diff options
| author | Nadav Amit <namit@cs.technion.ac.il> | 2014-06-02 18:34:11 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-06-18 17:46:19 +0200 |
| commit | 32e94d0696c26c6ba4f3ff53e70f6e0e825979bc (patch) | |
| tree | 906c7d91be5d9fa12b0991f3d2d5413d3f18348e | |
| parent | aaa05f2437b9450f30b301db962ec4d45ec90fbb (diff) | |
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>
| -rw-r--r-- | arch/x86/kvm/emulate.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index a151f8d24a1d..9b5d97db7631 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -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; } |