From: Amit Shah <amit.shah@redhat.com>
To: "Daniel P. Berrange" <berrange@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>,
Gerd Hoffmann <kraxel@redhat.com>,
qemu-devel@nongnu.org, kvm@vger.kernel.org,
virtualization@lists.linux-foundation.org
Subject: Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communication
Date: Thu, 20 Aug 2009 20:08:02 +0530 [thread overview]
Message-ID: <20090820143802.GA20265@amit-x200.redhat.com> (raw)
In-Reply-To: <20090820142509.GD27710@redhat.com>
On (Thu) Aug 20 2009 [15:25:09], Daniel P. Berrange wrote:
> On Thu, Aug 20, 2009 at 07:12:41PM +0530, Amit Shah wrote:
> >
> > I've now seen some more code here and to me it looks like virtioconsole
> > is not used on any of the guests that qemu supports. The virtio_console
> > kernel module only works with lguest and s390 currently. There is one
> > feature and some config values supported by the kernel module but not in
> > qemu.
> >
> > So it looks as if we have virtio-console merged but no one uses it. Is
> > this right?
>
> Nope. Grab a Fedora 11 live CD, and boot with
>
> # qemu-kvm -virtioconsole stdio -cdrom Fedora-11-i686-Live.iso -m 500
>
> Once it completes booting & logs into gnome, open a terminal and run
> as root
>
> agetty /dev/hvc0 9600 vt100
>
> You'll get a login prompt on the host machine now.
>
> What appears to not be working, is early kernel boot messages. eg, I
> ought to be able todo
Oh; ok. So the console device is exposed only in the userspace; it's not
used for the early boot messages and not registered early-on. That's
only done for lguest and s390.
> # qemu-kvm -virtioconsole stdio -kernel vmlinuz -initrd initrd.img \
> -append "console=hvc0" -m 500
>
> and see the kernel boot messages, but this doesn't work with Fedora
> kernels at least. Not tried upstream, or looked to see if this is just
> an oversight in the Kconfig use for Fedora kernels.
Thanks,
Amit
next prev parent reply other threads:[~2009-08-20 14:38 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-27 18:04 [Qemu-devel] virtio-serial: An interface for host-guest communication Amit Shah
2009-07-27 18:04 ` [Qemu-devel] [PATCH 1/1] virtio_serial: A char device for simple guest <-> host communication Amit Shah
2009-07-27 18:04 ` [Qemu-devel] [PATCH 1/3] virtio-serial: virtio device for simple host <-> guest communication Amit Shah
2009-07-27 18:04 ` [Qemu-devel] [PATCH 2/3] vnc: add a is_vnc_active() helper Amit Shah
2009-07-27 18:04 ` [Qemu-devel] [PATCH 3/3] virtio-serial: vnc: support for sending / receiving guest clipboard Amit Shah
2009-08-05 0:03 ` [Qemu-devel] Re: [PATCH 1/1] virtio_serial: A char device for simple guest <-> host communication Rusty Russell
2009-08-05 5:12 ` Amit Shah
2009-08-05 9:58 ` Amit Shah
2009-07-27 20:22 ` [Qemu-devel] Re: virtio-serial: An interface for host-guest communication Anthony Liguori
2009-07-27 20:32 ` Daniel P. Berrange
2009-07-27 20:37 ` Anthony Liguori
2009-07-27 20:46 ` Jamie Lokier
2009-07-27 23:44 ` Anthony Liguori
2009-07-28 10:36 ` Amit Shah
[not found] ` <4A6F0048.1000103@codemonkey.ws>
2009-07-29 7:44 ` Amit Shah
2009-07-29 7:48 ` Gleb Natapov
2009-08-05 18:00 ` Jamie Lokier
[not found] ` <20090728140029.GA16067@amd.home.annexia.org>
2009-07-28 14:48 ` Anthony Liguori
2009-07-28 14:55 ` Richard W.M. Jones
2009-07-28 15:00 ` Anthony Liguori
2009-08-03 19:57 ` Anthony Liguori
2009-08-05 17:57 ` Jamie Lokier
2009-08-05 18:00 ` Anthony Liguori
2009-08-06 10:38 ` Amit Shah
2009-08-06 13:29 ` Anthony Liguori
2009-08-06 13:41 ` Amit Shah
2009-08-06 13:58 ` Anthony Liguori
2009-08-06 14:04 ` Amit Shah
2009-08-06 17:37 ` Jamie Lokier
2009-08-07 6:38 ` Amit Shah
2009-08-07 14:14 ` Anthony Liguori
2009-08-10 6:55 ` Amit Shah
2009-08-10 9:47 ` Gerd Hoffmann
2009-08-10 13:02 ` Anthony Liguori
2009-08-10 14:02 ` Gerd Hoffmann
2009-08-10 14:20 ` Anthony Liguori
2009-08-10 15:34 ` Gerd Hoffmann
2009-08-10 16:59 ` Anthony Liguori
2009-08-10 17:27 ` Anthony Liguori
2009-08-12 18:27 ` Paul Brook
2009-08-14 8:15 ` Amit Shah
2009-08-14 13:29 ` Anthony Liguori
2009-08-14 13:41 ` Amit Shah
2009-08-20 13:42 ` Amit Shah
2009-08-20 14:25 ` Daniel P. Berrange
2009-08-20 14:38 ` Amit Shah [this message]
2009-08-20 14:42 ` Amit Shah
2009-08-14 13:49 ` Gerd Hoffmann
2009-08-14 16:25 ` Anthony Liguori
2009-08-20 7:31 ` Rusty Russell
2009-08-20 7:44 ` Gerd Hoffmann
2009-08-20 7:55 ` Amit Shah
2009-08-20 17:10 ` Jamie Lokier
2009-08-25 12:43 ` Rusty Russell
2009-08-25 13:00 ` Gerd Hoffmann
2009-08-10 14:20 ` Anthony Liguori
2009-08-10 23:09 ` Rusty Russell
2009-08-11 0:16 ` Anthony Liguori
2009-08-10 14:27 ` Anthony Liguori
2009-08-10 15:57 ` Gerd Hoffmann
2009-08-06 10:35 ` Amit Shah
2009-08-05 18:32 ` Richard W.M. Jones
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20090820143802.GA20265@amit-x200.redhat.com \
--to=amit.shah@redhat.com \
--cc=berrange@redhat.com \
--cc=kraxel@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=qemu-devel@nongnu.org \
--cc=rusty@rustcorp.com.au \
--cc=virtualization@lists.linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).