2 * irq.h: in kernel interrupt controller related definitions
3 * Copyright (c) 2007, Intel Corporation.
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.
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
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.
25 #include <linux/mm_types.h>
26 #include <linux/hrtimer.h>
27 #include <linux/kvm_host.h>
33 #define PIC_NUM_PINS 16
38 typedef void irq_request_func(void *opaque, int level);
40 struct kvm_kpic_state {
41 u8 last_irr; /* edge detection */
42 u8 irr; /* interrupt request register */
43 u8 imr; /* interrupt mask register */
44 u8 isr; /* interrupt service register */
45 u8 isr_ack; /* interrupt ack detection */
46 u8 priority_add; /* highest irq priority */
53 u8 rotate_on_auto_eoi;
54 u8 special_fully_nested_mode;
55 u8 init4; /* true if 4 byte init */
56 u8 elcr; /* PIIX edge/trigger selection */
58 struct kvm_pic *pics_state;
62 struct kvm_kpic_state pics[2]; /* 0 is master pic, 1 is slave pic */
63 irq_request_func *irq_request;
64 void *irq_request_opaque;
65 int output; /* intr from master PIC */
66 struct kvm_io_device dev;
67 void (*ack_notifier)(void *opaque, int irq);
70 struct kvm_pic *kvm_create_pic(struct kvm *kvm);
71 void kvm_pic_set_irq(void *opaque, int irq, int level);
72 int kvm_pic_read_irq(struct kvm *kvm);
73 void kvm_pic_update_irq(struct kvm_pic *s);
74 void kvm_pic_clear_isr_ack(struct kvm *kvm);
76 static inline struct kvm_pic *pic_irqchip(struct kvm *kvm)
78 return kvm->arch.vpic;
81 static inline int irqchip_in_kernel(struct kvm *kvm)
83 return pic_irqchip(kvm) != NULL;
86 void kvm_pic_reset(struct kvm_kpic_state *s);
88 void kvm_set_irq(struct kvm *kvm, int irq, int level);
89 void kvm_notify_acked_irq(struct kvm *kvm, unsigned gsi);
90 void kvm_register_irq_ack_notifier(struct kvm *kvm,
91 struct kvm_irq_ack_notifier *kian);
92 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
93 struct kvm_irq_ack_notifier *kian);
95 void kvm_timer_intr_post(struct kvm_vcpu *vcpu, int vec);
96 void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu);
97 void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu);
98 void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu);
99 void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu);
100 void __kvm_migrate_timers(struct kvm_vcpu *vcpu);
102 int pit_has_pending_timer(struct kvm_vcpu *vcpu);
103 int apic_has_pending_timer(struct kvm_vcpu *vcpu);