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 "kvm_cache_regs.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); 115 116 bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src, 117 struct kvm_lapic_irq *irq, int *r, struct dest_map *dest_map); 118 void kvm_apic_send_ipi(struct kvm_lapic *apic, u32 icr_low, u32 icr_high); 119 120 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu); 121 int kvm_set_apic_base(struct kvm_vcpu *vcpu, struct msr_data *msr_info); 122 int kvm_apic_get_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s); 123 int kvm_apic_set_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s); 124 enum lapic_mode kvm_get_apic_mode(struct kvm_vcpu *vcpu); 125 int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu); 126 127 u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu); 128 void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data); 129 130 void kvm_apic_write_nodecode(struct kvm_vcpu *vcpu, u32 offset); 131 void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector); 132 133 int kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr); 134 void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu); 135 void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu); 136 137 int kvm_x2apic_icr_write(struct kvm_lapic *apic, u64 data); 138 int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data); 139 int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data); 140 141 int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data); 142 int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data); 143 144 int kvm_lapic_set_pv_eoi(struct kvm_vcpu *vcpu, u64 data, unsigned long len); 145 void kvm_lapic_exit(void); 146 147 #define VEC_POS(v) ((v) & (32 - 1)) 148 #define REG_POS(v) (((v) >> 5) << 4) 149 150 static inline void kvm_lapic_clear_vector(int vec, void *bitmap) 151 { 152 clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); 153 } 154 155 static inline void kvm_lapic_set_vector(int vec, void *bitmap) 156 { 157 set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); 158 } 159 160 static inline void kvm_lapic_set_irr(int vec, struct kvm_lapic *apic) 161 { 162 kvm_lapic_set_vector(vec, apic->regs + APIC_IRR); 163 /* 164 * irr_pending must be true if any interrupt is pending; set it after 165 * APIC_IRR to avoid race with apic_clear_irr 166 */ 167 apic->irr_pending = true; 168 } 169 170 static inline u32 __kvm_lapic_get_reg(char *regs, int reg_off) 171 { 172 return *((u32 *) (regs + reg_off)); 173 } 174 175 static inline u32 kvm_lapic_get_reg(struct kvm_lapic *apic, int reg_off) 176 { 177 return __kvm_lapic_get_reg(apic->regs, reg_off); 178 } 179 180 DECLARE_STATIC_KEY_FALSE(kvm_has_noapic_vcpu); 181 182 static inline bool lapic_in_kernel(struct kvm_vcpu *vcpu) 183 { 184 if (static_branch_unlikely(&kvm_has_noapic_vcpu)) 185 return vcpu->arch.apic; 186 return true; 187 } 188 189 extern struct static_key_false_deferred apic_hw_disabled; 190 191 static inline int kvm_apic_hw_enabled(struct kvm_lapic *apic) 192 { 193 if (static_branch_unlikely(&apic_hw_disabled.key)) 194 return apic->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE; 195 return MSR_IA32_APICBASE_ENABLE; 196 } 197 198 extern struct static_key_false_deferred apic_sw_disabled; 199 200 static inline bool kvm_apic_sw_enabled(struct kvm_lapic *apic) 201 { 202 if (static_branch_unlikely(&apic_sw_disabled.key)) 203 return apic->sw_enabled; 204 return true; 205 } 206 207 static inline bool kvm_apic_present(struct kvm_vcpu *vcpu) 208 { 209 return lapic_in_kernel(vcpu) && kvm_apic_hw_enabled(vcpu->arch.apic); 210 } 211 212 static inline int kvm_lapic_enabled(struct kvm_vcpu *vcpu) 213 { 214 return kvm_apic_present(vcpu) && kvm_apic_sw_enabled(vcpu->arch.apic); 215 } 216 217 static inline int apic_x2apic_mode(struct kvm_lapic *apic) 218 { 219 return apic->vcpu->arch.apic_base & X2APIC_ENABLE; 220 } 221 222 static inline bool kvm_vcpu_apicv_active(struct kvm_vcpu *vcpu) 223 { 224 return lapic_in_kernel(vcpu) && vcpu->arch.apic->apicv_active; 225 } 226 227 static inline bool kvm_apic_has_pending_init_or_sipi(struct kvm_vcpu *vcpu) 228 { 229 return lapic_in_kernel(vcpu) && vcpu->arch.apic->pending_events; 230 } 231 232 static inline bool kvm_apic_init_sipi_allowed(struct kvm_vcpu *vcpu) 233 { 234 return !is_smm(vcpu) && 235 !static_call(kvm_x86_apic_init_signal_blocked)(vcpu); 236 } 237 238 static inline bool kvm_lowest_prio_delivery(struct kvm_lapic_irq *irq) 239 { 240 return (irq->delivery_mode == APIC_DM_LOWEST || 241 irq->msi_redir_hint); 242 } 243 244 static inline int kvm_lapic_latched_init(struct kvm_vcpu *vcpu) 245 { 246 return lapic_in_kernel(vcpu) && test_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); 247 } 248 249 bool kvm_apic_pending_eoi(struct kvm_vcpu *vcpu, int vector); 250 251 void kvm_wait_lapic_expire(struct kvm_vcpu *vcpu); 252 253 void kvm_bitmap_or_dest_vcpus(struct kvm *kvm, struct kvm_lapic_irq *irq, 254 unsigned long *vcpu_bitmap); 255 256 bool kvm_intr_is_single_vcpu_fast(struct kvm *kvm, struct kvm_lapic_irq *irq, 257 struct kvm_vcpu **dest_vcpu); 258 int kvm_vector_to_index(u32 vector, u32 dest_vcpus, 259 const unsigned long *bitmap, u32 bitmap_size); 260 void kvm_lapic_switch_to_sw_timer(struct kvm_vcpu *vcpu); 261 void kvm_lapic_switch_to_hv_timer(struct kvm_vcpu *vcpu); 262 void kvm_lapic_expired_hv_timer(struct kvm_vcpu *vcpu); 263 bool kvm_lapic_hv_timer_in_use(struct kvm_vcpu *vcpu); 264 void kvm_lapic_restart_hv_timer(struct kvm_vcpu *vcpu); 265 bool kvm_can_use_hv_timer(struct kvm_vcpu *vcpu); 266 267 static inline enum lapic_mode kvm_apic_mode(u64 apic_base) 268 { 269 return apic_base & (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); 270 } 271 272 static inline u8 kvm_xapic_id(struct kvm_lapic *apic) 273 { 274 return kvm_lapic_get_reg(apic, APIC_ID) >> 24; 275 } 276 277 #endif 278