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 9static 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 18static 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 27static inline unsigned long kvm_rip_read(struct kvm_vcpu *vcpu) 28{ 29 return kvm_register_read(vcpu, VCPU_REGS_RIP); 30} 31 32static inline void kvm_rip_write(struct kvm_vcpu *vcpu, unsigned long val) 33{ 34 kvm_register_write(vcpu, VCPU_REGS_RIP, val); 35} 36 37static 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.pdptrs[index]; 46} 47 48static 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 56static inline ulong kvm_read_cr0(struct kvm_vcpu *vcpu) 57{ 58 return kvm_read_cr0_bits(vcpu, ~0UL); 59} 60 61static 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 69static inline ulong kvm_read_cr4(struct kvm_vcpu *vcpu) 70{ 71 return kvm_read_cr4_bits(vcpu, ~0UL); 72} 73 74static inline u64 kvm_read_edx_eax(struct kvm_vcpu *vcpu) 75{ 76 return (kvm_register_read(vcpu, VCPU_REGS_RAX) & -1u) 77 | ((u64)(kvm_register_read(vcpu, VCPU_REGS_RDX) & -1u) << 32); 78} 79 80#endif 81