1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __KVM_IO_APIC_H
3 #define __KVM_IO_APIC_H
4
5 #include <linux/kvm_host.h>
6 #include <kvm/iodev.h>
7 #include "irq.h"
8
9 #ifdef CONFIG_KVM_IOAPIC
10
11 struct kvm;
12 struct kvm_vcpu;
13
14 #define IOAPIC_NUM_PINS KVM_IOAPIC_NUM_PINS
15 #define IOAPIC_VERSION_ID 0x11 /* IOAPIC version */
16 #define IOAPIC_EDGE_TRIG 0
17 #define IOAPIC_LEVEL_TRIG 1
18
19 #define IOAPIC_DEFAULT_BASE_ADDRESS 0xfec00000
20 #define IOAPIC_MEM_LENGTH 0x100
21
22 /* Direct registers. */
23 #define IOAPIC_REG_SELECT 0x00
24 #define IOAPIC_REG_WINDOW 0x10
25
26 /* Indirect registers. */
27 #define IOAPIC_REG_APIC_ID 0x00 /* x86 IOAPIC only */
28 #define IOAPIC_REG_VERSION 0x01
29 #define IOAPIC_REG_ARB_ID 0x02 /* x86 IOAPIC only */
30
31 /*ioapic delivery mode*/
32 #define IOAPIC_FIXED 0x0
33 #define IOAPIC_LOWEST_PRIORITY 0x1
34 #define IOAPIC_PMI 0x2
35 #define IOAPIC_NMI 0x4
36 #define IOAPIC_INIT 0x5
37 #define IOAPIC_EXTINT 0x7
38
39 #define RTC_GSI 8
40
41 struct rtc_status {
42 int pending_eoi;
43
44 /* vcpu bitmap where IRQ has been sent */
45 DECLARE_BITMAP(map, KVM_MAX_VCPU_IDS);
46
47 /*
48 * Vector sent to a given vcpu, only valid when
49 * the vcpu's bit in map is set
50 */
51 u8 vectors[KVM_MAX_VCPU_IDS];
52 };
53
54 union kvm_ioapic_redirect_entry {
55 u64 bits;
56 struct {
57 u8 vector;
58 u8 delivery_mode:3;
59 u8 dest_mode:1;
60 u8 delivery_status:1;
61 u8 polarity:1;
62 u8 remote_irr:1;
63 u8 trig_mode:1;
64 u8 mask:1;
65 u8 reserve:7;
66 u8 reserved[4];
67 u8 dest_id;
68 } fields;
69 };
70
71 struct kvm_ioapic {
72 u64 base_address;
73 u32 ioregsel;
74 u32 id;
75 u32 irr;
76 u32 pad;
77 union kvm_ioapic_redirect_entry redirtbl[IOAPIC_NUM_PINS];
78 unsigned long irq_states[IOAPIC_NUM_PINS];
79 struct kvm_io_device dev;
80 struct kvm *kvm;
81 spinlock_t lock;
82 struct rtc_status rtc_status;
83 struct delayed_work eoi_inject;
84 u32 irq_eoi[IOAPIC_NUM_PINS];
85 u32 irr_delivered;
86
87 /* reads protected by irq_srcu, writes by irq_lock */
88 struct hlist_head mask_notifier_list;
89 };
90
91 struct kvm_irq_mask_notifier {
92 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
93 int irq;
94 struct hlist_node link;
95 };
96
97 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
98 struct kvm_irq_mask_notifier *kimn);
99 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
100 struct kvm_irq_mask_notifier *kimn);
101 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
102 bool mask);
103
104 void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu);
105 void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector,
106 int trigger_mode);
107 int kvm_ioapic_init(struct kvm *kvm);
108 void kvm_ioapic_destroy(struct kvm *kvm);
109 int kvm_ioapic_set_irq(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
110 int irq_source_id, int level, bool line_status);
111
112 void kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
113 void kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
114 void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu,
115 ulong *ioapic_handled_vectors);
116 #endif /* CONFIG_KVM_IOAPIC */
117
ioapic_in_kernel(struct kvm * kvm)118 static inline int ioapic_in_kernel(struct kvm *kvm)
119 {
120 return irqchip_full(kvm);
121 }
122
123 void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
124 ulong *ioapic_handled_vectors);
125 void kvm_scan_ioapic_irq(struct kvm_vcpu *vcpu, u32 dest_id, u16 dest_mode,
126 u8 vector, unsigned long *ioapic_handled_vectors);
127 #endif
128