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Diffstat (limited to 'include/asm-x86/kvm_x86_emulate.h')
-rw-r--r-- | include/asm-x86/kvm_x86_emulate.h | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/include/asm-x86/kvm_x86_emulate.h b/include/asm-x86/kvm_x86_emulate.h deleted file mode 100644 index e2d9b030c1ac..000000000000 --- a/include/asm-x86/kvm_x86_emulate.h +++ /dev/null | |||
@@ -1,184 +0,0 @@ | |||
1 | /****************************************************************************** | ||
2 | * x86_emulate.h | ||
3 | * | ||
4 | * Generic x86 (32-bit and 64-bit) instruction decoder and emulator. | ||
5 | * | ||
6 | * Copyright (c) 2005 Keir Fraser | ||
7 | * | ||
8 | * From: xen-unstable 10676:af9809f51f81a3c43f276f00c81a52ef558afda4 | ||
9 | */ | ||
10 | |||
11 | #ifndef ASM_X86__KVM_X86_EMULATE_H | ||
12 | #define ASM_X86__KVM_X86_EMULATE_H | ||
13 | |||
14 | struct x86_emulate_ctxt; | ||
15 | |||
16 | /* | ||
17 | * x86_emulate_ops: | ||
18 | * | ||
19 | * These operations represent the instruction emulator's interface to memory. | ||
20 | * There are two categories of operation: those that act on ordinary memory | ||
21 | * regions (*_std), and those that act on memory regions known to require | ||
22 | * special treatment or emulation (*_emulated). | ||
23 | * | ||
24 | * The emulator assumes that an instruction accesses only one 'emulated memory' | ||
25 | * location, that this location is the given linear faulting address (cr2), and | ||
26 | * that this is one of the instruction's data operands. Instruction fetches and | ||
27 | * stack operations are assumed never to access emulated memory. The emulator | ||
28 | * automatically deduces which operand of a string-move operation is accessing | ||
29 | * emulated memory, and assumes that the other operand accesses normal memory. | ||
30 | * | ||
31 | * NOTES: | ||
32 | * 1. The emulator isn't very smart about emulated vs. standard memory. | ||
33 | * 'Emulated memory' access addresses should be checked for sanity. | ||
34 | * 'Normal memory' accesses may fault, and the caller must arrange to | ||
35 | * detect and handle reentrancy into the emulator via recursive faults. | ||
36 | * Accesses may be unaligned and may cross page boundaries. | ||
37 | * 2. If the access fails (cannot emulate, or a standard access faults) then | ||
38 | * it is up to the memop to propagate the fault to the guest VM via | ||
39 | * some out-of-band mechanism, unknown to the emulator. The memop signals | ||
40 | * failure by returning X86EMUL_PROPAGATE_FAULT to the emulator, which will | ||
41 | * then immediately bail. | ||
42 | * 3. Valid access sizes are 1, 2, 4 and 8 bytes. On x86/32 systems only | ||
43 | * cmpxchg8b_emulated need support 8-byte accesses. | ||
44 | * 4. The emulator cannot handle 64-bit mode emulation on an x86/32 system. | ||
45 | */ | ||
46 | /* Access completed successfully: continue emulation as normal. */ | ||
47 | #define X86EMUL_CONTINUE 0 | ||
48 | /* Access is unhandleable: bail from emulation and return error to caller. */ | ||
49 | #define X86EMUL_UNHANDLEABLE 1 | ||
50 | /* Terminate emulation but return success to the caller. */ | ||
51 | #define X86EMUL_PROPAGATE_FAULT 2 /* propagate a generated fault to guest */ | ||
52 | #define X86EMUL_RETRY_INSTR 2 /* retry the instruction for some reason */ | ||
53 | #define X86EMUL_CMPXCHG_FAILED 2 /* cmpxchg did not see expected value */ | ||
54 | struct x86_emulate_ops { | ||
55 | /* | ||
56 | * read_std: Read bytes of standard (non-emulated/special) memory. | ||
57 | * Used for instruction fetch, stack operations, and others. | ||
58 | * @addr: [IN ] Linear address from which to read. | ||
59 | * @val: [OUT] Value read from memory, zero-extended to 'u_long'. | ||
60 | * @bytes: [IN ] Number of bytes to read from memory. | ||
61 | */ | ||
62 | int (*read_std)(unsigned long addr, void *val, | ||
63 | unsigned int bytes, struct kvm_vcpu *vcpu); | ||
64 | |||
65 | /* | ||
66 | * read_emulated: Read bytes from emulated/special memory area. | ||
67 | * @addr: [IN ] Linear address from which to read. | ||
68 | * @val: [OUT] Value read from memory, zero-extended to 'u_long'. | ||
69 | * @bytes: [IN ] Number of bytes to read from memory. | ||
70 | */ | ||
71 | int (*read_emulated)(unsigned long addr, | ||
72 | void *val, | ||
73 | unsigned int bytes, | ||
74 | struct kvm_vcpu *vcpu); | ||
75 | |||
76 | /* | ||
77 | * write_emulated: Read bytes from emulated/special memory area. | ||
78 | * @addr: [IN ] Linear address to which to write. | ||
79 | * @val: [IN ] Value to write to memory (low-order bytes used as | ||
80 | * required). | ||
81 | * @bytes: [IN ] Number of bytes to write to memory. | ||
82 | */ | ||
83 | int (*write_emulated)(unsigned long addr, | ||
84 | const void *val, | ||
85 | unsigned int bytes, | ||
86 | struct kvm_vcpu *vcpu); | ||
87 | |||
88 | /* | ||
89 | * cmpxchg_emulated: Emulate an atomic (LOCKed) CMPXCHG operation on an | ||
90 | * emulated/special memory area. | ||
91 | * @addr: [IN ] Linear address to access. | ||
92 | * @old: [IN ] Value expected to be current at @addr. | ||
93 | * @new: [IN ] Value to write to @addr. | ||
94 | * @bytes: [IN ] Number of bytes to access using CMPXCHG. | ||
95 | */ | ||
96 | int (*cmpxchg_emulated)(unsigned long addr, | ||
97 | const void *old, | ||
98 | const void *new, | ||
99 | unsigned int bytes, | ||
100 | struct kvm_vcpu *vcpu); | ||
101 | |||
102 | }; | ||
103 | |||
104 | /* Type, address-of, and value of an instruction's operand. */ | ||
105 | struct operand { | ||
106 | enum { OP_REG, OP_MEM, OP_IMM, OP_NONE } type; | ||
107 | unsigned int bytes; | ||
108 | unsigned long val, orig_val, *ptr; | ||
109 | }; | ||
110 | |||
111 | struct fetch_cache { | ||
112 | u8 data[15]; | ||
113 | unsigned long start; | ||
114 | unsigned long end; | ||
115 | }; | ||
116 | |||
117 | struct decode_cache { | ||
118 | u8 twobyte; | ||
119 | u8 b; | ||
120 | u8 lock_prefix; | ||
121 | u8 rep_prefix; | ||
122 | u8 op_bytes; | ||
123 | u8 ad_bytes; | ||
124 | u8 rex_prefix; | ||
125 | struct operand src; | ||
126 | struct operand dst; | ||
127 | bool has_seg_override; | ||
128 | u8 seg_override; | ||
129 | unsigned int d; | ||
130 | unsigned long regs[NR_VCPU_REGS]; | ||
131 | unsigned long eip; | ||
132 | /* modrm */ | ||
133 | u8 modrm; | ||
134 | u8 modrm_mod; | ||
135 | u8 modrm_reg; | ||
136 | u8 modrm_rm; | ||
137 | u8 use_modrm_ea; | ||
138 | bool rip_relative; | ||
139 | unsigned long modrm_ea; | ||
140 | void *modrm_ptr; | ||
141 | unsigned long modrm_val; | ||
142 | struct fetch_cache fetch; | ||
143 | }; | ||
144 | |||
145 | struct x86_emulate_ctxt { | ||
146 | /* Register state before/after emulation. */ | ||
147 | struct kvm_vcpu *vcpu; | ||
148 | |||
149 | /* Linear faulting address (if emulating a page-faulting instruction) */ | ||
150 | unsigned long eflags; | ||
151 | |||
152 | /* Emulated execution mode, represented by an X86EMUL_MODE value. */ | ||
153 | int mode; | ||
154 | |||
155 | u32 cs_base; | ||
156 | |||
157 | /* decode cache */ | ||
158 | |||
159 | struct decode_cache decode; | ||
160 | }; | ||
161 | |||
162 | /* Repeat String Operation Prefix */ | ||
163 | #define REPE_PREFIX 1 | ||
164 | #define REPNE_PREFIX 2 | ||
165 | |||
166 | /* Execution mode, passed to the emulator. */ | ||
167 | #define X86EMUL_MODE_REAL 0 /* Real mode. */ | ||
168 | #define X86EMUL_MODE_PROT16 2 /* 16-bit protected mode. */ | ||
169 | #define X86EMUL_MODE_PROT32 4 /* 32-bit protected mode. */ | ||
170 | #define X86EMUL_MODE_PROT64 8 /* 64-bit (long) mode. */ | ||
171 | |||
172 | /* Host execution mode. */ | ||
173 | #if defined(__i386__) | ||
174 | #define X86EMUL_MODE_HOST X86EMUL_MODE_PROT32 | ||
175 | #elif defined(CONFIG_X86_64) | ||
176 | #define X86EMUL_MODE_HOST X86EMUL_MODE_PROT64 | ||
177 | #endif | ||
178 | |||
179 | int x86_decode_insn(struct x86_emulate_ctxt *ctxt, | ||
180 | struct x86_emulate_ops *ops); | ||
181 | int x86_emulate_insn(struct x86_emulate_ctxt *ctxt, | ||
182 | struct x86_emulate_ops *ops); | ||
183 | |||
184 | #endif /* ASM_X86__KVM_X86_EMULATE_H */ | ||