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 struct kvm;
10 struct kvm_vcpu;
11
12 #define IOAPIC_NUM_PINS KVM_IOAPIC_NUM_PINS
13 #define MAX_NR_RESERVED_IOAPIC_PINS KVM_MAX_IRQ_ROUTES
14 #define IOAPIC_VERSION_ID 0x11 /* IOAPIC version */
15 #define IOAPIC_EDGE_TRIG 0
16 #define IOAPIC_LEVEL_TRIG 1
17
18 #define IOAPIC_DEFAULT_BASE_ADDRESS 0xfec00000
19 #define IOAPIC_MEM_LENGTH 0x100
20
21 /* Direct registers. */
22 #define IOAPIC_REG_SELECT 0x00
23 #define IOAPIC_REG_WINDOW 0x10
24
25 /* Indirect registers. */
26 #define IOAPIC_REG_APIC_ID 0x00 /* x86 IOAPIC only */
27 #define IOAPIC_REG_VERSION 0x01
28 #define IOAPIC_REG_ARB_ID 0x02 /* x86 IOAPIC only */
29
30 /*ioapic delivery mode*/
31 #define IOAPIC_FIXED 0x0
32 #define IOAPIC_LOWEST_PRIORITY 0x1
33 #define IOAPIC_PMI 0x2
34 #define IOAPIC_NMI 0x4
35 #define IOAPIC_INIT 0x5
36 #define IOAPIC_EXTINT 0x7
37
38 #define RTC_GSI 8
39
40 struct dest_map {
41 /* vcpu bitmap where IRQ has been sent */
42 DECLARE_BITMAP(map, KVM_MAX_VCPU_IDS);
43
44 /*
45 * Vector sent to a given vcpu, only valid when
46 * the vcpu's bit in map is set
47 */
48 u8 vectors[KVM_MAX_VCPU_IDS];
49 };
50
51
52 struct rtc_status {
53 int pending_eoi;
54 struct dest_map dest_map;
55 };
56
57 union kvm_ioapic_redirect_entry {
58 u64 bits;
59 struct {
60 u8 vector;
61 u8 delivery_mode:3;
62 u8 dest_mode:1;
63 u8 delivery_status:1;
64 u8 polarity:1;
65 u8 remote_irr:1;
66 u8 trig_mode:1;
67 u8 mask:1;
68 u8 reserve:7;
69 u8 reserved[4];
70 u8 dest_id;
71 } fields;
72 };
73
74 struct kvm_ioapic {
75 u64 base_address;
76 u32 ioregsel;
77 u32 id;
78 u32 irr;
79 u32 pad;
80 union kvm_ioapic_redirect_entry redirtbl[IOAPIC_NUM_PINS];
81 unsigned long irq_states[IOAPIC_NUM_PINS];
82 struct kvm_io_device dev;
83 struct kvm *kvm;
84 spinlock_t lock;
85 struct rtc_status rtc_status;
86 struct delayed_work eoi_inject;
87 u32 irq_eoi[IOAPIC_NUM_PINS];
88 u32 irr_delivered;
89 };
90
91 #ifdef DEBUG
92 #define ASSERT(x) \
93 do { \
94 if (!(x)) { \
95 printk(KERN_EMERG "assertion failed %s: %d: %s\n", \
96 __FILE__, __LINE__, #x); \
97 BUG(); \
98 } \
99 } while (0)
100 #else
101 #define ASSERT(x) do { } while (0)
102 #endif
103
104 static inline int ioapic_in_kernel(struct kvm *kvm)
105 {
106 return irqchip_kernel(kvm);
107 }
108
109 void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu);
110 void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector,
111 int trigger_mode);
112 int kvm_ioapic_init(struct kvm *kvm);
113 void kvm_ioapic_destroy(struct kvm *kvm);
114 int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
115 int level, bool line_status);
116 void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);
117 void kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
118 void kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
119 void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu,
120 ulong *ioapic_handled_vectors);
121 void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
122 ulong *ioapic_handled_vectors);
123 #endif
124
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