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192.168.1.100 / T800 / feb6f202200107c1997957b0cdcd1f83784dba9d / . / src / kernel / linux / v4.19 / arch / x86 / kvm / ioapic.h
blob: ea1a4e0297dae117832e19e44079e031b7fd5a94 [file] [log] [blame]
xjb04a4022021-11-25 15:01:52 +0800[diff] [blame]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
9struct kvm;
10struct 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
44struct 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
56struct rtc_status {
57 int pending_eoi;
58 struct dest_map dest_map;
59};
60
61union 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
78struct 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) \
98do { \
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
109static 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
118void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu);
119bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
120 int short_hand, unsigned int dest, int dest_mode);
121int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
122void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector,
123 int trigger_mode);
124int kvm_ioapic_init(struct kvm *kvm);
125void kvm_ioapic_destroy(struct kvm *kvm);
126int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
127 int level, bool line_status);
128void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);
129int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
130 struct kvm_lapic_irq *irq,
131 struct dest_map *dest_map);
132void kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
133void kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
134void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu,
135 ulong *ioapic_handled_vectors);
136void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
137 ulong *ioapic_handled_vectors);
138#endif