This source file includes following definitions.
- BUILD_KVM_GPR_ACCESSORS
- kvm_register_write
- kvm_rip_read
- kvm_rip_write
- kvm_rsp_read
- kvm_rsp_write
- kvm_pdptr_read
- kvm_read_cr0_bits
- kvm_read_cr0
- kvm_read_cr4_bits
- kvm_read_cr3
- kvm_read_cr4
- kvm_read_edx_eax
- enter_guest_mode
- leave_guest_mode
- is_guest_mode
- is_smm
1
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();
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