Opcode 0F 00 /2. Used by isolinux durign the protected mode transition.
Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>
---
arch/x86/kvm/emulate.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 4eea1e4..85f7a5f 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -3006,6 +3006,15 @@ 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;
@@ -3551,7 +3560,7 @@ static int check_perm_out(struct x86_emulate_ctxt *ctxt)
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,
};
--
1.7.10.1
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