unsigned int max_cpus);
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void native_smp_cpus_done(unsigned int max_cpus);
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int native_cpu_up(unsigned int cpunum);
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int native_cpu_disable(void);
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void native_cpu_die(unsigned int cpu);
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void native_play_dead(void);
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void play_dead_common(void);
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void native_send_call_func_ipi(const struct cpumask *mask);
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void native_send_call_func_single_ipi(int cpu);
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extern void prefill_possible_map(void);
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void smp_store_cpu_info(int id);
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#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
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/* We don't mark CPUs online until __cpu_up(), so we need another measure */
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static inline int num_booting_cpus(void)
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{
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return cpumask_weight(cpu_callout_mask);
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}
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#else
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static inline void prefill_possible_map(void)
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{
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}
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#endif /* CONFIG_SMP */
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extern unsigned disabled_cpus __cpuinitdata;
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#ifdef CONFIG_X86_32_SMP
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/*
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* This function is needed by all SMP systems. It must _always_ be valid
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* from the initial startup. We map APIC_BASE very early in page_setup(),
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* so this is correct in the x86 case.
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*/
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#define raw_smp_processor_id() (x86_read_percpu(cpu_number))
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extern int safe_smp_processor_id(void);
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#elif defined(CONFIG_X86_64_SMP)
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#define raw_smp_processor_id() read_pda(cpunumber)
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#define stack_smp_processor_id() \
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({ \
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struct thread_info *ti; \
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__asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
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ti->cpu; \
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})
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#define safe_smp_processor_id() smp_processor_id()
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#else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */
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#define cpu_physical_id(cpu) boot_cpu_physical_apicid
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#define safe_smp_processor_id() 0
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#define stack_smp_processor_id() 0
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#endif
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#ifdef CONFIG_X86_LOCAL_APIC
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#ifndef CONFIG_X86_64
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static inline int logical_smp_processor_id(void)
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{
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/* we don't want to mark this access volatile - bad code generation */
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return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
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}
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#include <mach_apicdef.h>
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static inline unsigned int read_apic_id(void)
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{
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unsigned int reg;
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reg = *(u32 *)(APIC_BASE + APIC_ID);
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return GET_APIC_ID(reg);
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}
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#endif
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# if defined(APIC_DEFINITION) || defined(CONFIG_X86_64)
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extern int hard_smp_processor_id(void);
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# else
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#include <mach_apicdef.h>
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static inline int hard_smp_processor_id(void)
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{
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/* we don't want to mark this access volatile - bad code generation */
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return read_apic_id();
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}
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# endif /* APIC_DEFINITION */
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#else /* CONFIG_X86_LOCAL_APIC */
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# ifndef CONFIG_SMP
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# define hard_smp_processor_id() 0
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# endif
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#endif /* CONFIG_X86_LOCAL_APIC */
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#ifdef CONFIG_X86_HAS_BOOT_CPU_ID
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extern unsigned char boot_cpu_id;
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#else
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#define boot_cpu_id 0
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_X86_SMP_H */
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