Re: Can VMX provide real mode support?

[GaoYi <gaoyi709@gmail.com>]

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So if the VT already supports unrestricted guest, KVM can then runs such
guest?

在 2012年3月25日 下午5:55，Avi Kivity <avi@redhat.com>写道：

>  On 03/23/2012 07:58 PM, Luiz Capitulino wrote:
> > On Wed, 21 Mar 2012 15:48:43 +0200
> > Avi Kivity <avi@redhat.com> wrote:
> >
> > > On 03/21/2012 03:40 PM, Jan Kiszka wrote:
> > > > On 2012-03-21 13:38, GaoYi wrote:
> > > > > Hi Jan,
> > > > >
> > > > >     Since the newest Intel-VT supports the guest OS under the real
> mode, which was already supported in AMD-V, can the VMX in the latest KVM
> support that case?
> > > >
> > > > Yes, both with our without that "unrestricted guest" support (as
> Intel
> > > > called it), real mode will generally work. Without that CPU feature,
> I
> > > > think to recall that there were some limitations for big real mode,
> not
> > > > sure.
> > > >
> > >
> > > Yes, big real mode will not work without "unrestricted guest".  There
> > > was some work to emulate it (module option
> emulate_invalid_guest_state),
> > > but it is not complete.
> >
> > Can you provide a pointer for this? series?
>
> It's merged (look for emulate_invalid_guest_state in vmx.c), just
> incomplete.
>
> --
> error compiling committee.c: too many arguments to function
>
>

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