• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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