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 #define KVM_APIC_INIT 0 10 #define KVM_APIC_SIPI 1 11 #define KVM_APIC_LVT_NUM 6 12 13 #define KVM_APIC_SHORT_MASK 0xc0000 14 #define KVM_APIC_DEST_MASK 0x800 15 16 #define APIC_BUS_CYCLE_NS 1 17 #define APIC_BUS_FREQUENCY (1000000000ULL / APIC_BUS_CYCLE_NS) 18 19 enum lapic_mode { 20 LAPIC_MODE_DISABLED = 0, 21 LAPIC_MODE_INVALID = X2APIC_ENABLE, 22 LAPIC_MODE_XAPIC = MSR_IA32_APICBASE_ENABLE, 23 LAPIC_MODE_X2APIC = MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE, 24 }; 25 26 struct kvm_timer { 27 struct hrtimer timer; 28 s64 period; /* unit: ns */ 29 ktime_t target_expiration; 30 u32 timer_mode; 31 u32 timer_mode_mask; 32 u64 tscdeadline; 33 u64 expired_tscdeadline; 34 u32 timer_advance_ns; 35 s64 advance_expire_delta; 36 atomic_t pending; /* accumulated triggered timers */ 37 bool hv_timer_in_use; 38 }; 39 40 struct kvm_lapic { 41 unsigned long base_address; 42 struct kvm_io_device dev; 43 struct kvm_timer lapic_timer; 44 u32 divide_count; 45 struct kvm_vcpu *vcpu; 46 bool sw_enabled; 47 bool irr_pending; 48 bool lvt0_in_nmi_mode; 49 /* Number of bits set in ISR. */ 50 s16 isr_count; 51 /* The highest vector set in ISR; if -1 - invalid, must scan ISR. */ 52 int highest_isr_cache; 53 /** 54 * APIC register page. The layout matches the register layout seen by 55 * the guest 1:1, because it is accessed by the vmx microcode. 56 * Note: Only one register, the TPR, is used by the microcode. 57 */ 58 void *regs; 59 gpa_t vapic_addr; 60 struct gfn_to_hva_cache vapic_cache; 61 unsigned long pending_events; 62 unsigned int sipi_vector; 63 }; 64 65 struct dest_map; 66 67 int kvm_create_lapic(struct kvm_vcpu *vcpu, int timer_advance_ns); 68 void kvm_free_lapic(struct kvm_vcpu *vcpu); 69 70 int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu); 71 int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu); 72 int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu); 73 void kvm_apic_accept_events(struct kvm_vcpu *vcpu); 74 void kvm_lapic_reset(struct kvm_vcpu *vcpu, bool init_event); 75 u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu); 76 void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8); 77 void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu); 78 void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value); 79 u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu); 80 void kvm_apic_set_version(struct kvm_vcpu *vcpu); 81 int kvm_lapic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val); 82 int kvm_lapic_reg_read(struct kvm_lapic *apic, u32 offset, int len, 83 void *data); 84 bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source, 85 int short_hand, unsigned int dest, int dest_mode); 86 87 bool __kvm_apic_update_irr(u32 *pir, void *regs, int *max_irr); 88 bool kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir, int *max_irr); 89 void kvm_apic_update_ppr(struct kvm_vcpu *vcpu); 90 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq, 91 struct dest_map *dest_map); 92 int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type); 93 94 bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src, 95 struct kvm_lapic_irq *irq, int *r, struct dest_map *dest_map); 96 97 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu); 98 int kvm_set_apic_base(struct kvm_vcpu *vcpu, struct msr_data *msr_info); 99 int kvm_apic_get_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s); 100 int kvm_apic_set_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s); 101 enum lapic_mode kvm_get_apic_mode(struct kvm_vcpu *vcpu); 102 int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu); 103 104 u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu); 105 void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data); 106 107 void kvm_apic_write_nodecode(struct kvm_vcpu *vcpu, u32 offset); 108 void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector); 109 110 int kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr); 111 void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu); 112 void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu); 113 114 int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data); 115 int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data); 116 117 int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data); 118 int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data); 119 120 static inline bool kvm_hv_vapic_assist_page_enabled(struct kvm_vcpu *vcpu) 121 { 122 return vcpu->arch.hyperv.hv_vapic & HV_X64_MSR_VP_ASSIST_PAGE_ENABLE; 123 } 124 125 int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data, unsigned long len); 126 void kvm_lapic_init(void); 127 void kvm_lapic_exit(void); 128 129 #define VEC_POS(v) ((v) & (32 - 1)) 130 #define REG_POS(v) (((v) >> 5) << 4) 131 132 static inline void kvm_lapic_clear_vector(int vec, void *bitmap) 133 { 134 clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); 135 } 136 137 static inline void kvm_lapic_set_vector(int vec, void *bitmap) 138 { 139 set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); 140 } 141 142 static inline void kvm_lapic_set_irr(int vec, struct kvm_lapic *apic) 143 { 144 kvm_lapic_set_vector(vec, apic->regs + APIC_IRR); 145 /* 146 * irr_pending must be true if any interrupt is pending; set it after 147 * APIC_IRR to avoid race with apic_clear_irr 148 */ 149 apic->irr_pending = true; 150 } 151 152 static inline u32 kvm_lapic_get_reg(struct kvm_lapic *apic, int reg_off) 153 { 154 return *((u32 *) (apic->regs + reg_off)); 155 } 156 157 static inline void kvm_lapic_set_reg(struct kvm_lapic *apic, int reg_off, u32 val) 158 { 159 *((u32 *) (apic->regs + reg_off)) = val; 160 } 161 162 extern struct static_key kvm_no_apic_vcpu; 163 164 static inline bool lapic_in_kernel(struct kvm_vcpu *vcpu) 165 { 166 if (static_key_false(&kvm_no_apic_vcpu)) 167 return vcpu->arch.apic; 168 return true; 169 } 170 171 extern struct static_key_deferred apic_hw_disabled; 172 173 static inline int kvm_apic_hw_enabled(struct kvm_lapic *apic) 174 { 175 if (static_key_false(&apic_hw_disabled.key)) 176 return apic->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE; 177 return MSR_IA32_APICBASE_ENABLE; 178 } 179 180 extern struct static_key_deferred apic_sw_disabled; 181 182 static inline bool kvm_apic_sw_enabled(struct kvm_lapic *apic) 183 { 184 if (static_key_false(&apic_sw_disabled.key)) 185 return apic->sw_enabled; 186 return true; 187 } 188 189 static inline bool kvm_apic_present(struct kvm_vcpu *vcpu) 190 { 191 return lapic_in_kernel(vcpu) && kvm_apic_hw_enabled(vcpu->arch.apic); 192 } 193 194 static inline int kvm_lapic_enabled(struct kvm_vcpu *vcpu) 195 { 196 return kvm_apic_present(vcpu) && kvm_apic_sw_enabled(vcpu->arch.apic); 197 } 198 199 static inline int apic_x2apic_mode(struct kvm_lapic *apic) 200 { 201 return apic->vcpu->arch.apic_base & X2APIC_ENABLE; 202 } 203 204 static inline bool kvm_vcpu_apicv_active(struct kvm_vcpu *vcpu) 205 { 206 return vcpu->arch.apic && vcpu->arch.apicv_active; 207 } 208 209 static inline bool kvm_apic_has_events(struct kvm_vcpu *vcpu) 210 { 211 return lapic_in_kernel(vcpu) && vcpu->arch.apic->pending_events; 212 } 213 214 static inline bool kvm_lowest_prio_delivery(struct kvm_lapic_irq *irq) 215 { 216 return (irq->delivery_mode == APIC_DM_LOWEST || 217 irq->msi_redir_hint); 218 } 219 220 static inline int kvm_lapic_latched_init(struct kvm_vcpu *vcpu) 221 { 222 return lapic_in_kernel(vcpu) && test_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); 223 } 224 225 bool kvm_apic_pending_eoi(struct kvm_vcpu *vcpu, int vector); 226 227 void kvm_wait_lapic_expire(struct kvm_vcpu *vcpu); 228 229 void kvm_bitmap_or_dest_vcpus(struct kvm *kvm, struct kvm_lapic_irq *irq, 230 unsigned long *vcpu_bitmap); 231 232 bool kvm_intr_is_single_vcpu_fast(struct kvm *kvm, struct kvm_lapic_irq *irq, 233 struct kvm_vcpu **dest_vcpu); 234 int kvm_vector_to_index(u32 vector, u32 dest_vcpus, 235 const unsigned long *bitmap, u32 bitmap_size); 236 void kvm_lapic_switch_to_sw_timer(struct kvm_vcpu *vcpu); 237 void kvm_lapic_switch_to_hv_timer(struct kvm_vcpu *vcpu); 238 void kvm_lapic_expired_hv_timer(struct kvm_vcpu *vcpu); 239 bool kvm_lapic_hv_timer_in_use(struct kvm_vcpu *vcpu); 240 void kvm_lapic_restart_hv_timer(struct kvm_vcpu *vcpu); 241 bool kvm_can_post_timer_interrupt(struct kvm_vcpu *vcpu); 242 243 static inline enum lapic_mode kvm_apic_mode(u64 apic_base) 244 { 245 return apic_base & (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); 246 } 247 248 static inline u8 kvm_xapic_id(struct kvm_lapic *apic) 249 { 250 return kvm_lapic_get_reg(apic, APIC_ID) >> 24; 251 } 252 253 #endif 254