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 <linux/kvm_host.h>
8
9 #include "hyperv.h"
10 #include "smm.h"
11
12 #define KVM_APIC_INIT 0
13 #define KVM_APIC_SIPI 1
14
15 #define APIC_SHORT_MASK 0xc0000
16 #define APIC_DEST_NOSHORT 0x0
17 #define APIC_DEST_MASK 0x800
18
19 #define APIC_BUS_CYCLE_NS_DEFAULT 1
20
21 #define APIC_BROADCAST 0xFF
22 #define X2APIC_BROADCAST 0xFFFFFFFFul
23
24 enum lapic_mode {
25 LAPIC_MODE_DISABLED = 0,
26 LAPIC_MODE_INVALID = X2APIC_ENABLE,
27 LAPIC_MODE_XAPIC = MSR_IA32_APICBASE_ENABLE,
28 LAPIC_MODE_X2APIC = MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE,
29 };
30
31 enum lapic_lvt_entry {
32 LVT_TIMER,
33 LVT_THERMAL_MONITOR,
34 LVT_PERFORMANCE_COUNTER,
35 LVT_LINT0,
36 LVT_LINT1,
37 LVT_ERROR,
38 LVT_CMCI,
39
40 KVM_APIC_MAX_NR_LVT_ENTRIES,
41 };
42
43 #define APIC_LVTx(x) ((x) == LVT_CMCI ? APIC_LVTCMCI : APIC_LVTT + 0x10 * (x))
44
45 struct kvm_timer {
46 struct hrtimer timer;
47 s64 period; /* unit: ns */
48 ktime_t target_expiration;
49 u32 timer_mode;
50 u32 timer_mode_mask;
51 u64 tscdeadline;
52 u64 expired_tscdeadline;
53 u32 timer_advance_ns;
54 atomic_t pending; /* accumulated triggered timers */
55 bool hv_timer_in_use;
56 };
57
58 struct kvm_lapic {
59 unsigned long base_address;
60 struct kvm_io_device dev;
61 struct kvm_timer lapic_timer;
62 u32 divide_count;
63 struct kvm_vcpu *vcpu;
64 bool apicv_active;
65 bool sw_enabled;
66 bool irr_pending;
67 bool lvt0_in_nmi_mode;
68 /* Number of bits set in ISR. */
69 s16 isr_count;
70 /* The highest vector set in ISR; if -1 - invalid, must scan ISR. */
71 int highest_isr_cache;
72 /**
73 * APIC register page. The layout matches the register layout seen by
74 * the guest 1:1, because it is accessed by the vmx microcode.
75 * Note: Only one register, the TPR, is used by the microcode.
76 */
77 void *regs;
78 gpa_t vapic_addr;
79 struct gfn_to_hva_cache vapic_cache;
80 unsigned long pending_events;
81 unsigned int sipi_vector;
82 int nr_lvt_entries;
83 };
84
85 struct dest_map;
86
87 int kvm_create_lapic(struct kvm_vcpu *vcpu);
88 void kvm_free_lapic(struct kvm_vcpu *vcpu);
89
90 int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu);
91 int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu);
92 int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu);
93 int kvm_apic_accept_events(struct kvm_vcpu *vcpu);
94 void kvm_lapic_reset(struct kvm_vcpu *vcpu, bool init_event);
95 u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu);
96 void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8);
97 void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu);
98 void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value);
99 u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu);
100 void kvm_recalculate_apic_map(struct kvm *kvm);
101 void kvm_apic_set_version(struct kvm_vcpu *vcpu);
102 void kvm_apic_after_set_mcg_cap(struct kvm_vcpu *vcpu);
103 bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
104 int shorthand, unsigned int dest, int dest_mode);
105 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
106 void kvm_apic_clear_irr(struct kvm_vcpu *vcpu, int vec);
107 bool __kvm_apic_update_irr(u32 *pir, void *regs, int *max_irr);
108 bool kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir, int *max_irr);
109 void kvm_apic_update_ppr(struct kvm_vcpu *vcpu);
110 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq,
111 struct dest_map *dest_map);
112 int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type);
113 void kvm_apic_update_apicv(struct kvm_vcpu *vcpu);
114 int kvm_alloc_apic_access_page(struct kvm *kvm);
115 void kvm_inhibit_apic_access_page(struct kvm_vcpu *vcpu);
116
117 bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
118 struct kvm_lapic_irq *irq, int *r, struct dest_map *dest_map);
119 void kvm_apic_send_ipi(struct kvm_lapic *apic, u32 icr_low, u32 icr_high);
120
121 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu);
122 int kvm_set_apic_base(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
123 int kvm_apic_get_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s);
124 int kvm_apic_set_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s);
125 enum lapic_mode kvm_get_apic_mode(struct kvm_vcpu *vcpu);
126 int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu);
127
128 u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu);
129 void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data);
130
131 void kvm_apic_write_nodecode(struct kvm_vcpu *vcpu, u32 offset);
132 void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector);
133
134 int kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr);
135 void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu);
136 void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu);
137
138 int kvm_x2apic_icr_write(struct kvm_lapic *apic, u64 data);
139 int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
140 int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
141
142 int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
143 int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
144
145 int kvm_lapic_set_pv_eoi(struct kvm_vcpu *vcpu, u64 data, unsigned long len);
146 void kvm_lapic_exit(void);
147
148 u64 kvm_lapic_readable_reg_mask(struct kvm_lapic *apic);
149
150 #define VEC_POS(v) ((v) & (32 - 1))
151 #define REG_POS(v) (((v) >> 5) << 4)
152
kvm_lapic_clear_vector(int vec,void * bitmap)153 static inline void kvm_lapic_clear_vector(int vec, void *bitmap)
154 {
155 clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec));
156 }
157
kvm_lapic_set_vector(int vec,void * bitmap)158 static inline void kvm_lapic_set_vector(int vec, void *bitmap)
159 {
160 set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec));
161 }
162
kvm_lapic_set_irr(int vec,struct kvm_lapic * apic)163 static inline void kvm_lapic_set_irr(int vec, struct kvm_lapic *apic)
164 {
165 kvm_lapic_set_vector(vec, apic->regs + APIC_IRR);
166 /*
167 * irr_pending must be true if any interrupt is pending; set it after
168 * APIC_IRR to avoid race with apic_clear_irr
169 */
170 apic->irr_pending = true;
171 }
172
__kvm_lapic_get_reg(char * regs,int reg_off)173 static inline u32 __kvm_lapic_get_reg(char *regs, int reg_off)
174 {
175 return *((u32 *) (regs + reg_off));
176 }
177
kvm_lapic_get_reg(struct kvm_lapic * apic,int reg_off)178 static inline u32 kvm_lapic_get_reg(struct kvm_lapic *apic, int reg_off)
179 {
180 return __kvm_lapic_get_reg(apic->regs, reg_off);
181 }
182
183 DECLARE_STATIC_KEY_FALSE(kvm_has_noapic_vcpu);
184
lapic_in_kernel(struct kvm_vcpu * vcpu)185 static inline bool lapic_in_kernel(struct kvm_vcpu *vcpu)
186 {
187 if (static_branch_unlikely(&kvm_has_noapic_vcpu))
188 return vcpu->arch.apic;
189 return true;
190 }
191
192 extern struct static_key_false_deferred apic_hw_disabled;
193
kvm_apic_hw_enabled(struct kvm_lapic * apic)194 static inline bool kvm_apic_hw_enabled(struct kvm_lapic *apic)
195 {
196 if (static_branch_unlikely(&apic_hw_disabled.key))
197 return apic->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE;
198 return true;
199 }
200
201 extern struct static_key_false_deferred apic_sw_disabled;
202
kvm_apic_sw_enabled(struct kvm_lapic * apic)203 static inline bool kvm_apic_sw_enabled(struct kvm_lapic *apic)
204 {
205 if (static_branch_unlikely(&apic_sw_disabled.key))
206 return apic->sw_enabled;
207 return true;
208 }
209
kvm_apic_present(struct kvm_vcpu * vcpu)210 static inline bool kvm_apic_present(struct kvm_vcpu *vcpu)
211 {
212 return lapic_in_kernel(vcpu) && kvm_apic_hw_enabled(vcpu->arch.apic);
213 }
214
kvm_lapic_enabled(struct kvm_vcpu * vcpu)215 static inline int kvm_lapic_enabled(struct kvm_vcpu *vcpu)
216 {
217 return kvm_apic_present(vcpu) && kvm_apic_sw_enabled(vcpu->arch.apic);
218 }
219
apic_x2apic_mode(struct kvm_lapic * apic)220 static inline int apic_x2apic_mode(struct kvm_lapic *apic)
221 {
222 return apic->vcpu->arch.apic_base & X2APIC_ENABLE;
223 }
224
kvm_vcpu_apicv_active(struct kvm_vcpu * vcpu)225 static inline bool kvm_vcpu_apicv_active(struct kvm_vcpu *vcpu)
226 {
227 return lapic_in_kernel(vcpu) && vcpu->arch.apic->apicv_active;
228 }
229
kvm_apic_has_pending_init_or_sipi(struct kvm_vcpu * vcpu)230 static inline bool kvm_apic_has_pending_init_or_sipi(struct kvm_vcpu *vcpu)
231 {
232 return lapic_in_kernel(vcpu) && vcpu->arch.apic->pending_events;
233 }
234
kvm_apic_init_sipi_allowed(struct kvm_vcpu * vcpu)235 static inline bool kvm_apic_init_sipi_allowed(struct kvm_vcpu *vcpu)
236 {
237 return !is_smm(vcpu) &&
238 !kvm_x86_call(apic_init_signal_blocked)(vcpu);
239 }
240
kvm_lowest_prio_delivery(struct kvm_lapic_irq * irq)241 static inline bool kvm_lowest_prio_delivery(struct kvm_lapic_irq *irq)
242 {
243 return (irq->delivery_mode == APIC_DM_LOWEST ||
244 irq->msi_redir_hint);
245 }
246
kvm_lapic_latched_init(struct kvm_vcpu * vcpu)247 static inline int kvm_lapic_latched_init(struct kvm_vcpu *vcpu)
248 {
249 return lapic_in_kernel(vcpu) && test_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events);
250 }
251
252 bool kvm_apic_pending_eoi(struct kvm_vcpu *vcpu, int vector);
253
254 void kvm_wait_lapic_expire(struct kvm_vcpu *vcpu);
255
256 void kvm_bitmap_or_dest_vcpus(struct kvm *kvm, struct kvm_lapic_irq *irq,
257 unsigned long *vcpu_bitmap);
258
259 bool kvm_intr_is_single_vcpu_fast(struct kvm *kvm, struct kvm_lapic_irq *irq,
260 struct kvm_vcpu **dest_vcpu);
261 int kvm_vector_to_index(u32 vector, u32 dest_vcpus,
262 const unsigned long *bitmap, u32 bitmap_size);
263 void kvm_lapic_switch_to_sw_timer(struct kvm_vcpu *vcpu);
264 void kvm_lapic_switch_to_hv_timer(struct kvm_vcpu *vcpu);
265 void kvm_lapic_expired_hv_timer(struct kvm_vcpu *vcpu);
266 bool kvm_lapic_hv_timer_in_use(struct kvm_vcpu *vcpu);
267 void kvm_lapic_restart_hv_timer(struct kvm_vcpu *vcpu);
268 bool kvm_can_use_hv_timer(struct kvm_vcpu *vcpu);
269
kvm_apic_mode(u64 apic_base)270 static inline enum lapic_mode kvm_apic_mode(u64 apic_base)
271 {
272 return apic_base & (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE);
273 }
274
kvm_xapic_id(struct kvm_lapic * apic)275 static inline u8 kvm_xapic_id(struct kvm_lapic *apic)
276 {
277 return kvm_lapic_get_reg(apic, APIC_ID) >> 24;
278 }
279
280 #endif
281