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Commit 80890006 authored by Avi Kivity's avatar Avi Kivity
Browse files

KVM: x86 emulator: implement LTR 



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

Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 869be99c

arch/x86/kvm/emulate.c

+10 −1
Original line number Diff line number Diff line
@@ -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,

};