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Re: [Qemu-devel] Can VMX provide real mode support?
From: |
Luiz Capitulino |
Subject: |
Re: [Qemu-devel] Can VMX provide real mode support? |
Date: |
Fri, 23 Mar 2012 14:58:17 -0300 |
On Wed, 21 Mar 2012 15:48:43 +0200
Avi Kivity <address@hidden> 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?