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