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 struct kvm_timer {
   9         struct hrtimer timer;
  10         s64 period;                             /* unit: ns */
  11         u32 timer_mode_mask;
  12         u64 tscdeadline;
  13         atomic_t pending;                       /* accumulated triggered timers */
  14 };
  15
  16 struct kvm_lapic {
  17         unsigned long base_address;
  18         struct kvm_io_device dev;
  19         struct kvm_timer lapic_timer;
  20         u32 divide_count;
  21         struct kvm_vcpu *vcpu;
  22         bool irr_pending;
  23         /* Number of bits set in ISR. */
  24         s16 isr_count;
  25         /* The highest vector set in ISR; if -1 - invalid, must scan ISR. */
  26         int highest_isr_cache;
  27         /**
  28          * APIC register page.  The layout matches the register layout seen by
  29          * the guest 1:1, because it is accessed by the vmx microcode.
  30          * Note: Only one register, the TPR, is used by the microcode.
  31          */
  32         void *regs;
  33         gpa_t vapic_addr;
  34         struct page *vapic_page;
  35 };
  36 int kvm_create_lapic(struct kvm_vcpu *vcpu);
  37 void kvm_free_lapic(struct kvm_vcpu *vcpu);
  38
  39 int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu);
  40 int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu);
  41 int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu);
  42 void kvm_lapic_reset(struct kvm_vcpu *vcpu);
  43 u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu);
  44 void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8);
  45 void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu);
  46 void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value);
  47 u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu);
  48 void kvm_apic_set_version(struct kvm_vcpu *vcpu);
  49
  50 int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest);
  51 int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda);
  52 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq);
  53 int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type);
  54
  55 bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
  56                 struct kvm_lapic_irq *irq, int *r);
  57
  58 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu);
  59 void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data);
  60 void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu,
  61                 struct kvm_lapic_state *s);
  62 int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu);
  63
  64 u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu);
  65 void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data);
  66
  67 void kvm_apic_write_nodecode(struct kvm_vcpu *vcpu, u32 offset);
  68
  69 void kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr);
  70 void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu);
  71 void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu);
  72
  73 int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
  74 int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
  75
  76 int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
  77 int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
  78
  79 static inline bool kvm_hv_vapic_assist_page_enabled(struct kvm_vcpu *vcpu)
  80 {
  81         return vcpu->arch.hv_vapic & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE;
  82 }
  83
  84 int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data);
  85 void kvm_lapic_init(void);
  86
  87 static inline u32 kvm_apic_get_reg(struct kvm_lapic *apic, int reg_off)
  88 {
  89                 return *((u32 *) (apic->regs + reg_off));
  90 }
  91
  92 extern struct static_key kvm_no_apic_vcpu;
  93
  94 static inline bool kvm_vcpu_has_lapic(struct kvm_vcpu *vcpu)
  95 {
  96         if (static_key_false(&kvm_no_apic_vcpu))
  97                 return vcpu->arch.apic;
  98         return true;
  99 }
 100
 101 extern struct static_key_deferred apic_hw_disabled;
 102
 103 static inline int kvm_apic_hw_enabled(struct kvm_lapic *apic)
 104 {
 105         if (static_key_false(&apic_hw_disabled.key))
 106                 return apic->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE;
 107         return MSR_IA32_APICBASE_ENABLE;
 108 }
 109
 110 extern struct static_key_deferred apic_sw_disabled;
 111
 112 static inline int kvm_apic_sw_enabled(struct kvm_lapic *apic)
 113 {
 114         if (static_key_false(&apic_sw_disabled.key))
 115                 return kvm_apic_get_reg(apic, APIC_SPIV) & APIC_SPIV_APIC_ENABLED;
 116         return APIC_SPIV_APIC_ENABLED;
 117 }
 118
 119 static inline bool kvm_apic_present(struct kvm_vcpu *vcpu)
 120 {
 121         return kvm_vcpu_has_lapic(vcpu) && kvm_apic_hw_enabled(vcpu->arch.apic);
 122 }
 123
 124 static inline int kvm_lapic_enabled(struct kvm_vcpu *vcpu)
 125 {
 126         return kvm_apic_present(vcpu) && kvm_apic_sw_enabled(vcpu->arch.apic);
 127 }
 128
 129 #endif