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 /* Select registers in the vAPIC cannot be read/written. */ 69 bool guest_apic_protected; 70 /* Number of bits set in ISR. */ 71 s16 isr_count; 72 /* The highest vector set in ISR; if -1 - invalid, must scan ISR. */ 73 int highest_isr_cache; 74 /** 75 * APIC register page. The layout matches the register layout seen by 76 * the guest 1:1, because it is accessed by the vmx microcode. 77 * Note: Only one register, the TPR, is used by the microcode. 78 */ 79 void *regs; 80 gpa_t vapic_addr; 81 struct gfn_to_hva_cache vapic_cache; 82 unsigned long pending_events; 83 unsigned int sipi_vector; 84 int nr_lvt_entries; 85 }; 86 87 struct dest_map; 88 89 int kvm_create_lapic(struct kvm_vcpu *vcpu); 90 void kvm_free_lapic(struct kvm_vcpu *vcpu); 91 92 int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu); 93 void kvm_apic_ack_interrupt(struct kvm_vcpu *vcpu, int vector); 94 int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu); 95 int kvm_apic_accept_events(struct kvm_vcpu *vcpu); 96 void kvm_lapic_reset(struct kvm_vcpu *vcpu, bool init_event); 97 u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu); 98 void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8); 99 void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu); 100 void kvm_apic_set_version(struct kvm_vcpu *vcpu); 101 void kvm_apic_after_set_mcg_cap(struct kvm_vcpu *vcpu); 102 bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source, 103 int shorthand, unsigned int dest, int dest_mode); 104 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2); 105 void kvm_apic_clear_irr(struct kvm_vcpu *vcpu, int vec); 106 bool __kvm_apic_update_irr(unsigned long *pir, void *regs, int *max_irr); 107 bool kvm_apic_update_irr(struct kvm_vcpu *vcpu, unsigned long *pir, int *max_irr); 108 void kvm_apic_update_ppr(struct kvm_vcpu *vcpu); 109 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq, 110 struct dest_map *dest_map); 111 int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type); 112 void kvm_apic_update_apicv(struct kvm_vcpu *vcpu); 113 int kvm_alloc_apic_access_page(struct kvm *kvm); 114 void kvm_inhibit_apic_access_page(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 int kvm_apic_set_base(struct kvm_vcpu *vcpu, u64 value, bool host_initiated); 121 int kvm_apic_get_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s); 122 int kvm_apic_set_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s); 123 void kvm_apic_update_hwapic_isr(struct kvm_vcpu *vcpu); 124 int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu); 125 126 u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu); 127 void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data); 128 129 void kvm_apic_write_nodecode(struct kvm_vcpu *vcpu, u32 offset); 130 void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector); 131 132 int kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr); 133 void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu); 134 void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu); 135 136 int kvm_x2apic_icr_write(struct kvm_lapic *apic, u64 data); 137 int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data); 138 int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data); 139 140 int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data); 141 int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data); 142 143 int kvm_lapic_set_pv_eoi(struct kvm_vcpu *vcpu, u64 data, unsigned long len); 144 void kvm_lapic_exit(void); 145 146 u64 kvm_lapic_readable_reg_mask(struct kvm_lapic *apic); 147 148 #define VEC_POS(v) ((v) & (32 - 1)) 149 #define REG_POS(v) (((v) >> 5) << 4) 150 151 static inline void kvm_lapic_clear_vector(int vec, void *bitmap) 152 { 153 clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); 154 } 155 156 static inline void kvm_lapic_set_vector(int vec, void *bitmap) 157 { 158 set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); 159 } 160 161 static inline void kvm_lapic_set_irr(int vec, struct kvm_lapic *apic) 162 { 163 kvm_lapic_set_vector(vec, apic->regs + APIC_IRR); 164 /* 165 * irr_pending must be true if any interrupt is pending; set it after 166 * APIC_IRR to avoid race with apic_clear_irr 167 */ 168 apic->irr_pending = true; 169 } 170 171 static inline u32 __kvm_lapic_get_reg(char *regs, int reg_off) 172 { 173 return *((u32 *) (regs + reg_off)); 174 } 175 176 static inline u32 kvm_lapic_get_reg(struct kvm_lapic *apic, int reg_off) 177 { 178 return __kvm_lapic_get_reg(apic->regs, reg_off); 179 } 180 181 DECLARE_STATIC_KEY_FALSE(kvm_has_noapic_vcpu); 182 183 static inline bool lapic_in_kernel(struct kvm_vcpu *vcpu) 184 { 185 if (static_branch_unlikely(&kvm_has_noapic_vcpu)) 186 return vcpu->arch.apic; 187 return true; 188 } 189 190 extern struct static_key_false_deferred apic_hw_disabled; 191 192 static inline bool kvm_apic_hw_enabled(struct kvm_lapic *apic) 193 { 194 if (static_branch_unlikely(&apic_hw_disabled.key)) 195 return apic->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE; 196 return true; 197 } 198 199 extern struct static_key_false_deferred apic_sw_disabled; 200 201 static inline bool kvm_apic_sw_enabled(struct kvm_lapic *apic) 202 { 203 if (static_branch_unlikely(&apic_sw_disabled.key)) 204 return apic->sw_enabled; 205 return true; 206 } 207 208 static inline bool kvm_apic_present(struct kvm_vcpu *vcpu) 209 { 210 return lapic_in_kernel(vcpu) && kvm_apic_hw_enabled(vcpu->arch.apic); 211 } 212 213 static inline int kvm_lapic_enabled(struct kvm_vcpu *vcpu) 214 { 215 return kvm_apic_present(vcpu) && kvm_apic_sw_enabled(vcpu->arch.apic); 216 } 217 218 static inline int apic_x2apic_mode(struct kvm_lapic *apic) 219 { 220 return apic->vcpu->arch.apic_base & X2APIC_ENABLE; 221 } 222 223 static inline bool kvm_vcpu_apicv_active(struct kvm_vcpu *vcpu) 224 { 225 return lapic_in_kernel(vcpu) && vcpu->arch.apic->apicv_active; 226 } 227 228 static inline bool kvm_apic_has_pending_init_or_sipi(struct kvm_vcpu *vcpu) 229 { 230 return lapic_in_kernel(vcpu) && vcpu->arch.apic->pending_events; 231 } 232 233 static inline bool kvm_apic_init_sipi_allowed(struct kvm_vcpu *vcpu) 234 { 235 return !is_smm(vcpu) && 236 !kvm_x86_call(apic_init_signal_blocked)(vcpu); 237 } 238 239 static inline bool kvm_lowest_prio_delivery(struct kvm_lapic_irq *irq) 240 { 241 return (irq->delivery_mode == APIC_DM_LOWEST || 242 irq->msi_redir_hint); 243 } 244 245 static inline int kvm_lapic_latched_init(struct kvm_vcpu *vcpu) 246 { 247 return lapic_in_kernel(vcpu) && test_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); 248 } 249 250 bool kvm_apic_pending_eoi(struct kvm_vcpu *vcpu, int vector); 251 252 void kvm_wait_lapic_expire(struct kvm_vcpu *vcpu); 253 254 void kvm_bitmap_or_dest_vcpus(struct kvm *kvm, struct kvm_lapic_irq *irq, 255 unsigned long *vcpu_bitmap); 256 257 bool kvm_intr_is_single_vcpu_fast(struct kvm *kvm, struct kvm_lapic_irq *irq, 258 struct kvm_vcpu **dest_vcpu); 259 int kvm_vector_to_index(u32 vector, u32 dest_vcpus, 260 const unsigned long *bitmap, u32 bitmap_size); 261 void kvm_lapic_switch_to_sw_timer(struct kvm_vcpu *vcpu); 262 void kvm_lapic_switch_to_hv_timer(struct kvm_vcpu *vcpu); 263 void kvm_lapic_expired_hv_timer(struct kvm_vcpu *vcpu); 264 bool kvm_lapic_hv_timer_in_use(struct kvm_vcpu *vcpu); 265 void kvm_lapic_restart_hv_timer(struct kvm_vcpu *vcpu); 266 bool kvm_can_use_hv_timer(struct kvm_vcpu *vcpu); 267 268 static inline enum lapic_mode kvm_apic_mode(u64 apic_base) 269 { 270 return apic_base & (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); 271 } 272 273 static inline enum lapic_mode kvm_get_apic_mode(struct kvm_vcpu *vcpu) 274 { 275 return kvm_apic_mode(vcpu->arch.apic_base); 276 } 277 278 static inline u8 kvm_xapic_id(struct kvm_lapic *apic) 279 { 280 return kvm_lapic_get_reg(apic, APIC_ID) >> 24; 281 } 282 283 #endif 284