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Re: [Qemu-devel] [PATCH v3] fw_cfg: RFQDN rules, documentation

From: Michael S. Tsirkin
Subject: Re: [Qemu-devel] [PATCH v3] fw_cfg: RFQDN rules, documentation
Date: Mon, 11 Apr 2016 14:31:21 +0300

On Mon, Apr 11, 2016 at 01:04:14PM +0200, Markus Armbruster wrote:
> My best guess
> is you're referring to the part where I challenge mapping
> /unsupported/root/FOO to FOO.  I find that baroque.  I can accept
> baroque when I see a reason.  That's why I asked for it.  "I got ACKs
> for it" is not a particular satisfying reason, but I figure you got
> another one.  Do tell :)

The issue I am trying to address is that users can put stuff
outside "opt/" without realizing they are violating any rules.
I do not think printing a warning is sufficient for this:
it is masked by tools too often.
Thus, anything outside "opt/" must be forbidden and cause a failure.

Gerd and others asked for a way to bypass this "for development"
which presumably means they way a quick way to develop guest
code interacting with QEMU without changing qemu proper,
with the intent to merge support into QEMU a bit later.

We could add a special flag for this instead but the mapping
is a couple of lines of code, so seems easier,
the point is to have "unsupported" there.


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