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
7 #include <kvm/iodev.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 #ifdef CONFIG_X86
39 #define RTC_GSI 8
40 #else
41 #define RTC_GSI -1U
42 #endif
43
44 struct dest_map {
45 /* vcpu bitmap where IRQ has been sent */
46 DECLARE_BITMAP(map, KVM_MAX_VCPU_ID);
47
48 /*
49 * Vector sent to a given vcpu, only valid when
50 * the vcpu's bit in map is set
51 */
52 u8 vectors[KVM_MAX_VCPU_ID];
53 };
54
55
56 struct rtc_status {
57 int pending_eoi;
58 struct dest_map dest_map;
59 };
60
61 union kvm_ioapic_redirect_entry {
62 u64 bits;
63 struct {
64 u8 vector;
65 u8 delivery_mode:3;
66 u8 dest_mode:1;
67 u8 delivery_status:1;
68 u8 polarity:1;
69 u8 remote_irr:1;
70 u8 trig_mode:1;
71 u8 mask:1;
72 u8 reserve:7;
73 u8 reserved[4];
74 u8 dest_id;
75 } fields;
76 };
77
78 struct kvm_ioapic {
79 u64 base_address;
80 u32 ioregsel;
81 u32 id;
82 u32 irr;
83 u32 pad;
84 union kvm_ioapic_redirect_entry redirtbl[IOAPIC_NUM_PINS];
85 unsigned long irq_states[IOAPIC_NUM_PINS];
86 struct kvm_io_device dev;
87 struct kvm *kvm;
88 void (*ack_notifier)(void *opaque, int irq);
89 spinlock_t lock;
90 struct rtc_status rtc_status;
91 struct delayed_work eoi_inject;
92 u32 irq_eoi[IOAPIC_NUM_PINS];
93 u32 irr_delivered;
94 };
95
96 #ifdef DEBUG
97 #define ASSERT(x) \
98 do { \
99 if (!(x)) { \
100 printk(KERN_EMERG "assertion failed %s: %d: %s\n", \
101 __FILE__, __LINE__, #x); \
102 BUG(); \
103 } \
104 } while (0)
105 #else
106 #define ASSERT(x) do { } while (0)
107 #endif
108
ioapic_in_kernel(struct kvm * kvm)109 static inline int ioapic_in_kernel(struct kvm *kvm)
110 {
111 int mode = kvm->arch.irqchip_mode;
112
113 /* Matches smp_wmb() when setting irqchip_mode */
114 smp_rmb();
115 return mode == KVM_IRQCHIP_KERNEL;
116 }
117
118 void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu);
119 bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
120 int short_hand, unsigned int dest, int dest_mode);
121 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
122 void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector,
123 int trigger_mode);
124 int kvm_ioapic_init(struct kvm *kvm);
125 void kvm_ioapic_destroy(struct kvm *kvm);
126 int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
127 int level, bool line_status);
128 void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);
129 int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
130 struct kvm_lapic_irq *irq,
131 struct dest_map *dest_map);
132 void kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
133 void kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
134 void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu,
135 ulong *ioapic_handled_vectors);
136 void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
137 ulong *ioapic_handled_vectors);
138 #endif
139
