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 25enum 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 32enum 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 46struct 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 59struct 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 86struct dest_map; 87 88int kvm_create_lapic(struct kvm_vcpu *vcpu, int timer_advance_ns); 89void kvm_free_lapic(struct kvm_vcpu *vcpu); 90 91int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu); 92int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu); 93int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu); 94int kvm_apic_accept_events(struct kvm_vcpu *vcpu); 95void kvm_lapic_reset(struct kvm_vcpu *vcpu, bool init_event); 96u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu); 97void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8); 98void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu); 99void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value); 100u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu); 101void kvm_recalculate_apic_map(struct kvm *kvm); 102void kvm_apic_set_version(struct kvm_vcpu *vcpu); 103void kvm_apic_after_set_mcg_cap(struct kvm_vcpu *vcpu); 104bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source, 105 int shorthand, unsigned int dest, int dest_mode); 106int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2); 107void kvm_apic_clear_irr(struct kvm_vcpu *vcpu, int vec); 108bool __kvm_apic_update_irr(u32 *pir, void *regs, int *max_irr); 109bool kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir, int *max_irr); 110void kvm_apic_update_ppr(struct kvm_vcpu *vcpu); 111int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq, 112 struct dest_map *dest_map); 113int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type); 114void kvm_apic_update_apicv(struct kvm_vcpu *vcpu); 115int kvm_alloc_apic_access_page(struct kvm *kvm); 116void kvm_inhibit_apic_access_page(struct kvm_vcpu *vcpu); 117 118bool 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); 120void kvm_apic_send_ipi(struct kvm_lapic *apic, u32 icr_low, u32 icr_high); 121 122u64 kvm_get_apic_base(struct kvm_vcpu *vcpu); 123int kvm_set_apic_base(struct kvm_vcpu *vcpu, struct msr_data *msr_info); 124int kvm_apic_get_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s); 125int kvm_apic_set_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s); 126enum lapic_mode kvm_get_apic_mode(struct kvm_vcpu *vcpu); 127int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu); 128 129u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu); 130void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data); 131 132void kvm_apic_write_nodecode(struct kvm_vcpu *vcpu, u32 offset); 133void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector); 134 135int kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr); 136void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu); 137void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu); 138 139int kvm_x2apic_icr_write(struct kvm_lapic *apic, u64 data); 140int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data); 141int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data); 142 143int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data); 144int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data); 145 146int kvm_lapic_set_pv_eoi(struct kvm_vcpu *vcpu, u64 data, unsigned long len); 147void kvm_lapic_exit(void); 148 149u64 kvm_lapic_readable_reg_mask(struct kvm_lapic *apic); 150 151#define VEC_POS(v) ((v) & (32 - 1)) 152#define REG_POS(v) (((v) >> 5) << 4) 153 154static inline void kvm_lapic_clear_vector(int vec, void *bitmap) 155{ 156 clear_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); 157} 158 159static inline void kvm_lapic_set_vector(int vec, void *bitmap) 160{ 161 set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); 162} 163 164static inline void kvm_lapic_set_irr(int vec, struct kvm_lapic *apic) 165{ 166 kvm_lapic_set_vector(vec, apic->regs + APIC_IRR); 167 /* 168 * irr_pending must be true if any interrupt is pending; set it after 169 * APIC_IRR to avoid race with apic_clear_irr 170 */ 171 apic->irr_pending = true; 172} 173 174static inline u32 __kvm_lapic_get_reg(char *regs, int reg_off) 175{ 176 return *((u32 *) (regs + reg_off)); 177} 178 179static inline u32 kvm_lapic_get_reg(struct kvm_lapic *apic, int reg_off) 180{ 181 return __kvm_lapic_get_reg(apic->regs, reg_off); 182} 183 184DECLARE_STATIC_KEY_FALSE(kvm_has_noapic_vcpu); 185 186static inline bool lapic_in_kernel(struct kvm_vcpu *vcpu) 187{ 188 if (static_branch_unlikely(&kvm_has_noapic_vcpu)) 189 return vcpu->arch.apic; 190 return true; 191} 192 193extern struct static_key_false_deferred apic_hw_disabled; 194 195static inline bool kvm_apic_hw_enabled(struct kvm_lapic *apic) 196{ 197 if (static_branch_unlikely(&apic_hw_disabled.key)) 198 return apic->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE; 199 return true; 200} 201 202extern struct static_key_false_deferred apic_sw_disabled; 203 204static inline bool kvm_apic_sw_enabled(struct kvm_lapic *apic) 205{ 206 if (static_branch_unlikely(&apic_sw_disabled.key)) 207 return apic->sw_enabled; 208 return true; 209} 210 211static inline bool kvm_apic_present(struct kvm_vcpu *vcpu) 212{ 213 return lapic_in_kernel(vcpu) && kvm_apic_hw_enabled(vcpu->arch.apic); 214} 215 216static inline int kvm_lapic_enabled(struct kvm_vcpu *vcpu) 217{ 218 return kvm_apic_present(vcpu) && kvm_apic_sw_enabled(vcpu->arch.apic); 219} 220 221static inline int apic_x2apic_mode(struct kvm_lapic *apic) 222{ 223 return apic->vcpu->arch.apic_base & X2APIC_ENABLE; 224} 225 226static inline bool kvm_vcpu_apicv_active(struct kvm_vcpu *vcpu) 227{ 228 return lapic_in_kernel(vcpu) && vcpu->arch.apic->apicv_active; 229} 230 231static inline bool kvm_apic_has_pending_init_or_sipi(struct kvm_vcpu *vcpu) 232{ 233 return lapic_in_kernel(vcpu) && vcpu->arch.apic->pending_events; 234} 235 236static inline bool kvm_apic_init_sipi_allowed(struct kvm_vcpu *vcpu) 237{ 238 return !is_smm(vcpu) && 239 !static_call(kvm_x86_apic_init_signal_blocked)(vcpu); 240} 241 242static inline bool kvm_lowest_prio_delivery(struct kvm_lapic_irq *irq) 243{ 244 return (irq->delivery_mode == APIC_DM_LOWEST || 245 irq->msi_redir_hint); 246} 247 248static inline int kvm_lapic_latched_init(struct kvm_vcpu *vcpu) 249{ 250 return lapic_in_kernel(vcpu) && test_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); 251} 252 253bool kvm_apic_pending_eoi(struct kvm_vcpu *vcpu, int vector); 254 255void kvm_wait_lapic_expire(struct kvm_vcpu *vcpu); 256 257void kvm_bitmap_or_dest_vcpus(struct kvm *kvm, struct kvm_lapic_irq *irq, 258 unsigned long *vcpu_bitmap); 259 260bool kvm_intr_is_single_vcpu_fast(struct kvm *kvm, struct kvm_lapic_irq *irq, 261 struct kvm_vcpu **dest_vcpu); 262int kvm_vector_to_index(u32 vector, u32 dest_vcpus, 263 const unsigned long *bitmap, u32 bitmap_size); 264void kvm_lapic_switch_to_sw_timer(struct kvm_vcpu *vcpu); 265void kvm_lapic_switch_to_hv_timer(struct kvm_vcpu *vcpu); 266void kvm_lapic_expired_hv_timer(struct kvm_vcpu *vcpu); 267bool kvm_lapic_hv_timer_in_use(struct kvm_vcpu *vcpu); 268void kvm_lapic_restart_hv_timer(struct kvm_vcpu *vcpu); 269bool kvm_can_use_hv_timer(struct kvm_vcpu *vcpu); 270 271static inline enum lapic_mode kvm_apic_mode(u64 apic_base) 272{ 273 return apic_base & (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); 274} 275 276static inline u8 kvm_xapic_id(struct kvm_lapic *apic) 277{ 278 return kvm_lapic_get_reg(apic, APIC_ID) >> 24; 279} 280 281#endif 282