1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef ASM_KVM_CACHE_REGS_H 3 #define ASM_KVM_CACHE_REGS_H 4 5 #include <linux/kvm_host.h> 6 7 #define KVM_POSSIBLE_CR0_GUEST_BITS X86_CR0_TS 8 #define KVM_POSSIBLE_CR4_GUEST_BITS \ 9 (X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR \ 10 | X86_CR4_OSXMMEXCPT | X86_CR4_LA57 | X86_CR4_PGE) 11 12 #define BUILD_KVM_GPR_ACCESSORS(lname, uname) \ 13 static __always_inline unsigned long kvm_##lname##_read(struct kvm_vcpu *vcpu)\ 14 { \ 15 return vcpu->arch.regs[VCPU_REGS_##uname]; \ 16 } \ 17 static __always_inline void kvm_##lname##_write(struct kvm_vcpu *vcpu, \ 18 unsigned long val) \ 19 { \ 20 vcpu->arch.regs[VCPU_REGS_##uname] = val; \ 21 } 22 BUILD_KVM_GPR_ACCESSORS(rax, RAX) 23 BUILD_KVM_GPR_ACCESSORS(rbx, RBX) 24 BUILD_KVM_GPR_ACCESSORS(rcx, RCX) 25 BUILD_KVM_GPR_ACCESSORS(rdx, RDX) 26 BUILD_KVM_GPR_ACCESSORS(rbp, RBP) 27 BUILD_KVM_GPR_ACCESSORS(rsi, RSI) 28 BUILD_KVM_GPR_ACCESSORS(rdi, RDI) 29 #ifdef CONFIG_X86_64 30 BUILD_KVM_GPR_ACCESSORS(r8, R8) 31 BUILD_KVM_GPR_ACCESSORS(r9, R9) 32 BUILD_KVM_GPR_ACCESSORS(r10, R10) 33 BUILD_KVM_GPR_ACCESSORS(r11, R11) 34 BUILD_KVM_GPR_ACCESSORS(r12, R12) 35 BUILD_KVM_GPR_ACCESSORS(r13, R13) 36 BUILD_KVM_GPR_ACCESSORS(r14, R14) 37 BUILD_KVM_GPR_ACCESSORS(r15, R15) 38 #endif 39 40 static inline unsigned long kvm_register_read(struct kvm_vcpu *vcpu, 41 enum kvm_reg reg) 42 { 43 if (!test_bit(reg, (unsigned long *)&vcpu->arch.regs_avail)) 44 kvm_x86_ops->cache_reg(vcpu, reg); 45 46 return vcpu->arch.regs[reg]; 47 } 48 49 static inline void kvm_register_write(struct kvm_vcpu *vcpu, 50 enum kvm_reg reg, 51 unsigned long val) 52 { 53 vcpu->arch.regs[reg] = val; 54 __set_bit(reg, (unsigned long *)&vcpu->arch.regs_dirty); 55 __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail); 56 } 57 58 static inline unsigned long kvm_rip_read(struct kvm_vcpu *vcpu) 59 { 60 return kvm_register_read(vcpu, VCPU_REGS_RIP); 61 } 62 63 static inline void kvm_rip_write(struct kvm_vcpu *vcpu, unsigned long val) 64 { 65 kvm_register_write(vcpu, VCPU_REGS_RIP, val); 66 } 67 68 static inline unsigned long kvm_rsp_read(struct kvm_vcpu *vcpu) 69 { 70 return kvm_register_read(vcpu, VCPU_REGS_RSP); 71 } 72 73 static inline void kvm_rsp_write(struct kvm_vcpu *vcpu, unsigned long val) 74 { 75 kvm_register_write(vcpu, VCPU_REGS_RSP, val); 76 } 77 78 static inline u64 kvm_pdptr_read(struct kvm_vcpu *vcpu, int index) 79 { 80 might_sleep(); /* on svm */ 81 82 if (!test_bit(VCPU_EXREG_PDPTR, 83 (unsigned long *)&vcpu->arch.regs_avail)) 84 kvm_x86_ops->cache_reg(vcpu, (enum kvm_reg)VCPU_EXREG_PDPTR); 85 86 return vcpu->arch.walk_mmu->pdptrs[index]; 87 } 88 89 static inline ulong kvm_read_cr0_bits(struct kvm_vcpu *vcpu, ulong mask) 90 { 91 ulong tmask = mask & KVM_POSSIBLE_CR0_GUEST_BITS; 92 if (tmask & vcpu->arch.cr0_guest_owned_bits) 93 kvm_x86_ops->decache_cr0_guest_bits(vcpu); 94 return vcpu->arch.cr0 & mask; 95 } 96 97 static inline ulong kvm_read_cr0(struct kvm_vcpu *vcpu) 98 { 99 return kvm_read_cr0_bits(vcpu, ~0UL); 100 } 101 102 static inline ulong kvm_read_cr4_bits(struct kvm_vcpu *vcpu, ulong mask) 103 { 104 ulong tmask = mask & KVM_POSSIBLE_CR4_GUEST_BITS; 105 if (tmask & vcpu->arch.cr4_guest_owned_bits) 106 kvm_x86_ops->decache_cr4_guest_bits(vcpu); 107 return vcpu->arch.cr4 & mask; 108 } 109 110 static inline ulong kvm_read_cr3(struct kvm_vcpu *vcpu) 111 { 112 if (!test_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail)) 113 kvm_x86_ops->decache_cr3(vcpu); 114 return vcpu->arch.cr3; 115 } 116 117 static inline ulong kvm_read_cr4(struct kvm_vcpu *vcpu) 118 { 119 return kvm_read_cr4_bits(vcpu, ~0UL); 120 } 121 122 static inline u64 kvm_read_edx_eax(struct kvm_vcpu *vcpu) 123 { 124 return (kvm_rax_read(vcpu) & -1u) 125 | ((u64)(kvm_rdx_read(vcpu) & -1u) << 32); 126 } 127 128 static inline void enter_guest_mode(struct kvm_vcpu *vcpu) 129 { 130 vcpu->arch.hflags |= HF_GUEST_MASK; 131 } 132 133 static inline void leave_guest_mode(struct kvm_vcpu *vcpu) 134 { 135 vcpu->arch.hflags &= ~HF_GUEST_MASK; 136 137 if (vcpu->arch.load_eoi_exitmap_pending) { 138 vcpu->arch.load_eoi_exitmap_pending = false; 139 kvm_make_request(KVM_REQ_LOAD_EOI_EXITMAP, vcpu); 140 } 141 } 142 143 static inline bool is_guest_mode(struct kvm_vcpu *vcpu) 144 { 145 return vcpu->arch.hflags & HF_GUEST_MASK; 146 } 147 148 static inline bool is_smm(struct kvm_vcpu *vcpu) 149 { 150 return vcpu->arch.hflags & HF_SMM_MASK; 151 } 152 153 #endif 154