RE: [PATCH v5 1/4] domctl: introduce a new domain create flag, XEN_DOMCTL_CDF_evtchn_fifo, ...

["Durrant, Paul" <pdurrant@xxxxxxxxxxxx>]

> -----Original Message-----
> From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> Sent: 04 December 2020 17:45
> To: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> Cc: Julien Grall <julien@xxxxxxx>; Jan Beulich <jbeulich@xxxxxxxx>; 
> paul@xxxxxxx; Durrant, Paul
> <pdurrant@xxxxxxxxxxxx>; Elnikety, Eslam <elnikety@xxxxxxxxxx>; 'Ian Jackson' 
> <iwj@xxxxxxxxxxxxxx>;
> 'Wei Liu' <wl@xxxxxxx>; 'Anthony PERARD' <anthony.perard@xxxxxxxxxx>; 'George 
> Dunlap'
> <george.dunlap@xxxxxxxxxx>; 'Christian Lindig' <christian.lindig@xxxxxxxxxx>; 
> 'David Scott'
> <dave@xxxxxxxxxx>; 'Volodymyr Babchuk' <Volodymyr_Babchuk@xxxxxxxx>; 'Roger 
> Pau Monné'
> <roger.pau@xxxxxxxxxx>; xen-devel@xxxxxxxxxxxxxxxxxxxx
> Subject: RE: [EXTERNAL] [PATCH v5 1/4] domctl: introduce a new domain create 
> flag,
> XEN_DOMCTL_CDF_evtchn_fifo, ...
> 
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> 
> On 04/12/2020 17:41, Stefano Stabellini wrote:
> >>> FAOD, I am sure there might be other features that need to be
> >>> disabled. But we have to start somewhere :).
> >> Absolutely top of the list, importance wise, is so we can test different
> >> configurations, without needing to rebuild the hypervisor (and to a
> >> lesser extent, without having to reboot).
> >>
> >> It is a mistake that events/grants/etc were ever available unilaterally
> >> in HVM guests.  This is definitely a step in the right direction (but I
> >> thought it would be too rude to ask Paul to make all of those CDF flags
> >> at once).
> > +1
> >
> > For FuSa we'll need to be able to disable them at some point soon.
> 
> FWIW, I have a proper plan for this stuff, which start alongside the
> fixed toolstack ABI, and will cover all aspects of optional
> functionality in a domain.
> 

OK. Can we live with this series as it stands until that point? There is some 
urgency to get at least these two things fixed.

  Paul

> ~Andrew