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 page *vapic_page;
  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 int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest);
  57 int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda);
  58 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq);
  59 int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type);
  60
  61 bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
  62                 struct kvm_lapic_irq *irq, int *r);
  63
  64 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu);
  65 void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data);
  66 void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu,
  67                 struct kvm_lapic_state *s);
  68 int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu);
  69
  70 u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu);
  71 void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data);
  72
  73 void kvm_apic_write_nodecode(struct kvm_vcpu *vcpu, u32 offset);
  74 void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector);
  75
  76 void kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr);
  77 void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu);
  78 void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu);
  79
  80 int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
  81 int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
  82
  83 int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
  84 int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
  85
  86 static inline bool kvm_hv_vapic_assist_page_enabled(struct kvm_vcpu *vcpu)
  87 {
  88         return vcpu->arch.hv_vapic & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE;
  89 }
  90
  91 int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data);
  92 void kvm_lapic_init(void);
  93
  94 static inline u32 kvm_apic_get_reg(struct kvm_lapic *apic, int reg_off)
  95 {
  96                 return *((u32 *) (apic->regs + reg_off));
  97 }
  98
  99 extern struct static_key kvm_no_apic_vcpu;
 100
 101 static inline bool kvm_vcpu_has_lapic(struct kvm_vcpu *vcpu)
 102 {
 103         if (static_key_false(&kvm_no_apic_vcpu))
 104                 return vcpu->arch.apic;
 105         return true;
 106 }
 107
 108 extern struct static_key_deferred apic_hw_disabled;
 109
 110 static inline int kvm_apic_hw_enabled(struct kvm_lapic *apic)
 111 {
 112         if (static_key_false(&apic_hw_disabled.key))
 113                 return apic->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE;
 114         return MSR_IA32_APICBASE_ENABLE;
 115 }
 116
 117 extern struct static_key_deferred apic_sw_disabled;
 118
 119 static inline int kvm_apic_sw_enabled(struct kvm_lapic *apic)
 120 {
 121         if (static_key_false(&apic_sw_disabled.key))
 122                 return kvm_apic_get_reg(apic, APIC_SPIV) & APIC_SPIV_APIC_ENABLED;
 123         return APIC_SPIV_APIC_ENABLED;
 124 }
 125
 126 static inline bool kvm_apic_present(struct kvm_vcpu *vcpu)
 127 {
 128         return kvm_vcpu_has_lapic(vcpu) && kvm_apic_hw_enabled(vcpu->arch.apic);
 129 }
 130
 131 static inline int kvm_lapic_enabled(struct kvm_vcpu *vcpu)
 132 {
 133         return kvm_apic_present(vcpu) && kvm_apic_sw_enabled(vcpu->arch.apic);
 134 }
 135
 136 static inline int apic_x2apic_mode(struct kvm_lapic *apic)
 137 {
 138         return apic->vcpu->arch.apic_base & X2APIC_ENABLE;
 139 }
 140
 141 static inline bool kvm_apic_vid_enabled(struct kvm *kvm)
 142 {
 143         return kvm_x86_ops->vm_has_apicv(kvm);
 144 }
 145
 146 static inline u16 apic_cluster_id(struct kvm_apic_map *map, u32 ldr)
 147 {
 148         u16 cid;
 149         ldr >>= 32 - map->ldr_bits;
 150         cid = (ldr >> map->cid_shift) & map->cid_mask;
 151
 152         BUG_ON(cid >= ARRAY_SIZE(map->logical_map));
 153
 154         return cid;
 155 }
 156
 157 static inline u16 apic_logical_id(struct kvm_apic_map *map, u32 ldr)
 158 {
 159         ldr >>= (32 - map->ldr_bits);
 160         return ldr & map->lid_mask;
 161 }
 162
 163 static inline bool kvm_apic_has_events(struct kvm_vcpu *vcpu)
 164 {
 165         return vcpu->arch.apic->pending_events;
 166 }
 167
 168 #endif