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 1 20 #define APIC_BUS_FREQUENCY (1000000000ULL / APIC_BUS_CYCLE_NS) 21 22 #define APIC_BROADCAST 0xFF 23 #define X2APIC_BROADCAST 0xFFFFFFFFul 24 25 enum lapic_mode { 26 LAPIC_MODE_DISABLED = 0, 27 LAPIC_MODE_INVALID = X2APIC_ENABLE, 28 LAPIC_MODE_XAPIC = MSR_IA32_APICBASE_ENABLE, 29 LAPIC_MODE_X2APIC = MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE, 30 }; 31 32 enum lapic_lvt_entry { 33 LVT_TIMER, 34 LVT_THERMAL_MONITOR, 35 LVT_PERFORMANCE_COUNTER, 36 LVT_LINT0, 37 LVT_LINT1, 38 LVT_ERROR, 39 LVT_CMCI, 40 41 KVM_APIC_MAX_NR_LVT_ENTRIES, 42 }; 43 44 #define APIC_LVTx(x) ((x) == LVT_CMCI ? APIC_LVTCMCI : APIC_LVTT + 0x10 * (x)) 45 46 struct kvm_timer { 47 struct hrtimer timer; 48 s64 period; /* unit: ns */ 49 ktime_t target_expiration; 50 u32 timer_mode; 51 u32 timer_mode_mask; 52 u64 tscdeadline; 53 u64 expired_tscdeadline; 54 u32 timer_advance_ns; 55 atomic_t pending; /* accumulated triggered timers */ 56 bool hv_timer_in_use; 57 }; 58 59 struct kvm_lapic { 60 unsigned long base_address; 61 struct kvm_io_device dev; 62 struct kvm_timer lapic_timer; 63 u32 divide_count; 64 struct kvm_vcpu *vcpu; 65 bool apicv_active; 66 bool sw_enabled; 67 bool irr_pending; 68 bool lvt0_in_nmi_mode; 69 /* Number of bits set in ISR. */ 70 s16 isr_count; 71 /* The highest vector set in ISR; if -1 - invalid, must scan ISR. */ 72 int highest_isr_cache; 73 /** 74 * APIC register page. The layout matches the register layout seen by 75 * the guest 1:1, because it is accessed by the vmx microcode. 76 * Note: Only one register, the TPR, is used by the microcode. 77 */ 78 void *regs; 79 gpa_t vapic_addr; 80 struct gfn_to_hva_cache vapic_cache; 81 unsigned long pending_events; 82 unsigned int sipi_vector; 83 int nr_lvt_entries; 84 }; 85 86 struct dest_map; 87 88 int kvm_create_lapic(struct kvm_vcpu *vcpu, int timer_advance_ns); 89 void kvm_free_lapic(struct kvm_vcpu *vcpu); 90 91 int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu); 92 int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu); 93 int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu); 94 int kvm_apic_accept_events(struct kvm_vcpu *vcpu); 95 void kvm_lapic_reset(struct kvm_vcpu *vcpu, bool init_event); 96 u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu); 97 void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8); 98 void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu); 99 void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value); 100 u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu); 101 void kvm_recalculate_apic_map(struct kvm *kvm); 102 void kvm_apic_set_version(struct kvm_vcpu *vcpu); 103 void kvm_apic_after_set_mcg_cap(struct kvm_vcpu *vcpu); 104 bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source, 105 int shorthand, unsigned int dest, int dest_mode); 106 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2); 107 void kvm_apic_clear_irr(struct kvm_vcpu *vcpu, int vec); 108 bool __kvm_apic_update_irr(u32 *pir, void *regs, int *max_irr); 109 bool kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir, int *max_irr); 110 void kvm_apic_update_ppr(struct kvm_vcpu *vcpu); 111 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq, 112 struct dest_map *dest_map); 113 int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type); 114 void kvm_apic_update_apicv(struct kvm_vcpu *vcpu); 115 int kvm_alloc_apic_access_page(struct kvm *kvm); 116 void kvm_inhibit_apic_access_page(struct kvm_vcpu *vcpu); 117 118 bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src, 119 struct kvm_lapic_irq *irq, int *r, struct dest_map *dest_map); 120 void kvm_apic_send_ipi(struct kvm_lapic *apic, u32 icr_low, u32 icr_high); 121 122 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu); 123 int kvm_set_apic_base(struct kvm_vcpu *vcpu, struct msr_data *msr_info); 124 int kvm_apic_get_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s); 125 int kvm_apic_set_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s); 126 enum lapic_mode kvm_get_apic_mode(struct kvm_vcpu *vcpu); 127 int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu); 128 129 u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu); 130 void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data); 131 132 void kvm_apic_write_nodecode(struct kvm_vcpu *vcpu, u32 offset); 133 void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector); 134 135 int kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr); 136 void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu); 137 void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu); 138 139 int kvm_x2apic_icr_write(struct kvm_lapic *apic, u64 data); 140 int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data); 141 int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data); 142 143 int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data); 144 int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data); 145 146 int kvm_lapic_set_pv_eoi(struct kvm_vcpu *vcpu, u64 data, unsigned long len); 147 void kvm_lapic_exit(void); 148 149 #define VEC_POS(v) ((v) & (32 - 1)) 150 #define REG_POS(v) (((v) >> 5) << 4) 151 152 static inline void kvm_lapic_clear_vector(int vec, void *bitmap) 153 { 154 clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); 155 } 156 157 static inline void kvm_lapic_set_vector(int vec, void *bitmap) 158 { 159 set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); 160 } 161 162 static inline void kvm_lapic_set_irr(int vec, struct kvm_lapic *apic) 163 { 164 kvm_lapic_set_vector(vec, apic->regs + APIC_IRR); 165 /* 166 * irr_pending must be true if any interrupt is pending; set it after 167 * APIC_IRR to avoid race with apic_clear_irr 168 */ 169 apic->irr_pending = true; 170 } 171 172 static inline u32 __kvm_lapic_get_reg(char *regs, int reg_off) 173 { 174 return *((u32 *) (regs + reg_off)); 175 } 176 177 static inline u32 kvm_lapic_get_reg(struct kvm_lapic *apic, int reg_off) 178 { 179 return __kvm_lapic_get_reg(apic->regs, reg_off); 180 } 181 182 DECLARE_STATIC_KEY_FALSE(kvm_has_noapic_vcpu); 183 184 static inline bool lapic_in_kernel(struct kvm_vcpu *vcpu) 185 { 186 if (static_branch_unlikely(&kvm_has_noapic_vcpu)) 187 return vcpu->arch.apic; 188 return true; 189 } 190 191 extern struct static_key_false_deferred apic_hw_disabled; 192 193 static inline bool kvm_apic_hw_enabled(struct kvm_lapic *apic) 194 { 195 if (static_branch_unlikely(&apic_hw_disabled.key)) 196 return apic->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE; 197 return true; 198 } 199 200 extern struct static_key_false_deferred apic_sw_disabled; 201 202 static inline bool kvm_apic_sw_enabled(struct kvm_lapic *apic) 203 { 204 if (static_branch_unlikely(&apic_sw_disabled.key)) 205 return apic->sw_enabled; 206 return true; 207 } 208 209 static inline bool kvm_apic_present(struct kvm_vcpu *vcpu) 210 { 211 return lapic_in_kernel(vcpu) && kvm_apic_hw_enabled(vcpu->arch.apic); 212 } 213 214 static inline int kvm_lapic_enabled(struct kvm_vcpu *vcpu) 215 { 216 return kvm_apic_present(vcpu) && kvm_apic_sw_enabled(vcpu->arch.apic); 217 } 218 219 static inline int apic_x2apic_mode(struct kvm_lapic *apic) 220 { 221 return apic->vcpu->arch.apic_base & X2APIC_ENABLE; 222 } 223 224 static inline bool kvm_vcpu_apicv_active(struct kvm_vcpu *vcpu) 225 { 226 return lapic_in_kernel(vcpu) && vcpu->arch.apic->apicv_active; 227 } 228 229 static inline bool kvm_apic_has_pending_init_or_sipi(struct kvm_vcpu *vcpu) 230 { 231 return lapic_in_kernel(vcpu) && vcpu->arch.apic->pending_events; 232 } 233 234 static inline bool kvm_apic_init_sipi_allowed(struct kvm_vcpu *vcpu) 235 { 236 return !is_smm(vcpu) && 237 !static_call(kvm_x86_apic_init_signal_blocked)(vcpu); 238 } 239 240 static inline bool kvm_lowest_prio_delivery(struct kvm_lapic_irq *irq) 241 { 242 return (irq->delivery_mode == APIC_DM_LOWEST || 243 irq->msi_redir_hint); 244 } 245 246 static inline int kvm_lapic_latched_init(struct kvm_vcpu *vcpu) 247 { 248 return lapic_in_kernel(vcpu) && test_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); 249 } 250 251 bool kvm_apic_pending_eoi(struct kvm_vcpu *vcpu, int vector); 252 253 void kvm_wait_lapic_expire(struct kvm_vcpu *vcpu); 254 255 void kvm_bitmap_or_dest_vcpus(struct kvm *kvm, struct kvm_lapic_irq *irq, 256 unsigned long *vcpu_bitmap); 257 258 bool kvm_intr_is_single_vcpu_fast(struct kvm *kvm, struct kvm_lapic_irq *irq, 259 struct kvm_vcpu **dest_vcpu); 260 int kvm_vector_to_index(u32 vector, u32 dest_vcpus, 261 const unsigned long *bitmap, u32 bitmap_size); 262 void kvm_lapic_switch_to_sw_timer(struct kvm_vcpu *vcpu); 263 void kvm_lapic_switch_to_hv_timer(struct kvm_vcpu *vcpu); 264 void kvm_lapic_expired_hv_timer(struct kvm_vcpu *vcpu); 265 bool kvm_lapic_hv_timer_in_use(struct kvm_vcpu *vcpu); 266 void kvm_lapic_restart_hv_timer(struct kvm_vcpu *vcpu); 267 bool kvm_can_use_hv_timer(struct kvm_vcpu *vcpu); 268 269 static inline enum lapic_mode kvm_apic_mode(u64 apic_base) 270 { 271 return apic_base & (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); 272 } 273 274 static inline u8 kvm_xapic_id(struct kvm_lapic *apic) 275 { 276 return kvm_lapic_get_reg(apic, APIC_ID) >> 24; 277 } 278 279 #endif 280