On Tue, Jul 13, 2010 at 04:54:01PM +0300, Avi Kivity wrote:
> On 07/13/2010 04:40 PM, Gleb Natapov wrote:
> >Mark inc (0xfe/0 0xff/0) and dec (0xfe/1 0xff/1) as lock prefix capable.
> >
> >Signed-off-by: Gleb Natapov<gleb@xxxxxxxxxx>
> >diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
> >index 255473f..b38bd8b 100644
> >--- a/arch/x86/kvm/emulate.c
> >+++ b/arch/x86/kvm/emulate.c
> >@@ -345,10 +345,10 @@ static u32 group_table[] = {
> > DstMem | SrcNone | ModRM, DstMem | SrcNone | ModRM,
> > 0, 0, 0, 0,
> > [Group4*8] =
> >- ByteOp | DstMem | SrcNone | ModRM, ByteOp | DstMem | SrcNone | ModRM,
> >+ ByteOp | DstMem | SrcNone | ModRM | Lock, ByteOp | DstMem | SrcNone | ModRM | Lock,
> > 0, 0, 0, 0, 0, 0,
> > [Group5*8] =
> >- DstMem | SrcNone | ModRM, DstMem | SrcNone | ModRM,
> >+ DstMem | SrcNone | ModRM | Lock, DstMem | SrcNone | ModRM | Lock,
> > SrcMem | ModRM | Stack, 0,
> > SrcMem | ModRM | Stack, SrcMemFAddr | ModRM | ImplicitOps,
> > SrcMem | ModRM | Stack, 0,
>
> Right. Please post a regression test as well (kvm/test/x86/emulator.c).
>
OK.
> Did this occur on a real workload?
>
Yes, RHEL6 guest on RHEL6 host without ept.
--
Gleb.
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