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KVM: x86: smsw emulation is incorrect in 64-bit mode 

In 64-bit mode, when the destination is a register, the assignment is done
according to the operand size. Otherwise (memory operand or no 64-bit mode), a
16-bit assignment is performed.

Currently, 16-bit assignment is always done to the destination.

Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Nadav Amit 2014-06-02 18:34:11 +03:00 committed by Paolo Bonzini
parent aaa05f2437
commit 32e94d0696
1 changed files with 2 additions and 1 deletions
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3
arch/x86/kvm/emulate.c
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@ -3235,7 +3235,8 @@ static int em_lidt(struct x86_emulate_ctxt *ctxt)
static int em_smsw(struct x86_emulate_ctxt *ctxt)
{
ctxt->dst.bytes = 2;
if (ctxt->dst.type == OP_MEM)
ctxt->dst.bytes = 2;
ctxt->dst.val = ctxt->ops->get_cr(ctxt, 0);
return X86EMUL_CONTINUE;
}