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KVM: x86 emulator: implement LTR

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Opcode 0F 00 /3.  Encountered during Windows XP secondary processor bringup.

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2012-06-13 16:33:29 +03:00
parent 869be99c75
commit 8089000616
1 changed files with 10 additions and 1 deletions
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11
arch/x86/kvm/emulate.c
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@ -3033,6 +3033,15 @@ static int em_lldt(struct x86_emulate_ctxt *ctxt)
return load_segment_descriptor(ctxt, sel, VCPU_SREG_LDTR);
}
static int em_ltr(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_TR);
}
static int em_invlpg(struct x86_emulate_ctxt *ctxt)
{
int rc;
@ -3579,7 +3588,7 @@ static struct opcode group6[] = {
DI(Prot, sldt),
DI(Prot, str),
II(Prot | Priv | SrcMem16, em_lldt, lldt),
DI(Prot | Priv, ltr),
II(Prot | Priv | SrcMem16, em_ltr, ltr),
N, N, N, N,
};