[Fedora-xen] DomU console driver not works for Fedora17 in HVM mode with Xen 4.1.2

[Wei Xu]

Thanks for your reply.

I have tried the method but it looks still can't work, there is no "hvc0"
device file in my "/dev" directory,
is that the root cause?


On Mon, Aug 20, 2012 at 11:47 PM, Stefano Stabellini <
stefano.stabellini at eu.citrix.com> wrote:

> On Mon, 20 Aug 2012, Konrad Rzeszutek Wilk wrote:
> > On Mon, Aug 20, 2012 at 09:39:56PM +0800, Wei Xu wrote:
> > > > Hi All,
> > > > I'm try to set up and verify Xen console driver base on Fedora 17
> and Xen
> > > > 4.1.2 with hvm guest mode,
> > > > i searched around and got a link, it give steps both for PV and HVM
> mode,
> > > > I followed the HVM guide
> > > > and upgraded my kernel to 3.5.0.
> > > >
> > > >            http://www.dedoimedo.com/computers/xen-console.html
> > > >
> > > > After that, I can got console output with "xm console <dom_id>", but
> the
> > > > console driver is not used when I tracing the driver
> >
> > .. I am not sure I understand: "when I tracing the driver" ? Are
> > you referring to the PV driver?
> >
> > > > with "crash" utility, by examing the "console_drivers", the console
> driver
> > > > is still "serial8250 console", so i wonder if I didn't
> > > > set up it properly or something else, is there someone ever
> experienced
> > > > it, thanks.
> >
> > Hm, it should be the hvc one. Perhaps Stefano knows..
> >
> > CC-ing him and xen-devel here.
>
> An HVM guest has access to both an emulated serial (if a serial="pty"
> parameter is present in the VM config file) and a PV console.
> However the default first console is the emulated serial with libxl (see
> libxl__primary_console_find), that is what you get when you execute "xl
> console" without -t.
>
> But if you edit inittab to spawn a getty on hvc0 and then execute "xl
> console -t pv" you should get access to the PV console.
>
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