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KVM: inject #UD in 64bit mode from instruction that are not valid there

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Some instruction are obsolete in a long mode. Inject #UD.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Gleb Natapov 2010-02-11 14:43:14 +02:00 committed by Avi Kivity
parent 89a27f4d0e
commit 1161624f15
1 changed files with 5 additions and 5 deletions
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10
arch/x86/kvm/emulate.c
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@ -1015,11 +1015,6 @@ done_prefixes:
}
}
if (mode == X86EMUL_MODE_PROT64 && (c->d & No64)) {
kvm_report_emulation_failure(ctxt->vcpu, "invalid x86/64 instruction");
return -1;
}
if (c->d & Group) {
group = c->d & GroupMask;
c->modrm = insn_fetch(u8, 1, c->eip);
@ -1828,6 +1823,11 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
memcpy(c->regs, ctxt->vcpu->arch.regs, sizeof c->regs);
saved_eip = c->eip;
if (ctxt->mode == X86EMUL_MODE_PROT64 && (c->d & No64)) {
kvm_queue_exception(ctxt->vcpu, UD_VECTOR);
goto done;
}
/* LOCK prefix is allowed only with some instructions */
if (c->lock_prefix && !(c->d & Lock)) {
kvm_queue_exception(ctxt->vcpu, UD_VECTOR);