1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* |
3 | * irq.h: in kernel interrupt controller related definitions |
4 | * Copyright (c) 2007, Intel Corporation. |
5 | * |
6 | * Authors: |
7 | * Yaozu (Eddie) Dong <Eddie.dong@intel.com> |
8 | */ |
9 | |
10 | #ifndef __IRQ_H |
11 | #define __IRQ_H |
12 | |
13 | #include <linux/mm_types.h> |
14 | #include <linux/hrtimer.h> |
15 | #include <linux/kvm_host.h> |
16 | #include <linux/spinlock.h> |
17 | |
18 | #include <kvm/iodev.h> |
19 | #include "lapic.h" |
20 | |
21 | #define PIC_NUM_PINS 16 |
22 | #define SELECT_PIC(irq) \ |
23 | ((irq) < 8 ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE) |
24 | |
25 | struct kvm; |
26 | struct kvm_vcpu; |
27 | |
28 | struct kvm_kpic_state { |
29 | u8 last_irr; /* edge detection */ |
30 | u8 irr; /* interrupt request register */ |
31 | u8 imr; /* interrupt mask register */ |
32 | u8 isr; /* interrupt service register */ |
33 | u8 priority_add; /* highest irq priority */ |
34 | u8 irq_base; |
35 | u8 read_reg_select; |
36 | u8 poll; |
37 | u8 special_mask; |
38 | u8 init_state; |
39 | u8 auto_eoi; |
40 | u8 rotate_on_auto_eoi; |
41 | u8 special_fully_nested_mode; |
42 | u8 init4; /* true if 4 byte init */ |
43 | u8 elcr; /* PIIX edge/trigger selection */ |
44 | u8 elcr_mask; |
45 | u8 isr_ack; /* interrupt ack detection */ |
46 | struct kvm_pic *pics_state; |
47 | }; |
48 | |
49 | struct kvm_pic { |
50 | spinlock_t lock; |
51 | bool wakeup_needed; |
52 | unsigned pending_acks; |
53 | struct kvm *kvm; |
54 | struct kvm_kpic_state pics[2]; /* 0 is master pic, 1 is slave pic */ |
55 | int output; /* intr from master PIC */ |
56 | struct kvm_io_device dev_master; |
57 | struct kvm_io_device dev_slave; |
58 | struct kvm_io_device dev_elcr; |
59 | unsigned long irq_states[PIC_NUM_PINS]; |
60 | }; |
61 | |
62 | int kvm_pic_init(struct kvm *kvm); |
63 | void kvm_pic_destroy(struct kvm *kvm); |
64 | int kvm_pic_read_irq(struct kvm *kvm); |
65 | void kvm_pic_update_irq(struct kvm_pic *s); |
66 | |
67 | static inline int irqchip_split(struct kvm *kvm) |
68 | { |
69 | int mode = kvm->arch.irqchip_mode; |
70 | |
71 | /* Matches smp_wmb() when setting irqchip_mode */ |
72 | smp_rmb(); |
73 | return mode == KVM_IRQCHIP_SPLIT; |
74 | } |
75 | |
76 | static inline int irqchip_kernel(struct kvm *kvm) |
77 | { |
78 | int mode = kvm->arch.irqchip_mode; |
79 | |
80 | /* Matches smp_wmb() when setting irqchip_mode */ |
81 | smp_rmb(); |
82 | return mode == KVM_IRQCHIP_KERNEL; |
83 | } |
84 | |
85 | static inline int pic_in_kernel(struct kvm *kvm) |
86 | { |
87 | return irqchip_kernel(kvm); |
88 | } |
89 | |
90 | static inline int irqchip_in_kernel(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_NONE; |
97 | } |
98 | |
99 | void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu); |
100 | void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu); |
101 | void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu); |
102 | void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu); |
103 | void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu); |
104 | void __kvm_migrate_timers(struct kvm_vcpu *vcpu); |
105 | |
106 | int apic_has_pending_timer(struct kvm_vcpu *vcpu); |
107 | |
108 | int kvm_setup_default_irq_routing(struct kvm *kvm); |
109 | int kvm_setup_empty_irq_routing(struct kvm *kvm); |
110 | int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src, |
111 | struct kvm_lapic_irq *irq, |
112 | struct dest_map *dest_map); |
113 | |
114 | #endif |
115 | |