| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef __KVM_X86_LAPIC_H |
| #define __KVM_X86_LAPIC_H |
| |
| #include <kvm/iodev.h> |
| |
| #include <linux/kvm_host.h> |
| |
| #define KVM_APIC_INIT 0 |
| #define KVM_APIC_SIPI 1 |
| #define KVM_APIC_LVT_NUM 6 |
| |
| #define KVM_APIC_SHORT_MASK 0xc0000 |
| #define KVM_APIC_DEST_MASK 0x800 |
| |
| #define APIC_BUS_CYCLE_NS 1 |
| #define APIC_BUS_FREQUENCY (1000000000ULL / APIC_BUS_CYCLE_NS) |
| |
| enum lapic_mode { |
| LAPIC_MODE_DISABLED = 0, |
| LAPIC_MODE_INVALID = X2APIC_ENABLE, |
| LAPIC_MODE_XAPIC = MSR_IA32_APICBASE_ENABLE, |
| LAPIC_MODE_X2APIC = MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE, |
| }; |
| |
| struct kvm_timer { |
| struct hrtimer timer; |
| s64 period; /* unit: ns */ |
| ktime_t target_expiration; |
| u32 timer_mode; |
| u32 timer_mode_mask; |
| u64 tscdeadline; |
| u64 expired_tscdeadline; |
| atomic_t pending; /* accumulated triggered timers */ |
| bool hv_timer_in_use; |
| }; |
| |
| struct kvm_lapic { |
| unsigned long base_address; |
| struct kvm_io_device dev; |
| struct kvm_timer lapic_timer; |
| u32 divide_count; |
| struct kvm_vcpu *vcpu; |
| bool sw_enabled; |
| bool irr_pending; |
| bool lvt0_in_nmi_mode; |
| /* Number of bits set in ISR. */ |
| s16 isr_count; |
| /* The highest vector set in ISR; if -1 - invalid, must scan ISR. */ |
| int highest_isr_cache; |
| /** |
| * APIC register page. The layout matches the register layout seen by |
| * the guest 1:1, because it is accessed by the vmx microcode. |
| * Note: Only one register, the TPR, is used by the microcode. |
| */ |
| void *regs; |
| gpa_t vapic_addr; |
| struct gfn_to_hva_cache vapic_cache; |
| unsigned long pending_events; |
| unsigned int sipi_vector; |
| }; |
| |
| struct dest_map; |
| |
| int kvm_create_lapic(struct kvm_vcpu *vcpu); |
| void kvm_free_lapic(struct kvm_vcpu *vcpu); |
| |
| int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu); |
| int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu); |
| int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu); |
| void kvm_apic_accept_events(struct kvm_vcpu *vcpu); |
| void kvm_lapic_reset(struct kvm_vcpu *vcpu, bool init_event); |
| u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu); |
| void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8); |
| void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu); |
| void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value); |
| u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu); |
| void kvm_apic_set_version(struct kvm_vcpu *vcpu); |
| int kvm_lapic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val); |
| int kvm_lapic_reg_read(struct kvm_lapic *apic, u32 offset, int len, |
| void *data); |
| bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source, |
| int short_hand, unsigned int dest, int dest_mode); |
| |
| int __kvm_apic_update_irr(u32 *pir, void *regs); |
| int kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir); |
| void kvm_apic_update_ppr(struct kvm_vcpu *vcpu); |
| int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq, |
| struct dest_map *dest_map); |
| int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type); |
| |
| bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src, |
| struct kvm_lapic_irq *irq, int *r, struct dest_map *dest_map); |
| |
| u64 kvm_get_apic_base(struct kvm_vcpu *vcpu); |
| int kvm_set_apic_base(struct kvm_vcpu *vcpu, struct msr_data *msr_info); |
| int kvm_apic_get_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s); |
| int kvm_apic_set_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s); |
| enum lapic_mode kvm_get_apic_mode(struct kvm_vcpu *vcpu); |
| int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu); |
| |
| u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu); |
| void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data); |
| |
| void kvm_apic_write_nodecode(struct kvm_vcpu *vcpu, u32 offset); |
| void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector); |
| |
| int kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr); |
| void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu); |
| void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu); |
| |
| int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data); |
| int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data); |
| |
| int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data); |
| int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data); |
| |
| static inline bool kvm_hv_vapic_assist_page_enabled(struct kvm_vcpu *vcpu) |
| { |
| return vcpu->arch.hyperv.hv_vapic & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE; |
| } |
| |
| int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data); |
| void kvm_lapic_init(void); |
| void kvm_lapic_exit(void); |
| |
| #define VEC_POS(v) ((v) & (32 - 1)) |
| #define REG_POS(v) (((v) >> 5) << 4) |
| |
| static inline void kvm_lapic_set_vector(int vec, void *bitmap) |
| { |
| set_bit(VEC_POS(vec), (bitmap) + REG_POS(vec)); |
| } |
| |
| static inline void kvm_lapic_set_irr(int vec, struct kvm_lapic *apic) |
| { |
| kvm_lapic_set_vector(vec, apic->regs + APIC_IRR); |
| /* |
| * irr_pending must be true if any interrupt is pending; set it after |
| * APIC_IRR to avoid race with apic_clear_irr |
| */ |
| apic->irr_pending = true; |
| } |
| |
| static inline u32 kvm_lapic_get_reg(struct kvm_lapic *apic, int reg_off) |
| { |
| return *((u32 *) (apic->regs + reg_off)); |
| } |
| |
| static inline void kvm_lapic_set_reg(struct kvm_lapic *apic, int reg_off, u32 val) |
| { |
| *((u32 *) (apic->regs + reg_off)) = val; |
| } |
| |
| extern struct static_key kvm_no_apic_vcpu; |
| |
| static inline bool lapic_in_kernel(struct kvm_vcpu *vcpu) |
| { |
| if (static_key_false(&kvm_no_apic_vcpu)) |
| return vcpu->arch.apic; |
| return true; |
| } |
| |
| extern struct static_key_deferred apic_hw_disabled; |
| |
| static inline int kvm_apic_hw_enabled(struct kvm_lapic *apic) |
| { |
| if (static_key_false(&apic_hw_disabled.key)) |
| return apic->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE; |
| return MSR_IA32_APICBASE_ENABLE; |
| } |
| |
| extern struct static_key_deferred apic_sw_disabled; |
| |
| static inline bool kvm_apic_sw_enabled(struct kvm_lapic *apic) |
| { |
| if (static_key_false(&apic_sw_disabled.key)) |
| return apic->sw_enabled; |
| return true; |
| } |
| |
| static inline bool kvm_apic_present(struct kvm_vcpu *vcpu) |
| { |
| return lapic_in_kernel(vcpu) && kvm_apic_hw_enabled(vcpu->arch.apic); |
| } |
| |
| static inline int kvm_lapic_enabled(struct kvm_vcpu *vcpu) |
| { |
| return kvm_apic_present(vcpu) && kvm_apic_sw_enabled(vcpu->arch.apic); |
| } |
| |
| static inline int apic_x2apic_mode(struct kvm_lapic *apic) |
| { |
| return apic->vcpu->arch.apic_base & X2APIC_ENABLE; |
| } |
| |
| static inline bool kvm_vcpu_apicv_active(struct kvm_vcpu *vcpu) |
| { |
| return vcpu->arch.apic && vcpu->arch.apicv_active; |
| } |
| |
| static inline bool kvm_apic_has_events(struct kvm_vcpu *vcpu) |
| { |
| return lapic_in_kernel(vcpu) && vcpu->arch.apic->pending_events; |
| } |
| |
| static inline bool kvm_lowest_prio_delivery(struct kvm_lapic_irq *irq) |
| { |
| return (irq->delivery_mode == APIC_DM_LOWEST || |
| irq->msi_redir_hint); |
| } |
| |
| static inline int kvm_lapic_latched_init(struct kvm_vcpu *vcpu) |
| { |
| return lapic_in_kernel(vcpu) && test_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); |
| } |
| |
| bool kvm_apic_pending_eoi(struct kvm_vcpu *vcpu, int vector); |
| |
| void wait_lapic_expire(struct kvm_vcpu *vcpu); |
| |
| bool kvm_intr_is_single_vcpu_fast(struct kvm *kvm, struct kvm_lapic_irq *irq, |
| struct kvm_vcpu **dest_vcpu); |
| int kvm_vector_to_index(u32 vector, u32 dest_vcpus, |
| const unsigned long *bitmap, u32 bitmap_size); |
| void kvm_lapic_switch_to_sw_timer(struct kvm_vcpu *vcpu); |
| void kvm_lapic_switch_to_hv_timer(struct kvm_vcpu *vcpu); |
| void kvm_lapic_expired_hv_timer(struct kvm_vcpu *vcpu); |
| bool kvm_lapic_hv_timer_in_use(struct kvm_vcpu *vcpu); |
| void kvm_lapic_restart_hv_timer(struct kvm_vcpu *vcpu); |
| |
| static inline enum lapic_mode kvm_apic_mode(u64 apic_base) |
| { |
| return apic_base & (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); |
| } |
| |
| #endif |