Re: [Xen-devel] [libvirt] [PATCH LIBVIRT] libxl: Recognise ARM architectures

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Fri, 28 Feb 2014, Daniel P. Berrange wrote:
> On Fri, Feb 28, 2014 at 02:12:30AM +0000, Ian Campbell wrote:
> > On Wed, 2014-02-26 at 15:01 +0000, Daniel P. Berrange wrote:
> > > Yep, if ARM has a PV console, then we'd need to add  tiny bit to the XML
> > > to allow us to configure that explicitly, similar to how we do for KVM's
> > > virtio-console support.
> > 
> > Do you mean I need to add something to the XML config snippet, or I need
> > to add some special handling in the XML parser/consumer?
> > 
> > I've grepped around the virtio-console stuff and I'm none the wiser.
> 
> Opps, yes, I should have explained this better, since our docs here are
> about as clear as mud.
> 
> With traditional x86 paravirt Xen, we just have the plain paravirt console
> devices
> 
>     <console type='pty'>
>       <target type='xen'/>
>     </console>
> 
> With x86  fullvirt Xen/KVM/QEMU, the console type just defaults to being
> a serial port so you would usually just add
> 
>     <serial type='pty'>
>     </serial>
> 
> and then libvirt would automatically add a <console> with
> 
>     <console type='pty'>
>       <target type='serial'/>
>     </console>
> 
> 
> With x86 fullvirt KVM, we also have support for virtio which is
> done using
> 
>     <console type='pty'>
>       <target type='virtio'/>
>     </console>
> 
> 
> So actually this leads me to ask what kind of console Arm fullvirt Xen
> guests actually have ? If they just use the traditional Xen paravirt
> console, then we just need to make sure that this works for them by
> default:
> 
>     <console type='pty'>
>       <target type='xen'/>
>     </console>
> 
> 
> If there's a different type of console device that's not related to
> the Xen paravirt console device, then we'd need to invent a new
> <target type='xxx'/> value for Arm.

It is just the traditional Xen paravirt console.

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