From a14e579f224ba929fe2f1d9bbbff688ae67e2ec4 Mon Sep 17 00:00:00 2001
From: Avi Kivity <avi@redhat.com>
Date: Wed, 13 Jun 2012 12:28:33 +0300
Subject: KVM: x86 emulator: emulate LLDT

Opcode 0F 00 /2. Used by isolinux durign the protected mode transition.

Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index cfa5cc3..7b575ad 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -3015,6 +3015,15 @@ static int em_mov_sreg_rm(struct x86_emulate_ctxt *ctxt)
 	return load_segment_descriptor(ctxt, sel, ctxt->modrm_reg);
 }
 
+static int em_lldt(struct x86_emulate_ctxt *ctxt)
+{
+	u16 sel = ctxt->src.val;
+
+	/* Disable writeback. */
+	ctxt->dst.type = OP_NONE;
+	return load_segment_descriptor(ctxt, sel, VCPU_SREG_LDTR);
+}
+
 static int em_invlpg(struct x86_emulate_ctxt *ctxt)
 {
 	int rc;
@@ -3560,7 +3569,7 @@ static struct opcode group5[] = {
 static struct opcode group6[] = {
 	DI(Prot,	sldt),
 	DI(Prot,	str),
-	DI(Prot | Priv,	lldt),
+	II(Prot | Priv | SrcMem16, em_lldt, lldt),
 	DI(Prot | Priv,	ltr),
 	N, N, N, N,
 };
-- 
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