1 #ifndef ASM_KVM_CACHE_REGS_H 2 #define ASM_KVM_CACHE_REGS_H 3 4 #define KVM_POSSIBLE_CR0_GUEST_BITS X86_CR0_TS 5 #define KVM_POSSIBLE_CR4_GUEST_BITS \ 6 (X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR \ 7 | X86_CR4_OSXMMEXCPT | X86_CR4_PGE) 8 9 static inline unsigned long kvm_register_read(struct kvm_vcpu *vcpu, 10 enum kvm_reg reg) 11 { 12 if (!test_bit(reg, (unsigned long *)&vcpu->arch.regs_avail)) 13 kvm_x86_ops->cache_reg(vcpu, reg); 14 15 return vcpu->arch.regs[reg]; 16 } 17 18 static inline void kvm_register_write(struct kvm_vcpu *vcpu, 19 enum kvm_reg reg, 20 unsigned long val) 21 { 22 vcpu->arch.regs[reg] = val; 23 __set_bit(reg, (unsigned long *)&vcpu->arch.regs_dirty); 24 __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail); 25 } 26 27 static inline unsigned long kvm_rip_read(struct kvm_vcpu *vcpu) 28 { 29 return kvm_register_read(vcpu, VCPU_REGS_RIP); 30 } 31 32 static inline void kvm_rip_write(struct kvm_vcpu *vcpu, unsigned long val) 33 { 34 kvm_register_write(vcpu, VCPU_REGS_RIP, val); 35 } 36 37 static inline u64 kvm_pdptr_read(struct kvm_vcpu *vcpu, int index) 38 { 39 might_sleep(); /* on svm */ 40 41 if (!test_bit(VCPU_EXREG_PDPTR, 42 (unsigned long *)&vcpu->arch.regs_avail)) 43 kvm_x86_ops->cache_reg(vcpu, VCPU_EXREG_PDPTR); 44 45 return vcpu->arch.walk_mmu->pdptrs[index]; 46 } 47 48 static inline ulong kvm_read_cr0_bits(struct kvm_vcpu *vcpu, ulong mask) 49 { 50 ulong tmask = mask & KVM_POSSIBLE_CR0_GUEST_BITS; 51 if (tmask & vcpu->arch.cr0_guest_owned_bits) 52 kvm_x86_ops->decache_cr0_guest_bits(vcpu); 53 return vcpu->arch.cr0 & mask; 54 } 55 56 static inline ulong kvm_read_cr0(struct kvm_vcpu *vcpu) 57 { 58 return kvm_read_cr0_bits(vcpu, ~0UL); 59 } 60 61 static inline ulong kvm_read_cr4_bits(struct kvm_vcpu *vcpu, ulong mask) 62 { 63 ulong tmask = mask & KVM_POSSIBLE_CR4_GUEST_BITS; 64 if (tmask & vcpu->arch.cr4_guest_owned_bits) 65 kvm_x86_ops->decache_cr4_guest_bits(vcpu); 66 return vcpu->arch.cr4 & mask; 67 } 68 69 static inline ulong kvm_read_cr3(struct kvm_vcpu *vcpu) 70 { 71 if (!test_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail)) 72 kvm_x86_ops->decache_cr3(vcpu); 73 return vcpu->arch.cr3; 74 } 75 76 static inline ulong kvm_read_cr4(struct kvm_vcpu *vcpu) 77 { 78 return kvm_read_cr4_bits(vcpu, ~0UL); 79 } 80 81 static inline u64 kvm_read_edx_eax(struct kvm_vcpu *vcpu) 82 { 83 return (kvm_register_read(vcpu, VCPU_REGS_RAX) & -1u) 84 | ((u64)(kvm_register_read(vcpu, VCPU_REGS_RDX) & -1u) << 32); 85 } 86 87 static inline void enter_guest_mode(struct kvm_vcpu *vcpu) 88 { 89 vcpu->arch.hflags |= HF_GUEST_MASK; 90 } 91 92 static inline void leave_guest_mode(struct kvm_vcpu *vcpu) 93 { 94 vcpu->arch.hflags &= ~HF_GUEST_MASK; 95 } 96 97 static inline bool is_guest_mode(struct kvm_vcpu *vcpu) 98 { 99 return vcpu->arch.hflags & HF_GUEST_MASK; 100 } 101 102 #endif 103