diff options
| -rw-r--r-- | arch/x86/kvm/emulate.c | 32 |
1 files changed, 7 insertions, 25 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 2fe731c82299..20a7a167df1d 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -82,7 +82,6 @@ #define Stack (1<<13) /* Stack instruction (push/pop) */ #define Group (1<<14) /* Bits 3:5 of modrm byte extend opcode */ #define GroupDual (1<<15) /* Alternate decoding of mod == 3 */ -#define GroupMask 0x0f /* Group number stored in bits 0:3 */ /* Misc flags */ #define Undefined (1<<25) /* No Such Instruction */ #define Lock (1<<26) /* lock prefix is allowed for the instruction */ @@ -104,10 +103,6 @@ #define X8(x) X4(x), X4(x) #define X16(x) X8(x), X8(x) -enum { - NoGrp, -}; - struct opcode { u32 flags; union { @@ -174,12 +169,6 @@ static struct group_dual group9 = { { N, N, N, N, N, N, N, N, } }; -static struct opcode group_table[] = { -}; - -static struct opcode group2_table[] = { -}; - static struct opcode opcode_table[256] = { /* 0x00 - 0x07 */ D(ByteOp | DstMem | SrcReg | ModRM | Lock), D(DstMem | SrcReg | ModRM | Lock), @@ -959,7 +948,7 @@ x86_decode_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) struct decode_cache *c = &ctxt->decode; int rc = X86EMUL_CONTINUE; int mode = ctxt->mode; - int def_op_bytes, def_ad_bytes, group, dual, goffset; + int def_op_bytes, def_ad_bytes, dual, goffset; struct opcode opcode, *g_mod012, *g_mod3; /* we cannot decode insn before we complete previous rep insn */ @@ -1059,24 +1048,17 @@ done_prefixes: c->d = opcode.flags; if (c->d & Group) { - group = c->d & GroupMask; dual = c->d & GroupDual; c->modrm = insn_fetch(u8, 1, c->eip); --c->eip; - if (group) { - g_mod012 = g_mod3 = &group_table[group * 8]; - if (c->d & GroupDual) - g_mod3 = &group2_table[group * 8]; - } else { - if (c->d & GroupDual) { - g_mod012 = opcode.u.gdual->mod012; - g_mod3 = opcode.u.gdual->mod3; - } else - g_mod012 = g_mod3 = opcode.u.group; - } + if (c->d & GroupDual) { + g_mod012 = opcode.u.gdual->mod012; + g_mod3 = opcode.u.gdual->mod3; + } else + g_mod012 = g_mod3 = opcode.u.group; - c->d &= ~(Group | GroupDual | GroupMask); + c->d &= ~(Group | GroupDual); goffset = (c->modrm >> 3) & 7; |
