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23359a88e7
move_cleanup_count for each irq in irq_cfg is keeping track of the total number of cpus that need to free the corresponding vectors associated with the irq which has now been migrated to new destination. As long as this move_cleanup_count is non-zero (i.e., as long as we have n't freed the vector allocations on the old destinations) we were preventing the irq's further migration. This cleanup count is unnecessary and it is enough to not allow the irq migration till we send the cleanup vector to the previous irq destination, for which we already have irq_cfg's move_in_progress. All we need to make sure is that we free the vector at the old desintation but we don't need to wait till that gets freed. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Acked-by: Gary Hade <garyhade@us.ibm.com> Cc: Eric W. Biederman <ebiederm@xmission.com> LKML-Reference: <20091026230001.752968906@sbs-t61.sc.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
156 lines
4.3 KiB
C
156 lines
4.3 KiB
C
#ifndef _ASM_X86_HW_IRQ_H
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#define _ASM_X86_HW_IRQ_H
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/*
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* (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
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*
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* moved some of the old arch/i386/kernel/irq.h to here. VY
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*
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* IRQ/IPI changes taken from work by Thomas Radke
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* <tomsoft@informatik.tu-chemnitz.de>
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*
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* hacked by Andi Kleen for x86-64.
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* unified by tglx
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*/
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#include <asm/irq_vectors.h>
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#ifndef __ASSEMBLY__
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#include <linux/percpu.h>
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#include <linux/profile.h>
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#include <linux/smp.h>
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#include <asm/atomic.h>
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#include <asm/irq.h>
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#include <asm/sections.h>
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/* Interrupt handlers registered during init_IRQ */
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extern void apic_timer_interrupt(void);
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extern void generic_interrupt(void);
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extern void error_interrupt(void);
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extern void perf_pending_interrupt(void);
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extern void spurious_interrupt(void);
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extern void thermal_interrupt(void);
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extern void reschedule_interrupt(void);
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extern void mce_self_interrupt(void);
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extern void invalidate_interrupt(void);
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extern void invalidate_interrupt0(void);
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extern void invalidate_interrupt1(void);
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extern void invalidate_interrupt2(void);
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extern void invalidate_interrupt3(void);
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extern void invalidate_interrupt4(void);
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extern void invalidate_interrupt5(void);
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extern void invalidate_interrupt6(void);
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extern void invalidate_interrupt7(void);
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extern void irq_move_cleanup_interrupt(void);
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extern void reboot_interrupt(void);
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extern void threshold_interrupt(void);
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extern void call_function_interrupt(void);
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extern void call_function_single_interrupt(void);
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/* PIC specific functions */
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extern void disable_8259A_irq(unsigned int irq);
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extern void enable_8259A_irq(unsigned int irq);
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extern int i8259A_irq_pending(unsigned int irq);
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extern void make_8259A_irq(unsigned int irq);
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extern void init_8259A(int aeoi);
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/* IOAPIC */
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#define IO_APIC_IRQ(x) (((x) >= NR_IRQS_LEGACY) || ((1<<(x)) & io_apic_irqs))
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extern unsigned long io_apic_irqs;
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extern void init_VISWS_APIC_irqs(void);
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extern void setup_IO_APIC(void);
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extern void disable_IO_APIC(void);
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struct io_apic_irq_attr {
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int ioapic;
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int ioapic_pin;
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int trigger;
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int polarity;
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};
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static inline void set_io_apic_irq_attr(struct io_apic_irq_attr *irq_attr,
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int ioapic, int ioapic_pin,
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int trigger, int polarity)
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{
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irq_attr->ioapic = ioapic;
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irq_attr->ioapic_pin = ioapic_pin;
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irq_attr->trigger = trigger;
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irq_attr->polarity = polarity;
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}
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/*
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* This is performance-critical, we want to do it O(1)
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*
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* Most irqs are mapped 1:1 with pins.
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*/
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struct irq_cfg {
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struct irq_pin_list *irq_2_pin;
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cpumask_var_t domain;
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cpumask_var_t old_domain;
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u8 vector;
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u8 move_in_progress : 1;
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};
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extern struct irq_cfg *irq_cfg(unsigned int);
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extern int assign_irq_vector(int, struct irq_cfg *, const struct cpumask *);
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extern void send_cleanup_vector(struct irq_cfg *);
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struct irq_desc;
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extern unsigned int set_desc_affinity(struct irq_desc *, const struct cpumask *);
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extern int IO_APIC_get_PCI_irq_vector(int bus, int devfn, int pin, struct io_apic_irq_attr *irq_attr);
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extern void setup_ioapic_dest(void);
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extern void enable_IO_APIC(void);
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/* Statistics */
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extern atomic_t irq_err_count;
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extern atomic_t irq_mis_count;
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/* EISA */
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extern void eisa_set_level_irq(unsigned int irq);
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/* SMP */
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extern void smp_apic_timer_interrupt(struct pt_regs *);
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extern void smp_spurious_interrupt(struct pt_regs *);
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extern void smp_generic_interrupt(struct pt_regs *);
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extern void smp_error_interrupt(struct pt_regs *);
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#ifdef CONFIG_X86_IO_APIC
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extern asmlinkage void smp_irq_move_cleanup_interrupt(void);
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#endif
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#ifdef CONFIG_SMP
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extern void smp_reschedule_interrupt(struct pt_regs *);
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extern void smp_call_function_interrupt(struct pt_regs *);
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extern void smp_call_function_single_interrupt(struct pt_regs *);
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#ifdef CONFIG_X86_32
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extern void smp_invalidate_interrupt(struct pt_regs *);
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#else
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extern asmlinkage void smp_invalidate_interrupt(struct pt_regs *);
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#endif
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#endif
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extern void (*__initconst interrupt[NR_VECTORS-FIRST_EXTERNAL_VECTOR])(void);
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typedef int vector_irq_t[NR_VECTORS];
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DECLARE_PER_CPU(vector_irq_t, vector_irq);
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#ifdef CONFIG_X86_IO_APIC
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extern void lock_vector_lock(void);
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extern void unlock_vector_lock(void);
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extern void __setup_vector_irq(int cpu);
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#else
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static inline void lock_vector_lock(void) {}
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static inline void unlock_vector_lock(void) {}
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static inline void __setup_vector_irq(int cpu) {}
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#endif
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#endif /* !ASSEMBLY_ */
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#endif /* _ASM_X86_HW_IRQ_H */
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