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   1 #ifndef ASM_KVM_CACHE_REGS_H
   2 #define ASM_KVM_CACHE_REGS_H
   3
   4 static inline unsigned long kvm_register_read(struct kvm_vcpu *vcpu,
   5                                               enum kvm_reg reg)
   6 {
   7         if (!test_bit(reg, (unsigned long *)&vcpu->arch.regs_avail))
   8                 kvm_x86_ops->cache_reg(vcpu, reg);
   9
  10         return vcpu->arch.regs[reg];
  11 }
  12
  13 static inline void kvm_register_write(struct kvm_vcpu *vcpu,
  14                                       enum kvm_reg reg,
  15                                       unsigned long val)
  16 {
  17         vcpu->arch.regs[reg] = val;
  18         __set_bit(reg, (unsigned long *)&vcpu->arch.regs_dirty);
  19         __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
  20 }
  21
  22 static inline unsigned long kvm_rip_read(struct kvm_vcpu *vcpu)
  23 {
  24         return kvm_register_read(vcpu, VCPU_REGS_RIP);
  25 }
  26
  27 static inline void kvm_rip_write(struct kvm_vcpu *vcpu, unsigned long val)
  28 {
  29         kvm_register_write(vcpu, VCPU_REGS_RIP, val);
  30 }
  31
  32 static inline u64 kvm_pdptr_read(struct kvm_vcpu *vcpu, int index)
  33 {
  34         if (!test_bit(VCPU_EXREG_PDPTR,
  35                       (unsigned long *)&vcpu->arch.regs_avail))
  36                 kvm_x86_ops->cache_reg(vcpu, VCPU_EXREG_PDPTR);
  37
  38         return vcpu->arch.pdptrs[index];
  39 }
  40
  41 static inline ulong kvm_read_cr0_bits(struct kvm_vcpu *vcpu, ulong mask)
  42 {
  43         if (mask & vcpu->arch.cr0_guest_owned_bits)
  44                 kvm_x86_ops->decache_cr0_guest_bits(vcpu);
  45         return vcpu->arch.cr0 & mask;
  46 }
  47
  48 static inline ulong kvm_read_cr0(struct kvm_vcpu *vcpu)
  49 {
  50         return kvm_read_cr0_bits(vcpu, ~0UL);
  51 }
  52
  53 static inline ulong kvm_read_cr4_bits(struct kvm_vcpu *vcpu, ulong mask)
  54 {
  55         if (mask & vcpu->arch.cr4_guest_owned_bits)
  56                 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
  57         return vcpu->arch.cr4 & mask;
  58 }
  59
  60 static inline ulong kvm_read_cr4(struct kvm_vcpu *vcpu)
  61 {
  62         return kvm_read_cr4_bits(vcpu, ~0UL);
  63 }
  64
  65 #endif