1 #ifndef __KVM_IO_APIC_H
2 #define __KVM_IO_APIC_H
3
4 #include <linux/kvm_host.h>
5
6 #include <kvm/iodev.h>
7
8 struct kvm;
9 struct kvm_vcpu;
10
11 #define IOAPIC_NUM_PINS KVM_IOAPIC_NUM_PINS
12 #define MAX_NR_RESERVED_IOAPIC_PINS KVM_MAX_IRQ_ROUTES
13 #define IOAPIC_VERSION_ID 0x11 /* IOAPIC version */
14 #define IOAPIC_EDGE_TRIG 0
15 #define IOAPIC_LEVEL_TRIG 1
16
17 #define IOAPIC_DEFAULT_BASE_ADDRESS 0xfec00000
18 #define IOAPIC_MEM_LENGTH 0x100
19
20 /* Direct registers. */
21 #define IOAPIC_REG_SELECT 0x00
22 #define IOAPIC_REG_WINDOW 0x10
23
24 /* Indirect registers. */
25 #define IOAPIC_REG_APIC_ID 0x00 /* x86 IOAPIC only */
26 #define IOAPIC_REG_VERSION 0x01
27 #define IOAPIC_REG_ARB_ID 0x02 /* x86 IOAPIC only */
28
29 /*ioapic delivery mode*/
30 #define IOAPIC_FIXED 0x0
31 #define IOAPIC_LOWEST_PRIORITY 0x1
32 #define IOAPIC_PMI 0x2
33 #define IOAPIC_NMI 0x4
34 #define IOAPIC_INIT 0x5
35 #define IOAPIC_EXTINT 0x7
36
37 #ifdef CONFIG_X86
38 #define RTC_GSI 8
39 #else
40 #define RTC_GSI -1U
41 #endif
42
43 struct rtc_status {
44 int pending_eoi;
45 DECLARE_BITMAP(dest_map, KVM_MAX_VCPUS);
46 };
47
48 union kvm_ioapic_redirect_entry {
49 u64 bits;
50 struct {
51 u8 vector;
52 u8 delivery_mode:3;
53 u8 dest_mode:1;
54 u8 delivery_status:1;
55 u8 polarity:1;
56 u8 remote_irr:1;
57 u8 trig_mode:1;
58 u8 mask:1;
59 u8 reserve:7;
60 u8 reserved[4];
61 u8 dest_id;
62 } fields;
63 };
64
65 struct kvm_ioapic {
66 u64 base_address;
67 u32 ioregsel;
68 u32 id;
69 u32 irr;
70 u32 pad;
71 union kvm_ioapic_redirect_entry redirtbl[IOAPIC_NUM_PINS];
72 unsigned long irq_states[IOAPIC_NUM_PINS];
73 struct kvm_io_device dev;
74 struct kvm *kvm;
75 void (*ack_notifier)(void *opaque, int irq);
76 spinlock_t lock;
77 struct rtc_status rtc_status;
78 struct delayed_work eoi_inject;
79 u32 irq_eoi[IOAPIC_NUM_PINS];
80 u32 irr_delivered;
81 };
82
83 #ifdef DEBUG
84 #define ASSERT(x) \
85 do { \
86 if (!(x)) { \
87 printk(KERN_EMERG "assertion failed %s: %d: %s\n", \
88 __FILE__, __LINE__, #x); \
89 BUG(); \
90 } \
91 } while (0)
92 #else
93 #define ASSERT(x) do { } while (0)
94 #endif
95
ioapic_irqchip(struct kvm * kvm)96 static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm)
97 {
98 return kvm->arch.vioapic;
99 }
100
ioapic_in_kernel(struct kvm * kvm)101 static inline int ioapic_in_kernel(struct kvm *kvm)
102 {
103 int ret;
104
105 ret = (ioapic_irqchip(kvm) != NULL);
106 return ret;
107 }
108
109 void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu);
110 bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
111 int short_hand, unsigned int dest, int dest_mode);
112 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
113 void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector,
114 int trigger_mode);
115 int kvm_ioapic_init(struct kvm *kvm);
116 void kvm_ioapic_destroy(struct kvm *kvm);
117 int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
118 int level, bool line_status);
119 void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);
120 int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
121 struct kvm_lapic_irq *irq, unsigned long *dest_map);
122 int kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
123 int kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
124 void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap);
125 void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap);
126
127 #endif
128