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authorAvi Kivity <avi@redhat.com>2010-08-03 14:46:56 +0300
committerAvi Kivity <avi@redhat.com>2010-10-24 10:51:52 +0200
commitb9eac5f4d146dc6cb88c8e6d891f8abe60493338 (patch)
treee2f55f6c1a47c3d51076e325006970784c7a036f
parente90aa41e6ca76cd7be021d4d5560e64954cd4585 (diff)
KVM: x86 emulator: use single stage decoding for mov instructions
Signed-off-by: Avi Kivity <avi@redhat.com>
-rw-r--r--arch/x86/kvm/emulate.c42
1 files changed, 18 insertions, 24 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 8bfa3e3aa71..c0715ae05a5 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2378,6 +2378,13 @@ static int em_rdtsc(struct x86_emulate_ctxt *ctxt)
return X86EMUL_CONTINUE;
}
+static int em_mov(struct x86_emulate_ctxt *ctxt)
+{
+ struct decode_cache *c = &ctxt->decode;
+ c->dst.val = c->src.val;
+ return X86EMUL_CONTINUE;
+}
+
#define D(_y) { .flags = (_y) }
#define N D(0)
#define G(_f, _g) { .flags = ((_f) | Group), .u.group = (_g) }
@@ -2489,8 +2496,8 @@ static struct opcode opcode_table[256] = {
G(DstMem | SrcImmByte | ModRM | Group, group1),
D2bv(DstMem | SrcReg | ModRM), D2bv(DstMem | SrcReg | ModRM | Lock),
/* 0x88 - 0x8F */
- D2bv(DstMem | SrcReg | ModRM | Mov),
- D2bv(DstReg | SrcMem | ModRM | Mov),
+ I2bv(DstMem | SrcReg | ModRM | Mov, em_mov),
+ I2bv(DstReg | SrcMem | ModRM | Mov, em_mov),
D(DstMem | SrcNone | ModRM | Mov), D(ModRM | SrcMem | NoAccess | DstReg),
D(ImplicitOps | SrcMem16 | ModRM), G(0, group1A),
/* 0x90 - 0x97 */
@@ -2500,24 +2507,25 @@ static struct opcode opcode_table[256] = {
I(SrcImmFAddr | No64, em_call_far), N,
D(ImplicitOps | Stack), D(ImplicitOps | Stack), N, N,
/* 0xA0 - 0xA7 */
- D2bv(DstAcc | SrcMem | Mov | MemAbs),
- D2bv(DstMem | SrcAcc | Mov | MemAbs),
- D2bv(SrcSI | DstDI | Mov | String), D2bv(SrcSI | DstDI | String),
+ I2bv(DstAcc | SrcMem | Mov | MemAbs, em_mov),
+ I2bv(DstMem | SrcAcc | Mov | MemAbs, em_mov),
+ I2bv(SrcSI | DstDI | Mov | String, em_mov),
+ D2bv(SrcSI | DstDI | String),
/* 0xA8 - 0xAF */
D2bv(DstAcc | SrcImm),
- D2bv(SrcAcc | DstDI | Mov | String),
- D2bv(SrcSI | DstAcc | Mov | String),
+ I2bv(SrcAcc | DstDI | Mov | String, em_mov),
+ I2bv(SrcSI | DstAcc | Mov | String, em_mov),
D2bv(SrcAcc | DstDI | String),
/* 0xB0 - 0xB7 */
- X8(D(ByteOp | DstReg | SrcImm | Mov)),
+ X8(I(ByteOp | DstReg | SrcImm | Mov, em_mov)),
/* 0xB8 - 0xBF */
- X8(D(DstReg | SrcImm | Mov)),
+ X8(I(DstReg | SrcImm | Mov, em_mov)),
/* 0xC0 - 0xC7 */
D2bv(DstMem | SrcImmByte | ModRM),
I(ImplicitOps | Stack | SrcImmU16, em_ret_near_imm),
D(ImplicitOps | Stack),
D(DstReg | SrcMemFAddr | ModRM | No64), D(DstReg | SrcMemFAddr | ModRM | No64),
- D2bv(DstMem | SrcImm | ModRM | Mov),
+ I2bv(DstMem | SrcImm | ModRM | Mov, em_mov),
/* 0xC8 - 0xCF */
N, N, N, D(ImplicitOps | Stack),
D(ImplicitOps), D(SrcImmByte), D(ImplicitOps | No64), D(ImplicitOps),
@@ -3212,8 +3220,6 @@ special_insn:
c->dst.val = c->src.orig_val;
c->lock_prefix = 1;
break;
- case 0x88 ... 0x8b: /* mov */
- goto mov;
case 0x8c: /* mov r/m, sreg */
if (c->modrm_reg > VCPU_SREG_GS) {
emulate_ud(ctxt);
@@ -3271,22 +3277,14 @@ special_insn:
if (rc != X86EMUL_CONTINUE)
goto done;
break;
- case 0xa0 ... 0xa3: /* mov */
- case 0xa4 ... 0xa5: /* movs */
- goto mov;
case 0xa6 ... 0xa7: /* cmps */
c->dst.type = OP_NONE; /* Disable writeback. */
DPRINTF("cmps: mem1=0x%p mem2=0x%p\n", c->src.addr.mem, c->dst.addr.mem);
goto cmp;
case 0xa8 ... 0xa9: /* test ax, imm */
goto test;
- case 0xaa ... 0xab: /* stos */
- case 0xac ... 0xad: /* lods */
- goto mov;
case 0xae ... 0xaf: /* scas */
goto cmp;
- case 0xb0 ... 0xbf: /* mov r, imm */
- goto mov;
case 0xc0 ... 0xc1:
emulate_grp2(ctxt);
break;
@@ -3305,10 +3303,6 @@ special_insn:
if (rc != X86EMUL_CONTINUE)
goto done;
break;
- case 0xc6 ... 0xc7: /* mov (sole member of Grp11) */
- mov:
- c->dst.val = c->src.val;
- break;
case 0xcb: /* ret far */
rc = emulate_ret_far(ctxt, ops);
if (rc != X86EMUL_CONTINUE)