Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 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 | |
H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 11 | #ifndef _ASM_X86_KVM_X86_EMULATE_H |
| 12 | #define _ASM_X86_KVM_X86_EMULATE_H |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 13 | |
Gleb Natapov | 38ba30b | 2010-03-18 15:20:17 +0200 | [diff] [blame] | 14 | #include <asm/desc_defs.h> |
| 15 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 16 | struct x86_emulate_ctxt; |
Avi Kivity | c4f035c | 2011-04-04 12:39:22 +0200 | [diff] [blame] | 17 | enum x86_intercept; |
| 18 | enum x86_intercept_stage; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 19 | |
Avi Kivity | da9cb57 | 2010-11-22 17:53:21 +0200 | [diff] [blame] | 20 | struct x86_exception { |
| 21 | u8 vector; |
| 22 | bool error_code_valid; |
| 23 | u16 error_code; |
Avi Kivity | 6389ee9 | 2010-11-29 16:12:30 +0200 | [diff] [blame] | 24 | bool nested_page_fault; |
| 25 | u64 address; /* cr2 or nested page fault gpa */ |
Avi Kivity | da9cb57 | 2010-11-22 17:53:21 +0200 | [diff] [blame] | 26 | }; |
| 27 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 28 | /* |
Joerg Roedel | 8a76d7f | 2011-04-04 12:39:27 +0200 | [diff] [blame] | 29 | * This struct is used to carry enough information from the instruction |
| 30 | * decoder to main KVM so that a decision can be made whether the |
| 31 | * instruction needs to be intercepted or not. |
| 32 | */ |
| 33 | struct x86_instruction_info { |
| 34 | u8 intercept; /* which intercept */ |
| 35 | u8 rep_prefix; /* rep prefix? */ |
| 36 | u8 modrm_mod; /* mod part of modrm */ |
| 37 | u8 modrm_reg; /* index of register used */ |
| 38 | u8 modrm_rm; /* rm part of modrm */ |
| 39 | u64 src_val; /* value of source operand */ |
| 40 | u8 src_bytes; /* size of source operand */ |
| 41 | u8 dst_bytes; /* size of destination operand */ |
| 42 | u8 ad_bytes; /* size of src/dst address */ |
| 43 | u64 next_rip; /* rip following the instruction */ |
| 44 | }; |
| 45 | |
| 46 | /* |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 47 | * x86_emulate_ops: |
| 48 | * |
| 49 | * These operations represent the instruction emulator's interface to memory. |
| 50 | * There are two categories of operation: those that act on ordinary memory |
| 51 | * regions (*_std), and those that act on memory regions known to require |
| 52 | * special treatment or emulation (*_emulated). |
| 53 | * |
| 54 | * The emulator assumes that an instruction accesses only one 'emulated memory' |
| 55 | * location, that this location is the given linear faulting address (cr2), and |
| 56 | * that this is one of the instruction's data operands. Instruction fetches and |
| 57 | * stack operations are assumed never to access emulated memory. The emulator |
| 58 | * automatically deduces which operand of a string-move operation is accessing |
| 59 | * emulated memory, and assumes that the other operand accesses normal memory. |
| 60 | * |
| 61 | * NOTES: |
| 62 | * 1. The emulator isn't very smart about emulated vs. standard memory. |
| 63 | * 'Emulated memory' access addresses should be checked for sanity. |
| 64 | * 'Normal memory' accesses may fault, and the caller must arrange to |
| 65 | * detect and handle reentrancy into the emulator via recursive faults. |
| 66 | * Accesses may be unaligned and may cross page boundaries. |
| 67 | * 2. If the access fails (cannot emulate, or a standard access faults) then |
| 68 | * it is up to the memop to propagate the fault to the guest VM via |
| 69 | * some out-of-band mechanism, unknown to the emulator. The memop signals |
| 70 | * failure by returning X86EMUL_PROPAGATE_FAULT to the emulator, which will |
| 71 | * then immediately bail. |
| 72 | * 3. Valid access sizes are 1, 2, 4 and 8 bytes. On x86/32 systems only |
| 73 | * cmpxchg8b_emulated need support 8-byte accesses. |
| 74 | * 4. The emulator cannot handle 64-bit mode emulation on an x86/32 system. |
| 75 | */ |
| 76 | /* Access completed successfully: continue emulation as normal. */ |
| 77 | #define X86EMUL_CONTINUE 0 |
| 78 | /* Access is unhandleable: bail from emulation and return error to caller. */ |
| 79 | #define X86EMUL_UNHANDLEABLE 1 |
| 80 | /* Terminate emulation but return success to the caller. */ |
| 81 | #define X86EMUL_PROPAGATE_FAULT 2 /* propagate a generated fault to guest */ |
Gleb Natapov | e680080 | 2010-04-28 19:15:33 +0300 | [diff] [blame] | 82 | #define X86EMUL_RETRY_INSTR 3 /* retry the instruction for some reason */ |
| 83 | #define X86EMUL_CMPXCHG_FAILED 4 /* cmpxchg did not see expected value */ |
Gleb Natapov | c3cd7ff | 2010-04-28 19:15:35 +0300 | [diff] [blame] | 84 | #define X86EMUL_IO_NEEDED 5 /* IO is needed to complete emulation */ |
Avi Kivity | c4f035c | 2011-04-04 12:39:22 +0200 | [diff] [blame] | 85 | #define X86EMUL_INTERCEPTED 6 /* Intercepted by nested VMCB/VMCS */ |
Gleb Natapov | e680080 | 2010-04-28 19:15:33 +0300 | [diff] [blame] | 86 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 87 | struct x86_emulate_ops { |
| 88 | /* |
| 89 | * read_std: Read bytes of standard (non-emulated/special) memory. |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 90 | * Used for descriptor reading. |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 91 | * @addr: [IN ] Linear address from which to read. |
| 92 | * @val: [OUT] Value read from memory, zero-extended to 'u_long'. |
| 93 | * @bytes: [IN ] Number of bytes to read from memory. |
| 94 | */ |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 95 | int (*read_std)(struct x86_emulate_ctxt *ctxt, |
| 96 | unsigned long addr, void *val, |
| 97 | unsigned int bytes, |
Avi Kivity | bcc55cb | 2010-11-22 17:53:22 +0200 | [diff] [blame] | 98 | struct x86_exception *fault); |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 99 | |
| 100 | /* |
Gleb Natapov | 2dafc6c | 2010-03-18 15:20:16 +0200 | [diff] [blame] | 101 | * write_std: Write bytes of standard (non-emulated/special) memory. |
| 102 | * Used for descriptor writing. |
| 103 | * @addr: [IN ] Linear address to which to write. |
| 104 | * @val: [OUT] Value write to memory, zero-extended to 'u_long'. |
| 105 | * @bytes: [IN ] Number of bytes to write to memory. |
| 106 | */ |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 107 | int (*write_std)(struct x86_emulate_ctxt *ctxt, |
| 108 | unsigned long addr, void *val, unsigned int bytes, |
Avi Kivity | bcc55cb | 2010-11-22 17:53:22 +0200 | [diff] [blame] | 109 | struct x86_exception *fault); |
Gleb Natapov | 2dafc6c | 2010-03-18 15:20:16 +0200 | [diff] [blame] | 110 | /* |
Gleb Natapov | 1871c60 | 2010-02-10 14:21:32 +0200 | [diff] [blame] | 111 | * fetch: Read bytes of standard (non-emulated/special) memory. |
| 112 | * Used for instruction fetch. |
| 113 | * @addr: [IN ] Linear address from which to read. |
| 114 | * @val: [OUT] Value read from memory, zero-extended to 'u_long'. |
| 115 | * @bytes: [IN ] Number of bytes to read from memory. |
| 116 | */ |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 117 | int (*fetch)(struct x86_emulate_ctxt *ctxt, |
| 118 | unsigned long addr, void *val, unsigned int bytes, |
Avi Kivity | bcc55cb | 2010-11-22 17:53:22 +0200 | [diff] [blame] | 119 | struct x86_exception *fault); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 120 | |
| 121 | /* |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 122 | * read_emulated: Read bytes from emulated/special memory area. |
| 123 | * @addr: [IN ] Linear address from which to read. |
| 124 | * @val: [OUT] Value read from memory, zero-extended to 'u_long'. |
| 125 | * @bytes: [IN ] Number of bytes to read from memory. |
| 126 | */ |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 127 | int (*read_emulated)(struct x86_emulate_ctxt *ctxt, |
| 128 | unsigned long addr, void *val, unsigned int bytes, |
| 129 | struct x86_exception *fault); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 130 | |
| 131 | /* |
Takuya Yoshikawa | 0d17897 | 2010-01-06 17:55:23 +0900 | [diff] [blame] | 132 | * write_emulated: Write bytes to emulated/special memory area. |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 133 | * @addr: [IN ] Linear address to which to write. |
| 134 | * @val: [IN ] Value to write to memory (low-order bytes used as |
| 135 | * required). |
| 136 | * @bytes: [IN ] Number of bytes to write to memory. |
| 137 | */ |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 138 | int (*write_emulated)(struct x86_emulate_ctxt *ctxt, |
| 139 | unsigned long addr, const void *val, |
Joe Perches | 0c7825e | 2008-03-23 01:02:35 -0700 | [diff] [blame] | 140 | unsigned int bytes, |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 141 | struct x86_exception *fault); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 142 | |
| 143 | /* |
| 144 | * cmpxchg_emulated: Emulate an atomic (LOCKed) CMPXCHG operation on an |
| 145 | * emulated/special memory area. |
| 146 | * @addr: [IN ] Linear address to access. |
| 147 | * @old: [IN ] Value expected to be current at @addr. |
| 148 | * @new: [IN ] Value to write to @addr. |
| 149 | * @bytes: [IN ] Number of bytes to access using CMPXCHG. |
| 150 | */ |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 151 | int (*cmpxchg_emulated)(struct x86_emulate_ctxt *ctxt, |
| 152 | unsigned long addr, |
Joe Perches | 0c7825e | 2008-03-23 01:02:35 -0700 | [diff] [blame] | 153 | const void *old, |
| 154 | const void *new, |
| 155 | unsigned int bytes, |
Avi Kivity | 0f65dd7 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 156 | struct x86_exception *fault); |
Avi Kivity | 3cb16fe | 2011-04-20 15:38:44 +0300 | [diff] [blame] | 157 | void (*invlpg)(struct x86_emulate_ctxt *ctxt, ulong addr); |
Gleb Natapov | cf8f70b | 2010-03-18 15:20:23 +0200 | [diff] [blame] | 158 | |
Avi Kivity | ca1d4a9 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 159 | int (*pio_in_emulated)(struct x86_emulate_ctxt *ctxt, |
| 160 | int size, unsigned short port, void *val, |
| 161 | unsigned int count); |
Gleb Natapov | cf8f70b | 2010-03-18 15:20:23 +0200 | [diff] [blame] | 162 | |
Avi Kivity | ca1d4a9 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 163 | int (*pio_out_emulated)(struct x86_emulate_ctxt *ctxt, |
| 164 | int size, unsigned short port, const void *val, |
| 165 | unsigned int count); |
Gleb Natapov | cf8f70b | 2010-03-18 15:20:23 +0200 | [diff] [blame] | 166 | |
Avi Kivity | 1aa3661 | 2011-04-27 13:20:30 +0300 | [diff] [blame] | 167 | bool (*get_segment)(struct x86_emulate_ctxt *ctxt, u16 *selector, |
| 168 | struct desc_struct *desc, u32 *base3, int seg); |
| 169 | void (*set_segment)(struct x86_emulate_ctxt *ctxt, u16 selector, |
| 170 | struct desc_struct *desc, u32 base3, int seg); |
Avi Kivity | 4bff1e86 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 171 | unsigned long (*get_cached_segment_base)(struct x86_emulate_ctxt *ctxt, |
| 172 | int seg); |
| 173 | void (*get_gdt)(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt); |
| 174 | void (*get_idt)(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt); |
Avi Kivity | 1ac9d0c | 2011-04-20 15:12:00 +0300 | [diff] [blame] | 175 | void (*set_gdt)(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt); |
| 176 | void (*set_idt)(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt); |
Avi Kivity | 717746e | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 177 | ulong (*get_cr)(struct x86_emulate_ctxt *ctxt, int cr); |
| 178 | int (*set_cr)(struct x86_emulate_ctxt *ctxt, int cr, ulong val); |
| 179 | int (*cpl)(struct x86_emulate_ctxt *ctxt); |
| 180 | int (*get_dr)(struct x86_emulate_ctxt *ctxt, int dr, ulong *dest); |
| 181 | int (*set_dr)(struct x86_emulate_ctxt *ctxt, int dr, ulong value); |
| 182 | int (*set_msr)(struct x86_emulate_ctxt *ctxt, u32 msr_index, u64 data); |
| 183 | int (*get_msr)(struct x86_emulate_ctxt *ctxt, u32 msr_index, u64 *pdata); |
Avi Kivity | 6c3287f | 2011-04-20 15:43:05 +0300 | [diff] [blame] | 184 | void (*halt)(struct x86_emulate_ctxt *ctxt); |
Avi Kivity | bcaf5cc | 2011-04-20 15:53:23 +0300 | [diff] [blame] | 185 | void (*wbinvd)(struct x86_emulate_ctxt *ctxt); |
Avi Kivity | d6aa100 | 2011-04-20 15:47:13 +0300 | [diff] [blame] | 186 | int (*fix_hypercall)(struct x86_emulate_ctxt *ctxt); |
Avi Kivity | 5037f6f | 2011-03-28 16:53:59 +0200 | [diff] [blame] | 187 | void (*get_fpu)(struct x86_emulate_ctxt *ctxt); /* disables preempt */ |
| 188 | void (*put_fpu)(struct x86_emulate_ctxt *ctxt); /* reenables preempt */ |
Avi Kivity | 2953538 | 2011-04-20 13:37:53 +0300 | [diff] [blame] | 189 | int (*intercept)(struct x86_emulate_ctxt *ctxt, |
Joerg Roedel | 8a76d7f | 2011-04-04 12:39:27 +0200 | [diff] [blame] | 190 | struct x86_instruction_info *info, |
Avi Kivity | c4f035c | 2011-04-04 12:39:22 +0200 | [diff] [blame] | 191 | enum x86_intercept_stage stage); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 192 | }; |
| 193 | |
Avi Kivity | 1253791 | 2011-03-29 11:41:27 +0200 | [diff] [blame] | 194 | typedef u32 __attribute__((vector_size(16))) sse128_t; |
| 195 | |
Laurent Vivier | e4e03de | 2007-09-18 11:52:50 +0200 | [diff] [blame] | 196 | /* Type, address-of, and value of an instruction's operand. */ |
| 197 | struct operand { |
Avi Kivity | 1253791 | 2011-03-29 11:41:27 +0200 | [diff] [blame] | 198 | enum { OP_REG, OP_MEM, OP_IMM, OP_XMM, OP_NONE } type; |
Laurent Vivier | e4e03de | 2007-09-18 11:52:50 +0200 | [diff] [blame] | 199 | unsigned int bytes; |
Avi Kivity | 16518d5 | 2010-08-26 14:31:30 +0300 | [diff] [blame] | 200 | union { |
| 201 | unsigned long orig_val; |
| 202 | u64 orig_val64; |
| 203 | }; |
Avi Kivity | 1a6440aef | 2010-08-01 12:35:10 +0300 | [diff] [blame] | 204 | union { |
| 205 | unsigned long *reg; |
Avi Kivity | 90de84f | 2010-11-17 15:28:21 +0200 | [diff] [blame] | 206 | struct segmented_address { |
| 207 | ulong ea; |
| 208 | unsigned seg; |
| 209 | } mem; |
Avi Kivity | 1253791 | 2011-03-29 11:41:27 +0200 | [diff] [blame] | 210 | unsigned xmm; |
Avi Kivity | 1a6440aef | 2010-08-01 12:35:10 +0300 | [diff] [blame] | 211 | } addr; |
Gleb Natapov | 414e627 | 2010-04-28 19:15:26 +0300 | [diff] [blame] | 212 | union { |
| 213 | unsigned long val; |
Avi Kivity | 16518d5 | 2010-08-26 14:31:30 +0300 | [diff] [blame] | 214 | u64 val64; |
Gleb Natapov | 414e627 | 2010-04-28 19:15:26 +0300 | [diff] [blame] | 215 | char valptr[sizeof(unsigned long) + 2]; |
Avi Kivity | 1253791 | 2011-03-29 11:41:27 +0200 | [diff] [blame] | 216 | sse128_t vec_val; |
Gleb Natapov | 414e627 | 2010-04-28 19:15:26 +0300 | [diff] [blame] | 217 | }; |
Laurent Vivier | e4e03de | 2007-09-18 11:52:50 +0200 | [diff] [blame] | 218 | }; |
| 219 | |
Avi Kivity | 6226686 | 2007-11-20 13:15:52 +0200 | [diff] [blame] | 220 | struct fetch_cache { |
| 221 | u8 data[15]; |
| 222 | unsigned long start; |
| 223 | unsigned long end; |
| 224 | }; |
| 225 | |
Gleb Natapov | 7b262e9 | 2010-03-18 15:20:27 +0200 | [diff] [blame] | 226 | struct read_cache { |
| 227 | u8 data[1024]; |
| 228 | unsigned long pos; |
| 229 | unsigned long end; |
| 230 | }; |
| 231 | |
Laurent Vivier | e4e03de | 2007-09-18 11:52:50 +0200 | [diff] [blame] | 232 | struct decode_cache { |
| 233 | u8 twobyte; |
| 234 | u8 b; |
Avi Kivity | c4f035c | 2011-04-04 12:39:22 +0200 | [diff] [blame] | 235 | u8 intercept; |
Laurent Vivier | e4e03de | 2007-09-18 11:52:50 +0200 | [diff] [blame] | 236 | u8 lock_prefix; |
| 237 | u8 rep_prefix; |
| 238 | u8 op_bytes; |
| 239 | u8 ad_bytes; |
Avi Kivity | 33615aa | 2007-10-31 11:15:56 +0200 | [diff] [blame] | 240 | u8 rex_prefix; |
Laurent Vivier | e4e03de | 2007-09-18 11:52:50 +0200 | [diff] [blame] | 241 | struct operand src; |
Guillaume Thouvenin | 0dc8d10 | 2008-12-04 14:26:42 +0100 | [diff] [blame] | 242 | struct operand src2; |
Laurent Vivier | e4e03de | 2007-09-18 11:52:50 +0200 | [diff] [blame] | 243 | struct operand dst; |
Avi Kivity | 7a5b56d | 2008-06-22 16:22:51 +0300 | [diff] [blame] | 244 | bool has_seg_override; |
| 245 | u8 seg_override; |
Laurent Vivier | e4e03de | 2007-09-18 11:52:50 +0200 | [diff] [blame] | 246 | unsigned int d; |
Avi Kivity | ef65c88 | 2010-07-29 15:11:51 +0300 | [diff] [blame] | 247 | int (*execute)(struct x86_emulate_ctxt *ctxt); |
Joerg Roedel | d09beab | 2011-04-04 12:39:25 +0200 | [diff] [blame] | 248 | int (*check_perm)(struct x86_emulate_ctxt *ctxt); |
Laurent Vivier | e4e03de | 2007-09-18 11:52:50 +0200 | [diff] [blame] | 249 | unsigned long regs[NR_VCPU_REGS]; |
Gleb Natapov | 063db06 | 2010-03-18 15:20:06 +0200 | [diff] [blame] | 250 | unsigned long eip; |
Laurent Vivier | e4e03de | 2007-09-18 11:52:50 +0200 | [diff] [blame] | 251 | /* modrm */ |
| 252 | u8 modrm; |
| 253 | u8 modrm_mod; |
| 254 | u8 modrm_reg; |
| 255 | u8 modrm_rm; |
Avi Kivity | 09ee57c | 2010-08-01 12:07:29 +0300 | [diff] [blame] | 256 | u8 modrm_seg; |
Avi Kivity | f5b4edc | 2008-06-15 22:09:11 -0700 | [diff] [blame] | 257 | bool rip_relative; |
Avi Kivity | 6226686 | 2007-11-20 13:15:52 +0200 | [diff] [blame] | 258 | struct fetch_cache fetch; |
Gleb Natapov | 7b262e9 | 2010-03-18 15:20:27 +0200 | [diff] [blame] | 259 | struct read_cache io_read; |
Gleb Natapov | 9de4157 | 2010-04-28 19:15:22 +0300 | [diff] [blame] | 260 | struct read_cache mem_read; |
Laurent Vivier | e4e03de | 2007-09-18 11:52:50 +0200 | [diff] [blame] | 261 | }; |
| 262 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 263 | struct x86_emulate_ctxt { |
Avi Kivity | 9aabc88f | 2010-07-29 15:11:50 +0300 | [diff] [blame] | 264 | struct x86_emulate_ops *ops; |
| 265 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 266 | /* Register state before/after emulation. */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 267 | unsigned long eflags; |
Gleb Natapov | 063db06 | 2010-03-18 15:20:06 +0200 | [diff] [blame] | 268 | unsigned long eip; /* eip before instruction emulation */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 269 | /* Emulated execution mode, represented by an X86EMUL_MODE value. */ |
| 270 | int mode; |
Laurent Vivier | e4e03de | 2007-09-18 11:52:50 +0200 | [diff] [blame] | 271 | |
Glauber Costa | 310b5d3 | 2009-05-12 16:21:06 -0400 | [diff] [blame] | 272 | /* interruptibility state, as a result of execution of STI or MOV SS */ |
| 273 | int interruptibility; |
| 274 | |
Avi Kivity | c4f035c | 2011-04-04 12:39:22 +0200 | [diff] [blame] | 275 | bool guest_mode; /* guest running a nested guest */ |
Gleb Natapov | 4fc40f0 | 2010-08-02 12:47:51 +0300 | [diff] [blame] | 276 | bool perm_ok; /* do not check permissions if true */ |
Avi Kivity | d867162 | 2011-02-01 16:32:03 +0200 | [diff] [blame] | 277 | bool only_vendor_specific_insn; |
Gleb Natapov | 54b8486 | 2010-04-28 19:15:44 +0300 | [diff] [blame] | 278 | |
Avi Kivity | da9cb57 | 2010-11-22 17:53:21 +0200 | [diff] [blame] | 279 | bool have_exception; |
| 280 | struct x86_exception exception; |
Gleb Natapov | 54b8486 | 2010-04-28 19:15:44 +0300 | [diff] [blame] | 281 | |
Laurent Vivier | e4e03de | 2007-09-18 11:52:50 +0200 | [diff] [blame] | 282 | /* decode cache */ |
Laurent Vivier | e4e03de | 2007-09-18 11:52:50 +0200 | [diff] [blame] | 283 | struct decode_cache decode; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 284 | }; |
| 285 | |
Guillaume Thouvenin | 90e0a28 | 2007-11-22 11:32:09 +0100 | [diff] [blame] | 286 | /* Repeat String Operation Prefix */ |
Avi Kivity | 1d6b114 | 2010-01-20 16:00:35 +0200 | [diff] [blame] | 287 | #define REPE_PREFIX 0xf3 |
| 288 | #define REPNE_PREFIX 0xf2 |
Guillaume Thouvenin | 90e0a28 | 2007-11-22 11:32:09 +0100 | [diff] [blame] | 289 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 290 | /* Execution mode, passed to the emulator. */ |
| 291 | #define X86EMUL_MODE_REAL 0 /* Real mode. */ |
Gleb Natapov | a004475 | 2010-02-10 14:21:31 +0200 | [diff] [blame] | 292 | #define X86EMUL_MODE_VM86 1 /* Virtual 8086 mode. */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 293 | #define X86EMUL_MODE_PROT16 2 /* 16-bit protected mode. */ |
| 294 | #define X86EMUL_MODE_PROT32 4 /* 32-bit protected mode. */ |
| 295 | #define X86EMUL_MODE_PROT64 8 /* 64-bit (long) mode. */ |
| 296 | |
Joerg Roedel | 8ea7d6a | 2011-04-04 12:39:26 +0200 | [diff] [blame] | 297 | /* any protected mode */ |
| 298 | #define X86EMUL_MODE_PROT (X86EMUL_MODE_PROT16|X86EMUL_MODE_PROT32| \ |
| 299 | X86EMUL_MODE_PROT64) |
| 300 | |
Avi Kivity | c4f035c | 2011-04-04 12:39:22 +0200 | [diff] [blame] | 301 | enum x86_intercept_stage { |
Avi Kivity | 40e19b5 | 2011-04-21 12:35:41 +0300 | [diff] [blame] | 302 | X86_ICTP_NONE = 0, /* Allow zero-init to not match anything */ |
Avi Kivity | c4f035c | 2011-04-04 12:39:22 +0200 | [diff] [blame] | 303 | X86_ICPT_PRE_EXCEPT, |
| 304 | X86_ICPT_POST_EXCEPT, |
| 305 | X86_ICPT_POST_MEMACCESS, |
| 306 | }; |
| 307 | |
| 308 | enum x86_intercept { |
| 309 | x86_intercept_none, |
Joerg Roedel | cfec82c | 2011-04-04 12:39:28 +0200 | [diff] [blame] | 310 | x86_intercept_cr_read, |
| 311 | x86_intercept_cr_write, |
| 312 | x86_intercept_clts, |
Avi Kivity | 3c6e276 | 2011-04-04 12:39:23 +0200 | [diff] [blame] | 313 | x86_intercept_lmsw, |
| 314 | x86_intercept_smsw, |
Joerg Roedel | 3b88e41 | 2011-04-04 12:39:29 +0200 | [diff] [blame] | 315 | x86_intercept_dr_read, |
| 316 | x86_intercept_dr_write, |
Avi Kivity | 3c6e276 | 2011-04-04 12:39:23 +0200 | [diff] [blame] | 317 | x86_intercept_lidt, |
| 318 | x86_intercept_sidt, |
| 319 | x86_intercept_lgdt, |
| 320 | x86_intercept_sgdt, |
| 321 | x86_intercept_lldt, |
| 322 | x86_intercept_sldt, |
| 323 | x86_intercept_ltr, |
| 324 | x86_intercept_str, |
| 325 | x86_intercept_rdtsc, |
| 326 | x86_intercept_rdpmc, |
| 327 | x86_intercept_pushf, |
| 328 | x86_intercept_popf, |
| 329 | x86_intercept_cpuid, |
| 330 | x86_intercept_rsm, |
| 331 | x86_intercept_iret, |
| 332 | x86_intercept_intn, |
| 333 | x86_intercept_invd, |
| 334 | x86_intercept_pause, |
| 335 | x86_intercept_hlt, |
| 336 | x86_intercept_invlpg, |
| 337 | x86_intercept_invlpga, |
| 338 | x86_intercept_vmrun, |
| 339 | x86_intercept_vmload, |
| 340 | x86_intercept_vmsave, |
| 341 | x86_intercept_vmmcall, |
| 342 | x86_intercept_stgi, |
| 343 | x86_intercept_clgi, |
| 344 | x86_intercept_skinit, |
| 345 | x86_intercept_rdtscp, |
| 346 | x86_intercept_icebp, |
| 347 | x86_intercept_wbinvd, |
| 348 | x86_intercept_monitor, |
| 349 | x86_intercept_mwait, |
Joerg Roedel | 8061252 | 2011-04-04 12:39:33 +0200 | [diff] [blame] | 350 | x86_intercept_rdmsr, |
| 351 | x86_intercept_wrmsr, |
Joerg Roedel | f651193 | 2011-04-04 12:39:35 +0200 | [diff] [blame] | 352 | x86_intercept_in, |
| 353 | x86_intercept_ins, |
| 354 | x86_intercept_out, |
| 355 | x86_intercept_outs, |
Avi Kivity | c4f035c | 2011-04-04 12:39:22 +0200 | [diff] [blame] | 356 | |
| 357 | nr_x86_intercepts |
| 358 | }; |
| 359 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 360 | /* Host execution mode. */ |
Sheng Yang | d73fa29 | 2008-10-14 15:59:10 +0800 | [diff] [blame] | 361 | #if defined(CONFIG_X86_32) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 362 | #define X86EMUL_MODE_HOST X86EMUL_MODE_PROT32 |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 363 | #elif defined(CONFIG_X86_64) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 364 | #define X86EMUL_MODE_HOST X86EMUL_MODE_PROT64 |
| 365 | #endif |
| 366 | |
Andre Przywara | dc25e89 | 2010-12-21 11:12:07 +0100 | [diff] [blame] | 367 | int x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len); |
Gleb Natapov | d2ddd1c | 2010-08-25 12:47:43 +0300 | [diff] [blame] | 368 | #define EMULATION_FAILED -1 |
| 369 | #define EMULATION_OK 0 |
| 370 | #define EMULATION_RESTART 1 |
Joerg Roedel | 775fde8 | 2011-04-04 12:39:24 +0200 | [diff] [blame] | 371 | #define EMULATION_INTERCEPTED 2 |
Avi Kivity | 9aabc88f | 2010-07-29 15:11:50 +0300 | [diff] [blame] | 372 | int x86_emulate_insn(struct x86_emulate_ctxt *ctxt); |
Gleb Natapov | 38ba30b | 2010-03-18 15:20:17 +0200 | [diff] [blame] | 373 | int emulator_task_switch(struct x86_emulate_ctxt *ctxt, |
Jan Kiszka | e269fb2 | 2010-04-14 15:51:09 +0200 | [diff] [blame] | 374 | u16 tss_selector, int reason, |
| 375 | bool has_error_code, u32 error_code); |
Mohammed Gamal | 4ab8e02 | 2010-09-19 14:34:05 +0200 | [diff] [blame] | 376 | int emulate_int_real(struct x86_emulate_ctxt *ctxt, |
| 377 | struct x86_emulate_ops *ops, int irq); |
H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 378 | #endif /* _ASM_X86_KVM_X86_EMULATE_H */ |