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Linux/arch/x86/kvm/irq.h

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  1 /*
  2  * irq.h: in kernel interrupt controller related definitions
  3  * Copyright (c) 2007, Intel Corporation.
  4  *
  5  * This program is free software; you can redistribute it and/or modify it
  6  * under the terms and conditions of the GNU General Public License,
  7  * version 2, as published by the Free Software Foundation.
  8  *
  9  * This program is distributed in the hope it will be useful, but WITHOUT
 10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 12  * more details.
 13  *
 14  * You should have received a copy of the GNU General Public License along with
 15  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 16  * Place - Suite 330, Boston, MA 02111-1307 USA.
 17  * Authors:
 18  *   Yaozu (Eddie) Dong <Eddie.dong@intel.com>
 19  *
 20  */
 21 
 22 #ifndef __IRQ_H
 23 #define __IRQ_H
 24 
 25 #include <linux/mm_types.h>
 26 #include <linux/hrtimer.h>
 27 #include <linux/kvm_host.h>
 28 #include <linux/spinlock.h>
 29 
 30 #include "iodev.h"
 31 #include "ioapic.h"
 32 #include "lapic.h"
 33 
 34 #define PIC_NUM_PINS 16
 35 #define SELECT_PIC(irq) \
 36         ((irq) < 8 ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE)
 37 
 38 struct kvm;
 39 struct kvm_vcpu;
 40 
 41 typedef void irq_request_func(void *opaque, int level);
 42 
 43 struct kvm_kpic_state {
 44         u8 last_irr;    /* edge detection */
 45         u8 irr;         /* interrupt request register */
 46         u8 imr;         /* interrupt mask register */
 47         u8 isr;         /* interrupt service register */
 48         u8 isr_ack;     /* interrupt ack detection */
 49         u8 priority_add;        /* highest irq priority */
 50         u8 irq_base;
 51         u8 read_reg_select;
 52         u8 poll;
 53         u8 special_mask;
 54         u8 init_state;
 55         u8 auto_eoi;
 56         u8 rotate_on_auto_eoi;
 57         u8 special_fully_nested_mode;
 58         u8 init4;               /* true if 4 byte init */
 59         u8 elcr;                /* PIIX edge/trigger selection */
 60         u8 elcr_mask;
 61         struct kvm_pic *pics_state;
 62 };
 63 
 64 struct kvm_pic {
 65         spinlock_t lock;
 66         unsigned pending_acks;
 67         struct kvm *kvm;
 68         struct kvm_kpic_state pics[2]; /* 0 is master pic, 1 is slave pic */
 69         irq_request_func *irq_request;
 70         void *irq_request_opaque;
 71         int output;             /* intr from master PIC */
 72         struct kvm_io_device dev;
 73         void (*ack_notifier)(void *opaque, int irq);
 74 };
 75 
 76 struct kvm_pic *kvm_create_pic(struct kvm *kvm);
 77 int kvm_pic_read_irq(struct kvm *kvm);
 78 void kvm_pic_update_irq(struct kvm_pic *s);
 79 void kvm_pic_clear_isr_ack(struct kvm *kvm);
 80 
 81 static inline struct kvm_pic *pic_irqchip(struct kvm *kvm)
 82 {
 83         return kvm->arch.vpic;
 84 }
 85 
 86 static inline int irqchip_in_kernel(struct kvm *kvm)
 87 {
 88         int ret;
 89 
 90         ret = (pic_irqchip(kvm) != NULL);
 91         smp_rmb();
 92         return ret;
 93 }
 94 
 95 void kvm_pic_reset(struct kvm_kpic_state *s);
 96 
 97 void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu);
 98 void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu);
 99 void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu);
100 void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu);
101 void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu);
102 void __kvm_migrate_timers(struct kvm_vcpu *vcpu);
103 
104 int pit_has_pending_timer(struct kvm_vcpu *vcpu);
105 int apic_has_pending_timer(struct kvm_vcpu *vcpu);
106 
107 #endif
108 

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