1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * irq.h: in kernel interrupt controller related definitions
4 * Copyright (c) 2007, Intel Corporation.
7 * Yaozu (Eddie) Dong <Eddie.dong@intel.com>
13 #include <linux/mm_types.h>
14 #include <linux/hrtimer.h>
15 #include <linux/kvm_host.h>
16 #include <linux/spinlock.h>
18 #include <kvm/iodev.h>
21 #define PIC_NUM_PINS 16
22 #define SELECT_PIC(irq) \
23 ((irq) < 8 ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE)
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 */
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 */
45 u8 isr_ack; /* interrupt ack detection */
46 struct kvm_pic *pics_state;
52 unsigned pending_acks;
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_eclr;
59 void (*ack_notifier)(void *opaque, int irq);
60 unsigned long irq_states[PIC_NUM_PINS];
63 int kvm_pic_init(struct kvm *kvm);
64 void kvm_pic_destroy(struct kvm *kvm);
65 int kvm_pic_read_irq(struct kvm *kvm);
66 void kvm_pic_update_irq(struct kvm_pic *s);
68 static inline int irqchip_split(struct kvm *kvm)
70 int mode = kvm->arch.irqchip_mode;
72 /* Matches smp_wmb() when setting irqchip_mode */
74 return mode == KVM_IRQCHIP_SPLIT;
77 static inline int irqchip_kernel(struct kvm *kvm)
79 int mode = kvm->arch.irqchip_mode;
81 /* Matches smp_wmb() when setting irqchip_mode */
83 return mode == KVM_IRQCHIP_KERNEL;
86 static inline int pic_in_kernel(struct kvm *kvm)
88 return irqchip_kernel(kvm);
91 static inline int irqchip_in_kernel(struct kvm *kvm)
93 int mode = kvm->arch.irqchip_mode;
95 /* Matches smp_wmb() when setting irqchip_mode */
97 return mode != KVM_IRQCHIP_NONE;
100 void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu);
101 void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu);
102 void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu);
103 void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu);
104 void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu);
105 void __kvm_migrate_timers(struct kvm_vcpu *vcpu);
107 int apic_has_pending_timer(struct kvm_vcpu *vcpu);
109 int kvm_setup_default_irq_routing(struct kvm *kvm);
110 int kvm_setup_empty_irq_routing(struct kvm *kvm);
111 int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
112 struct kvm_lapic_irq *irq,
113 struct dest_map *dest_map);