From: Luiz Capitulino <lcapitulino@redhat.com>
To: Avi Kivity <avi@redhat.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>, GaoYi <gaoyi709@gmail.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
kvm <kvm@vger.kernel.org>
Subject: Re: [Qemu-devel] Can VMX provide real mode support?
Date: Fri, 23 Mar 2012 14:58:17 -0300 [thread overview]
Message-ID: <20120323145817.11e8101c@doriath.home> (raw)
In-Reply-To: <4F69DC3B.3050509@redhat.com>
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?
next prev parent reply other threads:[~2012-03-23 17:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-21 12:38 [Qemu-devel] Can VMX provide real mode support? GaoYi
2012-03-21 13:40 ` Jan Kiszka
2012-03-21 13:48 ` Avi Kivity
2012-03-21 13:56 ` GaoYi
2012-03-23 17:58 ` Luiz Capitulino [this message]
2012-03-25 9:55 ` Avi Kivity
2012-03-25 11:42 ` GaoYi
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