| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 <kvm/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 | struct 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 | |
| 62 | struct kvm_pic { |
| 63 | 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_master; |
| 70 | struct kvm_io_device dev_slave; |
| 71 | struct kvm_io_device dev_eclr; |
| 72 | void (*ack_notifier)(void *opaque, int irq); |
| 73 | unsigned long irq_states[PIC_NUM_PINS]; |
| 74 | }; |
| 75 | |
| 76 | int kvm_pic_init(struct kvm *kvm); |
| 77 | void kvm_pic_destroy(struct kvm *kvm); |
| 78 | int kvm_pic_read_irq(struct kvm *kvm); |
| 79 | void kvm_pic_update_irq(struct kvm_pic *s); |
| 80 | |
| 81 | static inline int pic_in_kernel(struct kvm *kvm) |
| 82 | { |
| 83 | int mode = kvm->arch.irqchip_mode; |
| 84 | |
| 85 | /* Matches smp_wmb() when setting irqchip_mode */ |
| 86 | smp_rmb(); |
| 87 | return mode == KVM_IRQCHIP_KERNEL; |
| 88 | } |
| 89 | |
| 90 | static inline int irqchip_split(struct kvm *kvm) |
| 91 | { |
| 92 | int mode = kvm->arch.irqchip_mode; |
| 93 | |
| 94 | /* Matches smp_wmb() when setting irqchip_mode */ |
| 95 | smp_rmb(); |
| 96 | return mode == KVM_IRQCHIP_SPLIT; |
| 97 | } |
| 98 | |
| 99 | static inline int irqchip_kernel(struct kvm *kvm) |
| 100 | { |
| 101 | int mode = kvm->arch.irqchip_mode; |
| 102 | |
| 103 | /* Matches smp_wmb() when setting irqchip_mode */ |
| 104 | smp_rmb(); |
| 105 | return mode == KVM_IRQCHIP_KERNEL; |
| 106 | } |
| 107 | |
| 108 | static inline int irqchip_in_kernel(struct kvm *kvm) |
| 109 | { |
| 110 | int mode = kvm->arch.irqchip_mode; |
| 111 | |
| 112 | /* Matches smp_wmb() when setting irqchip_mode */ |
| 113 | smp_rmb(); |
| 114 | return mode != KVM_IRQCHIP_NONE; |
| 115 | } |
| 116 | |
| 117 | void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu); |
| 118 | void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu); |
| 119 | void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu); |
| 120 | void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu); |
| 121 | void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu); |
| 122 | void __kvm_migrate_timers(struct kvm_vcpu *vcpu); |
| 123 | |
| 124 | int apic_has_pending_timer(struct kvm_vcpu *vcpu); |
| 125 | |
| 126 | int kvm_setup_default_irq_routing(struct kvm *kvm); |
| 127 | int kvm_setup_empty_irq_routing(struct kvm *kvm); |
| 128 | |
| 129 | #endif |