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 38struct kvm; 39struct kvm_vcpu; 40 41struct kvm_kpic_state { 42 u8 last_irr; /* edge detection */ 43 u8 irr; /* interrupt request register */ 44 u8 imr; /* interrupt mask register */ 45 u8 isr; /* interrupt service register */ 46 u8 priority_add; /* highest irq priority */ 47 u8 irq_base; 48 u8 read_reg_select; 49 u8 poll; 50 u8 special_mask; 51 u8 init_state; 52 u8 auto_eoi; 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 */ 57 u8 elcr_mask; 58 u8 isr_ack; /* interrupt ack detection */ 59 struct kvm_pic *pics_state; 60}; 61 62struct kvm_pic { 63 raw_spinlock_t lock; 64 bool wakeup_needed; 65 unsigned pending_acks; 66 struct kvm *kvm; 67 struct kvm_kpic_state pics[2]; /* 0 is master pic, 1 is slave pic */ 68 int output; /* intr from master PIC */ 69 struct kvm_io_device dev; 70 void (*ack_notifier)(void *opaque, int irq); 71 unsigned long irq_states[16]; 72}; 73 74struct kvm_pic *kvm_create_pic(struct kvm *kvm); 75void kvm_destroy_pic(struct kvm *kvm); 76int kvm_pic_read_irq(struct kvm *kvm); 77void kvm_pic_update_irq(struct kvm_pic *s); 78void kvm_pic_clear_isr_ack(struct kvm *kvm); 79 80static inline struct kvm_pic *pic_irqchip(struct kvm *kvm) 81{ 82 return kvm->arch.vpic; 83} 84 85static inline int irqchip_in_kernel(struct kvm *kvm) 86{ 87 int ret; 88 89 ret = (pic_irqchip(kvm) != NULL); 90 smp_rmb(); 91 return ret; 92} 93 94void kvm_pic_reset(struct kvm_kpic_state *s); 95 96void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu); 97void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu); 98void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu); 99void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu); 100void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu); 101void __kvm_migrate_timers(struct kvm_vcpu *vcpu); 102 103int pit_has_pending_timer(struct kvm_vcpu *vcpu); 104int apic_has_pending_timer(struct kvm_vcpu *vcpu); 105 106#endif 107