/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. 

  2. #define ASM_KVM_CACHE_REGS_H
    3. 

  3. 

  4. #define KVM_POSSIBLE_CR0_GUEST_BITS X86_CR0_TS
    5. 

  5. #define KVM_POSSIBLE_CR4_GUEST_BITS				  \
    6. 

  6. 	(X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR  \
    7. 

  7. 	 | X86_CR4_OSXMMEXCPT | X86_CR4_PGE)
    8. 

  8. 

  9. static inline unsigned long kvm_register_read(struct kvm_vcpu *vcpu,
    10. 

  10. 					      enum kvm_reg reg)
    11. 

  11. {
    12. 

  12. 	if (!test_bit(reg, (unsigned long *)&vcpu->arch.regs_avail))
    13. 

  13. 		kvm_x86_ops->cache_reg(vcpu, reg);
    14. 

  14. 

  15. 	return vcpu->arch.regs[reg];
    16. 

  16. }
    17. 

  17. 

  18. static inline void kvm_register_write(struct kvm_vcpu *vcpu,
    19. 

  19. 				      enum kvm_reg reg,
    20. 

  20. 				      unsigned long val)
    21. 

  21. {
    22. 

  22. 	vcpu->arch.regs[reg] = val;
    23. 

  23. 	__set_bit(reg, (unsigned long *)&vcpu->arch.regs_dirty);
    24. 

  24. 	__set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
    25. 

  25. }
    26. 

  26. 

  27. static inline unsigned long kvm_rip_read(struct kvm_vcpu *vcpu)
    28. 

  28. {
    29. 

  29. 	return kvm_register_read(vcpu, VCPU_REGS_RIP);
    30. 

  30. }
    31. 

  31. 

  32. static inline void kvm_rip_write(struct kvm_vcpu *vcpu, unsigned long val)
    33. 

  33. {
    34. 

  34. 	kvm_register_write(vcpu, VCPU_REGS_RIP, val);
    35. 

  35. }
    36. 

  36. 

  37. static inline u64 kvm_pdptr_read(struct kvm_vcpu *vcpu, int index)
    38. 

  38. {
    39. 

  39. 	if (!test_bit(VCPU_EXREG_PDPTR,
    40. 

  40. 		      (unsigned long *)&vcpu->arch.regs_avail))
    41. 

  41. 		kvm_x86_ops->cache_reg(vcpu, VCPU_EXREG_PDPTR);
    42. 

  42. 

  43. 	return vcpu->arch.pdptrs[index];
    44. 

  44. }
    45. 

  45. 

  46. static inline ulong kvm_read_cr0_bits(struct kvm_vcpu *vcpu, ulong mask)
    47. 

  47. {
    48. 

  48. 	ulong tmask = mask & KVM_POSSIBLE_CR0_GUEST_BITS;
    49. 

  49. 	if (tmask & vcpu->arch.cr0_guest_owned_bits)
    50. 

  50. 		kvm_x86_ops->decache_cr0_guest_bits(vcpu);
    51. 

  51. 	return vcpu->arch.cr0 & mask;
    52. 

  52. }
    53. 

  53. 

  54. static inline ulong kvm_read_cr0(struct kvm_vcpu *vcpu)
    55. 

  55. {
    56. 

  56. 	return kvm_read_cr0_bits(vcpu, ~0UL);
    57. 

  57. }
    58. 

  58. 

  59. static inline ulong kvm_read_cr4_bits(struct kvm_vcpu *vcpu, ulong mask)
    60. 

  60. {
    61. 

  61. 	ulong tmask = mask & KVM_POSSIBLE_CR4_GUEST_BITS;
    62. 

  62. 	if (tmask & vcpu->arch.cr4_guest_owned_bits)
    63. 

  63. 		kvm_x86_ops->decache_cr4_guest_bits(vcpu);
    64. 

  64. 	return vcpu->arch.cr4 & mask;
    65. 

  65. }
    66. 

  66. 

  67. static inline ulong kvm_read_cr4(struct kvm_vcpu *vcpu)
    68. 

  68. {
    69. 

  69. 	return kvm_read_cr4_bits(vcpu, ~0UL);
    70. 

  70. }
    71. 

  71. 

  72. #endif
    73.