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Linux/arch/x86/kvm/x86.h

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  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 #define KVM_SUPPORTED_XCR0      (XSTATE_FP | XSTATE_SSE | XSTATE_YMM)
136 extern u64 host_xcr0;
137 
138 extern unsigned int min_timer_period_us;
139 
140 extern struct static_key kvm_no_apic_vcpu;
141 #endif
142 

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