From d4b4325fdb66739a74148f90da360ff82ce707d4 Mon Sep 17 00:00:00 2001
From: Avi Kivity <avi@redhat.com>
Date: Tue, 13 Sep 2011 10:45:50 +0300
Subject: [PATCH] KVM: x86 emulator: switch lds/les/lss/lfs/lgs to direct
 decode

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
 arch/x86/kvm/emulate.c | 22 +++++++---------------
 1 file changed, 7 insertions(+), 15 deletions(-)

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index ab48611b79cf..bd3e488c734e 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -1828,8 +1828,9 @@ static int em_ret_far(struct x86_emulate_ctxt *ctxt)
 	return rc;
 }
 
-static int emulate_load_segment(struct x86_emulate_ctxt *ctxt, int seg)
+static int em_lseg(struct x86_emulate_ctxt *ctxt)
 {
+	int seg = ctxt->src2.val;
 	unsigned short sel;
 	int rc;
 
@@ -3193,8 +3194,8 @@ static struct opcode opcode_table[256] = {
 	D2bv(DstMem | SrcImmByte | ModRM),
 	I(ImplicitOps | Stack | SrcImmU16, em_ret_near_imm),
 	I(ImplicitOps | Stack, em_ret),
-	D(DstReg | SrcMemFAddr | ModRM | No64 | Src2ES),
-	D(DstReg | SrcMemFAddr | ModRM | No64 | Src2DS),
+	I(DstReg | SrcMemFAddr | ModRM | No64 | Src2ES, em_lseg),
+	I(DstReg | SrcMemFAddr | ModRM | No64 | Src2DS, em_lseg),
 	G(ByteOp, group11), G(0, group11),
 	/* 0xC8 - 0xCF */
 	N, N, N, I(ImplicitOps | Stack, em_ret_far),
@@ -3281,10 +3282,10 @@ static struct opcode twobyte_table[256] = {
 	D(ModRM), I(DstReg | SrcMem | ModRM, em_imul),
 	/* 0xB0 - 0xB7 */
 	D2bv(DstMem | SrcReg | ModRM | Lock),
-	D(DstReg | SrcMemFAddr | ModRM | Src2SS),
+	I(DstReg | SrcMemFAddr | ModRM | Src2SS, em_lseg),
 	D(DstMem | SrcReg | ModRM | BitOp | Lock),
-	D(DstReg | SrcMemFAddr | ModRM | Src2FS),
-	D(DstReg | SrcMemFAddr | ModRM | Src2GS),
+	I(DstReg | SrcMemFAddr | ModRM | Src2FS, em_lseg),
+	I(DstReg | SrcMemFAddr | ModRM | Src2GS, em_lseg),
 	D(ByteOp | DstReg | SrcMem | ModRM | Mov), D(DstReg | SrcMem16 | ModRM | Mov),
 	/* 0xB8 - 0xBF */
 	N, N,
@@ -3893,10 +3894,6 @@ special_insn:
 	case 0xc0 ... 0xc1:
 		rc = em_grp2(ctxt);
 		break;
-	case 0xc4:		/* les */
-	case 0xc5:		/* lds */
-		rc = emulate_load_segment(ctxt, ctxt->src2.val);
-		break;
 	case 0xcc:		/* int3 */
 		rc = emulate_int(ctxt, 3);
 		break;
@@ -4146,11 +4143,6 @@ twobyte_insn:
 			ctxt->dst.addr.reg = (unsigned long *)&ctxt->regs[VCPU_REGS_RAX];
 		}
 		break;
-	case 0xb2:		/* lss */
-	case 0xb4:		/* lfs */
-	case 0xb5:		/* lgs */
-		rc = emulate_load_segment(ctxt, ctxt->src2.val);
-		break;
 	case 0xb3:
 	      btr:		/* btr */
 		emulate_2op_SrcV_nobyte(ctxt, "btr");