diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index bea3a0159496..1e851b1ff61b 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -886,11 +886,11 @@ config X86_UP_IOAPIC config X86_LOCAL_APIC def_bool y depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC || PCI_MSI + select GENERIC_IRQ_LEGACY_ALLOC_HWIRQ config X86_IO_APIC def_bool y depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_IOAPIC || PCI_MSI - select GENERIC_IRQ_LEGACY_ALLOC_HWIRQ select IRQ_DOMAIN config X86_REROUTE_FOR_BROKEN_BOOT_IRQS diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h index 454c9e4056e6..ef50db16bb44 100644 --- a/arch/x86/include/asm/hw_irq.h +++ b/arch/x86/include/asm/hw_irq.h @@ -111,6 +111,8 @@ struct irq_2_irte { #endif /* CONFIG_IRQ_REMAP */ #ifdef CONFIG_X86_LOCAL_APIC +struct irq_data; + struct irq_cfg { cpumask_var_t domain; cpumask_var_t old_domain; @@ -134,28 +136,27 @@ struct irq_cfg { extern struct irq_cfg *irq_cfg(unsigned int irq); extern struct irq_cfg *irqd_cfg(struct irq_data *irq_data); -extern void setup_vector_irq(int cpu); +extern struct irq_cfg *alloc_irq_and_cfg_at(unsigned int at, int node); +extern void lock_vector_lock(void); +extern void unlock_vector_lock(void); extern int assign_irq_vector(int, struct irq_cfg *, const struct cpumask *); +extern void clear_irq_vector(int irq, struct irq_cfg *cfg); +extern void setup_vector_irq(int cpu); #ifdef CONFIG_SMP extern void send_cleanup_vector(struct irq_cfg *); #else static inline void send_cleanup_vector(struct irq_cfg *c) { } #endif +extern void irq_complete_move(struct irq_cfg *cfg); -struct irq_data; -int apic_set_affinity(struct irq_data *, const struct cpumask *, - unsigned int *dest_id); -#endif /* CONFIG_X86_LOCAL_APIC */ - -#ifdef CONFIG_X86_IO_APIC -extern void lock_vector_lock(void); -extern void unlock_vector_lock(void); -extern void __setup_vector_irq(int cpu); -#else +extern int apic_retrigger_irq(struct irq_data *data); +extern void apic_ack_edge(struct irq_data *data); +extern int apic_set_affinity(struct irq_data *data, const struct cpumask *mask, + unsigned int *dest_id); +#else /* CONFIG_X86_LOCAL_APIC */ static inline void lock_vector_lock(void) {} static inline void unlock_vector_lock(void) {} -static inline void __setup_vector_irq(int cpu) {} -#endif +#endif /* CONFIG_X86_LOCAL_APIC */ /* IOAPIC */ #ifdef CONFIG_X86_IO_APIC @@ -181,11 +182,13 @@ extern void enable_IO_APIC(void); extern void disable_IO_APIC(void); extern void setup_ioapic_dest(void); extern int IO_APIC_get_PCI_irq_vector(int bus, int devfn, int pin); +extern void print_IO_APICs(void); extern unsigned long io_apic_irqs; #define IO_APIC_IRQ(x) (((x) >= NR_IRQS_LEGACY) || ((1 << (x)) & io_apic_irqs)) #else /* CONFIG_X86_IO_APIC */ #define IO_APIC_IRQ(x) 0 +static inline void print_IO_APICs(void) {} #endif /* CONFIG_X86_IO_APIC */ /* Statistics */ diff --git a/arch/x86/kernel/apic/Makefile b/arch/x86/kernel/apic/Makefile index dcb5b15401ce..84299e5d10dc 100644 --- a/arch/x86/kernel/apic/Makefile +++ b/arch/x86/kernel/apic/Makefile @@ -2,7 +2,7 @@ # Makefile for local APIC drivers and for the IO-APIC code # -obj-$(CONFIG_X86_LOCAL_APIC) += apic.o apic_noop.o ipi.o +obj-$(CONFIG_X86_LOCAL_APIC) += apic.o apic_noop.o ipi.o vector.o obj-y += hw_nmi.o obj-$(CONFIG_X86_IO_APIC) += io_apic.o diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 783468efa4a1..677044df2d7a 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -61,8 +61,6 @@ #include -#define __apicdebuginit(type) static type __init - #define for_each_ioapic(idx) \ for ((idx) = 0; (idx) < nr_ioapics; (idx)++) #define for_each_ioapic_reverse(idx) \ @@ -83,7 +81,6 @@ int sis_apic_bug = -1; static DEFINE_RAW_SPINLOCK(ioapic_lock); -static DEFINE_RAW_SPINLOCK(vector_lock); static DEFINE_MUTEX(ioapic_mutex); static unsigned int ioapic_dynirq_base; static int ioapic_initialized; @@ -206,8 +203,6 @@ static int __init parse_noapic(char *str) } early_param("noapic", parse_noapic); -static struct irq_cfg *alloc_irq_and_cfg_at(unsigned int at, int node); - /* Will be called in mpparse/acpi/sfi codes for saving IRQ info */ void mp_save_irq(struct mpc_intsrc *m) { @@ -281,67 +276,6 @@ int __init arch_early_irq_init(void) return 0; } -struct irq_cfg *irq_cfg(unsigned int irq) -{ - return irq_get_chip_data(irq); -} - -struct irq_cfg *irqd_cfg(struct irq_data *irq_data) -{ - return irq_data->chip_data; -} - -static struct irq_cfg *alloc_irq_cfg(unsigned int irq, int node) -{ - struct irq_cfg *cfg; - - cfg = kzalloc_node(sizeof(*cfg), GFP_KERNEL, node); - if (!cfg) - return NULL; - if (!zalloc_cpumask_var_node(&cfg->domain, GFP_KERNEL, node)) - goto out_cfg; - if (!zalloc_cpumask_var_node(&cfg->old_domain, GFP_KERNEL, node)) - goto out_domain; - INIT_LIST_HEAD(&cfg->irq_2_pin); - return cfg; -out_domain: - free_cpumask_var(cfg->domain); -out_cfg: - kfree(cfg); - return NULL; -} - -static void free_irq_cfg(unsigned int at, struct irq_cfg *cfg) -{ - if (!cfg) - return; - irq_set_chip_data(at, NULL); - free_cpumask_var(cfg->domain); - free_cpumask_var(cfg->old_domain); - kfree(cfg); -} - -static struct irq_cfg *alloc_irq_and_cfg_at(unsigned int at, int node) -{ - int res = irq_alloc_desc_at(at, node); - struct irq_cfg *cfg; - - if (res < 0) { - if (res != -EEXIST) - return NULL; - cfg = irq_cfg(at); - if (cfg) - return cfg; - } - - cfg = alloc_irq_cfg(at, node); - if (cfg) - irq_set_chip_data(at, cfg); - else - irq_free_desc(at); - return cfg; -} - struct io_apic { unsigned int index; unsigned int unused[3]; @@ -1238,190 +1172,6 @@ out: } EXPORT_SYMBOL(IO_APIC_get_PCI_irq_vector); -void lock_vector_lock(void) -{ - /* Used to the online set of cpus does not change - * during assign_irq_vector. - */ - raw_spin_lock(&vector_lock); -} - -void unlock_vector_lock(void) -{ - raw_spin_unlock(&vector_lock); -} - -static int -__assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask) -{ - /* - * NOTE! The local APIC isn't very good at handling - * multiple interrupts at the same interrupt level. - * As the interrupt level is determined by taking the - * vector number and shifting that right by 4, we - * want to spread these out a bit so that they don't - * all fall in the same interrupt level. - * - * Also, we've got to be careful not to trash gate - * 0x80, because int 0x80 is hm, kind of importantish. ;) - */ - static int current_vector = FIRST_EXTERNAL_VECTOR + VECTOR_OFFSET_START; - static int current_offset = VECTOR_OFFSET_START % 16; - int cpu, err; - cpumask_var_t tmp_mask; - - if (cfg->move_in_progress) - return -EBUSY; - - if (!alloc_cpumask_var(&tmp_mask, GFP_ATOMIC)) - return -ENOMEM; - - /* Only try and allocate irqs on cpus that are present */ - err = -ENOSPC; - cpumask_clear(cfg->old_domain); - cpu = cpumask_first_and(mask, cpu_online_mask); - while (cpu < nr_cpu_ids) { - int new_cpu, vector, offset; - - apic->vector_allocation_domain(cpu, tmp_mask, mask); - - if (cpumask_subset(tmp_mask, cfg->domain)) { - err = 0; - if (cpumask_equal(tmp_mask, cfg->domain)) - break; - /* - * New cpumask using the vector is a proper subset of - * the current in use mask. So cleanup the vector - * allocation for the members that are not used anymore. - */ - cpumask_andnot(cfg->old_domain, cfg->domain, tmp_mask); - cfg->move_in_progress = - cpumask_intersects(cfg->old_domain, cpu_online_mask); - cpumask_and(cfg->domain, cfg->domain, tmp_mask); - break; - } - - vector = current_vector; - offset = current_offset; -next: - vector += 16; - if (vector >= first_system_vector) { - offset = (offset + 1) % 16; - vector = FIRST_EXTERNAL_VECTOR + offset; - } - - if (unlikely(current_vector == vector)) { - cpumask_or(cfg->old_domain, cfg->old_domain, tmp_mask); - cpumask_andnot(tmp_mask, mask, cfg->old_domain); - cpu = cpumask_first_and(tmp_mask, cpu_online_mask); - continue; - } - - if (test_bit(vector, used_vectors)) - goto next; - - for_each_cpu_and(new_cpu, tmp_mask, cpu_online_mask) { - if (per_cpu(vector_irq, new_cpu)[vector] > VECTOR_UNDEFINED) - goto next; - } - /* Found one! */ - current_vector = vector; - current_offset = offset; - if (cfg->vector) { - cpumask_copy(cfg->old_domain, cfg->domain); - cfg->move_in_progress = - cpumask_intersects(cfg->old_domain, cpu_online_mask); - } - for_each_cpu_and(new_cpu, tmp_mask, cpu_online_mask) - per_cpu(vector_irq, new_cpu)[vector] = irq; - cfg->vector = vector; - cpumask_copy(cfg->domain, tmp_mask); - err = 0; - break; - } - free_cpumask_var(tmp_mask); - return err; -} - -int assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask) -{ - int err; - unsigned long flags; - - raw_spin_lock_irqsave(&vector_lock, flags); - err = __assign_irq_vector(irq, cfg, mask); - raw_spin_unlock_irqrestore(&vector_lock, flags); - return err; -} - -static void clear_irq_vector(int irq, struct irq_cfg *cfg) -{ - int cpu, vector; - unsigned long flags; - - raw_spin_lock_irqsave(&vector_lock, flags); - BUG_ON(!cfg->vector); - - vector = cfg->vector; - for_each_cpu_and(cpu, cfg->domain, cpu_online_mask) - per_cpu(vector_irq, cpu)[vector] = VECTOR_UNDEFINED; - - cfg->vector = 0; - cpumask_clear(cfg->domain); - - if (likely(!cfg->move_in_progress)) { - raw_spin_unlock_irqrestore(&vector_lock, flags); - return; - } - - for_each_cpu_and(cpu, cfg->old_domain, cpu_online_mask) { - for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) { - if (per_cpu(vector_irq, cpu)[vector] != irq) - continue; - per_cpu(vector_irq, cpu)[vector] = VECTOR_UNDEFINED; - break; - } - } - cfg->move_in_progress = 0; - raw_spin_unlock_irqrestore(&vector_lock, flags); -} - -void __setup_vector_irq(int cpu) -{ - /* Initialize vector_irq on a new cpu */ - int irq, vector; - struct irq_cfg *cfg; - - /* - * vector_lock will make sure that we don't run into irq vector - * assignments that might be happening on another cpu in parallel, - * while we setup our initial vector to irq mappings. - */ - raw_spin_lock(&vector_lock); - /* Mark the inuse vectors */ - for_each_active_irq(irq) { - cfg = irq_cfg(irq); - if (!cfg) - continue; - - if (!cpumask_test_cpu(cpu, cfg->domain)) - continue; - vector = cfg->vector; - per_cpu(vector_irq, cpu)[vector] = irq; - } - /* Mark the free vectors */ - for (vector = 0; vector < NR_VECTORS; ++vector) { - irq = per_cpu(vector_irq, cpu)[vector]; - if (irq <= VECTOR_UNDEFINED) - continue; - - cfg = irq_cfg(irq); - if (!cpumask_test_cpu(cpu, cfg->domain)) - per_cpu(vector_irq, cpu)[vector] = VECTOR_UNDEFINED; - } - raw_spin_unlock(&vector_lock); -} - static struct irq_chip ioapic_chip; #ifdef CONFIG_X86_32 @@ -1655,7 +1405,7 @@ void ioapic_zap_locks(void) raw_spin_lock_init(&ioapic_lock); } -__apicdebuginit(void) print_IO_APIC(int ioapic_idx) +static void __init print_IO_APIC(int ioapic_idx) { union IO_APIC_reg_00 reg_00; union IO_APIC_reg_01 reg_01; @@ -1712,7 +1462,7 @@ __apicdebuginit(void) print_IO_APIC(int ioapic_idx) x86_io_apic_ops.print_entries(ioapic_idx, reg_01.bits.entries); } -__apicdebuginit(void) print_IO_APICs(void) +void __init print_IO_APICs(void) { int ioapic_idx; struct irq_cfg *cfg; @@ -1756,205 +1506,6 @@ __apicdebuginit(void) print_IO_APICs(void) printk(KERN_INFO ".................................... done.\n"); } -__apicdebuginit(void) print_APIC_field(int base) -{ - int i; - - printk(KERN_DEBUG); - - for (i = 0; i < 8; i++) - pr_cont("%08x", apic_read(base + i*0x10)); - - pr_cont("\n"); -} - -__apicdebuginit(void) print_local_APIC(void *dummy) -{ - unsigned int i, v, ver, maxlvt; - u64 icr; - - printk(KERN_DEBUG "printing local APIC contents on CPU#%d/%d:\n", - smp_processor_id(), hard_smp_processor_id()); - v = apic_read(APIC_ID); - printk(KERN_INFO "... APIC ID: %08x (%01x)\n", v, read_apic_id()); - v = apic_read(APIC_LVR); - printk(KERN_INFO "... APIC VERSION: %08x\n", v); - ver = GET_APIC_VERSION(v); - maxlvt = lapic_get_maxlvt(); - - v = apic_read(APIC_TASKPRI); - printk(KERN_DEBUG "... APIC TASKPRI: %08x (%02x)\n", v, v & APIC_TPRI_MASK); - - if (APIC_INTEGRATED(ver)) { /* !82489DX */ - if (!APIC_XAPIC(ver)) { - v = apic_read(APIC_ARBPRI); - printk(KERN_DEBUG "... APIC ARBPRI: %08x (%02x)\n", v, - v & APIC_ARBPRI_MASK); - } - v = apic_read(APIC_PROCPRI); - printk(KERN_DEBUG "... APIC PROCPRI: %08x\n", v); - } - - /* - * Remote read supported only in the 82489DX and local APIC for - * Pentium processors. - */ - if (!APIC_INTEGRATED(ver) || maxlvt == 3) { - v = apic_read(APIC_RRR); - printk(KERN_DEBUG "... APIC RRR: %08x\n", v); - } - - v = apic_read(APIC_LDR); - printk(KERN_DEBUG "... APIC LDR: %08x\n", v); - if (!x2apic_enabled()) { - v = apic_read(APIC_DFR); - printk(KERN_DEBUG "... APIC DFR: %08x\n", v); - } - v = apic_read(APIC_SPIV); - printk(KERN_DEBUG "... APIC SPIV: %08x\n", v); - - printk(KERN_DEBUG "... APIC ISR field:\n"); - print_APIC_field(APIC_ISR); - printk(KERN_DEBUG "... APIC TMR field:\n"); - print_APIC_field(APIC_TMR); - printk(KERN_DEBUG "... APIC IRR field:\n"); - print_APIC_field(APIC_IRR); - - if (APIC_INTEGRATED(ver)) { /* !82489DX */ - if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */ - apic_write(APIC_ESR, 0); - - v = apic_read(APIC_ESR); - printk(KERN_DEBUG "... APIC ESR: %08x\n", v); - } - - icr = apic_icr_read(); - printk(KERN_DEBUG "... APIC ICR: %08x\n", (u32)icr); - printk(KERN_DEBUG "... APIC ICR2: %08x\n", (u32)(icr >> 32)); - - v = apic_read(APIC_LVTT); - printk(KERN_DEBUG "... APIC LVTT: %08x\n", v); - - if (maxlvt > 3) { /* PC is LVT#4. */ - v = apic_read(APIC_LVTPC); - printk(KERN_DEBUG "... APIC LVTPC: %08x\n", v); - } - v = apic_read(APIC_LVT0); - printk(KERN_DEBUG "... APIC LVT0: %08x\n", v); - v = apic_read(APIC_LVT1); - printk(KERN_DEBUG "... APIC LVT1: %08x\n", v); - - if (maxlvt > 2) { /* ERR is LVT#3. */ - v = apic_read(APIC_LVTERR); - printk(KERN_DEBUG "... APIC LVTERR: %08x\n", v); - } - - v = apic_read(APIC_TMICT); - printk(KERN_DEBUG "... APIC TMICT: %08x\n", v); - v = apic_read(APIC_TMCCT); - printk(KERN_DEBUG "... APIC TMCCT: %08x\n", v); - v = apic_read(APIC_TDCR); - printk(KERN_DEBUG "... APIC TDCR: %08x\n", v); - - if (boot_cpu_has(X86_FEATURE_EXTAPIC)) { - v = apic_read(APIC_EFEAT); - maxlvt = (v >> 16) & 0xff; - printk(KERN_DEBUG "... APIC EFEAT: %08x\n", v); - v = apic_read(APIC_ECTRL); - printk(KERN_DEBUG "... APIC ECTRL: %08x\n", v); - for (i = 0; i < maxlvt; i++) { - v = apic_read(APIC_EILVTn(i)); - printk(KERN_DEBUG "... APIC EILVT%d: %08x\n", i, v); - } - } - pr_cont("\n"); -} - -__apicdebuginit(void) print_local_APICs(int maxcpu) -{ - int cpu; - - if (!maxcpu) - return; - - preempt_disable(); - for_each_online_cpu(cpu) { - if (cpu >= maxcpu) - break; - smp_call_function_single(cpu, print_local_APIC, NULL, 1); - } - preempt_enable(); -} - -__apicdebuginit(void) print_PIC(void) -{ - unsigned int v; - unsigned long flags; - - if (!nr_legacy_irqs()) - return; - - printk(KERN_DEBUG "\nprinting PIC contents\n"); - - raw_spin_lock_irqsave(&i8259A_lock, flags); - - v = inb(0xa1) << 8 | inb(0x21); - printk(KERN_DEBUG "... PIC IMR: %04x\n", v); - - v = inb(0xa0) << 8 | inb(0x20); - printk(KERN_DEBUG "... PIC IRR: %04x\n", v); - - outb(0x0b,0xa0); - outb(0x0b,0x20); - v = inb(0xa0) << 8 | inb(0x20); - outb(0x0a,0xa0); - outb(0x0a,0x20); - - raw_spin_unlock_irqrestore(&i8259A_lock, flags); - - printk(KERN_DEBUG "... PIC ISR: %04x\n", v); - - v = inb(0x4d1) << 8 | inb(0x4d0); - printk(KERN_DEBUG "... PIC ELCR: %04x\n", v); -} - -static int __initdata show_lapic = 1; -static __init int setup_show_lapic(char *arg) -{ - int num = -1; - - if (strcmp(arg, "all") == 0) { - show_lapic = CONFIG_NR_CPUS; - } else { - get_option(&arg, &num); - if (num >= 0) - show_lapic = num; - } - - return 1; -} -__setup("show_lapic=", setup_show_lapic); - -__apicdebuginit(int) print_ICs(void) -{ - if (apic_verbosity == APIC_QUIET) - return 0; - - print_PIC(); - - /* don't print out if apic is not there */ - if (!cpu_has_apic && !apic_from_smp_config()) - return 0; - - print_local_APICs(show_lapic); - print_IO_APICs(); - - return 0; -} - -late_initcall(print_ICs); - - /* Where if anywhere is the i8259 connect in external int mode */ static struct { int pin, apic; } ioapic_i8259 = { -1, -1 }; @@ -2263,20 +1814,6 @@ static unsigned int startup_ioapic_irq(struct irq_data *data) return was_pending; } -static int apic_retrigger_irq(struct irq_data *data) -{ - struct irq_cfg *cfg = data->chip_data; - unsigned long flags; - int cpu; - - raw_spin_lock_irqsave(&vector_lock, flags); - cpu = cpumask_first_and(cfg->domain, cpu_online_mask); - apic->send_IPI_mask(cpumask_of(cpu), cfg->vector); - raw_spin_unlock_irqrestore(&vector_lock, flags); - - return 1; -} - /* * Level and edge triggered IO-APIC interrupts need different handling, * so we use two separate IRQ descriptors. Edge triggered IRQs can be @@ -2286,113 +1823,6 @@ static int apic_retrigger_irq(struct irq_data *data) * races. */ -#ifdef CONFIG_SMP -void send_cleanup_vector(struct irq_cfg *cfg) -{ - cpumask_var_t cleanup_mask; - - if (unlikely(!alloc_cpumask_var(&cleanup_mask, GFP_ATOMIC))) { - unsigned int i; - for_each_cpu_and(i, cfg->old_domain, cpu_online_mask) - apic->send_IPI_mask(cpumask_of(i), IRQ_MOVE_CLEANUP_VECTOR); - } else { - cpumask_and(cleanup_mask, cfg->old_domain, cpu_online_mask); - apic->send_IPI_mask(cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR); - free_cpumask_var(cleanup_mask); - } - cfg->move_in_progress = 0; -} - -asmlinkage __visible void smp_irq_move_cleanup_interrupt(void) -{ - unsigned vector, me; - - ack_APIC_irq(); - irq_enter(); - exit_idle(); - - me = smp_processor_id(); - for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) { - int irq; - unsigned int irr; - struct irq_desc *desc; - struct irq_cfg *cfg; - irq = __this_cpu_read(vector_irq[vector]); - - if (irq <= VECTOR_UNDEFINED) - continue; - - desc = irq_to_desc(irq); - if (!desc) - continue; - - cfg = irq_cfg(irq); - if (!cfg) - continue; - - raw_spin_lock(&desc->lock); - - /* - * Check if the irq migration is in progress. If so, we - * haven't received the cleanup request yet for this irq. - */ - if (cfg->move_in_progress) - goto unlock; - - if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain)) - goto unlock; - - irr = apic_read(APIC_IRR + (vector / 32 * 0x10)); - /* - * Check if the vector that needs to be cleanedup is - * registered at the cpu's IRR. If so, then this is not - * the best time to clean it up. Lets clean it up in the - * next attempt by sending another IRQ_MOVE_CLEANUP_VECTOR - * to myself. - */ - if (irr & (1 << (vector % 32))) { - apic->send_IPI_self(IRQ_MOVE_CLEANUP_VECTOR); - goto unlock; - } - __this_cpu_write(vector_irq[vector], VECTOR_UNDEFINED); -unlock: - raw_spin_unlock(&desc->lock); - } - - irq_exit(); -} - -static void __irq_complete_move(struct irq_cfg *cfg, unsigned vector) -{ - unsigned me; - - if (likely(!cfg->move_in_progress)) - return; - - me = smp_processor_id(); - - if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain)) - send_cleanup_vector(cfg); -} - -static void irq_complete_move(struct irq_cfg *cfg) -{ - __irq_complete_move(cfg, ~get_irq_regs()->orig_ax); -} - -void irq_force_complete_move(int irq) -{ - struct irq_cfg *cfg = irq_cfg(irq); - - if (!cfg) - return; - - __irq_complete_move(cfg, cfg->vector); -} -#else -static inline void irq_complete_move(struct irq_cfg *cfg) { } -#endif - static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, struct irq_cfg *cfg) { int apic, pin; @@ -2413,41 +1843,6 @@ static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, struct irq } } -/* - * Either sets data->affinity to a valid value, and returns - * ->cpu_mask_to_apicid of that in dest_id, or returns -1 and - * leaves data->affinity untouched. - */ -int apic_set_affinity(struct irq_data *data, const struct cpumask *mask, - unsigned int *dest_id) -{ - struct irq_cfg *cfg = data->chip_data; - unsigned int irq = data->irq; - int err; - - if (!config_enabled(CONFIG_SMP)) - return -EPERM; - - if (!cpumask_intersects(mask, cpu_online_mask)) - return -EINVAL; - - err = assign_irq_vector(irq, cfg, mask); - if (err) - return err; - - err = apic->cpu_mask_to_apicid_and(mask, cfg->domain, dest_id); - if (err) { - if (assign_irq_vector(irq, cfg, data->affinity)) - pr_err("Failed to recover vector for irq %d\n", irq); - return err; - } - - cpumask_copy(data->affinity, mask); - - return 0; -} - - int native_ioapic_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) @@ -2471,13 +1866,6 @@ int native_ioapic_set_affinity(struct irq_data *data, return ret; } -static void apic_ack_edge(struct irq_data *data) -{ - irq_complete_move(data->chip_data); - irq_move_irq(data); - ack_APIC_irq(); -} - atomic_t irq_mis_count; #ifdef CONFIG_GENERIC_PENDING_IRQ @@ -3067,39 +2455,6 @@ static int __init ioapic_init_ops(void) device_initcall(ioapic_init_ops); -/* - * Dynamic irq allocate and deallocation. Should be replaced by irq domains! - */ -int arch_setup_hwirq(unsigned int irq, int node) -{ - struct irq_cfg *cfg; - unsigned long flags; - int ret; - - cfg = alloc_irq_cfg(irq, node); - if (!cfg) - return -ENOMEM; - - raw_spin_lock_irqsave(&vector_lock, flags); - ret = __assign_irq_vector(irq, cfg, apic->target_cpus()); - raw_spin_unlock_irqrestore(&vector_lock, flags); - - if (!ret) - irq_set_chip_data(irq, cfg); - else - free_irq_cfg(irq, cfg); - return ret; -} - -void arch_teardown_hwirq(unsigned int irq) -{ - struct irq_cfg *cfg = irq_cfg(irq); - - free_remapped_irq(irq); - clear_irq_vector(irq, cfg); - free_irq_cfg(irq, cfg); -} - /* * MSI message composition */ diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c new file mode 100644 index 000000000000..9ba9bd477051 --- /dev/null +++ b/arch/x86/kernel/apic/vector.c @@ -0,0 +1,694 @@ +/* + * Local APIC related interfaces to support IOAPIC, MSI, HT_IRQ etc. + * + * Copyright (C) 1997, 1998, 1999, 2000, 2009 Ingo Molnar, Hajnalka Szabo + * Moved from arch/x86/kernel/apic/io_apic.c. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static DEFINE_RAW_SPINLOCK(vector_lock); + +void lock_vector_lock(void) +{ + /* Used to the online set of cpus does not change + * during assign_irq_vector. + */ + raw_spin_lock(&vector_lock); +} + +void unlock_vector_lock(void) +{ + raw_spin_unlock(&vector_lock); +} + +struct irq_cfg *irq_cfg(unsigned int irq) +{ + return irq_get_chip_data(irq); +} + +struct irq_cfg *irqd_cfg(struct irq_data *irq_data) +{ + return irq_data->chip_data; +} + +static struct irq_cfg *alloc_irq_cfg(unsigned int irq, int node) +{ + struct irq_cfg *cfg; + + cfg = kzalloc_node(sizeof(*cfg), GFP_KERNEL, node); + if (!cfg) + return NULL; + if (!zalloc_cpumask_var_node(&cfg->domain, GFP_KERNEL, node)) + goto out_cfg; + if (!zalloc_cpumask_var_node(&cfg->old_domain, GFP_KERNEL, node)) + goto out_domain; +#ifdef CONFIG_X86_IO_APIC + INIT_LIST_HEAD(&cfg->irq_2_pin); +#endif + return cfg; +out_domain: + free_cpumask_var(cfg->domain); +out_cfg: + kfree(cfg); + return NULL; +} + +struct irq_cfg *alloc_irq_and_cfg_at(unsigned int at, int node) +{ + int res = irq_alloc_desc_at(at, node); + struct irq_cfg *cfg; + + if (res < 0) { + if (res != -EEXIST) + return NULL; + cfg = irq_cfg(at); + if (cfg) + return cfg; + } + + cfg = alloc_irq_cfg(at, node); + if (cfg) + irq_set_chip_data(at, cfg); + else + irq_free_desc(at); + return cfg; +} + +static void free_irq_cfg(unsigned int at, struct irq_cfg *cfg) +{ + if (!cfg) + return; + irq_set_chip_data(at, NULL); + free_cpumask_var(cfg->domain); + free_cpumask_var(cfg->old_domain); + kfree(cfg); +} + +static int +__assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask) +{ + /* + * NOTE! The local APIC isn't very good at handling + * multiple interrupts at the same interrupt level. + * As the interrupt level is determined by taking the + * vector number and shifting that right by 4, we + * want to spread these out a bit so that they don't + * all fall in the same interrupt level. + * + * Also, we've got to be careful not to trash gate + * 0x80, because int 0x80 is hm, kind of importantish. ;) + */ + static int current_vector = FIRST_EXTERNAL_VECTOR + VECTOR_OFFSET_START; + static int current_offset = VECTOR_OFFSET_START % 16; + int cpu, err; + cpumask_var_t tmp_mask; + + if (cfg->move_in_progress) + return -EBUSY; + + if (!alloc_cpumask_var(&tmp_mask, GFP_ATOMIC)) + return -ENOMEM; + + /* Only try and allocate irqs on cpus that are present */ + err = -ENOSPC; + cpumask_clear(cfg->old_domain); + cpu = cpumask_first_and(mask, cpu_online_mask); + while (cpu < nr_cpu_ids) { + int new_cpu, vector, offset; + + apic->vector_allocation_domain(cpu, tmp_mask, mask); + + if (cpumask_subset(tmp_mask, cfg->domain)) { + err = 0; + if (cpumask_equal(tmp_mask, cfg->domain)) + break; + /* + * New cpumask using the vector is a proper subset of + * the current in use mask. So cleanup the vector + * allocation for the members that are not used anymore. + */ + cpumask_andnot(cfg->old_domain, cfg->domain, tmp_mask); + cfg->move_in_progress = + cpumask_intersects(cfg->old_domain, cpu_online_mask); + cpumask_and(cfg->domain, cfg->domain, tmp_mask); + break; + } + + vector = current_vector; + offset = current_offset; +next: + vector += 16; + if (vector >= first_system_vector) { + offset = (offset + 1) % 16; + vector = FIRST_EXTERNAL_VECTOR + offset; + } + + if (unlikely(current_vector == vector)) { + cpumask_or(cfg->old_domain, cfg->old_domain, tmp_mask); + cpumask_andnot(tmp_mask, mask, cfg->old_domain); + cpu = cpumask_first_and(tmp_mask, cpu_online_mask); + continue; + } + + if (test_bit(vector, used_vectors)) + goto next; + + for_each_cpu_and(new_cpu, tmp_mask, cpu_online_mask) { + if (per_cpu(vector_irq, new_cpu)[vector] > + VECTOR_UNDEFINED) + goto next; + } + /* Found one! */ + current_vector = vector; + current_offset = offset; + if (cfg->vector) { + cpumask_copy(cfg->old_domain, cfg->domain); + cfg->move_in_progress = + cpumask_intersects(cfg->old_domain, cpu_online_mask); + } + for_each_cpu_and(new_cpu, tmp_mask, cpu_online_mask) + per_cpu(vector_irq, new_cpu)[vector] = irq; + cfg->vector = vector; + cpumask_copy(cfg->domain, tmp_mask); + err = 0; + break; + } + free_cpumask_var(tmp_mask); + + return err; +} + +int assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask) +{ + int err; + unsigned long flags; + + raw_spin_lock_irqsave(&vector_lock, flags); + err = __assign_irq_vector(irq, cfg, mask); + raw_spin_unlock_irqrestore(&vector_lock, flags); + return err; +} + +void clear_irq_vector(int irq, struct irq_cfg *cfg) +{ + int cpu, vector; + unsigned long flags; + + raw_spin_lock_irqsave(&vector_lock, flags); + BUG_ON(!cfg->vector); + + vector = cfg->vector; + for_each_cpu_and(cpu, cfg->domain, cpu_online_mask) + per_cpu(vector_irq, cpu)[vector] = VECTOR_UNDEFINED; + + cfg->vector = 0; + cpumask_clear(cfg->domain); + + if (likely(!cfg->move_in_progress)) { + raw_spin_unlock_irqrestore(&vector_lock, flags); + return; + } + + for_each_cpu_and(cpu, cfg->old_domain, cpu_online_mask) { + for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; + vector++) { + if (per_cpu(vector_irq, cpu)[vector] != irq) + continue; + per_cpu(vector_irq, cpu)[vector] = VECTOR_UNDEFINED; + break; + } + } + cfg->move_in_progress = 0; + raw_spin_unlock_irqrestore(&vector_lock, flags); +} + +static void __setup_vector_irq(int cpu) +{ + /* Initialize vector_irq on a new cpu */ + int irq, vector; + struct irq_cfg *cfg; + + /* + * vector_lock will make sure that we don't run into irq vector + * assignments that might be happening on another cpu in parallel, + * while we setup our initial vector to irq mappings. + */ + raw_spin_lock(&vector_lock); + /* Mark the inuse vectors */ + for_each_active_irq(irq) { + cfg = irq_cfg(irq); + if (!cfg) + continue; + + if (!cpumask_test_cpu(cpu, cfg->domain)) + continue; + vector = cfg->vector; + per_cpu(vector_irq, cpu)[vector] = irq; + } + /* Mark the free vectors */ + for (vector = 0; vector < NR_VECTORS; ++vector) { + irq = per_cpu(vector_irq, cpu)[vector]; + if (irq <= VECTOR_UNDEFINED) + continue; + + cfg = irq_cfg(irq); + if (!cpumask_test_cpu(cpu, cfg->domain)) + per_cpu(vector_irq, cpu)[vector] = VECTOR_UNDEFINED; + } + raw_spin_unlock(&vector_lock); +} + +/* + * Setup the vector to irq mappings. + */ +void setup_vector_irq(int cpu) +{ + int irq; + + /* + * On most of the platforms, legacy PIC delivers the interrupts on the + * boot cpu. But there are certain platforms where PIC interrupts are + * delivered to multiple cpu's. If the legacy IRQ is handled by the + * legacy PIC, for the new cpu that is coming online, setup the static + * legacy vector to irq mapping: + */ + for (irq = 0; irq < nr_legacy_irqs(); irq++) + per_cpu(vector_irq, cpu)[IRQ0_VECTOR + irq] = irq; + + __setup_vector_irq(cpu); +} + +int apic_retrigger_irq(struct irq_data *data) +{ + struct irq_cfg *cfg = data->chip_data; + unsigned long flags; + int cpu; + + raw_spin_lock_irqsave(&vector_lock, flags); + cpu = cpumask_first_and(cfg->domain, cpu_online_mask); + apic->send_IPI_mask(cpumask_of(cpu), cfg->vector); + raw_spin_unlock_irqrestore(&vector_lock, flags); + + return 1; +} + +void apic_ack_edge(struct irq_data *data) +{ + irq_complete_move(data->chip_data); + irq_move_irq(data); + ack_APIC_irq(); +} + +/* + * Either sets data->affinity to a valid value, and returns + * ->cpu_mask_to_apicid of that in dest_id, or returns -1 and + * leaves data->affinity untouched. + */ +int apic_set_affinity(struct irq_data *data, const struct cpumask *mask, + unsigned int *dest_id) +{ + struct irq_cfg *cfg = data->chip_data; + unsigned int irq = data->irq; + int err; + + if (!config_enabled(CONFIG_SMP)) + return -EPERM; + + if (!cpumask_intersects(mask, cpu_online_mask)) + return -EINVAL; + + err = assign_irq_vector(irq, cfg, mask); + if (err) + return err; + + err = apic->cpu_mask_to_apicid_and(mask, cfg->domain, dest_id); + if (err) { + if (assign_irq_vector(irq, cfg, data->affinity)) + pr_err("Failed to recover vector for irq %d\n", irq); + return err; + } + + cpumask_copy(data->affinity, mask); + + return 0; +} + +#ifdef CONFIG_SMP +void send_cleanup_vector(struct irq_cfg *cfg) +{ + cpumask_var_t cleanup_mask; + + if (unlikely(!alloc_cpumask_var(&cleanup_mask, GFP_ATOMIC))) { + unsigned int i; + + for_each_cpu_and(i, cfg->old_domain, cpu_online_mask) + apic->send_IPI_mask(cpumask_of(i), + IRQ_MOVE_CLEANUP_VECTOR); + } else { + cpumask_and(cleanup_mask, cfg->old_domain, cpu_online_mask); + apic->send_IPI_mask(cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR); + free_cpumask_var(cleanup_mask); + } + cfg->move_in_progress = 0; +} + +asmlinkage __visible void smp_irq_move_cleanup_interrupt(void) +{ + unsigned vector, me; + + ack_APIC_irq(); + irq_enter(); + exit_idle(); + + me = smp_processor_id(); + for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) { + int irq; + unsigned int irr; + struct irq_desc *desc; + struct irq_cfg *cfg; + + irq = __this_cpu_read(vector_irq[vector]); + + if (irq <= VECTOR_UNDEFINED) + continue; + + desc = irq_to_desc(irq); + if (!desc) + continue; + + cfg = irq_cfg(irq); + if (!cfg) + continue; + + raw_spin_lock(&desc->lock); + + /* + * Check if the irq migration is in progress. If so, we + * haven't received the cleanup request yet for this irq. + */ + if (cfg->move_in_progress) + goto unlock; + + if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain)) + goto unlock; + + irr = apic_read(APIC_IRR + (vector / 32 * 0x10)); + /* + * Check if the vector that needs to be cleanedup is + * registered at the cpu's IRR. If so, then this is not + * the best time to clean it up. Lets clean it up in the + * next attempt by sending another IRQ_MOVE_CLEANUP_VECTOR + * to myself. + */ + if (irr & (1 << (vector % 32))) { + apic->send_IPI_self(IRQ_MOVE_CLEANUP_VECTOR); + goto unlock; + } + __this_cpu_write(vector_irq[vector], VECTOR_UNDEFINED); +unlock: + raw_spin_unlock(&desc->lock); + } + + irq_exit(); +} + +static void __irq_complete_move(struct irq_cfg *cfg, unsigned vector) +{ + unsigned me; + + if (likely(!cfg->move_in_progress)) + return; + + me = smp_processor_id(); + + if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain)) + send_cleanup_vector(cfg); +} + +void irq_complete_move(struct irq_cfg *cfg) +{ + __irq_complete_move(cfg, ~get_irq_regs()->orig_ax); +} + +void irq_force_complete_move(int irq) +{ + struct irq_cfg *cfg = irq_cfg(irq); + + if (!cfg) + return; + + __irq_complete_move(cfg, cfg->vector); +} +#else +void irq_complete_move(struct irq_cfg *cfg) { } +#endif + +/* + * Dynamic irq allocate and deallocation. Should be replaced by irq domains! + */ +int arch_setup_hwirq(unsigned int irq, int node) +{ + struct irq_cfg *cfg; + unsigned long flags; + int ret; + + cfg = alloc_irq_cfg(irq, node); + if (!cfg) + return -ENOMEM; + + raw_spin_lock_irqsave(&vector_lock, flags); + ret = __assign_irq_vector(irq, cfg, apic->target_cpus()); + raw_spin_unlock_irqrestore(&vector_lock, flags); + + if (!ret) + irq_set_chip_data(irq, cfg); + else + free_irq_cfg(irq, cfg); + return ret; +} + +void arch_teardown_hwirq(unsigned int irq) +{ + struct irq_cfg *cfg = irq_cfg(irq); + + free_remapped_irq(irq); + clear_irq_vector(irq, cfg); + free_irq_cfg(irq, cfg); +} + +static void __init print_APIC_field(int base) +{ + int i; + + printk(KERN_DEBUG); + + for (i = 0; i < 8; i++) + pr_cont("%08x", apic_read(base + i*0x10)); + + pr_cont("\n"); +} + +static void __init print_local_APIC(void *dummy) +{ + unsigned int i, v, ver, maxlvt; + u64 icr; + + printk(KERN_DEBUG "printing local APIC contents on CPU#%d/%d:\n", + smp_processor_id(), hard_smp_processor_id()); + v = apic_read(APIC_ID); + printk(KERN_INFO "... APIC ID: %08x (%01x)\n", v, read_apic_id()); + v = apic_read(APIC_LVR); + printk(KERN_INFO "... APIC VERSION: %08x\n", v); + ver = GET_APIC_VERSION(v); + maxlvt = lapic_get_maxlvt(); + + v = apic_read(APIC_TASKPRI); + printk(KERN_DEBUG "... APIC TASKPRI: %08x (%02x)\n", + v, v & APIC_TPRI_MASK); + + /* !82489DX */ + if (APIC_INTEGRATED(ver)) { + if (!APIC_XAPIC(ver)) { + v = apic_read(APIC_ARBPRI); + printk(KERN_DEBUG "... APIC ARBPRI: %08x (%02x)\n", v, + v & APIC_ARBPRI_MASK); + } + v = apic_read(APIC_PROCPRI); + printk(KERN_DEBUG "... APIC PROCPRI: %08x\n", v); + } + + /* + * Remote read supported only in the 82489DX and local APIC for + * Pentium processors. + */ + if (!APIC_INTEGRATED(ver) || maxlvt == 3) { + v = apic_read(APIC_RRR); + printk(KERN_DEBUG "... APIC RRR: %08x\n", v); + } + + v = apic_read(APIC_LDR); + printk(KERN_DEBUG "... APIC LDR: %08x\n", v); + if (!x2apic_enabled()) { + v = apic_read(APIC_DFR); + printk(KERN_DEBUG "... APIC DFR: %08x\n", v); + } + v = apic_read(APIC_SPIV); + printk(KERN_DEBUG "... APIC SPIV: %08x\n", v); + + printk(KERN_DEBUG "... APIC ISR field:\n"); + print_APIC_field(APIC_ISR); + printk(KERN_DEBUG "... APIC TMR field:\n"); + print_APIC_field(APIC_TMR); + printk(KERN_DEBUG "... APIC IRR field:\n"); + print_APIC_field(APIC_IRR); + + /* !82489DX */ + if (APIC_INTEGRATED(ver)) { + /* Due to the Pentium erratum 3AP. */ + if (maxlvt > 3) + apic_write(APIC_ESR, 0); + + v = apic_read(APIC_ESR); + printk(KERN_DEBUG "... APIC ESR: %08x\n", v); + } + + icr = apic_icr_read(); + printk(KERN_DEBUG "... APIC ICR: %08x\n", (u32)icr); + printk(KERN_DEBUG "... APIC ICR2: %08x\n", (u32)(icr >> 32)); + + v = apic_read(APIC_LVTT); + printk(KERN_DEBUG "... APIC LVTT: %08x\n", v); + + if (maxlvt > 3) { + /* PC is LVT#4. */ + v = apic_read(APIC_LVTPC); + printk(KERN_DEBUG "... APIC LVTPC: %08x\n", v); + } + v = apic_read(APIC_LVT0); + printk(KERN_DEBUG "... APIC LVT0: %08x\n", v); + v = apic_read(APIC_LVT1); + printk(KERN_DEBUG "... APIC LVT1: %08x\n", v); + + if (maxlvt > 2) { + /* ERR is LVT#3. */ + v = apic_read(APIC_LVTERR); + printk(KERN_DEBUG "... APIC LVTERR: %08x\n", v); + } + + v = apic_read(APIC_TMICT); + printk(KERN_DEBUG "... APIC TMICT: %08x\n", v); + v = apic_read(APIC_TMCCT); + printk(KERN_DEBUG "... APIC TMCCT: %08x\n", v); + v = apic_read(APIC_TDCR); + printk(KERN_DEBUG "... APIC TDCR: %08x\n", v); + + if (boot_cpu_has(X86_FEATURE_EXTAPIC)) { + v = apic_read(APIC_EFEAT); + maxlvt = (v >> 16) & 0xff; + printk(KERN_DEBUG "... APIC EFEAT: %08x\n", v); + v = apic_read(APIC_ECTRL); + printk(KERN_DEBUG "... APIC ECTRL: %08x\n", v); + for (i = 0; i < maxlvt; i++) { + v = apic_read(APIC_EILVTn(i)); + printk(KERN_DEBUG "... APIC EILVT%d: %08x\n", i, v); + } + } + pr_cont("\n"); +} + +static void __init print_local_APICs(int maxcpu) +{ + int cpu; + + if (!maxcpu) + return; + + preempt_disable(); + for_each_online_cpu(cpu) { + if (cpu >= maxcpu) + break; + smp_call_function_single(cpu, print_local_APIC, NULL, 1); + } + preempt_enable(); +} + +static void __init print_PIC(void) +{ + unsigned int v; + unsigned long flags; + + if (!nr_legacy_irqs()) + return; + + printk(KERN_DEBUG "\nprinting PIC contents\n"); + + raw_spin_lock_irqsave(&i8259A_lock, flags); + + v = inb(0xa1) << 8 | inb(0x21); + printk(KERN_DEBUG "... PIC IMR: %04x\n", v); + + v = inb(0xa0) << 8 | inb(0x20); + printk(KERN_DEBUG "... PIC IRR: %04x\n", v); + + outb(0x0b, 0xa0); + outb(0x0b, 0x20); + v = inb(0xa0) << 8 | inb(0x20); + outb(0x0a, 0xa0); + outb(0x0a, 0x20); + + raw_spin_unlock_irqrestore(&i8259A_lock, flags); + + printk(KERN_DEBUG "... PIC ISR: %04x\n", v); + + v = inb(0x4d1) << 8 | inb(0x4d0); + printk(KERN_DEBUG "... PIC ELCR: %04x\n", v); +} + +static int show_lapic __initdata = 1; +static __init int setup_show_lapic(char *arg) +{ + int num = -1; + + if (strcmp(arg, "all") == 0) { + show_lapic = CONFIG_NR_CPUS; + } else { + get_option(&arg, &num); + if (num >= 0) + show_lapic = num; + } + + return 1; +} +__setup("show_lapic=", setup_show_lapic); + +static int __init print_ICs(void) +{ + if (apic_verbosity == APIC_QUIET) + return 0; + + print_PIC(); + + /* don't print out if apic is not there */ + if (!cpu_has_apic && !apic_from_smp_config()) + return 0; + + print_local_APICs(show_lapic); + print_IO_APICs(); + + return 0; +} + +late_initcall(print_ICs); diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c index fa893087fb51..70e181ea1eac 100644 --- a/arch/x86/kernel/irqinit.c +++ b/arch/x86/kernel/irqinit.c @@ -99,28 +99,6 @@ void __init init_IRQ(void) x86_init.irqs.intr_init(); } -/* - * Setup the vector to irq mappings. - */ -void setup_vector_irq(int cpu) -{ -#ifndef CONFIG_X86_IO_APIC - int irq; - - /* - * On most of the platforms, legacy PIC delivers the interrupts on the - * boot cpu. But there are certain platforms where PIC interrupts are - * delivered to multiple cpu's. If the legacy IRQ is handled by the - * legacy PIC, for the new cpu that is coming online, setup the static - * legacy vector to irq mapping: - */ - for (irq = 0; irq < nr_legacy_irqs(); irq++) - per_cpu(vector_irq, cpu)[IRQ0_VECTOR + irq] = irq; -#endif - - __setup_vector_irq(cpu); -} - static void __init smp_intr_init(void) { #ifdef CONFIG_SMP