1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef ASM_KVM_CACHE_REGS_H
3 #define ASM_KVM_CACHE_REGS_H
5 #include <linux/kvm_host.h>
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 | X86_CR4_TSD)
12 #define BUILD_KVM_GPR_ACCESSORS(lname, uname) \
13 static __always_inline unsigned long kvm_##lname##_read(struct kvm_vcpu *vcpu)\
15 return vcpu->arch.regs[VCPU_REGS_##uname]; \
17 static __always_inline void kvm_##lname##_write(struct kvm_vcpu *vcpu, \
20 vcpu->arch.regs[VCPU_REGS_##uname] = val; \
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)
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)
40 static inline unsigned long kvm_register_read(struct kvm_vcpu *vcpu,
43 if (!test_bit(reg, (unsigned long *)&vcpu->arch.regs_avail))
44 kvm_x86_ops->cache_reg(vcpu, reg);
46 return vcpu->arch.regs[reg];
49 static inline void kvm_register_write(struct kvm_vcpu *vcpu,
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);
58 static inline unsigned long kvm_rip_read(struct kvm_vcpu *vcpu)
60 return kvm_register_read(vcpu, VCPU_REGS_RIP);
63 static inline void kvm_rip_write(struct kvm_vcpu *vcpu, unsigned long val)
65 kvm_register_write(vcpu, VCPU_REGS_RIP, val);
68 static inline unsigned long kvm_rsp_read(struct kvm_vcpu *vcpu)
70 return kvm_register_read(vcpu, VCPU_REGS_RSP);
73 static inline void kvm_rsp_write(struct kvm_vcpu *vcpu, unsigned long val)
75 kvm_register_write(vcpu, VCPU_REGS_RSP, val);
78 static inline u64 kvm_pdptr_read(struct kvm_vcpu *vcpu, int index)
80 might_sleep(); /* on svm */
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);
86 return vcpu->arch.walk_mmu->pdptrs[index];
89 static inline ulong kvm_read_cr0_bits(struct kvm_vcpu *vcpu, ulong mask)
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;
97 static inline ulong kvm_read_cr0(struct kvm_vcpu *vcpu)
99 return kvm_read_cr0_bits(vcpu, ~0UL);
102 static inline ulong kvm_read_cr4_bits(struct kvm_vcpu *vcpu, ulong mask)
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;
110 static inline ulong kvm_read_cr3(struct kvm_vcpu *vcpu)
112 if (!test_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail))
113 kvm_x86_ops->decache_cr3(vcpu);
114 return vcpu->arch.cr3;
117 static inline ulong kvm_read_cr4(struct kvm_vcpu *vcpu)
119 return kvm_read_cr4_bits(vcpu, ~0UL);
122 static inline u64 kvm_read_edx_eax(struct kvm_vcpu *vcpu)
124 return (kvm_rax_read(vcpu) & -1u)
125 | ((u64)(kvm_rdx_read(vcpu) & -1u) << 32);
128 static inline void enter_guest_mode(struct kvm_vcpu *vcpu)
130 vcpu->arch.hflags |= HF_GUEST_MASK;
133 static inline void leave_guest_mode(struct kvm_vcpu *vcpu)
135 vcpu->arch.hflags &= ~HF_GUEST_MASK;
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);
143 static inline bool is_guest_mode(struct kvm_vcpu *vcpu)
145 return vcpu->arch.hflags & HF_GUEST_MASK;
148 static inline bool is_smm(struct kvm_vcpu *vcpu)
150 return vcpu->arch.hflags & HF_SMM_MASK;