Re: [Xen-devel] [RFC PATCH v2 16/17] libxl: access QMP socket via console for qemu-in-stubdomain

[Ian Jackson <ian.jackson@xxxxxxxxxx>]

Marek Marczykowski-Górecki writes ("[RFC PATCH v2 16/17] libxl: access QMP 
socket via console for qemu-in-stubdomain"):
> Add support for talking with qemu in stubdomain via QMP connected to a
> console. Since a console doesn't have out of band connect/disconnect
> signaling, use (new) qmp_reset command at every connect, to force
> renegotiation.

I'm afraid that this is no good because it's dealing with the old
synchronous qmp code - code which Anthony (CC'd) is restructuring.

Since libxl must not trust the qmp connection to a linux stub dm, any
more than to a dom0 depriv qemu dm, I think Anthony's work is a
prerequisite for Linux stubdomain support (upstream, at least).

So this patch is currently blocked and will need to be reworked in due
course.  I'm hoping it will get a lot simpler if we can sort out
(i) async qmp along the lines of Anthony's series (ii) pv console stuff.

Ian.

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