![Yang Zhang](/assets/img/avatar_default.png)
Posted Interrupt feature requires a special IPI to deliver posted interrupt to guest. And it should has a high priority so the interrupt will not be blocked by others. Normally, the posted interrupt will be consumed by vcpu if target vcpu is running and transparent to OS. But in some cases, the interrupt will arrive when target vcpu is scheduled out. And host will see it. So we need to register a dump handler to handle it. Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com> Acked-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
195 lines
5.4 KiB
C
195 lines
5.4 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 <linux/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 x86_platform_ipi(void);
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extern void kvm_posted_intr_ipi(void);
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extern void error_interrupt(void);
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extern void irq_work_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 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 invalidate_interrupt8(void);
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extern void invalidate_interrupt9(void);
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extern void invalidate_interrupt10(void);
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extern void invalidate_interrupt11(void);
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extern void invalidate_interrupt12(void);
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extern void invalidate_interrupt13(void);
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extern void invalidate_interrupt14(void);
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extern void invalidate_interrupt15(void);
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extern void invalidate_interrupt16(void);
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extern void invalidate_interrupt17(void);
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extern void invalidate_interrupt18(void);
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extern void invalidate_interrupt19(void);
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extern void invalidate_interrupt20(void);
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extern void invalidate_interrupt21(void);
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extern void invalidate_interrupt22(void);
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extern void invalidate_interrupt23(void);
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extern void invalidate_interrupt24(void);
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extern void invalidate_interrupt25(void);
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extern void invalidate_interrupt26(void);
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extern void invalidate_interrupt27(void);
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extern void invalidate_interrupt28(void);
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extern void invalidate_interrupt29(void);
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extern void invalidate_interrupt30(void);
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extern void invalidate_interrupt31(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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/* 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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/* Intel specific interrupt remapping information */
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struct irq_2_iommu {
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struct intel_iommu *iommu;
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u16 irte_index;
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u16 sub_handle;
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u8 irte_mask;
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};
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/* AMD specific interrupt remapping information */
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struct irq_2_irte {
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u16 devid; /* Device ID for IRTE table */
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u16 index; /* Index into IRTE table*/
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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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#ifdef CONFIG_IRQ_REMAP
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u8 remapped : 1;
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union {
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struct irq_2_iommu irq_2_iommu;
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struct irq_2_irte irq_2_irte;
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};
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#endif
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};
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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_data;
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int __ioapic_set_affinity(struct irq_data *, const struct cpumask *,
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unsigned int *dest_id);
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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_x86_platform_ipi(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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extern void setup_vector_irq(int cpu);
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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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