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_mask;
  15         u64 tscdeadline;
  16         atomic_t pending;                       /* accumulated triggered timers */
  17 };
  18
  19 struct kvm_lapic {
  20         unsigned long base_address;
  21         struct kvm_io_device dev;
  22         struct kvm_timer lapic_timer;
  23         u32 divide_count;
  24         struct kvm_vcpu *vcpu;
  25         bool irr_pending;
  26         /* Number of bits set in ISR. */
  27         s16 isr_count;
  28         /* The highest vector set in ISR; if -1 - invalid, must scan ISR. */
  29         int highest_isr_cache;
  30         /**
  31          * APIC register page.  The layout matches the register layout seen by
  32          * the guest 1:1, because it is accessed by the vmx microcode.
  33          * Note: Only one register, the TPR, is used by the microcode.
  34          */
  35         void *regs;
  36         gpa_t vapic_addr;
  37         struct gfn_to_hva_cache vapic_cache;
  38         unsigned long pending_events;
  39         unsigned int sipi_vector;
  40 };
  41 int kvm_create_lapic(struct kvm_vcpu *vcpu);
  42 void kvm_free_lapic(struct kvm_vcpu *vcpu);
  43
  44 int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu);
  45 int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu);
  46 int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu);
  47 void kvm_apic_accept_events(struct kvm_vcpu *vcpu);
  48 void kvm_lapic_reset(struct kvm_vcpu *vcpu);
  49 u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu);
  50 void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8);
  51 void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu);
  52 void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value);
  53 u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu);
  54 void kvm_apic_set_version(struct kvm_vcpu *vcpu);
  55
  56 void kvm_apic_update_tmr(struct kvm_vcpu *vcpu, u32 *tmr);
  57 void kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir);
  58 int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest);
  59 int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda);
  60 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq,
  61                 unsigned long *dest_map);
  62 int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type);
  63
  64 bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
  65                 struct kvm_lapic_irq *irq, int *r, unsigned long *dest_map);
  66
  67 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu);
  68 void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data);
  69 void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu,
  70                 struct kvm_lapic_state *s);
  71 int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu);
  72
  73 u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu);
  74 void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data);
  75
  76 void kvm_apic_write_nodecode(struct kvm_vcpu *vcpu, u32 offset);
  77 void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector);
  78
  79 int kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr);
  80 void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu);
  81 void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu);
  82
  83 int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
  84 int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
  85
  86 int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
  87 int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
  88
  89 static inline bool kvm_hv_vapic_assist_page_enabled(struct kvm_vcpu *vcpu)
  90 {
  91         return vcpu->arch.hv_vapic & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE;
  92 }
  93
  94 int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data);
  95 void kvm_lapic_init(void);
  96
  97 static inline u32 kvm_apic_get_reg(struct kvm_lapic *apic, int reg_off)
  98 {
  99                 return *((u32 *) (apic->regs + reg_off));
 100 }
 101
 102 extern struct static_key kvm_no_apic_vcpu;
 103
 104 static inline bool kvm_vcpu_has_lapic(struct kvm_vcpu *vcpu)
 105 {
 106         if (static_key_false(&kvm_no_apic_vcpu))
 107                 return vcpu->arch.apic;
 108         return true;
 109 }
 110
 111 extern struct static_key_deferred apic_hw_disabled;
 112
 113 static inline int kvm_apic_hw_enabled(struct kvm_lapic *apic)
 114 {
 115         if (static_key_false(&apic_hw_disabled.key))
 116                 return apic->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE;
 117         return MSR_IA32_APICBASE_ENABLE;
 118 }
 119
 120 extern struct static_key_deferred apic_sw_disabled;
 121
 122 static inline int kvm_apic_sw_enabled(struct kvm_lapic *apic)
 123 {
 124         if (static_key_false(&apic_sw_disabled.key))
 125                 return kvm_apic_get_reg(apic, APIC_SPIV) & APIC_SPIV_APIC_ENABLED;
 126         return APIC_SPIV_APIC_ENABLED;
 127 }
 128
 129 static inline bool kvm_apic_present(struct kvm_vcpu *vcpu)
 130 {
 131         return kvm_vcpu_has_lapic(vcpu) && kvm_apic_hw_enabled(vcpu->arch.apic);
 132 }
 133
 134 static inline int kvm_lapic_enabled(struct kvm_vcpu *vcpu)
 135 {
 136         return kvm_apic_present(vcpu) && kvm_apic_sw_enabled(vcpu->arch.apic);
 137 }
 138
 139 static inline int apic_x2apic_mode(struct kvm_lapic *apic)
 140 {
 141         return apic->vcpu->arch.apic_base & X2APIC_ENABLE;
 142 }
 143
 144 static inline bool kvm_apic_vid_enabled(struct kvm *kvm)
 145 {
 146         return kvm_x86_ops->vm_has_apicv(kvm);
 147 }
 148
 149 static inline u16 apic_cluster_id(struct kvm_apic_map *map, u32 ldr)
 150 {
 151         u16 cid;
 152         ldr >>= 32 - map->ldr_bits;
 153         cid = (ldr >> map->cid_shift) & map->cid_mask;
 154
 155         BUG_ON(cid >= ARRAY_SIZE(map->logical_map));
 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