/arch/x86/kvm/kvm_cache_regs.h

https://bitbucket.org/thekraven/iscream_thunderc-2.6.35 · C++ Header · 72 lines · 59 code · 13 blank · 0 comment · 4 complexity · 11f27e44f28e88092097a31e1757b6e2 MD5 · raw file

  1. #ifndef ASM_KVM_CACHE_REGS_H
  2. #define ASM_KVM_CACHE_REGS_H
  3. #define KVM_POSSIBLE_CR0_GUEST_BITS X86_CR0_TS
  4. #define KVM_POSSIBLE_CR4_GUEST_BITS \
  5. (X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR \
  6. | X86_CR4_OSXMMEXCPT | X86_CR4_PGE)
  7. static inline unsigned long kvm_register_read(struct kvm_vcpu *vcpu,
  8. enum kvm_reg reg)
  9. {
  10. if (!test_bit(reg, (unsigned long *)&vcpu->arch.regs_avail))
  11. kvm_x86_ops->cache_reg(vcpu, reg);
  12. return vcpu->arch.regs[reg];
  13. }
  14. static inline void kvm_register_write(struct kvm_vcpu *vcpu,
  15. enum kvm_reg reg,
  16. unsigned long val)
  17. {
  18. vcpu->arch.regs[reg] = val;
  19. __set_bit(reg, (unsigned long *)&vcpu->arch.regs_dirty);
  20. __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
  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. static inline void kvm_rip_write(struct kvm_vcpu *vcpu, unsigned long val)
  27. {
  28. kvm_register_write(vcpu, VCPU_REGS_RIP, val);
  29. }
  30. static inline u64 kvm_pdptr_read(struct kvm_vcpu *vcpu, int index)
  31. {
  32. if (!test_bit(VCPU_EXREG_PDPTR,
  33. (unsigned long *)&vcpu->arch.regs_avail))
  34. kvm_x86_ops->cache_reg(vcpu, VCPU_EXREG_PDPTR);
  35. return vcpu->arch.pdptrs[index];
  36. }
  37. static inline ulong kvm_read_cr0_bits(struct kvm_vcpu *vcpu, ulong mask)
  38. {
  39. ulong tmask = mask & KVM_POSSIBLE_CR0_GUEST_BITS;
  40. if (tmask & vcpu->arch.cr0_guest_owned_bits)
  41. kvm_x86_ops->decache_cr0_guest_bits(vcpu);
  42. return vcpu->arch.cr0 & mask;
  43. }
  44. static inline ulong kvm_read_cr0(struct kvm_vcpu *vcpu)
  45. {
  46. return kvm_read_cr0_bits(vcpu, ~0UL);
  47. }
  48. static inline ulong kvm_read_cr4_bits(struct kvm_vcpu *vcpu, ulong mask)
  49. {
  50. ulong tmask = mask & KVM_POSSIBLE_CR4_GUEST_BITS;
  51. if (tmask & vcpu->arch.cr4_guest_owned_bits)
  52. kvm_x86_ops->decache_cr4_guest_bits(vcpu);
  53. return vcpu->arch.cr4 & mask;
  54. }
  55. static inline ulong kvm_read_cr4(struct kvm_vcpu *vcpu)
  56. {
  57. return kvm_read_cr4_bits(vcpu, ~0UL);
  58. }
  59. #endif