Re: [Qemu-devel] [PATCH v2] vl.c: disallow command line fw cfg without opt/

[Paolo Bonzini]

On 17/03/2016 09:49, Laszlo Ersek wrote:
> On 03/16/16 21:31, Michael S. Tsirkin wrote:
>> On Wed, Mar 16, 2016 at 07:35:09PM +0100, Laszlo Ersek wrote:
>>> OVMF uses this feature for a few flags. They are all called
>>> "opt/ovmf/...". I followed the advice in "docs/specs/fw_cfg.txt" (which
>>> shouldn't be surprising since I seem to have reviewed every patch for
>>> that file):
>>
>> Wait a second.  You are saying upsteam OVMF puts files there.
> 
> Sorry, I wasn't clear enough. OVMF consumes files that are put there by
> the user.

I think what Michael is saying is that OVMF now has to worry about users
calling their own files "opt/ovmf/foo" and causing a conflict.

I actually agree with his worry, but probably not with how to resolve
it.  For me, the way to resolve it would be:

1) files should actually be named etc/ovmf/foo.  OVMF could optionally
accept both the old and the new names for a while, you would decide
whether this is useful.

2) in turn, because of (1) even the warning on opt/ should be removed.

Paolo