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 bool wakeup_needed; 67 unsigned pending_acks; 68 struct kvm *kvm; 69 struct kvm_kpic_state pics[2]; /* 0 is master pic, 1 is slave pic */ 70 irq_request_func *irq_request; 71 void *irq_request_opaque; 72 int output; /* intr from master PIC */ 73 struct kvm_io_device dev; 74 void (*ack_notifier)(void *opaque, int irq); 75 }; 76 77 struct kvm_pic *kvm_create_pic(struct kvm *kvm); 78 int kvm_pic_read_irq(struct kvm *kvm); 79 void kvm_pic_update_irq(struct kvm_pic *s); 80 void kvm_pic_clear_isr_ack(struct kvm *kvm); 81 82 static inline struct kvm_pic *pic_irqchip(struct kvm *kvm) 83 { 84 return kvm->arch.vpic; 85 } 86 87 static inline int irqchip_in_kernel(struct kvm *kvm) 88 { 89 return pic_irqchip(kvm) != NULL; 90 } 91 92 void kvm_pic_reset(struct kvm_kpic_state *s); 93 94 void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu); 95 void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu); 96 void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu); 97 void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu); 98 void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu); 99 void __kvm_migrate_timers(struct kvm_vcpu *vcpu); 100 101 int pit_has_pending_timer(struct kvm_vcpu *vcpu); 102 int apic_has_pending_timer(struct kvm_vcpu *vcpu); 103 104 #endif 105