diff options
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 85 | ||||
| -rw-r--r-- | arch/x86/kernel/smpboot_32.c | 67 | ||||
| -rw-r--r-- | arch/x86/kernel/smpboot_64.c | 79 | ||||
| -rw-r--r-- | include/asm-x86/smp.h | 3 | ||||
| -rw-r--r-- | include/asm-x86/smp_32.h | 3 | ||||
| -rw-r--r-- | include/asm-x86/smp_64.h | 3 |
6 files changed, 88 insertions, 152 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 644e60969f9..c35cd319d1e 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -2,6 +2,13 @@ #include <linux/smp.h> #include <linux/module.h> #include <linux/sched.h> +#include <linux/percpu.h> + +#include <asm/nmi.h> +#include <asm/irq.h> +#include <asm/smp.h> +#include <asm/cpu.h> +#include <asm/numa.h> /* Number of siblings per CPU package */ int smp_num_siblings = 1; @@ -181,5 +188,83 @@ __init void prefill_possible_map(void) for (i = 0; i < possible; i++) cpu_set(i, cpu_possible_map); } + +static void __ref remove_cpu_from_maps(int cpu) +{ + cpu_clear(cpu, cpu_online_map); +#ifdef CONFIG_X86_64 + cpu_clear(cpu, cpu_callout_map); + cpu_clear(cpu, cpu_callin_map); + /* was set by cpu_init() */ + clear_bit(cpu, (unsigned long *)&cpu_initialized); + clear_node_cpumask(cpu); +#endif +} + +int __cpu_disable(void) +{ + int cpu = smp_processor_id(); + + /* + * Perhaps use cpufreq to drop frequency, but that could go + * into generic code. + * + * We won't take down the boot processor on i386 due to some + * interrupts only being able to be serviced by the BSP. + * Especially so if we're not using an IOAPIC -zwane + */ + if (cpu == 0) + return -EBUSY; + + if (nmi_watchdog == NMI_LOCAL_APIC) + stop_apic_nmi_watchdog(NULL); + clear_local_APIC(); + + /* + * HACK: + * Allow any queued timer interrupts to get serviced + * This is only a temporary solution until we cleanup + * fixup_irqs as we do for IA64. + */ + local_irq_enable(); + mdelay(1); + + local_irq_disable(); + remove_siblinginfo(cpu); + + /* It's now safe to remove this processor from the online map */ + remove_cpu_from_maps(cpu); + fixup_irqs(cpu_online_map); + return 0; +} + +void __cpu_die(unsigned int cpu) +{ + /* We don't do anything here: idle task is faking death itself. */ + unsigned int i; + + for (i = 0; i < 10; i++) { + /* They ack this in play_dead by setting CPU_DEAD */ + if (per_cpu(cpu_state, cpu) == CPU_DEAD) { + printk(KERN_INFO "CPU %d is now offline\n", cpu); + if (1 == num_online_cpus()) + alternatives_smp_switch(0); + return; + } + msleep(100); + } + printk(KERN_ERR "CPU %u didn't die...\n", cpu); +} +#else /* ... !CONFIG_HOTPLUG_CPU */ +int __cpu_disable(void) +{ + return -ENOSYS; +} + +void __cpu_die(unsigned int cpu) +{ + /* We said "no" in __cpu_disable */ + BUG(); +} #endif diff --git a/arch/x86/kernel/smpboot_32.c b/arch/x86/kernel/smpboot_32.c index 3d21c663aa7..00b1b59cd56 100644 --- a/arch/x86/kernel/smpboot_32.c +++ b/arch/x86/kernel/smpboot_32.c @@ -1040,73 +1040,6 @@ void __init native_smp_prepare_boot_cpu(void) __get_cpu_var(cpu_state) = CPU_ONLINE; } -#ifdef CONFIG_HOTPLUG_CPU -static void __ref remove_cpu_from_maps(int cpu) -{ - cpu_clear(cpu, cpu_online_map); -} - -int __cpu_disable(void) -{ - cpumask_t map = cpu_online_map; - int cpu = smp_processor_id(); - - /* - * Perhaps use cpufreq to drop frequency, but that could go - * into generic code. - * - * We won't take down the boot processor on i386 due to some - * interrupts only being able to be serviced by the BSP. - * Especially so if we're not using an IOAPIC -zwane - */ - if (cpu == 0) - return -EBUSY; - if (nmi_watchdog == NMI_LOCAL_APIC) - stop_apic_nmi_watchdog(NULL); - clear_local_APIC(); - /* Allow any queued timer interrupts to get serviced */ - local_irq_enable(); - mdelay(1); - local_irq_disable(); - - remove_siblinginfo(cpu); - - remove_cpu_from_maps(cpu); - fixup_irqs(map); - - return 0; -} - -void __cpu_die(unsigned int cpu) -{ - /* We don't do anything here: idle task is faking death itself. */ - unsigned int i; - - for (i = 0; i < 10; i++) { - /* They ack this in play_dead by setting CPU_DEAD */ - if (per_cpu(cpu_state, cpu) == CPU_DEAD) { - printk ("CPU %d is now offline\n", cpu); - if (1 == num_online_cpus()) - alternatives_smp_switch(0); - return; - } - msleep(100); - } - printk(KERN_ERR "CPU %u didn't die...\n", cpu); -} -#else /* ... !CONFIG_HOTPLUG_CPU */ -int __cpu_disable(void) -{ - return -ENOSYS; -} - -void __cpu_die(unsigned int cpu) -{ - /* We said "no" in __cpu_disable */ - BUG(); -} -#endif /* CONFIG_HOTPLUG_CPU */ - int __cpuinit native_cpu_up(unsigned int cpu) { unsigned long flags; diff --git a/arch/x86/kernel/smpboot_64.c b/arch/x86/kernel/smpboot_64.c index 6509d3c1b3d..0c67e5ae9c9 100644 --- a/arch/x86/kernel/smpboot_64.c +++ b/arch/x86/kernel/smpboot_64.c @@ -836,82 +836,3 @@ void __init native_smp_cpus_done(unsigned int max_cpus) setup_ioapic_dest(); check_nmi_watchdog(); } - -#ifdef CONFIG_HOTPLUG_CPU -static void __ref remove_cpu_from_maps(int cpu) -{ - cpu_clear(cpu, cpu_online_map); - cpu_clear(cpu, cpu_callout_map); - cpu_clear(cpu, cpu_callin_map); - clear_bit(cpu, (unsigned long *)&cpu_initialized); /* was set by cpu_init() */ - clear_node_cpumask(cpu); -} - -int __cpu_disable(void) -{ - int cpu = smp_processor_id(); - - /* - * Perhaps use cpufreq to drop frequency, but that could go - * into generic code. - * - * We won't take down the boot processor on i386 due to some - * interrupts only being able to be serviced by the BSP. - * Especially so if we're not using an IOAPIC -zwane - */ - if (cpu == 0) - return -EBUSY; - - if (nmi_watchdog == NMI_LOCAL_APIC) - stop_apic_nmi_watchdog(NULL); - clear_local_APIC(); - - /* - * HACK: - * Allow any queued timer interrupts to get serviced - * This is only a temporary solution until we cleanup - * fixup_irqs as we do for IA64. - */ - local_irq_enable(); - mdelay(1); - - local_irq_disable(); - remove_siblinginfo(cpu); - - /* It's now safe to remove this processor from the online map */ - remove_cpu_from_maps(cpu); - fixup_irqs(cpu_online_map); - return 0; -} - -void __cpu_die(unsigned int cpu) -{ - /* We don't do anything here: idle task is faking death itself. */ - unsigned int i; - - for (i = 0; i < 10; i++) { - /* They ack this in play_dead by setting CPU_DEAD */ - if (per_cpu(cpu_state, cpu) == CPU_DEAD) { - printk ("CPU %d is now offline\n", cpu); - if (1 == num_online_cpus()) - alternatives_smp_switch(0); - return; - } - msleep(100); - } - printk(KERN_ERR "CPU %u didn't die...\n", cpu); -} - -#else /* ... !CONFIG_HOTPLUG_CPU */ - -int __cpu_disable(void) -{ - return -ENOSYS; -} - -void __cpu_die(unsigned int cpu) -{ - /* We said "no" in __cpu_disable */ - BUG(); -} -#endif /* CONFIG_HOTPLUG_CPU */ diff --git a/include/asm-x86/smp.h b/include/asm-x86/smp.h index c800b815d37..27d9f659523 100644 --- a/include/asm-x86/smp.h +++ b/include/asm-x86/smp.h @@ -70,6 +70,9 @@ void native_smp_prepare_cpus(unsigned int max_cpus); void native_smp_cpus_done(unsigned int max_cpus); int native_cpu_up(unsigned int cpunum); +extern int __cpu_disable(void); +extern void __cpu_die(unsigned int cpu); + extern unsigned disabled_cpus; extern void prefill_possible_map(void); #endif diff --git a/include/asm-x86/smp_32.h b/include/asm-x86/smp_32.h index 0b251346887..4fec2feb6ac 100644 --- a/include/asm-x86/smp_32.h +++ b/include/asm-x86/smp_32.h @@ -34,9 +34,6 @@ DECLARE_PER_CPU(u16, x86_cpu_to_apicid); #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0) #endif -extern int __cpu_disable(void); -extern void __cpu_die(unsigned int cpu); - /* * This function is needed by all SMP systems. It must _always_ be valid * from the initial startup. We map APIC_BASE very early in page_setup(), diff --git a/include/asm-x86/smp_64.h b/include/asm-x86/smp_64.h index 1ecf8134bdc..d554d7d5732 100644 --- a/include/asm-x86/smp_64.h +++ b/include/asm-x86/smp_64.h @@ -42,9 +42,6 @@ static inline int cpu_present_to_apicid(int mps_cpu) #define SMP_TRAMPOLINE_BASE 0x6000 -extern int __cpu_disable(void); -extern void __cpu_die(unsigned int cpu); - #define raw_smp_processor_id() read_pda(cpunumber) #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) |