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 29 #include "iodev.h" 30 #include "ioapic.h" 31 #include "lapic.h" 32 33 struct kvm; 34 struct kvm_vcpu; 35 36 typedef void irq_request_func(void *opaque, int level); 37 38 struct kvm_kpic_state { 39 u8 last_irr; /* edge detection */ 40 u8 irr; /* interrupt request register */ 41 u8 imr; /* interrupt mask register */ 42 u8 isr; /* interrupt service register */ 43 u8 priority_add; /* highest irq priority */ 44 u8 irq_base; 45 u8 read_reg_select; 46 u8 poll; 47 u8 special_mask; 48 u8 init_state; 49 u8 auto_eoi; 50 u8 rotate_on_auto_eoi; 51 u8 special_fully_nested_mode; 52 u8 init4; /* true if 4 byte init */ 53 u8 elcr; /* PIIX edge/trigger selection */ 54 u8 elcr_mask; 55 struct kvm_pic *pics_state; 56 }; 57 58 struct kvm_pic { 59 struct kvm_kpic_state pics[2]; /* 0 is master pic, 1 is slave pic */ 60 irq_request_func *irq_request; 61 void *irq_request_opaque; 62 int output; /* intr from master PIC */ 63 struct kvm_io_device dev; 64 }; 65 66 struct kvm_pic *kvm_create_pic(struct kvm *kvm); 67 void kvm_pic_set_irq(void *opaque, int irq, int level); 68 int kvm_pic_read_irq(struct kvm_pic *s); 69 void kvm_pic_update_irq(struct kvm_pic *s); 70 71 static inline struct kvm_pic *pic_irqchip(struct kvm *kvm) 72 { 73 return kvm->arch.vpic; 74 } 75 76 static inline int irqchip_in_kernel(struct kvm *kvm) 77 { 78 return pic_irqchip(kvm) != NULL; 79 } 80 81 void kvm_pic_reset(struct kvm_kpic_state *s); 82 83 void kvm_timer_intr_post(struct kvm_vcpu *vcpu, int vec); 84 void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu); 85 void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu); 86 void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu); 87 88 int pit_has_pending_timer(struct kvm_vcpu *vcpu); 89 int apic_has_pending_timer(struct kvm_vcpu *vcpu); 90 91 #endif 92