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lapic.h
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1 #ifndef __KVM_X86_LAPIC_H
2 #define __KVM_X86_LAPIC_H
3 
4 #include "iodev.h"
5 
6 #include <linux/kvm_host.h>
7 
8 struct kvm_timer {
9  struct hrtimer timer;
10  s64 period; /* unit: ns */
11  u32 timer_mode_mask;
12  u64 tscdeadline;
13  atomic_t pending; /* accumulated triggered timers */
14 };
15 
16 struct kvm_lapic {
17  unsigned long base_address;
18  struct kvm_io_device dev;
19  struct kvm_timer lapic_timer;
20  u32 divide_count;
21  struct kvm_vcpu *vcpu;
22  bool irr_pending;
23  /* Number of bits set in ISR. */
24  s16 isr_count;
25  /* The highest vector set in ISR; if -1 - invalid, must scan ISR. */
26  int highest_isr_cache;
32  void *regs;
33  gpa_t vapic_addr;
34  struct page *vapic_page;
35 };
36 int kvm_create_lapic(struct kvm_vcpu *vcpu);
37 void kvm_free_lapic(struct kvm_vcpu *vcpu);
38 
39 int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu);
40 int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu);
41 int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu);
42 void kvm_lapic_reset(struct kvm_vcpu *vcpu);
43 u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu);
44 void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8);
45 void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu);
46 void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value);
47 u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu);
48 void kvm_apic_set_version(struct kvm_vcpu *vcpu);
49 
50 int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest);
51 int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda);
52 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq);
53 int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type);
54 
55 bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
56  struct kvm_lapic_irq *irq, int *r);
57 
58 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu);
59 void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data);
60 void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu,
61  struct kvm_lapic_state *s);
62 int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu);
63 
64 u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu);
65 void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data);
66 
67 void kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr);
68 void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu);
69 void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu);
70 
71 int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
72 int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
73 
74 int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
75 int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
76 
77 static inline bool kvm_hv_vapic_assist_page_enabled(struct kvm_vcpu *vcpu)
78 {
79  return vcpu->arch.hv_vapic & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE;
80 }
81 
82 int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data);
83 void kvm_lapic_init(void);
84 
85 static inline u32 kvm_apic_get_reg(struct kvm_lapic *apic, int reg_off)
86 {
87  return *((u32 *) (apic->regs + reg_off));
88 }
89 
90 extern struct static_key kvm_no_apic_vcpu;
91 
92 static inline bool kvm_vcpu_has_lapic(struct kvm_vcpu *vcpu)
93 {
94  if (static_key_false(&kvm_no_apic_vcpu))
95  return vcpu->arch.apic;
96  return true;
97 }
98 
99 extern struct static_key_deferred apic_hw_disabled;
100 
101 static inline int kvm_apic_hw_enabled(struct kvm_lapic *apic)
102 {
103  if (static_key_false(&apic_hw_disabled.key))
104  return apic->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE;
105  return MSR_IA32_APICBASE_ENABLE;
106 }
107 
108 extern struct static_key_deferred apic_sw_disabled;
109 
110 static inline int kvm_apic_sw_enabled(struct kvm_lapic *apic)
111 {
112  if (static_key_false(&apic_sw_disabled.key))
113  return kvm_apic_get_reg(apic, APIC_SPIV) & APIC_SPIV_APIC_ENABLED;
114  return APIC_SPIV_APIC_ENABLED;
115 }
116 
117 static inline bool kvm_apic_present(struct kvm_vcpu *vcpu)
118 {
119  return kvm_vcpu_has_lapic(vcpu) && kvm_apic_hw_enabled(vcpu->arch.apic);
120 }
121 
122 static inline int kvm_lapic_enabled(struct kvm_vcpu *vcpu)
123 {
124  return kvm_apic_present(vcpu) && kvm_apic_sw_enabled(vcpu->arch.apic);
125 }
126 
127 #endif
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