Re: [Xen-users] Is it possible to have two serial consoles?

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Thu, 2015-11-12 at 10:47 -0800, Sarah Newman wrote:
> On 11/12/2015 05:17 AM, Austin S Hemmelgarn wrote:
> > On 2015-11-12 06:24, Ian Campbell wrote:
> > > On Thu, 2015-11-12 at 11:17 +0000, Andy Smith wrote:
> > > > There is only com1 in Xen from what I can see,
> > > 
> > > There is a com2 as well, so you should be able to do com2=stuff just
> > > like
> > > with com1.
> > > 
> > > I've no idea what console=com1,com2 will do though I'm afraid, but
> > > it'd be
> > > interesting to try for sure.
> > > 
> > > I also think it odd that dom0 doesn't see ttyS1 when Xen isn't using
> > > it,
> > > I'd have thought only the one Xen was actually using would be
> > > invisible,
> > > but maybe ttyS0 being missing causes it to never look for ttyS1 or
> > > something.
> > I was always under the impression that IPMI based stuff (including
> > serial consoles) required the OS to have IPMI drivers (I may of course
> > be
> > completely wrong about this though), IPMI is detected at a low level,
> > so dom0 may not be seeing that anything related to it is even there to
> > set up.
> 
> It's a BIOS setting.

It can be either, I think, depending on the platform. BIOS or dedicated BMC
processor does seem to be the more common manifestation though.

Ian.



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