1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __KVM_X86_LAPIC_H
3 #define __KVM_X86_LAPIC_H
4
5 #include <kvm/iodev.h>
6
7 #include <asm/apic.h>
8
9 #include <linux/kvm_host.h>
10
11 #include "hyperv.h"
12 #include "smm.h"
13
14 #define KVM_APIC_INIT 0
15 #define KVM_APIC_SIPI 1
16
17 #define APIC_SHORT_MASK 0xc0000
18 #define APIC_DEST_NOSHORT 0x0
19 #define APIC_DEST_MASK 0x800
20
21 #define APIC_BUS_CYCLE_NS_DEFAULT 1
22
23 #define APIC_BROADCAST 0xFF
24 #define X2APIC_BROADCAST 0xFFFFFFFFul
25
26 #define X2APIC_MSR(r) (APIC_BASE_MSR + ((r) >> 4))
27
28 enum lapic_mode {
29 LAPIC_MODE_DISABLED = 0,
30 LAPIC_MODE_INVALID = X2APIC_ENABLE,
31 LAPIC_MODE_XAPIC = MSR_IA32_APICBASE_ENABLE,
32 LAPIC_MODE_X2APIC = MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE,
33 };
34
35 enum lapic_lvt_entry {
36 LVT_TIMER,
37 LVT_THERMAL_MONITOR,
38 LVT_PERFORMANCE_COUNTER,
39 LVT_LINT0,
40 LVT_LINT1,
41 LVT_ERROR,
42 LVT_CMCI,
43
44 KVM_APIC_MAX_NR_LVT_ENTRIES,
45 };
46
47 #define APIC_LVTx(x) ((x) == LVT_CMCI ? APIC_LVTCMCI : APIC_LVTT + 0x10 * (x))
48
49 struct kvm_timer {
50 struct hrtimer timer;
51 s64 period; /* unit: ns */
52 ktime_t target_expiration;
53 u32 timer_mode;
54 u32 timer_mode_mask;
55 u64 tscdeadline;
56 u64 expired_tscdeadline;
57 u32 timer_advance_ns;
58 atomic_t pending; /* accumulated triggered timers */
59 bool hv_timer_in_use;
60 };
61
62 struct kvm_lapic {
63 unsigned long base_address;
64 struct kvm_io_device dev;
65 struct kvm_timer lapic_timer;
66 u32 divide_count;
67 struct kvm_vcpu *vcpu;
68 bool apicv_active;
69 bool sw_enabled;
70 bool irr_pending;
71 bool lvt0_in_nmi_mode;
72 /* Select registers in the vAPIC cannot be read/written. */
73 bool guest_apic_protected;
74 /* Number of bits set in ISR. */
75 s16 isr_count;
76 /* The highest vector set in ISR; if -1 - invalid, must scan ISR. */
77 int highest_isr_cache;
78 /**
79 * APIC register page. The layout matches the register layout seen by
80 * the guest 1:1, because it is accessed by the vmx microcode.
81 * Note: Only one register, the TPR, is used by the microcode.
82 */
83 void *regs;
84 gpa_t vapic_addr;
85 struct gfn_to_hva_cache vapic_cache;
86 unsigned long pending_events;
87 unsigned int sipi_vector;
88 int nr_lvt_entries;
89 };
90
91 struct dest_map;
92
93 int kvm_create_lapic(struct kvm_vcpu *vcpu);
94 void kvm_free_lapic(struct kvm_vcpu *vcpu);
95
96 int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu);
97 void kvm_apic_ack_interrupt(struct kvm_vcpu *vcpu, int vector);
98 int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu);
99 int kvm_apic_accept_events(struct kvm_vcpu *vcpu);
100 void kvm_lapic_reset(struct kvm_vcpu *vcpu, bool init_event);
101 u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu);
102 void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8);
103 void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu);
104 void kvm_apic_set_version(struct kvm_vcpu *vcpu);
105 void kvm_apic_after_set_mcg_cap(struct kvm_vcpu *vcpu);
106 bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
107 int shorthand, unsigned int dest, int dest_mode);
108 void kvm_apic_clear_irr(struct kvm_vcpu *vcpu, int vec);
109 bool __kvm_apic_update_irr(unsigned long *pir, void *regs, int *max_irr);
110 bool kvm_apic_update_irr(struct kvm_vcpu *vcpu, unsigned long *pir, int *max_irr);
111 void kvm_apic_update_ppr(struct kvm_vcpu *vcpu);
112 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq,
113 struct dest_map *dest_map);
114 int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type);
115 void kvm_apic_update_apicv(struct kvm_vcpu *vcpu);
116 int kvm_alloc_apic_access_page(struct kvm *kvm);
117 void kvm_inhibit_apic_access_page(struct kvm_vcpu *vcpu);
118
119 bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
120 struct kvm_lapic_irq *irq, int *r, struct dest_map *dest_map);
121 int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
122 struct kvm_lapic_irq *irq,
123 struct dest_map *dest_map);
124 void kvm_apic_send_ipi(struct kvm_lapic *apic, u32 icr_low, u32 icr_high);
125
126 int kvm_apic_set_base(struct kvm_vcpu *vcpu, u64 value, bool host_initiated);
127 int kvm_apic_get_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s);
128 int kvm_apic_set_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s);
129 void kvm_apic_update_hwapic_isr(struct kvm_vcpu *vcpu);
130 int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu);
131
132 u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu);
133 void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data);
134
135 void kvm_apic_write_nodecode(struct kvm_vcpu *vcpu, u32 offset);
136 void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector);
137
138 int kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr);
139 void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu);
140 void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu);
141
142 int kvm_x2apic_icr_write_fast(struct kvm_lapic *apic, u64 data);
143 int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
144 int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
145
146 int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
147 int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
148
149 int kvm_lapic_set_pv_eoi(struct kvm_vcpu *vcpu, u64 data, unsigned long len);
150 void kvm_lapic_exit(void);
151
152 u64 kvm_lapic_readable_reg_mask(struct kvm_lapic *apic);
153
kvm_lapic_set_irr(int vec,struct kvm_lapic * apic)154 static inline void kvm_lapic_set_irr(int vec, struct kvm_lapic *apic)
155 {
156 apic_set_vector(vec, apic->regs + APIC_IRR);
157 /*
158 * irr_pending must be true if any interrupt is pending; set it after
159 * APIC_IRR to avoid race with apic_clear_irr
160 */
161 apic->irr_pending = true;
162 }
163
kvm_lapic_get_reg(struct kvm_lapic * apic,int reg_off)164 static inline u32 kvm_lapic_get_reg(struct kvm_lapic *apic, int reg_off)
165 {
166 return apic_get_reg(apic->regs, reg_off);
167 }
168
169 DECLARE_STATIC_KEY_FALSE(kvm_has_noapic_vcpu);
170
lapic_in_kernel(struct kvm_vcpu * vcpu)171 static inline bool lapic_in_kernel(struct kvm_vcpu *vcpu)
172 {
173 if (static_branch_unlikely(&kvm_has_noapic_vcpu))
174 return vcpu->arch.apic;
175 return true;
176 }
177
178 extern struct static_key_false_deferred apic_hw_disabled;
179
kvm_apic_hw_enabled(struct kvm_lapic * apic)180 static inline bool kvm_apic_hw_enabled(struct kvm_lapic *apic)
181 {
182 if (static_branch_unlikely(&apic_hw_disabled.key))
183 return apic->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE;
184 return true;
185 }
186
187 extern struct static_key_false_deferred apic_sw_disabled;
188
kvm_apic_sw_enabled(struct kvm_lapic * apic)189 static inline bool kvm_apic_sw_enabled(struct kvm_lapic *apic)
190 {
191 if (static_branch_unlikely(&apic_sw_disabled.key))
192 return apic->sw_enabled;
193 return true;
194 }
195
kvm_apic_present(struct kvm_vcpu * vcpu)196 static inline bool kvm_apic_present(struct kvm_vcpu *vcpu)
197 {
198 return lapic_in_kernel(vcpu) && kvm_apic_hw_enabled(vcpu->arch.apic);
199 }
200
kvm_lapic_enabled(struct kvm_vcpu * vcpu)201 static inline int kvm_lapic_enabled(struct kvm_vcpu *vcpu)
202 {
203 return kvm_apic_present(vcpu) && kvm_apic_sw_enabled(vcpu->arch.apic);
204 }
205
apic_x2apic_mode(struct kvm_lapic * apic)206 static inline int apic_x2apic_mode(struct kvm_lapic *apic)
207 {
208 return apic->vcpu->arch.apic_base & X2APIC_ENABLE;
209 }
210
kvm_vcpu_apicv_active(struct kvm_vcpu * vcpu)211 static inline bool kvm_vcpu_apicv_active(struct kvm_vcpu *vcpu)
212 {
213 return lapic_in_kernel(vcpu) && vcpu->arch.apic->apicv_active;
214 }
215
kvm_apic_has_pending_init_or_sipi(struct kvm_vcpu * vcpu)216 static inline bool kvm_apic_has_pending_init_or_sipi(struct kvm_vcpu *vcpu)
217 {
218 return lapic_in_kernel(vcpu) && vcpu->arch.apic->pending_events;
219 }
220
kvm_apic_init_sipi_allowed(struct kvm_vcpu * vcpu)221 static inline bool kvm_apic_init_sipi_allowed(struct kvm_vcpu *vcpu)
222 {
223 return !is_smm(vcpu) &&
224 !kvm_x86_call(apic_init_signal_blocked)(vcpu);
225 }
226
kvm_lapic_latched_init(struct kvm_vcpu * vcpu)227 static inline int kvm_lapic_latched_init(struct kvm_vcpu *vcpu)
228 {
229 return lapic_in_kernel(vcpu) && test_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events);
230 }
231
232 bool kvm_apic_pending_eoi(struct kvm_vcpu *vcpu, int vector);
233
234 void kvm_wait_lapic_expire(struct kvm_vcpu *vcpu);
235
236 void kvm_bitmap_or_dest_vcpus(struct kvm *kvm, struct kvm_lapic_irq *irq,
237 unsigned long *vcpu_bitmap);
238
239 bool kvm_intr_is_single_vcpu(struct kvm *kvm, struct kvm_lapic_irq *irq,
240 struct kvm_vcpu **dest_vcpu);
241 void kvm_lapic_switch_to_sw_timer(struct kvm_vcpu *vcpu);
242 void kvm_lapic_switch_to_hv_timer(struct kvm_vcpu *vcpu);
243 void kvm_lapic_expired_hv_timer(struct kvm_vcpu *vcpu);
244 bool kvm_lapic_hv_timer_in_use(struct kvm_vcpu *vcpu);
245 void kvm_lapic_restart_hv_timer(struct kvm_vcpu *vcpu);
246
kvm_apic_mode(u64 apic_base)247 static inline enum lapic_mode kvm_apic_mode(u64 apic_base)
248 {
249 return apic_base & (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE);
250 }
251
kvm_get_apic_mode(struct kvm_vcpu * vcpu)252 static inline enum lapic_mode kvm_get_apic_mode(struct kvm_vcpu *vcpu)
253 {
254 return kvm_apic_mode(vcpu->arch.apic_base);
255 }
256
kvm_xapic_id(struct kvm_lapic * apic)257 static inline u8 kvm_xapic_id(struct kvm_lapic *apic)
258 {
259 return kvm_lapic_get_reg(apic, APIC_ID) >> 24;
260 }
261
262 #endif
263