Re: [PATCH v2 16/24] hw/xen: handle soft reset for primary console

[David Woodhouse <dwmw2@xxxxxxxxxxxxx>]

On Tue, 2023-10-24 at 16:44 +0100, Paul Durrant wrote:
> On 19/10/2023 16:40, David Woodhouse wrote:
> > From: David Woodhouse <dwmw@xxxxxxxxxxxx>
> > 
> > On soft reset, the prinary console event channel needs to be rebound to
> > the backend port (in the xen-console driver). We could put that into the
> > xen-console driver itself, but it's slightly less ugly to keep it within
> > the KVM/Xen code, by stashing the backend port# on event channel reset
> > and then rebinding in the primary console reset when it has to recreate
> > the guest port anyway.
> 
> Does Xen re-bind the primary console on EVTCHNOP_reset? That's news to 
> me. I go check.

I spent an unhapp hour trying to work out how Xen actually does any of
this :)

In the short term I'm more interested in having soft reset work, than
an explicit EVTCHNOP_reset. And I can't work out *how*, but we do seem
to have console again after a kexec in real Xen.

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