arch/x86/kvm/x86.h

   1 #ifndef ARCH_X86_KVM_X86_H
   2 #define ARCH_X86_KVM_X86_H
   3
   4 #include <linux/kvm_host.h>
   5 #include "kvm_cache_regs.h"
   6
   7 static inline void kvm_clear_exception_queue(struct kvm_vcpu *vcpu)
   8 {
   9         vcpu->arch.exception.pending = false;
  10 }
  11
  12 static inline void kvm_queue_interrupt(struct kvm_vcpu *vcpu, u8 vector,
  13         bool soft)
  14 {
  15         vcpu->arch.interrupt.pending = true;
  16         vcpu->arch.interrupt.soft = soft;
  17         vcpu->arch.interrupt.nr = vector;
  18 }
  19
  20 static inline void kvm_clear_interrupt_queue(struct kvm_vcpu *vcpu)
  21 {
  22         vcpu->arch.interrupt.pending = false;
  23 }
  24
  25 static inline bool kvm_event_needs_reinjection(struct kvm_vcpu *vcpu)
  26 {
  27         return vcpu->arch.exception.pending || vcpu->arch.interrupt.pending ||
  28                 vcpu->arch.nmi_injected;
  29 }
  30
  31 static inline bool kvm_exception_is_soft(unsigned int nr)
  32 {
  33         return (nr == BP_VECTOR) || (nr == OF_VECTOR);
  34 }
  35
  36 static inline bool is_protmode(struct kvm_vcpu *vcpu)
  37 {
  38         return kvm_read_cr0_bits(vcpu, X86_CR0_PE);
  39 }
  40
  41 static inline int is_long_mode(struct kvm_vcpu *vcpu)
  42 {
  43 #ifdef CONFIG_X86_64
  44         return vcpu->arch.efer & EFER_LMA;
  45 #else
  46         return 0;
  47 #endif
  48 }
  49
  50 static inline bool mmu_is_nested(struct kvm_vcpu *vcpu)
  51 {
  52         return vcpu->arch.walk_mmu == &vcpu->arch.nested_mmu;
  53 }
  54
  55 static inline int is_pae(struct kvm_vcpu *vcpu)
  56 {
  57         return kvm_read_cr4_bits(vcpu, X86_CR4_PAE);
  58 }
  59
  60 static inline int is_pse(struct kvm_vcpu *vcpu)
  61 {
  62         return kvm_read_cr4_bits(vcpu, X86_CR4_PSE);
  63 }
  64
  65 static inline int is_paging(struct kvm_vcpu *vcpu)
  66 {
  67         return likely(kvm_read_cr0_bits(vcpu, X86_CR0_PG));
  68 }
  69
  70 static inline u32 bit(int bitno)
  71 {
  72         return 1 << (bitno & 31);
  73 }
  74
  75 static inline void vcpu_cache_mmio_info(struct kvm_vcpu *vcpu,
  76                                         gva_t gva, gfn_t gfn, unsigned access)
  77 {
  78         vcpu->arch.mmio_gva = gva & PAGE_MASK;
  79         vcpu->arch.access = access;
  80         vcpu->arch.mmio_gfn = gfn;
  81         vcpu->arch.mmio_gen = kvm_memslots(vcpu->kvm)->generation;
  82 }
  83
  84 static inline bool vcpu_match_mmio_gen(struct kvm_vcpu *vcpu)
  85 {
  86         return vcpu->arch.mmio_gen == kvm_memslots(vcpu->kvm)->generation;
  87 }
  88
  89 /*
  90  * Clear the mmio cache info for the given gva. If gva is MMIO_GVA_ANY, we
  91  * clear all mmio cache info.
  92  */
  93 #define MMIO_GVA_ANY (~(gva_t)0)
  94
  95 static inline void vcpu_clear_mmio_info(struct kvm_vcpu *vcpu, gva_t gva)
  96 {
  97         if (gva != MMIO_GVA_ANY && vcpu->arch.mmio_gva != (gva & PAGE_MASK))
  98                 return;
  99
 100         vcpu->arch.mmio_gva = 0;
 101 }
 102
 103 static inline bool vcpu_match_mmio_gva(struct kvm_vcpu *vcpu, unsigned long gva)
 104 {
 105         if (vcpu_match_mmio_gen(vcpu) && vcpu->arch.mmio_gva &&
 106               vcpu->arch.mmio_gva == (gva & PAGE_MASK))
 107                 return true;
 108
 109         return false;
 110 }
 111
 112 static inline bool vcpu_match_mmio_gpa(struct kvm_vcpu *vcpu, gpa_t gpa)
 113 {
 114         if (vcpu_match_mmio_gen(vcpu) && vcpu->arch.mmio_gfn &&
 115               vcpu->arch.mmio_gfn == gpa >> PAGE_SHIFT)
 116                 return true;
 117
 118         return false;
 119 }
 120
 121 void kvm_before_handle_nmi(struct kvm_vcpu *vcpu);
 122 void kvm_after_handle_nmi(struct kvm_vcpu *vcpu);
 123 int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip);
 124
 125 void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr);
 126
 127 int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt,
 128         gva_t addr, void *val, unsigned int bytes,
 129         struct x86_exception *exception);
 130
 131 int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt,
 132         gva_t addr, void *val, unsigned int bytes,
 133         struct x86_exception *exception);
 134
 135 bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 136
 137 extern u64 host_xcr0;
 138
 139 extern unsigned int min_timer_period_us;
 140
 141 extern struct static_key kvm_no_apic_vcpu;
 142 #endif