From: Mark Rutland <mark.rutland@arm.com>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Rob Herring <robherring2@gmail.com>,
Frank Rowand <frowand.list@gmail.com>,
Rob Herring <robh+dt@kernel.org>,
"grant.likely@linaro.org" <grant.likely@linaro.org>,
Michal Marek <mmarek@suse.cz>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Kumar Gala <galak@codeaurora.org>,
Leif Lindholm <leif.lindholm@linaro.org>,
Pawel Moll <Pawel.Moll@arm.com>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kbuild@vger.kernel.org" <linux-kbuild@vger.kernel.org>,
Linux Kernel list <linux-kernel@vger.kernel.org>
Subject: Re: [patch 2/7] dt: dtb version: document chosen/dtb-info node binding
Date: Thu, 19 Mar 2015 18:53:06 +0000 [thread overview]
Message-ID: <20150319185306.GB11683@leverpostej> (raw)
In-Reply-To: <20150319184139.GG8656@n2100.arm.linux.org.uk>
> And yes, you are right - anything like this which we add immediately
> becames a user ABI which becomes *very* difficult to change later, so
> in order to accept anything like this, we have to be absolutely sure
> that this is something we really really really really want to do. Let
> me put it another way: once this is accepted, it will probably be
> impossible to ever change it.
Agreed.
Having debugged issues with bad DTBs in the past without having this
information, I don't see it as being majorly helpful -- the DTB is
relatively simple and can be decompiled.
You don't gain much from being able to read which file it was built from
on a random server you don't have access to, and if you do have access
to the source it's relatively easy to discover the file it was built
from.
So unless there's a really compelling case for this, I don't see the
point in having it.
Mark.
WARNING: multiple messages have this Message-ID (diff)
From: mark.rutland@arm.com (Mark Rutland)
To: linux-arm-kernel@lists.infradead.org
Subject: [patch 2/7] dt: dtb version: document chosen/dtb-info node binding
Date: Thu, 19 Mar 2015 18:53:06 +0000 [thread overview]
Message-ID: <20150319185306.GB11683@leverpostej> (raw)
In-Reply-To: <20150319184139.GG8656@n2100.arm.linux.org.uk>
> And yes, you are right - anything like this which we add immediately
> becames a user ABI which becomes *very* difficult to change later, so
> in order to accept anything like this, we have to be absolutely sure
> that this is something we really really really really want to do. Let
> me put it another way: once this is accepted, it will probably be
> impossible to ever change it.
Agreed.
Having debugged issues with bad DTBs in the past without having this
information, I don't see it as being majorly helpful -- the DTB is
relatively simple and can be decompiled.
You don't gain much from being able to read which file it was built from
on a random server you don't have access to, and if you do have access
to the source it's relatively easy to discover the file it was built
from.
So unless there's a really compelling case for this, I don't see the
point in having it.
Mark.
WARNING: multiple messages have this Message-ID (diff)
From: Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>
To: Russell King - ARM Linux <linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>
Cc: Rob Herring <robherring2-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Frank Rowand
<frowand.list-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
"grant.likely-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org"
<grant.likely-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Michal Marek <mmarek-AlSwsSmVLrQ@public.gmane.org>,
Ian Campbell
<ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org>,
Kumar Gala <galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
Leif Lindholm
<leif.lindholm-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Pawel Moll <Pawel.Moll-5wv7dgnIgG8@public.gmane.org>,
"devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>,
"linux-kbuild-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kbuild-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Linux Kernel list
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [patch 2/7] dt: dtb version: document chosen/dtb-info node binding
Date: Thu, 19 Mar 2015 18:53:06 +0000 [thread overview]
Message-ID: <20150319185306.GB11683@leverpostej> (raw)
In-Reply-To: <20150319184139.GG8656-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
> And yes, you are right - anything like this which we add immediately
> becames a user ABI which becomes *very* difficult to change later, so
> in order to accept anything like this, we have to be absolutely sure
> that this is something we really really really really want to do. Let
> me put it another way: once this is accepted, it will probably be
> impossible to ever change it.
Agreed.
Having debugged issues with bad DTBs in the past without having this
information, I don't see it as being majorly helpful -- the DTB is
relatively simple and can be decompiled.
You don't gain much from being able to read which file it was built from
on a random server you don't have access to, and if you do have access
to the source it's relatively easy to discover the file it was built
from.
So unless there's a really compelling case for this, I don't see the
point in having it.
Mark.
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next prev parent reply other threads:[~2015-03-19 18:53 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-19 3:29 [patch 0/7] dt: dtb version: add version info to dtb Frank Rowand
2015-03-19 3:29 ` Frank Rowand
2015-03-19 3:31 ` [patch 1/7] dt: dtb version: consolidate documentation of chosen node bindings Frank Rowand
2015-03-19 3:31 ` Frank Rowand
2015-03-19 13:40 ` Mark Rutland
2015-03-19 13:40 ` Mark Rutland
2015-03-19 3:33 ` [patch 2/7] dt: dtb version: document chosen/dtb-info node binding Frank Rowand
2015-03-19 3:33 ` Frank Rowand
2015-03-19 13:23 ` Rob Herring
2015-03-19 13:23 ` Rob Herring
2015-03-19 16:42 ` Frank Rowand
2015-03-19 16:42 ` Frank Rowand
2015-03-19 18:41 ` Russell King - ARM Linux
2015-03-19 18:41 ` Russell King - ARM Linux
2015-03-19 18:53 ` Mark Rutland [this message]
2015-03-19 18:53 ` Mark Rutland
2015-03-19 18:53 ` Mark Rutland
2015-03-19 19:01 ` Frank Rowand
2015-03-19 19:01 ` Frank Rowand
2015-03-19 19:32 ` Russell King - ARM Linux
2015-03-19 19:32 ` Russell King - ARM Linux
2015-03-19 19:32 ` Russell King - ARM Linux
2015-03-19 20:44 ` Frank Rowand
2015-03-19 20:44 ` Frank Rowand
2015-03-20 14:42 ` Mark Rutland
2015-03-20 14:42 ` Mark Rutland
2015-03-20 14:42 ` Mark Rutland
2015-03-19 13:49 ` Mark Rutland
2015-03-19 13:49 ` Mark Rutland
2015-03-19 17:02 ` Frank Rowand
2015-03-19 17:02 ` Frank Rowand
2015-03-19 17:23 ` Geert Uytterhoeven
2015-03-19 17:23 ` Geert Uytterhoeven
2015-03-19 19:12 ` Mark Rutland
2015-03-19 19:12 ` Mark Rutland
2015-03-19 21:27 ` Frank Rowand
2015-03-19 21:27 ` Frank Rowand
2015-03-20 15:25 ` Mark Rutland
2015-03-20 15:25 ` Mark Rutland
2015-03-19 17:37 ` Frank Rowand
2015-03-19 17:37 ` Frank Rowand
2015-03-19 17:37 ` Frank Rowand
2015-03-19 17:37 ` Frank Rowand
2015-03-19 3:34 ` [patch 3/7] dt: dtb version: arm dts Makefile Frank Rowand
2015-03-19 3:34 ` Frank Rowand
2015-03-19 3:34 ` Frank Rowand
2015-03-19 3:36 ` [patch 4/7] dt: dtb version: kernel Makefile Frank Rowand
2015-03-19 3:36 ` Frank Rowand
2015-03-19 3:38 ` [patch 5/7] dt: dtb version: kbuild scripts Frank Rowand
2015-03-19 3:38 ` Frank Rowand
2015-03-19 3:39 ` [patch 6/7] dt: dtb version: dtsi files Frank Rowand
2015-03-19 3:39 ` Frank Rowand
2015-03-19 18:46 ` Sascha Hauer
2015-03-19 18:46 ` Sascha Hauer
2015-03-19 3:41 ` [patch 7/7] dt: dtb version: report dtb info Frank Rowand
2015-03-19 3:41 ` Frank Rowand
2015-03-19 8:12 ` [patch 0/7] dt: dtb version: add version info to dtb Gregory CLEMENT
2015-03-19 8:12 ` Gregory CLEMENT
2015-03-19 17:05 ` Frank Rowand
2015-03-19 17:05 ` Frank Rowand
2015-03-20 13:46 ` Rob Herring
2015-03-20 13:46 ` Rob Herring
2015-03-20 19:14 ` Uwe Kleine-König
2015-03-20 19:14 ` Uwe Kleine-König
2015-03-20 19:14 ` Uwe Kleine-König
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