xref: /openbmc/linux/arch/x86/kvm/ioapic.h (revision 4f205687)
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 dest_map {
44 	/* vcpu bitmap where IRQ has been sent */
45 	DECLARE_BITMAP(map, KVM_MAX_VCPUS);
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_VCPUS];
52 };
53 
54 
55 struct rtc_status {
56 	int pending_eoi;
57 	struct dest_map dest_map;
58 };
59 
60 union kvm_ioapic_redirect_entry {
61 	u64 bits;
62 	struct {
63 		u8 vector;
64 		u8 delivery_mode:3;
65 		u8 dest_mode:1;
66 		u8 delivery_status:1;
67 		u8 polarity:1;
68 		u8 remote_irr:1;
69 		u8 trig_mode:1;
70 		u8 mask:1;
71 		u8 reserve:7;
72 		u8 reserved[4];
73 		u8 dest_id;
74 	} fields;
75 };
76 
77 struct kvm_ioapic {
78 	u64 base_address;
79 	u32 ioregsel;
80 	u32 id;
81 	u32 irr;
82 	u32 pad;
83 	union kvm_ioapic_redirect_entry redirtbl[IOAPIC_NUM_PINS];
84 	unsigned long irq_states[IOAPIC_NUM_PINS];
85 	struct kvm_io_device dev;
86 	struct kvm *kvm;
87 	void (*ack_notifier)(void *opaque, int irq);
88 	spinlock_t lock;
89 	struct rtc_status rtc_status;
90 	struct delayed_work eoi_inject;
91 	u32 irq_eoi[IOAPIC_NUM_PINS];
92 	u32 irr_delivered;
93 };
94 
95 #ifdef DEBUG
96 #define ASSERT(x)  							\
97 do {									\
98 	if (!(x)) {							\
99 		printk(KERN_EMERG "assertion failed %s: %d: %s\n",	\
100 		       __FILE__, __LINE__, #x);				\
101 		BUG();							\
102 	}								\
103 } while (0)
104 #else
105 #define ASSERT(x) do { } while (0)
106 #endif
107 
108 static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm)
109 {
110 	return kvm->arch.vioapic;
111 }
112 
113 static inline int ioapic_in_kernel(struct kvm *kvm)
114 {
115 	int ret;
116 
117 	ret = (ioapic_irqchip(kvm) != NULL);
118 	return ret;
119 }
120 
121 void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu);
122 bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
123 		int short_hand, unsigned int dest, int dest_mode);
124 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
125 void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector,
126 			int trigger_mode);
127 int kvm_ioapic_init(struct kvm *kvm);
128 void kvm_ioapic_destroy(struct kvm *kvm);
129 int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
130 		       int level, bool line_status);
131 void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);
132 int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
133 			     struct kvm_lapic_irq *irq,
134 			     struct dest_map *dest_map);
135 int kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
136 int kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
137 void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu,
138 			   ulong *ioapic_handled_vectors);
139 void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
140 			    ulong *ioapic_handled_vectors);
141 #endif
142