Re: [Qemu-devel] [PATCH V4 4/4] fw_cfg: insert fw_cfg file blobs via qemu cmdline

["Michael S. Tsirkin" <mst@redhat.com>]

On Mon, Jun 01, 2015 at 12:50:50PM +0200, Paolo Bonzini wrote:
> 
> 
> On 01/06/2015 12:48, Michael S. Tsirkin wrote:
> > On Mon, Jun 01, 2015 at 12:43:35PM +0200, Paolo Bonzini wrote:
> >>
> >>
> >> On 01/06/2015 12:23, Michael S. Tsirkin wrote:
> >>> Still, reserving part of the namespace for QEMU internal use
> >>> is *not* policy, it's just good engineering.
> >>>
> >>> How about we forbid adding files under "etc/" ?
> >>>
> >>> That would be enough to avoid conflicts.
> >>
> >> I do not understand.  What we're doing is free-beer.  We can always say
> >> no.  What's your worry?
> > 
> > Someone writes a tool using a specific path.
> > We then add same path upstream, script breaks.
> 
> Who cares.  We documented it.
> 
> >> One usecase of this feature is to avoid recompiling QEMU while playing
> >> with firmware.  If you cannot mimic QEMU's behavior (which is to add
> >> "etc/" files), the feature is pointless, or at least I totally cannot
> >> understand its purpose and I'm against merging it.
> > 
> > Confused.  Why does it produce the warning then?
> 
> Because someone else asked for it.  I cannot answer. :)
> 
> > If it's just for playing games, add a configure
> > switch to enable it, and disable by default.
> > Don't set traps for users.
> 
> What is for playing games?  What is the feature useful for, except for
> developers.
> 
> Paolo


OK so if it's a dveloper feature, I think a config flag
to hide it from users is a good idea?