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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
25struct kvm;
26struct kvm_vcpu;
27
28struct 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
49struct 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
62int kvm_pic_init(struct kvm *kvm);
63void kvm_pic_destroy(struct kvm *kvm);
64int kvm_pic_read_irq(struct kvm *kvm);
65void kvm_pic_update_irq(struct kvm_pic *s);
66
67static 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
76static 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
85static inline int pic_in_kernel(struct kvm *kvm)
86{
87 return irqchip_kernel(kvm);
88}
89
90static 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
99void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu);
100void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu);
101void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu);
102void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu);
103void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu);
104void __kvm_migrate_timers(struct kvm_vcpu *vcpu);
105
106int apic_has_pending_timer(struct kvm_vcpu *vcpu);
107
108int kvm_setup_default_irq_routing(struct kvm *kvm);
109int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
110 struct kvm_lapic_irq *irq,
111 struct dest_map *dest_map);
112
113#endif
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
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_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
76struct kvm_pic *kvm_create_pic(struct kvm *kvm);
77void kvm_destroy_pic(struct kvm_pic *vpic);
78int kvm_pic_read_irq(struct kvm *kvm);
79void kvm_pic_update_irq(struct kvm_pic *s);
80
81static inline struct kvm_pic *pic_irqchip(struct kvm *kvm)
82{
83 return kvm->arch.vpic;
84}
85
86static inline int pic_in_kernel(struct kvm *kvm)
87{
88 int ret;
89
90 ret = (pic_irqchip(kvm) != NULL);
91 return ret;
92}
93
94static inline int irqchip_split(struct kvm *kvm)
95{
96 return kvm->arch.irqchip_split;
97}
98
99static inline int irqchip_in_kernel(struct kvm *kvm)
100{
101 struct kvm_pic *vpic = pic_irqchip(kvm);
102 bool ret;
103
104 ret = (vpic != NULL);
105 ret |= irqchip_split(kvm);
106
107 /* Read vpic before kvm->irq_routing. */
108 smp_rmb();
109 return ret;
110}
111
112void kvm_pic_reset(struct kvm_kpic_state *s);
113
114void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu);
115void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu);
116void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu);
117void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu);
118void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu);
119void __kvm_migrate_timers(struct kvm_vcpu *vcpu);
120
121int apic_has_pending_timer(struct kvm_vcpu *vcpu);
122
123#endif