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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 | /* SPDX-License-Identifier: GPL-2.0-only */ /* * irq.h: in kernel interrupt controller related definitions * Copyright (c) 2007, Intel Corporation. * * Authors: * Yaozu (Eddie) Dong <Eddie.dong@intel.com> */ #ifndef __IRQ_H #define __IRQ_H #include <linux/mm_types.h> #include <linux/hrtimer.h> #include <linux/kvm_host.h> #include <linux/spinlock.h> #include <kvm/iodev.h> #include "ioapic.h" #include "lapic.h" #define PIC_NUM_PINS 16 #define SELECT_PIC(irq) \ ((irq) < 8 ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE) struct kvm; struct kvm_vcpu; struct kvm_kpic_state { u8 last_irr; /* edge detection */ u8 irr; /* interrupt request register */ u8 imr; /* interrupt mask register */ u8 isr; /* interrupt service register */ u8 priority_add; /* highest irq priority */ u8 irq_base; u8 read_reg_select; u8 poll; u8 special_mask; u8 init_state; u8 auto_eoi; u8 rotate_on_auto_eoi; u8 special_fully_nested_mode; u8 init4; /* true if 4 byte init */ u8 elcr; /* PIIX edge/trigger selection */ u8 elcr_mask; u8 isr_ack; /* interrupt ack detection */ struct kvm_pic *pics_state; }; struct kvm_pic { spinlock_t lock; bool wakeup_needed; unsigned pending_acks; struct kvm *kvm; struct kvm_kpic_state pics[2]; /* 0 is master pic, 1 is slave pic */ int output; /* intr from master PIC */ struct kvm_io_device dev_master; struct kvm_io_device dev_slave; struct kvm_io_device dev_eclr; void (*ack_notifier)(void *opaque, int irq); unsigned long irq_states[PIC_NUM_PINS]; }; int kvm_pic_init(struct kvm *kvm); void kvm_pic_destroy(struct kvm *kvm); int kvm_pic_read_irq(struct kvm *kvm); void kvm_pic_update_irq(struct kvm_pic *s); static inline int pic_in_kernel(struct kvm *kvm) { int mode = kvm->arch.irqchip_mode; /* Matches smp_wmb() when setting irqchip_mode */ smp_rmb(); return mode == KVM_IRQCHIP_KERNEL; } static inline int irqchip_split(struct kvm *kvm) { int mode = kvm->arch.irqchip_mode; /* Matches smp_wmb() when setting irqchip_mode */ smp_rmb(); return mode == KVM_IRQCHIP_SPLIT; } static inline int irqchip_kernel(struct kvm *kvm) { int mode = kvm->arch.irqchip_mode; /* Matches smp_wmb() when setting irqchip_mode */ smp_rmb(); return mode == KVM_IRQCHIP_KERNEL; } static inline int irqchip_in_kernel(struct kvm *kvm) { int mode = kvm->arch.irqchip_mode; /* Matches smp_wmb() when setting irqchip_mode */ smp_rmb(); return mode != KVM_IRQCHIP_NONE; } void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu); void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu); void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu); void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu); void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu); void __kvm_migrate_timers(struct kvm_vcpu *vcpu); int apic_has_pending_timer(struct kvm_vcpu *vcpu); int kvm_setup_default_irq_routing(struct kvm *kvm); int kvm_setup_empty_irq_routing(struct kvm *kvm); #endif |