GNU Linux-libre 4.14.266-gnu1
[releases.git] / arch / x86 / kvm / ioapic.h
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
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