1 #ifndef __KVM_X86_LAPIC_H
2 #define __KVM_X86_LAPIC_H
6 #include <linux/kvm_host.h>
8 #define KVM_APIC_INIT 0
9 #define KVM_APIC_SIPI 1
10 #define KVM_APIC_LVT_NUM 6
12 #define KVM_APIC_SHORT_MASK 0xc0000
13 #define KVM_APIC_DEST_MASK 0x800
15 #define APIC_BUS_CYCLE_NS 1
16 #define APIC_BUS_FREQUENCY (1000000000ULL / APIC_BUS_CYCLE_NS)
20 s64 period; /* unit: ns */
21 ktime_t target_expiration;
25 u64 expired_tscdeadline;
26 atomic_t pending; /* accumulated triggered timers */
31 unsigned long base_address;
32 struct kvm_io_device dev;
33 struct kvm_timer lapic_timer;
35 struct kvm_vcpu *vcpu;
38 bool lvt0_in_nmi_mode;
39 /* Number of bits set in ISR. */
41 /* The highest vector set in ISR; if -1 - invalid, must scan ISR. */
42 int highest_isr_cache;
44 * APIC register page. The layout matches the register layout seen by
45 * the guest 1:1, because it is accessed by the vmx microcode.
46 * Note: Only one register, the TPR, is used by the microcode.
50 struct gfn_to_hva_cache vapic_cache;
51 unsigned long pending_events;
52 unsigned int sipi_vector;
57 int kvm_create_lapic(struct kvm_vcpu *vcpu);
58 void kvm_free_lapic(struct kvm_vcpu *vcpu);
60 int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu);
61 int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu);
62 int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu);
63 void kvm_apic_accept_events(struct kvm_vcpu *vcpu);
64 void kvm_lapic_reset(struct kvm_vcpu *vcpu, bool init_event);
65 u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu);
66 void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8);
67 void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu);
68 void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value);
69 u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu);
70 void kvm_apic_set_version(struct kvm_vcpu *vcpu);
71 int kvm_lapic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val);
72 int kvm_lapic_reg_read(struct kvm_lapic *apic, u32 offset, int len,
74 bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
75 int short_hand, unsigned int dest, int dest_mode);
77 int __kvm_apic_update_irr(u32 *pir, void *regs);
78 int kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir);
79 void kvm_apic_update_ppr(struct kvm_vcpu *vcpu);
80 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq,
81 struct dest_map *dest_map);
82 int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type);
84 bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
85 struct kvm_lapic_irq *irq, int *r, struct dest_map *dest_map);
87 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu);
88 int kvm_set_apic_base(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
89 int kvm_apic_get_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s);
90 int kvm_apic_set_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s);
91 int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu);
93 u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu);
94 void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data);
96 void kvm_apic_write_nodecode(struct kvm_vcpu *vcpu, u32 offset);
97 void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector);
99 int kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr);
100 void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu);
101 void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu);
103 int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
104 int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
106 int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
107 int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
109 static inline bool kvm_hv_vapic_assist_page_enabled(struct kvm_vcpu *vcpu)
111 return vcpu->arch.hyperv.hv_vapic & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE;
114 int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data);
115 void kvm_lapic_init(void);
116 void kvm_lapic_exit(void);
118 #define VEC_POS(v) ((v) & (32 - 1))
119 #define REG_POS(v) (((v) >> 5) << 4)
121 static inline void kvm_lapic_set_vector(int vec, void *bitmap)
123 set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec));
126 static inline void kvm_lapic_set_irr(int vec, struct kvm_lapic *apic)
128 kvm_lapic_set_vector(vec, apic->regs + APIC_IRR);
130 * irr_pending must be true if any interrupt is pending; set it after
131 * APIC_IRR to avoid race with apic_clear_irr
133 apic->irr_pending = true;
136 static inline u32 kvm_lapic_get_reg(struct kvm_lapic *apic, int reg_off)
138 return *((u32 *) (apic->regs + reg_off));
141 static inline void kvm_lapic_set_reg(struct kvm_lapic *apic, int reg_off, u32 val)
143 *((u32 *) (apic->regs + reg_off)) = val;
146 extern struct static_key kvm_no_apic_vcpu;
148 static inline bool lapic_in_kernel(struct kvm_vcpu *vcpu)
150 if (static_key_false(&kvm_no_apic_vcpu))
151 return vcpu->arch.apic;
155 extern struct static_key_deferred apic_hw_disabled;
157 static inline int kvm_apic_hw_enabled(struct kvm_lapic *apic)
159 if (static_key_false(&apic_hw_disabled.key))
160 return apic->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE;
161 return MSR_IA32_APICBASE_ENABLE;
164 extern struct static_key_deferred apic_sw_disabled;
166 static inline bool kvm_apic_sw_enabled(struct kvm_lapic *apic)
168 if (static_key_false(&apic_sw_disabled.key))
169 return apic->sw_enabled;
173 static inline bool kvm_apic_present(struct kvm_vcpu *vcpu)
175 return lapic_in_kernel(vcpu) && kvm_apic_hw_enabled(vcpu->arch.apic);
178 static inline int kvm_lapic_enabled(struct kvm_vcpu *vcpu)
180 return kvm_apic_present(vcpu) && kvm_apic_sw_enabled(vcpu->arch.apic);
183 static inline int apic_x2apic_mode(struct kvm_lapic *apic)
185 return apic->vcpu->arch.apic_base & X2APIC_ENABLE;
188 static inline bool kvm_vcpu_apicv_active(struct kvm_vcpu *vcpu)
190 return vcpu->arch.apic && vcpu->arch.apicv_active;
193 static inline bool kvm_apic_has_events(struct kvm_vcpu *vcpu)
195 return lapic_in_kernel(vcpu) && vcpu->arch.apic->pending_events;
198 static inline bool kvm_lowest_prio_delivery(struct kvm_lapic_irq *irq)
200 return (irq->delivery_mode == APIC_DM_LOWEST ||
201 irq->msi_redir_hint);
204 static inline int kvm_lapic_latched_init(struct kvm_vcpu *vcpu)
206 return lapic_in_kernel(vcpu) && test_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events);
209 bool kvm_apic_pending_eoi(struct kvm_vcpu *vcpu, int vector);
211 void wait_lapic_expire(struct kvm_vcpu *vcpu);
213 bool kvm_intr_is_single_vcpu_fast(struct kvm *kvm, struct kvm_lapic_irq *irq,
214 struct kvm_vcpu **dest_vcpu);
215 int kvm_vector_to_index(u32 vector, u32 dest_vcpus,
216 const unsigned long *bitmap, u32 bitmap_size);
217 void kvm_lapic_switch_to_sw_timer(struct kvm_vcpu *vcpu);
218 void kvm_lapic_switch_to_hv_timer(struct kvm_vcpu *vcpu);
219 void kvm_lapic_expired_hv_timer(struct kvm_vcpu *vcpu);
220 bool kvm_lapic_hv_timer_in_use(struct kvm_vcpu *vcpu);
221 void kvm_lapic_restart_hv_timer(struct kvm_vcpu *vcpu);