arch/x86/kvm/lapic.h

   1 #ifndef __KVM_X86_LAPIC_H
   2 #define __KVM_X86_LAPIC_H
   3
   4 #include "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         atomic_t pending;                       /* accumulated triggered timers */
  18 };
  19
  20 struct kvm_lapic {
  21         unsigned long base_address;
  22         struct kvm_io_device dev;
  23         struct kvm_timer lapic_timer;
  24         u32 divide_count;
  25         struct kvm_vcpu *vcpu;
  26         bool sw_enabled;
  27         bool irr_pending;
  28         /* Number of bits set in ISR. */
  29         s16 isr_count;
  30         /* The highest vector set in ISR; if -1 - invalid, must scan ISR. */
  31         int highest_isr_cache;
  32         /**
  33          * APIC register page.  The layout matches the register layout seen by
  34          * the guest 1:1, because it is accessed by the vmx microcode.
  35          * Note: Only one register, the TPR, is used by the microcode.
  36          */
  37         void *regs;
  38         gpa_t vapic_addr;
  39         struct gfn_to_hva_cache vapic_cache;
  40         unsigned long pending_events;
  41         unsigned int sipi_vector;
  42 };
  43 int kvm_create_lapic(struct kvm_vcpu *vcpu);
  44 void kvm_free_lapic(struct kvm_vcpu *vcpu);
  45
  46 int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu);
  47 int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu);
  48 int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu);
  49 void kvm_apic_accept_events(struct kvm_vcpu *vcpu);
  50 void kvm_lapic_reset(struct kvm_vcpu *vcpu);
  51 u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu);
  52 void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8);
  53 void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu);
  54 void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value);
  55 u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu);
  56 void kvm_apic_set_version(struct kvm_vcpu *vcpu);
  57
  58 void kvm_apic_update_tmr(struct kvm_vcpu *vcpu, u32 *tmr);
  59 void kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir);
  60 int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u32 dest);
  61 int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u32 mda);
  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.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_apic_vid_enabled(struct kvm *kvm)
 147 {
 148         return kvm_x86_ops->vm_has_apicv(kvm);
 149 }
 150
 151 static inline u16 apic_cluster_id(struct kvm_apic_map *map, u32 ldr)
 152 {
 153         u16 cid;
 154         ldr >>= 32 - map->ldr_bits;
 155         cid = (ldr >> map->cid_shift) & map->cid_mask;
 156
 157         return cid;
 158 }
 159
 160 static inline u16 apic_logical_id(struct kvm_apic_map *map, u32 ldr)
 161 {
 162         ldr >>= (32 - map->ldr_bits);
 163         return ldr & map->lid_mask;
 164 }
 165
 166 static inline bool kvm_apic_has_events(struct kvm_vcpu *vcpu)
 167 {
 168         return vcpu->arch.apic->pending_events;
 169 }
 170
 171 bool kvm_apic_pending_eoi(struct kvm_vcpu *vcpu, int vector);
 172
 173 #endif