arch/x86/kvm/lapic.h

   1 #ifndef __KVM_X86_LAPIC_H
   2 #define __KVM_X86_LAPIC_H
   3
   4 #include <kvm/iodev.h>
   5
   6 #include <linux/kvm_host.h>
   7
   8 #define KVM_APIC_INIT           0
   9 #define KVM_APIC_SIPI           1
  10
  11 struct kvm_timer {
  12         struct hrtimer timer;
  13         s64 period;                             /* unit: ns */
  14         u32 timer_mode;
  15         u32 timer_mode_mask;
  16         u64 tscdeadline;
  17         u64 expired_tscdeadline;
  18         atomic_t pending;                       /* accumulated triggered timers */
  19 };
  20
  21 struct kvm_lapic {
  22         unsigned long base_address;
  23         struct kvm_io_device dev;
  24         struct kvm_timer lapic_timer;
  25         u32 divide_count;
  26         struct kvm_vcpu *vcpu;
  27         bool sw_enabled;
  28         bool irr_pending;
  29         bool lvt0_in_nmi_mode;
  30         /* Number of bits set in ISR. */
  31         s16 isr_count;
  32         /* The highest vector set in ISR; if -1 - invalid, must scan ISR. */
  33         int highest_isr_cache;
  34         /**
  35          * APIC register page.  The layout matches the register layout seen by
  36          * the guest 1:1, because it is accessed by the vmx microcode.
  37          * Note: Only one register, the TPR, is used by the microcode.
  38          */
  39         void *regs;
  40         gpa_t vapic_addr;
  41         struct gfn_to_hva_cache vapic_cache;
  42         unsigned long pending_events;
  43         unsigned int sipi_vector;
  44 };
  45 int kvm_create_lapic(struct kvm_vcpu *vcpu);
  46 void kvm_free_lapic(struct kvm_vcpu *vcpu);
  47
  48 int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu);
  49 int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu);
  50 int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu);
  51 void kvm_apic_accept_events(struct kvm_vcpu *vcpu);
  52 void kvm_lapic_reset(struct kvm_vcpu *vcpu, bool init_event);
  53 u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu);
  54 void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8);
  55 void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu);
  56 void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value);
  57 u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu);
  58 void kvm_apic_set_version(struct kvm_vcpu *vcpu);
  59
  60 void __kvm_apic_update_irr(u32 *pir, void *regs);
  61 void kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir);
  62 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq,
  63                 unsigned long *dest_map);
  64 int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type);
  65
  66 bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
  67                 struct kvm_lapic_irq *irq, int *r, unsigned long *dest_map);
  68
  69 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu);
  70 int kvm_set_apic_base(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
  71 void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu,
  72                 struct kvm_lapic_state *s);
  73 int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu);
  74
  75 u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu);
  76 void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data);
  77
  78 void kvm_apic_write_nodecode(struct kvm_vcpu *vcpu, u32 offset);
  79 void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector);
  80
  81 int kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr);
  82 void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu);
  83 void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu);
  84
  85 int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
  86 int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
  87
  88 int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
  89 int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
  90
  91 static inline bool kvm_hv_vapic_assist_page_enabled(struct kvm_vcpu *vcpu)
  92 {
  93         return vcpu->arch.hyperv.hv_vapic & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE;
  94 }
  95
  96 int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data);
  97 void kvm_lapic_init(void);
  98
  99 static inline u32 kvm_apic_get_reg(struct kvm_lapic *apic, int reg_off)
 100 {
 101                 return *((u32 *) (apic->regs + reg_off));
 102 }
 103
 104 extern struct static_key kvm_no_apic_vcpu;
 105
 106 static inline bool kvm_vcpu_has_lapic(struct kvm_vcpu *vcpu)
 107 {
 108         if (static_key_false(&kvm_no_apic_vcpu))
 109                 return vcpu->arch.apic;
 110         return true;
 111 }
 112
 113 extern struct static_key_deferred apic_hw_disabled;
 114
 115 static inline int kvm_apic_hw_enabled(struct kvm_lapic *apic)
 116 {
 117         if (static_key_false(&apic_hw_disabled.key))
 118                 return apic->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE;
 119         return MSR_IA32_APICBASE_ENABLE;
 120 }
 121
 122 extern struct static_key_deferred apic_sw_disabled;
 123
 124 static inline bool kvm_apic_sw_enabled(struct kvm_lapic *apic)
 125 {
 126         if (static_key_false(&apic_sw_disabled.key))
 127                 return apic->sw_enabled;
 128         return true;
 129 }
 130
 131 static inline bool kvm_apic_present(struct kvm_vcpu *vcpu)
 132 {
 133         return kvm_vcpu_has_lapic(vcpu) && kvm_apic_hw_enabled(vcpu->arch.apic);
 134 }
 135
 136 static inline int kvm_lapic_enabled(struct kvm_vcpu *vcpu)
 137 {
 138         return kvm_apic_present(vcpu) && kvm_apic_sw_enabled(vcpu->arch.apic);
 139 }
 140
 141 static inline int apic_x2apic_mode(struct kvm_lapic *apic)
 142 {
 143         return apic->vcpu->arch.apic_base & X2APIC_ENABLE;
 144 }
 145
 146 static inline bool kvm_vcpu_apicv_active(struct kvm_vcpu *vcpu)
 147 {
 148         return vcpu->arch.apic && vcpu->arch.apicv_active;
 149 }
 150
 151 static inline bool kvm_apic_has_events(struct kvm_vcpu *vcpu)
 152 {
 153         return kvm_vcpu_has_lapic(vcpu) && vcpu->arch.apic->pending_events;
 154 }
 155
 156 static inline bool kvm_lowest_prio_delivery(struct kvm_lapic_irq *irq)
 157 {
 158         return (irq->delivery_mode == APIC_DM_LOWEST ||
 159                         irq->msi_redir_hint);
 160 }
 161
 162 static inline int kvm_lapic_latched_init(struct kvm_vcpu *vcpu)
 163 {
 164         return kvm_vcpu_has_lapic(vcpu) && test_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events);
 165 }
 166
 167 static inline int kvm_apic_id(struct kvm_lapic *apic)
 168 {
 169         return (kvm_apic_get_reg(apic, APIC_ID) >> 24) & 0xff;
 170 }
 171
 172 bool kvm_apic_pending_eoi(struct kvm_vcpu *vcpu, int vector);
 173
 174 void wait_lapic_expire(struct kvm_vcpu *vcpu);
 175
 176 bool kvm_intr_is_single_vcpu_fast(struct kvm *kvm, struct kvm_lapic_irq *irq,
 177                         struct kvm_vcpu **dest_vcpu);
 178 #endif