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root/arch/x86/kvm/irq.h

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INCLUDED FROM


DEFINITIONS

This source file includes following definitions.
  1. pic_irqchip
  2. irqchip_in_kernel

/*
 * irq.h: in kernel interrupt controller related definitions
 * Copyright (c) 2007, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307 USA.
 * Authors:
 *   Yaozu (Eddie) Dong <Eddie.dong@intel.com>
 *
 */

#ifndef __IRQ_H
#define __IRQ_H

#include <linux/mm_types.h>
#include <linux/hrtimer.h>
#include <linux/kvm_host.h>

#include "iodev.h"
#include "ioapic.h"
#include "lapic.h"

#define PIC_NUM_PINS 16

struct kvm;
struct kvm_vcpu;

typedef void irq_request_func(void *opaque, int level);

struct kvm_kpic_state {
        u8 last_irr;    /* edge detection */
        u8 irr;         /* interrupt request register */
        u8 imr;         /* interrupt mask register */
        u8 isr;         /* interrupt service register */
        u8 priority_add;        /* highest irq priority */
        u8 irq_base;
        u8 read_reg_select;
        u8 poll;
        u8 special_mask;
        u8 init_state;
        u8 auto_eoi;
        u8 rotate_on_auto_eoi;
        u8 special_fully_nested_mode;
        u8 init4;               /* true if 4 byte init */
        u8 elcr;                /* PIIX edge/trigger selection */
        u8 elcr_mask;
        struct kvm_pic *pics_state;
};

struct kvm_pic {
        struct kvm_kpic_state pics[2]; /* 0 is master pic, 1 is slave pic */
        irq_request_func *irq_request;
        void *irq_request_opaque;
        int output;             /* intr from master PIC */
        struct kvm_io_device dev;
};

struct kvm_pic *kvm_create_pic(struct kvm *kvm);
void kvm_pic_set_irq(void *opaque, int irq, int level);
int kvm_pic_read_irq(struct kvm_pic *s);
void kvm_pic_update_irq(struct kvm_pic *s);

static inline struct kvm_pic *pic_irqchip(struct kvm *kvm)
{
        return kvm->arch.vpic;
}

static inline int irqchip_in_kernel(struct kvm *kvm)
{
        return pic_irqchip(kvm) != NULL;
}

void kvm_pic_reset(struct kvm_kpic_state *s);

void kvm_timer_intr_post(struct kvm_vcpu *vcpu, int vec);
void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu);
void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu);
void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu);
void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu);
void __kvm_migrate_timers(struct kvm_vcpu *vcpu);

int pit_has_pending_timer(struct kvm_vcpu *vcpu);
int apic_has_pending_timer(struct kvm_vcpu *vcpu);

#endif

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